Reinforcing device and method for ball net rack rod piece

Abstract

The invention relates to the technical field of ball net rod piece reinforcement, in particular to a ball net frame rod piece reinforcement device and method.The ball net frame rod piece reinforcement device comprises an existing rod piece, the middle of the existing rod piece is wrapped with a sleeve, the outer wall of the sleeve is hooped with three annular hoop clamp sets (3), and the annular hoop clamp sets (3) are arranged on the outer wall of the sleeve in a hooped mode. The three annular hoop sets (3) are arranged at the two ends and the middle of the sleeve (2) in a hooping mode respectively. Each annular hoop clamp set (3) is provided with three sub-hoops (7), the distances among the three sub-hoops (7) are equal, and reinforcing pieces (9) are symmetrically arranged among the three sub-hoops (7). The reinforcing structure has the effect that the grid structure rod piece with the slenderness ratio not meeting the requirement and the compression stability not meeting the requirement is convenient to reinforce.

Description

Technical Field

[0001] This application relates to the technical field of strengthening net members, and in particular to a strengthening device and method for net frame members. Background Technology

[0002] Space frame structures, as a type of highly statically indeterminate spatial rod structure, are widely used in industrial and civil construction due to their good load-bearing performance, high stiffness, good integrity and seismic performance, economy and safety, and convenient manufacturing and installation. In particular, with the widespread use of computers, the design and calculation of space frame structures have become very simple.

[0003] Currently, there are four common reinforcement methods for space frame structures: enlarging the cross-section, external steel reinforcement, full-length external steel bonding reinforcement, and carbon fiber reinforcement. Enlarging the cross-section involves wrapping existing members with channel steel or attaching new steel pipes, then increasing the cross-sectional size through welding or bolting. While this method improves stiffness, it presents challenges such as high-altitude welding risks, significant weight increase, and long construction periods. Furthermore, changes in cross-sectional size can lead to redistribution of internal forces, triggering a chain reaction of reinforcement needs. External steel reinforcement involves wrapping members with steel plates or profiles, securing them with bolts, and filling with sealant. While this method avoids welding, it requires wrapping the entire length of the member, resulting in large material consumption, significant impact on the original structure's shape and space, and the end connections are prone to fatigue damage due to stress concentration. Full-length external steel bonding reinforcement involves bonding steel plates to the surface of the members using structural adhesive, supplemented by end bolts. While this method reduces construction difficulty, the bonding effect between the steel plate and the member is limited by the adhesive layer thickness and curing conditions, making delamination a common problem, and it's difficult to precisely control the stiffness after reinforcement. Carbon fiber reinforcement: This method involves wrapping members with carbon fiber cloth and forming a composite load-bearing structure with epoxy resin. While this method offers significant weight reduction, it is only suitable for reinforcing tension members or providing localized fatigue resistance. It offers limited improvement in the stability of compression members and is also costly in terms of materials.

[0004] However, due to long-term loads, material aging, or design defects, some members are prone to problems such as insufficient slenderness ratio and instability under compression. The above four reinforcement methods have obvious drawbacks, including complex construction, heavy weight, and insufficient durability. Summary of the Invention

[0005] To facilitate the reinforcement of space frame structure members that do not meet the requirements for slenderness ratio and compressive stability, this application provides a reinforcement device and method for ball space frame members.

[0006] Firstly, this application provides a reinforcement device for net frame members, which adopts the following technical solution: A reinforcement device for net frame members includes existing members, with a sleeve wrapped around the middle of the existing members, and an annular clamping group clamped on the outer wall of the sleeve.

[0007] By adopting the above technical solution, when it is necessary to reinforce existing members, a sleeve is first wrapped around the middle of the existing member. After the sleeve is wrapped, the two ends of the existing member are reserved with the same length. Then, a ring-shaped clamp is installed on the outer wall of the sleeve to complete the reinforcement of the existing member. This reinforcement device is suitable for reinforcement of members of space frame structures whose slenderness ratio and compressive stability are not met. Using this reinforcement device does not change the shape and usable space of the original building space frame structure, greatly reduces weight, and the stiffness can be controlled. It has little impact on the stress of adjacent components and foundations, avoids the chain reaction of reinforcement design, and at the same time, no wet work is required on the construction site, which greatly improves the on-site construction speed while ensuring that the structure has sufficient safety.

[0008] Optionally, the sleeve includes an upper tube and a lower tube, which together form a sleeve space for the existing rod. The sleeve space is filled with structural adhesive, and the upper tube and the lower tube are pre-attached to the outer wall of the existing rod using the structural adhesive.

[0009] By adopting the above technical solution, when it is necessary to install a sleeve, the sleeve space formed by the upper and lower pipes is first installed on the outer wall of the existing rod, and then structural adhesive is injected into the sleeve space, which helps to improve the convenience of sleeve pre-installation.

[0010] Optionally, both ends of the sleeve are provided with a 45° chamfer, and the length ratio of the existing rod to the sleeve is 2:1.

[0011] By adopting the above technical solutions and using a 45° chamfer, stress concentration can be reduced, improving the fatigue resistance and overall stability of the structure. The 2:1 length ratio of the existing members to the sleeve facilitates the semi-bonded steel reinforcement of the existing members. Compared with full-length external steel reinforcement, this not only reduces the weight of the steel reinforcement but also eliminates the need for wet work on site, greatly improving the on-site construction speed while ensuring sufficient structural safety.

[0012] Optionally, the ring clamp assembly is provided in three sets, and the three sets of ring clamp assemblies are respectively clamped at both ends and the middle of the sleeve.

[0013] By adopting the above technical solution, the three sets of ring clamps help to ensure that the two ends and the middle of the sleeve are clamped to the existing rods, ensuring that the new sleeve is effectively anchored and that the new sleeve and the existing rods share the force, thereby improving the stability of the sleeve reinforcement of the existing rods.

[0014] Optionally, each group of the ring-shaped clamps is provided with three sub-clamps, the distance between the three sub-clamps is equal, and reinforcing plates are symmetrically arranged between the three sub-clamps.

[0015] By adopting the above technical solution, the three sub-hoops are connected as a whole by reinforcing plates. Under the action of the reinforcing plates, it is easy to quickly position the three sub-hoops and ensure that the spacing between the three sub-hoops is equal.

[0016] Optionally, a fixing seat is provided on the opposite side of the two reinforcing plates, and a band is provided on the outer wall of the sleeve. The band passes through the two fixing seats in sequence, and the fixing seat is provided with a fixing component for locking the band.

[0017] By adopting the above technical solution, when the sleeve needs to be clamped twice, the hoop is first passed through the two fixing seats in sequence, and then the hoop is fixed by the fixing component. At this time, the hoop is a secondary hoop reinforcement sleeve, which avoids the situation where the sleeve becomes loose after some of the sub-hoops loosen, thus ensuring the reinforcement strength of the sleeve.

[0018] Optionally, the fixing component includes a locking rod, and the surface of the hoop is provided with a plurality of locking holes. The locking rod is slidably disposed on one side of the fixing seat, one end of the locking rod extends into the fixing seat, and one end of the locking rod is inserted into the locking hole. The fixing seat is provided with an elastic element for cooperating to drive the locking rod to move.

[0019] By adopting the above technical solution, when it is necessary to fix the hoop, firstly, one end of the hoop is inserted through the fixing seat. When the hoop is in the hoop sleeve and the locking rod is aligned with the lock hole, the locking rod is inserted into the lock hole by the elastic element. At this time, the hoop is on the outer wall of the sleeve, which helps to improve the stability of the hoop sleeve.

[0020] Optionally, the elastic element is a spring, which is sleeved on the locking rod. One end of the spring is fixedly connected to the side wall of the locking rod, and the other end of the spring is fixedly connected to the outer wall of the fixing seat.

[0021] By adopting the above technical solution, when the locking rod is pulled away from the fixed seat, the spring stretches and stores elastic force. When the locking rod is released, the spring releases elastic force and moves the locking rod closer to the fixed seat. At this time, the locking rod is inserted into the fixed seat, which helps to improve the stability of the movement of the locking rod fixing band.

[0022] Secondly, this application provides a method for reinforcing net frame members, comprising the following steps: S1: Surface treatment of existing poles: Use an angle grinder to remove rust, oil and loose coating from the surface of existing poles until the metal substrate is exposed; S2: Sleeve processing and pretreatment: cut steel plates to design dimensions and bend them into sleeves. Make 45° chamfers at both ends of the sleeve. S3: Sleeve pre-installation and structural adhesive injection. The sleeve is placed in the middle of the existing rod and then temporarily fixed with a clamp. Then, the structural adhesive is mixed evenly according to the ratio and injected into the gap between the sleeve and the existing rod. S4: Sleeve fixing, with ring clamps installed at both ends and the middle of the sleeve; S5: Curing and acceptance, static curing for 24-48 hours.

[0023] By adopting the above technical solution, the reinforcement method is suitable for reinforcement of space frame structure members whose slenderness ratio and compressive stability are not met. The reinforcement method does not change the shape and usable space of the original building space frame structure, greatly reduces weight, controls stiffness, has little impact on the stress of adjacent components and foundations, avoids chain reactions in reinforcement design, and eliminates the need for wet work on the construction site, which greatly improves the on-site construction speed while ensuring sufficient safety of the structure.

[0024] In summary, this application includes the following beneficial technical effects: When existing members need to be reinforced, a sleeve is first wrapped around the middle of the existing member. After the sleeve is wrapped, the two ends of the existing member are left with the same length. Then, a ring-shaped clamp is installed on the outer wall of the sleeve to complete the reinforcement of the existing member. This reinforcement device is suitable for reinforcement of members in space frame structures where the slenderness ratio and compressive stability are not met. Using this reinforcement device does not change the shape and usable space of the original building space frame structure, greatly reduces weight, and the stiffness can be controlled. It has little impact on the stress of adjacent components and foundations, avoids chain reactions in reinforcement design, and eliminates the need for wet work on the construction site, greatly improving the on-site construction speed while ensuring sufficient structural safety. Attached Figure Description

[0025] Figure 1 This is a partial cross-sectional front view of the reinforcement device for the net frame members of this application; Figure 2 yes Figure 1 A schematic diagram of the middle end face 1-1; Figure 3 yes Figure 1 Schematic diagram of the middle end face 2-2; Figure 4 This is a schematic diagram of the overall structure of the reinforcement device for the net frame members of this application; Figure 5 This is a schematic diagram of the overall structure of the ring-shaped clamp assembly of this application; Figure 6 This is a schematic diagram of the structure of the reinforcing sheet in this application; Figure 7 This is a schematic diagram of the overall structure of the hoop in this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Existing rod; 2. Sleeve; 3. Ring clamp assembly; 4. Upper tube; 5. Lower tube; 6. Sleeve space; 7. Sub-clamp; 8. Screw; 9. Reinforcing plate; 10. Nut; 11. Fixing seat; 12. Clamp band; 13. Locking rod; 14. Locking hole; 15. Spring. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0028] See Figure 1 In a first aspect, this application provides a reinforcement device for a ball net frame member, including an existing member 1, which is a ball net frame member of a building, and the existing member 1 has defects such as insufficient slenderness ratio and unsatisfactory compressive stability. A sleeve 2 is wrapped around the middle of the existing member 1, and an annular clamping group 3 is provided on the outer wall of the sleeve 2.

[0029] When it is necessary to reinforce the existing rod 1, first wrap the sleeve 2 around the middle of the existing rod 1. After the sleeve 2 is wrapped, the two ends of the existing rod 1 are reserved with the same length. Then, a ring-shaped clamp group 3 is installed on the outer wall of the sleeve 2 to complete the reinforcement of the existing rod 1.

[0030] See Figure 1-3 The sleeve 2 includes an upper tube 4 and a lower tube 5, both made of steel. The upper tube 4 and the lower tube 5 enclose a sleeve space 6, and the upper tube 4 and the lower tube 5 are sleeved onto the outer wall of the existing rod 1 through the sleeve space 6. Structural adhesive is injected into the sleeve space 6, and the upper tube 4 and the lower tube 5 are pre-attached to the outer wall of the existing rod 1 through the structural adhesive.

[0031] When it is necessary to install sleeve 2, firstly, the sleeve space 6 formed by the upper pipe 4 and the lower pipe 5 is installed on the outer wall of the existing rod 1, and then structural adhesive is injected into the sleeve space 6, which helps to improve the convenience of pre-installation of sleeve 2.

[0032] join Figure 1 Both ends of the sleeve 2 are provided with 45° chamfers. The center of the sleeve 2 coincides with the center of the existing rod 1, and the length ratio of the existing rod 1 to the sleeve 2 is 2:1.

[0033] By cutting both ends of the sleeve 2 at a 45° bevel, local stress concentration caused by sharp right angles is avoided, thereby improving the fatigue resistance and overall stability of the structure. By using a length ratio of 2:1 between the existing rod 1 and the sleeve 2, the material used in the sleeve 2 is reduced. For the existing rod 1, which does not meet the requirements for slenderness ratio and compressive stability, lightweight reinforcement is further achieved while ensuring the safety and durability of the connection parts.

[0034] See Figure 1The ring clamp group 3 is provided in three sets, and the three sets of ring clamp groups 3 are respectively clamped at both ends and the middle of the sleeve 2. Each set of ring clamp groups 3 is provided with three sub-clamps 7, and the distance between the three sub-clamps 7 is equal. In this embodiment, the distance between the three sub-clamps 7 is 200mm, and the distance between the outer edge sub-clamp 7 and the end of the sleeve 2 is 100mm.

[0035] By using three sets of ring clamps 3, the two ends and the middle of the sleeve 2 are clamped to the existing rod 1, ensuring that the sleeve 2 is effectively anchored and that the sleeve 2 and the existing rod 1 share the force, thereby improving the stability of the sleeve 2 in reinforcing the existing rod 1.

[0036] See Figure 4 and Figure 5 To strengthen the connection between the three sub-hoops 7 and to quickly adjust the spacing between them, screw rods 8 are fixedly connected to the symmetrical sides of the sub-hoops 7. Reinforcing plates 9 are symmetrically installed between two adjacent sub-hoops 7. The two ends of the reinforcing plates 9 are respectively sleeved on the screw rods 8, and nuts 10 are threaded onto the screw rods 8.

[0037] The three sub-hoops 7 are connected as a whole by the reinforcing plate 9, which strengthens the connection strength of each group of ring-shaped hoop clamps 3. At the same time, the reinforcing plate 9 quickly positions the spacing between the three sub-hoops 7, ensuring that the spacing between the three sub-hoops 7 is equal.

[0038] See Figure 5-7 To prevent the sleeve 2 from loosening and falling off after prolonged use, the sleeve 2 needs to be clamped again. Fixing seats 11 are fixedly connected to the opposite sides of the two reinforcing plates 9. The outer wall of the sleeve 2 is fitted with a clamp band 12, which is made of steel. The clamp band 12 passes through the two fixing seats 11 sequentially.

[0039] To facilitate locking the band 12, a fixing component is installed on the fixing base 11. The fixing component includes a locking rod 13. Multiple locking holes 14 are provided through the surface of the band 12 and are evenly distributed along the length of the band 12. The locking rod 13 is slidably connected to the fixing base 11, with one end of the locking rod 13 extending into the fixing base 11 and inserted into the locking hole 14.

[0040] In addition, to facilitate the movement of the locking rod 13, the fixed base 11 is equipped with an elastic element, which is a spring 15. The spring 15 is sleeved on the locking rod 13, one end of the spring 15 is fixedly connected to the side wall of the locking rod 13, and the other end of the spring 15 is fixedly connected to the outer wall of the fixed base 11.

[0041] When secondary clamping of the sleeve 2 is required, first pull the locking rod 13 on one of the fixing seats 11. The locking rod 13 stretches the spring 15, and the spring 15 stores its elastic force. Then, insert one end of the clamp 12 into the fixing seat 11, and then wrap the other end of the clamp 12 around the sleeve 2. Note that when the clamp 12 is wrapped around the sleeve 2, the other end of the clamp 12 also passes through the other fixing seat 11. Then, insert the other end of the clamp 12 into one of the fixing seats 11. Finally, release the locking rod 13, the spring 15 releases its elastic force, and drives the locking rod 13 to insert into the locking hole 14 on the clamp 12. At this time, the clamp 12 clamps the sleeve 2, thereby achieving secondary clamping of the sleeve 2.

[0042] Working principle of a reinforcement device for net frame members: When it is necessary to reinforce the existing member 1, firstly, the sleeve space 6 formed by the upper pipe 4 and the lower pipe 5 is fitted onto the outer wall of the existing member 1, with the centers of the upper pipe 4 and the lower pipe 5 coinciding with the center of the existing member 1. Then, structural adhesive is injected into the sleeve space 6 to pre-clamp the sleeve 2. Next, three sets of ring clamps 3 are respectively clamped at both ends and the middle of the sleeve 2.

[0043] When installing the stirrup 7, the two ends of the reinforcing plate 9 are fitted onto the screws 8 of the two adjacent stirrups 7, and then the nuts 10 are tightened by thread. At this time, the reinforcing plate 9 is fixed between the two stirrups 7.

[0044] When secondary clamping of the sleeve 2 is required, first pull the locking rod 13 on one of the fixing seats 11. The locking rod 13 stretches the spring 15, and the spring 15 stores its elastic force. Then, insert one end of the clamp 12 into the fixing seat 11, and then wrap the other end of the clamp 12 around the sleeve 2. Note that when the clamp 12 is wrapped around the sleeve 2, the other end of the clamp 12 also passes through the other fixing seat 11. Then, insert the other end of the clamp 12 into one of the fixing seats 11. Finally, release the locking rod 13, the spring 15 releases its elastic force, and drives the locking rod 13 to insert into the locking hole 14 on the clamp 12. At this time, the clamp 12 clamps the sleeve 2, thereby achieving secondary clamping of the sleeve 2.

[0045] Secondly, this application provides a method for reinforcing net frame members, comprising the following steps: S1: Surface treatment of existing rod 1: Use an angle grinder to remove rust, oil and loose coating from the surface of existing rod 1 until the metal substrate is exposed; sand with sandpaper to a roughness Ra≥50μm to enhance the adhesion of structural adhesive; clean the surface dust to ensure no impurities remain; S2: Sleeve 2 processing and pretreatment, cut steel plates according to design dimensions, and use a bending machine to bend them into upper tube 4 and lower tube 5. Make 45° chamfering at both ends of upper tube 4 and lower tube 5, and make the length direction consistent with the axis of the existing rod 1. Sandblast the inner surface of upper tube 4 and lower tube 5 and apply anti-rust primer. S3: Pre-installation of sleeve 2 and injection of structural adhesive. The upper tube 4 and the lower tube 5 are sleeved in the middle of the existing rod 1 and then temporarily fixed by clamps. Then, the structural adhesive is mixed evenly according to the ratio and injected into the sleeve space 6. S4: Fix sleeve 2. Install ring clamps 3 at both ends and the middle of sleeve 2. Tighten the bolts symmetrically with a torque wrench. The tightening torque must meet the design requirements (usually ≥50N·m). Remove excess structural adhesive to ensure a smooth appearance. S5: Curing and Acceptance. Allow to stand for 24-48 hours to ensure the structural adhesive is fully cured.

[0046] In summary, this reinforcement device and method are suitable for reinforcing members of space frame structures whose slenderness ratio and compressive stability are not met. Using this reinforcement device and method does not change the shape and usable space of the original building space frame structure, greatly reduces weight, allows for controllable stiffness, has little impact on the stress of adjacent components and foundations, avoids chain reactions in the reinforcement design, and eliminates the need for wet work on the construction site, greatly improving the on-site construction speed while ensuring sufficient structural safety.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reinforcement device for net frame members, comprising existing members (1), characterized in that: The existing rod (1) is wrapped with a sleeve (2) in the middle, and the outer wall of the sleeve (2) is equipped with a ring-shaped clamp group (3); The ring clamp group (3) is provided in three sets, and the three sets of ring clamp groups (3) are respectively clamped at both ends and the middle of the sleeve (2); Each of the ring-shaped clamp groups (3) is provided with three sub-clamps (7), the distance between the three sub-clamps (7) is equal, and reinforcing plates (9) are symmetrically arranged between the three sub-clamps (7).

2. The reinforcement device for net frame members according to claim 1, characterized in that: The sleeve (2) includes an upper tube (4) and a lower tube (5). The upper tube (4) and the lower tube (5) enclose the sleeve space (6) of the existing rod (1). The sleeve space (6) is filled with structural adhesive. The upper tube (4) and the lower tube (5) are pre-attached to the outer wall of the existing rod (1) by the structural adhesive.

3. The reinforcement device for net frame members according to claim 1, characterized in that: Both ends of the sleeve (2) are provided with 45° chamfers, and the length ratio of the existing rod (1) to the sleeve (2) is 2:

1.

4. The reinforcement device for net frame members according to claim 1, characterized in that: A fixing seat (11) is provided on the opposite side of the two reinforcing plates (9). A band (12) is provided on the outer wall of the sleeve (2). The band (12) passes through the two fixing seats (11) in sequence. The fixing seat (11) is provided with a fixing component for locking the band (12).

5. A reinforcement device for net frame members according to claim 4, characterized in that: The fixing component includes a locking rod (13), and the surface of the band (12) is provided with a plurality of locking holes (14). The locking rod (13) is slidably disposed on one side of the fixing seat (11), one end of the locking rod (13) extends into the fixing seat (11), and one end of the locking rod (13) is inserted into the locking hole (14). The fixing seat (11) is provided with an elastic element for cooperating to drive the locking rod (13) to move.

6. A reinforcing device for net frame members according to claim 5, characterized in that: The elastic element is a spring (15), which is sleeved on the locking rod (13). One end of the spring (15) is fixedly connected to the side wall of the locking rod (13), and the other end of the spring (15) is fixedly connected to the outer wall of the fixing seat (11).

7. A method for reinforcing net frame members, based on the reinforcing device for net frame members according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Surface treatment of existing rod (1): Use an angle grinder to remove rust, oil and loose coating from the surface of existing rod (1) until the metal substrate is exposed; S2: Sleeve (2) processing and pretreatment: cut steel plates according to design dimensions and bend them into sleeves (2); cut the edges of sleeves (2) at 45°. S3: Pre-installation of sleeve (2) and injection of structural adhesive. Sleeve (2) is placed in the middle of the existing rod (1) and then temporarily fixed by clamps. Then, the structural adhesive is mixed evenly according to the ratio and injected into the gap between sleeve (2) and existing rod (1). S4: Sleeve (2) is fixed, and ring clamps (3) are installed at both ends and the middle of sleeve (2); S5: Curing and acceptance, static curing for 24-48 hours.

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