Lower flange clamping type steel beam reinforcing device and method

Abstract

The invention belongs to the technical field of steel beam reinforcing, and provides a lower flange clamping type steel beam reinforcing device and method.The lower flange clamping type steel beam reinforcing device comprises a lower wing connecting block, an inner clamping plate connected with the lower wing connecting block, a telescopic supporting rod connected with the inner clamping plate and a floor slab connecting block connected with the telescopic supporting rod; the steel beam is connected with a floor slab connecting block fixed on an upper floor slab through a lower wing connecting block, an inner clamping plate and a telescopic supporting rod; the lower wing connecting block comprises a flange clamping groove, a flange clamping device mounting hole formed in a side plate of the flange clamping groove, and a lower vertical plate perpendicularly fixed to the side plate of the flange clamping groove. After the lower flanges are clamped through the flange clamping grooves, the lower flanges are fixed through the flange clamping device mounting holes, and the two lower wing connecting blocks on the opposite sides are connected through the lower vertical plates, so that the reinforcing strength is guaranteed, and welding is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of steel beam reinforcement, and in particular relates to a lower flange clamping type steel beam reinforcement device and method. Background Art

[0002] In the steel beams of steel frame structures with floor slabs, the upper flanges are usually reliably connected to the floor slabs or rigid decking. Therefore, when the upper flanges are under pressure, the overall stability of the steel beams can be guaranteed. The lower flanges of the steel beams are often connected to the steel columns by a mixed bolt-welding or welding method. There is usually a large negative moment zone in the end section of the steel beam. At this time, the upper flange is under tension and the lower flange is under compression. The lower flange may become unstable due to overall bending and torsion. At this time, it is necessary to reinforce the lower flange and web of the steel beam to improve its stability. The relevant specifications require that corner braces or stiffening ribs be set for sections that do not meet the calculation requirements in the negative moment zone to prevent instability in the negative moment zone.

[0003] In practice, the operation of welding corner braces or stiffening ribs is relatively complicated, and welding may increase the residual stress of the structure and reduce its fatigue stress under long-term service. This is especially likely to increase the risk for components with high bending and torsion risks and wide reinforcement areas. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a lower flange clamping steel beam reinforcement device and method, wherein the lower wing connecting block comprises a flange clamping groove, a flange clamp mounting hole provided on the side plate of the flange clamping groove, and a lower vertical plate fixed vertically to the side plate of the flange clamping groove; the lower flange can be clamped by the flange clamping groove and then fixed by the flange clamp mounting hole, and the two lower wing connecting blocks on the opposite sides are connected by the lower vertical plate, thereby ensuring the reinforcement strength and eliminating the need for welding.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present invention provides a lower flange clamping type steel beam reinforcement device, which adopts the following technical solution:

[0006] A lower flange clamping steel beam reinforcement device, comprising a lower wing connection block, an inner clamping plate connected to the lower wing connection block, a telescopic support rod connected to the inner clamping plate, and a floor connection block connected to the telescopic support rod;

[0007] The lower wing connecting block includes a flange clamping groove, a flange clamp mounting hole provided on the side plate of the flange clamping groove, and a lower vertical plate vertically fixed to the side plate of the flange clamping groove; the floor connecting block and the end of the lower wing connecting block away from the inner plywood, as well as the end of the floor connecting block and the inner plywood away from the lower wing connecting block are both connected with a telescopic support rod.

[0008] Furthermore, a clamping plate mounting groove and a clamping plate limit block fixing bolt hole are provided on the side wall of the flange clamping groove; in the flange clamping groove, a first side panel bolt mounting hole and a second side panel bolt mounting hole are provided on the bottom surface of the vertical side wall, and a side panel support rod connecting block is provided; a side connection expansion hole is provided at the bottom of the flange clamping groove; and a lower vertical plate support rod connecting block is provided on the lower vertical plate.

[0009] Furthermore, a splint limit block is arranged between the lower wing connecting block and the inner splint; the splint limit block includes a splint bayonet and a limit block lower support plate, and a limit block upper cover plate is arranged at the splint bayonet; a limit block lower support plate is arranged between the limit block lower support plate and the splint bayonet.

[0010] Furthermore, a flange clamp is arranged in the flange clamp installation hole, and the flange clamp includes a screw rod, a clamping plate and a clamping block arranged at the end of the screw rod, and a fastening nut and a washer arranged on the screw rod.

[0011] Furthermore, an outer splint is arranged between the inner splint and the telescopic support rod; an upper bolt hole is arranged at one end of the outer splint, and an outer splint upper cover plate and an outer splint lower support plate are arranged at the other end; an outer splint sliding groove is arranged between the outer splint upper cover plate and the outer splint lower support plate.

[0012] Furthermore, a lower connecting plate and a side connecting plate of the same beam are arranged in the middle of the lower vertical plates on both sides of the steel beam; bolt holes are arranged on the lower connecting plate of the same beam; and a first side connecting plate bolt hole without threads and a second side connecting plate bolt hole with threads are arranged on the side connecting plate of the same beam.

[0013] Furthermore, an outer plywood web connecting block is provided between the inner plywood and the telescopic support rod; and bolt holes and a support rod connecting block are arranged on the web connecting block.

[0014] Furthermore, the floor slab connection block includes an inner support rod connection block, an outer support rod connection block and bolt holes; the inner support rod connection block and the outer support rod connection block are respectively connected to the inner plywood and the lower wing connection block through the telescopic support rod.

[0015] Furthermore, the telescopic support rod includes an extension section, a telescopic control thread arranged on the extension section, a sleeve section connected to the extension section via the telescopic control thread, a rotating tray respectively arranged on the extension section and the sleeve section, and a constraint connecting block arranged on the rotating tray.

[0016] In order to achieve the above-mentioned purpose, in a second aspect, the present invention further provides a method for reinforcing a lower flange clamped steel beam, which adopts the following technical solution:

[0017] A method for reinforcing a lower flange clamped steel beam uses the lower flange clamped steel beam reinforcement device as described in the first aspect, comprising: clamping the lower flange through a flange clamping groove, fixing it through a flange clamp mounting hole, and connecting two lower wing connecting blocks on the corresponding sides through a lower vertical plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, the steel beam is connected to the floor connection block fixed on the upper floor through the lower wing connection block, the inner clamping plate and the telescopic support rod; wherein the lower wing connection block includes a flange clamping groove, a flange clamp mounting hole provided on the side plate of the flange clamping groove, and a lower vertical plate fixed vertically to the side plate of the flange clamping groove; the lower flange can be clamped by the flange clamping groove, and then fixed through the flange clamp mounting hole, and the two lower wing connection blocks on the opposite sides are connected by the lower vertical plate, thereby ensuring the reinforcement strength and no welding is required; a hole is opened and fixed at the position in the middle of the steel beam that has less influence on the stress performance, and a clamping and fixing method is adopted at the lower flange, thereby avoiding welding to increase the structural residual stress, reducing the fatigue stress under long-term service, and maximizing the reduction of the influence on the stress performance of the original steel beam while ensuring the reinforcement constraint strength.

[0020] The present invention adopts a modular design, and the unit module can be suitable for steel beams of different sizes. The connection between a single unit module and the same beam unit, floor slab, column, and different beam unit can be achieved by connecting the expansion structure. It is suitable for steel beams with different reinforcement strength requirements, reducing the occupation of indoor space, and adapting to the later reinforcement scenarios of different numbers of steel beams on columns such as corner columns, middle columns, and side columns. The structure is simple and compact, and can improve the efficiency of reinforcement construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0022] Figure 1 It is a structural schematic diagram of the reinforcement device of the present invention;

[0023] Figure 2A This is a schematic diagram of the structure of the lower wing connection block in the first viewing angle of the present invention;

[0024] Figure 2B This is a schematic diagram of the structure of the lower wing connection block in the second viewing angle of the present invention;

[0025] Figure 2C This is a schematic diagram of the structure of the lower wing connection block in the third viewing angle of the present invention;

[0026] Figure 2DThis is a schematic diagram of the structure of the lower wing connection block in the fourth viewing angle of the present invention;

[0027] Figure 3A It is a schematic diagram of the structure of the clamping plate limit block in the first viewing angle of the present invention;

[0028] Figure 3B It is a schematic diagram of the structure of the clamping plate limit block in the second viewing angle of the present invention;

[0029] Figure 4A It is a schematic diagram of the structure of the flange clamp in the first viewing angle of the present invention;

[0030] Figure 4B It is a schematic diagram of the structure of the flange clamp in the second viewing angle of the present invention;

[0031] Figure 4C It is an exploded schematic diagram of the middle flange clamp structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the Chinese and foreign splints of the present invention;

[0033] Figure 6 It is the installation schematic diagram of the present invention;

[0034] Fig. 7A This is a schematic diagram of the structure of the connecting plate under the same beam of the present invention;

[0035] Figure 7B This is a schematic diagram of the structure of the connecting plate on the same beam side of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the web connecting block of the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of the floor connection block of the present invention;

[0038] Fig.10 It is a schematic diagram of the telescopic support rod structure of the present invention;

[0039] Fig.11 It is a schematic diagram of the structure of the beam-column connecting block of the present invention;

[0040] Fig. 12A It is a schematic diagram of the structure of the unit modular module and the web connecting block of the present invention and the state after the installation;

[0041] Fig. 12B It is a schematic diagram of the unit modular module and web connecting block of the present invention and the structure after installation;

[0042] Fig.13 A schematic diagram of the structure of installing a single unit modular module and a beam-column connection block to reinforce a single beam of the present invention;

[0043] Fig.14 A schematic diagram of the structure of the single beam of the present invention installing a single unit modular module, a beam-column connecting block and a beam-slab support reinforcement;

[0044] Fig.15 A schematic diagram of the structure of installing two unit modular modules and reinforcing between beams and slabs on a single beam of the present invention;

[0045] Fig.16 It is a schematic diagram of the structure of installing two unit modular modules on both sides of a single beam and reinforcing between beams and slabs according to the present invention;

[0046] Among them, 1. lower wing connection block; 101. clamping plate installation groove; 102. flange clamp installation hole; 103. clamping plate limit block fixing bolt hole; 104. first side plate bolt installation hole; 105. second side plate bolt installation hole; 106. side plate support rod connection block; 107. flange clamping groove; 108. lower vertical plate; 109. side connection expansion hole; 110. vertical plate support rod connection block; 2. clamping plate limit block; 201. clamping plate bayonet ; 202, upper cover plate of limit block; 203, sliding groove of limit block; 204, lower support plate of limit block; 3, inner clamping plate; 4, flange clamp; 401, screw rod; 402, fastening nut; 403, washer; 404, clamping plate; 405, clamping block; 406, tightening connecting block; 5, outer clamping plate; 501, upper bolt hole; 502, cover plate of outer clamping plate; 503, sliding groove of outer clamping plate; 504, lower support plate of outer clamping plate; 6, same Connecting plate under beam; 601, bolt hole of connecting plate under beam; 7, connecting plate on the side of beam; 701, bolt hole of first connecting plate on the side of beam; 702, bolt hole of second connecting plate on the side of beam; 8, web connecting block; 801, bolt hole of web connecting block; 802, supporting rod connecting block; 9, floor connecting block; 901, inner supporting rod connecting block; 902, outer supporting rod connecting block; 903, bolt hole of floor connecting block; 10, telescopic supporting rod; 1001. Constraint connection block; 1002. Rotating tray; 1003. Extension section; 1004. Operating hole; 1005. Telescopic control thread; 1006. Casing section; 11. Beam-column connection block; 1101. Vertical plate; 1102. Vertical plate bolt hole; 1103. Stiffening rib; 1104. Flange side connection plate; 1105. Flange side connection plate bolt hole; 12. Bolt; 13. Column; 14. Steel beam; 15. Upper floor slab. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0049] Embodiment 1:

[0050] like Figure 1 As shown, this embodiment provides a lower flange clamping steel beam reinforcement device, including a lower wing connecting block 1, a clamping plate limit block 2, an inner clamping plate 3, a flange clamp 4, an outer clamping plate 5, a lower connecting plate 6 on the same beam, a side connecting plate 7 on the same beam, a web connecting block 8, a floor connecting block 9, a telescopic support rod 10, a beam-column connecting block 11 and bolts 12, etc.; wherein, the column 13, the steel beam 14 and the upper floor 15 are supplemented to facilitate the overall structural display of the reinforcement system.

[0051] Optionally, the lower wing connection block 1, the clamping plate limit block 2, the inner clamping plate 3, the flange clamp 4, and the outer clamping plate 5 form a unit modular module. Figure 2A to Figure 2D As shown, the lower wing connection block 1 is provided with a clamping plate installation groove 101, a flange clamp installation hole 102, a clamping plate limit block fixing bolt hole 103, a first side plate bolt installation hole 104, a second side plate bolt installation hole 105, a side plate support rod connection block 106, a flange clamping groove 107, a lower vertical plate 108, a side connection expansion hole 109 and a lower vertical plate support rod connection block 110. Among them, the inner wall of the flange clamp installation hole 102 is provided with a thread, which is convenient for the flange clamp to be screwed down to apply a clamping force, and the inner wall of the second side plate bolt installation hole 105 is provided with a thread, and the bolts here are only connected by thread connection, and no nuts are connected inside. The lower wing connection block 1 is used as the core connection part of the unit modular module, which is used to connect other components of the unit modular module and realize the connection with other modular modules and beam, plate and column constraints.

[0052] like Figure 3A and Figure 3B As shown, the clamping plate limit block 2 is provided with a clamping plate clamping hole 201, a limit block upper cover plate 202, a limit block sliding groove 203 and a limit block lower supporting plate 204.

[0053] like Figure 4A to Figure 4C As shown, the flange clamp 4 is provided with a screw rod 401, a fastening nut 402, a washer 403, a clamping plate 404, a clamping block 405 and a tightening connection block 406. The clamping plate 404 and the tightening connection block 406 are arranged below the screw rod 401. Figure 6 As shown, when installing the flange clamp 4, the screw rod 401 needs to be screwed into the corresponding flange clamp mounting hole 102, and the clamping block 405 is placed from the bottom. At this time, the clamping block 405 can rotate freely around the screw rod 401 between the clamping plate 404 and the tightening connection block 406, so as to continue to screw down the screw rod 401 to clamp the lower flange of the steel beam.

[0054] like Figure 5As shown, the outer splint 5 is provided with an upper bolt hole 501, an outer splint upper cover plate 502, an outer splint sliding groove 503 and an outer splint lower support plate 504. The inner splint 3 and the outer splint 5 are selected with the size and thickness, and can cooperate with the splint installation groove 101 to achieve adaptation to steel beams of different sizes.

[0055] like Fig. 7A and Figure 7B As shown, the lower connecting plate 6 of the same beam is provided with a bolt hole 601 of the lower connecting plate of the same beam; the side connecting plate 7 of the same beam is provided with a first side connecting plate bolt hole 701 without thread and a second side connecting plate bolt hole 702 with thread, which can respectively pass through the side connection expansion hole 109 and the clamped lower vertical plates 108 on both sides and connect the bolts to realize the connection of two or more unit modular modules between the same beams. When a single-side reinforcement is provided, the connection is only made through the side connecting plate 7 of the same beam.

[0056] like Figure 8 As shown, the web connecting block 8 is provided with web connecting block bolt holes 801 and web connecting block bolt holes 802, and is connected to the inner clamping plate 3, the outer clamping plate 5, and the web of the steel beam through the bolt holes.

[0057] like Fig. 9 As shown, the floor connection block 9 is provided with an inner support rod connection block 901, an outer support rod connection block 902 and a floor connection block bolt hole 903. The floor connection block 9 is fixed to the upper floor by expansion bolts, and the support rod connection block 802 and the inner support rod connection block 901 on the floor connection block 9 can be connected and supported by the telescopic support rod 10 to realize the constrained connection between the web of the reinforcement system beam and the floor. At the same time, the outer support rod connection block 902 and the upper side plate support rod connection block 106 can be connected and supported by the telescopic support rod 10 to realize the constrained connection between the lower flange of the reinforcement system beam and the floor. The constrained connection can be set on one side or on both sides.

[0058] like Fig.10 As shown, the telescopic support rod 10 is provided with a constraint connection block 1001, a rotating tray 1002, an extension section 1003 and a sleeve section 1006; the extension section 1003 is provided with an operation hole 1004 and a telescopic control thread 1005 to adapt to different length support distances. The extension section 1003 and the sleeve section 1006 can rotate freely around the rotating tray 1002, and the telescopic support rod 10 is used to support the constraint reinforcement structure to improve the reinforcement stability. When installing, first unscrew the extension section 1003 to a suitable length, connect the constraint connection blocks 1001 at both ends with the corresponding fixed position connection blocks, and then use a long rod to pass through the operation hole 1004 to tighten the extension section 1003 to complete the installation.

[0059] Adjacent beams (i.e. beams at 90°) connected to the same column can be connected and supported by telescopic support rods 10 between the upper and lower vertical plate support rod connection blocks 110 of their respective lower wing connection blocks 1, thereby realizing a constrained connection at the lower flange between adjacent beams of the reinforcement system.

[0060] like Fig.11 As shown, the beam-column connection block 11 is provided with a vertical plate 1101, a vertical plate bolt hole 1102, a stiffening rib 1103, a flange side connection plate 1104 and a flange side connection plate bolt hole 1105. When connected, the vertical plate 1101 is connected to the original web connection plate on the column by bolts, and the flange side connection plate 1104 is connected to the unit modular module through the side connection expansion hole 109, so as to realize the constrained connection between the beam and the column of the reinforcement system. The stiffening rib 1103 is used to strengthen the local strength of the beam-column connection block 11. The constrained connection can be set on one side or on both sides.

[0061] A reinforcement method implemented based on the reinforcement device in this embodiment includes:

[0062] S1, select the appropriate inner and outer plywood 3 and 5, and drill holes at the corresponding positions of the beams to be reinforced;

[0063] S2, install the beam-column connecting block 11, and connect the vertical plate 1101 bolts;

[0064] S3, place the lower wing connection block 1, so that the lower part of the outer clamp plate 5 is put in from the wider part of the clamp plate installation groove 101, so that the flange side connection plate 1104 passes through the side connection expansion hole 109, and the lower plane of the cover plate 502 on the outer clamp plate is flush with the lower wing connection block 1, and push the outer clamp plate 5 inward. As the clamp plate installation groove 101 becomes narrower, the outer clamp plate sliding groove 503 formed between the cover plate 502 on the outer clamp plate and the outer clamp plate lower support plate 504 is clamped on the upper plate of the lower wing connection block 1. After moving into place, the upper surface of the cover plate 502 on the outer clamp plate can support the lower part of the inner clamp plate 3, and the lower surface is located on the upper part of the lower wing connection block 1;

[0065] S4, connect the inner plate 3, the outer plate 5, the web connecting block 8 and the corresponding bolt holes of the steel beam web by bolts;

[0066] S5. Similar to the installation of the outer clamping plate 5, put the clamping plate limit block 2 into the wider part of the clamping plate installation groove 101, so that the limit block sliding groove 203 clamps the upper plate of the lower wing connecting block 1 and moves inward to the position, the lower surface of the limit block upper cover plate 202 is supported on the upper part of the lower wing connecting block 1, and the limit block lower support plate 204 supports the lower part of the outer clamping plate 5. The three are constrained and fixed with bolts through the bolt holes at the limit block upper cover plate 202 and the clamping plate limit block fixing bolt holes 103 corresponding to the upper part of the lower wing connecting block 1;

[0067] S6. Screw the screw 401 into the corresponding flange clamp mounting hole 102, insert the clamping block 405 from the bottom, tighten the connecting block 406, continue to screw the screw 401 downward to cooperate with the flange clamping groove 107 to clamp the lower flange of the steel beam, tighten the fastening nut 402 and the washer 403 to strengthen the constraint and fixation;

[0068] S7, repeat the above steps to complete the installation of other unit modular modules and web connecting blocks 8, and pass the lower connecting plate 6 of the same beam through the side connecting expansion hole 109, and clamp the side connecting plate 7 of the same beam between the lower vertical plates 108 on both sides, and connect the corresponding bolts;

[0069] S8. Install the telescopic support rods 10 at each position and tighten them to complete the installation of the entire steel beam reinforcement system.

[0070] Embodiment 2:

[0071] The present embodiment provides a lower flange clamping steel beam reinforcement method, using the lower flange clamping steel beam reinforcement device as described in Example 1, including: clamping the lower flange through the flange clamping groove, fixing it through the flange clamp mounting hole, and connecting the two lower wing connecting blocks on the corresponding sides through the lower vertical plate.

[0072] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A lower flange clamping steel beam reinforcement device, characterized in that: It includes a lower wing connection block, an inner clamping plate connected to the lower wing connection block, a telescopic support rod connected to the inner clamping plate, and a floor connection block connected to the telescopic support rod; The lower wing connecting block includes a flange clamping groove, a flange clamp mounting hole provided on the side plate of the flange clamping groove, and a lower vertical plate vertically fixed to the side plate of the flange clamping groove; the floor connecting block and the end of the lower wing connecting block away from the inner plywood, as well as the end of the floor connecting block and the inner plywood away from the lower wing connecting block are both connected with a telescopic support rod.

2. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: The side walls of the flange clamping groove are provided with a clamping plate mounting groove and a clamping plate limit block fixing bolt hole; in the flange clamping groove, the bottom surface of the vertical side wall is provided with a first side panel bolt mounting hole and a second side panel bolt mounting hole, and a side panel support rod connecting block is provided; the bottom of the flange clamping groove is provided with a side connection expansion hole; the lower vertical plate is provided with a lower vertical plate support rod connecting block.

3. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: A clamping plate limit block is arranged between the lower wing connecting block and the inner clamping plate; the clamping plate limit block includes a clamping plate slot and a limit block lower support plate, and a limit block upper cover plate is arranged at the clamping plate slot; a limit block lower support plate is arranged between the limit block lower support plate and the clamping plate slot.

4. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: A flange clamp is arranged in the flange clamp installation hole, and the flange clamp comprises a screw rod, a pressing plate and a clamping block arranged at the end of the screw rod, and a fastening nut and a washer arranged on the screw rod.

5. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: An outer splint is arranged between the inner splint and the telescopic support rod; an upper bolt hole is arranged at one end of the outer splint, and an outer splint upper cover plate and an outer splint lower support plate are arranged at the other end; an outer splint sliding groove is arranged between the outer splint upper cover plate and the outer splint lower support plate.

6. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: A lower connecting plate and a side connecting plate of the same beam are arranged in the middle of the lower vertical plates on both sides of the steel beam; bolt holes are arranged on the lower connecting plate of the same beam; and a first side connecting plate bolt hole without threads and a second side connecting plate bolt hole with threads are arranged on the side connecting plate of the same beam.

7. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: An outer plywood web connecting block is arranged between the inner plywood and the telescopic support rod; bolt holes and a support rod connecting block are arranged on the web connecting block.

8. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: The floor slab connection block comprises an inner support rod connection block, an outer support rod connection block and bolt holes; the inner support rod connection block and the outer support rod connection block are respectively connected to the inner clamping plate and the lower wing connection block through the telescopic support rod.

9. A lower flange clamping steel beam reinforcement device as claimed in claim 1, characterized in that: The telescopic support rod includes an extension section, a telescopic control thread arranged on the extension section, a sleeve section connected to the extension section through the telescopic control thread, a rotating tray respectively arranged on the extension section and the sleeve section, and a constraint connection block arranged on the rotating tray.

10. A method for reinforcing a lower flange clamped steel beam, characterized in that: A lower flange clamping steel beam reinforcement device as described in any one of claims 1 to 9 is used, comprising: the lower flange can be clamped through the flange clamping groove, fixed through the flange clamp mounting hole, and the two lower wing connecting blocks on the opposite sides are connected through the lower vertical plate.

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