Light steel lifting hook under original structure concrete floor and construction method of light steel lifting hook

Abstract

The invention discloses an original structure concrete floor lower light steel lifting hook which comprises an upper fixing plate and a U-shaped lifting hook fixedly connected with the upper fixing plate, the upper fixing plate is located above a floor, a circular ring part of the U-shaped lifting hook is located below the floor, and two end rods of the U-shaped lifting hook penetrate through the floor to be fixedly connected with the upper fixing plate; the end of the end rod is not higher than the upper surface of the upper fixing plate. According to the light steel lifting hook under the original structure concrete floor, a rod can be fixed on the floor, and equipment can be lifted without a steel structure.

Description

Technical Field

[0001] The invention relates to the field of hook installation, and in particular to a light steel hook under an original structural concrete floor slab and a construction method thereof. Background Art

[0002] With the development of society and the optimization and improvement of production capacity, small and medium-sized equipment are more widely used in industrial production, and some small and medium-sized equipment require regular lifting, inspection and maintenance.

[0003] Chinese patent number 202420236575.2 discloses a steel structure hook component comprising an H-shaped steel beam and a U-bolt connected to the H-shaped steel beam. The U-bolt comprises an arc-shaped hook portion at the bottom, a plug portion connected to both ends above the arc-shaped hook portion, and a bolt connection portion welded to the top of the plug portion. The two plug portions vertically penetrate the upper and lower plates on either side of the vertical plate of the H-shaped steel beam, respectively. The arc-shaped hook portion is located below the lower plate, and the bolt connection portion is located above the upper plate. A positioning steel plate is provided above the upper plate for penetrating the two bolt connections. The bolt connection portion is locked with a nut. Two sets of stiffening ribs are provided parallel between the upper and lower plates on either side of the vertical plate. The two stiffening ribs on one side of the vertical plate are perpendicular to the vertical plate and supported on both sides of the U-bolt. This steel structure hook component can provide a lifting point for equipment lifting.

[0004] However, in the above technology, the hook needs to be fixed and bear the load with the help of an H-shaped steel beam. If the hoisting position on site is not located below the H-shaped steel beam, the hook cannot be set. Summary of the Invention

[0005] The purpose of the present invention is to provide a light steel hook under the original structure concrete floor and a construction method thereof. The light steel hook under the original structure concrete floor can fix the rod on the floor and can lift the equipment without the help of steel structure.

[0006] To achieve the above-mentioned object, the present invention provides a light steel hook under the original structural concrete floor, comprising an upper fixing plate and a U-shaped hook fixedly connected to the upper fixing plate, wherein the upper fixing plate is located above the floor, the circular ring portion of the U-shaped hook is located below the floor, and the two end rods of the U-shaped hook pass through the floor and are fixedly connected to the upper fixing plate;

[0007] The ends of the end rods are not higher than the upper surface of the upper fixing plate.

[0008] Preferably, the upper fixing plate is provided with two fixing holes, and the two end rods of the U-shaped hook are fixedly connected to the two fixing holes respectively.

[0009] Preferably, the light steel hook under the original structural concrete floor further includes a lower fixing plate, the lower fixing plate is provided with two fixing holes, and the two end rods of the U-shaped hook are fixedly connected to the two fixing holes respectively.

[0010] The present invention also provides a construction method for the light steel hook under the original structural concrete floor, comprising:

[0011] Step 1: Drill two rebar holes at the corresponding positions of the floor slab according to the location of the lifting point;

[0012] Step 2: Fix the end rods of the U-shaped hook to the two anchor holes of the floor slab by chemical anchoring.

[0013] Step 3: Place the upper fixing plate corresponding to the location of the anchor hole;

[0014] Step 4: Fix the U-shaped hook and the upper fixing plate by plug welding.

[0015] Preferably, in step 2, the chemical rebar planting process includes:

[0016] 2.1 Clean the dust in the planting hole to ensure that the hole is dry and free of debris;

[0017] 2.2 Inject the anchor glue into the anchor hole and push the U-shaped hook upward from the bottom of the anchor hole;

[0018] 2.3 Let it stand and wait for the anchor glue to solidify.

[0019] Preferably, in 2.2, the lower end of the anchor hole is first sealed with a flat plug, and then the anchor glue is injected into the anchor hole.

[0020] Preferably, in 2.2, the two end rods of the U-shaped hook are respectively provided with sleeves for shielding the ends of the U-shaped hook, and the bottom of the sleeve is matched with the end of the U-shaped hook.

[0021] Preferably, the height of the sleeve corresponds to the length of the through-hole plug weld of the end rod.

[0022] Preferably, in 2.2, firstly apply anchoring glue to the chemical anchoring section of the U-shaped hook, then pass the U-shaped hook upward from the bottom of the anchoring hole, and finally inject the anchoring glue into the anchoring hole.

[0023] Preferably, a length for perforation plug welding needs to be reserved when applying the anchor glue.

[0024] According to the above technical solution, the present invention sets the upper fixed plate above the floor, and the U-shaped hook passes through the floor and is fixedly connected to the upper fixed plate, so that the U-shaped hook can be fixed in relative position with the floor. At the same time, the circular ring part located below the floor can be used to lift small equipment.

[0025] Since the end of the end rod is not higher than the upper surface of the upper fixing plate, there will be no protruding nuts or other structures above the floor slab. Only the upper fixing plate is slightly higher than the upper surface of the floor slab, and the height of the upper fixing part is usually 16-20mm, which does not affect the traffic above the floor slab. Therefore, the light steel hook under the original structure concrete floor slab can not only achieve the purpose of setting a lifting point at the floor slab position, but also setting the lifting point will not affect the traffic above the floor.

[0026] In one embodiment, the two end rods are plug-welded with holes on the upper fixing plate to ensure the connection strength between the upper fixing plate and the U-shaped hook. After the plug-welding, the height of the welding position will not be significantly higher than the upper fixing plate. At the same time, the two end rods are connected to the floor slab by chemical anchoring, which can further improve the connection strength between the U-shaped hook and the floor slab, thereby maximizing the structural strength of the hook, the floor slab and the upper fixing plate, and greatly improving the stability of the U-shaped hook during operation.

[0027] Because the lightweight steel hooks under the original concrete floor can be fixed directly to the floor, independent of steel beams, they can be conveniently installed in areas without steel beams within the production plant for lifting equipment. Furthermore, the U-shaped hooks are secured to the upper fixing plate and floor through perforated welding and chemically embedded rebar, significantly increasing the hook's load capacity and ensuring its stability during long-term use.

[0028] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a structural diagram of a light steel hook under the original structural concrete floor;

[0031] Figure 2 This is a distribution diagram of light steel hooks under the original structural concrete floor;

[0032] Figure 3 It is a structural diagram of a light steel hook under the original structural concrete floor;

[0033] Figure 4 It is a structural diagram of a light steel hook under the original structural concrete floor;

[0034] Figure 5 yes Figure 4 AA cross-section diagram.

[0035] Description of Reference Numerals

[0036] 1 Upper fixed plate 21 annular portion

[0037] 22 end rod 11 fixing hole

[0038] 3 lower fixed plate 4 floor plate

[0039] 41 anchor hole 51 fixing rod

[0040] 52 diagonal brace DETAILED DESCRIPTION

[0041] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0042] In the present invention, unless otherwise stated, directional words such as "above, below, upward, lower end, bottom" contained in the term only represent the direction of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0043] See also Figures 1-5 The light steel hook under the original structural concrete floor comprises an upper fixing plate 1 and a U-shaped hook fixedly connected to the upper fixing plate 1, wherein the upper fixing plate 1 is located above the floor slab 4, the circular ring portion 21 of the U-shaped hook is located below the floor slab 4, and the two end rods 22 of the U-shaped hook pass through the floor slab 4 and are fixedly connected to the upper fixing plate 1;

[0044] The end of the end rod 22 is not higher than the upper surface of the upper fixing plate 1 .

[0045] Through the implementation of the above technical solution, the upper fixed plate 1 is set above the floor 4, and the U-shaped hook passes through the floor 4 and is fixedly connected to the upper fixed plate 1, so that the U-shaped hook can be fixed in relative position with the floor 4. At the same time, the circular ring part 21 located below the floor 4 can be used to lift small equipment.

[0046] Since the end of the end rod 22 is not higher than the upper surface of the upper fixed plate 1, there will be no protruding nuts or other structures above the floor slab 4. Only the upper fixed plate 1 is slightly higher than the upper surface of the floor slab 4, and the height of the upper fixing part is usually 16-20 mm, which does not affect the traffic above the floor slab. Therefore, the light steel hook under the original structure concrete floor slab can not only achieve the purpose of setting a lifting point at the floor slab position, but also setting the lifting point will not affect the traffic above the floor slab 4.

[0047] In one embodiment, the two end rods 22 are plug-welded with the upper fixed plate 1 to ensure the connection strength between the upper fixed plate 1 and the U-shaped hook. After the plug-welding, the height of the welding position will not be significantly higher than the upper fixed plate 1. At the same time, the two end rods 22 are connected to the floor slab 4 by chemical anchoring, which can further improve the connection strength between the U-shaped hook and the floor slab 4, so that the structural strength of the hook, the floor slab 4 and the upper fixed plate 1 is maximized, greatly improving the stability of the U-shaped hook during operation.

[0048] Because the lightweight steel hook under the original concrete floor can be directly fixed to the floor 4 without relying on steel beams, it can be set up in places without steel beams in the production plant for lifting equipment, which is very convenient. In addition, the U-shaped hook is fixed to the upper fixing plate 1 and the floor 4 respectively through perforated welding and chemical anchoring, which greatly improves the load capacity of the hook and ensures the stability of the hook during long-term use.

[0049] In this embodiment, preferably, the upper fixing plate 1 is provided with two fixing holes 11 , and the two end rods 22 of the U-shaped hook are fixedly connected to the two fixing holes 11 respectively.

[0050] The two end rods 22 are matched with the two fixing holes 11 and fixed by plug welding. After welding, the connection strength between the two end rods 22 and the fixing holes 11 can meet the lifting load requirement.

[0051] In one embodiment, the U-shaped hook is fixed to the upper fixing plate 1 by plug welding. At this time, all the loads during the operation of the U-shaped hook are borne by the upper fixing plate 1. The strength of the upper fixing plate 1 or the connecting weld is the main factor limiting the load-bearing range of the U-shaped hook.

[0052] In one embodiment, the U-shaped hook is fixed to the upper fixing plate 1 by perforated plug welding, and the two end rods 22 are connected to the floor slab 4 by chemical anchoring. At this time, the load during the operation of the U-shaped hook is shared by the floor slab 4 and the upper fixing plate 1. At this time, the load-bearing range of the U-shaped hook is larger. If a 16mm thick upper fixing plate 1 is used, the load-bearing capacity of the U-shaped hook can reach approximately 1-2 tons.

[0053] In this embodiment, preferably, the light steel hook under the original structural concrete floor further includes a lower fixing plate 3 , which is provided with two fixing holes 11 , and the two end rods 22 of the U-shaped hook are fixedly connected to the two fixing holes 11 respectively.

[0054] By arranging the lower fixing plate 3 and the upper fixing plate 1 on both sides of the floor slab respectively, the structural strength of the floor slab 4 can be increased. At the same time, it is also beneficial to ensure the stability of the U-shaped hook during use, avoid generating more dynamic loads during work, and avoid the impact on the light steel hook under the original structural concrete floor slab.

[0055] In one embodiment, the U-shaped hook is fixed to the upper fixing plate 1 by through-hole plug welding, and the two end rods 22 are connected to the floor slab 4 by chemical anchoring, and a lower fixing plate 3 is arranged below the floor slab 4. The lower fixing plate 3 and the upper fixing plate 1 clamp the middle floor slab 4, and the two end rods 22 pass through the fixing holes 11 of the lower fixing plate 3 and the upper fixing plate 1 in turn, and are respectively connected to the lower fixing plate 3 and the upper fixing plate 1. In this way, the load-bearing range of the U-shaped hook is larger. If a 16mm thick upper fixing plate is used, the load-bearing range of the U-shaped hook can reach approximately 2-3 tons.

[0056] The present invention also provides a construction method for a light steel hook under an original structural concrete floor slab, comprising:

[0057] Step 1: Drill two anchor holes 41 at corresponding positions of the floor slab 4 according to the location of the lifting point;

[0058] Step 2: fix the end rods 22 of the U-shaped hook to the two anchor holes 41 of the floor slab 4 respectively by chemical anchoring;

[0059] Step 3, placing the upper fixing plate 1 corresponding to the position of the anchor hole 41;

[0060] Step 4: Fix the U-shaped hook and the upper fixing plate 1 by plug welding.

[0061] At the location where the equipment needs to be hoisted, the hoisting position is reasonably designed, and the positions of the two anchor holes 41 are determined based on the hoisting point position. After the positions of the anchor holes 41 are determined, the anchor holes 41 can be drilled on the floor slab.

[0062] Afterwards, the two end rods 22 are fixed in the anchor holes 41 respectively by chemical anchoring, and then the upper fixing plate 1 is placed corresponding to the position of the anchor hole 41, and finally the U-shaped hook is fixed to the upper fixing plate 1 by perforation plug welding.

[0063] When drilling the anchor bolt hole 41 , the brick needs to be kept in a vertical direction so that the direction of the drilled anchor bolt hole 41 is consistent with the working direction of the end rod 22 , thereby ensuring that the force on the end rod 22 is more reasonable and conducive to the reliable operation of the end rod 22 .

[0064] During the process of fixing the end rod 22 , it is necessary to keep the end rod 22 parallel to the axis of the anchor hole 41 . Preferably, the end rod 22 is kept aligned with the axis of the anchor hole 41 .

[0065] When the end rod 22 passes through the rebar hole 41, the height of the end rod 22 protruding from the upper surface of the floor slab 4 should be adapted to the length of the piercing plug welding, so that after the piercing plug welding is completed, the end rod 22 will not protrude from the upper fixed plate 1, thereby reducing the impact of the light steel hook under the original structural concrete floor slab on the road traffic above the floor slab.

[0066] In this embodiment, preferably, in step 2, the chemical rebar planting process includes:

[0067] 2.1 Clean the dust in the anchor hole 41 to ensure that the anchor hole 41 is dry and free of debris;

[0068] 2.2 Inject the anchoring glue into the anchoring hole 41 and push the U-shaped hook upward from the bottom of the anchoring hole 41;

[0069] 2.3 Let it stand and wait for the anchor glue to solidify.

[0070] First, the dust in the anchor hole 41 is cleaned to ensure the reliability of the connection between the U-shaped hook and the floor slab 4 after chemical anchoring.

[0071] The anchoring glue is injected into the anchoring hole 41, and the filling height of the anchoring glue in the anchoring hole 41 is not less than 2 / 3 of the height of the anchoring hole 41, so that after the end rod 22 passes through the anchoring hole 41, it can push the anchoring glue to fill the anchoring hole 41. Preferably, a plate is provided at the bottom of the anchoring hole 41 to seal the bottom of the anchoring hole 41, thereby effectively injecting the anchoring glue into the anchoring hole 41. Since the anchoring glue is usually very viscous, after the anchoring glue is injected, the sealing plate is removed, and then the end rod 22 is inserted into the anchoring hole 41 from bottom to top. In the process of pushing the rod U-shaped hook, the anchoring glue will also be pushed upward until the U-shaped hook leaks out of the floor 4 by a certain length. This part of the end rod 22 is used for perforation welding with the upper fixed plate 1. After the end rod 22 is exposed, some of the anchor glue will overflow from the anchor hole 41. At this time, fix the U-shaped hook and let it stand for a while until the anchor glue solidifies. The U-shaped hook can then maintain a relatively stable position with the anchor hole 41.

[0072] Finally, the upper fixing member 1 is fixed to the U-shaped hook to complete the construction of the light steel hook under the original structural concrete floor.

[0073] In this embodiment, preferably, in 2.2, the lower end of the anchor hole 41 is first sealed with a flat plug, and then the anchor glue is injected into the anchor hole 41.

[0074] In one embodiment, the lower end of the dowel hole 41 is first closed by a flat plug made of steel plate, paperboard or other flat plug capable of plugging the lower end of the dowel hole 41, and then the dowel hole 41 can be injected with glue using a glue injection tool. During glue injection, the glue injection nozzle extends to the bottom of the dowel hole 41, and the height of the glue injection is not less than 2 / 3 of the height of the dowel hole 41. After the glue injection is completed, the flat plug is removed, and the two end rods 22 are inserted into the dowel hole 41 from below the dowel hole 41, and the chemical dowel operation is completed after a period of standing. The flat plug does not enter the dowel hole 41 and does not affect the glue injection into the dowel hole 41.

[0075] In this way, if the end rod 22 is directly inserted through the dowel hole 41, the end of the end rod 22 will be adhered with dowel glue, and the dowel glue adhered to the surface of the end rod 22 will affect the welding effect of the hole plug welding, so the end of the end rod 22 needs to be treated to remove the dowel glue.

[0076] In this embodiment, preferably, in 2.2, the two end rods 22 of the U-shaped hook are respectively sleeved with sleeves for shielding the ends of the U-shaped hook, and the bottom of the sleeve cooperates with the end of the U-shaped hook.

[0077] The bottom of the sleeve abuts against the top surface of the end rod 22 to realize the relative fixation of the sleeve and the end rod 22. During the process of inserting through the dowel hole 41, the sleeve can cover and shield the end rod 22. During the process of inserting the end rod 22 through the dowel hole 41, the sleeve can shield the top end of the end rod 22 to avoid the contamination of the end of the end rod 22 by the dowel glue.

[0078] Preferably, the surface of the end rod 22 is provided with threads, which can increase the surface area of the contact position between the end rod 22 and the dowel glue, so that the combination between the end rod 22 and the floor is more reliable after the chemical dowel is completed.

[0079] The surface of the circular ring part 21 is smooth to avoid the abrasion of the hoisting rope by the circular ring part 21 during hoisting.

[0080] Preferably, the sleeve tightly cooperates with the end rod 22 to avoid the separation of the sleeve and the end rod 22 during the process of inserting the end rod 22 through the dowel hole 41, which causes the end of the end rod 22 to be contaminated by the dowel glue.

[0081] In this embodiment, preferably, the height of the sleeve is consistent with the length of the hole plug welding of the end rod 22.

[0082] Under the protection of the sleeve, the part of the end rod 22 for hole plug welding will not be adhered with the dowel glue, so that the process of removing the dowel glue by manual labor can be saved, which is beneficial to improve the construction efficiency.

[0083] The sleeve is set to be consistent with the length of the piercing plug welding. Then, by observing the relative position of the sleeve and the floor slab 4, it is possible to determine whether the U-shaped hook is in place in the height direction, which is beneficial to improving the position accuracy of the U-shaped hook.

[0084] In this embodiment, preferably, in 2.2, firstly, the rebar embedding glue is applied to the chemical rebar embedding section of the U-shaped hook, then the U-shaped hook is passed upward from the bottom of the rebar embedding hole 41, and finally, the rebar embedding glue is injected into the rebar embedding hole 41.

[0085] In one embodiment, anchoring glue is first applied to the position where the end rod 22 cooperates with the anchoring hole 41 so that the anchoring glue can be reliably attached to the end rod 22. Then, the end rod 22 is inserted into the anchoring hole 41 from the bottom of the anchoring hole 41. Since no glue has been injected into the anchoring hole 41 at this time, the end of the end rod 22 will not be contaminated by the anchoring glue.

[0086] The end rod 22 is fixed by using the thread of the end rod 22. In one embodiment, a fixing nut is provided to cooperate with the thread of the end rod 22, and a horizontal plate is placed under the nut, which cooperates with the upper surface of the floor 4. The ends of the two end rods 22 are both equipped with nuts, and two through holes are provided on the horizontal plate, and the two end rods 22 pass through the two through holes respectively. In this way, the horizontal plate can fix the U-shaped hook in the height direction, and then the two end rods 22 can be fixed in a position coaxial with the two anchor holes 41 by adjusting the horizontal plate. Preferably, in order to ensure the relative position of the two adjusted end rods 22 and the anchor holes 41, it is necessary to fix the horizontal plate above the floor 4 to avoid displacement of the end rods 22 during the glue injection process.

[0087] After the two end rods 22 are fixed in position, glue can be injected into the rebar holes 41. Insert the glue tool to the top of the rebar hole 41 and press it against the horizontal plate to inject glue. Use a relatively thin glue injection nozzle and control the glue injection nozzle to move at a constant speed around the outer periphery of the end rods 22. While moving, glue is injected so that the rebar glue can reliably fill the gap between the end rods 22 and the rebar hole 41.

[0088] After one circle around the end rod 22, the glue injection nozzle is moved downward to fill the next height of the rebar hole 41. Each height position needs to be circled around the end rod 22 once. At the same time, when controlling the glue injection nozzle to move downward, it is also necessary to control the glue injection nozzle and the rebar glue in the rebar hole 41 to not separate, that is, the glue injection nozzle is always immersed in the rebar glue to avoid the rebar glue from being broken.

[0089] Inject the anchoring glue until it overflows the anchoring hole 41.

[0090] After filling with the rebar embedding glue, let it stand for a while and then remove the nut on the top of the end rod 22. Then place the upper fixing plate 1 and weld the upper fixing plate 1 to the U-shaped hook and the horizontal plate for fixing by perforation plug welding.

[0091] Since the anchor glue will fix the fixed horizontal plate to the end rod 22 and it is difficult to remove, the fixed horizontal plate 1 is set to a material that can be welded with the upper fixed plate 1. During the perforated plug welding process, the upper fixed plate is welded and fixed together with the horizontal plate and the end of the end rod 22.

[0092] In this embodiment, preferably, a length for perforation plug welding needs to be reserved when applying the anchor glue.

[0093] When applying the anchor glue, the length of the perforated plug weld needs to be reserved. The anchor glue cannot exceed the lowest position of the perforated plug weld upwards to avoid the anchor glue contaminating the end of the end rod 22 and ensure the quality of the perforated plug weld between the end of the end rod 22 and the upper fixed plate 1.

[0094] When the lightweight steel hook under the existing concrete floor structure includes a lower fixing plate 3, it needs to clamp the floor slab 4 together with the upper fixing plate 2. Since the upper fixing plate 1 and the floor slab 4 are the primary load-bearing components, conventional welding between the lower fixing plate 3 and the end rod 22 is sufficient. The clamping action of the lower fixing plate 3 and the upper fixing plate 1 on the floor slab enhances the structural strength of the floor slab 4. Furthermore, the lower fixing plate 3 also improves the stability of the U-shaped hook, reduces dynamic loads during operation, and enhances the overall structural strength.

[0095] like Figure 5 As shown, in order to improve the stability of the U-shaped hook, a diagonal brace 52 can also be set below the lower fixed plate 2. The diagonal brace 52 is fixedly connected to the lower fixed plate 2. Two groups of diagonal braces 52 are symmetrically arranged. The two groups of diagonal braces 52 are respectively located on both sides of the U-shaped hook to balance the radial force applied to the U-shaped hook, thereby improving the stability of the U-shaped hook.

[0096] Preferably, to further enhance the stability of the U-shaped hook, a fixing rod 51 is provided between the lower fixing plate 3 and the upper fixing plate 1. The ends of the fixing rod 51 are fixed to the lower fixing plate 3 and the upper fixing plate 1, respectively, and the middle is connected to the floor slab 4 by chemically anchored reinforcement. This structural approach can further enhance the load-bearing range of the U-shaped hook.

[0097] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0098] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0099] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A light steel hook under the original structural concrete floor, characterized in that: The invention comprises an upper fixing plate (1) and a U-shaped hook fixedly connected to the upper fixing plate (1), wherein the upper fixing plate (1) is located above the floor plate (4), the circular ring portion (21) of the U-shaped hook is located below the floor plate (4), and two end rods (22) of the U-shaped hook pass through the floor plate (4) and are fixedly connected to the upper fixing plate (1); The end of the end rod (22) is not higher than the upper surface of the upper fixing plate (1).

2. The light steel hook under the original structural concrete floor according to claim 1 is characterized in that: The upper fixing plate (1) is provided with two fixing holes (11), and the two end rods (22) of the U-shaped hook are fixedly connected to the two fixing holes (11) respectively.

3. The light steel hook under the original structural concrete floor according to claim 2 is characterized in that: The light steel hook under the original structural concrete floor also includes a lower fixing plate (3), the lower fixing plate (3) is provided with two fixing holes (11), and the two end rods (22) of the U-shaped hook are respectively fixedly connected to the two fixing holes (11).

4. A construction method for a light steel hook under an original structural concrete floor according to any one of claims 1 to 3, characterized in that: include: Step 1: Drill two anchor holes (41) at corresponding positions of the floor slab (4) according to the location of the lifting point; Step 2, fixing the end rod (22) of the U-shaped hook to the two anchor holes (41) of the floor slab (4) respectively by chemical anchoring; Step 3, placing the upper fixing plate (1) corresponding to the position of the anchor hole (41); Step 4: Fix the U-shaped hook and the upper fixing plate (1) by plug welding.

5. A construction method according to claim 4, characterized in that: In step 2, the chemical rebar planting process includes: 2.1 Clean the dust inside the anchor hole (41) to ensure that the anchor hole (41) is dry and free of debris; 2.2 Inject the rebar planting glue into the rebar planting hole (41), and push the U-shaped hook upward from the bottom of the rebar planting hole (41); 2.3 Let it stand and wait for the anchor glue to solidify.

6. The construction method according to claim 5, characterized in that: In 2.2, the lower end of the anchor hole (41) is first sealed with a flat plug, and then anchor glue is injected into the anchor hole (41).

7. The construction method according to claim 6, characterized in that: In 2.2, the two end rods (22) of the U-shaped hook are respectively provided with sleeves for shielding the ends of the U-shaped hook, and the bottoms of the sleeves are matched with the ends of the U-shaped hook.

8. The construction method according to claim 7, characterized in that: The height of the sleeve corresponds to the length of the through-hole plug weld of the end rod (22).

9. The construction method according to claim 5, characterized in that: In 2.2, first, the chemical rebar planting section of the U-shaped hook is smeared with rebar planting glue, then the U-shaped hook is passed upward from the bottom of the rebar planting hole (41), and finally the rebar planting glue is injected into the rebar planting hole (41).

10. The construction method according to claim 9, characterized in that: When applying the anchor glue, you need to reserve the length for the perforation plug welding.

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