Anchor type split connector and installation method thereof

Abstract

The present invention discloses an anchoring-type split connector and its installation method. The anchoring-type split connector includes a main stress-bearing reinforcement, a reinforced anchoring sleeve and a plastic collar. The main structure of the main stress-bearing reinforcement is cylindrical, and its two ends are elastic locking structures. The reinforced anchoring sleeve is truncated cone-shaped, and is sleeved on both ends of the main stress-bearing reinforcement through the elastic locking structure to strengthen the mechanical bite between the connector and the concrete wall panel, thereby improving the anchoring force of the anchoring-type split connector. The plastic collar is sleeved on the middle of the main stress-bearing reinforcement, and one end of the plastic collar has a plastic baffle and is threaded on the outside. This type of anchoring-type split connector is used to connect the inner and outer leaf concrete wall panels and the middle thermal insulation layer of a prefabricated composite wall. When in use, the two ends of the main stress-bearing reinforcement and the reinforced anchoring sleeve are respectively located in the inner and outer leaf concrete wall panels, and the plastic collar is located in the thermal insulation layer. This type of anchoring-type split connector and its installation method have high anchoring performance and are simple to construct.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated buildings, and in particular relates to an anchoring split connector for connecting precast concrete composite walls and an installation method thereof. Background Art

[0002] Precast concrete composite walls consist of inner and outer concrete panels, with an intermediate insulation layer. They perform the triple functions of load-bearing, enclosure, and insulation, and are widely used in construction. In precast concrete composite walls, connectors primarily connect the inner and outer concrete panels. Therefore, the mechanical properties of these connectors have a crucial impact on the overall performance of the wall panels.

[0003] The existing connectors used in precast concrete composite walls mainly include ordinary steel connectors, stainless steel connectors and fiber reinforced plastic (FRP, Fiber Reinforced Polymer / Plastics) connectors, each with its own advantages and disadvantages: ordinary steel connectors are low-priced and have a strong connection, but have a high thermal conductivity coefficient, which has a significant impact on the thermal insulation performance of precast concrete composite walls, and have poor corrosion resistance, posing a safety hazard to the wall; stainless steel connectors have good corrosion resistance, but also have the disadvantage of a high thermal conductivity coefficient and are relatively expensive, so they are not widely used in the market.

[0004] FRP connectors are currently widely used, as they have the advantages of good corrosion resistance and low thermal conductivity. However, existing FRP connectors often rely on friction with concrete to connect the inner and outer concrete wall panels and the intermediate insulation layer, resulting in poor pull-out resistance and low anchoring performance. At the same time, existing FRP connectors also have the problem of low construction efficiency. Summary of the Invention

[0005] In view of the limitations of the existing technology, the present invention provides an anchor-type split connector and its installation method, aiming to solve the problems of poor pull-out resistance and low anchoring performance in existing FRP connectors due to wall connection only through friction.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: an anchoring-type split connector and an installation method thereof.

[0007] The anchoring-type split connector includes: a load-bearing main reinforcement, a reinforced anchoring sleeve and a plastic collar; wherein the main part of the load-bearing main reinforcement is cylindrical, with both ends being the main reinforcement anchoring ends; the plastic collar is sleeved on the middle part of the load-bearing main reinforcement; the reinforced anchoring sleeve is sleeved on the main reinforcement anchoring ends at both ends of the load-bearing main reinforcement. Through the mechanical engagement of the reinforced anchoring sleeve with the inner and outer concrete wall panels of the composite wall, the anchoring effect of the anchoring-type split connector and the composite wall is strengthened, thereby improving the anchoring strength.

[0008] Preferably, the reinforced anchoring sleeve is truncated cone-shaped; its narrow end is a circular opening, which is used to insert the elastic locking structure of the main reinforcement anchoring end, thereby connecting with the stressed main reinforcement; the truncated cone structure of the reinforced anchoring sleeve increases the mechanical bite effect between it and the inner and outer leaf concrete wall panels of the composite wall, so that the connecting piece has a higher bearing capacity and anti-slip stiffness, which can greatly improve the anchoring strength of the connecting piece; specifically, when pouring concrete, the concrete fills the entire truncated cone structure and wraps it; when the connecting piece is subjected to pull-out force, the truncated cone structure of the reinforced anchoring sleeve makes it squeeze and bite with the surrounding concrete, so that it can withstand greater pull-out force, has better pull-out resistance and higher anchoring strength.

[0009] Another purpose of the anchoring-type split connector provided by the present invention is to solve the problem of low construction efficiency.

[0010] In order to achieve the above-mentioned purpose, the anchoring end of the main reinforcement is set as an elastic lock structure which is wide in the middle and narrow at both ends; specifically, the elastic lock structure is spindle-shaped with a circle of protrusions in the middle; further, the elastic lock structure includes an axially cut elastic lock gap; the elastic lock structure is used to fix the reinforced anchor cap at both ends of the stressed main reinforcement; at the same time, the elastic lock structure can reduce the installation resistance, and workers can quickly install the reinforced anchor cap with their bare hands, which greatly improves the installation efficiency.

[0011] Preferably, the interior of the reinforced anchoring cap is a hollow structure, wherein the hollow structure fits perfectly with the elastic locking structure of the main reinforcement anchoring end, facilitating the engagement of the reinforced anchoring cap with the elastic locking structure of the main reinforcement anchoring end, thereby strengthening the anchoring force of the connector.

[0012] Preferably, the plastic collar is in the shape of a hollow cylinder, which is convenient for passing through the connection hole opened at the installation position of the thermal insulation layer; the inner diameter of the plastic collar matches the outer diameter of the main reinforcement, so that the plastic collar fits tightly against the main reinforcement.

[0013] Preferably, a plastic baffle is provided at one end of the plastic sleeve, which can prevent the unhardened concrete slurry in the outer leaf concrete wall panel from seeping into the holes of the connector on the wall insulation layer during installation, thereby ensuring that the present invention does not affect the overall insulation effect of the prefabricated composite wall; at the same time, the plastic baffle is used to position the connector in the composite wall. During installation, the plastic baffle is located on the side of the outer leaf concrete wall panel, close to the insulation layer.

[0014] Preferably, the outside of the plastic collar is engraved with threads to facilitate fixing the connector in the thermal insulation layer of the wall.

[0015] Preferably, the length of the plastic collar is set according to the thickness of the thermal insulation layer so that the end of the plastic collar is flush with the edge of the thermal insulation layer during installation.

[0016] Preferably, the plastic collar material is acrylonitrile-butadiene-styrene plastic (ABS plastic).

[0017] Preferably, the plastic baffle material is ABS plastic.

[0018] The installation method of the anchor-type split connector provided by the present invention comprises the following steps:

[0019] Step 1: First, lay the longitudinal and transverse reinforcement of the outer leaf concrete wall panel in the formwork, and perform the position layout of the anchor-type split connector according to the design drawing. After the position layout is completed, remove the reinforced anchor sleeve on the side of the anchor-type split connector without the plastic baffle, and insert the main force-bearing reinforcement on the other side together with the reinforced anchor sleeve into the steel mesh of the outer leaf concrete wall panel, so that the anchor-type split connector is perpendicular to the outer leaf concrete wall panel and the surface of the plastic baffle is flush with the specified thickness of the outer leaf concrete wall panel. Fix the anchor-type split connector to the steel mesh of the outer leaf concrete wall panel with binding wire, firmly fix it to prevent position deviation or disturbance during production, and cast the outer leaf concrete wall panel to the specified thickness.

[0020] Step 2: Locate the positions of the anchor-type split connectors on the thermal insulation layer according to the design drawing, perforate the thermal insulation layer at each lofted position, and then dock the thermal insulation layer and the outer leaf concrete wall panel according to the anchor-type split connectors fixed on the outer leaf concrete wall panel and the perforations on the thermal insulation layer. After docking, install the reinforced anchor cap removed in step 1 on the end of each anchor-type split connector through the elastic lock structure;

[0021] Step 3: Lay the longitudinal and transverse reinforcement of the inner leaf concrete wall panel on the side of the thermal insulation layer away from the outer leaf concrete wall panel, cast the inner leaf concrete wall panel to the specified thickness, and remove the formwork for maintenance.

[0022] The anchoring-type split connector and its installation method provided by the present invention, on the one hand, increase the mechanical bite effect between it and the inner and outer concrete wall panels of the composite wall through the reinforced anchoring sleeve, which can improve the anchoring strength of the connector and enhance the integrity of the composite wall, thereby further improving the project quality; on the other hand, the anchoring end design of the anchoring-type split connector facilitates the installation of the reinforced anchoring sleeve, improves the construction and installation efficiency, and reduces the installation cost; the anchoring-type split connector also retains the advantages of the FRP connector such as low thermal conductivity, good corrosion resistance, high tensile strength, low cost, and strong economic and practicality.

[0023] In particular, the truncated cone structure of the reinforced anchor cap enables better engagement between the inner and outer concrete wall panels of the composite wall, further improving the anchoring strength of the connector; the use of elastic locks at the anchoring ends of the anchor-type split connector also makes installation more convenient and efficient, further improving the overall performance of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a prefabricated composite wall anchoring split connector provided in an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the FRP main reinforcement and reinforced anchor cap of the prefabricated composite wall anchorage split connector provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of a practical application of an embodiment of the present invention in a precast concrete composite wall;

[0027] The structures corresponding to the number marks in the accompanying drawings are: 1 is the FRP main stress-bearing reinforcement, 2 is the main reinforcement anchorage end, 3 is the reinforced anchorage cap, 4 is the ABS plastic collar, 5 is the ABS plastic baffle, 6 is the elastic locking gap at the anchorage end, 7 is the thread, 8 is the outer leaf concrete wall panel, 9 is the thermal insulation layer, and 10 is the inner leaf concrete wall panel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention are intended to fall within the scope of protection of the present invention.

[0029] Figure 1 The structure of the prefabricated composite wall anchoring split connector provided by an embodiment of the present invention is shown; Figure 2 The diagram shows the FRP main reinforcement and reinforced anchor cap of the prefabricated composite wall anchorage split connector provided by an embodiment of the present invention; Figure 3 An example of the practical application of an embodiment of the present invention in a precast concrete composite wall is shown. For ease of explanation, the following is detailed with reference to the following specific examples and accompanying drawings:

[0030] like Figure 1 and Figure 2 As shown, this embodiment includes an FRP stress-bearing main reinforcement 1, a main reinforcement anchoring end 2, a reinforced anchoring cap 3, an ABS plastic collar 4, an ABS plastic baffle 5, an anchoring end elastic locking gap 6, and a thread 7.

[0031] The main part of the FRP stressed main reinforcement 1 is cylindrical, with its two ends serving as main reinforcement anchorage ends 2; the main reinforcement anchorage end 2 is an elastic locking structure that is wide in the middle, narrow at both ends, and has a transverse slit, with an anchorage end elastic locking slit 6 cut therein; the reinforced anchorage cap 3 is sleeved on the main reinforcement anchorage end 2 through the elastic locking structure; the reinforced anchorage cap 3 is truncated cone-shaped, with one end narrow and the other end wide; the narrow end is a circular opening for sleeved onto the main reinforcement anchorage end 2; the interior of the reinforced anchorage cap 3 is a hollow structure, wherein the hollow structure is completely fitted with the elastic locking structure of the main reinforcement anchorage end 2, making it easy for the reinforced anchorage cap 3 to engage with the elastic locking structure of the main reinforcement anchorage end 2.

[0032] The ABS plastic collar 4 is in the shape of a hollow cylinder and is sleeved on the middle part of the FRP main reinforcement 1; its inner diameter matches the outer diameter of the FRP main reinforcement 1, so that the ABS plastic collar 4 fits tightly with the FRP main reinforcement 1; the outside of the ABS plastic collar 4 is engraved with a thread 7 and a plastic baffle 5 at one end.

[0033] like Figure 3 As shown: in actual application, the reinforced anchoring caps 3 at both ends provided by the embodiment of the present invention are respectively located in the outer leaf concrete wall panel 8 and the inner leaf concrete wall panel 10; the ABS plastic collar 4 and the middle part of the main load-bearing reinforcement wrapped therein are located inside the thermal insulation layer 9; the ABS plastic baffle 5 at one end of the ABS plastic collar 4 is located in the outer leaf concrete wall panel 10, close to one side edge of the thermal insulation layer 9; the other end of the ABS plastic collar 4 is flush with the other side edge of the thermal insulation layer 9.

[0034] The installation method of the anchor-type split connector provided in an embodiment of the present invention includes the following steps:

[0035] Step 1: First, lay the longitudinal and transverse steel bars of the outer leaf concrete wall panel 8 in the template, and perform the position layout of the anchor-type split connector according to the design drawing. After the position layout is completed, remove the reinforced anchor sleeve 3 on the side of the anchor-type split connector without the plastic baffle 5, and insert the main force bar 1 on the other side together with the reinforced anchor sleeve 3 into the steel mesh of the outer leaf concrete wall panel 8, so that the anchor-type split connector is perpendicular to the outer leaf concrete wall panel 8 and the surface of the plastic baffle 5 is flush with the specified thickness of the outer leaf concrete wall panel 8, fix the anchor-type split connector to the steel mesh of the outer leaf concrete wall panel 8 with binding wire, and fix it firmly to prevent position deviation or disturbance during the production process, and cast the outer leaf concrete wall panel 8 to the specified thickness;

[0036] Step 2: Loft the position of the anchor-type split connector on the thermal insulation layer 9 according to the design drawing, perforate the thermal insulation layer 9 at each lofted position, and then dock the thermal insulation layer 9 and the outer leaf concrete wall panel 8 according to the anchor-type split connector fixed on the outer leaf concrete wall panel 8 and the perforations on the thermal insulation layer 9. After docking, install the reinforced anchor cap 3 removed in step 1 on the end of each anchor-type split connector through the elastic lock structure;

[0037] Step 3: Lay the longitudinal and transverse reinforcement of the inner leaf concrete wall panel 10 on the side of the thermal insulation layer 9 away from the outer leaf concrete wall panel 8, cast the inner leaf concrete wall panel 10 to a specified thickness, and remove the formwork for curing.

[0038] The anchoring-type split connector and its installation method provided in this embodiment improve the anchoring strength of the connector through the unique frustum-shaped design of the anchoring-type split connector, enhance the integrity of the composite wall, and thus further improve the quality of the project; at the same time, the anchoring end of the anchoring-type split connector uses an elastic lock structure, which is easy to install, improves the construction and installation efficiency, and reduces the installation cost; the anchoring-type split connector also retains the advantages of FRP connectors such as low thermal conductivity, good corrosion resistance, high tensile strength, low cost, and strong economic and practicality.

[0039] 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 in the scope of protection of the present invention.

Claims

1. An anchoring type split connector, characterized in that: include: Main reinforcement, plastic collar and reinforced anchor cap; The main body of the main reinforcement is cylindrical; The plastic sleeve is sleeved on the middle part of the main reinforcement; The reinforced anchor caps are placed on both ends of the main reinforcement to strengthen the anchoring effect between the anchor-type split connector and the composite wall; The two ends of the main reinforcement are elastic lock structures with a wide middle and narrow ends; The elastic lock structure is an axially cut elastic lock gap; The interior of the reinforced anchor cap is a hollow structure, wherein the hollow structure engages with the elastic lock structures at both ends of the stressed main reinforcement to achieve the connection between the reinforced anchor cap and the stressed main reinforcement; The reinforced anchoring cap is in the shape of a truncated cone, with a narrow end being a circular opening, and is connected to the stressed main reinforcement; its truncated cone structure is used to strengthen the anchoring effect with the composite wall.

2. The anchor-type split connector according to claim 1, characterized in that: The elastic lock structure is in a shuttle shape with a raised circle in the middle.

3. The anchor-type split connector according to claim 1, characterized in that: The plastic collar is in the shape of a hollow cylinder, and its inner diameter matches the outer diameter of the main reinforcement, so that the plastic collar fits tightly against the main reinforcement.

4. The anchor-type split connector according to claim 1 or 3, characterized in that: A plastic baffle is provided at one end of the plastic sleeve.

5. The anchor-type split connector according to claim 1 or 3, characterized in that: The plastic collar is externally engraved with threads.

6. The method for installing the anchor-type split connector according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: First, lay the longitudinal and transverse reinforcement of the outer leaf concrete wall panel in the formwork, and then stake out the position of the anchor-type split connector according to the design drawing. After the position stakeout is completed, remove the reinforced anchor sleeve on the side of the anchor-type split connector without the plastic baffle. Insert the main reinforcement on the other side of the anchor-type split connector together with the reinforced anchor sleeve into the steel mesh of the outer leaf concrete wall panel, so that the anchor-type split connector is perpendicular to the outer leaf concrete wall panel and the surface of the plastic baffle is flush with the specified thickness of the outer leaf concrete wall panel. Fix the anchor-type split connector to the steel mesh of the outer leaf concrete wall panel with binding wire, and cast the outer leaf concrete wall panel to the specified thickness. Step 2: Loft the position of the anchor-type split connector on the thermal insulation layer according to the design drawing, perforate the thermal insulation layer at each lofted position, and then dock the thermal insulation layer and the outer leaf concrete wall panel according to the anchor-type split connector fixed on the outer leaf concrete wall panel and the perforations on the thermal insulation layer. After docking, install the reinforced anchor cap removed in step 1 on the end of each anchor-type split connector through an elastic locking structure, wherein the elastic locking structure is located at both ends of the stressed main reinforcement and the elastic locking structure is wide in the middle and narrow at both ends. The elastic locking structure is an axially cut elastic locking gap, and the interior of the reinforced anchor cap is a hollow structure, wherein the hollow structure bites with the elastic locking structure at both ends of the stressed main reinforcement to achieve the connection between the strong anchor cap and the stressed main reinforcement; Step 3: Lay the longitudinal and transverse reinforcement of the inner leaf concrete wall panel on the side of the thermal insulation layer away from the outer leaf concrete wall panel, cast the inner leaf concrete wall panel to the specified thickness, and remove the formwork for maintenance.

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