Expansion bolt with high durability

Abstract

The utility model relates to the technical field of expansion bolts, in particular to an expansion bolt with strong durability, which adopts the technical scheme that the expansion bolt comprises a pre-embedded component, a positioning component penetrates through the pre-embedded component, the pre-embedded component comprises a sleeve, limiting bulges are arranged on the top of the outer wall of the sleeve in an annular array, an annular baffle is arranged on the outer side of the bottom of the sleeve, and the annular baffle is arranged on the outer side of the bottom of the sleeve. Grouting holes are formed in the annular baffle and tightly attached to the sleeve in an annular array mode. The expansion bolt has the advantages of effectively preventing water vapor from permeating, reducing the corrosion risk of the bolt, guaranteeing the stable structure and prolonging the service life, and solves the problems that after a traditional expansion bolt is inserted into a drill hole to be fixed, the connecting position of the surface of the expansion bolt and the drill hole cannot be completely sealed, water is prone to entering, the bolt is eroded by water vapor, and the structure is damaged.

Description

Technical Field

[0001] This utility model relates to the field of expansion bolt technology, specifically a durable expansion bolt. Background Technology

[0002] Expansion bolts are frequently used in home renovations and plumbing / electrical installations. They are simple in structure and easy to use. A special threaded connector is used to fix pipes, supports, or equipment to walls, floors, or columns. Generally, an expansion bolt consists of a threaded rod, a sleeve, and a nut. To use it, a hole is drilled in the fixing body using an impact drill. The sleeve is then placed on the threaded rod, and both the sleeve and the threaded rod are inserted into the drilled hole. After tightening the nut, the threaded rod, sleeve, mounting components, and fixing body expand and become securely fastened as a single unit.

[0003] Extensive research revealed CN208858717U, which discloses a durable expansion bolt. Its structure includes a nut, a galvanized screw, an externally threaded rod, a spring washer, a sleeve, a bolt, and an inner cylinder. The galvanized screw has an externally threaded rod surface, and a nut is attached to the outside of the galvanized screw. The nut is detachably connected to the galvanized screw via the externally threaded rod. A spring washer is located at the bottom of the nut. A sleeve is located at the bottom of the galvanized screw, and an inner cylinder is located inside the sleeve. One end of the galvanized screw extends into the inner cylinder, and a fixing seat is located at the bottom of the inner cylinder. The fixing seat is connected to the sleeve and the galvanized screw via the inner cylinder. A bolt is located at the bottom of the sleeve. In this prior art, the galvanized screw and inner cylinder in the device enhance the corrosion resistance of the expansion bolt, preventing rust and allowing for long-term use. Furthermore, the sleeve inside the expansion bolt is less prone to severe wear during use, resulting in a highly durable expansion bolt.

[0004] However, in actual use, after the expansion bolt is inserted into the drilled hole, it is mainly fixed to the fixed object by expansion. But after fixing, the connection between the surface of the expansion bolt and the drilled hole cannot be completely sealed, which creates conditions for moisture to enter. Once moisture seeps in, the expansion bolt is easily corroded, resulting in rust, which in turn damages the structure and affects its normal use and service life. Therefore, there is an urgent need to develop a more durable expansion bolt to effectively solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a durable expansion bolt that effectively prevents water vapor infiltration, reduces the risk of bolt corrosion, thereby ensuring structural stability and extending service life. It solves the problem that after traditional expansion bolts are inserted into drill holes for fixing, the connection between the bolt surface and the drill hole cannot be completely sealed, making it easy for water to enter and causing the bolt to be corroded by water vapor and damaged.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a durable expansion bolt, comprising a pre-embedded component, wherein a positioning component passes through the pre-embedded component, the pre-embedded component comprising a sleeve, wherein the top of the outer wall of the sleeve is provided with limiting protrusions in a ring array, and the bottom outer side of the sleeve is provided with a ring baffle, wherein grouting holes are provided in a ring array close to the sleeve on the ring baffle.

[0007] Preferably, the top of the sleeve has expansion joints arranged in a ring array, and the depth of the expansion joints is half the height of the sleeve.

[0008] In the design, the top of the casing has an expansion joint with a depth of half the height of the casing in a ring array. This allows the top to deform under the pressure of the top block when the casing is inserted into the borehole and tightened during installation. This results in better fit with the inner wall of the borehole, improving the compatibility and installation stability between the casing and the fixing body.

[0009] Preferably, the longitudinal section of the limiting protrusion adopts a triangular structure design, and the bottom of the limiting protrusion is an acute angle.

[0010] In the design, the limiting protrusion adopts a structural design with a triangular longitudinal section and an acute angle at the bottom, which can effectively increase the resistance during tightening and adjustment, thereby preventing the sleeve from coming out of the drill hole in the opposite direction and enhancing the stability of the pre-embedded components after installation.

[0011] Preferably, the outer wall of the sleeve above the annular baffle is provided with a positioning external thread, the depth of which matches the width of the top of the limiting protrusion, and the height of which is half the height of the sleeve.

[0012] In the design, the outer wall of the sleeve above the annular baffle is provided with a positioning external thread, and the depth of the positioning external thread matches the top width of the limiting protrusion, and the height is half the height of the sleeve. This allows the contact surface to be increased through the positioning external thread after grouting, thereby further stabilizing the position of the positioning sleeve and making the grouting more complete.

[0013] Preferably, the positioning component includes a positioning rod, the bottom of the outer wall of the positioning rod is provided with an external thread and an adjusting nut is threadedly installed thereon, the top of the positioning rod is provided with a top block, and the outer diameter of the positioning rod is smaller than the inner diameter of the sleeve.

[0014] In the design, the bottom of the outer wall of the positioning rod of the positioning component is threaded with an external thread and an adjusting nut is installed. A top block is provided at the top. The outer diameter of the positioning rod is smaller than the inner diameter of the sleeve. This allows the positioning rod to be flexibly adjusted in the sleeve by rotating the adjusting nut. The top block can provide support and expansion for the inside of the sleeve, thereby enhancing the fastening effect and durability of the entire expansion bolt.

[0015] Preferably, a washer is movably fitted on the positioning rod above the adjusting nut, and the outer diameter of the washer matches the outer diameter of the annular baffle.

[0016] In the design, a washer with an outer diameter matching the outer diameter of the annular baffle is mounted on the positioning rod above the adjusting nut. This allows the washer to evenly distribute pressure when the adjusting nut is tightened, preventing the adjusting nut from directly acting on the annular baffle and causing damage. This extends the service life of the expansion bolt and related components, improves overall durability, and can also seal the grouting hole.

[0017] Preferably, the top block adopts a frustum-shaped structure design, and the cross-sectional dimension of the top of the top block is larger than the inner diameter of the sleeve.

[0018] In the design, the top block adopts a frustum-shaped structure with a top cross-sectional dimension larger than the inner diameter of the sleeve. This allows the top block to more effectively support and expand the internal space of the sleeve during the retraction of the positioning rod, further enhancing the tightness of the connection between the sleeve and the fixing body, and improving the fixing effect and durability of the expansion bolt.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This utility model achieves the effects of effectively preventing water vapor infiltration, reducing the risk of bolt corrosion, ensuring structural stability, and extending service life by setting sleeves, limiting protrusions, annular baffles, and grouting holes in the pre-embedded components.

[0021] During installation, the casing is inserted into the drill hole, and filling material is injected through the grouting hole. After the filling material solidifies, it not only enhances the connection stability between the bolt and the fixing body, but also forms a seal between the casing and the drill hole wall, greatly reducing the possibility of water vapor penetration and thus reducing the risk of bolt corrosion.

[0022] Meanwhile, the limiting protrusions arranged in a ring array on the top of the outer wall of the casing can effectively increase resistance during tightening and adjustment, preventing the casing from coming out of the borehole in the reverse direction and ensuring the stability of the structure.

[0023] The annular baffle is set close to the sleeve, which plays an auxiliary supporting role and guides the uniform distribution of the filling material during the injection process, further improving the sealing and connection effect, thereby extending the service life of the expansion bolt. It solves the problem that after the traditional expansion bolt is inserted into the drill hole for fixing, the surface of the bolt cannot be completely sealed at the connection with the drill hole, which makes it easy for water to enter and cause the bolt to be corroded by water vapor and damaged. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0025] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 3This is a schematic diagram of the embedded component structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the positioning component structure of this utility model.

[0028] In the diagram: 1. Embedded component; 11. Sleeve; 111. Positioning external thread; 112. Expansion joint; 113. Limiting protrusion; 12. Annular baffle; 121. Grouting hole; 2. Positioning component; 21. Positioning rod; 211. Top block; 212. External thread; 22. Washer; 23. Adjusting nut. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one embodiment of the present invention provides a durable expansion bolt, including a pre-embedded component 1, in which a positioning component 2 passes through. The pre-embedded component 1 includes a sleeve 11, with limiting protrusions 113 arranged in a ring array on the top of the outer wall of the sleeve 11, and an annular baffle 12 arranged on the outer side of the bottom of the sleeve 11. Grouting holes 121 are arranged in a ring array on the annular baffle 12, which is closely attached to the sleeve 11.

[0031] Specifically, by setting the sleeve 11, limiting protrusion 113, annular baffle 12 and grouting hole 121 in the pre-embedded component 1, the effect of effectively preventing water vapor infiltration, reducing the risk of bolt corrosion, ensuring structural stability and extending service life is achieved.

[0032] During installation, the sleeve 11 is inserted into the drill hole, and the filling material is injected through the grouting hole 121. After the filling material solidifies, it not only enhances the connection stability between the bolt and the fixing body, but also forms a seal between the sleeve 11 and the drill hole wall, which greatly reduces the possibility of water vapor penetration and thus reduces the risk of bolt corrosion.

[0033] Meanwhile, the limiting protrusions 113 arranged in a ring array on the top of the outer wall of the casing 11 can effectively increase resistance during tightening and adjustment, preventing the casing 11 from coming out of the borehole in the reverse direction, thus ensuring the stability of the structure.

[0034] The annular baffle 12 is set close to the sleeve 11. During the injection of filling material, it plays an auxiliary supporting role and guides the uniform distribution of filling material, which further improves the sealing and connection effect, thereby extending the service life of the expansion bolt. It solves the problem that after the traditional expansion bolt is inserted into the drill hole for fixing, the surface of the bolt cannot be completely sealed at the connection with the drill hole, which makes it easy for water to enter and cause the bolt to be corroded by water vapor and damaged.

[0035] Example 2: To achieve a better fit between the casing and the borehole inner wall and to improve installation stability, such as... Figure 2 and Figure 3 As shown, in this embodiment, the top of the sleeve 11 is provided with an expansion joint 112 in a ring array, and the depth of the expansion joint 112 is half the height of the sleeve 11.

[0036] Specifically, the top of the sleeve 11 has an expansion joint 112 with a depth of half the height of the sleeve 11 in a ring array. This allows the top of the sleeve 11 to deform under the pressure of the top block 211 when it is inserted into the drill hole and tightened during installation. This allows it to fit better against the inner wall of the drill hole, improving the compatibility and installation stability between the sleeve 11 and the fixing body.

[0037] Furthermore, the longitudinal section of the limiting protrusion 113 adopts a triangular structure design, and the bottom of the limiting protrusion 113 is an acute angle.

[0038] Specifically, the limiting protrusion 113 adopts a structural design with a triangular longitudinal section and an acute angle at the bottom, which can effectively increase the resistance during tightening and adjustment, thereby preventing the sleeve 11 from coming out of the borehole in the opposite direction and enhancing the stability of the pre-embedded component 1 after installation.

[0039] Furthermore, the outer wall of the sleeve 11 above the annular baffle 12 is provided with a positioning external thread 111. The depth of the positioning external thread 111 matches the top width of the limiting protrusion 113, and the height of the positioning external thread 111 is half the height of the sleeve 11.

[0040] Specifically, the outer wall of the sleeve 11 above the annular baffle 12 is provided with a positioning external thread 111, and the depth of the positioning external thread 111 matches the top width of the limiting protrusion 113, and the height is half the height of the sleeve 11. This allows the contact surface to be increased through the positioning external thread 111 after grouting, thereby further stabilizing the position of the positioning sleeve 11 and making the grouting more complete.

[0041] Example 3: To achieve flexible adjustment of the positioning rod position and enhance the tightening effect and durability of the expansion bolts, such as... Figure 2 and Figure 4As shown, in this embodiment, the positioning component 2 includes a positioning rod 21. The bottom of the outer wall of the positioning rod 21 is provided with an external thread 212 and an adjusting nut 23 is threadedly installed. The top of the positioning rod 21 is provided with a top block 211. The outer diameter of the positioning rod 21 is smaller than the inner diameter of the sleeve 11.

[0042] Specifically, the bottom of the outer wall of the positioning rod 21 of the positioning component 2 is provided with an external thread 212 and an adjusting nut 23 is installed. The top is provided with a top block 211. The outer diameter of the positioning rod 21 is smaller than the inner diameter of the sleeve 11, so that the position of the positioning rod 21 in the sleeve 11 can be flexibly adjusted by rotating the adjusting nut 23. The top block 211 can provide support and expansion for the inside of the sleeve 11, thereby enhancing the fastening effect and durability of the entire expansion bolt.

[0043] Furthermore, a washer 22 is movably fitted on the positioning rod 21 above the adjusting nut 23, and the outer diameter of the washer 22 matches the outer diameter of the annular baffle 12.

[0044] Specifically, a washer 22 with an outer diameter matching that of the annular baffle 12 is movably fitted on the positioning rod 21 above the adjusting nut 23. This allows the washer 22 to evenly distribute pressure when the adjusting nut 23 is tightened, preventing the adjusting nut 23 from directly acting on the annular baffle 12 and causing damage. This extends the service life of the expansion bolt and related components, improves overall durability, and can also seal the grouting hole 121.

[0045] Furthermore, the top block 211 adopts a frustum-shaped structure design, and the top cross-sectional dimension of the top block 211 is larger than the inner diameter of the sleeve 11.

[0046] Specifically, the top block 211 adopts a frustum-shaped structure and the top cross-sectional dimension is larger than the inner diameter of the sleeve 11. This allows the top block 211 to more effectively support and expand the internal space of the sleeve 11 during the retraction of the positioning rod 21, further enhancing the tightness of the connection between the sleeve 11 and the fixing body, and improving the fixing effect and durability of the expansion bolt.

[0047] When using this invention, an impact drill is used to precisely drill holes of suitable diameter and depth on the surface of objects such as walls, floors, or columns that serve as fixed bodies, based on the specific specifications of the sleeve 11 in the pre-embedded component 1 of the durable expansion bolt. All dimensions of this hole must strictly conform to the sleeve 11 to lay the foundation for subsequent installation work.

[0048] Pick up the positioning rod 21 from the positioning assembly 2 of the durable expansion bolt, and insert the positioning rod 21 into the sleeve 11 through the top opening of the sleeve 11. Hold the sleeve 11 with the positioning rod 21 inserted, and accurately align the end with the expansion joint 112 with the pre-drilled hole. Then, slowly and steadily insert the sleeve 11 into the hole. Continue inserting the sleeve 11 until the annular baffle 12 is tightly fitted against the surface of the fixed body. When this state is reached, it indicates that the sleeve 11 has been inserted to the appropriate depth.

[0049] Using the grouting hole 121 on the annular baffle 12 in the pre-embedded component 1, cement grout or other filling materials are injected into the gap formed between the sleeve 11 and the borehole wall. During the injection process, it is important to ensure that the filling material is evenly filled into the entire gap space. After the filling material solidifies, it can significantly enhance the connection stability between the durable expansion bolt and the fixing body. At the same time, the filling material can also play a good sealing role in the gap, greatly reducing the risk of water vapor infiltration.

[0050] The adjusting nut 23 is precisely threaded onto the external thread 212. Above the adjusting nut 23, a washer 22 is movably fitted onto the positioning rod 21. The outer diameter of the washer 22 matches the outer diameter of the annular baffle 12 in the pre-embedded component 1. During the tightening of the adjusting nut 23, the washer 22 can evenly distribute the pressure, preventing the adjusting nut 23 from directly damaging the annular baffle 12 when tightened. By continuously rotating the adjusting nut 23, the position of the positioning rod 21 inside the sleeve 11 can be flexibly adjusted. Since the top of the sleeve 11 has an annular array of expansion joints 112, and the top of the positioning rod 21 is provided with a top block 211, the top block 211 can provide a certain degree of support and expansion for the internal space of the sleeve 11. Continuously tighten the adjusting nut 23 until the desired installation effect is achieved, at which point the installation of the durable expansion bolt is completed.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A strong and durable expansion bolt, comprising a pre-buried assembly (1) with a positioning assembly (2) passing through, characterized in that: the pre-buried assembly (1) comprises a sleeve (11), the outer wall of the sleeve (11) is provided with a limiting protrusion (113) in an annular array at the top, and the outer side of the bottom of the sleeve (11) is provided with an annular baffle (12), and the annular baffle (12) is provided with a grouting hole (121) in an annular array close to the sleeve (11).

2. The expansion bolt according to claim 1, wherein The top of the sleeve (11) is provided with expansion joints (112) in an annular array, and the depth of the expansion joints (112) is half of the height of the sleeve (11).

3. The heavy-duty expansion bolt of claim 1, wherein, The longitudinal section of the limiting protrusion (113) adopts a triangular structure design, and the bottom of the limiting protrusion (113) is an acute angle.

4. The heavy-duty expansion anchor according to claim 1, wherein, The outer wall of the sleeve (11) above the annular baffle (12) is provided with a positioning external thread (111), the depth of the positioning external thread (111) matches the width of the top of the limiting protrusion (113), and the height of the positioning external thread (111) is half of the height of the sleeve (11).

5. The heavy-duty expansion anchor according to claim 1, wherein, The positioning assembly (2) comprises a positioning rod (21), the outer wall of the positioning rod (21) is provided with an external thread (212) and is threadedly connected with an adjusting nut (23), the top of the positioning rod (21) is provided with a top block (211), and the outer diameter of the positioning rod (21) is smaller than the inner diameter of the sleeve (11).

6. The heavy-duty expansion anchor according to claim 5, wherein, The positioning rod (21) above the adjusting nut (23) is movably sleeved with a gasket (22), and the outer diameter of the gasket (22) matches the outer diameter of the annular baffle (12).

7. The heavy-duty expansion anchor according to claim 5, wherein, The top block (211) adopts a circular truncated cone structure design, and the cross-sectional dimension of the top of the top block (211) is greater than the inner diameter of the sleeve (11).

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