Pre-buried connecting piece for precast wall

Abstract

The utility model belongs to prefabricated building technical field provides a kind of precast wall with embedded connecting piece, the precast wall with embedded connecting piece includes mounting plate, several screw sleeves and several hooking ribs, mounting plate is equipped with several mounting holes, one side is joint surface, joint surface is used to be combined with wallboard;Several screw sleeves are one-to-one corresponding with mounting hole, screw sleeve protrudes joint surface and mounting plate fixed connection through mounting hole;Several hooking ribs are spaced apart in the side of the joint surface of mounting plate, one end is fixedly connected with joint surface, and the other end is provided with a hook.The precast wall with embedded connecting piece provided by the utility model, the hook of hooking rib and concrete form mechanical engagement, avoid the integral displacement of connecting piece along screw sleeve axis direction;After screw sleeve and mounting plate fixed connection, the bolt tightening force borne by screw sleeve, wallboard splicing stress can be transmitted to hooking rib by mounting plate, then by hooking rib disperses to wallboard concrete, greatly improves the combination strength of screw sleeve and wallboard.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated building technology, specifically relating to a pre-embedded connector for prefabricated walls. Background Technology

[0002] Precast wall panels are one of the core components of prefabricated buildings. They refer to wall components manufactured in a factory through standardized production processes (rebar tying, concrete pouring, curing, etc.) and transported to the construction site for direct installation. This allows for "factory prefabrication and on-site assembly," significantly improving construction efficiency and reducing on-site wet work. The connection method directly determines the structural safety, seismic performance, and functionality of the building, and must be selected specifically based on the wall panel type, load-bearing requirements, and building scenario.

[0003] The connection methods between precast wall panels and adjacent precast wall panels or precast beams are usually tongue and groove grouting connection or bolt connection. Among them, bolt connection is more flexible and convenient.

[0004] Current bolted connections typically involve pre-embedding threaded sleeves near the edge of the wall panel, then using a connecting plate and bolts. The connecting plate spans the joint between the wall panels, with bolts at both ends connecting to the threaded sleeves of the adjacent wall panel, thus fixing the two wall panels together.

[0005] However, if the threaded sleeve is directly embedded in the wall panel, the bonding strength between the threaded sleeve and the wall panel is relatively weak, and the threaded sleeve is prone to loosening after a period of use. Utility Model Content

[0006] This utility model provides a pre-embedded connector for precast walls, which addresses the technical problems mentioned in the background section above.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a pre-embedded connector for precast walls, comprising: The mounting plate has several mounting holes, and one side is a mating surface, which is used to connect with the wall panel. A plurality of threaded sleeves are provided, each corresponding to a mounting hole. The threaded sleeves pass through the mounting holes, protrude from the mating surface, and are fixedly connected to the mounting plate. Several hooks are spaced apart on one side of the mating surface of the mounting plate, with one end fixedly connected to the mating surface and the other end provided with a hook; The threaded sleeve and the hook bar are used to be pre-embedded in the wall panel.

[0008] In one possible implementation of the prefabricated wall embedded connector provided by this utility model, the mounting plate has two mounting holes, and the threaded sleeve is inserted and fixedly connected in each mounting hole.

[0009] In one possible implementation of the pre-embedded connector for precast walls provided by this utility model, the axis of the threaded sleeve is perpendicular to the length direction of the hook reinforcement.

[0010] In one possible implementation of the prefabricated wall embedded connector provided by this utility model, three hook bars are included, two of which are located away from the mounting plate and are bent at the ends and fixedly connected to the mounting plate to form tensile bars; the remaining hook bar is located close to the mounting plate and is fixedly connected to the mounting plate to form compressive bars, and the hooks on the tensile bars and the compressive bars are arranged facing each other.

[0011] In one possible implementation of the pre-embedded connector for prefabricated walls provided by this utility model, the hook is a right-angle hook.

[0012] In one possible implementation of the pre-embedded connector for prefabricated walls provided by this utility model, a reinforcing rib is further included, wherein the reinforcing rib passes through the two threaded sleeves perpendicular to the axis of the threaded sleeve.

[0013] In one possible implementation of the pre-embedded connector for prefabricated walls provided by this utility model, the other side of the mounting plate is a mounting surface, which is flush with the end face of the threaded sleeve.

[0014] In one possible implementation of the pre-embedded connector for prefabricated walls provided by this utility model, a sealing ring groove is provided around the mounting surface, a sealing ring is embedded in the sealing ring groove, and the sealing ring protrudes from the mounting surface.

[0015] The beneficial effects of the pre-embedded connector for precast walls provided by this utility model are as follows: Compared with the prior art, the pre-embedded connector for precast walls provided by this utility model improves the anchoring effect through the combination structure of "installation plate + hook bar": the installation plate increases the contact area with the concrete, disperses the force on the threaded sleeve, and connects several threaded sleeves into a whole to ensure the bonding strength; the hook bar's hook forms a mechanical engagement with the concrete, preventing the connector from shifting along the threaded sleeve axis; after the threaded sleeve is fixedly connected to the installation plate, the bolt tightening force and wall panel splicing stress borne by the threaded sleeve can be transferred to the hook bar through the installation plate, and then dispersed to the wall panel concrete by the hook bar, greatly improving the bonding strength between the threaded sleeve and the wall panel and preventing the threaded sleeve from loosening after long-term use. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of the pre-embedded connector for prefabricated walls provided in an embodiment of this utility model; Figure 2 A schematic diagram illustrating the usage status of the pre-embedded connector for prefabricated walls provided in this embodiment of the utility model; Explanation of reference numerals in the attached figures: 10. Mounting plate; 20. Screw sleeve; 30. Hook reinforcement; 301. Bent hook; 31. Tensile reinforcement; 32. Compression ribs; 40. Reinforcing ribs; 50. Sealing rings; 60. Wall panels. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0024] Please refer to the following: Figures 1 to 2 The pre-embedded connector for precast walls provided by this utility model is described below. The pre-embedded connector for precast walls includes an mounting plate 10, a plurality of threaded sleeves 20, and a plurality of hook ribs 30. The mounting plate 10 has a plurality of mounting holes, one side of which is a mating surface for mating with the wall panel 60. The plurality of threaded sleeves 20 correspond one-to-one with the mounting holes, and the threaded sleeves 20 pass through the mounting holes, protrude from the mating surface, and are fixedly connected to the mounting plate 10. The plurality of hook ribs 30 are spaced apart on the side of the mating surface of the mounting plate 10, one end of which is fixedly connected to the mating surface, and the other end is provided with a hook 301. The threaded sleeves 20 and hook ribs 30 are used to be pre-embedded in the wall panel 60.

[0025] It should be noted that the mounting plate 10 is installed on one side of the wall panel 60 along its thickness. The mating surface of the mounting plate 10 is the side that directly contacts the concrete of the wall panel 60. Therefore, surface flatness must be ensured to increase the contact area with the concrete. Steel (such as Q235 steel) is preferred for its material to balance strength and weldability. The diameter of the mounting hole matches the outer diameter of the threaded sleeve 20. The fixing connection between the threaded sleeve 20 and the mounting hole can be achieved by welding (such as arc welding), ensuring no relative displacement between the threaded sleeve 20 and the mounting plate 10. The length of the threaded sleeve 20 protruding from the mating surface must match the thickness of the wall panel 60 to ensure proper screw thread fit. The threaded hole of sleeve 20 can be exposed after the wall panel 60 is formed (or reserved for operation space) to facilitate the subsequent installation of bolts; the material of hook reinforcement 30 is hot-rolled ribbed steel bar (such as HRB400E), and the spacing distribution direction can be along the length / width direction of the mounting plate 10. The orientation of hook 301 can be designed according to the stress direction of the wall panel 60 (such as towards the center of the mounting plate 10). The length of hook 301 needs to meet the concrete bond strength requirements. When pre-embedded, the mounting plate 10, threaded sleeve 20 and hook reinforcement 30 are embedded into the concrete of the wall panel 60 as a whole, and only the other side (non-joint surface) of the mounting plate 10 can be exposed or reserved.

[0026] The beneficial effects of the precast wall embedded connector provided in this embodiment of the utility model are as follows: Compared with the prior art, the precast wall embedded connector provided in this embodiment of the utility model improves the anchoring effect through the combination structure of "installation plate 10 + hook bar 30": the installation plate 10 increases the contact area with the concrete, disperses the force on the threaded sleeve 20, and connects several threaded sleeves 20 into a whole to ensure the bonding strength; the hook 301 of the hook bar 30 forms a mechanical engagement with the concrete, preventing the connector from shifting along the axis of the threaded sleeve 20; after the threaded sleeve 20 is fixedly connected to the installation plate 10, the bolt tightening force and wall panel 60 splicing stress borne by the threaded sleeve 20 can be transmitted to the hook bar 30 through the installation plate 10, and then dispersed to the concrete of the wall panel 60 by the hook bar 30, which greatly improves the bonding strength between the threaded sleeve 20 and the wall panel 60 and prevents the threaded sleeve 20 from loosening after long-term use.

[0027] like Figure 1 and Figure 2 As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, the mounting plate 10 has two mounting holes, and a connecting screw sleeve 20 is inserted and fixed in each mounting hole.

[0028] It should be noted that the two mounting holes are preferably symmetrically distributed on the mounting plate 10 (e.g., at both ends along the length of the mounting plate 10) to ensure that the bolts are subjected to balanced force when adjacent wall panels 60 are spliced; the axes of the two threaded sleeves 20 are parallel and the height of their protrusions from the mating surface is consistent to ensure that the subsequent connecting plate (across the joint of the wall panels 60) can simultaneously fit the end faces of the two threaded sleeves 20, avoiding deformation of the connecting plate due to the height difference of the threaded sleeves 20; the specifications of the threaded sleeves 20 (e.g., thread type, length) must match the load-bearing capacity required for the connection of the wall panels 60.

[0029] Compared to the single threaded sleeve 20 design, the two symmetrically distributed threaded sleeves 20 can achieve "two-point fixation", dispersing the lateral / longitudinal stress during the splicing of the wall panel 60, and avoiding the failure of the bond force between the single threaded sleeve 20 and the concrete due to the concentration of force. At the same time, the symmetrical structure makes the force on the connector within the wall panel 60 more balanced, reducing the cracking of the concrete of the wall panel 60 caused by excessive local stress, further improving the connection stability between the threaded sleeve 20 and the wall panel 60, and reducing the risk of loosening.

[0030] like Figure 1 and Figure 2 As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, the axis of the threaded sleeve 20 is perpendicular to the length direction of the hook rib 30.

[0031] It should be noted that the axial direction of the threaded sleeve 20 is the direction in which the bolt passes through. In the prior art, the length direction of the hook rib 30 is usually parallel to the axial direction of the threaded sleeve 20. However, when the mounting plate 10 is installed on one side of the wall panel 60 in the thickness direction, the wall panel 60 is relatively thin, especially in non-load-bearing walls. This results in the hook rib 30 being relatively short, or even having no space to arrange the hook rib 30, which leads to lower bonding strength.

[0032] In this embodiment, the length direction of the hook rib 30 is perpendicular to the axis of the threaded sleeve 20, meaning the hook rib 30 extends along the height or width of the wall, ensuring sufficient length to guarantee the bonding strength. Furthermore, this perpendicularity allows the lateral forces (such as bolt tension and shear force of the wall panel 60) borne by the threaded sleeve 20 and the longitudinal forces (such as concrete bond force and pull-out force of the connector) borne by the hook rib 30 to form an orthogonal force system. For example, when the bolt is tightened, generating lateral tension, the tension is transmitted through the mounting plate 10 to the longitudinally distributed hook rib 30. The hook rib 30 resists the tension through the engagement of the hook 301 with the concrete, avoiding conflict in the direction of force transmission that could lead to localized stress concentration.

[0033] The axis of the threaded sleeve 20 is perpendicular to the length direction of the hook reinforcement 30, which provides sufficient space in the wall panel 60 to accommodate the hook reinforcement 30, ensuring the length of the hook reinforcement 30 and optimizing the force transmission path: the lateral stress borne by the threaded sleeve 20 can be efficiently transmitted to the hook reinforcement 30 through the mounting plate 10. The longitudinal extension of the hook reinforcement 30 can disperse the stress to a larger area of ​​the concrete of the wall panel 60, avoiding stress concentration in a small area around the threaded sleeve 20; at the same time, the orthogonal force can prevent the hook reinforcement 30 from bending and deforming due to the lateral force, ensuring the anchoring effect of the hook reinforcement 30, thereby improving the bonding strength between the threaded sleeve 20 and the wall panel 60 and reducing the possibility of loosening.

[0034] like Figure 1 and Figure 2As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, three hook bars 30 are included. Two hook bars 30 are set away from the mounting plate 10 and are fixedly connected to the mounting plate 10 after being bent at the end to form a tensile bar 31. The remaining hook bar 30 is set close to the mounting plate 10 and is fixedly connected to the mounting plate 10 to form a compressive bar 32. The hooks 301 on the tensile bar 31 and the compressive bar 32 are arranged facing each other.

[0035] It should be noted that the three hook bars 30 are distributed along the length of the mounting plate 10: two tensile bars 31 are located at both ends of the mounting plate 10 (away from the center), and their ends first extend away from the mounting plate 10, then bend 90° and are welded to the mating surface of the mounting plate 10 to form an "L" shaped structure (the bent section fits against the mounting plate 10), which can effectively resist the pulling force of the connector being pulled out; one compressive bar 32 is located in the middle of the mounting plate 10 (close to the center), and is directly welded to the mating surface, with the hook 301 facing the hook 301 of the tensile bar 31 (e.g., the hook 301 of the tensile bar 31 faces inward, and the hook 301 of the compressive bar 32 faces outward), forming an interlocking structure; the hook 301 of the tensile bar 31 and the hook 301 of the compressive bar 32 have the same length and diameter to ensure a balanced bond with the concrete.

[0036] Tensile reinforcement 31 is specifically designed to resist the "pull-out force" generated by bolt tightening or the force exerted on wall panel 60, preventing the connector from coming out of the wall panel 60; compressive reinforcement 32 resists the "compression force" during the splicing of wall panel 60, preventing the connector from shifting into the wall panel 60. The two work together to cover both tensile and compressive stress scenarios. In addition, on the one hand, since the connector is mainly subjected to tensile and pull-out forces and is less subjected to compressive forces, and on the other hand, concrete has strong compressive strength but weak tensile strength. Therefore, setting two tensile reinforcements 31 and one compressive reinforcement 32 can reduce costs while ensuring performance.

[0037] The opposing hooks 301 form an interlocking mechanical interlocking structure, increasing the contact area and friction with the concrete, and preventing the connector from shifting in any direction; the distribution of the three hook ribs 30 makes the mounting plate 10 more evenly stressed, reduces the displacement of the threaded sleeve 20 caused by the deformation of the mounting plate 10, further improves the connection stability, and prevents the threaded sleeve 20 from loosening.

[0038] like Figure 1 and Figure 2 As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, the hook 301 is a right-angle hook.

[0039] It should be noted that the hook 301 is a 90° right-angle hook, and its bending section length is preferably 3-5 times the diameter of the hook bar 30 (e.g., for a hook bar 30 with a diameter of 10mm, the bending section length is 30-50mm). This facilitates processing with a steel bar bending machine (reducing production costs) and ensures the contact area between the bending section and the concrete. The bending direction of the right-angle hook is consistent with the direction of force (e.g., the right-angle hook of the tension bar 31 faces the mounting plate 10, so that the bending section is in close contact with the concrete when subjected to pull-out force), to avoid breakage due to stress concentration at the hook 301.

[0040] Right-angle hooks can be processed using standardized equipment, resulting in higher production efficiency and lower costs compared to curved or acute-angle hooks. A 90° bend allows the hook 301 to form a "surface contact" with the concrete, providing stronger grip compared to point-contact acute-angle hooks and preventing localized damage caused by the acute-angle hook scratching the concrete. The stress distribution of right-angle hooks is more uniform, making them less prone to breakage when subjected to alternating loads (such as earthquakes or temperature changes) over long periods, ensuring the anchoring effect of the hook rib 30 and indirectly preventing the threaded sleeve 20 from loosening.

[0041] like Figure 1 and Figure 2 As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, a reinforcing rib 40 is also included, which passes through the two threaded sleeves 20 perpendicular to the axis of the threaded sleeve 20.

[0042] It should be noted that the material of the reinforcing rib 40 is the same as that of the hook rib 30 (such as HRB400E steel bar), and the diameter is determined according to the distance between the two threaded sleeves 20 (to ensure sufficient strength); the reinforcing rib 40 passes vertically through the middle (or near the end) of the two threaded sleeves 20, and is fixed to the threaded sleeves 20 by welding after installation, forming an integrated structure of "reinforcing rib 40-threaded sleeve 20"; the length of the reinforcing rib 40 can be slightly longer than the distance between the outer sides of the two threaded sleeves 20, and both ends extend into the interior of the wall panel 60 concrete to further enhance the bond with the concrete; if the threaded sleeve 20 is a hollow structure, the reinforcing rib 40 can be directly inserted through the inner hole of the threaded sleeve 20; if the threaded sleeve 20 is a solid threaded structure, a through hole adapted to the reinforcing rib 40 needs to be pre-drilled on the threaded sleeve 20.

[0043] The reinforcing rib 40 connects the two independent threaded sleeves 20 into a whole, preventing the individual threaded sleeves 20 from tilting or shifting due to uneven stress (such as excessive tightening force on one side of the bolt), ensuring that the two threaded sleeves 20 always remain parallel and the spacing is stable; secondly, the reinforcing rib 40 can resist the bending deformation of the threaded sleeves 20 caused by lateral force, preventing cracking at the weld between the threaded sleeves 20 and the mounting plate 10, and ensuring the positional accuracy of the threaded sleeves 20; in addition, the "reinforcing rib 40-threaded sleeve 20-mounting plate 10" form a rigid frame, dispersing stress to a larger area, reducing local pressure on the concrete around the threaded sleeves 20, and preventing the threaded sleeves 20 from loosening due to concrete damage.

[0044] like Figure 1 and Figure 2 As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, the other side of the mounting plate 10 is the mounting surface, which is flush with the end face of the screw sleeve 20.

[0045] The mounting surface of the mounting plate 10 is the side that contacts the external connecting plate (the joint of the wall panel 60), and the surface must be smooth and flat. The end face of the threaded sleeve 20 is flush with the mounting surface, that is, the length of the threaded sleeve 20 protruding from the mating surface is equal to the thickness of the mounting plate 10, so that the open end of the threaded hole of the threaded sleeve 20 is just flush with the mounting surface. The flush design can prevent the end face of the threaded sleeve 20 from protruding from the mounting surface, which would cause the connecting plate to not fit properly, or from being recessed, which would cause the connecting plate to deform under force when the bolt is tightened. The area of ​​the mounting surface must be greater than the contact area between the connecting plate and the mounting plate 10 to ensure that the connecting plate can fit stably.

[0046] The connecting plate fits tightly against the mounting surface, ensuring that the pressure is evenly distributed to the mounting plate 10 when the bolts are tightened. This prevents excessive localized stress on the connecting plate due to the protrusion / recession of the threaded sleeve 20 (e.g., the connecting plate is pushed up when protruding, and the bolts cannot be tightened when recessed), reducing the additional bending moment borne by the threaded sleeve 20. Secondly, the gapless fit prevents the connecting plate from shaking during use, avoiding the bolts from gradually loosening due to vibration. Furthermore, the flush structure facilitates the cleaning of dust and debris from the mounting surface without affecting the subsequent disassembly and reinstallation of the bolts, indirectly extending the service life of the connector. like Figure 1 and Figure 2 As shown, in a specific embodiment of the prefabricated wall embedded connector provided in this utility model, a sealing ring groove is provided around the mounting surface, and a sealing ring 50 is embedded in the sealing ring groove, with the sealing ring 50 protruding from the mounting surface.

[0047] It should be noted that the sealing ring groove is opened circumferentially along the edge of the mounting surface, forming a closed ring (encircling the outside of all threaded sleeves 20). The groove width and depth are adapted to the size of the sealing ring 50 (e.g., groove width 8-12mm, depth 5-8mm). The sealing ring 50 is preferably made of an aging-resistant and weather-resistant elastic material (e.g., EPDM rubber), and its cross-sectional shape can be circular or rectangular. Its height protruding from the mounting surface is 0.5-1mm (to ensure that the sealing ring 50 is compressed when the connecting plate is attached, forming a sealing effect). The sealing ring 50 must be interference-fitted with the ring groove to prevent it from falling off during pre-embedding or installation.

[0048] After being compressed, the sealing ring 50 can seal the gap between the mounting surface and the connecting plate, preventing rainwater, dust, and corrosive media from entering the interior of the threaded sleeve 20, thus avoiding rust on the threads of the threaded sleeve 20 (rust will cause the bolt and threaded sleeve 20 to fail to mesh, leading to loosening) or blockage of the threaded hole (affecting subsequent maintenance). Secondly, it reduces the erosion of the connecting parts by external media, extends the service life of the threaded sleeve 20 and bolt, and ensures long-term connection strength. It is especially suitable for outdoor buildings, underground garages, and other humid or dusty environments, solving the problem that existing open connections are easily affected by the environment, causing the threaded sleeve 20 to loosen. In addition, it can also effectively prevent grout from seeping into the threaded sleeve 20 during production and casting.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-embedded connecting piece for precast walls, characterized in that, include: The mounting plate (10) has several mounting holes and one side is a mating surface, which is used to mat with the wall panel (60); A number of threaded sleeves (20) correspond one-to-one with the mounting holes. The threaded sleeves (20) pass through the mounting holes, protrude from the mating surface, and are fixedly connected to the mounting plate (10). Several hooks (30) are spaced apart on one side of the mating surface of the mounting plate (10), with one end fixedly connected to the mating surface and the other end provided with a hook (301). The threaded sleeve (20) and the hook rib (30) are used to be embedded in the wall panel (60).

2. The precast wall embedded connector of claim 1, wherein, The mounting plate (10) has two mounting holes, and the screw sleeve (20) is inserted and fixedly connected in each mounting hole.

3. The precast wall with embedded connector of claim 2, wherein, The axis of the threaded sleeve (20) is perpendicular to the length direction of the hook rib (30).

4. The pre-embedded connector for precast walls as described in claim 3, characterized in that, It includes three hook ribs (30), two of which are located away from the mounting plate (10) and are bent at the ends and fixedly connected to the mounting plate (10) to form a tensile rib (31); the remaining hook rib (30) is located close to the mounting plate (10) and is fixedly connected to the mounting plate (10) to form a compressive rib (32). The hooks (301) on the tensile rib (31) and the compressive rib (32) are arranged facing each other.

5. The pre-embedded connector for precast walls as described in claim 4, characterized in that, The hook (301) is a right-angle hook.

6. The pre-embedded connector for precast walls as described in claim 2, characterized in that, It also includes a reinforcing rib (40) that passes through the two threaded sleeves (20) perpendicular to the axis of the threaded sleeve (20).

7. The precast wall embedded connector according to any one of claims 1-6, wherein, The other side of the mounting plate (10) is the mounting surface, which is flush with the end face of the screw sleeve (20).

8. The precast wall with embedded connector of claim 7, wherein, A sealing ring groove is provided around the mounting surface, and a sealing ring (50) is embedded in the sealing ring groove, with the sealing ring (50) protruding from the mounting surface.

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