Formwork device for concrete wall pouring

Abstract

This utility model discloses a formwork device for concrete wall casting, including a formwork mechanism and a fixing mechanism. The formwork mechanism is used to form the concrete wall on both sides of the casting space. The formwork mechanism includes several formwork units for vertical splicing, connecting components for installation on the side of the formwork unit away from the casting space, anti-leakage components for the bottom of the formwork unit, and a capping formwork for pressing down on the top of the formwork unit to seal the upper end of the casting space. The fixing mechanism includes a vertical connecting component for connecting the connecting components on two adjacent formwork units at the joint, and a horizontal tie component for pulling the formwork units on both sides of the casting space together. This device is easy to install and dismantle, saves time and labor, has high formwork efficiency, and can effectively prevent grout leakage at the bottom of the formwork, resulting in high-quality concrete wall casting.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular, to a formwork device for pouring concrete walls. Background Technology

[0002] Currently, most building construction projects on the market use cast-in-place concrete structures for the main structure. The construction of shear walls and structural columns requires formwork to support the weight and lateral pressure of the concrete during pouring, ensuring the shape and position of the wall during construction. In shear wall construction, formwork and reinforcing steel are first erected, then concrete is poured, and the formwork is removed after the concrete reaches the required strength.

[0003] Chinese patent CN203795859U discloses a large formwork support structure for fair-faced concrete shear walls, including bamboo plywood formwork and tie bolts. The bamboo plywood formwork is installed on the outer dimension lines of both sides of the concrete shear wall. Multiple square timbers are evenly installed outside the bamboo plywood formwork, and multiple horizontal steel pipe ribs are evenly installed outside the square timbers. Multiple sets of vertical steel pipe ribs are evenly installed outside the horizontal steel pipe ribs. Each set of vertical steel pipe ribs consists of two parallel steel pipes connected together. The vertical steel pipe ribs are parallel to the square timbers. The tie bolts pass vertically through the concrete shear wall and are fixedly installed between the vertical steel pipe ribs on both sides. This patent ensures reliable formwork support for fair-faced concrete shear wall structures and avoids component deformation during construction.

[0004] However, the formwork erection method described in the aforementioned patent requires various auxiliary materials, such as square timber, multiple steel pipes, and steel pipe fasteners. The formwork erection method is complex, requires extensive manual labor, has a long construction cycle, low efficiency, high labor costs, and is difficult to manage materials. Since different building shapes require different formwork, most formwork cannot be reused, resulting in significant waste. Furthermore, after the wall formwork is installed, uneven concrete surfaces cause gaps at the contact points between the bottom of the formwork and the concrete slab, leading to grout leakage and potential quality issues. Additionally, using traditional formwork such as bamboo or wood for concrete pouring results in uneven concrete surfaces and hollow areas during demolding, leading to poor concrete forming and requiring subsequent plastering, increasing construction time and costs. Utility Model Content

[0005] This utility model provides a formwork device for concrete wall pouring to solve the technical problems of low formwork efficiency and poor concrete forming quality after demolding in the prior art.

[0006] According to one aspect of the present invention, a formwork device for pouring concrete walls is provided, comprising:

[0007] A template mechanism is used to form concrete walls on both sides of a pouring space. The template mechanism includes several template units for vertical splicing, a connecting component for installation on the side of the template unit away from the pouring space, a grout-proof component for installation at the bottom of the template unit to prevent grout leakage, and a capping template for pressing on the top of the template unit to close the upper end of the pouring space.

[0008] The fixing mechanism includes a vertical connecting component for being disposed at the joint of two template units and connecting the connecting components on the two adjacent template units into a whole, and a horizontal tie component for pulling the template units on both sides of the pouring space together.

[0009] Furthermore, the anti-leakage assembly includes a positioning frame fixed to the bottom of the template unit, a height adjustment screw arranged vertically and threadedly connected to the positioning frame, and a leak-stopping frame movably inserted vertically within the positioning frame. The height adjustment screw is connected to the leak-stopping frame and is used to drive the leak-stopping frame to move up and down relative to the positioning frame when rotated.

[0010] The leak-stopping frame, the positioning frame, and the end face of the template unit on the side closest to the pouring space are on the same plane.

[0011] Furthermore, the side edge of the template unit is provided with a pull groove, and the pull grooves on two adjacent template units are used to splice each other to form a first pull hole for the horizontal pull assembly to pass through vertically;

[0012] The tie grooves are spaced apart along the length of the template unit.

[0013] Furthermore, the connecting assembly includes a top support member disposed on the top of the template unit, and a connecting fastener disposed between the top support member and the anti-leakage grout assembly. The top support member is used to be installed on the template unit to connect the vertical connecting assembly and support the capping template, and the connecting fastener is used to be installed on the template unit to connect the vertical connecting assembly.

[0014] The connecting fasteners are provided in several parts along the length of the template unit and are offset from the tie groove.

[0015] Furthermore, the vertical connecting assembly includes a vertical rod for being disposed at the joint of two template units, and a connecting rod for connecting the connecting assemblies on two adjacent template units;

[0016] The vertical rod has a through hole for the connecting rod to pass through along its transverse direction, and a second tie hole for the transverse tie assembly to pass through. Both the through hole and the second tie hole are spaced apart along the length of the vertical rod, and the through hole and the second tie hole are staggered on the vertical rod.

[0017] Furthermore, the connecting fastener includes a first connecting plate for being connected to the template unit in parallel with respect to the template unit, and a second connecting plate for being disposed perpendicular to the template unit and close to the side of the template unit. The first connecting plate and the second connecting plate are connected to each other to form a first L-shaped structure.

[0018] The second connecting plate has a connecting hole corresponding to the second pull hole, and the connecting rod is used to pass through the connecting hole and the second pull hole to connect the template unit and the vertical rod.

[0019] Furthermore, the transverse tie assembly includes a horizontal bar for pressing against the side of the vertical bar away from the template unit, and tie bolts for transversely penetrating both sides of the casting space;

[0020] The crossbar has a third tie hole for the tie bolt to pass through. Multiple third tie holes are spaced apart along the length of the crossbar. The first tie hole, the second tie hole and the third tie hole are arranged one-to-one in a direction perpendicular to the casting space for the tie bolt to pass through.

[0021] Furthermore, the top support includes a first top support plate for being connected to the template unit in parallel relative to the template unit, and a second top support plate for being disposed perpendicular to the template unit and close to the side of the template unit. The first top support plate and the second top support plate are connected to form a second L-shaped structure. The top of the second L-shaped structure is provided with a placement groove for securing the top template.

[0022] The second top support plate has a vertically formed strip hole for the connecting rod to pass through, and the lower end of the second top support plate has a clearance groove for avoiding the crossbar.

[0023] Furthermore, the crossbar is provided with locking holes at both ends for inserting pins to lock the ends of the crossbar.

[0024] Furthermore, the fixing mechanism also includes a diagonal bracing assembly for being disposed at the lower part of the pouring space and for reinforcing the support of the template unit, the diagonal bracing assembly being installed on the template unit, the horizontal bar and / or the vertical bar.

[0025] This utility model has the following beneficial effects:

[0026] This utility model discloses a formwork device for concrete wall pouring. The formwork mechanism uses modular formwork units that are vertically assembled to form the pouring space for the concrete wall. It allows for rapid assembly and disassembly, significantly improving construction efficiency and adapting to the pouring needs of concrete walls of different sizes. It is suitable for various building structures, such as building cores, basements, and residential buildings, effectively expanding its application range. The formwork mechanism is symmetrically positioned on both sides of the pouring space, allowing for double-sided shaping of the concrete wall and effectively improving the forming quality. Preferably, the formwork units are made of plastic-coated formwork, which is lightweight, high-strength, and non-adhesive, avoiding problems such as uneven concrete surfaces and hollow areas during demolding. This results in a good concrete wall surface finish, allowing for direct plastering after demolding, saving construction time and costs. By installing anti-leakage components at the bottom of the formwork units, the problem of bottom leakage during concrete pouring, which occurs with traditional formwork, is effectively solved, ensuring the forming quality of the concrete wall. The fixing mechanism connects with the connecting components via horizontal connecting components to splice and fix adjacent template units. Vertical tie components secure the template units on both sides of the concrete wall's pouring space, preventing deformation or displacement during pouring and ensuring the wall's verticality and flatness. This device simplifies formwork support and reduces the complexity of material management through the cooperation of the template and fixing mechanisms. It allows for rapid installation and dismantling, saving time and labor, significantly improving formwork efficiency. Furthermore, the standardized design of each component allows for reuse, reducing material waste and idle time, lowering maintenance costs, and making it highly practical.

[0027] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0029] Figure 1 This is a structural schematic diagram of a formwork device for concrete wall pouring according to a preferred embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the AA cross-section of a formwork device for concrete wall pouring according to a preferred embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the template mechanism of a preferred embodiment of the present invention;

[0032] Figure 4 This is a structural schematic diagram of the connecting fastener of this utility model;

[0033] Figure 5 This is a structural schematic diagram of the top pressing component of this utility model;

[0034] Figure 6 This is a structural schematic diagram of the anti-leakage grouting component of this utility model.

[0035] Legend:

[0036] 10. Pouring space; 20. Formwork mechanism; 21. Formwork unit; 211. Tie groove; 22. Top support; 221. First top support plate; 222. Second top support plate; 2221. Strip hole; 23. Connecting fastener; 231. First connecting plate; 232. Second connecting plate; 2321. Connecting hole; 24. Leakage prevention assembly; 241. Positioning frame; 242. Height adjustment screw; 243. Leakage plugging frame; 30. Fixing mechanism; 31. Vertical connection assembly; 311. Vertical rod; 3111. Second tie hole; 312. Connecting rod; 32. Horizontal tie assembly; 321. Horizontal rod; 3211. Third tie hole; 322. Tie bolt; 40. Coping formwork. Detailed Implementation

[0037] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0038] like Figure 1 , Figure 2 and Figure 3As shown, the concrete wall pouring formwork device of this embodiment includes a formwork mechanism 20 and a fixing mechanism 30. The formwork mechanism 20 is used to set on both sides of the pouring space 10 to form the concrete wall, and the fixing mechanism 30 is used to support the formwork mechanism 20 and connect the formwork mechanism 20 into a whole. Specifically, the formwork mechanism 20 includes several formwork units 21, a grout leakage prevention component 24 set at the bottom of the formwork unit 21, a connecting component for installing on the side of the formwork unit 21 away from the pouring space 10, and a capping formwork 40 for pressing on the top of the formwork unit 21 to close the upper end of the pouring space 10. The formwork unit 21 is modularly customized, and its height is adapted to the height of the concrete wall to be poured. The concrete wall pouring space 10 is formed by vertically splicing the modular formwork units 21. It can be quickly assembled and disassembled, adapting to the pouring needs of concrete walls of different sizes, significantly improving construction efficiency, and adapting to the pouring needs of concrete walls of different sizes. It is suitable for various building structures, such as building core tubes, basements, residential buildings, etc., effectively expanding the scope of application. The anti-leakage component 24 at the bottom of the template unit 21 can effectively solve the problem of bottom leakage of grout during the concrete pouring process of traditional templates, ensuring the forming quality of the concrete wall. The template mechanism 20 is symmetrically arranged on both sides of the pouring space 10, which can shape the concrete wall on both sides, effectively improving the forming quality of the concrete wall.

[0039] The fixing mechanism 30 includes a vertical connecting component 31 and a horizontal tie component 32. The vertical connecting component 31 is used at the joint of two template units 21 and connects the connecting components on the two adjacent template units 21 into a whole. Specifically, after the template units 21 are vertically spliced, the connecting components on the two adjacent template units 21 are located on both sides of the joint. By installing the vertical connecting component 31 between the two connecting components at the joint of the template units 21 and fixing the connecting components to the vertical connecting component 31, the spliced ​​template units 21 can be connected into a whole. The horizontal tie component 32 is used to fasten the template units 21 and the vertical connecting component 31 connected into a whole to both sides of the pouring space 10. Thus, through the cooperation of the vertical connecting component 31 and the horizontal tie component 32, the template units 21 on both sides of the pouring space 10 of the concrete wall can be firmly connected and fastened, preventing the template units 21 from deforming or shifting during the pouring process and ensuring the verticality and flatness of the wall.

[0040] Specifically, based on the design drawings of the concrete wall, the required number and size of template units 21, as well as the number of vertical connecting components 31 and horizontal tie components 32, can be calculated using software. Based on this, the design drawings are prepared, and then the template units 21 are processed using a CNC engraving machine according to the dimensions of the design drawings, ensuring the accuracy of each template unit 21. The anti-leakage component 24 and the capping component are then installed on the processed template units 21 to assemble the template mechanism 20. Simultaneously, the vertical connecting components 31 and horizontal tie components 32 are processed according to the dimensions of the template units 21. Then, the construction drawings are used for layout and positioning to determine the position and dimensions of the formwork. The prefabricated template mechanism 20, vertical connecting components 31, and horizontal tie components 32 are transported to the construction site and assembled according to the layout positions to form an integrated formwork structure, ensuring a firm connection and accurate dimensions. Finally, tools such as a level and plumb line are used to adjust the verticality and horizontality to ensure that the formwork structure meets the design requirements. Then, concrete can be poured in the pouring space 10 formed by the formwork structure, and the quality of the concrete after demolding can be checked to ensure that the concrete surface is flat, without cracks or hollows, so that its molding quality meets the requirements of no plastering.

[0041] like Figure 1 , Figure 2 and Figure 6 As shown, the anti-leakage assembly 24 includes a positioning frame 241, an adjusting screw 242, and a leak-stopping frame 243. The positioning frame 241 is installed at the bottom of the template unit 21. The positioning frame 241 includes a positioning block located on the side of the template unit 21 near the pouring space 10 and an adjusting block located on the side of the positioning block away from the pouring space 10. The adjusting block has a threaded hole for the adjusting screw 242 to pass through. The positioning block has a movable groove. The leak-stopping frame 243 includes a vertical plate that moves vertically through the movable groove and a horizontal plate located on the side of the vertical plate near the adjusting screw 242. The vertical plate and the horizontal plate are connected to form an L-shaped frame. The bottom of the adjusting screw 242 is rotatably installed in the horizontal plate circumferentially and is vertically confined within the horizontal plate. The end faces of the positioning block and the vertical plate near the pouring space 10 are on the same plane as the end face of the template unit 21 near the pouring space 10. Preferably, the positioning block and / or the vertical plate are provided with a limiting structure to prevent the vertical plate from falling out of the movable groove. Preferably, the anti-leakage component 24 is located at the middle position of the bottom of the template unit 21. Thus, rotating the height adjustment screw 242 can control the raising and lowering of the height adjustment screw 242, thereby driving the leak-stopping frame 243 to rise and fall within the positioning frame 241, thereby sealing the gap at the bottom of the template unit 21, effectively preventing grout leakage at the bottom, and ensuring the forming quality of the concrete wall.

[0042] like Figure 2 and Figure 3As shown, the template unit 21 has tie grooves 211, and several tie grooves 211 are spaced apart along the length of the template unit 21. Preferably, in this embodiment, the tie grooves 211 are symmetrically arranged on both sides of the template unit, and two template units 21 are spliced ​​together so that the two tie grooves 211 form a first tie hole. The first tie hole is used for the transverse tie assembly 32 to pass through vertically, so that the template unit 21 is tightened to both sides of the casting space 10 by the transverse tie assembly 32.

[0043] Preferably, template unit 21 uses a plastic-coated template, which is made entirely of premium eucalyptus wood core, with each piece free of knots and holes, and layers of adhesive applied to ensure that each board is free of hollow areas and delamination. The surface is coated with a PP plastic film using large-scale equipment, employing a process of drilling holes first, followed by hot-melt and high-pressure embedding. This film is lightweight, strong, and does not easily adhere to surfaces, preventing unevenness and hollow areas on the concrete surface during demolding. This results in a better-formed concrete wall surface, allowing for direct plastering after demolding, saving construction time and costs.

[0044] like Figure 1 , Figure 2 and Figure 3 As shown, the connecting assembly includes a top support 22 located on the top of the template unit 21, and a connecting fastener 23 located between the top support 22 and the anti-leakage assembly 24. The top support 22 is symmetrically installed on both sides of the template unit 21 to connect the vertical connecting assembly 31 and support the top template 40. The connecting fastener 23 is symmetrically installed on both sides of the template unit 21 to connect the vertical connecting assembly 31. Thus, the top support 22 and the connecting fastener 23 can be connected to the vertical connecting assembly 31 to tighten and fix the spliced ​​template unit 21, so that the ends of two adjacent template units 21 fit tightly together, preventing grout leakage from the joints of the template units 21 and ensuring the forming quality of the concrete wall.

[0045] Several connecting fasteners 23 are provided along the length of the template unit 21, and the connecting fasteners 23 and the tie grooves 211 are staggered, so that the template unit 21 can be connected to the horizontal tie assembly 32 through the tie grooves 211 and to the vertical connecting assembly 31 through the connecting fasteners 23, which greatly enhances the firmness of the connection of the template unit 21 and ensures the safety and reliability of the structure.

[0046] like Figure 1 and Figure 2As shown, the vertical connecting assembly 31 includes a vertical rod 311 and a connecting rod 312. The vertical rod 311 is vertically positioned between two adjacent template units 21, and the connecting rod 312 is horizontally inserted into the vertical rod 311 and the connecting assembly to fix the two adjacent template units 21. The vertical rod 311 has a through hole for the connecting rod 312 to pass through, and a second tie hole 3111 for the horizontal tie assembly 32 to pass through. Preferably, the connecting rod 312 includes a screw and a nut. After the template units 21 are assembled, the vertical rod 311 is positioned between two adjacent template units 21, and the connecting fasteners 23 on the template units 21 are positioned on both sides of the vertical rod 311. Then, the screw is horizontally inserted into the second tie hole 3111 of the vertical rod 311 and the two connecting fasteners 23, thus achieving the splicing and fixing of the two adjacent template units 21.

[0047] Multiple through holes and second tie holes 3111 are provided at intervals along the length of the vertical rod 311, and the through holes and second tie holes 3111 are staggered on the vertical rod 311. This not only allows the connecting rod 312 to be connected to the connecting fastener 23 in the transverse direction through the through holes in the vertical rod 311 to achieve splicing and fixing of two adjacent template units 21, but also allows the position of the second tie hole 3111 in the vertical rod 311 to correspond with the position of the first tie hole formed by splicing two template units 21. This allows the transverse tie assembly 32 to be vertically inserted into the casting space 10 by passing through the second tie hole 3111 in the vertical rod 311 and the first tie hole on the template unit 21 in sequence, so as to tighten the template units 21 and the horizontal rod 321 on both sides of the casting space 10.

[0048] like Figure 1 and Figure 4 As shown, the connecting fastener 23 includes a first connecting plate 231 and a second connecting plate 232. The first connecting plate 231 and the second connecting plate 232 are connected to each other to form a first L-shaped structure. The first connecting plate 231 is arranged parallel to the template unit 21 and is bolted to the end face of the template unit 21. The second connecting plate 232 is arranged perpendicular to the template unit 21 and close to the side of the template unit 21. Thus, when the template units 21 are spliced, the second connecting plates 232 on both sides of the joint can form a U-shaped groove to accommodate the vertical rod 311.

[0049] The second connecting plate 232 has a connecting hole 2321 for the connecting rod 312 to pass through. By passing the connecting rod 312 through the connecting hole 2321 and the second tie hole 3111, the connecting fastener 23 can be fixed to the vertical rod 311, thereby realizing the splicing and fixing of the template unit 21.

[0050] like Figure 1 and Figure 2As shown, the transverse connection assembly includes a horizontal bar 321 and a tie bolt 322. The horizontal bar 321 is arranged horizontally between two adjacent connecting fasteners 23, and the horizontal bar 321 is located on the side of the vertical bar 311 away from the template unit 21 to press the vertical bar 311 onto the template unit 21. The tie bolt 322 is used to penetrate vertically through the pouring space 10 in the transverse direction and to tighten the template unit 21 and the vertical bar 311 connected as a whole to both sides of the pouring space 10.

[0051] Specifically, a third tie hole 3211 is provided in the horizontal bar 321. Multiple third tie holes 3211 are spaced apart along the length of the horizontal bar 321. The first tie hole, second tie hole 3111, and third tie hole 3211 are arranged one-to-one in a direction perpendicular to the pouring space 10 for the tie bolts 322 to pass through. In use, after connecting the connecting assembly to the template unit 21, the template unit 21 is spliced. Then, the vertical bar 311 is placed at the joint of the template unit 21 and connected and fixed with the connecting assembly. The horizontal bar 321 is then placed horizontally on the horizontal bar 321 between the two connecting fasteners 23, ensuring that the first tie hole of the template unit 21, the second tie hole 3111 of the vertical bar 311, and the third tie hole 3211 of the horizontal bar 321 are arranged one-to-one. The tie bolts 322 are then inserted through the pouring space. The outer side of the space 10 is vertically inserted into the pouring space 10 through the third tie hole 3211, the second tie hole 3111 and the first tie hole in sequence, and extends out from the first tie hole, the second tie hole 3111 and the third tie hole 3211 on the other side of the pouring space 10 in sequence. By tightening the nut on the side of the crossbar 321 away from the template unit 21, the template unit 21 is tightened, ensuring that the two sides of the pouring space 10 are evenly stressed, and ensuring that the shaping quality of both sides of the concrete meets the requirements.

[0052] Preferably, in this embodiment, both the horizontal bar 321 and the vertical bar 311 are made of steel pipe. Steel pipe has high rigidity, high strength, light weight, and strong weather resistance, and can replace multiple materials in traditional formwork processes, achieving "one pipe for all uses," simplifying the construction process and reducing the complexity of material management. Preferably, the vertical bar 311 is made of square steel pipe, and the horizontal bar 321 is made of square-round steel pipe.

[0053] like Figure 1 and Figure 5 As shown, the top support 22 includes a first top support plate 221 and a second top support plate 222. The first top support plate 221 is arranged parallel to the template unit 21 and connected to the template unit 21. The second top support plate 222 is arranged perpendicular to the template unit 21 and close to the side of the template unit 21. The first top support plate 221 and the second top support plate 222 are connected to form a second L-shaped structure. The top of the second L-shaped structure is provided with a placement groove for holding the top pressure template 40.

[0054] The second top support plate 222 has a vertically oriented slot 2221. A connecting rod 312 can be inserted through the slot 2221 and the second pair of pull-out holes in the vertical rod 311 to fix the second top support plate 222 onto the vertical rod 311, ensuring the structural stability of the top support frame. The slot 2221 increases the vertical adjustment range of the connecting rod 312, facilitating precise alignment between the connecting rod 312 and the second pair of pull-out holes 3111 on the vertical rod 311, thus improving assembly efficiency. Preferably, the lower end of the second top support plate 222 has a clearance groove, the shape of which matches the outer wall shape of the horizontal rod 321, allowing the second top support plate 222 to be placed and secured onto the horizontal rod 321, further enhancing the structural stability of the top support frame.

[0055] like Figure 1 As shown, locking holes are provided at both ends of the crossbar 321. By inserting the pins into the locking holes along the height direction, the ends of the crossbar 321 can be locked, thereby improving the structural stability of the transverse tie assembly 32.

[0056] Preferably, the fixing mechanism 30 further includes a diagonal bracing assembly, which is located at the lower part of the pouring space 10 to strengthen the support for the formwork unit 21, prevent the formwork mechanism 20 and the fixing mechanism 30 connected as a whole from tilting, improve the overall stability of the device and the robustness and reliability of the structure, ensure the verticality and horizontality within the pouring space 10, and ensure the forming quality of the concrete wall. Preferably, the diagonal bracing assembly is installed on the formwork unit 21, the horizontal bar 321 and / or the vertical bar 311.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 formwork device for concrete wall casting, characterized by, include: The template mechanism (20) is used to be set on both sides of the pouring space (10) to form a concrete wall. The template mechanism (20) includes a plurality of template units (21) for vertical splicing, a connecting component for installation on the side of the template unit (21) away from the pouring space (10), a grout-proof component (24) for being set at the bottom of the template unit (21) to prevent grout leakage at the bottom, and a capping template (40) for pressing on the top of the template unit (21) to close the upper end of the pouring space (10). The fixing mechanism (30) includes a vertical connecting component (31) for being located at the joint of two template units (21) and connecting the connecting components on the two adjacent template units into a whole, and a horizontal tie component (32) for pulling the template units (21) on both sides of the pouring space (10) together.

2. The formwork device for concrete wall casting according to claim 1, characterized in that, The anti-leakage assembly (24) includes a positioning frame (241) fixed to the bottom of the template unit (21), a height adjustment screw (242) arranged vertically and threadedly connected to the positioning frame (241), and a leak-stopping frame (243) movably inserted vertically into the positioning frame (241). The height adjustment screw (242) is connected to the leak-stopping frame (243) and is used to drive the leak-stopping frame (243) to move up and down relative to the positioning frame (241) when rotating. The end faces of the plugging frame (243), the positioning frame (241), and the template unit (21) on the side closest to the pouring space (10) are on the same plane.

3. The formwork device for concrete wall casting according to claim 1, characterized in that, The template unit (21) has a pull groove (211) on its side edge. The pull grooves (211) on two adjacent template units (21) are used to splice each other to form a first pull hole for the horizontal pull assembly (32) to pass through vertically. The tie grooves (211) are spaced apart along the length of the template unit (21).

4. The formwork device for concrete wall casting according to claim 3, characterized in that, The connecting assembly includes a top support (22) disposed on the top of the template unit (21), and a connecting fastener (23) disposed between the top support (22) and the anti-leakage assembly (24). The top support (22) is used to be installed on the template unit (21) to connect the vertical connecting assembly (31) and support the top template (40). The connecting fastener (23) is used to be installed on the template unit (21) to connect the vertical connecting assembly (31). The connecting fasteners (23) are provided in several places along the length direction of the template unit (21) and are offset from the tie grooves (211).

5. The formwork device for concrete wall casting according to claim 4, characterized in that, The vertical connecting component (31) includes a vertical rod (311) for being installed at the joint of two template units (21), and a connecting rod (312) for connecting the connecting components on two adjacent template units (21); The vertical rod (311) has a through hole for the connecting rod (312) to pass through along the transverse direction, and a second pull hole (3111) for the transverse pull assembly (32) to pass through. Both the through hole and the second pull hole (3111) are provided in multiples at intervals along the length of the vertical rod (311), and the through hole and the second pull hole (3111) are staggered on the vertical rod (311).

6. The formwork device for concrete wall casting according to claim 5, characterized in that, The connecting fastener (23) includes a first connecting plate (231) for being connected to the template unit (21) in parallel relative to the template unit (21), and a second connecting plate (232) for being disposed perpendicular to the template unit (21) and close to the side of the template unit (21). The first connecting plate (231) and the second connecting plate (232) are connected to each other to form a first L-shaped structure. The second connecting plate (232) has a connecting hole (2321) corresponding to the second pull hole (3111). The connecting rod (312) is used to pass through the connecting hole (2321) and the second pull hole (3111) to connect the template unit (21) and the vertical rod (311).

7. The formwork device for concrete wall casting according to claim 5, characterized in that, The transverse tie assembly (32) includes a horizontal bar (321) for pressing against the side of the vertical bar (311) away from the template unit (21), and tie bolts (322) for transversely penetrating both sides of the casting space (10); The crossbar (321) has a third tie hole (3211) for the tie bolt (322) to pass through. The third tie hole (3211) is provided in multiple spaces along the length of the crossbar (321). The first tie hole, the second tie hole (3111) and the third tie hole (3211) are provided one-to-one in a direction perpendicular to the casting space (10) for the tie bolt (322) to pass through.

8. The formwork device for concrete wall casting according to claim 7, characterized in that, The top support (22) includes a first top support plate (221) for being connected to the template unit (21) in parallel relative to the template unit (21), and a second top support plate (222) for being disposed perpendicular to the template unit (21) and close to the side of the template unit (21). The first top support plate (221) and the second top support plate (222) are connected to form a second L-shaped structure. The top of the second L-shaped structure is provided with a placement groove for securing the top pressure template (40). The second top support plate (222) has a vertically oriented strip hole (2221) for the connecting rod (312) to pass through, and the lower end of the second top support plate (222) has a clearance groove for avoiding the crossbar (321).

9. The formwork device for concrete wall casting according to claim 7, characterized in that, The crossbar (321) is also provided with locking holes, which are located at both ends of the crossbar (321) for inserting pins to lock the ends of the crossbar (321).

10. The formwork device for concrete wall casting according to claim 7, characterized in that, The fixing mechanism (30) further includes a diagonal bracing assembly for being disposed at the lower part of the casting space (10) and for reinforcing the support of the template unit (21), the diagonal bracing assembly being installed on the template unit (21), the horizontal bar (321) and / or the vertical bar (311).

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