Steel column foot anchor bolt lengthening device

Abstract

The utility model relates to the technical field of steel structure buildings, in particular to a lengthening device for insufficient length of a steel column foot anchor bolt, which comprises a steel column foot bottom plate, a column foot anchor bolt, an internal thread sleeve, an external thread sleeve and a sleeve nut, and the steel column foot bottom plate is a plate-shaped structure which is used for expanding the contact area between the steel column foot bottom plate and a concrete foundation; one end of the column foot anchor bolt is embedded into the concrete foundation, and the other end extends upwards to be connected with a steel column foot bottom plate; the internal and external thread sleeve is positioned above the steel column foot bottom plate, is connected with the column foot anchor bolt and is used for lengthening the column foot anchor bolt; the sleeve nut is located above the steel column foot bottom plate, connected with the internal and external thread sleeve and used for fixing the internal and external thread sleeve and the column foot anchor bolt. The device is simple in structure and low in cost, the problem that a nut cannot be installed due to the fact that the exposed length of the column foot anchor bolt is too short is solved, meanwhile, a butt joint nut is replaced with the internal and external threaded sleeves, the process that the column foot bolt is cut into two parts is omitted, the structure of the column foot lengthening device is simplified, and construction steps are optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure buildings, and specifically refers to an extension device for the insufficient length of the anchor bolts at the column foot of a steel column. Background Art

[0002] In steel structure buildings, the connection methods between the main structure columns and the foundation mainly adopt embedded and exposed column feet. As a simple and economical column foot, the exposed column foot is widely used in industrial and civil steel structure buildings. The exposed column foot is connected to the concrete foundation through column foot anchor bolts. During on-site construction, the elevation of the anchor bolts often changes due to errors in height lofting, unreasonable erection of embedded parts, and collision between the vibrating rod and the anchor bolts during pouring, resulting in too short exposed length of the anchor bolts in the later stage, and the situation that nuts cannot be installed or the exposed length does not meet the design requirements.

[0003] To solve the above problems, in the patent with the application number 202310938332.3, a construction method and structure for mechanical reinforcement of the anchor bolts at the column foot of a steel column are disclosed, including: anchor bolts, column base plates, steel backing plates, butt nuts, and nuts. The anchor bolts are divided into two sections, the upper anchor bolt and the lower anchor bolt. The lower anchor bolt passes through the installation hole of the column base plate and is embedded in the concrete foundation, and the top of the lower anchor bolt is higher than the column base plate; the steel backing plate is arranged on the column base plate, and the steel backing plate has through holes corresponding to the positions of the installation holes of the column base plate; a butt nut is arranged between the upper anchor bolt and the lower bolt. The butt nut passes through the through hole of the steel backing plate, and the lower end of the butt nut enters the installation hole of the column base plate. The lower end of the upper anchor bolt is connected to the upper end of the lower anchor bolt through the butt nut, and the upper end of the upper anchor bolt is higher than the steel backing plate; the nut is installed on the upper end of the upper anchor bolt above the steel backing plate. The present invention solves the problem that nuts cannot be installed due to too short anchor bolts at the column foot node by dividing the anchor bolts into two sections and extending their exposed length through a socket reinforcement method.

[0004] The technical features of this invention are very distinct. The butt nut is used to extend the anchor bolt that is divided into two parts, so as to achieve the purpose of extending the anchor bolt at the column foot to install the nut. However, the structure of this invention is bloated and complex. The longer the anchor bolt is extended, the longer the butt nut is and the thicker the steel backing plate is; there are too many components and the process is complex. It is necessary to cut the anchor bolt into two sections, which is not conducive to rapid on-site construction. Content of the Utility Model

[0005] In view of the above disadvantages of the prior art, the purpose of the present utility model is to provide an extension device for the anchor bolts at the column foot of a steel column, which solves the problem that nuts cannot be installed due to too short anchor bolts at the column foot by extending the anchor bolts at the column foot, and at the same time optimizes the disadvantages of the bloated structure and complex construction of the existing anchor bolt extension technology.

[0006] The technical solution of the present utility model is: an extension device for the anchor bolts at the column foot of a steel column, including:

[0007] Steel column base plate, which is a plate - shaped structure at the foot of the steel column for expanding the contact area with the concrete foundation;

[0008] Column base anchor bolts, which are connected to the concrete foundation, with one end buried inside the concrete foundation and the other end extending upward for connecting to the steel column base plate to conduct the stress received by the steel column to the concrete foundation;

[0009] Internal and external thread sleeve, which is located above the steel column base plate and connected to the column base anchor bolt for lengthening the column base anchor bolt;

[0010] Sleeve nut, which is located above the steel column base plate and connected to the internal and external thread sleeve for fixing the internal and external thread sleeve and the column base anchor bolt.

[0011] A steel column base anchor bolt lengthening device according to the present application, wherein the steel column base plate is provided with a first through - hole, and the diameter of the first through - hole is not less than the diameter of the column base anchor bolt.

[0012] A steel column base anchor bolt lengthening device according to the present application, wherein the upward - extending end of the column base anchor bolt is higher than the steel column base plate, and the length of the part higher than the steel column base plate is not less than the length required for the connection between the column base anchor bolt and the internal and external thread sleeve.

[0013] A steel column base anchor bolt lengthening device according to the present application, when the length of the part of the column base anchor bolt higher than the steel column base plate is less than the length required for the connection between the column base anchor bolt and the internal and external thread sleeve, the first through - hole of the steel column base plate is reamed, and the diameter of the reamed first through - hole is not less than the outer diameter of the internal and external thread sleeve.

[0014] A steel column base anchor bolt lengthening device according to the present application, when the first through - hole of the steel column base plate is reamed by flame cutting, heat - insulating coating protection is carried out on the column base anchor bolt.

[0015] A steel column base anchor bolt lengthening device according to the present application, wherein the internal and external thread sleeve includes internal threads and external threads, the internal threads are thread - matched with the column base anchor bolt; the external threads are thread - matched with the internal threads of the sleeve nut.

[0016] A steel column base anchor bolt lengthening device according to the present application, wherein the inner diameter of the internal and external thread sleeve is matched with the diameter of the column base anchor bolt, and the two can be bolted together through the matching threads.

[0017] A steel column base anchor bolt lengthening device according to the present application, wherein the outer diameter of the internal and external thread sleeve is matched with the inner diameter of the sleeve nut, and the two can be bolted together through the matching threads.

[0018] A steel column base anchor bolt lengthening device according to the present application further includes a steel backing plate: the steel backing plate is located between the steel column base plate and the sleeve nut.

[0019] According to an extension device for steel column base bolts of the present application, the steel backing plate is provided with a second through hole, and the diameter of the second through hole is not less than the outer diameter of the internal and external thread sleeve.

[0020] The advantages of the present application are as follows:

[0021] 1. The structure of the present application is simple and the cost is low. By only using the internal and external thread sleeve to extend the column base bolt, while solving the problem of too short exposed length of the column base bolt, the butt nut of the column base bolt connector is cancelled, and the thickness of the steel backing plate is reduced.

[0022] 2. The present application is applicable to column base bolts with different exposed lengths. The same internal and external thread sleeve can be used to extend column base bolts with different reserved lengths, which has strong practicability and great popularization value.

[0023] 3. When the exposed length of the column base bolt is not enough to connect the internal and external thread sleeve, the first through hole of the steel column base plate can also be reamed to make the exposed length of the column base bolt reach the length required for connecting with the internal and external thread sleeve.

[0024] 4. The present application only needs to ream the column base plate and add internal and external thread sleeve components, without the need for repair welding. The on-site construction process is simple and the transformation cost is low.

[0025] 5. The present application can be constructed in various ways. When using flame cutting to ream the first through hole of the steel column base plate, only the column base bolt needs to be heat-insulated and coated.

[0026] 6. The threads between the column base bolt, the internal and external thread sleeve and the sleeve nut of the present application match each other, which is convenient for manufacturers to produce and process and for actual construction and installation.

[0027] 7. The inner diameter of the internal and external thread sleeve matches the diameter of the column base bolt, making the connection between the two more firm when bolted.

[0028] 8. The outer diameter of the internal and external thread sleeve matches the inner diameter of the sleeve nut, making the connection between the two more firm when bolted.

[0029] 9. The present application also includes a steel backing plate, which can effectively reduce the force on the sleeve nut and ensure the connection effect between the sleeve nut and the internal and external thread sleeve.

[0030] 10. The present application replaces the butt nut with an internal and external thread sleeve, eliminates the process of cutting the column base bolt into two parts, simplifies the structure of the column base extension device, and optimizes the construction steps. Description of the Drawings

[0031] To more clearly illustrate the technical solution of the present utility model, the accompanying drawings required for describing the present utility model will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0032] Figure 1 It is a schematic cross-sectional view of the whole of the present utility model;

[0033] Figure 2 It is a schematic cross-sectional view of the whole of the present utility model after reaming the steel column base plate;

[0034] Wherein: 1 - steel column base plate; 2 - column base anchor bolt; 3 - internal and external thread sleeve; 4 - sleeve nut; 11 - first through hole; 5 - steel backing plate; 51 - second through hole. Specific embodiments

[0035] The embodiments of the present utility model will be described in detail below. The same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "axial", "radial", "circumferential", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] This application relates to a device for extending the column base anchor bolts of a steel column, which is used to solve the problem that nuts cannot be installed due to the too short column base anchor bolts. By connecting internal and external thread sleeves to the column base anchor bolts, the purpose of extension is achieved, and the disadvantages of the bloated structure and complex construction of the existing anchor bolt extension technology are optimized.

[0040] Specifically, as Figure 1 shown, the device for extending the column base anchor bolts of a steel column in this application includes:

[0041] The steel column base floor slab 1, the column base anchor bolt 2, the internal and external thread sleeve 3 and the sleeve nut 4. The steel column base floor slab 1 is a plate-like structure at the steel column base for expanding the contact area with the concrete foundation. A first through hole 11 is reserved on the steel column base floor slab 1; the column base anchor bolt 2 is connected to the concrete foundation, one end is buried inside the concrete foundation, and the other end extends upward for connecting the steel column base floor slab 1, and is used to conduct the stress borne by the steel column to the concrete foundation; the internal and external thread sleeve 3 is located above the steel column base floor slab 1 and is connected to the column base anchor bolt 2 for extending the column base anchor bolt 2; the sleeve nut 4 is located above the steel column base floor slab 1 and is connected to the internal and external thread sleeve 3 for fixing the internal and external thread sleeve 3 and the column base anchor bolt 2.

[0042] During actual construction, first, one end of the column base anchor bolt 2 is buried inside the concrete foundation along the direction perpendicular to the concrete foundation, and the other end passes through the first through hole 11 reserved on the steel column base floor slab 1. Then, the internal and external thread sleeve 3 is connected to the end of the column base anchor bolt 2 passing through the first through hole 11 of the steel column base floor slab 1. Finally, the sleeve nut 4 is connected to the internal and external thread sleeve 3.

[0043] Using the internal and external thread sleeve 3 to extend the column base anchor bolt 2 can effectively solve the problem of insufficient exposed length of the column base anchor bolt 2, eliminate the process step of cutting the column base anchor bolt 2 into upper and lower sections, and cancel the butt nut component connecting the two sections of the column base anchor bolt 2, making the actual construction more convenient and fast.

[0044] In some embodiments, the situation where the exposed length of the column base anchor bolt 2 is insufficient to connect the internal and external thread sleeve 3 is optimized. Specifically, as Figure 2 shown, the first through hole 11 on the steel column base floor slab 1 is reamed, so that the diameter of the first through hole 11 is slightly larger than the outer diameter of the internal and external thread sleeve 3. In this embodiment, the diameter of the first through hole 11 is the outer diameter D of the internal and external thread sleeve 3 + 8 mm.

[0045] During actual construction, when reaming the first through hole 11, flame cutting can be used for reaming. Before reaming, heat insulation and coating protection are carried out on the column base anchor bolt 2. After reaming is completed, the internal and external thread sleeve 3 is passed through the first through hole 11 and connected to the column base anchor bolt 2.

[0046] In some embodiments, the structures of the column base anchor bolts 2, the internal and external threaded sleeves 3, and the sleeve nuts 4 are optimized. Specifically, as Figure 1 shown, the inner diameter of the internal and external threaded sleeve 3 matches the diameter of the column base anchor bolt 2, enabling the internal and external threaded sleeve 3 and the column base anchor bolt 2 to be stably connected; the outer diameter of the internal and external threaded sleeve 3 matches the inner diameter of the sleeve nut 4, enabling the internal and external threaded sleeve 3 and the sleeve nut 4 to be stably connected.

[0047] Furthermore, the internal and external threaded sleeve 3 includes an internal thread and an external thread. The internal thread is thread-matched with the column base anchor bolt 2, and the two can form a stable bolt connection; the external thread is thread-matched with the internal thread of the sleeve nut 4, and the two can form a stable bolt connection.

[0048] During actual construction, first bolt-connect the internal and external threaded sleeve 3 with the exposed part of the column base anchor bolt 2, then bolt-connect the sleeve nut 4 with the internal and external threaded sleeve 3, and fasten it above the steel column base plate 1.

[0049] The column base anchor bolt 2 and the internal and external threaded sleeve 3, and the internal and external threaded sleeve 3 and the sleeve nut 4 are bolt-connected through matching threads, which can effectively enhance the stability of the steel column base anchor bolt lengthening device, and the connection between the steel column and the concrete foundation is also more firm.

[0050] In some embodiments, the structure of the steel column base anchor bolt lengthening device is optimized. Specifically, as Figure 1 shown, in this embodiment, it further includes a steel backing plate 5. The steel backing plate 5 is located between the steel column base plate 1 and the sleeve nut 4, and the steel backing plate 5 is provided with a second through hole 51. The diameter of the second through hole 51 is not less than the outer diameter of the internal and external threaded sleeve 3. The steel backing plate 5 can effectively reduce the force on the sleeve nut 4 and ensure the connection effect between the sleeve nut 4 and the internal and external threaded sleeve 3.

[0051] During specific construction, first bury one end of the column base anchor bolt 2 into the concrete foundation along the direction perpendicular to the concrete foundation, and the other end passes through the first through hole 11 reserved on the steel column base plate 1. Then bolt-connect the internal and external threaded sleeve 3 with the exposed end of the column base anchor bolt 2 through threads. When the exposed length of the column base anchor bolt 2 is not sufficient to be bolt-connected with the internal and external threaded sleeve 3, then ream the first through hole 11 on the steel column base plate 1. When reaming is carried out by flame cutting, heat insulation and coating protection need to be carried out on the column base anchor bolt 2. After the reaming treatment is completed, then bolt-connect the internal and external threaded sleeve 3 with the exposed end of the column base anchor bolt 2. Then sleeved the steel backing plate 5 on the internal and external threaded sleeve 3, and the internal and external threaded sleeve 3 passes through the second through hole 51 on the steel backing plate 5. Finally, bolt-connect the sleeve nut 4 with the internal and external threaded sleeve 3 through threads.

[0052] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed for the present utility model is defined by the appended claims and their equivalents.

Claims

1. A steel column foot anchor bolt lengthening device, characterized in that: include: A steel column foot plate (1), wherein the steel column foot plate (1) is a plate-like structure of the steel column foot used to expand the contact area with the concrete foundation; A column foot anchor bolt (2), wherein the column foot anchor bolt (2) is connected to the concrete foundation, one end of the column foot anchor bolt (2) is buried in the concrete foundation, and the other end extends upward to connect to the steel column foot plate (1), so as to transmit the stress of the steel column to the concrete foundation; An internal and external threaded sleeve (3), the internal and external threaded sleeve (3) is located above the steel column foot bottom plate (1), connected to the column foot anchor bolt (2), and used to extend the column foot anchor bolt (2); A sleeve nut (4) is located above the steel column foot bottom plate (1), connected to the internal and external threaded sleeve (3), and used to fix the internal and external threaded sleeve (3) and the column foot anchor bolt (2).

2. A steel column foot anchor bolt lengthening device as claimed in claim 1, characterized in that: The steel column foot bottom plate (1) is provided with a first through hole (11), and the diameter of the first through hole (11) is not less than the diameter of the column foot anchor bolt (2).

3. A steel column foot anchor bolt lengthening device as claimed in claim 1, characterized in that: One end of the column foot anchor bolt (2) extending upward is higher than the steel column foot bottom plate (1), and the length of the portion higher than the steel column foot bottom plate (1) is not less than the length required for the column foot anchor bolt (2) to be connected to the internal and external threaded sleeve (3).

4. A steel column foot anchor bolt lengthening device as claimed in claim 3, characterized in that: When the length of the portion of the column foot anchor bolt (2) that protrudes above the steel column foot bottom plate (1) is less than the length required for the column foot anchor bolt (2) to be connected to the internal and external threaded sleeve (3), the first through hole (11) of the steel column foot bottom plate (1) is expanded, and the diameter of the expanded first through hole (11) is not less than the outer diameter of the internal and external threaded sleeve (3).

5. A steel column foot anchor bolt lengthening device as claimed in claim 4, characterized in that: When the hole enlarging process for the first through hole (11) of the steel column foot bottom plate (1) is performed by flame cutting, the column foot anchor bolt (2) is subjected to heat insulation coating protection.

6. A steel column foot anchor bolt lengthening device as claimed in claim 1, characterized in that: The internal and external threaded sleeve (3) comprises an internal thread and an external thread, wherein the internal thread matches the thread of the column foot anchor bolt (2); and the external thread matches the internal thread of the sleeve nut (4).

7. A steel column foot anchor bolt lengthening device as claimed in claim 6, characterized in that: The inner diameter of the internal and external threaded sleeve (3) matches the diameter of the column foot anchor bolt (2), and the two can be connected together through matching threaded bolts.

8. A steel column foot anchor bolt lengthening device as claimed in claim 6, characterized in that: The outer diameter of the internal and external threaded sleeve (3) matches the inner diameter of the sleeve nut (4), and the two can be bolted together via matching threads.

9. A steel column foot anchor bolt lengthening device as claimed in claim 1, characterized in that: It also comprises a steel pad (5), wherein the steel pad (5) is located between the steel column foot plate (1) and the sleeve nut (4).

10. A steel column foot anchor bolt lengthening device as claimed in claim 9, characterized in that: The steel backing plate (5) is provided with a second through hole (51), and the diameter of the second through hole (51) is not less than the outer diameter of the internal and external threaded sleeve (3).

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