Mechanical connection type precast concrete component hoisting structure

Abstract

The utility model discloses a mechanical connection type precast concrete component hoisting structure, which comprises a pre-embedded steel sleeve, a sleeve end part adapter and an anti-pulling additional part, the outer wall of the pre-embedded steel sleeve is provided with a bond reinforcing rib, the top end part of the pre-embedded steel sleeve is provided with a hollow mantle fiber to form an internal thread, and the sleeve end part adapter comprises a flexible lifting appliance or a protective cap. A bottom end part mantle fiber of the sleeve end part adapter is matched with the internal thread, a transverse through hole is formed in the bottom end part of the embedded steel sleeve, and a bond reinforcing rib is arranged on the outer wall of the anti-pulling additional part and penetrates into the transverse through hole. According to the utility model, the use of steel bars is reduced, and steel is saved; after the bonding force is improved, the embedded steel sleeve and the anti-pulling piece do not need to be connected with a stress rib of the concrete member, construction is easy, the replaceable sleeve end adapter is adopted for achieving the hoisting and plugging functions, construction is easy, the appearance is attractive, the embedded steel sleeve and the anti-pulling piece can be recycled in the hoisting process, and turnover is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of assembly type prefabricated component hoisting, especially a mechanical connection type concrete prefabricated component hoisting structure. BACKGROUND

[0002] The assembly type building has the advantages of design standardization, production factoryization, management informationization, application intelligentization and the like, and has been widely applied to various aspects of the building industry. When the assembly type building is installed, a lifting ring is usually pre-buried before concrete prefabricated components are poured, and after reaching the specified strength, the components are transported and the lifting ring is used by a crane for on-site hoisting. Considering the damage to the sling and the hook, the lifting ring usually adopts a smooth round steel bar, which first reduces the friction between the round steel surface and the sling, and second, in order to ensure the stress safety of the smooth round steel lifting ring during hoisting, an anti-pulling piece needs to be attached to the bottom of the lifting ring. The anti-pulling piece generally has two setting modes. One is an anti-pulling steel bar. Since the round steel has good ductility and low carbon content, it is easy to bend and not easy to break. The bottom of the lifting ring is directly bent outward, forming an Ω shape as a whole. The length of the bent part needs to be at least the same as the length of the lifting ring, which is very wasteful of steel bars. At the same time, the bent part needs to be connected with the stress bars of the prefabricated component concrete during prefabrication, which is very cumbersome to construct. The other is an anti-pulling steel plate, which is sleeved with a wire at the bottom of the round steel and is screw-connected with a rectangular steel plate with a hole, which is more wasteful of materials.

[0003] In large-scale prefabricated component production, this round steel lifting ring process will cause a large amount of loss of structural steel bars and steel plates. For prefabricated component lifting rings that need to be retained for a long time, a steel plate needs to be added on top to cover them, which not only affects the appearance of the building, but also requires a large amount of labor for subsequent processing. For prefabricated road surface components, the protruding lifting ring will also affect the use of the road surface. If it does not need to be hoisted again, the lifting ring needs to be removed and the surface needs to be further treated, which is very cumbersome to construct. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a mechanical connection type concrete prefabricated component hoisting structure, which solves the technical problems of waste of a large amount of materials and cumbersome construction caused by the use of smooth round steel bars and anti-pulling pieces in the pre-buried lifting ring of existing concrete prefabricated components. It also solves the technical problem of the need for a steel plate to cover the protruding lifting ring for long-term retention, which requires a large amount of labor for use and processing. It also solves the technical problem of the need for cutting and surface treatment of the non-retained lifting ring, which is very cumbersome to construct.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A mechanical connection type concrete prefabricated component hoisting structure, comprising a pre-buried device, the pre-buried device comprising a pre-buried steel sleeve, a sleeve end adapter and an anti-pulling additional piece,

[0007] The embedded steel sleeve is vertically arranged, the outer wall of the embedded steel sleeve is provided with a gripping reinforcing rib, the top end of the embedded steel sleeve is hollow and is provided with an internal thread, the sleeve end fitting comprises a flexible lifting appliance or a protective cap, the bottom end of the sleeve end fitting is provided with an external thread matched with the internal thread, the sleeve end fitting is connected with the embedded steel sleeve through the threads,

[0008] The bottom end of the embedded steel sleeve is provided with a transverse through hole, the transverse through hole is perpendicular to the longitudinal axis of the embedded steel sleeve, the outer wall of the anti-pulling additional part is provided with a gripping reinforcing rib, the anti-pulling additional part penetrates into the transverse through hole and is located in the transverse through hole, and the anti-pulling additional part and the embedded steel sleeve form an inverted T-shaped anti-pulling assembly.

[0009] The gripping reinforcing rib is arranged along the outer wall surface of the embedded steel sleeve, and the gripping reinforcing rib is in the shape of a continuously arranged spiral rib, a herringbone rib arranged in a row and spaced apart or a crescent rib arranged in a row and spaced apart.

[0010] The embedded steel sleeve is formed by drilling and threading the top of a ribbed steel bar, and the anti-pulling additional part is a ribbed steel bar, and the outer wall of the ribbed steel bar is provided with an anti-pulling reinforcing rib.

[0011] The flexible lifting appliance comprises a steel wire rope lifting ring and an aluminum alloy crimping sleeve, the bottom of the steel wire rope lifting ring is fixedly connected with the top of the aluminum alloy crimping sleeve, and the bottom end of the aluminum alloy crimping sleeve is externally threaded to form an external thread.

[0012] The protective cap is integrally made of plastic.

[0013] The protective cap comprises a threaded stud, a limiting cover plate and a closing cover plate, the outer side of the threaded stud is externally threaded to form an external thread, and the length of the threaded stud is smaller than the depth at which the internal thread is arranged at the top end of the embedded steel sleeve; the bottom surface of the limiting cover plate is centrally connected with the top surface of the threaded stud, the diameter of the limiting cover plate is greater than the diameter of the embedded steel sleeve, and the bottom surface of the closing cover plate is centrally connected with the top surface of the limiting cover plate, and the diameter of the closing cover plate is greater than the diameter of the limiting cover plate.

[0014] The precast component of concrete is further provided, an operation groove is arranged at the surface layer of the precast component and at the position where the embedded device is arranged, the embedded device comprises an operation part and an embedded part, the operation part is exposed at the position of the operation groove, and the rest part is the embedded part embedded in the concrete.

[0015] The operation part comprises the top end of the embedded steel sleeve, the height of the operation part is greater than the arrangement depth of the internal thread, and the top surface of the operation part is lower than the top surface of the precast component.

[0016] The gripping reinforcing rib of the embedded part is separately bonded with the concrete of the precast component.

[0017] The diameter of the closing cover plate is adapted to the diameter of the operation groove.

[0018] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0019] The pre-embedded device is made of a pre-embedded steel sleeve and a pulling-out resistant piece made of ribbed threaded steel, the outer wall of the pre-embedded steel sleeve is provided with a wrapping reinforcing rib, the strength is high and the adhesion between the steel sleeve and the concrete member is enhanced, and the pulling-out resistant additional piece can also be made of ribbed steel, so that the adhesion is further improved.

[0020] The utility model discloses two sleeve end adapters, which are all in threaded connection with the pre-embedded steel sleeve, wherein the flexible lifting appliance is made of a steel wire rope lifting ring and an aluminum alloy crimping sleeve, the steel wire rope lifting ring replaces round steel and is more flexible, and the rope appliance can better reduce the friction between the lifting appliance and the lifting hook. Since the steel wire rope lifting ring does not protrude from the prefabricated member like the reinforcing steel, the prefabricated member lifting ring that needs to be retained for a long time does not need to be covered by a steel plate from above, if the prefabricated member does not need to be lifted again, the flexible lifting appliance can be rotated out after the lifting of the prefabricated member is completed, and then a plastic protective cap is screwed into the pre-embedded steel sleeve, so that a large amount of cutting work and post-decoration treatment are not needed, the operation groove of the prefabricated member that is reserved to expose the pre-embedded device can be sealed, the surface of the prefabricated member is ensured to be flush, and foreign matters are prevented from entering the pre-embedded steel sleeve and being blocked, the construction is simple, the appearance is beautiful, and the normal use of the member is not affected.

[0021] The sleeve end adapters in the utility model can be recycled in lifting, and turnover is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further explained in detail in combination with the drawings.

[0023] Figure 1 is a side view of the pre-embedded device of the utility model embedded in a prefabricated member.

[0024] Figure 2 is a three-dimensional split schematic view of the pre-embedded device of the utility model on which the flexible lifting appliance is installed.

[0025] Figure 3 is Figure 2 is a schematic view of the flexible lifting appliance in the utility model after being assembled and connected with a lifting hook.

[0026] Figure 4 is a three-dimensional split schematic view of the pre-embedded device of the utility model on which the protective cap is installed.

[0027] Figure 5 is Figure 4 is a three-dimensional schematic view of the protective cap in the utility model after being assembled.

[0028] Figure 6 is Figure 4 is a bottom view of the utility model.

[0029] Figure 7 is Figure 6 is a perspective view of the assembled protective cap.

[0030] Figure 8 is a structural schematic diagram of step one in use.

[0031] Figure 9 is a structural schematic diagram of step two in use.

[0032] Figure 10 is a structural schematic diagram of step four in use.

[0033] Reference signs: 1 - embedded device, 11 - operating part, 12 - embedded part, 2 - embedded steel sleeve, 21 - gripping reinforcing rib, 22 - internal thread, 23 - transverse through hole, 3 - anti-pulling additional part, 31 - anti-pulling reinforcing rib, 4 - flexible lifting device, 41 - steel wire lifting ring, 42 - aluminum alloy crimping sleeve, 5 - protective cap, 51 - stud, 52 - limiting cover plate, 53 - closing cover plate, 6 - external thread, 7 - prefabricated component, 71 - operating groove, 8 - lifting hook. DETAILED DESCRIPTION

[0034] The embodiment is described with reference to Figures 1-7 , a mechanical connection type concrete prefabricated component lifting structure, which comprises an embedded device 1, the embedded device 1 comprising an embedded steel sleeve 2, a sleeve end part adapter and an anti-pulling additional part 3.

[0035] The embedded steel sleeve 2 is vertically arranged, and the outer wall thereof is provided with a gripping reinforcing rib 21. The gripping reinforcing rib 21 is arranged along the outer wall surface of the embedded steel sleeve 2 in a length direction, and the shape of the gripping reinforcing rib 21 is a continuously arranged spiral rib, a columnar and interval arranged herringbone rib or a columnar and interval arranged crescent rib.

[0036] The bottom end part of the embedded steel sleeve 2 is provided with a transverse through hole 23, the transverse through hole 23 being perpendicular to the longitudinal axis of the embedded steel sleeve 2, the outer wall of the anti-pulling additional part 3 is provided with a gripping reinforcing rib 21, the anti-pulling additional part 3 is penetrated into the transverse through hole 23 and the middle part thereof is located in the transverse through hole 23, and the anti-pulling additional part 3 and the embedded steel sleeve 2 form an inverted T-shaped anti-pulling assembly. In this embodiment, the anti-pulling additional part 3 is a ribbed steel bar, and the outer wall thereof is provided with an anti-pulling reinforcing rib 31.

[0037] The top end part of the embedded steel sleeve 2 is hollow and threaded to form an internal thread 22, the sleeve end part adapter comprises a flexible lifting device 4 or a protective cap 5, the bottom end part of the sleeve end part adapter is threaded to form an external thread 6 matched with the internal thread 22, and the sleeve end part adapter is connected with the embedded steel sleeve 2 through thread connection. In this embodiment, the embedded steel sleeve 2 is a ribbed steel bar, and the top part thereof is drilled and threaded.

[0038] Reference is made to Figures 1-3 , Figure 9As shown, when the sleeve end adapter is the flexible sling 4, the flexible sling 4 comprises a wire sling ring 41 and an aluminum alloy crimp sleeve 42, the bottom of the wire sling ring 41 is fixedly connected with the top of the aluminum alloy crimp sleeve 42, and the outer side of the bottom end of the aluminum alloy crimp sleeve 42 is sleeved with a wire to form the external thread 6.

[0039] As shown in the figure, Figures 4-7 , Figure 10 As shown, when the sleeve end adapter is the protective cap 5, in the embodiment, the protective cap 5 is integrally made of plastic, and PVC can be used in actual use, and the protective cap 5 comprises a stud 51, a limiting cover plate 52 and a closing cover plate 53, the outer side of the stud 51 is sleeved with a wire to form the external thread 6, and the length of the stud 51 is less than the depth of the internal thread 22 arranged at the top end of the embedded steel sleeve 2; the bottom surface of the limiting cover plate 52 is connected with the center of the top surface of the stud 51 in alignment, the diameter of the limiting cover plate 52 is greater than the diameter of the embedded steel sleeve 2, and the bottom surface of the closing cover plate 53 is connected with the center of the top surface of the limiting cover plate 52 in alignment, and the diameter of the closing cover plate 53 is greater than the diameter of the limiting cover plate 52.

[0040] As shown in the figure, Figure 1 , Figures 8-10 As shown, the mechanical connection type concrete precast component lifting structure is embedded in the precast component 7 in advance, and therefore the structure further comprises the precast component 7 of concrete. An operating groove 71 is formed in the surface layer of the precast component at the position where the embedded device 1 is arranged, and the diameter of the closing cover plate 53 is adapted to the diameter of the operating groove 71. The embedded device 1 comprises an operating part 11 and an embedded part 12, the operating part 11 is exposed at the position of the operating groove 71, and the rest part is the embedded part 12 embedded in the concrete. The operating part 11 comprises the top end of the embedded steel sleeve 2, the height of the operating part 11 is greater than the arrangement depth of the internal thread 22, and the top surface of the operating part 11 is lower than the top surface of the precast component 7.

[0041] The gripping reinforcing rib 21 and the anti-pulling reinforcing rib 31 of the embedded part 12 are separately bonded to the concrete of the precast component 7 to bear force, and it is not necessary to arrange more anti-pulling members, the amount of steel bars used is reduced, and it is not necessary to bind or weld the steel bars in the precast component, and the construction is simple.

[0042] In the embodiment, the embedded steel sleeve 2 is a high-strength threaded steel bar with a diameter of 25-30 mm and a length of 150-200 mm, the anti-pulling additional member 3 is a threaded steel bar with a diameter of 15-22 mm, and the wire sling ring 41 is a steel wire with a diameter of 20-25 mm.

[0043] The construction and use process of the utility model are as follows:

[0044] Step one, refer to Figure 8As shown, when prefabricating the concrete prefabricated part 7, the embedded device 1 is assembled, the anti-pulling accessory 3 is passed through the bottom of the embedded steel sleeve 2, then the embedded device 1 is fixed in the outer formwork of the prefabricated part 7, while the inner formwork is installed on the top of the embedded device 1, then the concrete is poured, and when the strength is reached, the outer formwork and the inner formwork are removed, forming the prefabricated part 7 and the operation slot 71;

[0045] Step two, see Figure 9 As shown, the prefabricated part 7 is transported to the construction site, the flexible lifting appliance 4 is screwed with the embedded steel sleeve 2, then the lifting hook 8 is hung with the wire rope lifting ring 41, and the hoisting work of the prefabricated part 7 is carried out;

[0046] Step three, for the lifting ring that needs to be retained for a long time, the status quo is maintained;

[0047] Step four, see Figure 10 As shown, if there is no need for hoisting again, the flexible lifting appliance 4 can be unscrewed after the hoisting is completed, and then the protective cap 5 is screwed into the embedded steel sleeve, at this time the operation slot 71 of the prefabricated part 7 can be blocked;

[0048] Step five, collect each sleeve end fitting and circulate to the next construction site.

Claims

1. A mechanical connection type concrete precast member hoisting structure, characterized by: The embedded device (1) comprises an embedded steel sleeve (2), a sleeve end adapter and a anti-pulling additional part (3), The embedded steel sleeve (2) is vertically arranged, and the outer wall thereof is provided with a gripping reinforcing rib (21). The top end of the embedded steel sleeve (2) is hollow and is provided with an internal thread (22). The sleeve end adapter comprises a flexible sling (4) or a protective cap (5). The bottom end of the sleeve end adapter is provided with an external thread (6) which is matched with the internal thread (22). The sleeve end adapter is connected with the embedded steel sleeve (2) through the threads. The bottom end of the embedded steel sleeve (2) is provided with a transverse through hole (23) which is perpendicular to the longitudinal axis of the embedded steel sleeve (2). The outer wall of the anti-pulling additional part (3) is provided with a gripping reinforcing rib (21). The anti-pulling additional part (3) penetrates into the transverse through hole (23) and is located in the middle of the transverse through hole (23). The anti-pulling additional part (3) and the embedded steel sleeve (2) form an inverted T-shaped anti-pulling assembly.

2. The mechanical connection type concrete precast member hoisting structure according to claim 1, characterized by: The gripping reinforcing rib (21) is longitudinally arranged along the outer wall surface of the embedded steel sleeve (2). The gripping reinforcing rib (21) has a shape of a continuously arranged spiral rib, a columnar and interval arranged herringbone rib or a columnar and interval arranged crescent rib.

3. The mechanical connection type concrete precast member hoisting structure according to claim 1 or 2, characterized by: The embedded steel sleeve (2) is a ribbed steel bar. The top of the embedded steel sleeve (2) is drilled and threaded. The anti-pulling additional part (3) is a ribbed steel bar. The outer wall of the anti-pulling additional part (3) is provided with an anti-pulling reinforcing rib (31).

4. The mechanical connection type concrete precast member hoisting structure according to claim 1, characterized by: The flexible sling (4) comprises a wire rope sling ring (41) and an aluminum alloy crimping sleeve (42). The bottom of the wire rope sling ring (41) is fixedly connected with the top of the aluminum alloy crimping sleeve (42). The bottom end of the aluminum alloy crimping sleeve (42) is externally threaded to form an external thread (6).

5. The mechanical connection type concrete precast member hoisting structure according to claim 1, characterized by: The protective cap (5) is integrally made of PVC.

6. The mechanical connection type concrete precast member hoisting structure according to claim 1 or 5, characterized by: The protective cap (5) comprises a threaded stud (51), a limiting cover plate (52) and a closing cover plate (53). The outer side of the threaded stud (51) is externally threaded to form an external thread (6). The length of the threaded stud (51) is less than the depth of the embedded steel sleeve (2) in which the internal thread (22) is arranged at the top end. The bottom surface of the limiting cover plate (52) is centrally connected with the top surface of the threaded stud (51). The diameter of the limiting cover plate (52) is greater than the diameter of the embedded steel sleeve (2). The bottom surface of the closing cover plate (53) is centrally connected with the top surface of the limiting cover plate (52). The diameter of the closing cover plate (53) is greater than the diameter of the limiting cover plate (52).

7. The mechanical connection type concrete precast member hoisting structure according to claim 6, characterized by: The precast component (7) of concrete is further provided. An operating groove (71) is arranged on the surface of the precast component at the position where the embedded device (1) is arranged. The embedded device (1) comprises an operating part (11) and an embedded part (12). The operating part (11) is exposed at the position of the operating groove (71). The remaining part is the embedded part (12) which is embedded in the concrete.

8. The mechanical connection type concrete precast member hoisting structure according to claim 7, characterized by: The top end of the embedded steel sleeve (2) is the operating part (11). The height of the operating part (11) is greater than the arrangement depth of the internal thread (22). The top surface of the operating part (11) is lower than the top surface of the precast component (7).

9. The mechanical connection type concrete precast member hoisting structure according to claim 7, characterized by: The gripping reinforcing rib (21) of the embedded part (12) and the concrete of the precast component (7) are separately bonded and stressed.

10. The mechanical connection type concrete precast member hoisting structure according to claim 7, characterized by: The diameter of the closing cover plate (53) is adapted to the diameter of the operating groove (71).

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