Composite epoxy embedded steel bar glue integrated expanded-base mechanical anchor bolt and design process thereof

Abstract

The invention discloses a composite epoxy embedded steel bar glue integrated expanded-base mechanical anchor bolt and a design process thereof, and aims to solve the problem that the stability of a building structure becomes poor due to the fact that the connection strength between an existing expanded-base mechanical anchor bolt and a concrete hole wall is reduced when the existing expanded-base mechanical anchor bolt is located in a humid environment for a long time. The expansion screw comprises a screw rod and a sleeve, wherein the sleeve comprises a pipe body and a plurality of expansion pieces; a plurality of sections of glue storage grooves are formed in the outer wall of the pipe body, and a through flow guide hole is formed in each section of glue storage groove; the performance application of the expanded-base mechanical anchor bolt and the performance application of the embedded steel bar glue are integrally synthesized, and after the composite epoxy embedded steel bar glue is applied to the expanded-base mechanical anchor bolt, the performance advantages of the expanded-base mechanical anchor bolt and the embedded steel bar glue are mutually combined by utilizing the characteristics of sealing, curing and fastening of the embedded steel bar glue, so that the bonding strength and the sealing and curing performance of the anchor bolt are improved; and the stability and durability of the anchor bolt in various complex environments are enhanced, so that the connection strength between the anchor bolt and the concrete hole wall is improved, the service life of the anchor bolt is prolonged, and the stability of a building is enhanced.

Description

Technical Field

[0001] The present application relates to the field of anchor bolt technology, and in particular to a composite epoxy anchoring glue integrated bottom-expanded mechanical anchor bolt and its design process. Background Art

[0002] Mechanical anchor bolts are components that are anchored to the concrete substrate by the friction between the anchor bolt and the drilled hole or the locking key effect. The main load-bearing parts are composed of fasteners (screws, nuts, washers), cone heads, expanders, etc. made of metal materials.

[0003] However, in complex environments like super-high-rise buildings, underground structures, and coastal structures, existing expanded-bottom mechanical anchors may not be able to effectively handle the harsh conditions of dynamic tides, high salinity, high alkalinity, and extreme cold. For example, in the humid environments of subway tunnels, the tidal environments of docks and bridge piers, and the high-temperature, high-salt, high-alkalinity, and high-cold desert environments of the Kingdom of Saudi Arabia in the Middle East, anchors are susceptible to oxidation, weathering, and desertification, leading to reduced performance and shortened service life. For example, in coastal seawalls, which are exposed to long-term humidity and tidal conditions, existing anchors are susceptible to seawater corrosion, which reduces the connection strength between the anchor and the concrete hole wall and affects the stability of the building structure.

[0004] Although traditional expanded-bottom mechanical anchor bolts can be tightened quickly, they still have shortcomings: for example, the anchor bolts will leak air after tightening. If they are exposed to tidal moisture, tidal high temperature, and tidal high-alkali and high-acid substances in a tidal environment for a long time, the concrete hole walls will become sandy, aged, and weathered, which will easily lead to performance degradation, structural damage, shortened lifespan, and other problems, affecting the stability of the building structure. Summary of the Invention

[0005] To this end, the present application provides an integrated expanded bottom mechanical anchor bolt with composite epoxy anchoring glue and its design process to solve the problem that the connection strength between the existing expanded bottom mechanical anchor bolt and the concrete hole wall is reduced due to being in a humid environment for a long time, resulting in poor stability of the building structure.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] In a first aspect, a composite epoxy anchoring adhesive integrated bottom-expanded mechanical anchor bolt comprises: a screw and a sleeve designed on the screw, one end of the screw being integrally provided with a conical expansion head, and the other end being sleeved with a flat washer, a spring washer, and a nut threadedly connected thereto;

[0008] The sleeve includes a tube body and a plurality of expansion pieces arranged at one end of the tube body, and the plurality of expansion pieces are located at one end close to the conical expansion head; the outer wall of the tube body is provided with a plurality of glue storage grooves at intervals along the length direction, and each of the glue storage grooves is provided with a through-flow guide hole, the glue storage grooves are used to store the composite epoxy anchor glue, and the through-flow guide holes are used to guide the composite epoxy anchor glue to flow between the sleeve and the screw;

[0009] Also included is a power tool for installing the sleeve.

[0010] Optionally, each section of the glue storage tank is distributed in a ring shape along the transverse direction of the outer wall of the tube body.

[0011] Optionally, the electric tool includes a conversion tool and an electric hammer, and the electric hammer is connected to the sleeve through the conversion tool.

[0012] Optionally, the conversion tool includes a conversion body, the conversion body is a hollow tubular structure, and the inner diameter of the conversion body is larger than the outer diameter of the screw, and the outer diameter of the conversion body is smaller than or equal to the outer diameter of the tube body;

[0013] One end of the conversion body is provided with an alignment block, the end of the tube body away from the expansion piece is provided with an alignment groove used in conjunction with the alignment block, and the other end of the conversion body is provided with a docking groove for connecting the electric hammer.

[0014] Optionally, the spring washer is installed between the flat washer and the nut.

[0015] Optionally, the flat gasket is a circular gasket;

[0016] The nut is an external hexagonal or internal hexagonal nut.

[0017] In a second aspect, a design process for a composite epoxy rebar-anchoring adhesive integrated bottom-enlarged mechanical anchor bolt adopts the composite epoxy rebar-anchoring adhesive integrated bottom-enlarged mechanical anchor bolt, comprising the following steps:

[0018] Step 1: Drill holes on the concrete surface according to the designed diameter and depth;

[0019] Step 2: Clean the hole to ensure there is no residual dust in the hole;

[0020] Step 3: Load the glue tube filled with colloid into the special glue gun. The colloid is a composite epoxy rebar glue. Start injecting glue. Aim the glue injection port of the glue gun at the bottom of the target hole and slowly inject the glue to make the glue fully contact the concrete wall in the hole.

[0021] Step 4: Use an electric tool to rotate the expanded bottom mechanical anchor bolt in the same direction and insert it into the bottom of the hole to ensure that the colloid fully and evenly wraps the concrete hole wall and the expanded bottom mechanical anchor bolt; after the expanded bottom mechanical anchor bolt expands, tighten it quickly, and after the composite epoxy anchor glue is cured, it is sealed and tightened. Then, put the gasket on the other end of the screw rod and screw in the nut to fix it.

[0022] Optionally, in step 4,

[0023] First, place the end of the screw with the conical expansion head toward the hole, and place the end of the sleeve with the expansion piece toward the hole and onto the screw;

[0024] Next, the casing is pushed with an electric tool, so that the screw and casing are driven into the concrete hole as a whole, and until the expansion piece is close to the conical expansion head. The casing is further driven with the electric tool, so that the expansion piece expands outward along the conical surface of the conical expansion head. The casing is fixed to the screw by the compression between the expansion piece and the concrete hole wall. While applying pressure, the composite epoxy rebar adhesive in the concrete hole is in a flowing liquid state and can be extended and cured on the concrete hole wall, the outer wall of the casing, the inner wall of the casing and the outer wall of the screw to achieve sealing.

[0025] Finally, put the flat washer and spring washer on the other end of the screw in sequence, and tighten the nut to fix it.

[0026] Compared with the prior art, this application has at least the following beneficial effects:

[0027] 1. The present application sets multiple sections of glue storage tanks on the outer wall of the casing body, and each section of the glue storage tank is provided with a through-guide hole. The glue storage tank is used to store the composite epoxy rebar embedding glue, and the through-guide hole is used to guide the composite epoxy rebar embedding glue into the gap between the casing and the screw, and flow between the casing and the screw, thereby ensuring that the colloid can fully and evenly cover the surface of the screw and the inner wall of the casing, thereby improving the bonding effect and sealing and curing performance; the present application integrates the performance of the expanded bottom mechanical anchor bolt and the performance of the rebar embedding glue. After the composite epoxy rebar embedding glue is applied to the expanded bottom mechanical anchor bolt, the sealing, curing and fastening characteristics of the rebar embedding glue are utilized to combine the performance advantages of the two, thereby realizing the casing The bonding, sealing and curing between the casing and the concrete hole wall is tightened, and the sealing and curing effect between the casing and the screw is further enhanced through the through-drain holes between the casing and the screw, thereby significantly improving the overall bonding strength, sealing and curing performance and overall force-bearing capacity of the anchor bolt, and enhancing its stability and durability in various complex environments. This technology has a good use effect in complex environments such as coastal sea defense dams, water retaining dams, offshore wind power, offshore solar energy, and underground nuclear energy equipment installation; at the same time, it has the advantages of quick, efficient, safe and reliable installation, which improves the connection strength between the anchor bolt and the concrete hole wall, extends the service life of the anchor bolt, and enhances the overall stability of the building.

[0028] 2. This application uses electric tools when installing the bottom-enlarged mechanical anchor bolts, which makes the operation convenient and quick, and improves the installation efficiency.

[0029] 3. During the manufacturing process, the sleeves are designed into different specifications and models based on the design parameters of the glue storage tank and the through-hole guide holes to meet the needs of different application scenarios. When using, the corresponding specifications and models are directly selected according to different application scenarios and needs to achieve the best use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing the present application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components).

[0031] Figure 1 A schematic diagram of the structure of a composite epoxy anchoring adhesive integrated bottom-enlarged mechanical anchor provided in one embodiment of the present application;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure of the middle screw;

[0033] Figure 3 for Figure 1 Schematic diagram of the structure of the middle casing;

[0034] Figure 4 for Figure 3 Cross-sectional view of the middle expansion sheet;

[0035] Figure 5 A schematic diagram of the structure of a conversion tool provided in one embodiment of the present application;

[0036] Figure 6 This is a diagram showing the installation status of a composite epoxy anchoring adhesive integrated bottom-enlarged mechanical anchor provided in one embodiment of the present application;

[0037] Figure 7 Schematic diagram of the completed installation of the composite epoxy anchor glue integrated bottom-expanded mechanical anchor provided in one embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1. Screw; 11. Conical expansion head; 2. Casing; 21. Tube body; 22. Expansion plate; 23. Glue storage tank; 24. Through-hole guide hole; 25. Alignment groove; 3. Flat washer; 4. Spring washer; 5. Nut;

[0040] 6. Conversion tool; 61. Conversion body; 62. Alignment block; 63. Docking groove; 7. Concrete. DETAILED DESCRIPTION

[0041] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0042] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0043] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the convenience of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0044] Reference Figure 1-Figure 7 A composite epoxy rebar-anchoring adhesive integrated bottom-expanded mechanical anchor bolt comprises: a screw 1 and a sleeve 2 designed on the screw 1. One end of the screw 1 is integrally provided with a conical expansion head 11, and the other end is sleeved with a flat washer 3, a spring washer 4, and a nut 5 threadedly connected to the screw 1. The sleeve 2, the flat washer 3, and the spring washer 4 can slide freely along the screw 1, and the nut 5 is used in conjunction with the screw 1 thread.

[0045] The sleeve 2 includes a tube body 21 and a plurality of expansion sheets 22 arranged at one end of the tube body 21, and the plurality of expansion sheets 22 are located at one end close to the conical expansion head 11, and the expansion sheets 22 can expand outward along the conical expansion head 11; the outer wall of the tube body 21 is provided with a plurality of glue storage grooves 23 at intervals along the length direction, and each glue storage groove 23 is provided with a through-guide hole 24.

[0046] Also included is a power tool for installing the 2-piece head of the casing.

[0047] Preferably, each section of the glue storage groove 23 is distributed in a ring shape along the transverse direction of the outer wall of the tube body 21, that is, forming an annular groove.

[0048] In actual application, the cross-guiding holes 24 arranged in the glue storage tank 23 can ensure that the colloid fully and evenly wraps the surface of the screw 1 and the inner wall of the sleeve 2. Specifically, the glue storage tank 23 is used to store a certain amount of colloid (composite epoxy rebar embedding glue) and evenly distribute the colloid during the glue injection process; the composite epoxy rebar embedding glue is guided into the gap between the sleeve 2 and the screw 1 through the cross-guiding holes 24, and flows between the sleeve 2 and the screw 1, ensuring that the colloid can fully and evenly cover the surface of the screw 1 and the inner wall of the sleeve 2, thereby improving the bonding effect and sealing and curing performance.

[0049] In addition, the number, length, width of the glue storage tanks 23 and the number and aperture size of the through-flow guide holes 24 will affect the distribution and flow of the colloid, thereby affecting the bonding effect and sealing and curing performance of the anchor bolt. According to the design parameters of the glue storage tanks 23 and the through-flow guide holes 24, the sleeve 2 can be divided into different specifications and models to meet the needs of different application scenarios. Among them: according to the number, length and width of the glue storage tanks 23, the sleeve 2 can be divided into different specifications and models, corresponding to different glue storage amounts; by setting the through-flow guide holes 24 in each section of the glue storage tank 23, the sleeve 2 can be further divided into different specifications and models according to the number and aperture size of the guide holes, corresponding to different diversion efficiencies. When in use, according to different application scenarios and needs, you can choose the corresponding specifications and models to achieve the best use effect.

[0050] The electric tool comprises a conversion tool 6 and an electric hammer, and the electric hammer is connected to the sleeve 2 via the conversion tool 6 .

[0051] Furthermore, the conversion tool 6 includes a conversion body 61. The conversion body 61 is a hollow tubular structure, and the inner diameter of the conversion body 61 is larger than the outer diameter of the screw 1, ensuring that the conversion tool 6 can be smoothly sleeved on the screw 1 and will not interfere with the screw 1 during the installation process. At the same time, the outer diameter of the conversion body 61 is less than or equal to the outer diameter of the tube body 21 of the sleeve 2, so that the conversion body 61 can smoothly enter the concrete hole and install the sleeve 2;

[0052] A positioning block 62 is provided at one end of the conversion body 61, and an alignment groove 25 used in conjunction with the positioning block 62 is provided at the end of the tube body 21 away from the expansion piece 22. The other end of the conversion body 61 is provided with a docking groove 63, which is used to achieve connection with the electric hammer.

[0053] Reference Figure 6When installing the sleeve 2, align the alignment block 62 on the conversion body 61 with the alignment groove 25 on the tube body 21, and then use the electric hammer to drive the conversion tool 6 and the sleeve 2 to advance and rotate, so that the sleeve 2 is pushed toward the concrete hole. When one end of the expansion piece 22 of the sleeve 2 reaches the end of the screw 1 close to the conical expansion head 11, continue to push the conversion tool 6, and the expansion piece 22 will gradually expand outward along the conical surface of the conical expansion head 11.

[0054] Preferably, the spring washer 4 is installed between the flat washer 3 and the nut 5, as shown in FIG. Figure 1 shown.

[0055] Further preferably, the flat washer 3 is a circular washer; and the nut 5 is an external hexagonal or internal hexagonal nut.

[0056] The present application also provides a design process for a composite epoxy rebar-anchoring adhesive integrated bottom-enlarged mechanical anchor bolt, which uses the composite epoxy rebar-anchoring adhesive integrated bottom-enlarged mechanical anchor bolt, comprising the following steps:

[0057] Step 1: Drill holes on the surface of concrete 7 according to the designed diameter and depth;

[0058] Step 2: Clean the hole to ensure there is no residual dust in the hole;

[0059] Step 3: Load the glue tube filled with the composite epoxy rebar glue into the special glue gun; start injecting the glue, aim the glue injection port of the glue gun at the bottom of the target hole, and slowly inject the glue to make the glue fully contact the concrete wall in the hole, ensuring that the glue can evenly cover the surface of the concrete wall in the hole;

[0060] Step 4: Use an electric tool to rotate the bottom-expanded mechanical anchor bolt in the same direction and insert it into the bottom of the hole to ensure that the colloid fully and evenly wraps the concrete hole wall and the bottom-expanded mechanical anchor bolt; after the bottom-expanded mechanical anchor bolt expands, tighten it quickly, and after the composite epoxy anchor glue is cured, it will achieve sealing and curing, and the resulting integrated structure will have stronger tensile and shear resistance; then put a gasket on the other end of the screw 1 and screw in the nut 5 to fix it.

[0061] In step 4 above, the specific installation steps of the expanded bottom mechanical anchor are as follows:

[0062] First, place the end of the screw 1 with the conical expansion head 11 toward the hole, and place the end of the sleeve 2 with the expansion piece 22 toward the hole on the screw 1.

[0063] Next, use an electric tool to push the sleeve 2. Specifically, first align the alignment block 62 on one end of the conversion tool 6 with the alignment groove 25 on the sleeve body 21, and then connect the electric hammer on the end of the conversion tool 6 with the docking groove 63.

[0064] Then, start the electric hammer and push the sleeve 2 through the conversion tool 6, so that the screw 1 and the sleeve 2 are driven into the concrete hole as a whole until the expansion piece 22 is close to the conical expansion head 11; continue to use the electric hammer to drive the sleeve 2, so that the expansion piece 22 expands outward along the conical surface of the conical expansion head 11. As the sleeve 2 is advanced, the conical surface of the conical expansion head 11 will gradually squeeze the expansion piece 22, causing it to open outward and come into close contact with the concrete hole wall. The sleeve 2 is fixed on the screw 1 by relying on the extrusion between the expansion piece 22 and the concrete hole wall; while applying pressure, the composite epoxy anchor glue (two-component anchor glue) two-component anchor glue can be in the concrete hole in a flowing liquid state. The wall, outer wall of the casing, inner wall of the casing and outer wall of the screw are extended and sealed and cured, ensuring the bonding and sealing between the expanded bottom mechanical anchor casing and the concrete hole wall, and the casing and the screw are sealed and cured by the rebar glue due to the setting of the through-guide hole 24, and then cured, which further enhances the bonding and sealing effect; the integrated structural anchor bolt produced in this way has the advantages of stronger, more stable, more durable and safer in terms of tensile and shear resistance, significantly improving the overall bearing capacity of the anchor bolt, reducing the long-term impact of the tidal environment on the anchor bolt, and also achieving a fast and efficient installation process and long-term durability, thereby improving overall safety;

[0065] Finally, the flat washer 3 and the spring washer 4 are sequentially put on the other end of the screw rod 1, and the nut 5 is tightened to fix it; the secondary tightening is achieved by the nut 5, which can significantly enhance the sealing and durability of the anchor bolt.

[0066] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A composite epoxy anchoring adhesive integrated bottom-expanded mechanical anchor bolt, comprising: A screw and a sleeve designed on the screw, one end of the screw is integrally provided with a conical expansion head, and the other end is sleeved with a flat washer, a spring washer and a nut threadedly connected thereto; characterized in that, The sleeve includes a tube body and a plurality of expansion pieces arranged at one end of the tube body, and the plurality of expansion pieces are located at one end close to the conical expansion head; the outer wall of the tube body is provided with a plurality of glue storage grooves at intervals along the length direction, and each of the glue storage grooves is provided with a through-flow guide hole, the glue storage grooves are used to store the composite epoxy anchor glue, and the through-flow guide holes are used to guide the composite epoxy anchor glue to flow between the sleeve and the screw; Also included is a power tool for installing the sleeve.

2. The composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: Each section of the glue storage groove is distributed in a ring shape along the transverse direction of the outer wall of the tube body.

3. The composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The electric tool comprises a conversion tool and an electric hammer, and the electric hammer is connected to the sleeve through the conversion tool.

4. The composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor according to claim 3 is characterized in that: The conversion tool includes a conversion body, which is a hollow tubular structure, and the inner diameter of the conversion body is larger than the outer diameter of the screw, and the outer diameter of the conversion body is smaller than or equal to the outer diameter of the tube body; One end of the conversion body is provided with an alignment block, the end of the tube body away from the expansion piece is provided with an alignment groove used in conjunction with the alignment block, and the other end of the conversion body is provided with a docking groove for connecting the electric hammer.

5. The composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor bolt according to claim 1, characterized in that: The spring washer is installed between the flat washer and the nut.

6. The composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor according to claim 5, characterized in that: The flat gasket is a circular gasket; The nut is an external hexagonal or internal hexagonal nut.

7. A design process for a composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor bolt, characterized in that: The method of using the composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor bolt according to any one of claims 1 to 6 comprises the following steps: Step 1: Drill holes on the concrete surface according to the designed diameter and depth; Step 2: Clean the hole to ensure there is no residual dust in the hole; Step 3: Load the glue tube filled with colloid into the special glue gun. The colloid is a composite epoxy rebar glue. Start injecting glue. Aim the glue injection port of the glue gun at the bottom of the target hole and slowly inject the glue to make the glue fully contact the concrete wall in the hole. Step 4: Use an electric tool to rotate the expanded bottom mechanical anchor bolt in the same direction and insert it into the bottom of the hole to ensure that the colloid fully and evenly wraps the concrete hole wall and the expanded bottom mechanical anchor bolt; after the expanded bottom mechanical anchor bolt expands, tighten it quickly, and after the composite epoxy anchor glue is cured, it is sealed and tightened. Then, put the gasket on the other end of the screw rod and screw in the nut to fix it.

8. The design process of the composite epoxy anchoring glue integrated bottom-enlarged mechanical anchor according to claim 7 is characterized in that: In step four, First, place the end of the screw with the conical expansion head toward the hole, and place the end of the sleeve with the expansion piece toward the hole and onto the screw; Next, the casing is pushed with an electric tool, so that the screw and casing are driven into the concrete hole as a whole, and until the expansion piece is close to the conical expansion head. The casing is further driven with the electric tool, so that the expansion piece expands outward along the conical surface of the conical expansion head. The casing is fixed to the screw by the compression between the expansion piece and the concrete hole wall. While applying pressure, the composite epoxy rebar adhesive in the concrete hole is in a flowing liquid state and can be extended and cured on the concrete hole wall, the outer wall of the casing, the inner wall of the casing and the outer wall of the screw to achieve sealing. Finally, put the flat washer and spring washer on the other end of the screw in sequence, and tighten the nut to fix it.

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