Temporary fixing device for reinforcing lower flange of H-shaped steel beam

Abstract

The utility model discloses a temporary fixing device for reinforcing a lower flange of an H-shaped steel beam, which is characterized by comprising a plurality of temporary fixing components arranged along the length direction of the H-shaped steel beam, each temporary fixing component comprises a temporary fixing shell, a driven sliding block, a driving sliding block and a movable bolt; the temporary fixing shell is of a semi-closed shell structure, so that the lower flange of the H-shaped steel beam and the reinforcing component can be inserted into the temporary fixing shell; the driven sliding block and the driving sliding block are embedded in the temporary fixing shell in a sliding mode, and the driven sliding block and the driving sliding block are connected in a sliding fit mode and abut against the position between the bottom face of the reinforcing component and the bottom face of the inner wall of the temporary fixing shell, so that the reinforcing component is tightly attached to the bottom face of the lower flange of the H-shaped steel beam. The utility model relates to the technical field of building reconstruction, and can solve the problems that a jig frame or a supporting frame is inconvenient to arrange and the supporting stability of a reinforcing component cannot be ensured in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of building renovation, in particular to a temporary fixing device for strengthening the lower flange of an H-shaped steel beam. Background Technique

[0002] In renovation and strengthening projects, the lower flange of a steel beam is often strengthened to increase the bearing capacity of the original steel beam. At present, the most common way to strengthen the lower flange of an H-shaped steel beam is to weld a long strip steel plate or a long strip T-shaped steel below its lower flange. To ensure the welded connection between the lower flange strengthening member and the lower flange of the H-shaped steel beam, the conventional method is as follows: a falsework or a support frame is set below, and the long strip steel plate or the long strip T-shaped steel is jacked tightly against the lower surface of the lower flange of the H-shaped steel beam; then the worker welds the long strip steel plate or the long strip T-shaped steel that has been tightly attached to the lower flange of the H-shaped steel beam on the side operating frame.

[0003] The problems existing in the conventional method are as follows: it is rather troublesome to set a falsework or a support frame below the H-shaped steel beam, and since the strengthening members such as the long strip steel plate or the long strip T-shaped steel are generally arranged along the length direction of the H-shaped steel beam and have a long length, the length of the falsework or the support frame needs to be long, resulting in a high cost. If the falsework or the support frame is set according to the support points, although the cost and the construction volume can be reduced, it cannot ensure that each support point of the falsework or the support frame completely jacks the strengthening member tightly against the lower flange of the H-shaped steel beam, and there is a possibility of loosening during the construction process. Therefore, it is necessary to provide a temporary fixing device for strengthening the lower flange of an H-shaped steel beam, which can solve the problems of inconvenient setting of the falsework or the support frame in the prior art and the inability to ensure the support stability of the strengthening member. Summary of the Invention

[0004] The purpose of the utility model is to provide a temporary fixing device for strengthening the lower flange of an H-shaped steel beam, which can solve the problems of inconvenient setting of the falsework or the support frame in the prior art and the inability to ensure the support stability of the strengthening member.

[0005] The utility model is realized as follows:

[0006] A temporary fixing device for strengthening the lower flange of an H-shaped steel beam includes a plurality of temporary fixing members arranged along the length direction of the H-shaped steel beam. Each temporary fixing member includes a temporary fixing outer shell, a passive slider, an active slider and a movable pin; the temporary fixing outer shell is a semi-closed shell structure, enabling the lower flange of the H-shaped steel beam and the strengthening member to be inserted into the temporary fixing outer shell; the passive slider and the active slider are slidably installed in the temporary fixing outer shell, and the passive slider is in sliding fit with the active slider and is jacked tightly between the bottom surface of the strengthening member and the inner wall bottom surface of the temporary fixing outer shell, so that the strengthening member is tightly attached to the bottom surface of the lower flange of the H-shaped steel beam.

[0007] The described temporary fixing housing includes a top plate, a first side plate, a bottom plate, and a second side plate; the top plate, the first side plate, the bottom plate, and the second side plate are sequentially connected to form a semi-closed housing structure with openings at both ends, a partial opening at the top, and a partial opening at one side, enabling the lower flange of the H-shaped steel beam and the reinforcement member to be inserted into the semi-closed housing structure through the openings at the top and one side.

[0008] The top surface of the described passive slider is a planar structure and fits against the bottom surface of the reinforcement member, and the bottom surface of the passive slider is an inclined surface structure; the top surface of the active slider is an inclined surface structure and slidably fits with the inclined surface structure of the bottom surface of the passive slider, and the bottom surface of the active slider is a planar structure and fits against the top surface of the bottom plate of the temporary fixing housing, so that the passive slider and the active slider are clamped tightly between the bottom surface of the reinforcement member and the bottom plate of the temporary fixing housing.

[0009] A push rod is formed on one side of the described active slider. One end of the push rod is connected to the side surface with a larger thickness of the active slider, and the other end of the push rod slidably penetrates through a first through hole reserved on the first side plate of the temporary fixing housing and extends to the outside of the temporary fixing housing; the height of the first through hole matches the height of the push rod.

[0010] A number of first saw teeth are formed at intervals on the top surface of the described push rod, and a second saw tooth is formed at the bottom of one side of the movable pin. The second saw tooth is inserted and matched with one of the first saw teeth.

[0011] The first saw tooth and the second saw tooth are right triangle structures with the same size. The hypotenuse of the right triangle structure of the first saw tooth is inclined upward and outward of the temporary fixing housing, and the hypotenuse of the right triangle structure of the second saw tooth is inclined downward and inward of the temporary fixing housing, enabling the push rod to slide through the inserted first saw tooth and second saw tooth unidirectionally through the temporary fixing housing.

[0012] The described movable pin has an inverted J-shaped structure, enabling the other side of the movable pin to penetrate through a second through hole reserved on the first side plate of the temporary fixing housing and extend to the outside of the temporary fixing housing, and the movable pin slidably fits against the inner wall and the outer wall of the first side plate; the height of the second through hole is greater than the thickness of the horizontal section of the movable pin.

[0013] A cushion plate is provided between the top surface of the lower flange of the H-shaped steel beam and the bottom surface of the top plate of the temporary fixing housing, and a cushion plate is provided between the bottom surface of the reinforcement member and the top surface of the passive slider.

[0014] A number of wedge-shaped chutes are formed at intervals on the inner wall of the second side plate of the described temporary fixing housing, and a number of wedge-shaped sliders are formed at intervals on the side surface of the passive slider. The number of wedge-shaped sliders are respectively slidably fitted into the number of wedge-shaped chutes, enabling the passive slider to be slidably fitted into the temporary fixing housing in a liftable manner.

[0015] A sliding stop block is provided on the top surface of the bottom plate of the temporary fixing housing, and the active slider can be in contact connection with the sliding stop block.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Since the utility model is provided with a temporary fixing housing, an active slider and a passive slider, the temporary fixing housing can be sleeved on the lower flange of the H-shaped steel beam and the reinforcement member through the opening, and the upper extrusion of the reinforcement member is realized through the sliding fit of the inclined plane structure between the active slider and the passive slider, and the reaction force is provided by the top plate and the bottom plate of the temporary fixing housing to ensure the tightness of the reinforcement member on the bottom surface of the lower flange of the H-shaped steel beam. Moreover, the temporary fixing housings are arranged at intervals along the length direction of the lower flange of the H-shaped steel beam to ensure the multi-point positioning and temporary reinforcement effect of the reinforcement member along the length direction, and there is no need to set up a support frame or a falsework, which can reduce the workload and construction cost while ensuring the construction quality of the transformation and improve the construction efficiency.

[0018] 2. Since the utility model is provided with a push rod and a movable bolt, when the push rod is pushed into the temporary fixing housing, the relative sliding of the hypotenuse between the first serrations and the second serrations can be used to ensure the sliding push of the active slider. After the active slider tightly pushes up the passive slider, the vertical right-angle sides between the first serrations and the second serrations are used to resist and limit the outward sliding of the push rod, thereby effectively avoiding the loosening of the reinforcement member during the welding process and ensuring the temporary reinforcement stability effect of the reinforcement member, which is convenient for subsequent welding operations. Description of the Drawings

[0019] Figure 1 is a cross-sectional view of the temporary fixing device for reinforcing the lower flange of the H-shaped steel beam of the utility model (the reinforcement member is a long strip steel plate);

[0020] Figure 2 is a cross-sectional view of the temporary fixing device for reinforcing the lower flange of the H-shaped steel beam of the utility model (the reinforcement member is a T-shaped steel plate);

[0021] Figure 3 is a vertical connection schematic diagram of the temporary fixing housing and the passive slider in the temporary fixing device for reinforcing the lower flange of the H-shaped steel beam of the utility model;

[0022] Figure 4 is a plane connection schematic diagram of the temporary fixing housing and the passive slider in the temporary fixing device for reinforcing the lower flange of the H-shaped steel beam of the utility model;

[0023] Figure 5 is a connection schematic diagram of the active slider and the movable bolt in the temporary fixing device for reinforcing the lower flange of the H-shaped steel beam of the utility model.

[0024] In the figure, 1 is an H-shaped steel beam, 2 is a reinforcement member, 3 is a temporary fixing housing, 31 is a top plate, 32 is a first side plate, 33 is a bottom plate, 34 is a second side plate, 35 is a first through hole, 36 is a second through hole, 4 is a passive slider, 5 is an active slider, 51 is a first sawtooth, 52 is a push rod, 6 is a movable bolt, 61 is a second sawtooth, 7 is a backing plate, 8 is a wedge-shaped chute, 9 is a wedge-shaped slider, and 10 is a sliding stop block. Detailed implementation manners

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Please refer to the attached Figure 1 and the attached Figure 2 As shown, a temporary fixing device for reinforcing the lower flange of an H-shaped steel beam includes a plurality of temporary fixing members arranged along the length direction of the H-shaped steel beam 1. Each temporary fixing member includes a temporary fixing housing 3, a passive slider 4, an active slider 5, and a movable bolt 6. The temporary fixing housing 3 is a semi-closed shell structure, enabling the lower flange of the H-shaped steel beam 1 and the reinforcement member 2 to be inserted into the temporary fixing housing 3. The passive slider 4 and the active slider 5 are slidably installed in the temporary fixing housing 3, and the passive slider 4 is in sliding fit with the active slider 5 and abuts tightly between the bottom surface of the reinforcement member 2 and the inner bottom surface of the temporary fixing housing 3, so that the reinforcement member 2 is tightly attached to the bottom surface of the lower flange of the H-shaped steel beam 1.

[0027] Place the lower flange of the H-shaped steel beam 1 and the reinforcement member 2 into the temporary fixing housing 3, and use the relative sliding of the passive slider 4 and the active slider 5 to provide an upward tightening force for the reinforcement member 2. Use the top surface of the temporary fixing housing 3 to provide a downward tightening force for the lower flange of the H-shaped steel beam 1, and use the bottom surface of the temporary fixing housing 3 to provide a reaction force for the active slider 5, thereby ensuring the reinforcement and support effect between the lower flange of the H-shaped steel beam 1 and the reinforcement member 2, and preventing loosening during the welding construction process.

[0028] Arrange a plurality of temporary fixing members along the length direction of the H-shaped steel beam 1. The number and spacing of the temporary fixing members can be adaptively adjusted according to the actual temporary reinforcement requirements, thereby ensuring the fitting integrity and stability of the long strip-shaped reinforcement member 2 and the lower flange of the H-shaped steel beam 1. Moreover, there is no need to erect a support frame or a falsework, reducing the construction volume and lowering the construction cost.

[0029] The reinforcement member 2 can be a conventional long strip steel plate or a T-shaped steel plate. The long strip steel plate is directly attached to the bottom surface of the lower flange of the H-shaped steel beam 1. As shown in the attached Figure 1 figure, the vertical end of the T-shaped steel plate is attached to the bottom surface of the lower flange of the H-shaped steel beam 1, as shown in the attached Figure 2 figure.

[0030] The passive slider 4 and the active slider 5 can be integrally formed with a metal block.

[0031] Please see attached Figure 1 and attached Figure 2 The temporary fixed shell 3 includes a top plate 31, a first side plate 32, a bottom plate 33 and a second side plate 34; the top plate 31, the first side plate 32, the bottom plate 33 and the second side plate 34 are sequentially connected to form a semi-enclosed shell structure with openings at both ends, an opening at the top part and an opening on one side, so that the lower flange of the H-shaped steel beam 1 and the reinforcement member 2 can be inserted into the semi-enclosed shell structure through the openings at the top and one side.

[0032] The top plate 31, the first side plate 32, the bottom plate 33 and the second side plate 34 can be made of steel plates of corresponding sizes according to the sizes of the reinforcing member 2, the lower flange of the H-shaped steel beam 1, the active slider 5 and the passive slider 4. The top plate 31, the first side plate 32, the bottom plate 33 and the second side plate 34 can be welded to form an integrated structure.

[0033] Please see attached Figure 1 and attached Figure 2 The top surface of the passive slider 4 is a plane structure and is attached to the bottom surface of the reinforcement member 2, and the bottom surface of the passive slider 4 is an inclined structure; the top surface of the active slider 5 is an inclined structure and is slidably attached to the inclined structure of the bottom surface of the passive slider 4, and the bottom surface of the active slider 5 is a plane structure and is attached to the top surface of the bottom plate 33 of the temporary fixed shell 3, so that the passive slider 4 and the active slider 5 are pressed tightly between the bottom surface of the reinforcement member 2 and the bottom plate 33 of the temporary fixed shell 3.

[0034] By using the relative sliding of the inclined surface structure of the passive slider 4 and the active slider 5, the horizontal movement of the active slider 5 can be converted into the vertical movement of the passive slider 4, so that the reinforcement member 2 is pressed upward against the bottom surface of the lower flange of the H-shaped steel beam 1. The adjustment method is simple and efficient, and has high pressing adjustment accuracy and adaptability. At the same time, the top plate 312 and the bottom plate 33 are used to provide a reaction force to ensure the support and reinforcement reliability between the reinforcement member 2 and the bottom surface of the lower flange of the H-shaped steel beam 1.

[0035] Please see attached Figure 1 , Attachment Figure 2 and attached Figure 5 A push rod 52 is formed on one side of the active slider 5, one end of the push rod 52 is connected to the side surface of the active slider 5 with a larger thickness, and the other end of the push rod 52 slides through the first through hole 35 reserved on the first side plate 32 of the temporary fixed shell 3 and extends to the outside of the temporary fixed shell 3; the height of the first through hole 35 matches the height of the push rod 52.

[0036] The length direction of the push rod 52 is perpendicular to the length direction of the H-shaped steel beam 1. The push rod 52 passes through the first side plate 32. The push rod 52 can be used to push the active slider 5 inward, so as to control the lifting of the passive slider 4 by linkage with the inclined surface structure.

[0037] Please refer to the appendix Figure 5 , on the top surface of the push rod 52, a number of first saw teeth 51 are formed at intervals. At the bottom of one side of the movable bolt 6, a second saw tooth 61 is formed. The second saw tooth 61 is matched and inserted with one of the first saw teeth 51.

[0038] By using the matching insertion of the second saw tooth 61 in one of the first saw teeth 51, the push rod 52 can be locked to prevent accidental sliding of the push rod 52, so as to ensure reliable reinforcement of the reinforcement member 2 on the bottom surface of the lower flange of the H-shaped steel beam 1 during the welding process.

[0039] Please refer to the appendix Figure 5 , the first saw tooth 51 and the second saw tooth 61 are right triangle structures with the same size. The hypotenuse of the right triangle structure of the first saw tooth 51 is inclined upward to the outside of the temporary fixing housing 3, and the hypotenuse of the right triangle structure of the second saw tooth 61 is inclined downward to the inside of the temporary fixing housing 3, so that the push rod 52 can slide through the temporary fixing housing 3 unidirectionally through the inserted first saw tooth 51 and second saw tooth 61.

[0040] In the pushing direction of the push rod 52 into the temporary fixing housing 3, the first saw tooth 51 and the second saw tooth 61 can slide relative to each other by using the hypotenuse of the right triangle structure, so as to ensure the inward pushing function of the push rod 52 until the passive slider 4 rises to tightly press against the reinforcement member 2 on the bottom surface of the lower flange of the H-shaped steel beam 1.

[0041] In the pulling direction of the push rod 52 out of the temporary fixing housing 3, the first saw tooth 51 and the second saw tooth 61 can be limited by using the vertical right-angle sides of the right triangle structure to abut against each other, so as to prevent the reverse movement of the push rod 52, and further ensure that the situation of relaxation between the reinforcement member 2 and the bottom surface of the lower flange of the H-shaped steel beam 1 does not occur during the welding process.

[0042] Please refer to the appendix Figure 5 , the movable bolt 6 has an inverted J-shaped structure, so that the other side of the movable bolt 6 passes through the second through hole 36 reserved on the first side plate 32 of the temporary fixing housing 3 and extends to the outside of the temporary fixing housing 3, and the movable bolt 6 is slidably attached to the inner wall and the outer wall of the first side plate 32; the height of the second through hole 36 is greater than the thickness of the horizontal section of the movable bolt 6.

[0043] By using the sliding fit between the two vertical sections of the movable bolt 6 and the inner wall and the outer wall of the first side plate 32, when the push rod 52 is pushed inward, the movable bolt 6 can slide up and down relative to the first side plate 32 under the transmission between the first saw tooth 51 and the second saw tooth 61, improving the up and down sliding stability of the movable bolt 6.

[0044] Preferably, a spring can be arranged in the second through hole 36 to press the movable bolt 6 downward through the spring, ensuring the downward reset of the movable bolt 6 after it is jacked up, and further ensuring the one-way locking function of the second saw teeth 61 on the push rod 52.

[0045] Since the height of the second through hole 36 is greater than the thickness of the horizontal section of the movable bolt 6, the up-and-down sliding requirements of the movable bolt 6 can be met. At the same time, when disassembling the temporary fixing shell 3, the movable bolt 6 is manually pushed upward to disengage the second saw teeth 61 from the first saw teeth 51, so that the push rod 52 can be pulled outwards, the active slider 5 is released from pressing the passive slider 4, and then the temporary fixing shell 3 can be removed from the lower flange of the reinforcing member 2 and the H-shaped steel beam 1 after welding is completed.

[0046] Please refer to the attached Figure 1 and the attached Figure 2 , a cushion plate 7 is provided between the top surface of the lower flange of the H-shaped steel beam 1 and the bottom surface of the top plate 31 of the temporary fixing shell 3, and a cushion plate 7 is provided between the bottom surface of the reinforcing member 2 and the top surface of the passive slider 4.

[0047] Preferably, the cushion plate 7 can be made of materials such as rubber, having certain elasticity and friction force, to further ensure the temporary reinforcement reliability and stability between the reinforcing member 2 and the lower flange of the H-shaped steel beam 1.

[0048] Please refer to the attached Figure 3 and the attached Figure 4 , a plurality of wedge-shaped chutes 8 are formed at intervals on the inner wall of the second side plate 34 of the temporary fixing shell 3, and a plurality of wedge-shaped sliders 9 are formed at intervals on the side surface of the passive slider 4. The plurality of wedge-shaped sliders 9 are respectively slidably fitted in the plurality of wedge-shaped chutes 8, so that the passive slider 4 can be slidably fitted in the temporary fixing shell 3 in a liftable manner.

[0049] The vertically arranged wedge-shaped chutes 8 provide guidance and limit for the wedge-shaped sliders 9, thereby ensuring that the passive slider 4 can only move up and down vertically, improving the sliding stability of the passive slider 4, and ensuring the pressing effect of the passive slider 4 on the reinforcing member 2.

[0050] The wedge-shaped chutes 8 and the wedge-shaped sliders 9 are arranged in pairs, and the number and arrangement spacing of the wedge-shaped chutes 8 and the wedge-shaped sliders 9 can be adjusted adaptively according to actual needs.

[0051] Please refer to the attached Figure 1 and the attached Figure 2 , a sliding stop block 10 is provided on the top surface of the bottom plate 33 of the temporary fixing shell 3, and the active slider 5 can be in contact connection with the sliding stop block 10.

[0052] The sliding block 10 is used to limit the inward sliding range of the active slider 5, preventing the push rod from being completely pushed into the temporary fixing housing 3. Preferably, the sliding block 10 can be arranged along the entire length of the temporary fixing housing 3 to ensure the sliding limit effect on the active slider 5.

[0053] Please refer to the attached drawings to the attached Figure 5 , the usage method and working principle of the present utility model are as follows:

[0054] Attach the reinforcement member 2 to the bottom surface of the lower flange of the H-shaped steel beam 1, tilt the temporary fixing housing 3 with the passive slider 4 and the active slider 5, and sleeve it onto the lower flange of the H-shaped steel beam 1 and the reinforcement member 2 through the openings at the top and one side of the temporary fixing housing 3, so that the lower flange of the H-shaped steel beam 1 and the reinforcement member 2 are placed inside the temporary fixing housing 3.

[0055] After the temporary fixing housing 3 is sleeved onto the lower flange of the H-shaped steel beam 1 and the reinforcement member 2, the two cushion plates 7 can be inserted into the temporary fixing housing 3 from the end, so that the cushion plates 7, the lower flange of the H-shaped steel beam 1, the reinforcement member 2, the cushion plates 7, the passive slider 4 and the active slider 5 are stacked in sequence from top to bottom between the top plate 31 and the bottom plate 33 of the temporary fixing housing 3.

[0056] Push the push rod 52 inward, so that the active slider 5 moves inward and drives the passive slider 4 to move upward by using the inclined surface structure. The passive slider 4 moves stably upward through the wedge-shaped chute 8 and the wedge-shaped slider 9 until the reinforcement member 2 is stably pressed against the bottom surface of the lower flange of the H-shaped steel beam 1. At the same time, insert the second serration 61 of the movable bolt 6 into one of the first serrations 51, use the force of the stacked and pressed layers between the cushion plate 7, the lower flange of the H-shaped steel beam 1, the reinforcement member 2, the cushion plate 7, the passive slider 4 and the active slider 5 to limit the inward movement of the push rod 52, and use the vertical right-angle sides of the second serration 61 and the first serration 51 to resist each other to limit the outward movement of the push rod 52, thereby locking the push rod 52.

[0057] The above completes the temporary reinforcement operation of a temporary fixing member on the reinforcement member 2 on the lower wing plate of the H-shaped steel beam 1. Repeat the above steps and arrange multiple temporary fixing members in sequence along the length direction of the lower wing plate of the H-shaped steel beam 1. After the temporary fixing members are arranged, the welding operation of the lower wing plate of the H-shaped steel beam 1 and the reinforcement member 2 can be carried out.

[0058] The above is only the preferred embodiment of the present utility model, and is not used to limit the protection scope of the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A temporary fixing device for reinforcing the lower flange of an H-shaped steel beam, characterized in that: The invention comprises a plurality of temporary fixing components arranged along the length direction of an H-shaped steel beam (1), each of which comprises a temporary fixing shell (3), a passive slider (4), an active slider (5) and a movable latch (6); the temporary fixing shell (3) is a semi-enclosed shell structure, so that the lower flange of the H-shaped steel beam (1) and the reinforcing component (2) can be inserted into the temporary fixing shell (3); the passive slider (4) and the active slider (5) are slidably embedded in the temporary fixing shell (3), and the passive slider (4) and the active slider (5) are slidably connected and pressed between the bottom surface of the reinforcing component (2) and the bottom surface of the inner wall of the temporary fixing shell (3), so that the reinforcing component (2) is pressed against the bottom surface of the lower flange of the H-shaped steel beam (1).

2. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 1 is characterized in that: The temporary fixed shell (3) comprises a top plate (31), a first side plate (32), a bottom plate (33) and a second side plate (34); the top plate (31), the first side plate (32), the bottom plate (33) and the second side plate (34) are sequentially connected to form a semi-enclosed shell structure with openings at both ends, an opening at the top part and an opening at one side, so that the lower flange of the H-shaped steel beam (1) and the reinforcing member (2) can be inserted into the semi-enclosed shell structure through the openings at the top and one side.

3. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 2 is characterized in that: The top surface of the passive slider (4) is a plane structure and is attached to the bottom surface of the reinforcing member (2), and the bottom surface of the passive slider (4) is an inclined structure; the top surface of the active slider (5) is an inclined structure and is slidably attached to the inclined structure of the bottom surface of the passive slider (4), and the bottom surface of the active slider (5) is a plane structure and is attached to the top surface of the bottom plate (33) of the temporary fixed shell (3), so that the passive slider (4) and the active slider (5) are pressed tightly between the bottom surface of the reinforcing member (2) and the bottom plate (33) of the temporary fixed shell (3).

4. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 3 is characterized in that: A push rod (52) is formed on one side of the active slider (5), one end of the push rod (52) is connected to a thicker side surface of the active slider (5), and the other end of the push rod (52) slides through a first through hole (35) reserved on a first side plate (32) of the temporary fixed shell (3) and extends to the outside of the temporary fixed shell (3); the height of the first through hole (35) matches the height of the push rod (52).

5. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 4 is characterized in that: A plurality of first saw teeth (51) are formed at intervals on the top surface of the push rod (52), and a second saw tooth (61) is formed on the bottom of one side of the movable latch (6), and the second saw tooth (61) is matched and plugged with one of the first saw teeth (51).

6. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 5 is characterized in that: The first sawtooth (51) and the second sawtooth (61) are right-angled triangle structures of the same size. The hypotenuse of the right-angled triangle structure of the first sawtooth (51) is arranged to be inclined upward outside the temporary fixing shell (3), and the hypotenuse of the right-angled triangle structure of the second sawtooth (61) is arranged to be inclined downward inside the temporary fixing shell (3), so that the push rod (52) can slide unidirectionally through the temporary fixing shell (3) by means of the inserted first sawtooth (51) and the second sawtooth (61).

7. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 2 is characterized in that: The movable latch (6) is in an inverted J-shaped structure, so that the other side of the movable latch (6) passes through the second through hole (36) reserved on the first side plate (32) of the temporary fixing shell (3) and extends to the outside of the temporary fixing shell (3), and the movable latch (6) is slidably fitted to the inner wall and the outer wall of the first side plate (32); the height of the second through hole (36) is greater than the thickness of the horizontal section of the movable latch (6).

8. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 2 is characterized in that: A pad (7) is provided between the top surface of the lower flange of the H-shaped steel beam (1) and the bottom surface of the top plate (31) of the temporary fixed shell (3), and a pad (7) is provided between the bottom surface of the reinforcement component (2) and the top surface of the passive slider (4).

9. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 2 is characterized in that: A plurality of wedge-shaped slide grooves (8) are formed at intervals on the inner wall of the second side plate (34) of the temporary fixed shell (3), and a plurality of wedge-shaped slide blocks (9) are formed at intervals on the side surface of the passive slide block (4). The plurality of wedge-shaped slide blocks (9) are respectively slidably embedded in the plurality of wedge-shaped slide grooves (8), so that the passive slide block (4) can be lifted and slidably embedded in the temporary fixed shell (3).

10. The temporary fixing device for reinforcing the lower flange of an H-shaped steel beam according to claim 2, characterized in that: A sliding block (10) is provided on the top surface of the bottom plate (33) of the temporary fixed shell (3), and the active sliding block (5) can be connected with the sliding block (10) in abutting manner.

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