Protection device for embedded bolt of column foot

Abstract

The utility model discloses a protection device for a column foot embedded bolt, which belongs to the technical field of civil engineering construction and comprises a hollow sleeve, connecting plates are fixedly arranged on the top surface and the bottom surface of the hollow sleeve respectively, and connecting holes are formed in the centers of the connecting plates; common nuts are fixedly welded to the bottoms of the connecting plates on the bottom surface, and limiting nuts are fixedly welded to the tops of the connecting plates on the top surface; the positioning ruler penetrates into the hollow sleeve from the connecting plate on the top surface; the length of the positioning ruler is equal to the total length after the hollow sleeve, the connecting plate, the common nut and the limiting nut are connected. The exposed part of the embedded part is arranged in the hollow sleeve and the common nut, so that concrete is prevented from being polluted, and a threaded rod of the exposed part of the embedded part is prevented from being damaged; the overhanging length of the embedded part is enlarged through the protection device, whether the embedded part is inclined or not, whether adjacent embedded parts are not aligned or not and whether the embedded part shifts in the vertical direction or not can be observed more obviously, and the installation precision of the embedded part is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to civil engineering construction technical field, concretely relates to a protection device of column foot embedded bolt. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] The column foot is the key part of bearing load from the upper structure (such as beam, floor slab etc.), and the embedded parts such as bolt and steel bar etc. ensure that the load can be smoothly transferred through close connection, and the stability of the overall structure is maintained. The embedded part of the column foot is an important component in the building structure, and its construction quality is crucial to the stability and safety of the structure.

[0004] The embedded bolt is the most common embedded part, and is usually used to fix the column foot on the foundation. They can be L-shaped, T-shaped or straight rod type, and are installed in the concrete foundation; after the concrete curing is completed, the column foot is fixed on the exposed part of the embedded part through the nut.

[0005] However, when installing the embedded part, since the embedded part is arranged in the steel reinforcement cage, the length exposed outside the steel reinforcement cage is limited, and it is not easy to find out whether the embedded part is deviated by observing the exposed part of the embedded part; and the threads of the exposed part of the embedded part are easily contaminated by concrete, mortar and other materials during pouring, and such contamination mainly comes from the splashing of concrete, or the mud flows into the threads of the embedded part due to vibration, thereby causing difficulty in subsequent installation. UTILITY MODEL CONTENTS

[0006] In view of the above problems, the utility model provides a protection device of column foot embedded bolt, which sets the part of the embedded part exposed above the surface of the foundation in the hollow sleeve and the ordinary nut, can prevent the concrete from contaminating and damaging the threaded rod of the part of the embedded part exposed above the surface of the foundation during pouring the foundation; at the same time, the protection device enlarges the overhanging length of the embedded part, so that whether the embedded part is inclined, whether the adjacent embedded parts are not aligned, and whether the embedded part is shifted in the vertical direction can be more obviously observed, which helps to improve the installation accuracy of the embedded part and improve the construction quality of the embedded part.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A protection device of column foot embedded bolt, comprising a hollow sleeve, the top surface and the bottom surface of the hollow sleeve are respectively fixedly provided with a connecting plate, a connecting hole is formed in the center of the connecting plate of the bottom surface, and the bottom of the connecting plate of the bottom surface is fixedly welded with an ordinary nut, and the top of the connecting plate of the top surface is fixedly welded with a limiting nut;

[0009] The positioning ruler is inserted into the hollow sleeve from the connecting plate of the top surface, and the length of the positioning ruler is equal to the total length of the hollow sleeve, the connecting plate, the common nut and the limiting nut after being connected.

[0010] Preferably, the common nut and the limiting nut are provided with a hole in the middle, the connecting hole of the connecting plate has a diameter larger than that of the hole in the middle of the limiting nut or the common nut, but smaller than the outer diameter of the limiting nut or the common nut.

[0011] Preferably, the positioning ruler is a cylindrical rod with scales, and the scales on the rod increase gradually from top to bottom, and the scale at the top of the rod is zero.

[0012] Preferably, the connecting plate at the center of the bottom surface is used for penetrating through the embedded part, and the top of the embedded part is in contact with the bottom of the positioning ruler in the hollow sleeve.

[0013] Preferably, the embedded part is embedded in a foundation reinforcement cage to be poured, and the threaded rod of the embedded part protrudes from the foundation surface by a length for connecting a column foot.

[0014] Preferably, the hole in the middle of the common nut is provided with internal threads, and the specification of the internal threads is consistent with that of the external threads of the threaded rod of the embedded part.

[0015] Preferably, the connecting plate is a steel plate with the same size as the cross section of the hollow sleeve.

[0016] Preferably, the hole in the middle of the limiting nut is not provided with threads, and the hole in the middle is provided with an elastic layer.

[0017] Preferably, the inner radius of the elastic layer is equal to the radius of the positioning ruler.

[0018] Preferably, the outer circle of the limiting nut is hexagonal or square.

[0019] Compared with the prior art, the utility model has the advantages and positive effects that:

[0020] The utility model sets the protection device on the embedded part, sets the part of the embedded part exposed above the foundation surface in the hollow sleeve and the common nut, can prevent the concrete from polluting and damaging the threaded rod of the part of the embedded part exposed above the foundation surface when pouring the foundation, and can observe more obviously whether the embedded part is inclined, whether the adjacent embedded parts are not aligned, and whether the embedded part is displaced in the vertical direction, so as to help improve the installation precision of the embedded part and improve the construction quality of the embedded part.

[0021] The protection device has the characteristics of simple structure and convenient construction, when the installation position of the embedded part is correct and the embedded part is connected with the protection device, the bottom surface of the ordinary nut of the hollow sleeve is consistent with the elevation of the foundation surface, the surface work is facilitated during on-site pouring, and pouring over the elevation is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of this utility model form a part of the disclosure of this utility model and serve to provide further understanding of the utility model, and the illustrative embodiments of the utility model and their descriptions serve to explain the utility model, and do not constitute an improper limitation on the utility model.

[0023] Figure 1 is an exploded view of the protection device of the utility model embodiment;

[0024] Figure 2 is a schematic view of the positioning ruler of the utility model embodiment;

[0025] Figure 3 is a schematic view of the connecting plate of the utility model embodiment;

[0026] Figure 4 is a schematic view of the ordinary nut of the utility model embodiment;

[0027] Figure 5 is a schematic view of the limiting bolt of the utility model embodiment;

[0028] Figure 6 is a process schematic view of the installation and dismounting of the protection device on the embedded part of the utility model embodiment;

[0029] In the drawings:

[0030] 1, ordinary nut; 2, connecting plate; 3, sleeve; 4, limiting nut; 5, positioning ruler; 6, embedded part; 7, foundation surface; 8, column foot. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed description is all exemplary, and aims to provide further explanation of the utility model. Unless otherwise specified, all technical and scientific terms used in this paper have the same meaning as that generally understood by the ordinary skilled in the art to which the utility model belongs.

[0032] The utility model will be described in detail below in combination with the drawings, and the protection device of a column foot embedded bolt disclosed in the embodiment is as follows: Figure 1 、 Figure 3 、 Figure 6As shown, the hollow sleeve 3 is fixedly connected with the connecting plate 2 at the top and bottom surfaces, and the connecting plate 2 is provided with a connecting hole at the center. The connecting plate 2 at the top surface penetrates the positioning ruler 5, and the connecting plate 2 at the bottom surface penetrates the embedded part 6. The top of the embedded part 6 is in contact with the bottom of the positioning ruler 5 in the hollow sleeve 3. In the embodiment, the embedded part 6 is an L-shaped anchor bolt, which is embedded in the foundation reinforcement cage to be poured, and the threaded rod of the embedded part 6 protrudes from the foundation surface 7 by a length for connecting the column foot. In the embodiment, the hollow sleeve 3 is made of a square steel pipe, and the connecting plate 2 is a steel plate with the same size as the cross section of the hollow sleeve 3. In other ways, the hollow sleeve 3 can also be made of other shapes, such as a cylinder, but the size of the hollow sleeve 3 needs to be greater than the diameter of the positioning ruler 5 and the threaded rod of the embedded part 6.

[0033] As shown in Figure 1 , Figure 4 , Figure 6 , the bottom of the connecting plate 2 at the bottom surface is fixedly welded with a common nut 1, the middle of the common nut is provided with a hole, and the hole is provided with internal threads, which need to be consistent with the external thread specifications of the threaded rod of the embedded part 6, for reliably connecting the hollow sleeve 3 and the embedded part 6 together.

[0034] As shown in Figure 1 , Figure 5 , the top of the connecting plate 2 at the top surface is fixedly welded with a limiting nut 4, and the middle of the limiting nut 4 is provided with a hole. It should be noted that the middle of the limiting nut 4 is not provided with threads, and a ring-shaped elastic spacer (not shown in the figure) is arranged at the middle of the limiting nut 4. In the embodiment, the elastic spacer can be made of rubber material and is arranged at the middle of the limiting nut 4 by pasting. The diameter of the middle of the limiting nut 4 is greater than the diameter of the positioning ruler, so that the positioning ruler can pass through and move; at the same time, the inner radius of the ring of the elastic spacer is equal to the radius of the positioning ruler, so that the elastic spacer can appropriately provide friction for the positioning ruler, so that the positioning ruler will not slide randomly, and can appropriately clamp the positioning ruler, so that the positioning ruler remains vertical, thereby ensuring the accuracy of the reading of the positioning ruler. In the embodiment, the diameter of the middle of the limiting nut 4 is 10 mm greater than the diameter of the positioning ruler, and the inner radius of the ring of the elastic spacer is 5 mm smaller than the outer radius of the ring.

[0035] It should be noted that the diameter of the connecting hole of the connecting plate 2 is greater than the diameter of the middle of the limiting nut 4 or the common nut 1, but smaller than the outer diameter of the limiting nut 4 or the common nut 1; so that the connecting plate 2 can be welded with the limiting nut or the common nut, and the threaded rod of the positioning ruler or the embedded part can also pass through the connecting hole.

[0036] It should be noted that the outer ring of the limiting nut 4 is hexagonal or square. In this embodiment, the outer ring of the limiting nut 4 is hexagonal. The function of the limiting nut 4 is that by tightening it with a wrench, the hollow sleeve 3 can cause the ordinary nut 1 to separate from the embedded part 6.

[0037] like Figure 1 , Figure 2 As shown, the positioning ruler 5 is a cylindrical rod with graduations. The graduations on the rod gradually increase from top to bottom, with the top graduation being zero. The length of the positioning ruler 5 is equal to the total length of the hollow sleeve 3, connecting plate 2, ordinary nut 1, and limiting nut 4 connected together. This design is because when the threaded rod of the embedded part 6 is connected to the hollow sleeve 3 via the ordinary nut 1, the threaded rod of the embedded part 6 extends into the hollow sleeve 3. Then, the positioning ruler 5 is inserted from the top of the hollow sleeve 3, so that the bottom of the positioning ruler 5 contacts the top of the threaded rod of the embedded part 6. The graduation reading of the exposed part of the positioning ruler 5 represents the length of the threaded rod of the embedded part 6 extending into the protective device. The positioning ruler 5 allows for easy observation of the relative position between the embedded part 6 and the protective device, thus determining the length of the embedded part 6 within the protective device.

[0038] Understandably, before the foundation is poured, the embedded parts 6 are fixed at the designated positions in the foundation reinforcement cage. The anchorage length of the embedded parts 6 in the foundation and the length exposed outside the foundation both meet the design specifications.

[0039] In this embodiment, the main function of the protective device is to enclose the part of the embedded part 6 exposed on the foundation by using a common nut 1 and a hollow sleeve 3, so as to prevent this part of the embedded part 6 from being contaminated or damaged during the pouring process.

[0040] The protective device also extends the outward length of the embedded part 6. After the embedded part 6 is fixed to the steel cage, the installation status of the embedded part 6 can be determined by observing whether the protective devices of adjacent embedded parts 6 are tilted or aligned. In addition, since the embedded part 6 and the protective device are connected by ordinary nuts 1, the length of the embedded part 6 within the protective device is fixed. If the top height of the positioning ruler of the protective device of adjacent embedded parts 6 is inconsistent, it means that one of the embedded parts 6 has shifted in the vertical direction along with the protective device. If the above situation exists, the construction personnel can discover and adjust it in time.

[0041] The protective device also serves to ensure that when the embedded part 6 is installed in the correct position and the embedded part 6 is connected to the protective device, the bottom surface of the ordinary nut 1 at the bottom of the hollow sleeve 3 is at the same elevation as the foundation surface 7. This facilitates the finishing work during on-site pouring and prevents the pouring from exceeding the elevation.

[0042] Construction process:

[0043] First, the reinforcement cage of the foundation is bound, and the embedded part 6 is placed and fixed at multiple specified positions according to the design requirements, so that the anchoring length and the exposed length of the embedded part 6 meet the design requirements;

[0044] Next, the embedded part 6 is connected with the hollow sleeve 3 through the common nut 1, and the hollow sleeve 3 is screwed to make the threaded rod of the embedded part 6 extend into the inside of the hollow sleeve 3. In this process, the bottom of the hollow sleeve 3 is first placed in a general position; then the large-scale end of the positioning ruler 5 is inserted from the top of the hollow sleeve 3 until the positioning ruler 5 contacts the top of the embedded part 6, at which time the scale of the exposed part of the positioning ruler 5 is read to obtain the length of the embedded part 6 extending into the protection device;

[0045] Next, according to the comparison between the design exposed length of the embedded part 6 and the reading of the positioning ruler 5, the hollow sleeve 3 is rotated to fine-tune the relative position between the hollow sleeve 3 and the embedded part 6, and the length of the embedded part 6 inserted into the protection device is accurately adjusted.

[0046] Next, after all the embedded parts 6 are installed with the protection devices, it is checked whether all the protection devices are inclined, or whether adjacent protection devices are aligned, or whether the top heights of adjacent protection devices are consistent;

[0047] Next, after the check is correct, the concrete of the foundation is poured, and then the concrete is cured, and after the curing is completed, the protection device is rotated and removed. Since the hardened concrete may generate certain bonding and friction on the common nut at the bottom of the hollow sleeve 3, at this time, the limiting nut 4 at the top of the hollow sleeve 3 is clamped by a wrench to be removed. Since the hollow sleeve 3 has been lifted in height, the limiting nut 4 can generate greater torque at the bottom when force is applied, and is more easily removed. After the removal is completed, the length of the exposed part of the embedded part 6 is the length of the extended part of the positioning ruler 5 during construction.

[0048] Finally, the column is hoisted, the bolt hole of the column foot 8 is inserted into the extended part of the embedded part 6, and is fixed through the matching fixing nut, and the construction is completed.

[0049] Although the specific embodiments of the utility model are described in combination with the drawings, it is not a limitation on the protection scope of the utility model, and those skilled in the art should understand that various modifications or deformations made by those skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A protective device for pre-embedded bolts at column bases, characterized in that, It includes a hollow sleeve, with connecting plates fixedly installed on the top and bottom surfaces of the hollow sleeve, and a connecting hole in the center of the connecting plate; a common nut is fixedly welded to the bottom of the bottom connecting plate, and a limit nut is fixedly welded to the top of the top connecting plate. It also includes a positioning ruler, which passes through the hollow sleeve from the connecting plate on the top surface; the length of the positioning ruler is equal to the total length of the hollow sleeve, connecting plate, ordinary nut, and limit nut after they are connected.

2. The protective device for pre-embedded bolts at column bases as described in claim 1, characterized in that, The ordinary nut and the limiting nut have a hole in the middle. The diameter of the connecting hole in the connecting plate is larger than the diameter of the hole in the middle of the limiting nut or the ordinary nut, but smaller than the outer ring size of the limiting nut or the ordinary nut.

3. The protective device for pre-embedded bolts at column bases as described in claim 1, characterized in that, The positioning ruler is a cylindrical rod with graduations. The graduations on the rod gradually increase from top to bottom, with the graduation at the top of the rod being zero.

4. The protective device for pre-embedded bolts at column bases as described in claim 1, characterized in that, The center of the connecting plate on the bottom surface is used to pass through the embedded part; the top of the embedded part and the bottom of the positioning ruler are in contact inside the hollow sleeve.

5. The protective device for pre-embedded bolts at column bases as described in claim 4, characterized in that, The embedded part is embedded in the foundation reinforcement cage to be poured, and the threaded rod of the embedded part protrudes a length from the foundation surface to connect the column base.

6. The protective device for pre-embedded bolts at column bases as described in claim 4, characterized in that, The ordinary nut has an internal thread in the middle hole, and the specification of the internal thread is the same as the specification of the external thread of the threaded rod of the embedded part.

7. The protective device for pre-embedded bolts at column bases as described in claim 1, characterized in that, The connecting plate is a steel plate with the same size as the cross-section of the hollow sleeve.

8. The protective device for pre-embedded bolts at column bases as described in claim 1, characterized in that, The limiting nut has no threads in the middle opening, and an elastic spacer is provided in the middle opening.

9. The protective device for pre-embedded bolts at column bases as described in claim 8, characterized in that, The inner radius of the elastic partition is equal to the radius of the positioning ruler.

10. The protective device for pre-embedded bolts at column bases as described in claim 1, characterized in that, The outer ring of the limiting nut is hexagonal or square.

Images