Cracked concrete repeated opening and closing anti-displacement anchor bolt

Abstract

The utility model discloses a cracking concrete repeated opening and closing anti-displacement anchor bolt which comprises a threaded column, a nut is installed outside the threaded column in a threaded mode, a guide sleeve is movably sleeved outside the threaded column, an expansion sleeve is fixedly connected to the lower end of the guide sleeve, a gasket is movably sleeved outside the threaded column, and an elastic piece is arranged inside the guide sleeve. The lower end of the elastic piece is fixedly connected with the guide sleeve, and the lower end of the threaded column is fixedly connected with an extrusion column. The threaded column comprises a threaded column body, the elastic piece is extruded between the threaded column and the hole wall, friction force between the device and the hole is increased, the device is fixed in the hole in advance, then the threaded column is fixed through a spanner, the nut is rotated through another spanner, the guide sleeve is extruded downwards through the nut, the guide sleeve acts downwards on the expansion sleeve, and the expansion sleeve is fixed. The lower portion of the expansion sleeve is expanded by the extrusion column, so that the expansion sleeve is pressed and fixed in the hole, the device is prevented from falling off through an elastic piece pre-installation mode, and installation operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of concrete anchor bolt technology, and particularly relates to a cracked concrete repeated opening and closing anti-displacement anchor bolt. Background Technology

[0002] Concrete anchors can firmly connect structural components made of different materials, such as steel and wood, to a concrete substrate. For example, in the construction of industrial plants, concrete anchors are used to connect steel structural components such as steel beams and columns to the concrete foundation, making the entire structure a stable whole that shares the load.

[0003] When the hole is below the concrete, after inserting the anchor bolt, the anchor bolt will fall directly out of the hole after both hands are removed. In the early stages of the operation, the hands need to hold the anchor bolt continuously until it is pre-fixed in the concrete insertion hole before intermittently tightening it, which makes the conventional anchor bolt installation operation quite troublesome.

[0004] To address this issue, we propose a cracked concrete repeated opening and closing anti-displacement anchor bolt. Utility Model Content

[0005] The purpose of this invention is to solve the problem of the cumbersome installation operation of conventional anchor bolts, and to propose a cracked concrete repeated opening and closing anti-displacement anchor bolt.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cracked concrete repetitive opening and closing anti-displacement anchor bolt includes a threaded post, a nut installed on the external thread of the threaded post, a guide sleeve movably fitted on the external side of the threaded post, an expansion sleeve fixedly connected to the lower end of the guide sleeve, a washer movably fitted on the external side of the threaded post, a spring piece provided inside the guide sleeve, the lower end of the spring piece fixedly connected to the guide sleeve, and a compression post fixedly connected to the lower end of the threaded post. The guide sleeve, compression post, and expansion sleeve are inserted into a hole in the target concrete, causing the hole wall to act on the spring piece. The spring piece compresses the threaded post between the threaded post and the hole wall, increasing the friction between the device and the hole, thus pre-fixing the device in the hole. Then, a wrench is used to fix the threaded post, and another wrench is used to rotate the nut, causing the nut to compress the guide sleeve downwards. This causes the guide sleeve to act downwards on the expansion sleeve, causing the lower part of the expansion sleeve to be opened by the compression post, thereby pressing and fixing the expansion sleeve in the hole. The pre-installation of the spring piece prevents the device from falling out and facilitates installation.

[0008] Preferably, the threaded post includes a threaded post body, and a fixing button is fixedly connected to the upper end of the threaded post body. When a wrench is placed on the fixing button, the fixing button acts on the threaded post body to prevent rotation, thus facilitating the fixing of the threaded post body and preventing rotation.

[0009] Preferably, the extrusion column includes a column body, the upper end of which is fixedly connected to the lower end of a threaded column body, and anti-rotation grooves are formed on the outside of the column body. The anti-rotation grooves increase the rotational resistance of the extrusion column. After the anti-rotation grooves compress the expansion sleeve, a single wrench can be used to directly tighten the nut, further reducing installation difficulty.

[0010] Preferably, the expansion sleeve includes a connecting ring, which is fixedly connected to the lower end of the guide sleeve. The connecting ring is movably sleeved on the threaded cylinder, and expansion plates are uniformly fixedly connected to the lower end of the connecting ring. When the connecting ring is subjected to pressure from the guide sleeve, it pushes the expansion plates downward, and the anti-rotation groove guides the expansion plates to expand outward, so that the expansion plates press between the hole and the anti-rotation groove, facilitating the fixing of the device into the target concrete hole.

[0011] Preferably, the expansion plate has an annular groove on its outer surface. The annular groove increases the friction between the expansion plate and the hole, thereby improving the stability after curing.

[0012] Preferably, the spring includes a sheet body, and a guide plate is fixedly connected to the upper end of the sheet body. When the sheet body is pressed into the concrete hole, the guide plate presses against the threaded cylinder, increasing the rotational resistance of the threaded cylinder and reducing the synchronous rotational resistance between the threaded cylinder and the nut.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] 1. Insert the guide sleeve, extrusion column, and expansion sleeve into the hole in the target concrete. The hole wall acts on the spring clip, which presses against the threaded column and the hole wall, increasing the friction between the device and the hole. This pre-fixes the device in the hole. Then, use one wrench to fix the threaded column and another wrench to rotate the nut. The nut presses the guide sleeve downward, causing it to act downward on the expansion sleeve. The lower part of the expansion sleeve is then spread open by the extrusion column, thus pressing and fixing the expansion sleeve in the hole. The pre-installation of the spring clip prevents the device from falling and facilitates installation.

[0015] 2. Place the wrench on the fixing button. The fixing button acts on the threaded cylinder to prevent the threaded cylinder from rotating, making it easy to fix the threaded cylinder and prevent it from rotating.

[0016] 3. The anti-rotation groove increases the rotation resistance of the extrusion column. After the anti-rotation groove tightens the expansion sleeve, a single wrench can be used to directly tighten the nut, further reducing the installation difficulty.

[0017] 4. When the connecting ring is subjected to the pressure of the guide sleeve, the connecting ring pushes the expansion plate downward. The anti-rotation pattern guides the expansion plate to expand outward, so that the expansion plate is pressed between the hole and the anti-rotation pattern, making it easy to fix the device in the target concrete hole. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the threaded column structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the extrusion column structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the expansion sleeve structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the spring sheet structure of this utility model.

[0023] In the diagram: 1. Guide sleeve; 2. Threaded column; 3. Extrusion column; 4. Expansion sleeve; 5. Spring; 6. Nut; 7. Washer; 21. Threaded column body; 22. Fixing button; 31. Column body; 32. Anti-rotation groove; 41. Connecting ring; 42. Expansion plate; 43. Annular groove; 51. Plate body; 52. Guide plate. Detailed Implementation

[0024] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.

[0025] like Figure 1 As shown, a cracked concrete repeatedly opening and closing anti-displacement anchor bolt includes a threaded post 2, a nut 6 installed on the external thread of the threaded post 2, a guide sleeve 1 movably sleeved on the outside of the threaded post 2, an expansion sleeve 4 fixedly connected to the lower end of the guide sleeve 1, a washer 7 movably sleeved on the outside of the threaded post 2, a spring piece 5 provided inside the guide sleeve 1, the lower end of the spring piece 5 fixedly connected to the guide sleeve 1, and a compression post 3 fixedly connected to the lower end of the threaded post 2.

[0026] like Figure 1 and 2 As shown, the threaded column 2 includes a threaded column body 21, and a fixing button 22 is fixedly connected to the upper end of the threaded column body 21. When a wrench is placed on the fixing button 22, the fixing button 22 acts on the threaded column body 21 to prevent the threaded column body 21 from rotating.

[0027] like Figure 1 and 3 As shown, the extrusion column 3 includes a column body 31, the upper end of which is fixedly connected to the lower end of the threaded column body 21. The outer side of the column body 31 is provided with anti-rotation grooves 32. The anti-rotation grooves 32 are used to increase the rotation resistance of the extrusion column 3. After the anti-rotation grooves 32 press the expansion sleeve 4, the nut 6 can be directly tightened with a wrench.

[0028] like Figure 1 , 2As shown in Figure 4, the expansion sleeve 4 includes a connecting ring 41, which is fixedly connected to the lower end of the guide sleeve 1. The connecting ring 41 is movably sleeved on the outside of the threaded cylinder 21, and expansion plates 42 are uniformly fixedly connected to the lower end of the connecting ring 41. When the connecting ring 41 is subjected to pressure from the guide sleeve 1, the connecting ring 41 pushes the expansion plates 42 downward, and the anti-rotation groove 32 guides the expansion plates 42 to expand outward, so that the expansion plates 42 are pressed between the hole and the anti-rotation groove 32.

[0029] like Figure 4 As shown, an annular groove 43 is formed on the outer side of the expansion plate 42. The annular groove 43 is used to increase the friction between the expansion plate 42 and the hole.

[0030] like Figure 1 and 5 As shown, the spring 5 includes a plate body 51, and a guide plate 52 is fixedly connected to the upper end of the plate body 51. When the plate body 51 is pressed into the concrete hole, the guide plate 52 is pressed against the outside of the threaded column 21, increasing the rotational resistance of the threaded column 21.

[0031] Working principle: Insert the guide sleeve 1, extrusion column 3, and expansion sleeve 4 into the hole of the target concrete, so that the hole wall acts on the spring piece 5. The spring piece 5 is pressed between the threaded column 2 and the hole wall, increasing the friction between the device and the hole, so that the device is pre-fixed in the hole. Then, use one wrench to fix the threaded column 2, and use another wrench to rotate the nut 6. The nut 6 presses the guide sleeve 1 downward, so that the guide sleeve 1 acts downward on the expansion sleeve 4, so that the lower part of the expansion sleeve 4 is opened by the extrusion column 3, thereby pressing and fixing the expansion sleeve 4 in the hole. The pre-installation of the spring piece 5 prevents the device from falling off before installation.

[0032] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.

[0033] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.

Claims

1. A cyclically opening and closing displacement resistant anchor for cracked concrete, characterized by: The utility model provides a threaded column (2), the nut (6) is installed to the outside thread of threaded column (2), the guide sleeve (1) is sleeved to the outside of threaded column (2), the lower end fixed connection of guide sleeve (1) has expansion sleeve (4), the gasket (7) is sleeved to the outside of threaded column (2), the inside of guide sleeve (1) is equipped with elastic sheet (5), the lower end of elastic sheet (5) is fixedly connected with guide sleeve (1), the lower end fixed connection of threaded column (2) has extrusion column (3).

2. A cyclically openable displacement-resistant anchor for cracked concrete according to claim 1, characterized in that: The threaded column (2) comprises a threaded column body (21), and the upper end of the threaded column body (21) is fixedly connected with a fixed knob (22).

3. A cyclically loadable displacement-resistant anchorage for cracking concrete according to claim 2, characterized in that: The extrusion column (3) comprises a column body (31), the upper end of the column body (31) is fixedly connected with the lower end of the threaded column body (21), and the outer portion of the column body (31) is provided with an anti-rotation thread (32).

4. A cyclically openable displacement-resistant anchor for cracked concrete according to claim 2, wherein: The expansion sleeve (4) comprises a connecting ring (41), the connecting ring (41) is fixedly connected with the lower end of the guide sleeve (1), the connecting ring (41) is sleeved outside the threaded column body (21), and the lower end of the connecting ring (41) is uniformly fixedly connected with expansion sheets (42).

5. A cyclically loadable displacement-resistant anchorage for cracking concrete according to claim 4, characterized in that: The outer portion of the expansion sheet (42) is provided with an annular groove (43).

6. A cyclically loadable displacement-resistant anchorage for cracking concrete according to claim 1, characterized in that: The elastic sheet (5) comprises a sheet body (51), and the upper end of the sheet body (51) is fixedly connected with a guide sheet (52).

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