Assembly type prefabricated part connecting piece, pre-burying tool and pre-burying method

Abstract

The invention belongs to the technical field of fabricated buildings, and provides a fabricated prefabricated part connecting piece, a pre-embedding tool and a pre-embedding method.The fabricated prefabricated part connecting piece comprises a connecting steel plate, anchoring steel plates, anchoring steel bars, internal thread sleeves and bolts, the two anchoring steel plates are perpendicularly connected to the two ends of the connecting steel plate correspondingly, and the anchoring steel bars are arranged around the two anchoring steel plates; the two ends of the anchoring steel bars are connected with the outer sides of the two anchoring steel plates correspondingly. The anchoring steel bars are welded to the anchoring steel plate, the anchoring steel bars are reversely welded, the portions, anchored in the prefabricated concrete wall, of the anchoring steel bars form a closed ring, the zigzag grooves are formed in the two sides of the anchoring steel plate, and the connecting steel plate is perpendicularly connected with the anchoring steel plate. The tensile force of the bolt can be transmitted to the prefabricated concrete wall body through an efficient and direct path, shear damage and stress concentration caused by bending of an embedded steel plate in a traditional structure to the anchoring steel bars are eliminated, and therefore the anti-fatigue performance and long-term safety of connection are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of prefabricated buildings, and particularly relates to a prefabricated component connecting piece, a pre-buried tool and a pre-buried method. BACKGROUND

[0002] In the field of prefabricated buildings, reliable connection between prefabricated components is the key to ensuring the integrity and safety of the structure. Among them, the pre-buried connecting piece is widely used because of its good concealment and high connection strength. The traditional connecting piece is usually composed of a pre-buried steel plate, an anchor steel bar vertically welded on the pre-buried steel plate, and a screw rod exposed outside the component. It transmits external load to the interior of the prefabricated component through the anchoring effect of the anchor steel bar in the concrete.

[0003] The disclosure number CN215829702U describes a prefabricated building wallboard connecting node, and the pre-buried steel plate is laid on the top of the anchor steel bar. When the screw rod bears vertical tension, the force directly acts on the pre-buried steel plate, which easily causes the pre-buried steel plate to bend slightly. At this time, the edge of the pre-buried steel plate will produce a downward shearing force on the top of the hook or the welding point of the anchor steel bar below, which not only causes serious stress concentration, but also easily causes fatigue cracks at the hook or welding weak point of the anchor steel bar under long-term or frequent load, and even cuts and breaks, posing a serious threat to the safety of the structure.

[0004] In addition, the anchor steel bar has a hook shape at both ends, and the load is transmitted from the screw rod to the pre-buried steel plate, then to the anchor steel bar through the extrusion of the steel plate, and finally dispersed by the anchoring length of the anchor steel bar in the concrete. This indirect force transmission path relying on friction and adhesion is less efficient. When subjected to dynamic load, repeated load or large load, the adhesion between the anchor steel bar and the concrete is easily damaged, causing the steel bar to slip, loosen, and even break over a long period of time, reducing the reliability and durability of the connection.

[0005] In addition, in the production and construction process, such as component demolding, hoisting, stacking, transportation and on-site installation, collisions inevitably occur. The bottom anchor steel bar of the connecting piece is usually directly exposed on the surface of the component or has a very thin protective layer, which is easily bent, worn or even damaged in these processes. Such damage directly weakens the effective cross-sectional area and anchoring performance of the anchor steel bar, posing a safety hazard to the entire connecting structure, and such damage is concealed and difficult to detect. SUMMARY

[0006] The present application provides a prefabricated component connecting piece, a pre-buried tool and a pre-buried method, which aims to solve the above technical problems.

[0007] The application is achieved, a prefabricated component connecting piece, comprising: a connecting steel plate, an anchoring steel plate, an anchoring steel bar, an internal thread sleeve and a bolt, the connecting steel plate is provided with an O-shaped hole; two anchoring steel plates are respectively connected to the two ends of the connecting steel plate perpendicularly, the anchoring steel plate is embedded in the prefabricated concrete wall; the anchoring steel bar is arranged around the two anchoring steel plates, the two ends of the anchoring steel bar are respectively connected to the outer sides of the two anchoring steel plates, and the anchoring steel bar is embedded in the prefabricated concrete wall; the internal thread sleeve is embedded in the prefabricated concrete wall; the bolt passes through the O-shaped hole and is threadedly connected with the internal thread sleeve.

[0008] Further, the two sides of the anchoring steel plate are respectively provided with a sawtooth-shaped groove.

[0009] Further, the two sides of the anchoring steel plate and the connecting steel plate are connected with a reinforcing rib plate, and the side surface of the reinforcing rib plate is flush with the two sides of the anchoring steel plate.

[0010] Further, the outer surface of the internal thread sleeve is connected with an anchoring rod perpendicularly.

[0011] Further, the anchoring steel bar is in a U-shaped structure.

[0012] Further, it further comprises a round gasket and a rectangular steel gasket, the steel gasket is provided with an oval hole, the bolt passes through the round gasket and the steel gasket, and the round gasket and the steel gasket are clamped between the head of the bolt and the connecting steel plate.

[0013] The application also provides a prefabricated component connecting piece embedding tool for assisting in embedding the prefabricated component connecting piece, comprising: a flange mold, a positioning pad and a reserved hole workpiece, the flange mold is provided with a through hole, and a connecting bolt passes through the through hole; the positioning pad abuts against the flange mold, the connecting bolt passes through the positioning pad, and the size of the positioning pad matches the size of the area surrounded by the connecting steel plate, the two anchoring steel plates and the two reinforcing rib plates; the size of the reserved hole workpiece matches the size of the area surrounded by the connecting steel plate and the two anchoring steel plates, one side of the reserved hole workpiece is provided with a threaded hole, and the connecting bolt is threadedly connected with the threaded hole.

[0014] Further, the top of the reserved hole workpiece is connected with a lifting ring.

[0015] Further, one side of the reserved hole workpiece has an inclined surface structure.

[0016] The application further provides a prefabricated component connecting piece pre-embedding method based on the prefabricated component connecting piece pre-embedding tool, and the method comprises the following steps: a connecting bolt passes through the stop edge mold and the positioning stop block; the area surrounded by the connecting steel plate, the two anchor steel plates and the two reinforcing rib plates of the prefabricated component connecting piece is sleeved with the positioning cushion block and is attached to the stop edge mold; the reserved hole workpiece is placed in the area surrounded by the connecting steel plate and the two anchor steel plates, and the connecting bolt is threadedly connected with the threaded hole of the reserved hole workpiece; the anchor steel plate, the anchor steel bar, the connecting steel plate and the reinforcing rib plate of the prefabricated component connecting piece are pre-embedded by pouring concrete; and the stop plate mold, the positioning cushion block and the reserved hole workpiece are removed after the concrete is solidified.

[0017] The prefabricated component connecting piece provided by the application is characterized in that the anchor steel bar is welded on the anchor steel plate, the anchor steel bar is reversely welded, the part of the anchor steel bar anchored in the prefabricated concrete wall forms a closed loop, the sawtooth-shaped grooves are formed on the two sides of the anchor steel plate, and the connecting steel plate is perpendicularly connected with the anchor steel plate. The combination of the connecting steel plate, the anchor steel plate and the anchor steel bar can transmit the pulling force of the bolt to the prefabricated concrete wall through an efficient and direct path, eliminate the shear damage and stress concentration of the anchor steel bar caused by the bending of the pre-embedded steel plate in the traditional structure, and greatly improve the fatigue resistance and long-term safety of the connection. At the same time, the direct force transmission mechanism no longer mainly depends on the fragile bonding friction, can solve the problems of slip and looseness under long-term or frequent load, and significantly enhances the reliability, stiffness and bearing capacity of the connection. The anchor steel bar and the anchor steel plate are pre-embedded in the prefabricated concrete wall, so that they are not easy to be damaged in the construction link, can effectively eliminate the hidden safety hazards, and improve the construction yield and quality controllability. The application has the advantages of being firm, durable, safe and reliable, and is suitable for the structural connection of prefabricated walls under harsh working conditions. The prefabricated component connecting piece pre-embedding tool and the pre-embedding method provided by the application can simplify the pre-embedding process of the prefabricated component, ensure the accurate positioning of the prefabricated component connecting piece, improve the quality consistency of the prefabricated component connecting piece pre-embedding formation, and lay a foundation for batch and flow production. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the prefabricated component connecting piece provided by the embodiment of the application.

[0019] Figure 2 is Figure 1 is a structural schematic diagram of the prefabricated component connecting piece provided by the embodiment of the application.

[0020] Figure 3 is one of the schematic diagrams of the connection mode between the prefabricated component connecting piece and the wall provided by the embodiment of the application.

[0021] Figure 4 is the second schematic diagram of the wall connecting mode of the assembled prefabricated component connecting piece provided by the embodiment of the present application.

[0022] Figure 5 is the pre-buried schematic diagram of the assembled prefabricated component connecting piece in the wall connecting port.

[0023] Figure 6 is the structural schematic diagram of the pre-buried tooling of the assembled prefabricated component connecting piece.

[0024] Figure 7 is the structural schematic diagram of the blocking edge mold and the positioning cushion block.

[0025] Figure 8 is the internal structural schematic diagram of the reserved hole workpiece.

[0026] Figure 9 is the assembly schematic diagram of the assembled prefabricated component connecting piece and the pre-buried tooling provided by the embodiment of the present application.

[0027] Figure 10 is the assembly schematic diagram of the reserved hole workpiece.

[0028] Figure 11 is the schematic diagram after pouring concrete.

[0029] Figure 12 is the schematic diagram after removing the pre-buried tooling.

[0030] The reference signs in the drawings represent: 1-connection steel plate, 2-anchoring steel plate, 3-anchoring steel bar, 4-internal thread sleeve, 5-bolt, 6-reinforcing rib plate, 7-anchoring rod, 8-round gasket, 9-steel gasket, 10-wall, 11-connecting port, 12-blocking edge mold, 13-connecting bolt, 14-positioning cushion block, 15-reserved hole workpiece, 16-threaded hole, 17-lifting ring, 18-concrete. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0032] Referring to Figures 1-5 , the present application provides an assembled prefabricated component connecting piece, which comprises: a connection steel plate 1, an anchoring steel plate 2, an anchoring steel bar 3, an internal thread sleeve 4 and a bolt 5.

[0033] The connecting steel plate 1 is provided with an O-shaped hole, which can allow a certain range of installation errors to ensure smooth construction. Two anchor steel plates 2 are respectively connected to the two ends of the connecting steel plate 1, and the anchor steel plates 2 are embedded in the prefabricated concrete wall 10.

[0034] The two ends of the connecting steel plate 1 are welded with the anchor steel plates 2, and the anchor steel plates 2 are embedded in the prefabricated concrete wall 10 during use.

[0035] In the embodiment of the application, the two sides of the anchor steel plate 2 are respectively provided with a sawtooth-shaped groove, and the anchor steel plates 2 and the connecting steel plate 1 on the two sides are connected with a reinforcing rib plate 6, and the side surface of the reinforcing rib plate 6 is flush with the anchor steel plates 2 on the two sides.

[0036] The sawtooth-shaped groove can improve the tensile force that the anchor steel plate 2 can withstand after embedding, and avoid overall slippage. The two reinforcing rib plates 6 are respectively used to fix the connecting steel plate 1 and the anchor steel plate 2 to be spliced by welding, and the reinforcing rib plate 6 can improve the bearing capacity of the connecting steel plate 1 and avoid deformation of the connecting steel plate 1.

[0037] The anchor steel bar 3 is arranged around the two anchor steel plates 2, and the two ends of the anchor steel bar 3 are respectively connected to the outer sides of the two anchor steel plates 2, and the anchor steel bar 3 is embedded in the prefabricated concrete wall.

[0038] The anchor steel bar 3 is in a U-shaped structure, and the part of the U-shaped structure abutting against the anchor steel plate 2 is fixed to the anchor steel plate 2 by reverse welding, that is, the two ends of the anchor steel bar 3 are welded to the anchor steel plate 2, and the part of the anchor steel bar 3 embedded or anchored in the prefabricated concrete wall 10 is a closed loop, and the two end portions of the anchor steel bar 3 are away from the edges of the anchor steel plate 2, and the closed loop structure of the anchor steel bar 3 in combination with the sawtooth-shaped groove of the anchor steel plate 2 can effectively increase the anchoring force of the anchor steel plate 2.

[0039] The internally threaded sleeve 4 is embedded in the prefabricated concrete wall, and the bolt 5 passes through the O-shaped hole and is threadedly connected with the internally threaded sleeve 4. The embodiment of the application further includes a circular washer 8 and a rectangular steel washer 9, the steel washer 9 is provided with an elliptical hole, the bolt 5 passes through the circular washer 8 and the steel washer 9, the circular washer 8 and the steel washer 9 are clamped between the head of the bolt 5 and the connecting steel plate 1, and the outer surface of the internally threaded sleeve 4 is vertically connected with the anchor rod 7.

[0040] The length direction of the O-shaped hole of the connecting steel plate 1 is perpendicular to the length direction of the elliptical hole of the steel washer 9, and the elliptical hole of the steel washer 9 also allows a certain range of installation errors to ensure smooth installation. The bolt 5 passes through the circular washer 8, the steel washer 9 and the connecting steel plate 1 in sequence and is threadedly connected with the internally threaded sleeve 4, and the internally threaded sleeve 4 is embedded and anchored in the prefabricated concrete wall 10 by the two anchor rods 7.

[0041] In summary, the assembled prefabricated component connector provided by the embodiment of the application is used, and an overall body composed of an anchor steel plate 2 and an anchor steel bar 3 is embedded at the splicing position of one of the two prefabricated concrete walls 10 to be connected. When embedding, a reserved connecting port 11 is reserved, and the connecting steel plate 1 faces the outer side of the connecting port 11. An inner threaded sleeve 4 is embedded at the splicing position of the other prefabricated concrete wall 10. When the prefabricated concrete walls 10 are assembled, the splicing positions of the two prefabricated concrete walls 10 are aligned, the bolt 5 is sleeved with the round gasket 8 and the steel gasket 9, then passes through the connecting steel plate 1 and is threadedly connected with the inner threaded sleeve 4 on the other wall 10. When connecting, the relative positions of the two walls 10 can be adjusted according to requirements, and meanwhile, the position of the bolt 5 is adjusted by using the O-shaped hole of the connecting steel plate 1 and the elliptical hole of the steel gasket 9. Finally, the connecting port 11 is closed by using mortar.

[0042] Referring to Figures 6-8 , the embodiment of the application provides an embedded tool for the above-mentioned assembled prefabricated component connector, which is used for assisting in embedding the above-mentioned assembled prefabricated component connector, and comprises a flange mold 12, a positioning cushion block 14 and a reserved hole workpiece 15. The flange mold 12 is provided with a through hole, and a connecting bolt 13 passes through the through hole. The positioning cushion block 14 abuts against the flange mold 12, and the connecting bolt 13 passes through the positioning cushion block 14. The size of the positioning cushion block 14 matches the size of the area surrounded by the connecting steel plate 1, the two anchor steel plates 2 and the two reinforcing rib plates 6. The size of the reserved hole workpiece 15 matches the size of the area surrounded by the connecting steel plate 1 and the two anchor steel plates 2. A threaded hole 16 is formed in one side of the reserved hole workpiece 15, and the connecting bolt 13 is threadedly connected with the threaded hole 16.

[0043] The flange mold 12 is a C-shaped steel, and the vertical surface is provided with a through hole. After the flange mold 12 is used to pour the concrete 18, the edge of the solidified concrete 18 is flush with the end surface of the assembled prefabricated component connector.

[0044] The positioning cushion block 14 is used to limit the position of the assembled prefabricated component connector. The four side surfaces of the positioning cushion block 14 respectively abut against the surfaces of the two reinforcing rib plates 6 and the two anchor steel plates 2, and the front and back surfaces of the positioning cushion block 14 respectively abut against the surfaces of the connecting steel plate 1 and the flange mold 12. A through hole is formed in the central position of the positioning cushion block 14, and the connecting bolt 13 simultaneously passes through the through holes of the flange mold 12 and the positioning cushion block 14. The positioning cushion block 14 is made of steel or rubber material, which is convenient for subsequent removal.

[0045] The reserved hole workpiece 15 is used for reserving operation space for installing the bolt 5, the round gasket 8 and the steel gasket 9 after pouring the concrete 18. The reserved hole workpiece 15 is made of a steel framework wrapped with rubber, the steel framework extends out of the rubber block to form a lifting ring 17, one side of the steel framework is welded with a nut, the nut is communicated with the threaded hole 16, and the threaded hole 16 is used for threadedly connecting the connecting bolt 13. In order to facilitate demolding after pouring the concrete 18, one side of the rubber block of the reserved hole workpiece 15 is provided as an outwardly expanding inclined surface structure.

[0046] Referring to Figures 9-12 The embodiment of the present application provides the embedded method of the connecting piece of the fabricated and precast component, and the embedded tooling of the connecting piece of the fabricated and precast component, and the embedded method comprises the following steps.

[0047] S1, the connecting bolt 13 passes through the blocking edge mold 12 and the positioning block 14.

[0048] S2, the connecting steel plate 1, the two anchor steel plates 2 and the two reinforcing rib plates 6 of the connecting piece of the fabricated and precast component are sleeved with the positioning block 14 and abut against the blocking edge mold 12.

[0049] S3, the reserved hole workpiece 15 is placed in the area surrounded by the connecting steel plate 1 and the two anchor steel plates 2, and the connecting bolt 13 is threadedly connected with the threaded hole 16 of the reserved hole workpiece 15.

[0050] The reserved hole workpiece 15 abuts against the connecting steel plate 1 on the side opposite to the inclined surface, and the two sides of the reserved hole workpiece 15 abut against the two anchor steel plates 2 respectively.

[0051] S4, the concrete 18 is poured to embed the anchor steel plate 2, the anchor reinforcing rib 3, the connecting steel plate 1 and the reinforcing rib plate 6 of the connecting piece of the fabricated and precast component.

[0052] S5, after the concrete 18 is solidified, the blocking plate mold 12, the positioning block 14 and the reserved hole workpiece 15 are removed.

[0053] After the blocking plate mold 12, the positioning block 14 and the reserved hole workpiece 15 are removed, as shown in the figure, the reserved hole workpiece 15 leaves operation space in the connecting piece of the fabricated and precast component, which can be used for installing the bolt 5, the round gasket 8 and the steel gasket 9. Figure 12

[0054] The embedded tooling and the embedded method of the connecting piece of the fabricated and precast component provided by the embodiment of the present application can simplify the embedding process of the fabricated and precast component, ensure the accurate positioning of the connecting piece of the fabricated and precast component, improve the quality consistency of the embedded and formed connecting piece of the fabricated and precast component, and lay a foundation for realizing batch and flow production.

[0055] ​The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fabricated precast component connector, characterized by, include: A connecting steel plate, wherein the connecting steel plate is provided with O-holes; Anchor steel plates, two of which are perpendicularly connected to the two ends of the connecting steel plate, are embedded in the precast concrete wall; Anchoring reinforcement bars are provided around the two anchoring steel plates, with both ends of the anchoring reinforcement bars connected to the outer sides of the two anchoring steel plates respectively, and the anchoring reinforcement bars are embedded in the precast concrete wall. An internally threaded sleeve, which is embedded in a precast concrete wall; A bolt that passes through the O-hole and is threadedly connected to the internally threaded sleeve.

2. The prefabricated component connector according to claim 1, characterized in that, The anchoring steel plate has serrated grooves on both sides.

3. The prefabricated component connector according to claim 1, characterized in that, A reinforcing rib is connected between the anchoring steel plates and the connecting steel plates on both sides, and the side of the reinforcing rib is flush with the anchoring steel plates on both sides.

4. The prefabricated component connector according to claim 1, characterized in that, An anchor rod is vertically connected to the outer surface of the internally threaded sleeve.

5. The prefabricated component connector according to claim 1, characterized in that, The anchoring steel bars have a U-shaped structure.

6. The prefabricated component connector according to claim 1, characterized in that, It also includes a round washer and a rectangular steel washer, the steel washer having an elliptical hole, the bolt passing through the round washer and the steel washer, the round washer and the steel washer being held between the head of the bolt and the connecting steel plate.

7. A prefabricated precast component connector pre-embedded tooling, used to assist in the pre-embedding of the prefabricated precast component connector according to any one of claims 1 to 6, characterized in that, include: A retaining mold, wherein the retaining mold has a through hole through which a connecting bolt passes; A positioning pad is attached to the side-blocking mold, and the connecting bolt passes through the positioning pad. The size of the positioning pad matches the size of the area enclosed by the connecting steel plate, the two anchoring steel plates, and the two reinforcing ribs. The workpiece with a pre-drilled hole has dimensions that match the dimensions of the area enclosed by the connecting steel plate and the two anchoring steel plates. A threaded hole is provided on one side of the workpiece with the pre-drilled hole, and the connecting bolt is threaded into the threaded hole.

8. The pre-embedded tooling for prefabricated component connectors according to claim 7, characterized in that, A lifting ring is connected to the top of the workpiece with the reserved hole.

9. The pre-embedded tooling for prefabricated component connectors according to claim 7, characterized in that, The pre-drilled hole workpiece has a beveled structure on one side.

10. A method for pre-embedding connectors in prefabricated components, based on the pre-embedding fixture for prefabricated component connectors as described in any one of claims 7 to 9, characterized in that, Includes the following steps: The connecting bolt passes through the retaining mold and the positioning block; The area enclosed by the connecting steel plate, the two anchoring steel plates and the two reinforcing ribs of the prefabricated component connector is fitted with the positioning pad and attached to the retaining edge mold. The pre-drilled workpiece is placed in the area enclosed by the connecting steel plate and the two anchoring steel plates, and the connecting bolt is threadedly connected to the threaded hole of the pre-drilled workpiece. The precast concrete is poured to embed the anchoring steel plate, the anchoring steel bar, the connecting steel plate, and the reinforcing rib plate of the precast component connector. After the concrete has solidified, the baffle mold, the positioning pad, and the pre-drilled hole workpiece are removed.

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