Tail end expansion embedded steel bar reinforcing structure
By using an end-expansion rebar reinforcement structure with threaded ends and expansion bolts at the ends of the rebars, the problem of instability in rebar reinforcement structures is solved, achieving better anchoring effect and building safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2026-03-20
AI Technical Summary
The existing rebar reinforcement structure and base material are not stable enough, which makes the rebar easy to be pulled out, affecting the reinforcement effect and endangering the safety of the building.
The end-expansion rebar reinforcement structure is adopted. By setting threaded parts and expansion bolts at the ends of the rebars, the expansion bolts expand during rotation to form a tight interlocking structure, increasing the contact area and resistance with the hole wall. Combined with rebar adhesive, the anchoring effect is improved.
It enhances the bond strength and anchoring effect between the rebar and the substrate, thereby improving the stability and safety of rebar reinforcement.
Smart Images
Figure CN224016884U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of anchorage connecting piece for building construction, especially to a terminal expansion anchorage reinforcing structure. BACKGROUND
[0002] With the sustained development of the building industry in China, the area of newly built buildings in China starts to peak, and the reinforcement and reconstruction of existing buildings will become an important business of the building industry. In the reinforcement and reconstruction process, anchorage layer increasing technology is often used to achieve the requirement of changing the use function of the building. The "anchorage" technology is a relatively simple and effective connection and anchoring technology for concrete structures, and is widely used in various aspects of building engineering.
[0003] The existing anchorage is usually drilled on the base material such as concrete, wall rock, etc., then high-strength anchorage glue is injected, and then steel bars or profiles are inserted. After the glue is cured, the steel bars and the base material are bonded together. In the actual construction process, the hole wall is smooth due to the drilling by the drill bit, and the connection between the steel bars and the main body of the building structure completely relies on the anchorage glue. If the anchorage structure is not firmly bonded, the steel bars are very easy to be pulled out, thereby affecting the reinforcement effect and even endangering the overall safety of the building. Therefore, it is particularly urgent to design an anchorage structure that is simple in structure, durable and easy to use. SUMMARY
[0004] Therefore, the utility model provides a terminal expansion anchorage reinforcing structure, which aims to solve the problem of instability of the existing anchorage reinforcing structure and the base material.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a terminal expansion anchorage reinforcing structure, which comprises a steel bar body, a wire tooth part and an expansion screw.
[0006] Preferably, a plurality of expansion screws are included, and the top cap of at least a part of the expansion screws is provided with threads matched with the wire tooth part, and the top cap and the wire tooth part are detachably connected through threads.
[0007] Preferably, one of the expansion screws is arranged at the end of the wire tooth part, and at least one of the expansion screws is arranged at the middle of the wire tooth part.
[0008] Preferably, a fastening screw is further arranged between the expansion screw arranged at the end of the wire tooth part and the expansion screw arranged at the middle of the wire tooth part.
[0009] Preferably, the top cap of the expansion screw arranged at the end of the thread tooth part is not provided with threads, and the top cap of the expansion screw arranged at the middle of the thread tooth part is provided with threads.
[0010] Preferably, the outer diameter of the top cap is greater than the outer diameter of the matching head.
[0011] Preferably, the middle of the expansion petal is provided with a pre-folding angle.
[0012] Preferably, the steel bar body and the thread tooth part are integrally formed.
[0013] Preferably, the length of the thread tooth part is not less than 10 times the diameter of the thread tooth part.
[0014] The beneficial effects of the utility model are:
[0015] The application roughens the local surface of the steel bar by arranging a thread tooth part at the end of the steel bar, the dense thread tooth part can improve the gripping force of the anchoring adhesive and the steel bar, so as to achieve the effect of strengthening the anchoring effect of the steel bar. Secondly, the expansion screw is arranged at the end of the steel bar, so that the expansion screw forms an expanded expansion structure when the application is subjected to a rotating force. The expansion structure is tightly clamped with the hole wall, the tensile area of the top end is increased, the resistance is increased, and the anchoring effect of the steel bar is greatly improved in combination with the anchoring adhesive. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.
[0017] Figure 1 It is a whole structure schematic view of the end expansion anchoring reinforcement structure of the utility model;
[0018] Figure 2 It is a structure schematic view of the expansion screw of the end expansion anchoring reinforcement structure of the utility model;
[0019] Figure 3 It is a whole structure schematic view of another embodiment of the end expansion anchoring reinforcement structure of the utility model;
[0020] Figure 4 It is a structure schematic view of another embodiment of the expansion screw of the end expansion anchoring reinforcement structure of the utility model;
[0021] Figure 5 It is a structure schematic view of still another embodiment of the end expansion anchoring reinforcement structure of the utility model;
[0022] In the drawings:
[0023] 1 - steel body; 2 - thread tooth part; 3 - expansion screw; 31 - top cap; 32 - expansion petal; 33 - matching head; 34 - pre-angled corner. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0025] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 a limitation on the present application.
[0026] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] Reference Figures 1-5 , shows a terminal expansion reinforcing structure, including steel body 1, thread tooth part 2 and expansion screw 3, steel body 1 and thread tooth part 2 are connected, expansion screw 3 includes top cap 31, expansion petal 32 and matching head 33, expansion petal 32 connects top cap 31 and matching head 33, and matching head 33 is detachably connected with thread tooth part 2 through threads.
[0028] The present application preferably processes the steel bar conforming to the specification through the steel bar thread rolling machine, processes the head of the steel bar into threads, and then fits into the expansion screw 3. The advantage of this method is that the steel body 1 and the thread tooth part 2 are both processed in one steel bar, and the integrity and bending resistance are good. Of course, the steel body 1 and the thread tooth part 2 can also be separately processed, and then connected together through high-speed rotating hot fusion technology.
[0029] The wire teeth 2 are formed by roughening the surface of the steel bar, and the dense wire teeth can increase the gripping force of the anchoring adhesive and the steel bar, so as to achieve the effect of strengthening the anchoring of the steel bar.
[0030] The expansion principle of the expansion screw 3 of the present application is that when the steel bar body 1 rotates, the top cap 31 of the expansion screw 3 arranged at the end of the wire teeth 2 abuts against the wire teeth 2 and stops advancing, but the matching head 33 has threads, and when the steel bar body 1 rotates, it will further advance to extrude the expansion petals 32.
[0031] The use of the present application is to drill a hole of appropriate size on a substrate such as concrete, wall rock, etc., inject anchoring adhesive, and insert the end expansion anchoring reinforcement structure into the hole, rotate the steel bar body 1 to make the expansion screw 3 bear stress, and the expansion petals 32 will be extruded and spread outward, forming a large-diameter expansion expansion screw 3. The expansion petals 32 will be tightly clamped with the hole wall, increasing the tensile area of the top end and increasing the resistance, and in combination with the anchoring adhesive, the anchoring effect of the steel bar is greatly improved.
[0032] In some embodiments, as shown in Figure 5 The end expansion anchoring reinforcement structure includes a plurality of expansion screws 3, and the top cap 31 of at least a part of the expansion screws 3 is provided with threads matched with the wire teeth 2, and the top cap 31 and the wire teeth 2 are detachably connected through threads. By increasing the number of expansion screws 3, a plurality of expansion structures will be formed after rotation, further enhancing the reinforcement effect of the end expansion anchoring reinforcement structure and the substrate such as concrete, wall rock, etc.
[0033] In some preferred embodiments, as shown in Figure 5As shown, at least one expansion screw 3 is arranged at the end of the barb portion 2, and at least one expansion screw 3 is arranged at the middle of the barb portion 2. In this way, at least two expansion screws 3 are arranged in the end expansion anchorage structure, and two expansion structures are formed. This method is economical and can achieve good reinforcement effect. Specifically, the top cap 31 of the expansion screw 3 arranged at the end of the barb portion 2 is not provided with threads, and the top cap 31 of the expansion screw 3 arranged at the middle of the barb portion 2 is provided with threads. When the steel bar is rotated, the top cap 31 of the expansion screw 3 arranged at the end of the barb portion 2 is not provided with threads, and the steel bar will not further advance when the top cap 31 is reached during rotation, but the matching head 33 is provided with threads and will further advance to extrude the expansion petals 32, so that an expansion structure can be finally obtained at the end of the barb portion 2. For the expansion screw 3 at the middle of the barb portion 2, there are two expansion methods: in the first case, the top cap 31 of the expansion screw 3 at the middle of the barb portion 2 will stop advancing due to the resistance of the barb portion 2, but the matching head 33 is provided with threads and will further advance to extrude the expansion petals 32, forming an expansion structure; in the second case, the top cap 31 of the expansion screw 3 at the middle of the barb portion 2 will continuously advance until it abuts against the expansion screw 3 at the end, and the expansion screw 3 at the end will hinder the advance of the top cap 31 of the expansion screw 3 at the middle, at this time the matching head 33 continuously advances to extrude the expansion petals 32, forming an expansion structure.
[0034] In some embodiments, a fastening screw is arranged between the expansion screw 3 arranged at the end of the barb portion 2 and the expansion screw 3 arranged at the middle of the barb portion 2. Due to the existence of the second case described above, in order to avoid all expansion screws 3 being formed at the end, a fastening screw can be installed at the position where an expansion structure is needed. The existence of the fastening screw will hinder the advance of the top cap 31 of the expansion screw 3 at the middle, and finally extrude the expansion petals 32 at the fastening screw, forming an expansion structure.
[0035] In some embodiments, as shown in the drawings, Figures 1-2 The outer diameter of the top cap 31 is greater than the outer diameter of the matching head 33. This can facilitate the smooth advance of the expansion screw 3 at the end. If the outer diameter of the matching head 33 is greater than the outer diameter of the top cap 31, during the advance process, if the hole is too small, the matching head 33 and the top cap 31 will pull the expansion petals 32 in the middle, and even cause damage to the expansion petals 32. However, if the outer diameter of the top cap 31 is greater than the outer diameter of the matching head 33, the size of the hole can be tested by the top cap 31 with a larger diameter. If the top cap 31 with a larger diameter can pass through the hole, the matching head 33 can also pass through the hole. In addition, when the end of the barb portion 2 abuts against the top cap 31, the barb portion 2 will provide a force to the top cap 31 to resist the resistance of the hole to the top cap 31, so as to avoid the expansion screw 3 from being prematurely expanded due to resistance.
[0036] In some embodiments, as shown in the drawings, Figure 2As shown, the middle part of the expansion petal 32 is provided with a pre-folding angle 34. The pre-folding angle 34 is arranged to facilitate the folding expansion of the expansion screw 3 along the preset position, and can also ensure that the expansion structure has a larger expansion diameter.
[0037] In some embodiments, as shown, Figure 1 As shown, the reinforcing bar body 1 and the thread part 2 are integrally formed. As described above, the integrally formed end expansion reinforcing structure is formed by processing the reinforcing bar through a reinforcing bar thread rolling machine, processing the head of the reinforcing bar into a thread, and then sleeving the expansion screw 3. The advantage of this method is that the reinforcing bar body 1 and the thread part 2 are both processed from a reinforcing bar, and the integrity and bending resistance are better.
[0038] In some embodiments, the length of the thread part 2 is not less than 10 times the diameter of the thread part 2. The end expansion reinforcing structure needs to embed the thread part 2 into the base material such as concrete, wall rock, etc. According to the experimental results, when the length of the thread part 2 is not less than 10 times the diameter of the thread part 2, better bending resistance can be obtained, the processing difficulty is smaller, and the reinforcing structure can also meet better stability.
[0039] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A rebar reinforcement structure with end expansion joints, characterized in that, It includes a steel bar body, a threaded portion, and an expansion bolt. The steel bar body and the threaded portion are connected. The expansion bolt includes a top cap, an expansion petal, and a matching head. The expansion petal connects the top cap and the matching head. The matching head is detachably connected to the threaded portion via a thread.
2. The end-expansion rebar reinforcement structure according to claim 1, characterized in that, The device includes a plurality of expansion screws, at least a portion of which have caps with threads that match the threaded portion, and the caps and the threaded portion are detachably connected by the threads.
3. The end-expansion rebar reinforcement structure according to claim 2, characterized in that, One of the expansion screws is disposed at the end of the threaded portion, and at least one of the expansion screws is disposed in the middle of the threaded portion.
4. The end expansion rebar reinforcement structure according to claim 3, characterized in that, A fastening screw is also provided between the expansion screw located at the end of the threaded portion and the expansion screw located in the middle of the threaded portion.
5. The end-expansion rebar reinforcement structure according to claim 3, characterized in that, The top cap of the expansion screw disposed at the end of the threaded portion is not threaded, while the top cap of the expansion screw disposed in the middle of the threaded portion is threaded.
6. The end expansion rebar reinforcement structure according to claim 1, characterized in that, The outer diameter of the top cap is larger than the outer diameter of the matching head.
7. The end expansion rebar reinforcement structure according to claim 1, characterized in that, The expanded petals have a pre-folded angle in the middle.
8. The end expansion rebar reinforcement structure according to claim 1, characterized in that, The main body of the steel bar and the threaded part are integrally formed.
9. A rebar reinforcement structure with end expansion joints according to any one of claims 1 to 7, characterized in that, The length of the threaded portion is not less than 10 times the diameter of the threaded portion.