An assembled thermal insulation formwork wall with a dovetail mortise and tenon structure and its application method

Abstract

An assembled thermal insulation formwork wall with a dovetail mortise and tenon structure and its application method, including a thermal insulation board body and a connecting bridge. Dovetail structures are arranged around the thermal insulation board body. The dovetail mechanism is divided into a convex dovetail and a concave dovetail. Holes are arranged on the dovetail structure. Dovetail grooves are arranged on the surface of the thermal insulation board body to fix the size of the concrete cavity and the size of the concrete protective layer with an embedded connecting bridge. One side of the connecting bridge screws into a nut to fasten the two side mounting plates, and at the same time plays a role in limiting the thermal insulation board body. The other side of the connecting bridge plays a role in supporting the two side mounting plates and ensuring the size of the concrete cavity, and at the same time limits the thermal insulation board body at the same position. The two side connecting bridges cooperate with each other to ensure the size and position of the concrete cavity and the outer protective layer are fixed, and the quality is controllable during the construction process.

Description

Technical Field

[0001] The invention relates to the technical field of building walls, in particular to an assembled thermal insulation formwork wall with a dovetail-shaped structure and an application method thereof. Background Art

[0002] The insulation board body serves as the insulation layer of the building wall, which has the effect of heat preservation and sound insulation. The safety and fire protection standard field of the building places the insulation board body in the middle of the concrete layer to form a sandwich structure.

[0003] During the pouring process, the concrete poured at the bottom of the insulation board body is not poured at the same time. It is often the case that one side of the insulation board body is poured and then the other side. Moreover, the concrete is poured from the end with concrete into the end of the cavity. These will cause uneven force on the insulation board body, causing the insulation board body to shift, misalign or even break, thereby destroying the internal structure of the wall.

[0004] The insulation board body in the existing building insulation wall is relatively low in height and is relatively complicated to assemble. Connectors need to be inserted during assembly. When fastening devices such as tension anchors are not used for fixing or when fastening devices such as tension anchors are used for fixing, the insulation board body often becomes detached from the connection, moves, or is misaligned. In addition, the insulation board body is light in weight and flammable and is often affected by the external environment. Excess material often appears on the surface of the finished wall, such as excess steel bars used for the fastening device. Summary of the invention

[0005] In view of the above-mentioned deficiencies, the present invention provides an assembled thermal insulation formwork wall with a dovetail-shaped structure and an application method thereof.

[0006] The present invention is achieved through the following technical solutions:

[0007] An assembled thermal insulation formwork wall with a dovetail-shaped structure, comprising a thermal insulation board body, a concrete protective layer, a concrete shear wall, steel bars, a formwork, an iron pipe, a tension anchor bolt and a connector, wherein a dovetail groove is arranged on the surface of the thermal insulation board body, a dovetail structure is arranged around the thermal insulation board body, the dovetail structure comprises a convex dovetail and a concave dovetail, the convex dovetail and the concave dovetail are staggeredly distributed around the thermal insulation board body, and holes are arranged on the convex dovetail and the concave dovetail;

[0008] The connecting piece includes a first connecting bridge and a second connecting bridge. The first connecting bridge consists of three sections. Threaded structures are provided on the steel bars at the left and right sections, and tension nuts are installed to form a tension anchor bolt structure. Threaded structures are provided at both ends of the steel bar in the middle section. The left and right sections are connected to the middle section through connection blocks. Threaded structures are provided inside the connection blocks. An injection molded housing A is provided on the steel bar in the middle section of the first connecting bridge. An injection molded plate A is provided at the left end of the injection molded housing A, and an injection molded plate B is provided at the right end. A through hole A is provided on the injection molded plate A;

[0009] Support plates are provided at both ends of the steel bar of the second connecting bridge. An injection molded housing B is provided on the steel bar. An injection molded plate C is provided at the left end of the injection molded housing B, and an injection molded plate D is provided at the right end. A through hole B is provided on the injection molded plate D;

[0010] The injection molded housing A and the injection molded housing B are installed on the holes around the insulation board body. The second connecting bridge is inserted into the first connecting bridge. The through hole B passes through the right connection block, and the left support plate passes through the through hole A. The injection molded plate B abuts against the injection molded plate D, and the injection molded plate C abuts against the injection molded plate A;

[0011] The insulation board body is spliced through the connecting piece. Templates are provided at both ends of the connection block and the support plate in the connecting piece. The tension anchor bolt is screwed into the connection block, and a steel pipe is placed inside it. The steel pipe is fixed on the template. A concrete protective layer is provided in the left cavity of the insulation board body, and a concrete shear wall is provided in the right cavity. Mesh steel bars are provided in the concrete.

[0012] Further, one side of the insulation board body may be provided with a dovetail groove, and the other side is provided with a first plastering layer. The thickness of the first plastering layer is 25 - 30 mm.

[0013] Further, a second plastering layer is provided on the surface of the first plastering layer, and the sum of the thickness of the surface of the first plastering layer and the thickness of the second plastering layer reaches 50 mm.

[0014] Further, through holes C corresponding to the first connecting bridge are provided on the template.

[0015] Further, the connection block can pass through the through hole B, and the injection molded plate B cannot pass through the through hole B.

[0016] Further, the support plate can pass through the through hole A, and the injection molded plate C cannot pass through the through hole A.

[0017] Further, the cross sections of the through hole A and the through hole B are squares with side lengths of 40 mm or circles with radii of 20 mm.

[0018] Further, the cross sections of the support plate and the connection block are squares with side lengths of 40 mm or circles with radii of 30 mm.

[0019] Furthermore, the cross-sections of the injection-molded plate B and the injection-molded plate C are squares with a side length of 60 mm or circles with a radius of 30 mm.

[0020] An application method of an assembled thermal insulation formwork wall with a dovetail mortise and tenon structure includes the following steps:

[0021] S1: Install the injection-molded housing A of the first connecting bridge on the hole on one side of the thermal insulation board body, and install the injection-molded housing B of the second connecting bridge on the hole on the other side of the thermal insulation board body;

[0022] S2: After fixing one thermal insulation board body, push another thermal insulation board body into the fixed thermal insulation board body. During the pushing process, the second connecting bridge cooperates with the first connecting bridge, that is, the second connecting bridge is inserted into the first connecting bridge, the through hole B passes through the right end connecting block, the left end support plate passes through the through hole A, the injection-molded plate B abuts against the injection-molded plate D, the injection-molded plate C abuts against the injection-molded plate A, and the convex dovetail cooperates with the concave dovetail;

[0023] S3: Reinforce the steel bars in the concrete layer shear wall cavity of the thermal insulation board body, place templates at both ends of the connecting piece, the threaded structure on the tension anchor bolt passes through the through hole C on the template and is screwed into the connecting block, place a square pipe between the tension anchor bolt and the template, and tighten the tension nut;

[0024] S4: Pour concrete into the concrete protection layer cavity and the concrete shear wall cavity until it solidifies;

[0025] S5: Loosen the tension nut, remove the steel pipe, screw the tension anchor bolt out of the connecting block, remove the templates on both sides, and the above removed parts can be reused;

[0026] S6: Fill the holes at the connecting block with foaming agent, and apply a plastering layer at both ends of the concrete layer.

[0027] The advantages of this invention are:

[0028] This thermal insulation wall structure with a push-in fit uses connecting pieces with special structures and the thermal insulation board body. This connecting piece is installed on the thermal insulation board body. Different from the insertion splicing method of the existing thermal insulation boards, this thermal insulation board body adopts a push-in fit method, which reduces the inconvenience of inserting and splicing thermal insulation boards. Moreover, the dovetail structure of this thermal insulation board body can effectively prevent the up and down movement of the thermal insulation board body after fitting. And once fitted, the two thermal insulation board bodies cannot be separated by external forces in the left and right directions. The connecting bridge can limit the displacement of the thermal insulation board body in the pushing direction after fitting. After pre-tightening with the tension anchor bolt, the entire framework is in a fixed state.

[0029] The first connecting bridge adopts a three-section structure and can be disassembled after the concrete pouring and solidification, which is beneficial to the reuse of materials and avoids waste.

[0030] The surface of the insulation board body is provided with dovetail grooves, which can increase the bite force between the insulation board body and the concrete layer.

[0031] The surface of the insulation board body is provided with a first plastering layer, and the surface of the first plastering layer is provided with a second plastering layer, which can prevent chemical corrosion and combustion, etc., and protect the insulation board body.

[0032] The through hole A on the injection molded card A can allow the support plate to pass through, but not the injection molded plate C. The through hole B on the injection molded card B can allow the connecting block to pass through, but not the injection molded plate C. This structure can prevent the connecting parts from further displacement after being assembled, align the steel bars of the first connecting bridge and the second connecting bridge, and align the end faces of the connecting block and the support plate. The whole part from the upper end face of the steel bar to the injection molded plate D corresponds to the concrete shear wall, the part from the injection molded plate D to the injection molded plate A corresponds to the insulation board body, and the part from the injection molded plate A to the lower end face of the steel bar corresponds to the concrete protective layer. Description of the Drawings

[0033] Figure 1 It is the upper view of the connecting part;

[0034] Figure 2 It is the isometric view of the connecting part;

[0035] Figure 3 It is the upper view of the first connecting bridge;

[0036] Figure 4 It is the upper view of the second connecting bridge;

[0037] Figure 5 It is the schematic diagram of the injection molded plate A and the injection molded plate C, and the injection molded plate D and the injection molded plate B fixed by clamping;

[0038] Figure 6 It is the schematic diagram of the structure of the insulation board body;

[0039] Figure 7 It is the schematic diagram of the dovetail structure on the insulation body;

[0040] Figure 8 It is the isometric view of the right-angle insulation board;

[0041] Figure 9 It is the schematic diagram of the structure of the insulation board cut and split;

[0042] Figure 10 It is the schematic diagram of the structure when the insulation board bodies are connected;

[0043] Figure 11 It is the upper view of the insulation board body;

[0044] Figure 12 It is the schematic diagram of the plastering layer structure of the insulation board body;

[0045] Figure 13 Schematic diagram of assembling the insulation board body for installing the connecting piece;

[0046] Figure 14 Schematic diagram of the insulation wall frame without cast concrete;

[0047] Figure 15 Schematic diagram of the insulation wall frame with cast concrete;

[0048] Figure 16 Schematic diagram of wall processing after concrete solidification.

[0049] 1. Insulation board body, 11. Concave dovetail, 12. Convex dovetail 11, 13. Hole, 14. Dovetail groove, 15. First plastering layer, 121. Lower base of trapezoid, 122. Upper base of trapezoid, 123. Height of trapezoid;

[0050] 2. Connecting piece, 21. First connecting bridge, 211. Injection molding shell A, 212. Injection molding plate A, 213. Injection molding plate B, 214. Connecting block, 215. Through hole A, 22. Second connecting bridge, 221. Injection molding shell B, 222. Injection molding plate C, 223. Injection molding outer plate D, 224. Support plate, 225. Through hole B, 23. Steel bar, 24. Tie rod anchor bolt, 241. Thread structure, 242. Tie nut;

[0051] 3. Concrete shear wall;

[0052] 4. Concrete protective layer;

[0053] 5. Formwork;

[0054] 6. Steel bar mesh;

[0055] 7. Iron pipe. Detailed implementation manners

[0056] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0058] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0060] The thermal insulation board connector includes steel bars and tension bolts, and comprises a first connecting bridge and a second connecting bridge;

[0061] The first connecting bridge consists of three sections. Threaded structures are provided on the upper and lower sections of the steel bar, and tension nuts are installed. Threaded structures are provided at both ends of the middle section of the steel bar. The upper and lower sections are connected to the middle section through connecting blocks, and threaded structures are provided inside the connecting blocks. An injection molded housing A is provided on the steel bar in the middle section of the first connecting bridge. An injection molded plate A is provided at the upper end of the injection molded housing A, and an injection molded plate B is provided at the lower end. A through hole A is provided on the injection molded plate A. The upper connecting block is 160 mm - 200 mm away from the upper end of the injection molded housing A, and the lower connecting block is 50 mm away from the lower end of the injection molded housing A;

[0062] Support plates are provided at both ends of the steel bar of the second connecting bridge. An injection molded housing B is provided on the steel bar. An injection molded plate C is provided at the upper end of the injection molded housing B, and an injection molded plate D is provided at the lower end. A through hole B is provided on the injection molded plate D. The upper support plate is 160 mm - 200 mm away from the upper end of the injection molded housing B, and the lower support plate is 50 mm away from the lower end of the injection molded housing B;

[0063] Injection molded shell A and injection molded shell B are installed on the holes around the insulation board body, the second connecting bridge is inserted into the first connecting bridge, through hole B passes through the lower end connecting block, the upper end support plate passes through through hole A, injection molded plate B is attached to injection molded plate D, and injection molded plate C is attached to injection molded plate A; the diameter of the steel bar is 8mm, the thickness of injection molded plate A, injection molded plate B, injection molded plate C, injection molded plate and installation package is 8mm, the connecting block can pass through through hole B, and injection molded plate B cannot pass through through hole B, the support plate can pass through through hole A, and injection molded plate C cannot pass through through hole A. The cross-section of through hole A and through hole B is a square with a side length of 40 mm or a circle with a radius of 20 mm, the cross-section of injection molded plate B and injection molded plate C is a square with a side length of 60 mm or a circle with a radius of 30 mm, the cross-section of support plate and connecting block is a square with a side length of 40 mm or a circle with a radius of 30 mm, injection molded shell A is installed on the holes on the upper side and left side of the insulation board body, injection molded shell B is installed on the lower side and right side of the insulation board body, or injection molded shell B is installed on the holes on the upper side and left side of the insulation board body, injection molded shell A is installed on the lower side and right side of the insulation board body, the length of injection molded shell A and injection molded shell B is 2 mm smaller than the thickness of the insulation board body, the thickness of the insulation board body is 80 mm to 100 mm, injection molded plate A and injection molded plate C, injection molded plate D and injection molded plate B are fixed by snap fasteners.

[0064] After the connector is pushed into place, Figure 12 The arrow direction below is the push-in direction of the insulation board body. After the fit is completed, the push-in direction is limited, but the opposite direction of the push-in direction can still be moved, and can be further fixed by snapping, such as Figure 4 The injection molding plate A and the injection molding plate C, and the injection molding plate D and the injection molding plate B shown can be fixed by snapping, for example Figure 4 shown.

[0065] Reference Figures 6 - 12 A dovetail groove is arranged on the surface of the insulation board body, and a dovetail structure is arranged around the insulation board body. The dovetail structure includes a convex dovetail and a concave dovetail. The convex dovetail and the concave dovetail are alternately distributed around the insulation board body, and the convex dovetail and the concave dovetail are arranged with holes.

[0066] The height of the thermal insulation board body 1 is 2.5 - 3m, the width is 0.9 - 1.2m, and the weight of the thermal insulation board body 1 is equivalent to 3 - 4 times that of the current one. When pouring concrete, the weight of the thermal insulation board body 1 is greater than the buoyancy generated by the concrete. A plurality of dovetail structures are equidistantly arranged on the four side walls of the thermal insulation board body 1. Convex dovetails 11 corresponding to the concave dovetails 12 are provided on the four side walls of the thermal insulation board body 1. According to the settings of the height and length of the thermal insulation board body 1, the bottom length of the convex dovetail 11 is 30cm, the top length is 15cm, and the length of the convex dovetail 11 corresponds to the length of the concave dovetail 12. When the thermal insulation board bodies 1 are connected, the left and right forces will be offset, making the connection of the thermal insulation board bodies 1 firm and preventing displacement, ensuring the quality during use. The number of the concave dovetails 12 and the convex dovetails 11 needs to be set according to the height and width of the thermal insulation board body 1. Dovetail grooves 14 are provided on both sides of the thermal insulation board body 1. Setting the dovetail grooves 14 on the surface of the thermal insulation board body 1 will increase the biting effect between the concrete and the thermal insulation board, making the flat-push installation construction easier to operate. When the thermal insulation board body 1 is installed or after the thermal insulation board body 1 is installed and there is still a little distance to the wall, according to the length of the thermal insulation board body 1 from one side of the wall, such as Figure 9 shown, cut one side, and then carry out the dovetail structure connection without generating gaps.

[0067] Move the convex dovetail 11 into the concave dovetail 12 on the thermal insulation board body 1 and install them in sequence. When the thermal insulation board body 1 is installed or after the thermal insulation board body 1 is installed and there is still a little distance to the wall, cut one side according to the thermal insulation board body 1, as Figure 5 shown, make the convex dovetail 11 and the concave dovetail 12 correspond. After completing the remaining installation steps, pour concrete. Since the weight of the thermal insulation board body 1 is greater than that of the ordinary small thermal insulation board body 1, during pouring, the thermal insulation board body 1 will not float upward. At the same time, due to the action of the concave dovetail 12 and the convex dovetail 11, when subjected to the forces on the left and right sides, there will be no separation phenomenon.

[0068] The right-angle thermal insulation board is used for installation at the corner. When installing at the corner, instead of cutting one side and then carrying out the dovetail structure connection, a simple top view of the right-angle thermal insulation board as Figure 13 shown is directly manufactured. The dovetail grooves 14 on the surface of the thermal insulation board body are not shown in the attached drawing. Its bottom is 600mm and its height is 600mm.

[0069] Connectors are installed on the holes 13 of the dovetail structure. This connection device can prevent the thermal insulation board body from moving in the front and rear directions after installation.

[0070] Such as Figure 12As shown in the figure, the insulation board body is assembled from right to left. First, saw off the redundant part of the insulation board body. The sawn-off part is part A shown in the figure. The hole at the dovetail structure on the left side wall at part A is fitted with the injection molding jacket B of the second connecting bridge. The hole at the dovetail structure on the right side wall of the insulation board body at part B is fitted with the injection molding shell A of the first connecting bridge. Push the insulation board body at part B into it to perform dovetail structure fitting and connecting bridge fitting with the insulation board body at part A. Similarly, the hole at the dovetail structure on the left side wall at part B is fitted with the injection molding shell B of the second connecting bridge. The hole at the dovetail structure on the right side wall of the insulation board body at part C is fitted with the injection molding shell A of the first connecting bridge. Push the insulation board body at part C into it to perform dovetail structure fitting and connecting bridge fitting with the insulation board body at part B until the insulation board body is assembled to the specified position, and saw off the redundant dovetail structure. If the specified position is a corner, place a right-angle insulation board for assembly.

[0071] Similarly, the insulation board body can also be assembled from left to right. Then, install the second connecting bridge on the right side wall of the leftmost insulation board body, that is, install the injection molding jacket B on the hole at the dovetail structure on the right side wall, install the injection molding shell A on the left dovetail structure of the inserted wall, and the first connecting bridge is fitted with the second connecting bridge, and the concave dovetail is fitted with the convex dovetail, and install them in sequence from left to right until the insulation board body is assembled to the specified position, and saw off the redundant dovetail structure. If the specified position is a corner, place a right-angle insulation board for assembly.

[0072] For example, after the insulation board body at part A has completed the assembly with the insulation board body at part B, reinforce the steel bars in the cavity of the concrete shear wall on one side of the insulation board body. Place templates at both ends of the connecting piece. The threaded structure on the tension anchor bolt passes through the through hole C on the template and is screwed into the connecting block. Place a square pipe between the tension anchor bolt and the template, and tighten the tension nut. As Figure 14 shown, in the tightened framework, the upper and lower end faces of the connecting block and the support plate have a force acting outward along the steel bar on the inner surface of the template. The tension anchor bolts at the upper and lower ends are pre-tightened and act on the iron pipe, and the iron pipe has a force acting inward along the steel bar on the surface of the template. As Figure 11 shown in the insulation board body, after the insertion is completed, the dovetail structure can limit the displacement in the up and down, left and right directions.

[0073] As Figure 15 shown, pour concrete in the cavity of the concrete protective layer and the cavity of the concrete shear wall until it solidifies.

[0074] As Figure 16 shown, loosen the tension nut, remove the steel pipe, screw the tension anchor bolt out of the connecting block, and remove the templates on both sides. All the above removed parts can be reused.

[0075] As Figure 16As shown, fill the holes at the connecting blocks with foaming agents and apply plaster layers at both ends of the concrete layer.

[0076] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An assembled thermal insulation formwork wall with a dovetail mortise and tenon structure, comprising a thermal insulation board body, a concrete protective layer, a concrete shear wall, steel bars, formwork, iron pipes, tie bolts and connectors, characterized in that a dovetail groove is provided on the surface of the thermal insulation board body, and a dovetail structure is provided around the thermal insulation board body. The dovetail structure includes a convex dovetail and a concave dovetail, and the convex dovetail and the concave dovetail are alternately distributed around the thermal insulation board body. Holes are provided on the convex dovetail and the concave dovetail; the connector includes a first connecting bridge and a second connecting bridge. The first connecting bridge is composed of three sections. Threaded structures are provided on the steel bars at the left and right ends, and tie nuts are installed to form tie bolts. Threaded structures are provided at both ends of the steel bar in the middle section. The left and right sections and the middle section are connected by a connecting block. A threaded structure is provided inside the connecting block. An injection molding shell A is provided on the steel bar in the middle section of the first connecting bridge. An injection molding plate A is provided at the left end of the injection molding shell A, and an injection molding plate B is provided at the right end. A through hole A is provided on the injection molding plate A; support plates are provided at both ends of the steel bar of the second connecting bridge, and an injection molding shell B is provided on the steel bar. An injection molding plate C is provided at the left end of the injection molding shell B, and an injection molding plate D is provided at the right end. A through hole B is provided on the injection molding plate D; the injection molding shell A and the injection molding shell B are installed on the holes around the thermal insulation board body. The second connecting bridge is inserted into the first connecting bridge. The through hole B passes through the connecting block at the right end, the support plate at the left end passes through the through hole A, the injection molding plate B abuts against the injection molding plate D, and the injection molding plate C abuts against the injection molding plate A; the thermal insulation board body is spliced by connectors. Templates are provided at both ends of the connecting block and the support plate in the connectors. The tie bolts are screwed into the connecting block. An iron pipe is placed between the tie bolts and the formwork. The iron pipe is fixed on the formwork. A concrete protective layer is provided in the left cavity of the thermal insulation board body, and a concrete shear wall is provided in the right cavity. Mesh steel bars are provided in the concrete. The connecting block can pass through the through hole B, and the injection molding plate B cannot pass through the through hole B. The support plate can pass through the through hole A, and the injection molding plate C cannot pass through the through hole A.

2. The prefabricated thermal insulation formwork wall with a dovetail mortise and tenon structure according to claim 1, wherein, one side of the thermal insulation board body may also be provided with a dovetail groove, and the other side is provided with a first plastering layer, and the thickness of the first plastering layer is 25 - 30 mm.

3. The prefabricated thermal insulation formwork wall with a dovetail mortise and tenon structure according to claim 2, characterized in that, a second plastering layer is provided on the surface of the first plastering layer, and the sum of the thickness of the surface of the first plastering layer and the thickness of the second plastering layer reaches 50 mm.

4. The prefabricated thermal insulation formwork wall with a dovetail mortise and tenon structure as claimed in claim 1, wherein, through hole C corresponding to the first connecting bridge is provided on the formwork.

5. The prefabricated thermal insulation formwork wall with a dovetail mortise and tenon structure according to claim 3 or 4, characterized in that, the cross sections of the injection molding plate B and the injection molding plate C are squares with a side length of 60 mm or circles with a radius of 30 mm.

6. The application method of an assembled thermal insulation formwork wall with a dovetail mortise and tenon structure according to any one of claims 1-5, characterized in that, including the following steps: S1: Install the injection molding shell A of the first connecting bridge on the hole on one side of the thermal insulation board body, and install the injection molding shell B of the second connecting bridge on the hole on the other side of the thermal insulation board body; S2: After fixing one thermal insulation board body, push another thermal insulation board body into the fixed thermal insulation board body. During the pushing process, the second connecting bridge cooperates with the first connecting bridge, that is, the second connecting bridge is inserted into the first connecting bridge. The through hole B passes through the connecting block at the right end, the support plate at the left end passes through the through hole A, the injection molding plate B abuts against the injection molding plate D, the injection molding plate C abuts against the injection molding plate A, and the convex dovetail cooperates with the concave dovetail; S3: Reinforce steel bars in the shear wall cavity of the concrete layer of the insulation board body. Place formwork at both ends of the connecting piece. The threaded structure on the tension anchor bolt passes through the through hole C on the formwork and is screwed into the connecting block. Place a steel pipe between the tension anchor bolt and the formwork, and tighten the tension nut; S4: Pour concrete in the concrete protection layer cavity and the concrete shear wall cavity until it solidifies; S5: Loosen the tension nut, remove the steel pipe, unscrew the tension anchor bolt from the connecting block, and remove the formwork on both sides. All the removed parts can be reused; S6: Fill the holes at the connecting block with foaming agent, and apply a plaster layer at both ends of the concrete layer.

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