Positioning device for embedded anchor bolt in cast-in-place concrete foundation

Abstract

The utility model discloses a cast-in-situ concrete foundation preburied foot bolt's positioning device, has realized the accurate positioning of preburied foot bolt of volume bigger and butt joint precision requirement higher, be provided with upper crossbeam through -hole (5) on the upper crossbeam (3) of rectangular box type frame (1), and the threaded connection has T shape adjusting nut disc (8) on preburied bolt (2), and preburied bolt (2) is movably connected between sleeve (7) and lower crossbeam through -hole (6), and the upper portion of preburied bolt is movably overlapped on the top end of sleeve through the step of T shape adjusting nut disc (8), and the outer side vertical surface of the upper step cylinder of T shape adjusting nut disc (8) is provided with the positioning hole (9) at interval, and the top end surface of upper crossbeam (3) on both sides of upper crossbeam through -hole is provided with a top rod support seat (10) evenly, and the horizontal top rod (13) is movably arranged in the horizontal through -hole (11) where the top rod passes, and the inner side end of horizontal top rod is movably contacted in the positioning hole (9).

Description

Technical Field

[0001] This utility model relates to a pre-embedded bolt in a cast-in-place concrete foundation, and particularly to a pre-embedded anchor bolt positioning device for a cast-in-place concrete foundation. Background Technology

[0002] An embedded bolt is a bolt pre-embedded in a cast-in-place concrete structure. It is mainly used to fix equipment, steel structures, supports, and other components. By pre-embedding the bolt in the concrete, it becomes a connecting component for the structure on the concrete foundation after the concrete has solidified, providing a reliable connection point. Therefore, the position of the embedded bolt is very important and directly affects the smooth connection with the equipment. Especially for the embedded anchor bolts for connecting large equipment, these bolts are large in size and require high precision in connection with the equipment. How to achieve the pre-embedding positioning of these bolts during concrete pouring has become a difficult problem to be solved on site. Summary of the Invention

[0003] This utility model provides a positioning device for pre-embedded anchor bolts in cast-in-place concrete foundations, which realizes the precise positioning of pre-embedded anchor bolts that are large in size and have high requirements for docking accuracy.

[0004] This utility model solves the above technical problems through the following technical solution:

[0005] A positioning device for pre-embedded anchor bolts in cast-in-place concrete foundations includes a rectangular box frame and pre-embedded bolts. An upper crossbeam through hole is provided on the upper crossbeam of the rectangular box frame, and a lower crossbeam through hole is provided on the lower crossbeam of the rectangular box frame. The upper and lower crossbeam through holes are vertically aligned. A sleeve is fixedly installed in the upper crossbeam through hole. A T-shaped adjusting nut is screwed onto the pre-embedded bolt. The pre-embedded bolt movably passes between the sleeve and the lower crossbeam through hole. Furthermore, the upper part of the pre-embedded bolt movably overlaps the sleeve via the step of the T-shaped adjusting nut. On the top port; positioning holes are provided at equal intervals on the outer surface of the upper stepped cylinder of the T-shaped adjusting nut disc; a top rod support seat is provided on the top surface of the upper crossbeam on both sides of the upper crossbeam through hole; a top rod is provided on the top rod support seat and passes through the horizontal through hole; a horizontal top rod is movably installed in the horizontal through hole; the inner end of the horizontal top rod is movably abutted in the positioning hole; a tension spring is sleeved on the horizontal top rod outside the top rod support seat; the inner end of the tension spring is connected to the top rod support seat; and the outer end of the tension spring is connected to the cup-shaped head outside the horizontal top rod.

[0006] The lower part of the pre-embedded bolt passing through the through hole of the lower crossbeam is provided with a lower external thread, and a lock nut is connected to the lower part of the pre-embedded bolt. The lock nut is located above the lower crossbeam.

[0007] Pre-embedded bolts in the vertical direction are provided at the four corners of the top surface of the rectangular box frame.

[0008] This invention uses a prefabricated rectangular box frame as the positioning base for a set of pre-embedded positioning bolts. The pre-embedded bolts are supported by corresponding through holes on the upper and lower crossbeams of the box frame. The spacing between adjacent pre-embedded bolts is determined by the spacing between adjacent through holes. The connection position between the T-shaped adjusting nut and the pre-embedded bolt is adjusted by the threaded connection and rotation. The height of the pre-embedded bolts is precisely adjusted by the cooperation between the T-shaped adjusting nut and the sleeve fixed in the through hole of the upper crossbeam. The entire rectangular box frame is positioned in the cast-in-place concrete foundation pit, providing stable positioning and resistance to concrete impact. Attached Figure Description

[0009] Figure 1 is a structural schematic diagram of this utility model;

[0010] Figure 2 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0011] Figure 3 yes Figure 1 Enlarged view of section B in the middle. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings:

[0013] A positioning device for pre-embedded anchor bolts in a cast-in-place concrete foundation includes a rectangular box frame 1 and pre-embedded bolts 2. An upper crossbeam through hole 5 is provided on the upper crossbeam 3 of the rectangular box frame 1, and a lower crossbeam through hole 6 is provided on the lower crossbeam 4 of the rectangular box frame 1. The upper and lower crossbeam through holes 5 and 6 are vertically aligned. A sleeve 7 is fixedly installed in the upper crossbeam through hole 5. A T-shaped adjusting nut disc 8 is screwed onto the pre-embedded bolt 2. The T-shaped adjusting nut disc 8 is shaped like two cylinders, larger at the top and smaller at the bottom. Positioning holes 9 are evenly spaced on the outer arc-shaped surface of the upper cylinder. The pre-embedded bolt 2 is movably inserted between the sleeve 7 and the lower crossbeam through hole 6. Furthermore, the upper part of the pre-embedded bolt 2 is movably connected to the top end of the sleeve 7 via the step of the T-shaped adjusting nut disc 8. The pre-embedded bolt 2 is vertically positioned along the vertical direction. The tops of the upper crossbeam 3 on both sides of the upper crossbeam through hole 5 are also present. Each surface is provided with a top rod support seat 10. A top rod passes through a horizontal through hole 11 on the top rod support seat 10. A horizontal top rod 13 is movably installed in the horizontal through hole 11. The inner end of the horizontal top rod 13 is movably abutted in the positioning hole 9. A tension spring 12 is sleeved on the horizontal top rod 13 outside the top rod support seat 10. The inner end of the tension spring 12 is connected to the top rod support seat 10, and the outer end of the tension spring 12 is connected to the cup-shaped head outside the horizontal top rod 13. When the cup-shaped head outside the horizontal top rod 13 is pulled outward horizontally, the inner end of the horizontal top rod 13 is disengaged from the positioning hole 9. After the hand is released, the horizontal top rod 13 moves inward under the action of the tension spring 12, so that the inner end of the horizontal top rod 13 enters the positioning hole 9, realizing the positioning and locking of the pre-embedded screw in the vertical direction. The left and right sets of horizontal top rod 13 mechanisms realize the positioning and locking of the horizontal top rod 13.

[0014] The lower part of the pre-embedded bolt 2, which passes through the through hole 6 of the lower crossbeam, is provided with a lower external thread. A locking nut 14 is connected to the lower part of the pre-embedded bolt 2 and is located above the lower crossbeam 4. By rotating the locking nut 14, the lower bottom surface of the locking nut 14 is brought into contact with the top surface of the lower crossbeam 4, thereby further fixing the pre-embedded bolt 2.

[0015] Pre-embedded bolts 2 are provided at the four corners of the top surface of the rectangular box frame 1 in the vertical direction; they can also be arranged on the rectangular box frame (1) according to the number and position of the pre-embedded bolts; by setting an adjustment device, it is convenient to adjust the height of the pre-embedded bracket as a whole, so that the height of the pre-embedded bracket can be quickly adjusted and fixed according to the pouring requirements during concrete pouring. To this end, pull the drag block, the positioning rod is successively disengaged from the positioning hole, and the return spring is simultaneously deformed and expanded. At this time, the adjustment plate is in a loose state. Then rotate the adjustment plate to generate thread transmission with the pre-embedded bolt body, and the pre-embedded bracket is lifted by force. When the pre-embedded bracket reaches the position where the pre-embedded bolt body needs to be fixed, release the drag block, the return spring rebounds after losing its restraint, and the positioning rod is successively inserted into the inner wall of the positioning hole to fix the adjustment plate. By setting an adjustment device, the connection point between the pre-embedded bracket and the pre-embedded bolt body is further fixed, which effectively improves the usability of the pre-embedded bracket.

Claims

1. A positioning device for pre-embedded anchor bolts in cast-in-place concrete foundations, comprising a rectangular box frame (1) and pre-embedded bolts (2); characterized in that, An upper crossbeam through hole (5) is provided on the upper crossbeam (3) of the rectangular box frame (1), and a lower crossbeam through hole (6) is provided on the lower crossbeam (4) of the rectangular box frame (1). The upper crossbeam through hole (5) and the lower crossbeam through hole (6) are provided vertically. A sleeve (7) is fixedly installed in the upper crossbeam through hole (5). A T-shaped adjusting nut disc (8) is screwed onto the pre-embedded bolt (2). The pre-embedded bolt (2) is movably connected between the sleeve (7) and the lower crossbeam through hole (6). Furthermore, the upper part of the pre-embedded bolt (2) is movably connected to the top end of the sleeve (7) through the step of the T-shaped adjusting nut disc (8). The upper step of the T-shaped adjusting nut disc (8) is cylindrical. Positioning holes (9) are provided at equal intervals on the outer facade. A top rod support seat (10) is provided on the top surface of the upper beam (3) on both sides of the upper beam through hole (5). A top rod passes through a horizontal through hole (11) on the top rod support seat (10). A horizontal top rod (13) is movably provided in the horizontal through hole (11). The inner end of the horizontal top rod (13) is movably abutted in the positioning hole (9). A tension spring (12) is sleeved on the horizontal top rod (13) outside the top rod support seat (10). The inner end of the tension spring (12) is connected to the top rod support seat (10), and the outer end of the tension spring (12) is connected to the bowl-shaped head outside the horizontal top rod (13).

2. A device for positioning a foundation bolt in a cast-in-place concrete foundation according to claim 1, characterized in that The lower part of the pre-embedded bolt (2) passing through the through hole (6) of the lower crossbeam is provided with a lower external thread, and a locking nut (14) is connected to the lower part of the pre-embedded bolt (2). The locking nut (14) is located above the lower crossbeam (4).

3. A device for positioning a foundation bolt in a cast-in-place concrete foundation according to claim 1 or 2, characterized in that Pre-embedded bolts (2) are installed at the four corners of the top surface of the rectangular box frame (1) along the vertical direction.

Images