Pipeline floor penetration hole sealing and hanging template and anti-leakage device

Abstract

This invention belongs to the field of building construction technology, specifically relating to a formwork and anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs. It includes a floor slab and a pre-reserved hole set during floor slab pouring. A vertically placed pipe is coaxially placed inside the pre-reserved hole. A first support template and a second support template are fitted onto the outer surface of the pipe. The first and second support templates together form a ring, and the surfaces of the first and second support templates are provided with horizontal movement limiting blocks. The lower surfaces of both the first and second support templates are provided with movable blocks, and the side surfaces of the movable blocks are provided with abutment blocks. The lower surfaces of both the first and second support templates are connected to connecting blocks, and the two connecting blocks together form a sleeve. An adjusting block is connected to the outer surface of the sleeve. Using this invention, the problem of grout leakage easily arises when the upper surface of the support template cannot tightly fit the lower surface of the floor slab when the existing support template is fixed to the outer surface of the pipe.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a formwork and anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs. Background Technology

[0002] In high-rise building construction, it is often necessary to install cross-floor risers. Installing these risers requires reserving pipe penetration openings on each floor, with the opening size larger than the riser diameter. After the pipes are installed, a gap remains between the pipe and the reserved opening. This gap needs to be filled with concrete after pipe installation to effectively seal the reserved opening in the floor slab, ensuring the integrity of the building structure and preventing leakage. Currently, suspended formwork is commonly used to seal the gap between the floor slab and the pipes. For example, a Chinese patent provides a method for pipe penetration through floors. A pre-drilled hole sealing formwork device for floor slabs (patent publication number: CN219864034U) comprises a floor slab body with holes and a through-pipe installed inside the floor slab body. A support formwork for sealing the holes is slidably connected to the outer wall of the through-pipe. A fixing block is fixedly connected to the bottom surface of the support formwork, and the fixing block is movably connected by bolts. A sliding block is fixedly connected to the bottom surface of the support formwork. Through the coordinated use of the above devices, the top surface of the support formwork is tightly fitted to the bottom surface of the floor slab body, making it difficult to slide downwards, and concrete can be filled between the holes and the through-pipe.

[0003] Although the above technical solutions can solve the problem of concrete filling between pipes passing through floors and floor slabs, it is unreliable to prevent the support formwork from sliding downwards by using the unidirectional rotation of ratchet and pawl. For example, when the support formwork is close to the floor slab, the ratchet and pawl are not fully engaged and fixed, so the support formwork is not completely close to the lower surface of the floor slab, which leads to leakage during subsequent concrete pouring, ultimately affecting the construction quality and requiring secondary repairs later. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a formwork for sealing pre-reserved holes for pipes penetrating floor slabs, so as to solve the problem that when existing support formwork is fixed on the outer surface of the pipe, the upper surface of the support formwork cannot be tightly fitted with the lower surface of the floor slab, which easily leads to grout leakage.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A formwork for sealing pre-reserved holes for pipes penetrating floor slabs includes a floor slab and a pre-reserved hole set during floor slab pouring. A vertically placed pipe is coaxially placed in the pre-reserved hole. A first and second support template, which are detachably connected, are fitted onto the outer surface of the pipe. The first and second support templates together form a ring and abut against the lower surface of the floor slab. Horizontally movable limiting blocks are slidably passed through the surfaces of the first and second support templates near the pipe. Vertically movable movable blocks are elastically slidably passed through the lower surfaces of the first and second support templates. The side surfaces of the movable blocks are provided with abutment blocks protruding towards the limiting blocks, and the lower ends of the movable blocks extend beyond the lower surfaces of the first and second support templates. Vertically connected connecting blocks are connected to the lower surfaces of the first and second support templates. The two connecting blocks together form a sleeve, and an adjusting block is detachably connected to the outer surface of the sleeve. The adjusting block is threadedly connected to the outer surface of the sleeve, and when the sleeve moves upward along the surface of the adjusting block, it abuts against the lower end of the movable block.

[0007] Furthermore, positioning elements are provided on the two side surfaces of the first support template and the second support template that are in contact with each other. The positioning elements include a positioning block provided on the surface of the first support template and a positioning groove provided on the surface of the second support template. The positioning block protrudes from the surface of the first support template, and the positioning block and the positioning groove are detachably connected by magnetic attraction.

[0008] Furthermore, an auxiliary limiting block that moves horizontally is slidably inserted through the side surface of the connecting block near the pipe. An adjusting rod is threadedly connected to the end of the auxiliary limiting block away from the pipe. The adjusting rod is rotatably connected to the connecting block, and one end extends out of the connecting block.

[0009] Furthermore, the limiting block and the auxiliary limiting block are both provided with anti-slip pads on the side surface near the pipe.

[0010] This invention also provides a leak-proof device for pipe penetration through floor slab openings, disposed on the upper surface of a pipe penetration through floor slab opening sealing formwork. It includes a first annular sealing block fitted onto the outer surface of the pipe and a second annular sealing block fitting against the inner wall of the opening. The first and second annular sealing blocks are each composed of two semi-circular rings. Multiple circumferentially arranged first fixing blocks are connected between the first and second annular sealing blocks. The first, second, and first fixing blocks are on the same horizontal plane and together constitute a sealing element. Multiple sealing elements are spaced vertically and connected by multiple vertically arranged second fixing blocks. A third annular sealing block is connected to the surface of the lowest sealing element. The third annular sealing block is fitted onto the outer surface of the second annular sealing block and is composed of two semi-circular rings. The upper surface of the third annular sealing block abuts against the lower surface of the floor slab. Grooves that mate with the third annular sealing block are provided on the upper surfaces of both the first and second support formwork.

[0011] Furthermore, each of the first annular sealing blocks has a sealing ring attached to the side surface of the block that abuts against the pipe, and each of the second annular sealing blocks also has the sealing ring attached to the side surface of the block that is close to the floor slab.

[0012] Furthermore, the upper surface of the third annular sealing block is coaxially provided with multiple annular water-stop grooves of different diameters.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. This invention uses multiple sealing elements to increase the anti-leakage effect after concrete pouring by setting multiple sealing elements on the outer surface of the pipe and the inner wall of the reserved hole. The third annular sealing block set at the bottom of the sealing element can further improve the sealing effect between the concrete and the inner wall of the reserved hole.

[0015] 2. During concrete pouring, the first and second support templates work together to form a ring-shaped support plate that is fitted over the pipe. This not only effectively supports and fixes multiple sealing components, but also effectively abuts against the lower surface of the floor slab, ensuring that no grout leakage occurs during concrete pouring. The adjustment blocks and limit blocks work together to ensure that the first and second support plates are firmly fixed to the outer surface of the pipe and will not slide, effectively ensuring construction quality. Furthermore, the entire device is easy to assemble and disassemble, making construction convenient.

[0016] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0018] Figure 1 This is a schematic diagram of the pipe and floor structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the pipe and floor structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the sealing and anti-leakage device structure of the present invention;

[0021] Figure 4 for Figure 1 Sectional view at point AA;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 for Figure 4 Enlarged view of point C in the middle;

[0024] Figure 7 To prevent the formwork from exploding Figure 1 ;

[0025] Figure 8 To prevent the formwork from exploding Figure 2 ;

[0026] Figure 9 This is a schematic diagram of the anti-leakage device structure;

[0027] Figure 10 for Figure 9 Enlarged diagram of point D in the middle.

[0028] The following labels are shown in the attached diagram:

[0029] 1. Floor slab, 2. Reserved opening, 3. Pipe, 4. First support template, 5. Second support template, 6. Limiting block, 7. Abutment block, 8. Connecting block, 9. Adjusting block, 10. Positioning component, 101. Positioning block, 102. Positioning groove, 11. Auxiliary limiting block, 12. Adjusting rod, 13. Anti-slip pad, 14. Sealing component, 1401. First annular sealing block, 1402. Second annular sealing block, 1403. First fixing block, 15. Second fixing block, 16. Third annular sealing block, 17. Groove, 18. Sealing ring, 19. Water stop groove, 20. Sealing and hanging template, 21. Leakage prevention device, 22. Movable block. Detailed Implementation

[0030] like Figures 1-10 As shown,

[0031] A formwork for sealing pre-reserved holes for pipes penetrating floor slabs includes a floor slab 1 and a pre-reserved hole 2 set during the pouring of the floor slab 1. A vertically placed pipe 3 is coaxially placed in the pre-reserved hole 2. A detachably connected first support template 4 and second support template 5 are fitted onto the outer surface of the pipe 3. The first support template 4 and the second support template 5 together form a ring and abut against the lower surface of the floor slab 1. Horizontally movable limiting blocks 6 are slidably passed through the surfaces of the first support template 4 and the second support template 5 near the pipe 3. Vertically movable movable blocks 22 are elastically slidably passed through the lower surfaces of the first support template 4 and the second support template 5. The upper end of the movable block 22 abuts against a spring located inside the first support template 4 and the second support template 5, and the upper end of the spring abuts against the first support template 4 and the second support template 5. The inner walls of the first support template 4 and the second support template 5, and the side surfaces of the movable block 22 are all provided with abutting blocks 7 protruding towards the limiting block 6, and the lower ends of the movable block 22 extend out of the lower surfaces of the first support template 4 and the second support template 5; the lower surfaces of the first support template 4 and the second support template 5 are all integrally formed with vertically placed connecting blocks 8, the two connecting blocks 8 together form a sleeve, and the outer surface of the sleeve is detachably connected with an adjusting block 9, the adjusting block 9 is composed of two semi-circular ring blocks fixed together by bolts, the adjusting block 9 is threadedly connected to the outer surface of the sleeve, and when the adjusting block 9 moves vertically upward along the axis of the sleeve, the top of the adjusting block 9 abuts against the movable block 22 and makes it move upward synchronously, and the abutting block 7 abuts against the limiting block 6 and makes it move horizontally.

[0032] As shown in the figure, a first support template 4 and a second support template 5 are first placed on the outer surface of the pipe 3. After the first support template 4 and the second support template 5 are combined to form a ring structure, they are fitted onto the pipe 3, with the inner wall of the ring structure fitting against the outer surface of the pipe 3. Their positions are adjusted so that the upper surfaces of the first support template 4 and the second support template 5 abut against the lower surface of the floor slab 1. Then, the adjusting block 9 is installed on the outer wall of the connecting block 8. Since the adjusting block 9 is made up of two semi-circular ring blocks fixed together by bolts, the adjusting block 9 can limit the first support template 4 and the second support template 5. After the adjusting block 9 is installed, since the adjusting block 9 is threadedly connected to the connecting block 8, the adjusting block 9 is rotated so that its upper surface abuts against the lower surface of the movable block 22. Under the abutment action, the movable block 22 moves vertically upward, and at the same time, the abutment block 7 on its surface abuts against one end of the limiting block 6 and moves it horizontally toward the pipe 3. Figure 4 and Figure 5As shown, pressure is applied until one end of the limiting block 6 abuts against the outer wall of the pipe 3. At this time, the first support template 4 and the second support template 5 are fixed to the outer surface of the pipe 3 under the action of the two limiting blocks 6. The annular support plate formed by the first support template 4 and the second support template 5 is close to the lower surface of the floor slab 1. The adjusting block 9 has a self-locking effect under the action of the thread, which can keep the two limiting blocks 6 in their current state, ensuring the stable connection between the first support template 4, the second support template 5 and the pipe 3, and providing a stable working environment for subsequent concrete pouring. When it is necessary to remove this device, it is only necessary to remove the bolts on the adjusting block 9 with tools to quickly remove the adjusting block 9, the first support template 4 and the second support template 5. The process is simple and quick. The gap between the pipe 3 and the floor slab 1 is sealed by the ring formed by the first support template 4 and the second support template 5. Then, the adjusting block 9 is used to limit the first support template 4 and the second support template 5, and the limiting block 6 is driven to abut against the outer surface of the pipe 3. This not only reduces the operation process during installation, but also ensures that the ring formed by the first support template 4 and the second support template 5 can be firmly attached to the outer wall of the pipe 3. Moreover, the upper surface of the first support template 4 and the second support template 5 is close to the lower surface of the floor slab. After the two are tightly fitted, the adjusting block 9 is used for subsequent work, which ensures the sealing between the first support template 4 and the second support template 5 and the floor slab 1 and prevents the occurrence of grout leakage during the later concrete pouring.

[0033] In this embodiment, positioning elements 10 are provided on the two side surfaces of the first support template 4 and the second support template 5 that are in contact with each other. The positioning elements 10 include two hemispherical positioning blocks 101 disposed on the surface of the first support template 4 and two positioning grooves 102 disposed on the surface of the second support template 5. The two positioning blocks 101 and the positioning grooves 102 are symmetrically arranged about the first support template 4 and the second support template 5, respectively. The shape of the positioning grooves 102 matches the positioning blocks 101. The positioning blocks 101 protrude from the surface of the first support template 4 and are made of iron-containing material. Magnets (not shown in the figure) are embedded in the positioning grooves 102. The positioning blocks 101 and the positioning grooves 102 are detachably connected by magnetic attraction. When the positioning blocks 101 and the positioning grooves 102 are in contact, the first support template 4 and the second support template 5 form a ring shape.

[0034] Combination Figure 7 and Figure 8 As shown, after the first support template 4 and the second support template 5 are respectively attached to the outer surface of the pipe 3, the first support template 4 and the second support template 5 can be quickly assembled into a ring shape and fitted onto the outer surface of the pipe 3 through the cooperation of the positioning block 101 and the positioning groove 102, which reduces the time for the first support template 4 and the second support template 5 to align and cooperate, and improves the efficiency during construction.

[0035] In this embodiment, an auxiliary limiting block 11 that moves horizontally is slidably passed through the side surface of the connecting block 8 near the pipe 3. The end of the auxiliary limiting block 11 away from the pipe 3 is threadedly connected to a horizontally arranged adjusting rod 12. The adjusting rod 12 is rotatably connected to the connecting block 8, and the end of the adjusting rod 12 away from the limiting block 6 extends out of the connecting block 8.

[0036] Combination Figure 6 As shown, when the first support template 4 and the second support template 5 form a ring and abut against the lower surface of the floor slab 1, the adjusting block 9 is fitted onto the surface of the connecting block 8, and after the top of the adjusting block 9 abuts against the movable block 22, the adjusting rod 12 is rotated and the auxiliary limiting block 11 is driven to move towards the pipe 3 through the thread, so that the surface of the auxiliary limiting block 11 abuts against the outer wall of the pipe 3, further improving the firmness of the first support template 4 and the second support template 5 fixed on the pipe 3, and preventing displacement, leakage and other situations during the later pouring of concrete.

[0037] In this embodiment, the limiting block 6 and the auxiliary limiting block 11 are both provided with rubber anti-slip pads 13 on the side surface of the pipe 3.

[0038] The anti-slip mat 13 can increase friction and prevent the first support formwork 4 and the second support formwork 5 from sliding under the weight of the concrete during concrete pouring, which would cause gaps between the upper surface of the first support formwork 4 and the second support formwork 5 and the lower surface of the floor slab 1, ultimately leading to grout leakage during pouring.

[0039] This invention also provides a leak-proof device for pipe penetration through floor slab openings, disposed on the upper surface of a pipe penetration through floor slab sealing formwork. It includes a first annular sealing block 1401 fitted onto the outer surface of the pipe 3 and a second annular sealing block 1402 fitted against the inner wall of the opening 2. The first annular sealing block 1401 and the second annular sealing block 1402 are each formed by two semi-circular rings snapped together. Multiple circumferentially arranged first fixing blocks 1403 are connected together between the first annular sealing block 1401 and the second annular sealing block 1402. The first annular sealing block 1401, the second annular sealing block 1402, and the first fixing blocks 1403 are all connected together. The sealing elements 14 are located on the same horizontal plane and together constitute the sealing element 14. Three sealing elements 14 are arranged vertically at intervals, and the three sealing elements 14 are connected by multiple vertically placed second fixing blocks 15. The surface of the sealing element 14 located at the bottom is connected to a third annular sealing block 16. The third annular sealing block 16 is sleeved and fixed on the outer ring surface of the second annular sealing block 1402. The third annular sealing block 16 is also composed of two semi-circular rings, and the upper surface of the third annular sealing block 16 abuts against the lower surface of the floor slab 1. The upper surfaces of the first support template 4 and the second support template 5 are both provided with grooves 17 that cooperate with the third annular sealing block 16.

[0040] As shown in the figure, the first annular sealing block 1401 and the second annular sealing block 1402 are each formed by two semi-circular rings snapped together. In this embodiment, the snapping method uses plastic snapping blocks, such as... Figure 10 As shown in the figure, the groove that mates with the snap-fit ​​block is not shown. The snap-fit ​​block deforms to engage with the corresponding groove, allowing multiple semi-circular rings to snap together to form the first annular sealing block 1401 and the second annular sealing block 1402, facilitating installation and fitting onto the outer surface of the pipe 3. After assembling the anti-leakage device 21 (a shorthand for an anti-leakage device for a pipe penetration through a floor slab, hereinafter the same) and fitting it onto the surface of the pipe 3, the anti-leakage device 21 is moved vertically upwards until the upper surface of the third annular sealing block 16 abuts against the lower surface of the floor slab 1. Then, the sealing hanging template (a shorthand for a sealing hanging template for a pipe penetration through a floor slab, hereinafter the same) is installed on the outer wall of the pipe 3 and slid upwards until the upper surfaces of the first support template 4 and the second support template 5 abut against the lower surface of the floor slab 1. The third annular sealing block 16 engages with the groove 17 on the upper surface of the first support template 4 and the second support template 5, allowing the sealing hanging template 20 to engage with the anti-leakage device. 21 serves as a support and fixation element; at this time, multiple sealing elements 14 are located inside the reserved hole 2. The inner ring of the first annular sealing block 1401 is tightly attached to the outer surface of the pipe 3, and the second annular sealing block 1402 is tightly attached to the inner wall of the reserved hole 2. After the concrete is poured, since all three first annular sealing blocks 1401 protrude from the outer surface of the pipe 3, multiple right-angle corners are formed between the concrete and the outer wall of the pipe 3 and the first annular sealing blocks 1401, which can play a role in preventing leakage in the vertical direction and effectively prevent the possibility of liquid on the upper surface of the floor slab 1 from leaking through the gap between the concrete and the outer wall of the pipe 3. The function of the second annular sealing block 1402 is similar to that of the first annular sealing block 1401, so it will not be described in detail here; while the third annular sealing block 16 abuts against the upper surface of the floor slab 1, which can not only play a positioning role in the installation of the anti-leakage device 21, but also further increase the number of corners between the second annular sealing block 1402 and the inner wall of the reserved hole 2, thereby improving the anti-leakage effect.

[0041] In this embodiment, each of the first annular sealing blocks 1401 has a rubber sealing ring 18 connected to the side surface of the pipe 3, and the second annular sealing blocks 1402 have a rubber sealing ring 18 connected to the side surface of the floor slab 1.

[0042] When installing the anti-leakage device 21, the rubber sealing ring 18 has a certain degree of elastic deformation. Therefore, the sealing ring 18 can effectively fill the gap between the surface of the first annular sealing block 1401 and the outer surface of the pipe 3 by its own deformation, ensuring that the first sealing annular block 1401 can fit tightly against the surface of the pipe 3 and increasing the number of corners on the outer surface of the pipe 3. The sealing ring 18 on the outer surface of the second annular sealing block 1402 has the same function as the above effect. It can cope with the uneven surface of the inner ring of the reserved hole 2 and ensure that the side surface of the second annular sealing block 1402 can abut against the inner wall of the reserved hole 2 in the floor slab 1, effectively improving the anti-leakage effect of the first annular sealing block 1401 and the second annular sealing block 1402 after the concrete is poured.

[0043] In this embodiment, the upper surface of the third annular sealing block 16 is coaxially provided with three annular water-stop grooves 19 of different diameters.

[0044] Combination Figure 5 As shown, the cross-section of the water-stop groove 19 is trapezoidal. The water-stop groove 19 can increase the number of corners after the upper surface of the third annular sealing block 16 is attached to the lower surface of the floor slab 1. The recessed water-stop groove 19 can play a certain role in blocking the leakage liquid, further improving the anti-leakage effect.

[0045] The installation steps for this invention are as follows:

[0046] S1. Select a sealing formwork 20 and a leak-proof device 21 of appropriate size according to the size of the gap between the reserved hole 2 and the pipe 3;

[0047] S2. Before installing the sealing and hanging template 20 and the anti-seepage device 21, the inner wall of the reserved hole 2 is properly roughened, and a release agent is applied to the upper surface of the first support template 4 and the second support template 5 to facilitate later removal and reuse.

[0048] S3. First, install the anti-leakage device 21. After the anti-leakage device 21 is fitted onto the outer surface of the pipe 3, move it upward until the upper surface of the third annular sealing block 16 abuts against the lower surface of the floor slab 1. Then, install the sealing hanging template 20. First, fit the first support template 4 and the second support template 5 onto the outer surface of the pipe 3. Then, fit the adjusting block 9 onto the outer surface of the connecting block 8 and tighten the bolts on the adjusting block 9. Then, move the first support template 4 and the second support template 5 upward until the third annular sealing block 16 matches the groove 17 on the upper surface of the first support template 4 and the second support template 5. At this time, the upper surfaces of the first support template 4 and the second support template 5 also abut against the lower surface of the floor slab 1. Rotate the adjusting block 9 to move it upward. After the top of the adjusting block 9 abuts against the movable block 22, it moves upward together for a distance until the adjusting block 9 is tightened and can no longer be rotated. Then, rotate the adjusting rod 12 so that the auxiliary limiting block 11 abuts against the outer surface of the pipe 3.

[0049] S4. After installing the anti-leakage device 21 and the sealing formwork 20 in sequence, pour and tamp the concrete in two stages to fill the gap between the inner wall of the reserved hole 2 and the outer wall of the pipe 3. The first pouring is to half the thickness of the floor slab 1. After curing for a period of time and reaching a certain strength, pour the concrete to the level with the upper surface of the floor edge.

[0050] S5. Remove the sealing and hanging template 20, loosen the bolts on the adjusting block 9, remove the adjusting block 9 and the first support template 4 and the second support template 5 for easy reuse in the future. The anti-leakage device 21 is permanently installed in the gap between the reserved hole 2 and the pipe 3. The third annular sealing block 16 protrudes from part of the lower surface of the floor slab 1 and can be leveled by applying putty during the later decoration.

[0051] S6. Water containment test: After the gap between the reserved hole 2 and the pipe 3 is sealed, a 24-hour water containment test should be conducted at the base of the pipe 3 to ensure that there is no leakage.

[0052] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A leak-proof device for sealing pre-reserved holes for pipes penetrating floor slabs and for using suspended formwork, comprising a floor slab (1) and a pre-reserved hole (2) set during the pouring of the floor slab (1), wherein a vertically placed pipe (3) is coaxially placed in the pre-reserved hole (2), characterized in that: The outer surface of the pipe (3) is fitted with a detachably connected first support template (4) and second support template (5). The first support template (4) and second support template (5) together form a ring and abut against the lower surface of the floor slab (1). The surfaces of the first support template (4) and second support template (5) near the pipe (3) are slidably fitted with horizontally movable limiting blocks (6). The lower surfaces of the first support template (4) and second support template (5) are elastically fitted with vertically movable movable blocks (22). The side of the movable block (22) All surfaces are provided with abutting blocks (7) protruding towards the limiting block (6), and the lower ends of the movable block (22) extend out of the lower surfaces of the first support template (4) and the second support template (5); the lower surfaces of the first support template (4) and the second support template (5) are connected with vertical connecting blocks (8), the two connecting blocks (8) together form a sleeve, and the outer surface of the sleeve is detachably connected with an adjusting block (9), the adjusting block (9) is threadedly connected to the outer surface of the sleeve, and when the sleeve moves upward along the surface of the adjusting block (9), it will abut the lower end of the movable block (22); The outer surface of the pipe (3) is fitted with a first annular sealing block (1401) and a second annular sealing block (1402) that fits against the inner wall of the reserved hole (2). The first annular sealing block (1401) and the second annular sealing block (1402) are each composed of two semi-circular rings. The first annular sealing block (1401) and the second annular sealing block (1402) are connected together by a number of circumferentially arranged first fixing blocks (1403). The first annular sealing block (1401), the second annular sealing block (1402) and the first fixing blocks (1403) are in the same horizontal plane and together constitute a sealing element (14). Multiple sealing elements (14) are spaced apart in the vertical direction, and the multiple sealing elements (14) are connected by multiple vertically placed second fixing blocks (15); the surface of the sealing element (14) located at the bottom is connected to a third annular sealing block (16), the third annular sealing block (16) is sleeved on the outer ring surface of the second annular sealing block (1402), the third annular sealing block (16) is composed of two semi-circular rings, and the upper surface of the third annular sealing block (16) abuts against the lower surface of the floor slab (1); the upper surfaces of the first support template (4) and the second support template (5) are both provided with grooves (17) that cooperate with the third annular sealing block (16).

2. The anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs and installing suspended formwork as described in claim 1, characterized in that: Positioning elements (10) are provided on the two side surfaces of the first support template (4) and the second support template (5) that are in contact with each other. The positioning elements (10) include a positioning block (101) provided on the surface of the first support template (4) and a positioning groove (102) provided on the surface of the second support template (5). The positioning block (101) protrudes from the surface of the first support template (4), and the positioning block (101) and the positioning groove (102) are detachably connected by magnetic adsorption.

3. The anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs and installing suspended formwork as described in claim 2, characterized in that: The connecting block (8) has an auxiliary limiting block (11) that moves horizontally through its surface near the pipe (3). The auxiliary limiting block (11) is threaded with an adjusting rod (12) at one end away from the pipe (3). The adjusting rod (12) is rotatably connected to the connecting block (8) and one end extends out of the connecting block (8).

4. The anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs and installing suspended formwork as described in claim 3, characterized in that: The limiting block (6) and the auxiliary limiting block (11) are both provided with anti-slip pads (13) on the side surface of the pipe (3).

5. The anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs and installing suspended formwork as described in claim 1, characterized in that: Each of the first annular sealing blocks (1401) has a sealing ring (18) connected to the side surface of the pipe (3) that abuts against it, and each of the second annular sealing blocks (1402) also has the sealing ring (18) connected to the side surface of the floor slab (1).

6. The anti-leakage device for sealing pre-reserved holes for pipes penetrating floor slabs and installing suspended formwork as described in claim 5, characterized in that: The upper surface of the third annular sealing block (16) is coaxially provided with multiple annular water-stop grooves (19) of different diameters.

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