A kind of anti-leakage structure and construction method of reserved hole in kitchen and bathroom

Abstract

The present invention relates to the technical field of building leakage prevention, and discloses a leakage prevention structure for a reserved hole in a kitchen and bathroom, comprising a sealing bucket installed between a pipe reserved hole and a drainage pipe, wherein the lower end of the sealing bucket is externally threadedly connected to a sealing ring, the lower end of the sealing ring is installed with an adjusting seat, the lower end of the adjusting seat is externally threadedly connected to a seat cover, and a positioning mechanism is provided inside the adjusting seat; the present invention pre-buries the sealing ring and the adjusting seat inside the floor slab when pouring the floor slab, and when the sealing bucket is later installed, it can be directly screwed into the interior of the sealing ring by means of threaded installation, which is also convenient for later disassembly and maintenance; a good waterproof and anti-penetration effect can be achieved by means of the sealing bucket, the sealing ring, the concrete layer, the raw tape layer and the waterproof glue; the positioning rod in the positioning mechanism is clamped in the positioning hole under the sealing bucket, and then the teeth are clamped by a limit plate, which can well prevent the sealing bucket from rotating itself and prevent the sealing bucket from loosening after long-term use.

Description

Technical Field

[0001] The invention relates to the technical field of building leakage prevention, in particular to a leakage prevention structure for a reserved hole between a kitchen and a bathroom and a construction method. Background Art

[0002] During the construction of fixed buildings, the concrete floors of kitchens and bathrooms usually have reserved holes for installing drainage pipes in subsequent projects. After the drainage pipes are installed in the reserved holes of the cast-in-place concrete floors of kitchens and bathrooms, water leakage is likely to occur around the drainage pipes. The leakage problem has always been a common quality problem that has not been completely eradicated and is currently a problem that needs to be solved urgently.

[0003] A Chinese patent discloses a leak-proof structure and construction method for reserved holes in kitchens and bathrooms (patent application publication number CN105464224A). This patented technology utilizes two concrete layers of different shapes and casts them separately, increasing the bonding area with the reserved holes for pipes and improving the leak resistance after the holes are sealed. This reduces the maintenance costs associated with leaks and helps conserve resources. However, there are some issues: while the leak-proofing effect achieved with two concrete layers of different shapes is achieved, the two layers are integrated as cast components. After extended use, they are difficult to remove from the waterproof pipe or reserved hole for maintenance, making them inconvenient to disassemble and replace. Therefore, those skilled in the art have provided a leak-proof structure and construction method for reserved holes in kitchens and bathrooms to address the issues raised in the aforementioned background art. Summary of the Invention

[0004] The object of the present invention is to provide a leakage-proof structure for reserved holes in kitchens and bathrooms and a construction method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A leakage-proof structure for reserved holes in kitchens and bathrooms, comprising a sealing bucket installed between a reserved hole for a pipe and a drainage pipe, wherein the lower end of the sealing bucket is externally threadedly connected to a sealing ring, the lower end of the sealing ring is installed with an adjusting seat, the lower end of the adjusting seat is externally threadedly connected to a seat cover, and the inner side of the adjusting seat is filled with a concrete layer, the upper surface of the sealing bucket is located on the outer side of the drainage pipe and is provided with a first sealing groove, the interior of the first sealing groove is installed with a sealing cover, the inner surface of the sealing cover is installed with a sealing ring, the inner side of the sealing bucket is located below the first sealing groove and is provided with a second sealing groove, the interior of the second sealing groove is filled with waterproof glue, a plurality of positioning holes are evenly provided on the lower surface of the sealing bucket, a raw tape layer is installed between the sealing bucket and the sealing ring, a plurality of annular grooves are evenly provided on the upper surface of the adjusting seat, and a positioning mechanism is provided inside the adjusting seat.

[0007] As a further solution of the present invention: first handles are installed on both left and right sides of the upper surface of the sealing cover, and second handles are installed on both left and right sides of the lower surface of the base cover.

[0008] As a further solution of the present invention: the positioning mechanism includes a first turntable, the outer surface of the first turntable is evenly installed with teeth, and connecting rods are installed at both ends of the upper surface of the first turntable, a spring is installed inside the connecting rod, and a telescopic rod is installed at the upper end of the spring, the lower surface of the first turntable is rotatably connected to the support disk, and support plates are installed at both ends of the lower surface of the support disk, one end of the support plate on the left side passes through and is rotatably connected to the support rod, the upper end of the support rod is installed with a first gear, and a limiting mechanism is arranged inside the support plate on the right side, a positioning disk is installed above the first turntable, a pull rod is installed on the lower surface of the positioning disk, and a number of positioning rods are evenly installed on the upper surface of the positioning disk.

[0009] As a further solution of the present invention: the limiting mechanism includes a mounting block and a mounting rod, a limiting plate is installed on the upper end of the mounting block, and a threaded rod is threadedly connected to the inside of the mounting block, a second gear is installed on the outside of the threaded rod and is located on the right side of the mounting block, a sliding rod is movably connected to the inside of the mounting block and is located above the threaded rod, and a third gear is installed on the upper end of the mounting rod.

[0010] As a further solution of the present invention: the inner surface of the seat cover is movably fitted to the outer surface of the drainage pipe, the sealing bucket, sealing ring, adjusting seat and seat cover are all installed inside the reserved hole of the pipe, and the sealing bucket, sealing ring, adjusting seat, seat cover and concrete layer are all installed outside the drainage pipe; the sealing ring and waterproof glue are both fitted to the outer surface of the drainage pipe.

[0011] As a further solution of the present invention: the telescopic rod is slidably connected to the inside of the connecting rod, the support plate is installed on the inner side surface of the adjustment seat, the first gear is meshed with the teeth, and the upper end of the telescopic rod is installed on the lower surface of the positioning plate.

[0012] As a further solution of the present invention: the pull rod is located on the inner side of the first turntable and the support plate, the positioning rod moves through the annular groove, and the number of positioning rods is equal to the number of positioning holes, and the diameter of the positioning rod is smaller than the diameter of the positioning hole.

[0013] As a further solution of the present invention: the mounting rod passes through and is rotatably connected to the right support plate, the limiting plate is opposite to the teeth, the right end of the threaded rod is rotatably connected to the inner side surface of the adjustment seat, the second gear is meshed with the third gear, and the right end of the sliding rod is installed on the inner side surface of the adjustment seat.

[0014] A construction method for a leak-proof structure of a reserved hole in a kitchen and bathroom comprises the following steps:

[0015] S1. When pouring the floor slab, reserve a hole for the pipe to install the anti-leakage structure, and then embed the sealing ring and adjustment seat inside the reserved hole for the pipe when pouring the floor slab;

[0016] S2. After the floor slab is formed, install it at the required position between the kitchen and bathroom. Screw the seat cover onto the lower end of the adjustment seat. Insert the drainage pipe through the sealing ring and the adjustment seat and out of the seat cover. Then pour a layer of concrete between the drainage pipe and the adjustment seat from above and wait for it to dry and form.

[0017] S3. Wrap the raw tape layer around the outside of the lower end of the sealing bucket, then screw the sealing bucket into the inside of the sealing ring. When the sealing bucket cannot be rotated, you can release it;

[0018] S4. Pour waterproof glue into the second sealing groove. Then, put the sealing cover on the outside of the drainage pipe and place it in the first sealing groove. Gently press the sealing ring so that the sealing ring fits tightly against the outer surface of the drainage pipe.

[0019] S5. Rotate the seat cover to remove it. The staff member pulls the pull rod downward with one hand and rotates the support rod with the other hand to drive the first turntable to rotate through the first gear and teeth. The first turntable and the positioning plate will rotate, and the pull rod will also rotate. The staff member's hand pulling the pull rod needs to be continuously loosened and pulled down. When the positioning rod is felt to be inserted into the positioning hole, both hands can be loosened; the rotating installation rod drives the threaded rod to rotate through the second gear and the third gear, so that the limit plate is stuck between the two adjacent teeth. In this way, the sealing bucket is stuck through the positioning mechanism, and the seat cover can be installed again, thereby completing the construction of the reserved hole anti-leakage structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention embeds the sealing ring and the adjusting seat into the interior of the floor slab in advance when pouring the floor slab. When the sealing bucket is installed later, it can be directly screwed into the interior of the sealing ring by means of threaded installation. The installation is simple and convenient, and it is also convenient for later disassembly and maintenance. An excellent waterproof and anti-penetration effect can be achieved through the sealing bucket, sealing ring, concrete layer, raw tape layer and waterproof glue. The positioning rod in the positioning mechanism is inserted into the positioning hole under the sealing bucket, and the teeth are then clamped by the limiting plate, which can effectively prevent the sealing bucket from rotating itself and prevent the sealing bucket from loosening after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a structure for preventing leakage of reserved holes in kitchens and bathrooms;

[0023] Figure 2 for Figure 1 A magnified view of middle A;

[0024] Figure 3 This is a cross-sectional view of a leak-proof structure for a reserved hole in a kitchen and bathroom;

[0025] Figure 4 This is a bottom view of a positioning hole in a leak-proof structure for a reserved hole in a kitchen and bathroom;

[0026] Figure 5 A top view of an annular groove in a leak-proof structure for a reserved hole in a kitchen or bathroom;

[0027] Figure 6 for Figure 3 A partial schematic diagram of

[0028] Figure 7 This is a structural diagram of a positioning mechanism in a leak-proof structure for a reserved hole in a kitchen or bathroom;

[0029] Figure 8 for Figure 7 Enlarged view of middle B;

[0030] Figure 9 This is a structural diagram of a limiting mechanism in a leakage-proof structure for reserved holes in kitchens and bathrooms.

[0031] In the figure: 1. Sealing bucket; 2. Pipe reserved hole; 3. Drainage pipe; 4. Sealing ring; 5. Adjustment seat; 6. Seat cover; 7. Concrete layer; 8. First sealing groove; 9. Sealing cover; 10. Sealing ring; 11. Second sealing groove; 12. Waterproof glue; 13. Positioning hole; 14. Raw tape layer; 15. Annular groove; 16. First handle; 17. Second handle; 18. Positioning mechanism; 19. First turntable; 20. Teeth; 21. Connecting rod; 22. Spring; 23. Telescopic rod; 24. Support plate; 25. Support plate; 26. Support rod; 27. First gear; 28. Limiting mechanism; 29. Positioning plate; 30. Pull rod; 31. Positioning rod; 32. Mounting block; 33. Mounting rod; 34. Limiting piece; 35. Threaded rod; 36. Second gear; 37. Sliding rod; 38. Third gear; 39. Floor slab. DETAILED DESCRIPTION

[0032] See also Figures 1 to 9In an embodiment of the present invention, a leakage-proof structure for a reserved hole in a kitchen and bathroom comprises a sealing bucket 1 installed between a reserved hole for a pipe 2 and a drainage pipe 3. The lower end of the sealing bucket 1 is externally threadedly connected to a sealing ring 4. The lower end of the sealing ring 4 is installed with an adjusting seat 5. The lower end of the adjusting seat 5 is externally threadedly connected to a seat cover 6. The inner side of the adjusting seat 5 is filled with a concrete layer 7. The inner surface of the seat cover 6 is movably fitted to the outer surface of the drainage pipe 3. The sealing bucket 1, the sealing ring 4, the adjusting seat 5 and the seat cover 6 are all installed inside the reserved hole for the pipe 2. The sealing bucket 1, the sealing ring 4, the adjusting seat 5, the seat cover 6 and the concrete layer 7 are all installed outside the drainage pipe 3. The upper surface of the sealing bucket 1 is located on the outside of the drainage pipe 3 and is opened. There is a first sealing groove 8, a sealing cover 9 is installed inside the first sealing groove 8, a sealing ring 10 is installed on the inner surface of the sealing cover 9, a second sealing groove 11 is opened on the inner side of the sealing bucket 1 below the first sealing groove 8, the interior of the second sealing groove 11 is filled with waterproof glue 12, the sealing ring 10 and the waterproof glue 12 are both fitted to the outer surface of the drainage pipe 3, a number of positioning holes 13 are evenly opened on the lower surface of the sealing bucket 1, a raw tape layer 14 is installed between the sealing bucket 1 and the sealing ring 4, a number of annular grooves 15 are evenly opened on the upper surface of the adjusting seat 5, a first handle 16 is installed on both sides of the upper surface of the sealing cover 9, and a second handle 17 is installed on both sides of the lower surface of the seat cover 6;

[0033] The sealing bucket 1 is threadedly connected to the inside of the sealing ring 4, so the sealing bucket 1 is detachable. The sealing cover 9 can be pulled out from the first sealing groove 8 through the first handle 16 using a tool, and the waterproof glue 12 can be crushed and mashed out using a tool, so that the sealing bucket 1 can be disassembled; the concrete layer 7 is concrete; the material of the sealing ring 10 is preferably rubber.

[0034] exist Figure 1 、 Figures 3 to 9Middle: The interior of the adjustment seat 5 is provided with a positioning mechanism 18, which includes a first turntable 19. The outer surface of the first turntable 19 is evenly equipped with teeth 20, and connecting rods 21 are installed on the left and right ends of the upper surface of the first turntable 19. A spring 22 is installed inside the connecting rod 21, and a telescopic rod 23 is installed on the upper end of the spring 22. The telescopic rod 23 is slidably connected to the inside of the connecting rod 21. The lower surface of the first turntable 19 is rotatably connected to a support disk 24. The lower surface of the support disk 24 is equipped with support plates 25 on both ends. The support plate 25 is installed on one side surface of the interior of the adjustment seat 5, and one end of the left support plate 25 penetrates and is rotatably connected to the support plate 24. A support rod 26 is provided with a first gear 27 at the upper end of the support rod 26, and the first gear 27 is meshedly connected to the teeth 20. A limiting mechanism 28 is provided inside the right support plate 25, and a positioning disk 29 is provided above the first turntable 19. The upper end of the telescopic rod 23 is installed on the lower surface of the positioning disk 29, and a pull rod 30 is installed on the lower surface of the positioning disk 29. The pull rod 30 is located on the inner side of the first turntable 19 and the support disk 24. A plurality of positioning rods 31 are evenly installed on the upper surface of the positioning disk 29. The positioning rods 31 are movable through the annular groove 15, and the number of the positioning rods 31 is equal to the number of the positioning holes 13, and the diameter of the positioning rods 31 is smaller than the diameter of the positioning holes 13;

[0035] The limiting mechanism 28 includes a mounting block 32 and a mounting rod 33. The mounting rod 33 passes through and is rotatably connected to the right support plate 25. A limiting plate 34 is installed on the upper end of the mounting block 32. The limiting plate 34 is opposite to the tooth 20. A threaded rod 35 is threadedly connected to the interior of the mounting block 32. The right end of the threaded rod 35 is rotatably connected to the inner side surface of the adjustment seat 5. A second gear 36 is installed on the outer side of the threaded rod 35, located on the right side of the mounting block 32. A sliding rod 37 is movably passed through the interior of the mounting block 32, located above the threaded rod 35. The right end of the sliding rod 37 is installed on the inner side surface of the adjustment seat 5. A third gear 38 is installed on the upper end of the mounting rod 33. The second gear 36 is meshed with the third gear 38.

[0036] The sealing bucket 1 can be clamped by the positioning mechanism 18 to prevent the sealing bucket 1 installed by the thread from loosening after long-term use; the teeth 20 are clamped by the limiting piece 34, so that the first turntable 19 cannot rotate, which can ensure the firmness of the installation of the sealing bucket 1.

[0037] exist Figures 1 to 9 A method for constructing a leak-proof structure for a reserved hole in a kitchen or bathroom comprises the following steps:

[0038] S1. When pouring the floor slab 39, a reserved hole 2 for the pipe to install the anti-leakage structure is reserved, and then the sealing ring 4 and the adjustment seat 5 are pre-buried inside the reserved hole 2 for the pipe when pouring the floor slab 39;

[0039] S2. After the floor slab 39 is formed, it is installed at the desired position between the kitchen and bathroom. The seat cover 6 is screwed onto the lower end of the adjustment seat 5. The drainage pipe 3 is passed through the sealing ring 4 and the adjustment seat 5 and out of the seat cover 6. Then, a concrete layer 7 is poured from above between the drainage pipe 3 and the adjustment seat 5 and waited for it to dry and form.

[0040] S3, wrap the raw tape layer 14 around the outer lower end of the sealing bucket 1, then screw the sealing bucket 1 into the interior of the sealing ring 4, and release it when the sealing bucket 1 cannot be rotated;

[0041] S4. Pour the waterproof glue 12 into the second sealing groove 11. Then, put the sealing cover 9 on the outside of the drainage pipe 3 and place it in the first sealing groove 8. Gently press the sealing ring 10 so that the sealing ring 10 fits tightly against the outer surface of the drainage pipe 3.

[0042] S5. Rotate the seat cover 6 to remove it. The staff member pulls the pull rod 30 downward with one hand and rotates the support rod 26 with the other hand to drive the first turntable 19 to rotate through the first gear 27 and the teeth 20. The first turntable 19 and the positioning disk 29 will rotate, and the pull rod 30 will also rotate. The staff member's hand pulling the pull rod 30 needs to be continuously loosened and pulled downward. When the positioning rod 31 is felt to extend into the positioning hole 13, both hands can be loosened; rotate the installation rod 33 to drive the threaded rod 35 to rotate through the second gear 36 and the third gear 38, so that the limiting piece 34 is stuck between the two adjacent teeth 20. In this way, the sealing bucket 1 is stuck through the positioning mechanism 18, and the seat cover 6 can be installed again, thereby completing the construction of the reserved hole anti-leakage structure.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A leak-proof structure for a reserved hole in a kitchen and bathroom, comprising a sealing bucket (1) installed between a reserved hole for a pipe (2) and a drainage pipe (3), wherein the lower end of the sealing bucket (1) is externally threadedly connected to a sealing ring (4), the lower end of the sealing ring (4) is installed with an adjustment seat (5), the lower end of the adjustment seat (5) is externally threadedly connected to a seat cover (6), and the inner side of the adjustment seat (5) is filled with a concrete layer (7), characterized in that: The upper surface of the sealing bucket (1) is provided with a first sealing groove (8) on the outside of the drainage pipe (3), a sealing cover (9) is installed inside the first sealing groove (8), and a sealing ring (10) is installed on the inner surface of the sealing cover (9). The inner side of the sealing bucket (1) is provided with a second sealing groove (11) below the first sealing groove (8), and the interior of the second sealing groove (11) is filled with waterproof glue (12). The lower surface of the sealing bucket (1) is evenly provided with a plurality of positioning holes (13), and a raw material tape layer (14) is installed between the sealing bucket (1) and the sealing ring (4). The upper surface of the adjusting seat (5) is evenly provided with a plurality of annular grooves (15), and a positioning mechanism (18) is provided inside the adjusting seat (5); The positioning mechanism (18) includes a first turntable (19), the outer surface of the first turntable (19) is evenly equipped with teeth (20), and connecting rods (21) are installed on both left and right ends of the upper surface of the first turntable (19), a spring (22) is installed inside the connecting rod (21), and a telescopic rod (23) is installed on the upper end of the spring (22), the lower surface of the first turntable (19) is rotatably connected to a support disk (24), and support plates (25) are installed on both left and right ends of the lower surface of the support disk (24), one end of the left support plate (25) passes through and is rotatably connected to a support rod (26), the upper end of the support rod (26) is equipped with a first gear (27), and a limiting mechanism (28) is provided inside the right support plate (25), a positioning disk (29) is installed above the first turntable (19), a pull rod (30) is installed on the lower surface of the positioning disk (29), and a plurality of positioning rods (31) are evenly installed on the upper surface of the positioning disk (29); The limiting mechanism (28) includes a mounting block (32) and a mounting rod (33), a limiting plate (34) is installed on the upper end of the mounting block (32), and a threaded rod (35) is threadedly connected to the inside of the mounting block (32), a second gear (36) is installed on the outside of the threaded rod (35) and located on the right side of the mounting block (32), a sliding rod (37) is movably connected to the inside of the mounting block (32) and located above the threaded rod (35), and a third gear (38) is installed on the upper end of the mounting rod (33); The pull rod (30) is located on the inner side of the first rotating disk (19) and the supporting disk (24), the positioning rod (31) moves through the annular groove (15), and the number of the positioning rods (31) is equal to the number of the positioning holes (13), and the diameter of the positioning rod (31) is smaller than the diameter of the positioning hole (13); The positioning rod (31) extends into the positioning hole (13).

2. The anti-leakage structure for reserved holes in kitchens and bathrooms according to claim 1, characterized in that: First handles (16) are installed on both left and right sides of the upper surface of the sealing cover (9), and second handles (17) are installed on both left and right sides of the lower surface of the seat cover (6).

3. The anti-leakage structure for reserved holes in kitchens and bathrooms according to claim 1, characterized in that: The inner surface of the seat cover (6) is movably fitted to the outer surface of the drainage pipe (3); the sealing bucket (1), the sealing ring (4), the adjusting seat (5) and the seat cover (6) are all installed inside the reserved hole (2) of the pipe; the sealing bucket (1), the sealing ring (4), the adjusting seat (5), the seat cover (6) and the concrete layer (7) are all installed outside the drainage pipe (3); and the sealing ring (10) and the waterproof glue (12) are both fitted to the outer surface of the drainage pipe (3).

4. The anti-leakage structure for reserved holes in kitchens and bathrooms according to claim 3, characterized in that: The telescopic rod (23) is slidably connected to the inside of the connecting rod (21), the support plate (25) is mounted on an inner side surface of the adjustment seat (5), the first gear (27) is meshedly connected to the teeth (20), and the upper end of the telescopic rod (23) is mounted on the lower surface of the positioning plate (29).

5. The anti-leakage structure for reserved holes in kitchens and bathrooms according to claim 4, characterized in that: The mounting rod (33) passes through and is rotatably connected to the right support plate (25), the limiting piece (34) is opposite to the tooth (20), the right end of the threaded rod (35) is rotatably connected to the inner side surface of the adjustment seat (5), the second gear (36) is meshed with the third gear (38), and the right end of the sliding rod (37) is mounted on the inner side surface of the adjustment seat (5).

6. A construction method for the anti-leakage structure of the reserved hole between kitchen and bathroom according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. When pouring the floor slab (39), a reserved hole (2) for installing the anti-leakage structure is reserved, and then the sealing ring (4) and the adjustment seat (5) are pre-buried inside the reserved hole (2) for the pipe when pouring the floor slab (39); S2. After the floor slab (39) is formed, it is installed at the desired position between the kitchen and the bathroom, the seat cover (6) is screwed onto the lower end of the adjustment seat (5), the drainage pipe (3) is passed through the sealing ring (4) and the adjustment seat (5) and out of the seat cover (6), and then a concrete layer (7) is poured between the drainage pipe (3) and the adjustment seat (5) from above, and waited for it to dry and form; S3, wrapping the raw material tape layer (14) around the outer portion of the lower end of the sealing bucket (1), and then screwing the sealing bucket (1) into the interior of the sealing ring (4). When the sealing bucket (1) stops rotating, release it; S4. Pour the waterproof glue (12) into the second sealing groove (11). Then, put the sealing cover (9) on the outside of the drainage pipe (3) and make it located in the first sealing groove (8). Press the sealing ring (10) so that the sealing ring (10) fits tightly against the outer surface of the drainage pipe (3). S5. Rotate the seat cover (6) to remove it. The staff member pulls the pull rod (30) downward with one hand and rotates the support rod (26) with the other hand to drive the first turntable (19) to rotate through the first gear (27) and the teeth (20). The first turntable (19) and the positioning plate (29) will rotate, and the pull rod (30) will also rotate. The staff member's hand pulling the pull rod (30) needs to be continuously loosened and then pulled downward. After the positioning rod (31) is inserted into the positioning hole (13), both hands are loosened; the installation rod (33) is rotated to drive the threaded rod (35) to rotate through the second gear (36) and the third gear (38), so that the limit plate (34) is stuck between two adjacent teeth (20). In this way, the sealing bucket (1) is stuck through the positioning mechanism (18), and the seat cover (6) can be installed again, thereby completing the construction of the reserved hole anti-leakage structure.

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