Cavity prefabricated composite column

Abstract

The utility model relates to the technical field of composite columns, and discloses a cavity prefabricated composite column which comprises a cavity composite column body and a base plane, composite column prefabricated steel bars and a prefabricated forming steel bar cage are arranged in the cavity composite column body, embedded steel bars are arranged in the base plane, and the prefabricated forming steel bar cage is arranged in the cavity composite column body. And positioning mounting mechanisms are fixedly mounted at the bottoms of the composite column prefabricated steel bars and the tops of the embedded steel bars. According to the cavity prefabricated composite column, through the arranged positioning and mounting mechanism, in the using process, by means of an inclined face arranged in a funnel-shaped positioning barrel, when prefabricated steel bars and embedded steel bars of the composite column are positioned and mounted, the embedded steel bars can be automatically corrected through the gravity of a column body of the cavity composite column; the embedded steel bars and the composite column prefabricated steel bars can be kept in the same center, the tedious process of hammering, knocking, positioning and butt joint is avoided, meanwhile, the installation time of the cavity prefabricated composite column is shortened, and the installation convenience of the cavity prefabricated composite column is improved.

Description

Technical Field

[0001] This utility model relates to the field of composite column technology, specifically a cavity prefabricated composite column. Background Technology

[0002] Cavity precast composite columns are a type of high-efficiency building structural component that combines precast and cast-in-place technologies. They are typically made of reinforced concrete and have internal cavities of a designed shape (such as circular or square). The precast parts are equipped with steel bars or embedded parts to ensure a firm connection with the cast-in-place parts. High-strength concrete or steel bars are often poured into the cavities to enhance the overall load-bearing capacity and seismic performance. This reduces on-site formwork and pouring time and speeds up the project progress.

[0003] In existing technologies, when installing precast hollow composite columns, the reinforcing bars at the bottom of the column need to be aligned with the pre-embedded reinforcing bars in the ground, and then locked together by rotating a threaded sleeve. However, in actual use, because the reinforcing bars inside the composite column are pre-embedded, slight misalignment may occur during the positioning and installation process due to insufficient mold precision or disturbance during concrete pouring. Workers need to use a hammer to tap the reinforcing bars at the bottom of the composite column to align them with the pre-embedded reinforcing bars in the ground. However, the hammering method is inconvenient, requiring workers to tap the bars one by one, resulting in a significant time commitment for the installation of precast hollow composite columns. Therefore, an improved precast hollow composite column is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a cavity prefabricated composite column to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cavity precast composite column, comprising a cavity composite column body and a base surface, wherein the cavity composite column body is provided with precast composite column reinforcing bars and a precast steel cage, and the base surface is provided with embedded reinforcing bars, wherein positioning and installation mechanisms are fixedly installed at the bottom of the precast composite column reinforcing bars and the top of the embedded reinforcing bars.

[0006] Preferably, the positioning and installation mechanism includes a groove block, which is fixedly installed on the top of the pre-embedded reinforcing bar. A funnel-shaped positioning cylinder is fixedly installed on the outside of the groove block. A threaded rod is fixedly installed on the bottom of the precast reinforcing bar of the composite column. A positioning ball head block is fixedly installed on the bottom of the threaded rod. A double threaded cylinder for fastening the inner and outer threads is installed on the outer thread of the threaded rod.

[0007] Preferably, the recessed block has an arc groove inside, and the bottom of the positioning ball head block is provided with a hemisphere, and the size of the hemisphere at the bottom of the positioning ball head block corresponds to the size of the arc groove inside the recessed block.

[0008] Preferably, the funnel-shaped positioning cylinder has a threaded groove inside, and the outer part of the fastening inner and outer double threaded cylinder is threadedly installed with the threaded groove inside the funnel-shaped positioning cylinder.

[0009] Preferably, the funnel-shaped positioning cylinder has a conical groove in the middle, and the bottom of the fastening inner and outer double-threaded cylinder has a conical head, and the outer side of the conical head at the bottom of the fastening inner and outer double-threaded cylinder slides in contact with the inner wall of the conical groove in the middle of the funnel-shaped positioning cylinder.

[0010] Preferably, the funnel-shaped positioning cylinder is made of high-strength steel, and the inner wall of the conical groove of the funnel-shaped positioning cylinder is embedded with a silicon carbide coating, reducing the coefficient of friction to 0.08-0.12.

[0011] Preferably, the angle of the conical groove in the middle of the funnel-shaped positioning cylinder is 30°, and the diameter of the top opening of the funnel-shaped positioning cylinder is twice that of the precast steel bars of the composite column.

[0012] Preferably, the surface of the arc groove inside the groove block is galvanized, and the roughness Ra ≤ 1.6 μm.

[0013] Preferably, the hemispherical part at the bottom of the positioning ball head block is made of high carbon steel, with a nitrided surface and a hardness ≥ HRC50.

[0014] Preferably, the funnel-shaped positioning cylinder is provided with an annular stiffening rib at its root, with a thickness ≥8mm, to disperse local stress to below 150MPa.

[0015] Compared with the prior art, this utility model provides a cavity prefabricated composite column, which has the following beneficial effects:

[0016] This precast composite column with cavity, through its positioning and installation mechanism, utilizes an inclined surface inside a funnel-shaped positioning cylinder to automatically correct the precast and embedded steel bars during the positioning and installation process. This ensures that the precast and embedded steel bars are centered, avoiding the tedious hammering and positioning process, reducing installation time, and improving ease of installation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the appearance and structure of this utility model;

[0019] Figure 2 This is a bottom view of the external structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the external structure of the positioning and installation mechanism of this utility model;

[0021] Figure 4 This is a cross-sectional view of the positioning and installation mechanism of this utility model.

[0022] Figure 5 This is a cross-sectional view and exploded view of the positioning and installation mechanism of this utility model.

[0023] In the diagram: 1. Hollow composite column body; 2. Positioning and installation mechanism; 21. Groove block; 22. Funnel-shaped positioning cylinder; 23. Threaded rod; 24. Positioning ball head block; 25. Fastening inner and outer double threaded cylinder; 3. Precast steel bars for composite column; 4. Precast steel cage; 5. Base surface; 6. Embedded steel bars. Detailed Implementation

[0024] The following description is provided to enable those skilled in the art to implement and use the present invention and to incorporate it into specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0025] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that practice of the present invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed representation to avoid obscuring the present invention.

[0026] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0027] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0031] Example:

[0032] Please see Figure 1-5 This utility model provides a technical solution: a cavity precast composite column, including a cavity composite column body 1 and a base surface 5. The cavity composite column body 1 is provided with precast composite column steel bars 3 and precast steel cage 4. The base surface 5 is provided with embedded steel bars 6. The bottom of the precast composite column steel bars 3 and the top of the embedded steel bars 6 are both fixedly installed with positioning and installation mechanisms 2.

[0033] Furthermore, the positioning and installation mechanism 2 includes a groove block 21, which is fixedly installed on the top of the pre-embedded steel bar 6. A funnel-shaped positioning cylinder 22 is fixedly installed on the outside of the groove block 21. A threaded rod 23 is fixedly installed on the bottom of the precast steel bar 3 of the composite column. A positioning ball head block 24 is fixedly installed on the bottom of the threaded rod 23. A double threaded cylinder 25 for fastening the inner and outer threads is installed on the outer thread of the threaded rod 23. Through the positioning and installation mechanism 2, when the precast steel bar 3 of the composite column is connected to the pre-embedded steel bar 6, it can assist in positioning and connecting them. By utilizing the weight of the cavity composite column body 1 itself, the inconvenience of hammering for positioning can be avoided.

[0034] Furthermore, the groove block 21 has an arc groove inside, and the bottom of the positioning ball head block 24 is provided with a hemisphere. The size of the hemisphere at the bottom of the positioning ball head block 24 corresponds to the size of the arc groove inside the groove block 21. By allowing the hemisphere to enter the arc groove, the two can be tightly connected to complete the positioning connection between the precast steel bars 3 and the embedded steel bars 6 of the composite column, so that the corresponding precast steel bars 3 and embedded steel bars 6 of the composite column are kept at the same center.

[0035] Furthermore, the funnel-shaped positioning cylinder 22 has a threaded groove inside, and the outer part of the inner and outer double threaded cylinder 25 is threadedly installed with the threaded groove inside the funnel-shaped positioning cylinder 22. By installing the inner part of the funnel-shaped positioning cylinder 22 with the outer part of the inner and outer double threaded cylinder 25, the precast steel bars 3 and the embedded steel bars 6 of the composite column after docking can be fixed, so that the cavity composite column 1 can be stably fixed in an environment without relying on external support.

[0036] Furthermore, a conical groove is provided in the middle of the funnel-shaped positioning cylinder 22, and a conical head is provided at the bottom of the inner and outer double-threaded cylinder 25. The outer side of the conical head at the bottom of the inner and outer double-threaded cylinder 25 slides in contact with the inner wall of the conical groove in the middle of the funnel-shaped positioning cylinder 22. By inserting the conical head into the inside of the funnel-shaped positioning cylinder 22, it is possible to avoid the formation of a cavity inside the funnel-shaped positioning cylinder 22.

[0037] Furthermore, the funnel-shaped positioning cylinder 22 is made of high-strength steel, and the inner wall of the conical groove of the funnel-shaped positioning cylinder 22 is embedded with a silicon carbide coating, which reduces the coefficient of friction to 0.08-0.12. This is used to enhance the structure of the funnel-shaped positioning cylinder 22, reduce friction, and allow the positioning ball head block 24 to slide smoothly on the inner wall of the funnel-shaped positioning cylinder 22, so that the precast steel bars 3 and the embedded steel bars 6 of the composite column can be quickly aligned.

[0038] Furthermore, the conical groove in the middle of the funnel-shaped positioning cylinder 22 has an inclination angle of 30°, and the opening diameter at the top of the funnel-shaped positioning cylinder 22 is twice that of the precast steel bars 3 of the composite column. This is to balance the sliding efficiency and the structural compactness, and to prevent jamming caused by too small an angle and increased material consumption caused by too large an angle.

[0039] Furthermore, the inner arc groove surface of the groove block 21 is galvanized with a roughness Ra≤1.6μm to reduce friction with the positioning ball head block 24 and make the positioning fit smoother.

[0040] Furthermore, the hemispherical part at the bottom of the positioning ball head block 24 is made of high carbon steel with nitriding treatment and a hardness ≥ HRC50, which is used to enhance wear resistance and strengthen structural stability.

[0041] Furthermore, an annular stiffening rib with a thickness of ≥8mm is provided at the root of the funnel-shaped positioning cylinder 22 to disperse local stress to below 150MPa and enhance the installation stability of the funnel-shaped positioning cylinder 22.

[0042] In actual operation, when this device is used, during the installation between the hollow composite column 1 and the base surface 5, the hollow composite column 1 is first lifted by the prefabricated steel cage 4 using an external hoisting structure, placing it on top of the embedded steel bars 6. By roughly aligning the prefabricated steel bars 3 and the embedded steel bars 6, the hollow composite column 1 is lowered, allowing the positioning ball head block 24 to enter the funnel-shaped positioning cylinder 22. Utilizing the weight of the hollow composite column 1 itself, the positioning ball head block 24, upon entering the funnel-shaped positioning cylinder 22, experiences a slight offset due to the prefabricated steel bars 3, causing the positioning ball head block 24 to... It will contact the inclined inner wall of the funnel-shaped positioning cylinder 22 and continue to descend until the positioning ball head block 24 enters the cylindrical space at the bottom of the funnel-shaped positioning cylinder 22. At this time, the cavity composite column 1 will then descend, and the positioning ball head block 24 will be inserted into the groove block 21, automatically completing the positioning and docking of the precast steel bar 3 and the pre-embedded steel bar 6 of the composite column without the need for hammering correction. At this time, rotate the fastening inner and outer double threaded cylinder 25 to make the fastening inner and outer double threaded cylinder 25 begin to descend, and make the outer side of the fastening inner and outer double threaded cylinder 25 connect with the inner thread of the funnel-shaped positioning cylinder 22, thus completing the fixing of the precast steel bar 3 and the pre-embedded steel bar 6 of the composite column.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A precast hollow composite column, comprising a hollow composite column body (1) and a base surface (5), characterized in that: The cavity composite column body (1) is provided with precast composite column steel bars (3) and precast steel cage (4) inside. The base surface (5) is provided with embedded steel bars (6). The bottom of the precast composite column steel bars (3) and the top of the embedded steel bars (6) are both fixedly installed with positioning installation mechanisms (2).

2. The cavity prefabricated composite column according to claim 1, characterized in that: The positioning and installation mechanism (2) includes a groove block (21), which is fixedly installed on the top of the pre-embedded steel bar (6). A funnel-shaped positioning cylinder (22) is fixedly installed on the outside of the groove block (21). A threaded rod (23) is fixedly installed at the bottom of the precast steel bar (3) of the composite column. A positioning ball head block (24) is fixedly installed at the bottom of the threaded rod (23). A double threaded cylinder (25) for fastening inner and outer threads is installed on the outer thread of the threaded rod (23).

3. A precast composite column with a cavity according to claim 2, characterized in that: The groove block (21) has an arc groove inside, and the bottom of the positioning ball head block (24) is provided with a hemisphere, and the size of the hemisphere provided at the bottom of the positioning ball head block (24) corresponds to the size of the arc groove inside the groove block (21).

4. A precast composite column with a cavity according to claim 2, characterized in that: The funnel-shaped positioning cylinder (22) has a threaded groove inside, and the outer side of the fastening inner and outer double threaded cylinder (25) is threadedly installed with the threaded groove inside the funnel-shaped positioning cylinder (22).

5. A precast composite column with a cavity according to claim 2, characterized in that: The funnel-shaped positioning cylinder (22) has a conical groove in the middle, and the bottom of the fastening inner and outer double threaded cylinder (25) has a conical head, and the outside of the conical head at the bottom of the fastening inner and outer double threaded cylinder (25) slides in contact with the inner wall of the conical groove in the middle of the funnel-shaped positioning cylinder (22).

6. A precast composite column with a cavity according to claim 2, characterized in that: The funnel-shaped positioning cylinder (22) is made of high-strength steel, and the inner wall of the conical groove of the funnel-shaped positioning cylinder (22) is embedded with a silicon carbide coating, reducing the friction coefficient to 0.08-0.

12.

7. A precast composite column with a cavity according to claim 2, characterized in that: The angle of the conical groove in the middle of the funnel-shaped positioning cylinder (22) is 30°, and the diameter of the top opening of the funnel-shaped positioning cylinder (22) is twice that of the precast steel bars (3) of the composite column.

8. A precast composite column with a cavity according to claim 2, characterized in that: The inner arc groove of the groove block (21) is galvanized and has a roughness Ra≤1.6μm.

9. A precast composite column with a cavity according to claim 2, characterized in that: The hemisphere at the bottom of the positioning ball head block (24) is made of high carbon steel, with nitriding treatment on the surface and a hardness ≥ HRC50.

10. A precast composite column with a cavity according to claim 2, characterized in that: The funnel-shaped positioning cylinder (22) is provided with an annular stiffening rib at its root, with a thickness ≥8mm, to disperse local stress to below 150MPa.

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