Concrete pouring formwork

Abstract

The utility model relates to a concrete pouring formwork which comprises outer formworks, inner formworks and locking structures, a plurality of outer formworks are spliced to form a first annular frame, and first locking holes are formed in the outer formworks. The inner formworks are arranged in the first annular frame and comprise the first inner formworks and the second inner formworks, intervals are formed between the first inner formworks, the first inner formworks are of bent structures, the second inner formworks are arranged between every two adjacent first inner formworks, and second locking holes are formed in the second inner formworks. The locking structure comprises a plurality of locking rods. In the locking state, the clamping blocks are inserted into the clamping grooves, the multiple second inner formworks and the multiple first inner formworks are spliced to form a second annular frame, the locking rods are locked in the first locking holes and the second locking holes, and a pouring cavity is formed between the first annular frame and the second annular frame. In the unlocking state, the locking rod and the second locking hole are unlocked, and the second inner mold plate can move inwards so that the clamping block can be separated from the clamping groove.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a concrete pouring formwork. Background Art

[0002] Building formwork is a temporary support structure, which is a formwork and support for concrete pouring. Building formwork is usually made of metal, wood or other durable materials, and is used to maintain its shape during the pouring and curing of concrete. When the concrete is cured to a certain strength, it can be removed. Furthermore, by combining the outer formwork and the inner formwork, concrete is poured between the outer formwork and the inner formwork, and a cylindrical wall structure can be cast. Such a wall structure can be used as a chimney, water tower, etc. However, when the building formwork needs to be removed, there is a problem that the inner formwork is difficult to remove from the inside of the wall structure.

[0003] The related art discloses a cup-mouth foundation template, which includes an aluminum inner corner template, an aluminum mold side plate, a baffle, an adjusting member and a supporting member. The aluminum inner corner template is placed inside the cup-mouth foundation steel bar, two aluminum mold side plates are arranged between the two aluminum inner corner templates, an adjusting member is arranged between the two aluminum mold side plates, and the baffle is arranged outside the aluminum mold side plates to block the gap between the two aluminum mold side plates. The aluminum inner corner template is connected to the aluminum mold side plates through the aluminum inner corner template buckle, the supporting member is arranged between the two opposite aluminum mold side plates, and the two ends of the supporting member are respectively abutted on the two opposite aluminum mold side plates. However, when removing the template, it is first necessary to adjust the supporting member so that its two ends no longer abut against the aluminum template and then take out the supporting member, and then shorten the distance between the two aluminum mold side plates through the adjusting member so that the aluminum mold side plates can be separated from the aluminum inner corner template, and take out the two aluminum mold side plates connected in multiple directions, and then remove the baffle, and finally remove multiple aluminum inner corner templates. The cup-mouth foundation template is relatively complex in structure, and the disassembly and assembly process is relatively cumbersome. Utility Model Content

[0004] The utility model aims to provide a concrete pouring formwork frame to solve the problems of the related art that the structure is relatively complex and the disassembly and assembly process is relatively cumbersome.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions.

[0006] The utility model provides a concrete casting formwork, which comprises: an outer formwork, which is provided with a plurality of outer formworks, wherein the plurality of outer formworks are spliced ​​to form a first annular frame, wherein the outer formwork is provided with a first locking hole that runs through the outer side surface and the inner side surface thereof; an inner formwork, which is provided in the first annular frame and is provided with a plurality of inner formworks, wherein the inner formworks comprise a first inner formwork and a second inner formwork, wherein a plurality of the first inner formworks are spaced apart, and wherein the first inner formworks are in a bent structure; wherein the second inner formworks are provided between two adjacent first inner formworks, and a buckle structure is provided between the second inner formworks and the first inner formworks, wherein the buckle structure comprises a clamping groove and a clamping block that are respectively provided on the first inner formworks and the second inner formworks, and wherein the second inner formworks are provided with a second locking hole that runs through the outer side surface and the inner side surface thereof; and a locking hole; wherein the locking hole is provided between the first inner formworks and the second inner formworks. A fixed structure, comprising locking rods with the same number as the first locking hole or the second locking hole; wherein the concrete casting formwork has a locked state and an unlocked state; in the locked state, the card block is inserted into the card slot so that the first inner template is fixed between two adjacent second inner templates, and a plurality of the second inner templates and a plurality of the first inner templates are spliced ​​to form a second annular frame, and the locking rod is locked in the first locking hole and the second locking hole so that the outer template and the second inner template are relatively fixed, and a casting cavity is formed between the first annular frame and the second annular frame; in the unlocked state, the locking rod is unlocked from the second locking hole, and the second inner template can move inward to disengage the card block from the card slot.

[0007] In some embodiments of the present application, the card slot includes a first card slot and a second card slot; the first inner template includes a first connecting part, a second connecting part and a bending part connecting the first connecting part and the second connecting part; the first connecting part is provided with the first card slot on the inner side surface; the second connecting part is provided with the second card slot on the inner side surface; the card block includes a first card block and a second card block; the second inner template is spliced ​​to two adjacent first inner templates, and the two ends thereof are respectively a first splicing end and a second splicing end; the first card block is connected to the first splicing end, and the second card block is connected to the second splicing end; the first card block is inserted into the first card slot of one of the first inner templates, and the second card block is inserted into the second card slot of another of the first inner templates.

[0008] In some embodiments of the present application, the buckle structure also includes a connecting strip; the connecting strip includes a first connecting strip and a second connecting strip; the first connecting strip connects the first splicing end and the first card block; the second connecting strip connects the second splicing end and the second card block; when the first card block is inserted into the first card slot, the first connecting strip is attached to the inner side surface of the first connecting part; when the second card block is inserted into the second card slot, the second connecting strip is attached to the inner side surface of the second connecting part.

[0009] In some embodiments of the present application, the splicing surface of the second inner template is inclined from the outer side of the second inner template to the inner side of the second inner template, and the size of the inner side surface of the second inner template is larger than the size of the outer side surface of the second inner template; the splicing surface of the first inner template is inclined from the outer side of the first inner template to the inner side of the first inner template, and the size of the inner side surface of the first inner template is smaller than the size of the outer side surface of the first inner template.

[0010] In some embodiments of the present application, the concrete pouring formwork is further provided with a plurality of support members; the support members are arranged in the pouring cavity; one end of the support member abuts against the inner side surface of the outer formwork, and the other end of the support member abuts against the outer side surface of the second inner formwork.

[0011] In some embodiments of the present application, the support member includes a sleeve and two support rods; the sleeve is provided with an internal thread; one end of the support rod is provided with an external thread; the two support rods are respectively screwed to the sleeve; the other end of one support rod abuts against the inner side surface of the outer template, and the other end of the other support rod abuts against the outer side surface of the second inner template.

[0012] In some embodiments of the present application, the locking structure also includes a locking member and a nut seat; the locking member is locked to the locking rod and is arranged on the outer side of the outer template; the nut seat is connected to the second inner template and is arranged on the inner side of the second inner template; a connecting hole is opened on the nut seat, the connecting hole has an internal thread, and the connecting hole is connected to the second locking hole; the locking rod is a screw rod, and the locking rod has an external thread; the locking rod is screwed to the nut seat.

[0013] It can be seen from the above technical solutions that the embodiments of the utility model have at least the following advantages and positive effects:

[0014] In the concrete casting formwork of the embodiment of the utility model, in the locked state, a plurality of outer templates are spliced ​​to form a first annular frame. Since the second inner template is arranged between two adjacent first inner templates, correspondingly, the first inner template is also arranged between two adjacent second inner templates. A plurality of second inner templates and a plurality of first inner templates are staggered and spliced ​​to form a second annular frame. Since the first inner template is a bent structure, the second annular frame can be accurately docked at the corner. An annular casting cavity is formed between the first annular frame and the second annular frame, and concrete is poured into the casting cavity, and the desired wall is formed after solidification. The cooperation between the card slot and the card block ensures that the second inner template can be quickly and accurately connected to the first inner template. The cooperation between the locking rod, the first locking hole and the second locking hole ensures the rigidity and stability of the overall structure, and ensures that the casting cavity has a stable size, so that the wall can be stably formed. The composition structure of the concrete casting formwork is relatively simple.

[0015] In the unlocked state, the second inner template is not limited by the locking rod. Since the concrete is poured between the first annular frame and the second annular frame, the inner space of the wall framed by the second annular frame is available for the second inner template to move. When the second inner template moves inward, the block and the slot gradually move away and finally completely separate. Therefore, when the formwork needs to be removed after the concrete is solidified, it is only necessary to first release the connection between the locking rod and the two locking holes, then pry the second inner template inward, release the connection between the second inner template and the first inner template, and then take the second inner template and the first inner template out of the wall. Finally, the outer template can be removed. The operation is relatively easy and cumbersome steps are omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0017] Figure 1 FIG. 4 is a schematic structural diagram of a concrete casting formwork according to an exemplary embodiment.

[0018] Figure 2 yes Figure 1 A magnified schematic diagram of area A in the middle.

[0019] Figure 3 yes Figure 1 A schematic structural diagram of multiple second inner templates and multiple first inner templates in another state.

[0020] Figure 4 yes Figure 3 A schematic diagram of the specific structure of the second inner template and the first inner template.

[0021] Figure 5 yes Figure 1 A schematic diagram of the specific structure of the second inner template and the first inner template in another embodiment.

[0022] Figure 6 yes Figure 1 A schematic diagram of the specific structure of the second inner template and the first inner template in another embodiment.

[0023] Figure 7 yes Figure 1 Schematic diagram of the structure of the support member.

[0024] The reference numerals are described as follows: 1, outer template; 11, first locking hole;

[0025] 2. first inner template; 21. first connecting portion; 210. slot; 211. first slot; 212. third splicing end; 22. second connecting portion; 221. second slot; 222. fourth splicing end; 23. bending portion;

[0026] 3. Second inner template; 30. Card block; 31. First splicing end; 32. Second splicing end; 33. First card block; 34. Second card block; 35. First connecting strip; 36. Second connecting strip; 37. Second locking hole;

[0027] 41. Locking rod; 42. Nut seat;

[0028] 5. Casting cavity;

[0029] 6. Support member; 61. Sleeve; 62. Support rod. DETAILED DESCRIPTION

[0030] Although the present invention can be easily embodied as embodiments of different forms, only some of the specific embodiments are shown in the drawings and described in detail in this specification. It should be understood that this description should be regarded as an exemplary description of the principles of the present invention and is not intended to limit the present invention to that described herein.

[0031] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0032] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the utility model are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0033] See also Figures 1 to 7The concrete casting formwork provided by an embodiment of the utility model mainly includes an outer formwork 1, an inner formwork, and a locking structure. The outer formwork 1 is provided with a plurality of outer formworks 1, and the plurality of outer formworks 1 are spliced ​​to form a first annular frame. The outer formwork 1 is provided with a first locking hole 11 that runs through the outer side and the inner side thereof. The inner formwork is arranged in the first annular frame and is provided with a plurality of inner formworks, including a first inner formwork 2 and a second inner formwork 3. There is a gap between the plurality of first inner formworks 2, and the first inner formwork 2 is in a bent structure. The second inner formwork 3 is arranged in the first annular frame and is provided with a plurality of second inner formworks 3. The second inner formwork 3 is arranged between two adjacent first inner formworks 2, and there is a buckle structure between the second inner formwork 3 and the first inner formwork 2. The buckle structure includes a clamping groove 210 and a clamping block 30 respectively provided on the first inner formwork 2 and the second inner formwork 3, and the second inner formwork 3 is provided with a second locking hole 37 that runs through the outer side and the inner side thereof. The locking structure includes a locking rod 41 having the same number as the first locking hole 11 or the second locking hole 37. Among them, the concrete casting formwork has a locked state and an unlocked state. In the locked state, the block 30 is inserted into the slot 210, so that the first inner template 2 is fixed between two adjacent second inner templates 3, and multiple second inner templates 3 and multiple first inner templates 2 are spliced ​​to form a second annular frame, and the locking rod 41 is locked in the first locking hole 11 and the second locking hole 37, so that the outer template 1 and the second inner template 3 are relatively fixed, and a casting cavity 5 is formed between the first annular frame and the second annular frame. In the unlocked state, the locking rod 41 is unlocked from the second locking hole 37, and the second inner template 3 can move inward to disengage the block 30 from the slot 210.

[0034] In the concrete casting formwork of the embodiment of the utility model, in the locked state, a plurality of outer templates 1 are spliced ​​to form a first annular frame. Since the second inner template 3 is arranged between two adjacent first inner templates 2, correspondingly, the first inner template 2 is also arranged between two adjacent second inner templates 3. A plurality of second inner templates 3 and a plurality of first inner templates 2 are staggered and spliced ​​to form a second annular frame. Since the first inner template 2 is a bent structure, the second annular frame can be accurately docked at the corner. A ring-shaped casting cavity 5 is formed between the first annular frame and the second annular frame. Concrete is poured into the casting cavity 5, and the desired wall is formed after solidification. The cooperation between the card slot 210 and the card block 30 ensures that the second inner template 3 can be quickly and accurately connected to the first inner template 2. The cooperation between the locking rod 41, the first locking hole 11 and the second locking hole 37 ensures the rigidity and stability of the overall structure, and ensures that the casting cavity 5 has a stable size, so that the wall can be stably formed, and the composition structure of the concrete casting formwork is relatively simple.

[0035] In the unlocked state, the second inner template 3 is not limited by the locking rod 41. Since the concrete is poured between the first annular frame and the second annular frame, the inner space of the wall framed by the second annular frame can be used for the second inner template 3 to move. When the second inner template 3 moves inward, the block 30 and the slot 210 gradually move away and finally completely separate. Therefore, when the formwork needs to be removed after the concrete is solidified, it is only necessary to first release the connection between the locking rod 41 and the two locking holes, and then pry the second inner template 3 inward to release the connection between the second inner template 3 and the first inner template 2, and then take the second inner template 3 and the first inner template 2 out of the wall. Finally, the outer template 1 can be removed, which is relatively easy to operate and saves cumbersome steps.

[0036] In this embodiment, the first inner template 2 is an L-shaped structure, the outer template 1, the second inner template 3, the first inner template 2 and the locking structure are each provided in four, and the first annular frame and the second annular frame are both square.

[0037] In other embodiments, the number of the outer formwork 1, the second inner formwork 3, the first inner formwork 2 and the locking structure can also be three, five, six, etc. For example, when the number of the above components and structures is three, the first inner formwork 2 is a V-shaped structure, and the angle of the V-shaped structure is 60 degrees. When the number of the above components and structures is five, the first inner formwork 2 is a V-shaped structure, and the angle of the V-shaped structure is 108 degrees. When the number of the above components and structures is six, the first inner formwork 2 is a V-shaped structure, and the angle of the V-shaped structure is 120 degrees. Specifically, the specific structure of the first inner formwork 2 can be designed according to actual construction requirements. Figure 1 This is only a common structure of the concrete pouring formwork of the embodiment of the present utility model, but it is not limited to this.

[0038] See also Figure 3 and Figure 4 , the card slot 210 includes a first card slot 211 and a second card slot 221. The first inner template 2 includes a first connecting portion 21, a second connecting portion 22, and a bending portion 23 connecting the first connecting portion 21 and the second connecting portion 22. A first card slot 211 is provided on the inner side surface of the first connecting portion 21. A second card slot 221 is provided on the inner side surface of the second connecting portion 22. The card block 30 includes a first card block 33 and a second card block 34. The two ends of the second inner template 3 spliced ​​to the two adjacent first inner templates 2 are respectively a first splicing end 31 and a second splicing end 32. The first card block 33 is connected to the first splicing end 31, and the second card block 34 is connected to the second splicing end 32. The first card block 33 is inserted into the first card slot 211 of a first inner template 2, and the second card block 34 is inserted into the second card slot 221 of another first inner template 2.

[0039] The first clamping block 33 is inserted into the first clamping slot 211 of a first inner template 2, and the second clamping block 34 is inserted into the second clamping slot 221 of another first inner template 2, thereby completing the splicing between the second inner template 3 and the two first inner templates 2. Specifically, multiple groups of the above-mentioned splicing are formed between multiple second inner templates 3 and multiple first inner templates 2, thereby forming a second annular frame. Further, the first clamping slot 211 and the second clamping slot 221 are opened on the inner side surface of the first inner template 2. In the unlocked state, the second inner template 3 is pried inward, and the first clamping block 33 and the second clamping block 34 move inward and exit the first clamping slot 211 and the second clamping slot 221. Since the position of the buckle structure does not contact the poured concrete, it is ensured that the clamping slot 210 and the clamping block 30 can be separated smoothly.

[0040] In other embodiments, please refer to Figure 5 , the first card slot 211 and the second card slot 221 can be both provided on the outer side of the second inner template 3, and the first card block 33 and the second card block 34 are respectively connected to the two joint ends of the first inner template 2. To ensure that the subsequent pouring is not affected, when the first card block 33 is inserted into the first card slot 211 and the second card block 34 is inserted into the first card slot 211, the first card block 33 is flush with the outer side of the second inner template 3, and the first card block 33 is flush with the outer side of the second inner template 3.

[0041] Alternatively, the first clamping groove 211 is provided on the outer side surface of the second inner template 3, the first clamping block 33 is connected to a splicing end of the first inner template 2, the second clamping groove 221 is provided on the inner side surface of the first inner template 2, and the second clamping block 34 is connected to a splicing end of the second inner template 3. To ensure that subsequent pouring is not affected, when the first clamping block 33 is inserted into the first clamping groove 211, the first clamping block 33 is flush with the outer side surface of the second inner template 3.

[0042] In this embodiment, the two ends of the first inner template 2 spliced ​​to the two adjacent second inner templates 3 are respectively the third splicing end 212 and the fourth splicing end 222. The third splicing end 212 is provided at the first connecting portion 21. The fourth splicing end 222 is provided at the second connecting portion 22. Specifically, the first splicing end 31 is spliced ​​to the third splicing end 212 of a first inner template 2, and the second splicing end 32 is spliced ​​to the fourth splicing end 222 of another first inner template 2.

[0043] In a further embodiment, the first splicing end 31 is provided with a first step portion, the second splicing end 32 is provided with a second step portion, the third splicing end 212 is provided with a third step portion, and the fourth splicing end 222 is provided with a third step portion. When the first splicing end 31 is spliced ​​to the third splicing end 212, the first step portion overlaps the third step portion, and when the second splicing end 32 is spliced ​​to the fourth splicing end 222, the third step portion overlaps the fourth step portion. The provision of the step portion increases the contact area between the splicing ends, increases the stability of the connection, and can enhance the sealing performance of the splicing. In a further embodiment, the first step portion is provided above the third step portion, the second step portion is provided above the fourth step portion, and the step portions provided on the second inner template 3 are all provided above the step portions provided on the first inner template 2. When the second inner template 3 is pried inward, the step portions can be quickly separated, and the operation is relatively easy.

[0044] See also Figures 2 to 6 , the buckle structure also includes a connecting strip. The connecting strip includes a first connecting strip 35 and a second connecting strip 36. The first connecting strip 35 connects the first splicing end 31 and the first clamping block 33. The second connecting strip 36 connects the second splicing end 32 and the second clamping block 34. When the first clamping block 33 is inserted into the first clamping groove 211, the first connecting strip 35 is attached to the inner side surface of the first connecting part 21. When the second clamping block 34 is inserted into the second clamping groove 221, the second connecting strip 36 is attached to the inner side surface of the second connecting part 22. The design of the connecting strip further enhances the connection strength and stability between the second inner template 3 and the first inner template 2, and can prevent the second inner template 3 or the first inner template 2 from being displaced during the casting process.

[0045] See also Figures 1 to 6 , the splicing surface of the second inner template 3 is inclined from the outer side of the second inner template 3 to the inner side of the second inner template 3, and the size of the inner side surface of the second inner template 3 is larger than the size of the outer side surface of the second inner template 3, and the splicing surface of the first inner template 2 is inclined from the outer side of the first inner template 2 to the inner side of the first inner template 2, and the size of the inner side surface of the first inner template 2 is smaller than the size of the outer side surface of the first inner template 2. The splicing surface of the second inner template 3 is inclined, and correspondingly, the splicing surface of the first inner template 2 is also inclined, which increases the contact area between the second inner template 3 and the first inner template 2 and enhances the stability of the structure. Further, since the size of the inner side surface of the second inner template 3 is larger than the size of the outer side surface, it is ensured that when the second inner template 3 is pried inward, the feasibility of the second inner template 3 being able to move inward is ensured, and when the second inner template 3 is pried inward, it acts on the outer side surface with a small force area, and the second inner template 3 and the first inner template 2 are easier to separate, which is more labor-saving in operation.

[0046] See also Figure 1The concrete casting formwork is also provided with a plurality of support members 6. The support members 6 are provided in the casting cavity 5. One end of the support member 6 abuts against the inner side of the outer formwork 1, and the other end of the support member 6 abuts against the outer side of the second inner formwork 3. The support members 6 provide additional support, enhance the stability and bearing capacity of the formwork, help prevent the outer formwork 1 and the second inner formwork 3 from deforming during the concrete casting process, ensure the stable formation of the wall structure, and ensure the dimensional accuracy of the casting cavity 5.

[0047] See also Figure 7 The support member 6 includes a sleeve 61 and two support rods 62. The sleeve 61 is provided with an internal thread. One end of the support rod 62 is provided with an external thread. The two support rods 62 are respectively screwed to the sleeve 61. The other end of one support rod 62 abuts against the inner side of the outer template 1, and the other end of the other support rod 62 abuts against the outer side of the second inner template 3. The length of the support member 6 can be adjusted by screwing to meet the casting requirements of casting cavities 5 of different sizes. The adjustability of the support member 6 increases the flexibility and versatility of the formwork.

[0048] See also Figure 1 , the locking structure also includes a stopper and a nut seat 42. The stopper is locked to the locking rod 41 and is arranged on the outer side of the outer template 1. The nut seat 42 is connected to the second inner template 3 and is arranged on the inner side of the second inner template 3. A connecting hole is provided on the nut seat 42, the connecting hole has an internal thread, and the connecting hole is connected to the second locking hole 37. The locking rod 41 is a screw rod, and the locking rod 41 has an external thread. The locking rod 41 is screwed to the nut seat 42. The screw connection structure formed between the locking rod 41 and the nut seat 42 provides a reliable locking method, ensures the stability of the formwork during the pouring process, and facilitates the installation and disassembly of the locking rod 41, thereby improving the convenience and safety of construction. In this embodiment, the stopper and the nut seat 42 are respectively limited from the outer side of the outer template 1 and the inner side of the second inner template 3, and the support member 6 is limited from the inner side of the outer template 1 and the outer side of the second inner template 3. In other embodiments, an outer nut seat is also provided on the outer side of the outer template 1, and the locking rod 41 is locked to the outer nut seat.

[0049] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A concrete pouring formwork, characterized in that: include: There are multiple outer templates, and the multiple outer templates are spliced ​​to form a first annular frame. The outer template is provided with a first locking hole that passes through the outer side and the inner side thereof; An inner template is arranged in the first annular frame, and is provided with a plurality of inner templates, the inner templates include a first inner template and a second inner template, a plurality of the first inner templates are spaced apart, the first inner template is in a bent structure, the second inner template is arranged between two adjacent first inner templates, and a buckle structure is provided between the second inner template and the first inner template, the buckle structure includes a clamping groove and a clamping block respectively provided on the first inner template and the second inner template, and the second inner template is provided with a second locking hole penetrating through the outer side surface and the inner side surface thereof; A locking structure comprising locking rods having the same number as the first locking holes or the second locking holes; Wherein, the concrete pouring formwork has a locked state and an unlocked state; In the locked state, the clamping block is inserted into the clamping slot so that the first inner template is fixed between two adjacent second inner templates, and a plurality of the second inner templates and a plurality of the first inner templates are spliced ​​to form a second annular frame, and the locking rod is locked in the first locking hole and the second locking hole so that the outer template and the second inner template are relatively fixed, and a casting cavity is formed between the first annular frame and the second annular frame; In the unlocked state, the locking rod and the second locking hole are unlocked, and the second inner template can move into the second annular frame to allow the clamping block to be separated from the clamping slot.

2. The concrete pouring formwork according to claim 1, characterized in that: The card slot includes a first card slot and a second card slot; The first inner template includes a first connecting portion, a second connecting portion, and a bending portion connecting the first connecting portion and the second connecting portion; The first card slot is formed on the inner side surface of the first connecting portion; The second card slot is formed on the inner side surface of the second connecting portion; The card block includes a first card block and a second card block; The two ends of the second inner template spliced ​​to the two adjacent first inner templates are respectively a first splicing end and a second splicing end; The first card block is connected to the first splicing end, and the second card block is connected to the second splicing end; The first card block is inserted into a first card slot of one of the first inner templates, and the second card block is inserted into a second card slot of another of the first inner templates.

3. The concrete pouring formwork according to claim 2, characterized in that: The buckle structure also includes a connecting strip; The connecting strips include a first connecting strip and a second connecting strip; The first connecting strip connects the first splicing end and the first clamping block; The second connecting strip connects the second splicing end and the second clamping block; When the first card block is inserted into the first card slot, the first connecting strip is attached to the inner side surface of the first connecting portion; When the second card block is inserted into the second card slot, the second connecting strip is attached to the inner side surface of the second connecting portion.

4. The concrete pouring formwork according to claim 1, characterized in that: The joint surface of the second inner template is inclined from the outer side of the second inner template to the inner side of the second inner template, and the size of the inner side surface of the second inner template is larger than the size of the outer side surface of the second inner template; The joint surface of the first inner template is inclined from the outer side of the first inner template to the inner side of the first inner template, and the size of the inner side surface of the first inner template is smaller than the size of the outer side surface of the first inner template.

5. The concrete pouring formwork according to claim 1, characterized in that: A plurality of support members are also provided; The support member is disposed in the casting cavity; One end of the support member abuts against the inner side surface of the outer template, and the other end of the support member abuts against the outer side surface of the second inner template.

6. The concrete pouring formwork according to claim 5, characterized in that: The support member comprises a sleeve and two support rods; The sleeve is provided with an internal thread; One end of the support rod is provided with an external thread; The two support rods are respectively screwed to the sleeve; The other end of one of the support rods abuts against the inner side surface of the outer template, and the other end of the other support rod abuts against the outer side surface of the second inner template.

7. The concrete pouring formwork according to claim 5, characterized in that: The locking structure also includes a stopper and a nut seat; The anti-slip member is locked to the locking rod and is arranged on the outer side of the outer template; The nut seat is connected to the second inner template and is arranged on the inner side of the second inner template; The nut seat is provided with a connecting hole, the connecting hole has an internal thread, and the connecting hole is connected to the second locking hole; The locking rod is a screw rod, and the locking rod has an external thread; The locking rod is threadedly connected to the nut seat.

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