Embedded bolt for fixing bottom of cast-in-place concrete outer wall formwork
By designing the fixed embedded bolts at the bottom of the cast-in-place concrete exterior wall formwork with split structures, the problems of difficulty in using and inability to recycle embedded bolts in the prior art are solved, and the effect of easy disassembly and material recycling is achieved.
Patent Information
- Application Number
- CN202421414324.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-19
AI Technical Summary
In existing construction projects, embedded bolts are difficult to use during construction, and they need to be cut after demolition, which wastes resources and cannot be recycled.
Design a cast-in-place concrete exterior wall formwork fixed embedded bolts at the bottom, adopting a split structure, including right-angle bolts, bolt connectors and pull screws. The bolt connectors have built-in nuts and a round table-shaped shell for easy disassembly and recycling.
It realizes the convenience of disassembly of embedded bolts. After the construction is completed, the pulling bolts and connectors can be removed, recycled, saved materials, and simplified construction technology.
Smart Images
Figure CN222632828U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an embedded bolt for construction engineering, in particular to an embedded bolt for fixing the bottom of a cast-in-place concrete exterior wall template. Background Art
[0002] During the construction of the concrete exterior wall of a building, in order to prevent the upper and lower exterior walls from being misaligned, tension bolts are generally embedded at the top position during the construction of the lower wall. After the concrete construction of the lower wall is completed, when the upper exterior wall is constructed, the formwork will extend downward 200-300mm. The position of the embedded bolts in the lower wall construction is used as the fixed end of the formwork, and the formwork is fixed with nuts. After the concrete is poured and cured, the formwork is removed and the embedded bolts are cut and removed.
[0003] In view of this widespread operation situation, embedded bolts are generally installed during the construction process of reinforced concrete exterior wall formwork system. They are not free to use and are difficult to install and remove during use. After the formwork is removed, cutting operations are required when carrying out the next process, which wastes resources and cannot be recycled. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a pre-embedded bolt for fixing the bottom of a cast-in-place concrete exterior wall template, which is easy to disassemble. After the construction is completed, the tension bolts and connecting parts can be removed and recycled, with good effect.
[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is to provide a pre-embedded bolt for fixing the bottom of a cast-in-place concrete exterior wall formwork, including a right-angle bolt, a bolt connector and a tension screw, the bolt connector including a built-in nut and a truncated cone-shaped shell, the truncated cone-shaped shell being arranged outside the built-in nut, the tension bolt and the right-angle bolt can be connected through the built-in nut, and the tension bolt is located on the large circular end side of the truncated cone-shaped shell; a nut placement channel is arranged at the center of the truncated cone-shaped shell along the axial direction, a nut stopper is arranged at the small circular end of the truncated cone-shaped shell corresponding to the nut placement channel, a tool groove is arranged at the large circular end of the truncated cone-shaped shell, and the built-in nut is placed in the nut placement channel; the length of the truncated cone-shaped shell is greater than the length of the built-in nut, and the length dimension of the built-in nut is greater than the distance dimension from the inner surface of the nut stopper to the bottom surface of the tool groove and is smaller than the distance dimension from the inner surface of the nut stopper to the large circular end surface of the truncated cone-shaped shell.
[0006] Furthermore, the built-in nut is pentagonal in shape and has a circular outer flange, and the circular outer flange is inserted and connected to the truncated cone-shaped shell.
[0007] Furthermore, the nut stopper is a pentagonal annular stopper perpendicular to the axis of the nut placement channel, and a T-bolt through hole is provided on the nut stopper.
[0008] Furthermore, the tool groove is an annular groove opened along the circumference of the nut placement channel.
[0009] Furthermore, there is a transition fit between the nut placement channel and the built-in nut.
[0010] Furthermore, a release agent layer is coated on the outer surface of the truncated cone-shaped shell before embedding.
[0011] Furthermore, the truncated cone-shaped housing is made of hard plastic.
[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a cast-in-place concrete exterior wall formwork bottom fixed embedded bolts, a split structure design, and the right-angle bolts are embedded. After the construction is completed, the tension bolts and connecting parts are removed and recycled; the embedded bolts of the utility model are simple to operate, save time and labor, and have good effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the structure of the embedded bolts for fixing the bottom of the cast-in-place concrete exterior wall formwork of the utility model;
[0014] Figure 2 This is a schematic diagram of the exploded structure of the embedded bolts for fixing the bottom of the cast-in-place concrete exterior wall formwork of the utility model;
[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the round end of the bolt connector of the embedded bolt of the utility model;
[0016] Figure 4 It is a schematic diagram of the longitudinal cross-sectional structure of the round end of the bolt connector of the embedded bolt of the utility model;
[0017] Figure 5 This is a schematic diagram of the utility model of pouring the pre-embedded bolts for fixing the bottom of the cast-in-place concrete exterior wall formwork into the concrete;
[0018] Figure 6 It is a schematic diagram of the use stages of the embedded bolts for fixing the bottom of the cast-in-place concrete exterior wall formwork of the utility model.
[0019] The markings in the figure are:
[0020] 1. Right-angle bolts, 2. Bolt connectors, 3. Nut placement channels, 4. Nut stoppers, 5. Tool grooves, 6. Cone-shaped housings, 7. Built-in nuts, 8. Circular outer flanges, 9. Wooden squares, 10. Tension screws, 11. Exterior wall formwork, 12. Exterior wall concrete. DETAILED DESCRIPTION
[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0022] Figure 1 This is a schematic diagram of the structure of the embedded bolts for fixing the bottom of the cast-in-place concrete exterior wall formwork of the utility model; Figure 2 This is a schematic diagram of the exploded structure of the embedded bolts for fixing the bottom of the cast-in-place concrete exterior wall formwork of the utility model.
[0023] See also Figure 1 and Figure 2 The utility model provides a pre-embedded bolt for fixing the bottom of a cast-in-place concrete exterior wall formwork, comprising a right-angle bolt 1, a bolt connector 2, and a tension screw 10; the bolt connector 2 comprises a built-in nut 7 and a truncated cone-shaped shell 6 arranged outside the built-in nut 7, and the truncated cone-shaped shell 6 is made of hard plastic to ensure sufficient strength and provide a stable space for the built-in nut 7. The length of the truncated cone-shaped shell 6 is greater than the length of the built-in nut 7, and a nut placement channel 3 is arranged at the center of the truncated cone-shaped shell 6 along the axial direction, and a nut stopper 4 is arranged at the small round end of the truncated cone-shaped shell 6 corresponding to the nut placement channel 3, and the nut stopper 4 is an annular stopper perpendicular to the axis of the nut placement channel 3, and the nut stopper 4 is provided with a T-bolt through hole. A tool groove 5 is arranged at the large round end of the truncated cone-shaped shell 6, and the tool groove 5 is an annular groove further opened circumferentially on the basis of the nut placement channel 3.
[0024] The built-in nut 7 is placed in the nut placement channel 3, and its length dimension is greater than the distance dimension from the inner surface of the nut stopper 4 to the bottom surface of the tool groove 5 and less than the distance dimension from the inner surface of the nut stopper 4 to the large circular end surface of the truncated cone-shaped shell 6. When in use, the large circular end surface of the truncated cone-shaped shell 6 is pressed against the external wall template 11.
[0025] The truncated cone-shaped shell 6 wraps the cylindrical surface of the built-in nut 7 and the connecting end of the right-angle bolt 1 to isolate the built-in nut 7 from the wall concrete. The large round end of the bolt connector 2 fits into the exterior wall template 11 as the template end. The annular tool groove 5 set between the built-in nut 7 at the template end and the truncated cone-shaped shell 6 facilitates the unscrewing of the built-in nut 7 and the truncated cone-shaped shell 6 after use (the truncated cone-shaped shell 6 is coated with a release agent layer before embedding to isolate it from the concrete and facilitate unscrewing).
[0026] Preferably, the built-in nut 7 is pentagonal in shape, has a circular outer flange 8, is inserted and connected with the truncated cone-shaped housing 6, is not easy to slide out and move left and right, and has good stability; Figure 3 and Figure 4 shown.
[0027] The utility model provides a cast-in-place concrete exterior wall template with embedded bolts at the bottom, which is easy to disassemble and has a split structure design. The right-angle bolts are embedded. After the construction is completed, the tension bolts and the truncated cone-shaped connectors are removed and recycled. Figure 5 and Figure 6 As shown:
[0028] During the construction of the lower exterior wall concrete, right-angle bolts 1 are screwed into both sides of the truncated cone shell for pre-embedding; after the lower layer is constructed, the external right-angle bolts 1 are screwed out and the formwork is removed; during the construction of the upper exterior wall, the tension bolts 10 are connected to the right-angle bolts 1 through the built-in nuts 7, the tension bolts 10 are located on the large round end side of the truncated cone shell 6, and the right-angle bolts 1 are located on the small round end side of the truncated cone shell 6. After the construction is completed, the tension bolts 10 are screwed out, and the built-in nuts 7 and the truncated cone shell 6 are screwed out together, and the right-angle bolts 1 at the small round end are pre-embedded bolts left in the exterior wall concrete 12.
[0029] The nut placement hole 3 and the built-in nut 7 adopt a transition fit, so that the built-in nut 7 is not easy to slide out of the nut placement hole 3, and is easy to separate from the nut placement hole 3.
[0030] During the construction of the concrete exterior wall, after the concrete construction and maintenance of the lower exterior wall is completed, the external right-angle bolts 1 are removed and the lower formwork is removed; during the construction of the upper wall, the upper exterior wall formwork 11 is extended downward by a certain dimension, the tension bolts 10 are screwed into the bolt connector 2, and the upper formwork is fixed with fasteners; after the construction of the upper wall is completed and the formwork is removed, the tension bolts 10 are unscrewed, and the bolt connector 2 is unscrewed with a socket wrench, and the right-angle bolts 1 buried in the concrete remain in the wall, and then the holes are filled, and the holes are relatively regular and easy to repair.
[0031] In summary, the utility model provides a cast-in-place concrete exterior wall template bottom fixing embedded bolts, which has the following beneficial effects:
[0032] When the lower wall construction is completed, the external right-angle bolts 1 can be unscrewed, and the tension bolts 10 can be screwed in to fix the upper outer wall template to ensure that the upper and lower walls are vertically aligned, thereby improving the construction quality and ensuring safety. At the same time, the tension bolts 10 and the bolt connectors 2 can be unscrewed after the construction is completed, and can be repeatedly used to save materials.
[0033] After the construction is completed, the hole after the bolt connector 2 is screwed out of the wall is regular and easy to repair;
[0034] The split structure design is simple to operate and easy to use, which simplifies the construction process and saves manpower.
[0035] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.
Claims
1. A pre-embedded bolt for fixing the bottom of a cast-in-place concrete exterior wall formwork, characterized in that: The invention comprises a right-angle bolt (1), a bolt connector (2) and a tension screw rod (10), wherein the bolt connector (2) comprises a built-in nut (7) and a truncated cone-shaped shell (6), wherein the truncated cone-shaped shell (6) is arranged outside the built-in nut (7), the tension screw rod (10) and the right-angle bolt (1) can be connected via the built-in nut (7), and the tension screw rod (10) is located on the large round end side of the truncated cone-shaped shell (6); a nut placement hole (3) is arranged at the center of the truncated cone-shaped shell (6) along the axial direction, and a small hole (3) is arranged at the center of the truncated cone-shaped shell (6) A nut stopper (4) is provided at the round end corresponding to the nut placement channel (3), a tool groove (5) is provided at the large round end of the truncated cone-shaped shell (6), and the built-in nut (7) is placed in the nut placement channel (3); the length of the truncated cone-shaped shell (6) is greater than the length of the built-in nut (7), and the length of the built-in nut (7) is greater than the distance from the inner surface of the nut stopper (4) to the bottom surface of the tool groove (5) and less than the distance from the inner surface of the nut stopper (4) to the large round end surface of the truncated cone-shaped shell (6).
2. The cast-in-place concrete exterior wall formwork bottom fixing embedded bolts as claimed in claim 1, characterized in that: The built-in nut (7) is pentagonal and has a circular outer flange (8), and the circular outer flange (8) is inserted and connected with the truncated cone-shaped housing (6).
3. The cast-in-place concrete exterior wall formwork bottom fixing embedded bolts as claimed in claim 1, characterized in that: The nut stopper (4) is a pentagonal annular stopper perpendicular to the axis of the nut placement channel (3), and a T-shaped bolt through hole is provided on the nut stopper (4).
4. The cast-in-place concrete exterior wall formwork bottom fixing embedded bolts as claimed in claim 1, characterized in that: The tool groove (5) is an annular groove opened along the circumference of the nut placement channel (3).
5. The cast-in-place concrete exterior wall formwork bottom fixing embedded bolts as claimed in claim 1, characterized in that: The nut placement hole (3) and the built-in nut (7) are in transitional fit.
6. The cast-in-place concrete exterior wall formwork bottom fixing embedded bolts as claimed in claim 1, characterized in that: The outer surface of the truncated cone-shaped housing (6) is coated with a release agent layer before embedding.
7. The cast-in-place concrete exterior wall formwork bottom fixing embedded bolts as claimed in claim 1, characterized in that: The material of the truncated cone-shaped housing (6) is hard plastic.