A device for sealing a formwork joint

Abstract

This application relates to the field of building construction technology and provides a sealing device for the bottom joint of a formwork, comprising a first abutting component, a second abutting component, a telescopic rod, and a roll-up mechanism; the first abutting component is used to connect to the ground, the second abutting component is used to abut against the bottom wall of the formwork, one end of the telescopic rod is connected to the first abutting component, and the other end is connected to the second abutting component; the roll-up mechanism includes a frame and a rotating roller, the frame is used to connect to the formwork, and the rotating roller is rotatably connected to the frame; a sealing film is wound around the rotating roller, and the end of the sealing film is connected to the first abutting component. This application has the effect of shortening the construction cycle of wall pouring.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building construction technology, in particular to a formwork bottom joint sealing device. BACKGROUND

[0002] When pouring a concrete wall, a formwork needs to be installed first. The formwork has a bottom joint with the ground. In order to prevent the cement slurry from flowing out of the bottom joint, the bottom joint needs to be sealed with cement mortar. However, after the cement mortar is set in the bottom joint, the subsequent pouring of concrete cannot be carried out until the cement mortar solidifies, resulting in a long construction period for pouring the wall. SUMMARY

[0003] In order to shorten the construction period for pouring the wall, the present application provides a formwork bottom joint sealing device.

[0004] The formwork bottom joint sealing device provided by the present application adopts the following technical solution:

[0005] A formwork bottom joint sealing device, comprising a first abutting component, a second abutting component, an extension rod and a unwinding mechanism; the first abutting component is used to be connected with the ground, the second abutting component is used to abut with the bottom wall of the formwork, one end of the extension rod is connected to the first abutting component, and the other end is connected to the second abutting component; the unwinding mechanism comprises a frame body and a rotating roller, the frame body is used to be connected with the formwork, and the rotating roller is rotatably connected to the frame body; the rotating roller is wound with a sealing film, and the end of the sealing film is connected to the first abutting component.

[0006] By adopting the above technical solution, after the formwork is installed, the first abutting component is connected to the ground below the formwork, and the unwinding mechanism is connected to the outer surface of the formwork. Then the length of the extension rod is adjusted, the second abutting component is adjusted towards the bottom wall of the formwork, until a gap for the sealing film to pass through is formed between the second abutting component and the bottom wall of the formwork, and then the rotating roller is adjusted to tighten the sealing film. After that, the extension rod is adjusted so that the second abutting component tightly abuts against the bottom wall of the formwork, thereby sealing the bottom joint of the formwork with the sealing film. After the sealing device is installed, the wall concrete can be immediately poured, thereby shortening the construction period for pouring the concrete wall.

[0007] Optionally, the sealing film comprises a first film and a second film, the first film and the second film are overlapped, and the first film is used to abut with the concrete for pouring the wall; the second film is provided with a first air hole, and the second film is provided with a first sealing member for opening and closing the first air hole.

[0008] By adopting the technical scheme, after the plugging device is installed, the first gas hole is opened by the first plugging piece, gas is introduced between the first membrane and the second membrane, and the first membrane is lifted by the gas, so that the sealing performance of the first membrane to the bottom joint is enhanced, and the risk of cement mortar overflowing from the bottom joint is reduced.

[0009] Optionally, the first membrane is provided with a second gas hole, a gas pipe is connected to a surface of the first membrane facing the second membrane, and the gas pipe penetrates through the second membrane; the gas pipe is provided with a second plugging piece, the second plugging piece is filled in the gas pipe, and the second plugging piece is used to open and close the second gas hole.

[0010] By adopting the technical scheme, when the formwork is removed, the first plugging piece is removed from the second membrane, the gas between the second membrane and the first membrane is discharged by the negative pressure equipment, then the second plugging piece is removed from the gas pipe, gas is introduced between the first membrane and the wall, and the first membrane is lifted from the wall by the gas, so that the demolding of the plugging device is facilitated.

[0011] Optionally, the gas pipe is connected to an end of the first membrane and has a first plugging piece, the second gas hole is arranged in the first plugging piece, and the gas pipe penetrates out of the first gas hole; the second plugging piece is a gas pipe with one end closed, the second plugging piece is rotationally connected to the gas pipe and abuts against an inner wall of the gas pipe, the first plugging piece is used to open and close a port of the second plugging piece, the second plugging piece has a second plugging piece, the second plugging piece is used to abut against the first plugging piece, the second plugging piece is provided with a first through hole, a side wall of the gas pipe is provided with a third gas hole, and a side wall of the second plugging piece is provided with a second through hole; when the second through hole and the third gas hole are communicated, the second plugging piece blocks the second gas hole; and when the first through hole and the second gas hole are communicated, the side wall of the second plugging piece blocks the third gas hole.

[0012] By adopting the technical scheme, by rotating the second plugging piece relative to the gas pipe, whether the third gas hole is communicated with the second through hole is controlled, when the third gas hole is communicated with the second through hole, the second plugging piece blocks the second gas hole, and gas is introduced between the first membrane and the second membrane; by rotating the second plugging piece relative to the gas pipe, whether the second gas hole is communicated with the first through hole is controlled, when the second gas hole is communicated with the first through hole, the side wall of the second plugging piece blocks the third gas hole, at this time, gas can be introduced between the first membrane and the wall, and the plugging device is demolded; during pouring of the wall concrete, by rotating the second plugging piece relative to the gas pipe, the second plugging piece blocks the second gas hole, and the side wall of the second plugging piece blocks the third gas hole, and the first membrane is lifted by the gas between the first membrane and the second membrane.

[0013] Optionally, the second abutting assembly comprises a first connecting seat and a first guide roller, the first connecting seat is provided with a rolling groove, the first guide roller is located in the rolling groove, the central axis of the first guide roller is located in the rolling groove, and the first guide roller is used for abutting with the outer surface of the sealing film.

[0014] By adopting the above technical scheme, the first guide roller is used for guiding the sealing film, so that the movement of the sealing film relative to the second abutting assembly is smoother, and the abrasion of the sealing film during movement is reduced.

[0015] Optionally, the first connecting seat is connected with a first abutting plate, and the first abutting plate is used for abutting with the part of the sealing film located between the ground and the bottom wall of the formwork.

[0016] By adopting the above technical scheme, the first abutting plate provides certain support for the sealing film, and the risk of deformation of the sealing film during pouring of the wall concrete is reduced.

[0017] Optionally, the first abutting plate and the first connecting seat are detachably connected.

[0018] By adopting the above technical scheme, on the one hand, the sealing device is convenient to store and transport, and on the other hand, the first abutting plate with a suitable width can be selected according to the width of the bottom joint, and the use flexibility of the sealing device is improved.

[0019] Optionally, the second abutting assembly further comprises a second connecting seat and a second guide roller, the second connecting seat is used for connecting with the bottom of the formwork, and the second guide roller is rollingly connected to the second connecting seat, and the second guide roller is used for abutting with the outer surface of the sealing film.

[0020] By adopting the above technical scheme, the second guide roller is further used for guiding the sealing film, reducing the scratching of the sealing film by the edge of the formwork, and prolonging the service life of the sealing device.

[0021] Optionally, the sealing film is provided with a plurality of connecting lines, the connecting lines are used for connecting the first film and the second film, the connecting lines are arranged along the length direction of the sealing film, and the plurality of connecting lines are arranged in the width direction of the sealing film.

[0022] By adopting the above technical scheme, the plurality of connecting lines are used for connecting the first film and the second film, reducing the risk of mutual misalignment of the first film and the second film, on the other hand, the space between the first film and the second film is separated by the plurality of connecting lines, so as to facilitate the inflation between the first film and the second film in a divided area, and also facilitate the detection of whether the first film and the second film are damaged, and facilitate the maintenance of the sealing film.

[0023] Optionally, the first abutting assembly comprises a connecting plate and a second abutting plate, the connecting plate is used to be connected with the ground, and the second abutting plate is detachably connected to the connecting plate, and the second abutting plate is used to abut against the part of the sealing film between the ground and the bottom wall of the formwork.

[0024] By adopting the above technical scheme, the second abutting plate is used to provide certain support for the sealing film, so as to reduce the risk of deformation of the sealing film in the process of pouring the wall concrete.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. By arranging the first abutting assembly, the second abutting assembly, the telescopic rod and the sealing film, the distance between the first abutting assembly and the second abutting assembly is adjusted by the telescopic rod, so that the first abutting assembly abuts against the ground, the second abutting assembly abuts against the formwork, and the bottom joint is sealed by the sealing film, so that the wall concrete can be poured immediately after the sealing device is installed, thereby shortening the construction period of the poured concrete wall.

[0027] 2. The sealing film comprises a first film and a second film, the second film is provided with a first air hole and a first sealing member for opening and closing the first air hole, and after the sealing device is installed, the gas is injected between the first film and the second film through the first air hole, and the gas is used to support the second film, thereby further improving the sealing effect of the sealing film on the bottom joint.

[0028] 3. By arranging the second air hole in the first film, when the formwork is removed, the gas is injected between the first film and the wall through the second air hole, and the gas is used to assist in removing the sealing film from the wall, thereby improving the formwork removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of embodiment 1 of the present application.

[0030] Figure 2 is a structural schematic diagram of embodiment 2 of the present application.

[0031] Figure 3 is a distribution schematic diagram of the connecting line of the sealing film in embodiment 2.

[0032] Figure 4 is a structural schematic diagram of embodiment 3 of the present application.

[0033] Explanation of reference signs: 1, first abutting assembly; 11, connecting plate; 12, second abutting plate; 2, second abutting assembly; 21, first connecting seat; 211, rolling groove; 22, first guide roller; 23, first abutting plate; 24, second connecting seat; 25, second guide roller; 3, telescopic rod; 4, unwinding mechanism; 41, frame body; 42, rotating roller; 5, blocking film; 51, first film; 511, second air hole; 512, air pipe; 5121, third air hole; 513, second blocking piece; 5131, second through hole; 514, first blocking piece; 52, second film; 521, first air hole; 522, first blocking piece; 523, second blocking piece; 5231, first through hole; 53, connecting line. DETAILED DESCRIPTION

[0034] The following will be described in detail below with reference to the accompanying drawings. Figures 1-4 The present application is further described in detail.

[0035] Embodiment 1

[0036] The embodiment of the present application discloses a blocking device for template bottom joint. Referring to the drawings Figure 1 The blocking device for template bottom joint comprises a first abutting assembly 1, a second abutting assembly 2, a telescopic rod 3 and an unwinding mechanism 4.

[0037] The first abutting assembly 1 is used for connecting with the ground, the second abutting assembly 2 is used for abutting with the bottom wall of the template, one end of the telescopic rod 3 is connected to the first abutting assembly 1, and the other end is connected to the second abutting assembly 2. The unwinding mechanism 4 comprises a frame body 41 and a rotating roller 42, the frame body 41 is used for connecting with the template, the rotating roller 42 is rotationally connected to the frame body 41, the rotating roller 42 is wound with a blocking film 5, and the end of the blocking film 5 is connected to the first abutting assembly 1.

[0038] After the template is installed, the first abutting assembly 1 is connected to the ground below the template, and the unwinding mechanism 4 is connected to the outer surface of the template; then the length of the telescopic rod 3 is adjusted, the second abutting assembly 2 is adjusted towards the bottom wall of the template, a gap for the blocking film 5 to pass through is formed between the second abutting assembly 2 and the bottom wall of the template, then the rotating roller 42 is adjusted, and the blocking film 5 is tightened by the rotating roller 42; then the telescopic rod 3 is adjusted, so that the second abutting assembly 2 abuts against the bottom wall of the template, so that the bottom joint of the template is blocked by the blocking film 5, and the wall body concrete can be immediately poured after the blocking device is installed, thereby shortening the construction period of the poured concrete wall body.

[0039] Specifically, the telescopic rod 3 can be a manual telescopic rod or an electric telescopic rod, and can be a one-way telescopic rod or a two-way telescopic rod. The telescopic rod 3 is provided in plurality, and the plurality of telescopic rods 3 are arranged in the length direction of the bottom joint.

[0040] The frame body 41 is connected with a driving motor, which is used to drive the rotating roller 42 to rotate, so as to wind and unwind the sealing film 5 and fix the rotating roller 42.

[0041] The first abutting assembly 1 comprises a connecting plate 11 and a second abutting plate 12, the connecting plate 11 is used to be connected with the ground, the second abutting plate 12 is detachably connected with the connecting plate 11, the second abutting plate 12 is used to abut with the part of the sealing film 5 between the ground and the bottom wall of the formwork, and the end of the telescopic rod 3 is connected with the connecting plate 11. When installing the sealing device, the connecting plate 11 is installed on the ground, which can be fixed by bonding, expansion bolt or direct abutting. At the same time, the second abutting plate 12 is abutted on the outer surface of the sealing film 5, which plays a certain supporting role for the sealing film 5.

[0042] In the embodiment, the telescopic rod 3 is detachably connected with the connecting plate 11 by bolts, so as to facilitate the transportation and storage of the sealing device.

[0043] In the embodiment, the connecting plate 11 and the second abutting plate 12 are detachably connected by bolts. In other embodiments, the connecting plate 11 and the second abutting plate 12 can also be detachably connected by other existing quick-release structures. Since the connecting plate 11 and the second abutting plate 12 are detachably connected, the appropriate width of the second abutting plate 12 can be selected according to the width of the gap between the bottom wall of the formwork and the ground, so that the first abutting assembly 1 has higher use flexibility.

[0044] The second abutting assembly 2 comprises a first connecting seat 21 and a first guide roller 22, and the first connecting seat 21 is provided with a rolling groove 211. The first guide roller 22 is located in the rolling groove 211, and the center axis of the first guide roller 22 is located in the rolling groove 211, that is, the first guide roller 22 is rollingly connected with the first connecting seat 21, and the first guide roller 22 is used for the outer surface of the sealing film 5 to abut. Thus, the first guide roller 22 guides the sealing film 5, so that the sealing film 5 moves more smoothly relative to the second abutting assembly 2, and the abrasion of the sealing film 5 during the movement is reduced.

[0045] In the embodiment, the telescopic rod 3 is detachably connected with the first connecting seat 21 by bolts, so as to facilitate the storage and transportation of the sealing device.

[0046] Further, the first connecting seat 21 is connected with a first abutting plate 23, and the first abutting plate 23 is used for abutting with the part of the sealing film 5 between the ground and the bottom wall of the formwork. Thus, the first abutting plate 23 provides a certain support for the sealing film 5, and reduces the risk of deformation of the sealing film 5 in the process of pouring the wall concrete. It can be understood that the first abutting plate 23 and the second abutting plate 12 provide support for the sealing film 5 at the upper and lower positions of the bottom joint respectively, and they do not conflict, and the width of the second abutting plate 12 can be adjusted according to the width of the bottom joint and the width of the first abutting plate 23.

[0047] In the embodiment, the first abutting plate 23 is detachably connected with the first connecting seat 21. The detachable connection can be through bolt connection or through the existing quick release structure. Thus, the use flexibility of the sealing device is further improved, and the sealing device is convenient to store and transport.

[0048] Further, in the embodiment, the second abutting assembly 2 further includes a second connecting seat 24 and a second guide roller 25. The second connecting seat 24 is used for connecting with the bottom of the formwork, and the second guide roller 25 is rollingly connected with the second connecting seat 24. The second guide roller 25 is used for the outer surface of the sealing film 5 to abut. When the sealing film 5 abuts on the first guide roller 22 and the second guide roller 25 and is straightened, there is a gap between the sealing film 5 and the edge of the formwork. Thus, the second guide roller 25 further guides the sealing film 5, reduces the scratching of the sealing film 5 by the edge of the formwork, and further prolongs the service life of the sealing device.

[0049] The second connecting seat 24 is connected with the formwork through a bolt.

[0050] The implementation principle of the embodiment 1 is as follows: in a normal state, the first abutting plate 23 is separated from the first connecting seat 21, the second abutting plate 12 is separated from the connecting plate 11, the telescopic rod 3 is separated from the first connecting seat 21, the telescopic rod 3 is separated from the connecting plate 11, the frame body 41 is separated from the rotating roller 42, the driving motor is separated from the frame body 41, that is, the first abutting plate 23, the first connecting seat 21, the second abutting plate 12, the telescopic rod 3, the frame body 41 and the driving motor are stored separately; and the sealing film 5 together with the connecting plate 11 is wound on the winding roller.

[0051] In the wall construction process, after the complete template is installed, the frame 41 connected with the rotating roller 42 is connected to the template, and the driving motor is connected to the frame 41, and the output shaft of the driving motor is connected with the rotating roller 42; then the second connecting seat 24 connected with the second guide roller 25 is connected to the bottom of the template; then the connecting plate 11 is connected with the second abutting plate 12, the telescopic rod 3 is installed on the connecting plate 11, the end of the telescopic rod 3 away from the connecting plate 11 is connected to the first connecting seat 21, and the first abutting plate 23 is connected to the first connecting seat 21; then the connecting plate 11 is connected to the ground by bolts, and the second abutting plate 12 is located below the template. The outer surface of the sealing film 5 abuts against the first guide roller 22 and the second guide roller 25; then the length of the telescopic rod 3 is adjusted to form a gap between the first guide roller 22 and the bottom wall of the template for the sealing film 5 to pass through; then the driving motor is started, and the driving motor drives the rotating roller 42 to rotate relative to the template, and the sealing film 5 is tightened; finally, the length of the telescopic rod 3 is adjusted so that the first guide roller 22 abuts against the bottom wall of the template, and then the wall concrete can be poured without waiting, thereby improving the construction efficiency and shortening the construction period of the wall pouring.

[0052] Embodiment 2

[0053] With reference to Figure 2 The difference between this embodiment and embodiment 1 is that the sealing film 5 includes a first film 51 and a second film 52, the first film 51 and the second film 52 are overlapped, and the first film 51 is used to abut against the concrete for pouring the wall. The second film 52 is provided with a first air hole 521, and the second film 52 is provided with a first sealing member 522 for opening and closing the first air hole 521. By this design, after the sealing device is installed, the first air hole 521 is opened by the first sealing member 522, gas is introduced between the first film 51 and the second film 52, and the first film 51 is lifted by the gas, thereby enhancing the sealing performance of the first film 51 in sealing the bottom joint and reducing the risk of cement mortar overflowing from the bottom joint.

[0054] With reference to Figure 2 And Figure 3 Further, the sealing film 5 is provided with a plurality of connecting lines 53 for connecting the first film 51 and the second film 52. The connecting lines 53 are arranged along the length direction of the sealing film 5, and the plurality of connecting lines 53 are arranged in the width direction of the sealing film 5. Thus, the first film 51 and the second film 52 are connected by the plurality of connecting lines 53, which reduces the risk of misalignment between the first film 51 and the second film 52. On the other hand, the space between the first film 51 and the second film 52 is divided by the plurality of connecting lines 53, so as to facilitate the inflation of the space between the first film 51 and the second film 52, and also facilitate the detection of whether the first film 51 and the second film 52 are damaged, and facilitate the maintenance of the sealing film 5.

[0055] It can be understood that, in the case of setting multiple connection lines 53 to separate the blocking film 5 into multiple areas, the second film 52 is correspondingly provided with multiple first air holes 521 and multiple first blocking pieces 522, and the multiple first blocking pieces 522 and the multiple first air holes 521 are one-to-one corresponding.

[0056] In the embodiment, the first film 51 and the second film 52 are heat-pressed to form the connection line 53. In other embodiments, the first film 51 and the second film 52 can also be bonded by glue to form the connection line 53.

[0057] Further, the first film 51 is provided with a second air hole 511, and a ventilation pipe 512 is connected to the surface of the first film 51 facing the second film 52. The ventilation pipe 512 penetrates through the second film 52, and the side wall of the ventilation pipe 512 is bonded and fixed with the second film 52. The ventilation pipe 512 is provided with a second blocking piece 513, which is filled in the ventilation pipe 512, and the second blocking piece 513 is used to open and close the second air hole 511. When the mold is removed, the first blocking piece 522 is first removed from the second film 52, and the gas between the second film 52 and the first film 51 is discharged by a negative pressure device; then the second blocking piece 513 is removed from the ventilation pipe 512, and the gas is introduced between the first film 51 and the wall, and the first film 51 is lifted from the wall by the gas, thereby facilitating the demolding of the blocking device.

[0058] It is worth noting that, in order to facilitate operation, in the embodiment, an interval for the ventilation pipe 512 to pass through is left between the first abutting plate 23 and the second abutting plate 12 when the first abutting plate 23 and the abutting plate are installed.

[0059] Embodiment 3

[0060] Reference Figure 4 The difference between the embodiment and the embodiment 2 is that the ventilation pipe 512 is connected to the end of the first film 51 and has a first blocking piece 514, the second air hole 511 is opened in the first blocking piece 514, the ventilation pipe 512 penetrates out of the first air hole 521, and the side wall of the ventilation pipe 512 is bonded and fixed with the part of the second film 52 located at the edge of the first air hole 521.

[0061] The second blocking piece 513 is a gas pipe with one end closed, and is rotatably connected to the ventilation pipe 512 and abuts against the inner wall of the ventilation pipe 512. The first blocking piece 522 is used to open and close the port of the second blocking piece 513 away from the first film 51. The second blocking piece 513 has a second blocking piece 523, which is used to abut against the first blocking piece 514, and the second blocking piece 523 penetrates through to open a first through hole 5231.

[0062] The side wall of the vent pipe 512 is provided with a third air hole 5121, and the side wall of the second blocking piece 513 is provided with a second through hole 5131. When the second through hole 5131 communicates with the third air hole 5121, the second blocking piece 523 blocks the second air hole 511. When the first through hole 5231 communicates with the second air hole 511, the side wall of the second blocking piece 513 blocks the third air hole 5121.

[0063] The principle of the embodiment of the embodiment 3 is that, by rotating the second blocking piece 513 relative to the vent pipe 512, whether the third air hole 5121 communicates with the second through hole 5131 is controlled, and when the third air hole 5121 communicates with the second through hole 5131, the second blocking piece 523 blocks the second air hole 511, so as to facilitate the gas to be introduced between the first film 51 and the second film 52;

[0064] By rotating the second blocking piece 513 relative to the vent pipe 512, whether the second air hole 511 communicates with the first through hole 5231 is controlled, and when the second air hole 511 communicates with the first through hole 5231, the side wall of the second blocking piece 513 blocks the third through hole, at this time, the gas can be filled between the first film 51 and the wall, and the blocking device is helped to demold;

[0065] During the process of pouring the wall concrete, by rotating the second blocking piece 513 relative to the vent pipe 512, the second blocking piece 523 blocks the second air hole 511, and the side wall of the second blocking piece 513 blocks the third through hole, and the first film 51 is supported by the gas between the first film 51 and the second film 52.

[0066] The above are the preferred embodiments of the application, and are not used to limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A sealing device for the bottom seam of a template, characterized in that: The utility model provides a kind of wall sealing film, including first abutment component (1), second abutment component (2), telescopic rod (3) and unwinding mechanism (4);The first abutment component (1) is used to connect with ground, the second abutment component (2) is used to abut with the bottom wall of formwork, one end of the telescopic rod (3) is connected to the first abutment component (1), the other end is connected to the second abutment component (2);The unwinding mechanism (4) includes frame body (41) and rotating roller (42), the frame body (41) is used to connect with the formwork, the rotating roller (42) is rotatably connected to the frame body (41);The rotating roller (42) is wound with sealing film (5), and the end of the sealing film (5) is connected to the first abutment component (1);The sealing film (5) includes first film (51) and second film (52), the first film (51) is overlapped with the second film (52), and the first film (51) is used to abut with the concrete of pouring wall body;The second film (52) is provided with first air hole (521), and the second film (52) is provided with first sealing member (522), and the first sealing member (522) is used to open and close the first air hole (521);The first film (51) is provided with second air hole (511), and the surface of the first film (51) facing the second film (52) is connected with air pipe (512), and the air pipe (512) passes through the second film (52);The air pipe (512) is provided with second sealing member (513), and the second sealing member (513) is filled in the air pipe (512), and the second sealing member (513) is used to open and close the second air hole (511);The end of the air pipe (512) connected to the first film (51) has first sealing sheet (514), and the second air hole (511) is arranged in the first sealing sheet (514), and the air pipe (512) is out of the first air hole (521);The second sealing member (513) is a one-end closed air pipe, and the second sealing member (513) is rotatably connected to the air pipe (512) and abuts with the inner wall of the air pipe (512), and the first sealing member (522) is used to open and close the port of the second sealing member (513);The second sealing member (513) has second sealing sheet (523), and the second sealing sheet (523) is used to abut with the first sealing sheet (514), and the second sealing sheet (523) is provided with first through hole (5231);The lateral wall of the air pipe (512) is provided with third air hole (5121), and the lateral wall of the second sealing member (513) is provided with second through hole (5131);When the second through hole (5131) is communicated with the third air hole (5121), the second sealing sheet (523) seals the second air hole (511);When the first through hole (5231) is communicated with the second air hole (511), the lateral wall of the second sealing member (513) seals the third air hole (5121).

2. A device for sealing a formwork base joint according to claim 1, characterised in that: The second abutting assembly (2) comprises a first connecting seat (21) and a first guide roller (22), the first connecting seat (21) is provided with a rolling groove (211), the first guide roller (22) is located in the rolling groove (211), the central axis of the first guide roller (22) is located in the rolling groove (211), and the first guide roller (22) is used for abutting the outer surface of the sealing film (5).

3. A device for sealing a formwork joint according to claim 2, wherein: The first connecting seat (21) is connected with a first abutting plate (23), and the first abutting plate (23) is used for abutting the part of the sealing film (5) between the ground and the bottom wall of the formwork.

4. A device for sealing a formwork joint according to claim 3, wherein: The first abutting plate (23) is detachably connected with the first connecting seat (21).

5. A device for sealing a formwork base joint according to claim 2 or 3, characterised in that: The second abutting assembly (2) further comprises a second connecting seat (24) and a second guide roller (25), the second connecting seat (24) is used for connecting with the bottom of the formwork, the second guide roller (25) is rollingly connected with the second connecting seat (24), and the second guide roller (25) is used for abutting the outer surface of the sealing film (5).

6. The apparatus of claim 1, wherein: The sealing film (5) is provided with a plurality of connecting lines (53), the connecting lines (53) are used for connecting the first film (51) and the second film (52), the connecting lines (53) are arranged in the length direction of the sealing film (5), and a plurality of the connecting lines (53) are arranged in the width direction of the sealing film (5).

7. The apparatus of claim 1, wherein: The first abutting assembly (1) comprises a connecting plate (11) and a second abutting plate (12), the connecting plate (11) is used for connecting with the ground, and the second abutting plate (12) is detachably connected with the connecting plate (11) and is used for abutting the part of the sealing film (5) between the ground and the bottom wall of the formwork.

Images