Prefabricated hoisting structure for vertical component of assembly type factory building

Abstract

The utility model relates to the technical field of prefabricated part hoisting, and particularly discloses an assembly type factory building vertical part prefabricated hoisting structure which comprises a prefabricated part, a duckbilled hoisting tool, a hoisting nail and a steel hoisting chain, the duckbilled hoisting tool comprises a connecting part and a buckling part, two ring openings are formed in the connecting part, one ring opening is used for penetrating through the buckling part, and the other ring opening is used for penetrating through the buckling part. The other ring opening is used for being hooked with a steel sling chain; the top surface and the side wall of the prefabricated part are provided with a plurality of lifting points, the lifting points are uniformly distributed at the top corners of the prefabricated part, the lifting nails are respectively embedded at the top corners of the prefabricated part, and the lifting nails are embedded at the top corners of the prefabricated part. The width of the ring groove front section is gradually decreased along the length, and the width of the ring groove rear section is gradually decreased along the length. According to the scheme, the problems that the sizes of lifting points in an existing lifting structure are inconsistent, so that duckbilled lifting appliances cannot be mounted on some lifting points, the construction time is wasted, and the cost is increased can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of precast component hoisting, in particular to a precast hoisting structure for vertical components of an assembled factory building. Background Technique

[0002] The vertical component of an assembled factory building is a new type of precast concrete component. Through factory production, it can save materials and labor, improve construction efficiency, shorten the construction site period, improve the quality of construction projects, and reduce the emission of construction waste.

[0003] The vertical components of an assembled factory building have problems such as heavy self-weight and wide hoisting coverage. As described in the Chinese utility model with the publication number CN219860079U, the existing hoisting structure includes lifting nails embedded in the component and a duckbill sling used to clamp the lifting nails. After the lower end of the duckbill sling is clamped with the lifting nail, the steel sling chain is hooked to the upper end of the duckbill sling and is dispersedly fixed at different sling points through multiple strands of steel sling chains to complete the hoisting of the entire embedded component. The precast components are manufactured by specialized manufacturers. The precast manufacturer of the vertical components of the assembled factory building has made seven sling points on the component. Three sling points are arranged on the same side of the vertical component, and their function is to facilitate the loading and unloading of the vertical components of the assembled factory building; four sling points are arranged at the top of the vertical component and are symmetrically distributed at the four corners, and their function is to facilitate the hoisting of the vertical components of the assembled factory building. It is found during on-site hoisting that due to the inconsistent sizes of the sling points made by the precast vertical component manufacturer, some sling points cannot be installed with the duckbill sling. There is an annular groove on the side wall of the existing duckbill sling, and the width of the annular groove is two-stage. The width of the front section is used to penetrate the head of the "T"-shaped lifting nail, and the width of the rear section is used to lift and connect the head of the T-shaped lifting nail. Since the width of the front section of the existing duckbill sling always remains the same, when there is a deviation between the outer diameter of the head of the lifting nail and the opening width of the duckbill sling, when the staff penetrates the top of the lifting nail into the entrance of the duckbill sling, the lifting nail and the side wall of the duckbill sling are prone to impact and collision, and there is a blockage phenomenon when the lifting nail slides into the chute of the duckbill sling, resulting in some sling points being unable to install the duckbill sling, and the overall work efficiency is low. If the sling point position of the vertical component of the assembled factory building is chiseled in detail, this process is extremely time-consuming and increases the risk of damaging the vertical component of the assembled factory building to a certain extent, and generates additional repair costs. Therefore, our company proposes a new precast hoisting structure for vertical components of an assembled factory building. Content of the Utility Model

[0004] The utility model aims to provide a precast hoisting structure for vertical components of an assembled factory building to solve the problem that the inconsistent sizes of the sling points in the existing hoisting structure cause some sling points unable to install the duckbill sling, thus wasting construction time and increasing costs.

[0005] To solve the above problems, the technical solution adopted by the present utility model is as follows: A prefabricated hoisting structure for vertical components of an assembled factory building, comprising prefabricated components, duckbill lifting tools, lifting nails, and steel lifting chains. The duckbill lifting tool includes a connecting part and a buckling part. Two loop openings are formed on the connecting part. One loop opening is used to pass through the buckling part, and the other loop opening is used to hook with the steel lifting chain. A loop groove extending circumferentially along the circular ring part is formed on the side wall of the buckling part. The loop groove includes a front section and a rear section. It is characterized in that: The prefabricated component is in a long strip shape, and a plurality of lifting points are provided on the top surface and side wall of the prefabricated component. The lifting points are all distributed at the top corners of the prefabricated component. The lifting nails are respectively embedded at the top corners of the prefabricated component. The width of the front section of the loop groove gradually decreases along its length, and the width of the rear section of the loop groove gradually decreases along its length.

[0006] The basic principle of this solution is: Select the diagonal lifting points among multiple lifting points to install the duckbill lifting tool. Both the front section and the rear section of the loop groove of the duckbill lifting tool adopt a transitional structure, and a smooth transition can be achieved between the front section and the rear section. The large opening of the front section avoids direct collision between the lifting nail and the end face of the chute, and the transitional structure of the rear section ensures that the lifting nail is not blocked when entering the rear section, thereby reducing the risk of blockage and failure.

[0007] The beneficial effects of this solution are: In the existing duckbill lifting tool, the width of the front section always remains the same. When there is a deviation between the outer diameter of the head of the lifting nail and the opening width of the duckbill lifting tool, when the staff inserts the top of the lifting nail into the entrance of the duckbill lifting tool, the lifting nail is likely to collide with the side wall of the duckbill lifting tool, and there is a blockage phenomenon when the lifting nail slides into the chute of the duckbill lifting tool, resulting in some lifting points being unable to install the duckbill lifting tool, and the overall working efficiency is relatively low. This solution adjusts the loop groove structure of the duckbill lifting tool, sets the widths of the front section and the rear section of the loop groove to decrease, which facilitates the head of the lifting nail to slide into the loop groove without being blocked, thereby reducing the risk of blockage and failure. At the same time, it avoids the impact and damage of the end of the duckbill lifting tool after colliding with the lifting nail, and improves the installation efficiency.

[0008] Further, the steel lifting chain is connected to the lifting points that are diagonal and in the same plane. By reducing the number of lifting points, the hoisting efficiency is accelerated. A set of diagonal lifting points are used to hoist the vertical component and two lifting points are used for unloading the vehicle.

[0009] Further, the weight of the prefabricated component is 10 - 15t, the chain diameter of the steel lifting chain is 20 - 25mm, and the allowable load of the steel lifting chain is 8 - 10t. Since a set of diagonals are used to hoist the vertical components of the assembled factory building, during the process of the vertical components of the assembled factory building not being fully erected, only the lowermost steel lifting chain is stressed. Therefore, the strength of the steel lifting chain is selected according to needs.

[0010] Further, when unloading the precast component from the vehicle, the long side of the precast component is parallel to the ground, and the included angle between the precast component and the steel sling is greater than or equal to 30°. When hoisting diagonally, an obtuse triangle is formed between the two steel slings and the precast component, ensuring the safety of unloading the vehicle.

[0011] Further, the length of the steel sling is 4600 - 6000 mm. Taking the vertical component of a 14t prefabricated factory building as an example, its length is 8000 mm, and half of it is 4000 mm. Assuming the length of the steel sling is xmm and the included angle between the steel sling and the vertical component is 30°, according to the Pythagorean theorem, 2:x = √3:4, and by calculation, x is 4600. The research group determined to use a steel sling with a length of 6000 mm, which has a large adjustable range while ensuring safety.

[0012] Further, a layer of anti-rust paint is covered in the ring groove. To prevent the ring groove of the duckbill sling from accumulating water and rusting.

[0013] Further, a layer of anti-rust paint is sprayed on the lifting pin. Since the lifting pin is embedded under the surface of the precast component, in order to prevent the embedded lifting pin from rusting due to water accumulation in the lifting point, anti-rust paint is sprayed on the surface of the lifting pin. Description of the Drawings

[0014] Figure 1 Schematic diagram of loading and unloading the precast component 1 in the embodiment of the present invention;

[0015] Figure 2 Schematic diagram of vertically lifting the precast component 1 in the embodiment of the present invention;

[0016] Figure 3 Schematic diagram of the embodiment of the present invention;

[0017] Figure 4 Side view schematic diagram of the embodiment of the present invention when the lifting points are connected;

[0018] Figure 5 Schematic diagram of the embodiment of the present invention;

[0019] Figure 6 Schematic diagram of the ring groove in the embodiment of the present invention;

[0020] Figure 7 Schematic diagram of the ring groove of the duckbill sling in the prior art;

[0021] Figure 8 Schematic diagram when the precast component is vertically hoisted. Detailed Description of the Invention

[0022] The following is a further detailed description through specific embodiments:

[0023] The reference numerals in the drawings of the specification include: precast member 1, duckbill sling 2, hanging nail 3, steel sling chain 4, connecting part 5, loop opening 51, buckling part 6, annular groove 7, front section 71, rear section 72, and hanging point 8.

[0024] The embodiment is basically as shown in the appended Figure 1 to the appended Figure 8 figures:

[0025] A prefabricated hoisting structure for vertical members of an assembled factory building includes a precast member, a duckbill sling 2, a hanging nail 3, and a steel sling chain 4. In this embodiment, the precast member is a long strip quadrangular prism type and is vertical to the ground in the assembled state. The number of hanging points 8 of the precast member is 7, four of which are at the four top corners of the top surface of the precast member, and the remaining three are located on the same side of the precast member, and two of them are arranged diagonally, and the remaining one is arranged in the middle of the side. Hanging nails 3 are buried in the precast member at the hanging points 8 respectively. The hanging nails 3 are in the shape of "I". Hemispherical openings are formed on the precast member around the hanging nails 3 for the buckling part 6 of the duckbill sling 2 to extend into and rotate. The top surface height of the hanging nail 3 is lower than the top surface height of the surrounding precast member.

[0026] The duckbill sling 2 in this embodiment includes a connecting part 5 and a buckling part 6. The duckbill sling 2 is integrally cast from alloy steel. The connecting part 5 is a metal block in the shape of "8". There are two loop openings 51 on the connecting part 5. One of the loop openings 51 is used to hook with the steel sling chain 4, and the other loop opening 51 is used to pass through the buckling part 6. The edge of the loop opening 51 is polished into a circumferential surface, which enables the buckling part 6 to rotate freely on the loop edge. The connecting part 5 is the same as the conventional duckbill buckle sling and is prior art. The buckling part 6 is disc-shaped. The central axis of the buckling part 6 passes through the connecting part 5. An annular groove 7 is formed on the circumferential outer wall of the buckling part 6. The annular groove 7 is a two-section incomplete ring, including a front section 71 and a rear section 72. The width of the front section 71 of the annular groove 7 is greater than the width of the rear section 72. The width of the front section 71 gradually decreases along the direction close to the rear section 72, and the width of the rear section 72 gradually decreases along the direction away from the front section 71. An anti-rust material is sprayed in the annular groove 7. The difference between this embodiment and the conventional duckbill sling 2 is that the widths of the front section 71 and the rear section 72 do not remain fixed. In this embodiment, the widths of the front section 71 and the rear section 72 extend from wide to narrow respectively. When the staff inserts the hanging nail 3 into the annular groove 7, it can avoid the narrow entrance causing the hanging nail 3 to collide with the side wall of the annular groove 7, reduce the possibility of the hanging nail 3 directly impacting and colliding with the annular groove 7, and reduce the jamming and bumping caused by size mismatch or direction deviation during the sliding process, which helps to maintain the smooth movement of the slider.

[0027] In addition, in this embodiment, in order to reduce the lifting points 8 of the vertically lifted components and ensure the stability of the lifting process at all times, when lifting the vertically lifted components, the steel sling 4 is connected to the diagonal lifting points 8 on the same plane, and each lifting point 8 uses one strand of steel sling 4 respectively. In this embodiment, the weight of the precast component is 14.22t, the length is 8000mm, the chain diameter of the steel sling 4 is 20mm, the allowable load of the steel sling 4 is 8t, the precast component is in a horizontal state when loading and unloading the vehicle, and the precast component is in a vertical state when assembling at the installation site. Therefore, in this solution, different lifting points 8 on different surfaces of the precast component are used in the two states respectively. When loading and unloading the vehicle, the duckbill sling 2 is docked with the lifting nails 3 on the side wall of the precast component respectively. As Figure 1 shown, the number of steel slings 4 is two, and the angle between the steel sling 4 and the precast component is not less than 30°. In this embodiment, according to the Pythagorean theorem, the length of the steel sling 4 used for the vertically lifted components of the 14.22t prefabricated factory building is calculated. The length of the component is 8000mm, and half of it is 4000mm. Assuming the length of the steel sling 4 is xmm and the angle between the steel sling 4 and the vertical component is 30°, the following equation can be obtained according to the Pythagorean theorem: 2:x = √3:4. After calculation, x is 4600. Therefore, the steel sling 4 with a length of 4600 - 6000mm can be used, and 6000mm is preferably selected in this embodiment.

[0028] When vertically assembling the component, as Figure 2 and Figure 7 shown, during the process of the vertical component not being fully erected, only the lowest steel sling 4 with a lower height is stressed. According to the selection table of T8 grade lifting chains, the steel sling 4 for lifting the vertically lifted components of the 14.22t prefabricated factory building is selected with a chain diameter d of 20mm and an allowable load of 8t.

[0029] The specific implementation process is as follows:

[0030] When loading and unloading the vehicle, install the steel sling 4 on the hook of the crane, hook the lower end of the steel sling 4 to two duckbill slings 2, select two diagonal lifting points 8 on one side wall of the precast component horizontally placed on the ground, and dock the duckbill sling 2 with the lifting nail 3. When docking, the buckling part 6 rotates along the ring edge of the connecting part 5, so that the ring groove 7 rotates relative to the lifting nail 3. The lifting nail 3 first passes through the front section 71 of the ring groove 7. The gradually widening opening of the front section 71 of the ring groove 7 can prevent the lifting nail 3 from colliding with the side wall of the ring groove 7, and can enable the lifting nail 3 to smoothly enter the rear section 72 of the ring groove 7. When the lifting nail 3 slides in the rear section 72, it can also smoothly slide to the tail of the rear section 72. After the duckbill sling 2 and the lifting nail 3 are installed, the crane lifts upward.

[0031] When the prefabricated component is lifted vertically, the steel lifting chain 4 is still installed in the above scheme. The difference lies in that the lifting point 8 used is different. The lifting point 8 is selected as the diagonal lifting point 8 on the top surface of the prefabricated component. After the duckbill sling 2 is buckled with the lifting nail 3 at the lifting point 8, the crane is started to lift the prefabricated component upward, and it pauses about 600mm above the final installation point. The construction personnel can hold the column by hand to control the falling direction. When it is 20mm away from the top of the pre-embedded steel bars on the ground, it is aligned with the control line on the ground. After the position of the bottom sleeve is aligned with the position of the pre-embedded steel bars on the ground, the component column is slowly lowered to make it stable in place.

[0032] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A prefabricated hoisting structure for vertical components of an assembled factory building, comprising prefabricated components, a duckbill sling, lifting nails, and a steel sling chain. The duckbill sling includes a connecting part and a buckling part. Two loop openings are formed in the connecting part. One loop opening is used for passing through the buckling part, and the other loop opening is used for hooking with the steel sling chain. A ring groove extending circumferentially along the circular ring part is formed in the side wall of the buckling part. The ring groove includes a front section and a rear section, and is characterized in that: The precast component is strip-shaped, and a number of lifting points are provided on the top surface and side walls of the precast component. The lifting points are all distributed at the apex angles of the precast component. The lifting nails are respectively embedded at the apex angles of the precast component. The width of the front section of the annular groove gradually decreases along its length, and the width of the rear section of the annular groove gradually decreases along its length.

2. The prefabricated hoisting structure for vertical components of an assembled factory building according to claim 1, wherein: The steel lifting chain is connected to the lifting points that are diagonal and in the same plane.

3. The prefabricated hoisting structure for vertical components of an assembled factory building according to claim 2, characterized in that: The weight of the precast component is 10 - 15t, the chain diameter of the steel lifting chain is 20 - 25mm, and the allowable load of the steel lifting chain is 8 - 10t.

4. The prefabricated hoisting structure for vertical components of an assembled factory building according to claim 3, characterized in that: When unloading the precast component from the vehicle, the long side of the precast component is parallel to the ground, and the angle between the precast component and the steel lifting chain is greater than or equal to 30°.

5. The prefabricated hoisting structure for vertical components of an assembled factory building according to claim 4, characterized in that: The length of the steel lifting chain is 4600 - 6000mm.

6. The prefabricated hoisting structure for vertical components of an assembled factory building according to claim 5, characterized in that: A layer of anti-rust paint is covered in the annular groove.

7. A prefabricated hoisting structure for vertical components of an assembled factory building according to claim 6, characterized in that: A layer of anti-rust paint is sprayed on the lifting nail.

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