A building formwork connecting steel frame for civil engineering
By using a nine-grid structure for the template and innovative connection methods such as butterfly buckles, nuts, and bolts, the problems of complex installation and loosening of existing building formwork steel frames are solved, enabling rapid installation and stable fixing, thus improving construction efficiency and the stability of the template.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN INST OF PETROLEUM
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
The existing civil engineering construction formwork connection steel frame installation steps are cumbersome, complicated, slow to build, and prone to loosening after fixing, resulting in formwork deformation and grout leakage.
The template adopts a nine-square grid structure on the outside, with through-wire rods passing through through the wire holes. Combined with butterfly buckles, nuts and bolts, the template can be quickly installed and firmly fixed through the external corner connecting plates and fixing plates, which can offset the external forces of concrete vibration and load changes.
It simplifies the installation process, improves construction efficiency, reduces the risk of formwork loosening and grout leakage, and ensures the stability and shape integrity of the formwork.
Smart Images

Figure CN224532242U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, specifically to a steel frame for connecting building formwork in civil engineering. Background Technology
[0002] Civil engineering formwork is a temporary support structure used for shaping concrete during the pouring of building structures. Its core function is to ensure that the concrete is shaped, sized, and positioned according to the design. Connecting steel frames are used to connect the formwork. Since the formwork and connecting steel frames are used repeatedly in the construction process, they must be able to be rotated and disassembled.
[0003] The existing construction formwork for civil engineering involves complicated steps, numerous installation components, complex operation for construction personnel, slow construction speed, and easy delays in the construction period. After fixing, the connection parts are easily loosened due to the vibration of concrete pouring and changes in load, which can lead to formwork deformation and grout leakage.
[0004] To address this issue, we propose a steel frame for connecting building formwork in civil engineering. Utility Model Content
[0005] The purpose of this utility model is to provide a steel frame for connecting building formwork in civil engineering, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a steel frame for connecting building formwork in civil engineering, comprising a formwork, the exterior of which is divided into a nine-square grid structure by partitions, with threading holes penetrating at the intersections of the partitions; three sets of circular grooves are vertically formed on the left and right sides of the formwork; two sets of formwork at adjacent horizontal positions are connected by connecting components, and two sets at vertically adjacent positions are connected by corner connecting plates and connecting components; a threaded rod is inserted into each set of threading holes, and both ends of the threaded rod are fitted with butterfly buckles and nuts, with a steel pipe mounted on the side of the butterfly buckle closest to the steel pipe; the connecting components include a fixing plate, and bolts are horizontally inserted into the fixing plate.
[0007] Preferably, the two ends of the butterfly buckle are set as arc-shaped structures, and the internal dimensions of the arc are adapted to the external dimensions of the steel pipe, which can increase the contact area between the two, and the arc-shaped contact can make the force more even.
[0008] Preferably, the butterfly buckle is movably sleeved on the threaded rod, and the nut is threaded onto the threaded rod, making installation and adjustment convenient and quick.
[0009] Preferably, the fixing plate is configured as a U-shaped structure, with a through hole on the fixing plate that matches a circular groove, and a fastening cap threaded onto the other end of the bolt. The U-shaped structure naturally forms a groove with openings on both sides, which can wrap the side of the template inside the groove. Combined with the use of the bolt, the positioning and fixing are more stable, reducing the lateral displacement of the component.
[0010] Preferably, the external corner connecting plate is configured as an isosceles right triangle structure, and the external corner connecting plate is provided with circular grooves at equal intervals from top to bottom. The external corner connecting plate is configured with two sets of vertical templates to provide a connection method.
[0011] Preferably, the width of the two sides of the corner connecting plate is the same as the width of the two sides of the template, and the position of the circular groove on the two sides of the corner connecting plate corresponds to the position of the circular groove on the two sides of the template. The consistent width ensures that the two sides of the corner connecting plate and the template are completely flush when spliced or overlapped, avoiding single-sided protrusion or depression caused by width difference, and improving the flatness of the overall structure.
[0012] This utility model provides a steel frame for connecting building formwork in civil engineering, which has the following advantages:
[0013] By using the connecting components and templates together, each set of templates can be installed. The fixing plate can tightly fasten the two sets of templates, reducing the gaps caused by the left and right separation between the two sets of templates. The bolts are inserted and tightened to prevent vertical displacement. The installation method is simple and quick, with fewer types of parts, and the assembly speed is fast. It is easy for construction workers to get started quickly, reducing the difficulty of operation and improving construction efficiency.
[0014] By using threaded tie rods, butterfly buckles, nuts, and steel pipes in combination, the opposing templates on both sides can generate mutual traction force. This traction force can effectively offset the external forces caused by vibration and impact during concrete pouring and load changes, thereby reducing the risk of loosening at the connection points. At the same time, the stable traction force can firmly fix the template position, prevent template deformation caused by loosening, and reduce the occurrence of grout leakage problems. Attached image description:
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a three-dimensional front view of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the template for this utility model;
[0018] Figure 3 This utility model Figure 1 A schematic diagram of a partial structure;
[0019] Figure 4 This utility model Figure 3 A schematic diagram of a partial structure;
[0020] Figure 5 This is a schematic diagram of the connection component of this utility model;
[0021] Figure 6 This is a schematic diagram of the external corner connecting plate of this utility model.
[0022] In the diagram: 1. Template; 2. Threading hole; 3. Circular groove; 4. Threading rod; 5. Butterfly buckle; 6. Nut; 7. Steel pipe; 8. Bolt; 9. Fixing plate; 10. External corner connecting plate. Detailed implementation method:
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Example 1
[0025] like Figure 1 , Figure 2 and Figure 5 As shown, this embodiment proposes a steel frame for connecting building formwork in civil engineering, including a formwork 1. The exterior of the formwork 1 is divided into a nine-square grid structure by partitions, and through holes 2 are provided at the intersections of the partitions. Three sets of circular grooves 3 are vertically provided on the left and right sides of the formwork 1. Two sets of formwork 1 at adjacent horizontal positions are connected by connecting components, and two sets of vertically adjacent positions are connected by corner connecting plates 10 and connecting components. The connecting components include a fixing plate 9, and bolts 8 are horizontally inserted on the fixing plate 9. The fixing plate 9 is set with a U-shaped structure, and the through holes on the fixing plate 9 are matched with the circular grooves 3. The other end of the bolts 8 is threaded with a fastening cap. The corner connecting plate 10 is set with an isosceles right triangle structure, and circular grooves 3 are provided at equal intervals from top to bottom on the corner connecting plate 10. The width of the two sides of the corner connecting plate 10 is the same as the width of the two sides of the formwork 1, and the positions of the circular grooves 3 on the two sides of the corner connecting plate 10 correspond to the positions of the circular grooves 3 on the two sides of the formwork 1.
[0026] In the above embodiments, during installation and use, the template 1 is aligned with the side of the template 1 and fixed with clamps. When using the clamps, first insert the fixing plate 9, then pass the bolt 8 through the fixing plate 9 and the circular groove 3 and tighten it to lock it. Fix all sides of the template 1 in this way. When fixing at corners, the corner connecting plate 10 is needed to connect the template 1 at the corner. The installation and fixing method is the same. Use the clamps to install and fix one side of the template 1 to one side of the corner connecting plate 10, and then install and fix the other side of the corner connecting plate 10 to one side of another set.
[0027] Example 2
[0028] like Figure 4 and Figure 5 As shown, based on the same concept as the above embodiment, this embodiment also proposes that: each group of threading holes 2 is provided with a threading rod 4, and both ends of the threading rod 4 are fitted with a butterfly buckle 5 and a nut 6. The side of the butterfly buckle 5 closest to the steel pipe 7 is fitted with the steel pipe 7; both ends of the butterfly buckle 5 are set with an arc-shaped structure, and the internal size of the arc is adapted to the external size of the steel pipe 7; the butterfly buckle 5 is movably sleeved on the threading rod 4, and the nut 6 is threaded on the threading rod 4.
[0029] In the above embodiment, the threaded rod 4 is inserted through the threaded holes 2 of the two sets of opposing templates 1, and the two ends of the threaded rod 4 are respectively fitted with butterfly buckles 5 and threaded nuts 6. Then, the steel pipe 7 is placed between the butterfly buckles 5 and the template 1 and the nuts 6 are tightened to secure the steel pipe 7 tightly between the butterfly buckles 5 and the template 1. The same operation is performed on the two ends of the threaded rod 4. This can strengthen the templates 1 and set mutual traction force, and the installation is completed.
[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0032] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A steel frame for connecting formwork in civil engineering, comprising formwork (1), characterized in that: The template (1) is divided into a nine-square grid structure by partitions, and a wire-threading hole (2) is opened through the intersection of the partitions. Three sets of circular grooves (3) are opened vertically on the left and right sides of the template (1). The two sets of templates (1) in adjacent horizontal positions are connected by a connecting component, and the two sets of vertically adjacent positions are connected by a corner connecting plate (10) and a connecting component. Each of the threading holes (2) is equipped with a threading rod (4), and both ends of the threading rod (4) are fitted with a butterfly buckle (5) and a nut (6). The butterfly buckle (5) is fitted with a steel pipe (7) on the side close to the steel pipe (7). The connecting assembly includes a fixing plate (9), and bolts (8) are inserted laterally on the fixing plate (9).
2. The steel frame for connecting building formwork in civil engineering according to claim 1, characterized in that: The two ends of the butterfly buckle (5) are set as arc-shaped structures, and the internal dimensions of the arc are adapted to the external dimensions of the steel pipe (7).
3. The steel frame for connecting building formwork in civil engineering according to claim 1, characterized in that: The butterfly buckle (5) is movably sleeved on the threaded pull rod (4), and the nut (6) is threaded onto the threaded pull rod (4).
4. A steel frame for connecting building formwork in civil engineering according to claim 1, characterized in that: The fixing plate (9) is configured as a U-shaped structure, and the through hole on the fixing plate (9) is matched with the circular groove (3). The other end of the bolt (8) is threaded with a fastening cap.
5. A steel frame for connecting building formwork in civil engineering according to claim 1, characterized in that: The external corner connecting plate (10) is configured as an isosceles right triangle structure, and the external corner connecting plate (10) is provided with circular grooves (3) at equal intervals from top to bottom.
6. A steel frame for connecting building formwork in civil engineering according to claim 5, characterized in that: The width of the two sides of the corner connecting plate (10) is the same as the width of the two sides of the template (1), and the position of the circular groove (3) opened on both sides of the corner connecting plate (10) corresponds to the position of the circular groove (3) on both sides of the template (1).