Embedded hoisting device and precast concrete member

Abstract

The utility model relates to an embedded hoisting device and a precast concrete member, the embedded hoisting device comprises a steel wire rope, two connecting sleeves and two anchoring parts, and the two ends of the steel wire rope are connected with one ends of the two connecting sleeves in an extrusion mode respectively; one ends of the two anchoring parts are in extrusion connection, threaded connection or welding with the other ends of the two connecting sleeves respectively; the anchoring part is a steel bar or a steel bar. The embedded hoisting device composed of the steel wire rope, the connecting sleeve and the anchoring part is used, so that the bearing capacity of a hoisting piece is improved, a special hoisting tool is not needed, an exposed part does not need to be cut off, and meanwhile, the embedded hoisting device can be suitable for a thin precast concrete member.

Description

Technical Field

[0001] The utility model relates to a pre-buried hoisting device and a prefabricated concrete component, belonging to the technical field of assembled building manufacturing. Background Art

[0002] Currently, precast concrete components are increasingly being used in construction projects. These components, such as precast concrete beams, precast concrete wall panels, and precast concrete columns, are first produced in a precast plant and then transported to the construction site for installation. This process involves multiple steps involving the lifting of precast concrete components. For example, after production at the precast plant, the precast concrete components are placed on trucks; after the trucks arrive at the construction site, the precast concrete components are unloaded into the on-site warehouse; and during the installation phase, the precast concrete components are hoisted to the designated location in the building for installation.

[0003] Common embedded lifting devices generally include steel bar lifting rings, lifting rods, embedded sleeves and wire rope slings.

[0004] Rebar lifting rings are the most commonly used device for lifting precast concrete components. However, after the precast concrete components are installed, the exposed steel bars must be cut off, otherwise it will affect the installation of the upper and lower precast concrete components. The cutting process will increase the project personnel and equipment investment.

[0005] When using a suspender, although it is easy to disassemble, to ensure that the suspender head is flush with the concrete surface and does not affect the subsequent assembly of the upper and lower concrete components, in addition to the suspender itself, a formwork stripper and a special sling must be used in conjunction with it. Furthermore, the suspender is suitable for precast concrete components with a minimum thickness of 60mm. Similar to the suspender, the embedded sleeve must also be used with a plastic protective cover and a special sling, which increases project procurement costs. Furthermore, the thickness of the precast concrete components it is suitable for is at least 80mm. Furthermore, the embedded sleeve and suspender require a large installation space during installation and removal, and these suspenders have a low load-bearing capacity. For example, when the wall panel is 60mm or 80mm thick, the suspender and embedded sleeve have a load-bearing capacity of only 1.3 tons, which does not meet the requirements of thin and heavy precast concrete components.

[0006] Wire rope slings do not require special lifting equipment when used. Although the exposed portion of the sling is not flush with the plane of the precast concrete component, it is soft and does not necessarily need to be cut off. However, for precast concrete components with a thickness of 50mm, its load-bearing capacity is relatively low, only 0.8 tons. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a pre-buried lifting device and a precast concrete component in view of the deficiencies in the prior art. By using the pre-buried lifting device composed of a steel wire rope, a connecting sleeve and an anchoring part, the load-bearing capacity of the lifting part is improved, and no special lifting equipment is required, and no exposed part needs to be cut off. At the same time, the utility model is suitable for thin precast concrete components.

[0008] The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0009] The utility model provides a pre-embedded lifting device, which includes a steel wire rope, two connecting sleeves and two anchoring parts. The two ends of the steel wire rope are respectively extruded and connected with one end of the two connecting sleeves, and one end of the two anchoring parts is respectively extruded, threaded or welded with the other end of the two connecting sleeves; the anchoring parts are steel bars or steel bars.

[0010] One end of the steel wire rope connected to the connecting sleeve is located in the precast concrete component, and the two connecting sleeves and the two anchoring parts are all located in the precast concrete component.

[0011] The pre-embedded hoisting device further includes a spacing control portion for controlling the distance between two steel bars.

[0012] The anchoring portion is in a straight line shape, and the spacing control portion is two binding straps.

[0013] The anchoring portion includes a first anchoring segment and a second anchoring segment, the angle α between the first anchoring segment and the second anchoring segment is 0°<α<180°, and the spacing control portion is two binding straps.

[0014] The spacing control part is a steel bar or a steel rod, and both ends of the spacing control part are fixedly connected to one end of the two anchoring parts away from the connecting sleeve respectively, and the anchoring part and the spacing control part are U-shaped.

[0015] The spacing control part is a steel bar or a steel rod, the length of the spacing control part is greater than the distance between the ends of the two anchoring parts away from the connecting sleeve, and the spacing control part is fixedly connected to the ends of the two anchoring parts away from the connecting sleeve.

[0016] The anchoring portion is at least partially wavy, and the spacing control portion is two binding straps.

[0017] The anchoring portion is arranged vertically or inclined.

[0018] The two anchoring portions are parallel to each other or not parallel to each other.

[0019] The utility model also provides a precast concrete component, in which the precast concrete component is provided with the above-mentioned embedded hoisting device.

[0020] In summary, the utility model improves the load-bearing capacity of the lifting parts by using a pre-buried lifting device composed of a steel wire rope, a connecting sleeve and an anchoring part, and does not require special lifting equipment or cutting off the exposed part. At the same time, it is suitable for thin precast concrete components.

[0021] The technical solution of the present utility model is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a cross-sectional view of a precast concrete component including a pre-embedded lifting device in Example 1 of the present utility model;

[0023] Figure 2 This is a structural diagram of the pre-buried hoisting device of Example 1;

[0024] Figure 3 This is a structural diagram of the pre-buried hoisting device of Example 2;

[0025] Figure 4 This is a schematic structural diagram of the pre-buried hoisting device of Example 3;

[0026] Figure 5 This is a schematic structural diagram of the pre-buried hoisting device of Example 4;

[0027] Figure 6 This is a structural diagram of the pre-buried hoisting device of Example 5;

[0028] Figure 7 This is a structural diagram of the embedded lifting device of modification example 1. DETAILED DESCRIPTION

[0029] The present invention provides a pre-embedded hoisting device for hoisting precast concrete components, etc. The precast concrete components may be, for example, precast concrete beams, precast concrete wall panels, precast concrete columns, etc. The present invention is described using precast concrete wall panels as an example.

[0030] The embedded lifting device includes a steel wire rope, two connecting sleeves and two anchoring parts. The two ends of the steel wire rope are respectively extruded and connected to one end of the two connecting sleeves, and one end of the two anchoring parts is respectively extruded, threaded or welded to the other end of the two connecting sleeves.

[0031] The steel wire rope is roughly U-shaped, and one end thereof connected to the connecting sleeve is located in the precast concrete component. The two connecting sleeves and the two anchoring parts are all located in the precast concrete component.

[0032] Preferably, the diameter of the steel wire rope is 6 mm to 32 mm, and the strength level complies with the national standard GB / T20118, for example.

[0033] The anchoring portion can be a steel bar or a steel rod. The characteristics and advantages of steel bar or steel rod anchoring are that generally, as long as the thickness of the precast concrete component can ensure the steel bar protection layer, it can be used. For example, if the steel bar diameter is 10mm, the applicable precast concrete component thickness is 30mm.

[0034] The connecting sleeve may use a sleeve for mechanical connection of steel bars in the prior art. For example, the design and selection of the connecting sleeve may refer to the standard JG / T 163-2013.

[0035] Compared to wire ropes, the anchoring strength of rebar or steel rods in concrete depends on the concrete strength, the steel strength, and the anchorage depth (i.e., the length of bond to the concrete). When the embedment depth is sufficient, the bearing capacity depends solely on the steel strength: higher strength yields greater bearing capacity. In other words, using higher-grade rebar or increasing the anchorage depth can significantly increase the bearing capacity. Rebar or steel rods, for example, comply with national standards GB / T 1499.1 and GB / T 1499.2.

[0036] When steel bars or rods are used as anchoring parts, they can be applied to thin and large precast concrete components, such as precast concrete wall panels, whose panel thickness only needs to be 3 times the diameter of the steel bar to fully exert the strength of the steel bar to achieve high bearing capacity.

[0037] Lifting devices such as hangers and embedded sleeves have relatively high requirements for the thickness of precast concrete components. For example, the hanger's anchor into the concrete is a large-headed anchor. When the hanger transmits load, stress concentration easily occurs at the edge of the anchor head, resulting in greater stress on the concrete at this location and prone to concrete spalling and damage on both sides of the wall panel. To avoid these problems, lifting devices such as hangers and embedded sleeves are only suitable for thicker precast concrete components. In addition, to increase the load-bearing capacity, additional reinforcement is required, which adds additional costs.

[0038] The utility model utilizes the bonding force between the steel bar and the concrete itself, eliminates the large-head anchor nails and the like, utilizes the connecting sleeve to respectively connect the steel wire rope and the anchoring part, and completely avoids the risk of concrete side peeling and damage.

[0039] In addition, since the part of the embedded lifting device exposed from the precast concrete component in the present invention is a steel wire rope, the softness of the steel wire rope is utilized to avoid being cut off, and when the operating space is limited, it only needs to be hung with the most common hook.

[0040] In summary, the embedded lifting device in the present invention does not require special lifting equipment, and can be used with a hook on the construction site, and does not require a demolding device or the like; because the wire rope is relatively soft and has very low hardness and rigidity, even if it is exposed, it will not affect the assembly of the upper and lower precast concrete components; the bonding force between the steel bars and the concrete itself is utilized, and there is no need to configure additional steel bars.

[0041] It should be added that, through experiments, it was found that in order to ensure the bearing capacity of the embedded lifting device, it is also necessary to control the distance between the two anchoring parts. The shortest distance between the two anchoring parts is preferably greater than twice the diameter of the steel bar or steel rod.

[0042] In order to control the distance between the two anchoring parts, the embedded lifting device also includes a spacing control part. The spacing control part is only a structural measure for controlling the distance between the two steel bars. It can be implemented using a variety of structures in the existing technology, such as by binding belts or welding steel bars, etc., and the present invention is not limited.

[0043] The specific structure of the pre-buried lifting device of the present invention is described below with reference to specific examples.

[0044] Example 1

[0045] Figure 1 This is a cross-sectional view of a precast concrete component including a pre-embedded lifting device in Example 1 of the present utility model; Figure 2 This is a schematic diagram of the structure of the embedded hoisting device of Example 1. Figure 1 and Figure 2 As shown, the pre-buried lifting device includes a steel wire rope 100 , two connecting sleeves 200 and two anchoring parts 310 .

[0046] In this embodiment, the distance control portion is two binding straps 410, which are respectively connected to the two anchoring portions 310 to control the distance between the two anchoring portions 310. Specifically, the two binding straps 410 can be located at different heights.

[0047] The anchoring portion 310 is linear. Figure 1 and Figure 2 The figure shows an example of two anchoring portions 310 being arranged vertically. However, the present invention is not limited to this embodiment. Personnel can also make design choices based on actual conditions. For example, the anchoring portions 310 can also be arranged at an angle, that is, the line along which the anchoring portions 310 lie is at an angle to the vertical direction. Furthermore, the two anchoring portions 310 can be parallel to each other or not. Furthermore, the line connecting the two anchoring portions 310 at the same height can be arranged along the length of the precast concrete component, along its thickness, or at an angle to its thickness.

[0048] When the two anchoring portions 310 are arranged vertically, the total length of the anchoring portions 310 can be reduced, saving material. When the two anchoring portions 310 are arranged obliquely, the shear force generated at the connecting sleeve 200 can be reduced, the force distribution is more reasonable, and the shear force generated at the connecting sleeve 200 is prevented from weakening the strength of the connecting sleeve 200.

[0049] Example 2

[0050] Figure 3 This is a schematic diagram of the structure of the embedded hoisting device of Example 2. Figure 3 As shown, the pre-buried lifting device includes a steel wire rope 100 , two connecting sleeves 200 and two anchoring parts 320 .

[0051] In this embodiment, the distance control portion is two binding straps 420, which are respectively connected to the two anchoring portions 320 to control the distance between the two anchoring portions 320. The two binding straps 420 can be located at different heights.

[0052] Different from the first embodiment, in this embodiment, the anchoring portion 320 includes a first anchoring segment 321 and a second anchoring segment 322 . Specifically, one end of the first anchoring segment 321 is connected to the connecting sleeve 200 , and the other end is connected to the second anchoring segment 322 . Figure 3 The figure shows an example in which the first anchoring segment 321 and the second anchoring segment 322 are perpendicular to each other. In this case, the anchoring portion 320 is (roughly) L-shaped. The present invention is not limited to this example. The first anchoring segment 321 and the second anchoring segment 322 may also be non-perpendicular to each other. The angle α between the first anchoring segment 321 and the second anchoring segment 322 is 0°<α<180°.

[0053] The anchoring portion 320 composed of two anchoring sections can reduce the embedding depth of the anchoring portion without reducing the load-bearing capacity, thereby saving materials.

[0054] Similar to the first embodiment, the first anchoring segments 321 of the anchoring portion 320 can also be tilted, that is, the line where the first anchoring segments 321 of the anchoring portion 320 are located has an angle with the vertical direction. In addition, the first anchoring segments 321 of the two anchoring portions 320 can be parallel to each other or not.

[0055] Example 3

[0056] Figure 4 This is a schematic diagram of the structure of the embedded hoisting device of Example 3. Figure 4 As shown, the pre-buried lifting device includes a steel wire rope 100 , two connecting sleeves 200 and two anchoring parts 330 .

[0057] In this embodiment, the spacing control part is a steel bar or steel rod 430, whose two ends are fixedly connected to the ends of the two anchoring parts 330 away from the connecting sleeve (for example, welding or integral molding, etc.), and is used to control the distance between the two anchoring parts 330.

[0058] Different from the first embodiment, in this embodiment, the anchoring portion 330 and the spacing control portion are U-shaped. The U-shaped anchoring portion 330 and the spacing control portion can reduce the burial depth of the anchoring portion without reducing the load, thereby saving materials.

[0059] Similar to the first embodiment, the anchoring portion 330 can also be arranged tilted, that is, the straight line where the anchoring portion 330 is located has an angle with the vertical direction. In addition, the two anchoring portions 330 can be parallel to each other or not.

[0060] Example 4

[0061] Figure 5 This is a schematic diagram of the structure of the pre-buried hoisting device of Example 4. Figure 5 As shown, the pre-buried lifting device includes a steel wire rope 100 , two connecting sleeves 200 and two anchoring parts 340 .

[0062] In this embodiment, the spacing control part is a steel bar or steel rod 440, whose length is greater than the distance between the ends of the two anchoring parts 340 away from the connecting sleeve. The spacing control part is fixedly connected to the ends of the two anchoring parts 340 away from the connecting sleeve (for example, welding or integral molding, etc.) to control the distance between the two anchoring parts 340.

[0063] Similar to the second and third embodiments, in this embodiment, the anchoring portion 340 and the spacing control portion can also reduce the embedding depth of the anchoring portion without reducing the load, thereby saving materials.

[0064] Similar to the first embodiment, the anchoring portion 340 can also be arranged tilted, that is, the straight line where the anchoring portion 340 is located has an angle with the vertical direction. In addition, the two anchoring portions 340 can be parallel to each other or not.

[0065] Example 5

[0066] Figure 6 This is a structural diagram of the pre-buried hoisting device of Example 5. Figure 6 As shown, the pre-buried lifting device includes a steel wire rope 100 , two connecting sleeves 200 and two anchoring parts 350 .

[0067] Different from the first embodiment, in this embodiment, the anchoring portion 350 is at least partially wavy. Figure 6As shown, the anchoring portion 350 is entirely wavy in shape, but the present invention is not limited thereto. For example, the anchoring portion may be a combination of wavy and straight shapes. The wavy anchoring portion 350 can reduce the embedding depth of the anchoring portion without reducing the load, thereby saving material.

[0068] In this embodiment, the distance control portion is two binding straps 450, which are respectively connected to the two anchoring portions 350 to control the distance between the two anchoring portions 350. The two binding straps 450 can be located at different heights.

[0069] Similar to the first embodiment, the anchoring portion 350 may also be tilted, that is, the center line of the anchoring portion 350 forms an angle with the vertical direction. In addition, the center lines of the two anchoring portions 350 may be parallel to each other or not.

[0070] Modification 1

[0071] Figure 7 This is a structural diagram of the embedded lifting device of the first modification. Figure 7 As shown, it is a variation of the first embodiment. In this variation, the two anchoring portions 310 are arranged at an angle, and the straight lines where the two anchoring portions 310 are located coincide with the straight lines where the two ends of the wire rope 100 are located.

[0072] At this time, no shear force is generated at the connecting sleeve 200, and the problem of shear force weakening the strength of this part can be completely avoided.

[0073] The utility model also provides a precast concrete component, in which the precast concrete component is provided with the above-mentioned embedded hoisting device.

[0074] During the manufacturing process, the utility model can first assemble the mold according to the size of the precast concrete component, place the embedded lifting device at the specified position, and then pour the concrete, and cure the concrete to a certain strength; then, the concrete component mold is removed to expose the steel wire rope part of the embedded lifting device, and the precast concrete component is lifted by using a hook or the like through the exposed steel wire rope.

[0075] In summary, the utility model improves the load-bearing capacity of the lifting parts by using a pre-buried lifting device composed of a steel wire rope, a connecting sleeve and an anchoring part, and does not require special lifting equipment or cutting off the exposed part. At the same time, it is suitable for thin precast concrete components.

Claims

1. A pre-buried hoisting device, characterized in that: The embedded lifting device includes a steel wire rope, two connecting sleeves and two anchoring parts. The two ends of the steel wire rope are respectively extruded and connected to one end of the two connecting sleeves, and one end of the two anchoring parts is respectively extruded, threaded or welded to the other end of the two connecting sleeves; the anchoring part is a steel bar or a steel rod.

2. The pre-buried hoisting device according to claim 1, characterized in that: One end of the steel wire rope connected to the connecting sleeve is located in the precast concrete component, and the two connecting sleeves and the two anchoring parts are all located in the precast concrete component.

3. The pre-buried hoisting device according to claim 2, characterized in that: The pre-embedded hoisting device further includes a spacing control portion for controlling the distance between two steel bars.

4. The pre-buried hoisting device according to claim 3, characterized in that: The anchoring portion is in a straight line shape, and the spacing control portion is two binding straps.

5. The pre-buried hoisting device according to claim 3, characterized in that: The anchoring portion includes a first anchoring segment and a second anchoring segment, and the angle α between the first anchoring segment and the second anchoring segment is 0°<α<180°; the spacing control portion is two binding straps.

6. The pre-buried hoisting device according to claim 3, characterized in that: The spacing control part is a steel bar or a steel rod, and both ends of the spacing control part are fixedly connected to one end of the two anchoring parts away from the connecting sleeve respectively, and the anchoring part and the spacing control part are U-shaped.

7. The pre-buried hoisting device according to claim 3, characterized in that: The spacing control part is a steel bar or a steel rod, the length of the spacing control part is greater than the distance between the ends of the two anchoring parts away from the connecting sleeve, and the spacing control part is fixedly connected to the ends of the two anchoring parts away from the connecting sleeve.

8. The pre-buried hoisting device according to claim 3, characterized in that: The anchoring portion is at least partially wavy, and the spacing control portion is two binding straps.

9. The pre-buried hoisting device according to claim 1, characterized in that: The anchoring portion is arranged vertically or inclined.

10. The pre-buried hoisting device according to claim 1, characterized in that: The two anchoring portions are parallel to each other or not parallel to each other.

11. A precast concrete component, characterized in that: The precast concrete component is provided with a pre-embedded lifting device according to any one of claims 1 to 10.

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