Plastic anchor bolt special for maintenance of external wall thermal insulation layer
By designing plastic anchors with a structure of metal screws and plastic expansion sleeves, the problem of insufficient anchoring performance in the maintenance of external wall insulation layers was solved, achieving efficient reinforcement and lightweighting, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-07
AI Technical Summary
Existing plastic anchors have insufficient anchoring performance in the maintenance of building exterior wall insulation layers, failing to meet reinforcement requirements, and also suffer from problems such as heavy weight and susceptibility to corrosion.
A special plastic anchor for the maintenance of external wall insulation layer has been designed. It adopts a structure of metal screw and plastic expansion sleeve. The anchoring end is provided with expansion joint and protrusion and depression. There is an injection sealing film between the injection hole and the anchoring end. Polyamide, polyethylene or polypropylene materials are used. The anchoring effect is enhanced after injection.
It improves anchoring strength, enhances the reinforcement effect of the insulation layer, reduces weight and cost, and extends service life.
Smart Images
Figure CN224093655U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of anchor bolt, concretely refers to a special plastic anchor bolt for external wall insulation layer maintenance. BACKGROUND
[0002] In many fields such as building, decoration, anchor bolt is commonly used fixed connecting piece. Traditional anchor bolt is mostly metal material, and has the defects of heavy weight, easy corrosion and the like. With the development of plastic material technology, plastic anchor bolt is gradually applied. However, in the maintenance of building external wall insulation layer, the existing plastic anchor bolt still has deficiencies in anchoring performance, insulation layer reinforcing effect and the like, for example, insufficient anchoring strength, unable to meet the problems such as insulation layer maintenance glue injection reinforcement, which affects the use effect of anchor bolt and the functional requirements of reinforcing insulation layer.
[0003] Therefore, a special plastic anchor bolt for external wall insulation layer maintenance becomes a problem to be solved by people. INVENTION CONTENTS
[0004] The utility model wants to solve the technical problem to provide a special plastic anchor bolt for external wall insulation layer maintenance, through the special glue injection reinforcing function, improve the reinforcing performance of anchor bolt to external wall insulation layer, reduce the weight and cost at the same time, for different types of external wall insulation layer maintenance, divide the plastic anchor bolt of two types of A and B.
[0005] In order to solve the above technical problem, the technical scheme provided by the utility model is as follows: a special plastic anchor bolt for external wall insulation layer maintenance, comprising metal screw and plastic expansion sleeve, plastic disc is arranged at the top of the plastic expansion sleeve, the cavity for accommodating metal screw is arranged in the plastic expansion sleeve, the sleeve is arranged at the upper part of the plastic expansion sleeve, and the anchor end is arranged at the lower part, the glue injection hole for communicating with the cavity is arranged on the sleeve, and the glue injection sealing film is arranged between the glue injection hole and the anchor end.
[0006] Further, the expansion joint is arranged in the middle part of the anchor end along the extension direction of the anchor end, the expansion joint divides the anchor end into several parts, and the convex and concave for increasing friction are arranged on the outer wall of the anchor end.
[0007] Further, the glue injection hole is four holes for communicating with the cavity, and the whole is in the shape of cross.
[0008] Further, the glue injection hole is arranged at 50mm from the anchor end head on the sleeve, the diameter is 2mm or 1.5mm, and the thickness of the glue injection sealing film is 0.5mm.
[0009] In another embodiment of the application, the glue injection hole is arranged along the sleeve at 50mm from the anchor end head, the distance between each group of glue injection holes is 5mm, and the glue injection holes in adjacent groups are distributed in a 45° spiral; the diameter of the glue injection hole is 1mm, and the thickness of the glue injection sealing film is 0.5mm.
[0010] Further, the plastic expansion sleeve is made of polyamide, polyethylene or polypropylene.
[0011] Further, the plastic disc is provided with a plurality of round holes.
[0012] The utility model has the advantages that compared with the prior art, the utility model has the advantages that:
[0013] The expansion joint and the convex and concave part of the outer wall arranged in the middle of the anchoring end can better engage with the base material after the anchor bolt is installed, increase the anchoring strength, and improve the pull-out resistance of the anchor bolt.
[0014] The glue injection sealing film arranged between the glue injection hole and the anchoring end can prevent glue leakage to other places when glue injection, ensure that the glue injection pressure and glue liquid only reach the required place through the glue injection hole, and further enhance the reinforcing effect of the anchor bolt on the thermal insulation layer after glue injection.
[0015] The plastic expansion sleeve is made of polyamide, polyethylene or polypropylene, and compared with the metal anchor bolt, the plastic expansion sleeve is lighter in weight, lower in cost, and not easy to corrode, thereby prolonging the service life of the anchor bolt. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structural schematic view of the plastic anchor bolt of class A.
[0017] Figure 2 is an elevation view of the plastic anchor bolt of class A, and the dashed line in the drawing schematically shows the internal structure.
[0018] Figure 3 is a front view structural schematic view of the plastic disc.
[0019] Figure 4 is a structural schematic view of the plastic anchor bolt of class B.
[0020] Figure 5 is an elevation view of the plastic anchor bolt of class B, and the dashed line in the drawing schematically shows the internal structure.
[0021] As shown in the drawing: 1, metal screw, 2, plastic expansion sleeve, 3, plastic disc, 4, cavity, 5, sleeve, 6, anchoring end, 7, glue injection hole, 8, glue injection sealing film, 9, expansion joint, 10, round hole. DETAILED DESCRIPTION
[0022] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0023] In the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can also be detachably connected or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, can be indirectly connected through an intermediate medium, and can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0024] The utility model discloses a kind of special-purpose plastic anchor bolt of external wall insulation layer maintenance, which will be described in detail below.
[0025] Combined with the drawings Figures 1-5 , the utility model is introduced in detail.
[0026] A kind of special-purpose plastic anchor bolt of external wall insulation layer maintenance, including metal screw 1 and plastic expansion sleeve 2, plastic expansion sleeve 2 top is equipped with plastic disc 3;Plastic expansion sleeve 2 inside is equipped with the cavity 4 of accommodating metal screw 1;The upper portion of plastic expansion sleeve 2 is sleeve 5, and the lower portion is anchoring end 6, sleeve 5 is equipped with glue injection hole 7 that communicates cavity 4, glue injection hole 7 is equipped with glue injection sealing membrane 8 between anchoring end 6.
[0027] The middle part of anchoring end 6 is equipped with expansion joint 9 arranged along its extension direction, expansion joint 9 divides anchoring end 6 into several parts, and the outer wall of anchoring end 6 is equipped with protrusions and recesses for increasing friction.
[0028] The utility model provides two specific setting modes of glue injection hole 7:
[0029] Mode one: glue injection hole 7 is four holes that communicate cavity 4, and the whole is cross-shaped.Further, glue injection hole 7 is arranged at 50mm from anchor bolt head on sleeve 5, with a diameter of 2mm or 1.5mm, and the thickness of glue injection sealing membrane 8 is 0.5mm.
[0030] Mode two: glue injection hole 7 is arranged in several groups along the sleeve at 50mm from anchor bolt head, the spacing between each group of glue injection hole 7 is 5mm, and the glue injection holes 7 of adjacent groups are distributed in a 45° spiral;Glue injection hole 7 has a diameter of 1mm, and the thickness of glue injection sealing membrane 8 is 0.5mm.
[0031] The plastic expansion sleeve 2 is made of polyamide, polyethylene or polypropylene.
[0032] The specific implementation process of the plastic anchor bolt for repairing the external wall thermal insulation layer is as follows:
[0033] The plastic anchor bolt is composed of a metal screw 1 and a plastic expansion sleeve 2 with a disc, and the plastic expansion sleeve 2 is made of polyamide, polyethylene or polypropylene, and cannot be made of regenerated plastic.
[0034] The plastic anchor bolt can be used for repairing the external wall thermal insulation layer. The effective anchoring depth of the plastic anchor bolt should be not less than 25mm and be the anchoring depth into the base wall, and the thickness of the leveling layer or the bonding layer of the wall is not included; the average thickness of the leveling layer and the bonding layer is considered as 20mm, and the hollow part at the joint of the base wall and the thermal insulation layer is about 50mm away from the end of the plastic anchor bolt, so the glue injection hole 7 is arranged at this position.
[0035] When the external wall thermal insulation layer is a certain thickness of the pasted insulation board (EPS, XPS, PUR, rock wool), the plastic anchor bolt of type A is used; when the external wall thermal insulation layer is inorganic and organic thermal insulation slurry (mortar) which is stirred on site and troweled on site, the plastic anchor bolt of type B is used.
[0036] The plastic anchor bolt of type A: four glue injection holes 7 are reserved at a distance of 50mm from the end of the anchor bolt and are distributed in a cross shape; the diameter of the glue injection hole 7 for the special adhesive (or universal glue) for repairing the pasted insulation board thermal insulation layer is 2mm, and the diameter of the glue injection hole 7 for the 901 building glue for repairing the inorganic and organic thermal insulation slurry thermal insulation layer is 1.5mm. In order to ensure the injection pressure, the plastic anchor bolt should reserve a glue injection sealing film 8 with a thickness of 0.5 between the glue injection hole 7 and the anchoring end 6, and after glue injection, the remaining glue in the plastic expansion sleeve 2 is injected into the thermal insulation layer by using the piston rod, and then the glue injection sealing film 8 is pierced by the matched metal screw 1, and the plastic anchor bolt with the plastic disc 3 is used to anchor the thermal insulation layer on the base wall.
[0037] The plastic anchor bolt of type B: five groups of glue injection holes 7 are reserved at a distance of 50mm from the end of the anchor bolt and are distributed in a cross shape, and the interval is 5mm, wherein the second group and the fourth group are arranged at a rotation angle of 45 degrees with the first group, the third group and the fifth group, and the diameter of the glue injection hole 7 is 1mm; in order to ensure the injection pressure, the plastic anchor bolt reserves a glue injection sealing film 8 with a thickness of 0.5 between the first group of glue injection holes 7 and the anchoring end 6, and after glue injection, the remaining glue in the plastic expansion sleeve 2 is injected into the thermal insulation layer by using the piston rod, and then the glue injection sealing film 8 is pierced by the matched metal screw 1, and the plastic anchor bolt with the plastic disc 3 is used to anchor the thermal insulation layer on the base wall.
[0038] The nominal diameter of the plastic disc 3 of the disc anchor bolt should not be less than 60mm, with a tolerance of ±1mm; the nominal diameter of the sleeve 5 should not be less than 8mm, with a tolerance of ±0.5mm, and the main performance indicators should meet the requirements of Table 1.
[0039] Table 1: Main Performance Indicators of Plastic Anchors
[0040]
[0041] The minimum installation temperature for plastic anchors is 0 degrees Celsius.
[0042] In addition to meeting the above requirements, the fabrication and installation of plastic anchors should also comply with the relevant provisions of JG / T366-2012 "Anchors for External Wall Insulation".
[0043] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A special plastic anchor for the maintenance of external wall insulation layers, characterized in that: It includes a metal screw (1) and a plastic expansion sleeve (2). The top of the plastic expansion sleeve (2) is provided with a plastic disc (3). The inside of the plastic expansion sleeve (2) is provided with a cavity (4) to accommodate the metal screw (1). The upper part of the plastic expansion sleeve (2) is a sleeve (5) and the lower part is an anchoring end (6). The sleeve (5) is provided with an injection hole (7) that communicates with the cavity (4). An injection sealing film (8) is provided between the injection hole (7) and the anchoring end (6).
2. The special plastic anchor for exterior wall insulation layer maintenance according to claim 1, characterized in that: The anchoring end (6) is provided with an expansion joint (9) in the middle along its extension direction. The expansion joint (9) divides the anchoring end (6) into several parts. The outer wall of the anchoring end (6) is provided with protrusions and depressions to increase friction.
3. A special plastic anchor for exterior wall insulation layer maintenance according to claim 2, characterized in that: The injection hole (7) is a hole for four interconnected cavities (4), and the whole is cross-shaped.
4. A special plastic anchor for exterior wall insulation layer repair according to claim 3, characterized in that: The glue injection hole (7) is set on the sleeve (5) at a distance of 50mm from the end of the anchor bolt, with a diameter of 2mm or 1.5mm, and the glue injection sealing film (8) has a thickness of 0.5mm.
5. A special plastic anchor for exterior wall insulation layer maintenance according to claim 3, characterized in that: The glue injection holes (7) are arranged in several groups along the sleeve (5) starting 50mm from the end of the anchor bolt. The spacing between each group of glue injection holes (7) is 5mm, and the glue injection holes (7) of adjacent groups are spirally distributed at 45°. The diameter of the glue injection holes (7) is 1mm, and the thickness of the glue injection sealing film (8) is 0.5mm.
6. A special plastic anchor for exterior wall insulation layer repair according to claim 1, characterized in that: The plastic expansion sleeve (2) is made of polyamide, polyethylene or polypropylene.
7. A special plastic anchor for exterior wall insulation layer maintenance according to claim 1, characterized in that: The plastic disc (3) has several circular holes (10).