Assembled bathroom waterproof bottom box

Abstract

The application relates to a prefabricated bathroom waterproof bottom box, and relates to the technical field of bathrooms. The application specifically comprises a bottom box body, a plurality of water pipes for draining water in the bottom box body, and a water pipe collector for collecting the plurality of water pipes and draining the water into a preset drain pipe; a mounting groove penetrating through the bottom box body is arranged on the bottom box body, one end of each of the plurality of water pipes is connected with the side wall of the mounting groove, and the other end of each of the plurality of water pipes is simultaneously connected with the water pipe collector; a drain port for draining the collected water into the preset drain pipe is arranged on the water pipe collector; a drain hole is arranged in the region of the bottom box body without the mounting groove, and the drain hole is communicated with the plurality of water pipes. The application adopts the plurality of water pipes to drain the water in the bottom box body, accelerates the water draining speed, prevents the water from accumulating in the bottom box body, and enables the other water pipes to continue draining water when one of the water pipes is blocked, thereby reducing the possibility of the water pipe blockage and further solving the problem of water accumulation in the bathroom.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bathroom, in particular to an assembled bathroom waterproof bottom box. BACKGROUND

[0002] At present, the assembled bathroom floor adopts a waterproof bottom box for ground waterproofing and drainage. The prior art is to fix the waterproof bottom box on the ground by adhesive, then open a hole in the waterproof bottom box, install a drainage flange and a floor drain, and connect with the sewer pipe. A bottom frame profile is installed in the waterproof bottom box, and a wallboard is installed inside the bottom frame profile and the waterproof bottom box. The existing waterproof bottom box is provided with a drainage hole connected with the sewer pipe for drainage. When the water volume is large during showering or the drainage pipe is blocked and the water flows slowly, water accumulation is easy to occur in the bathroom.

[0003] Chinese patent CN209966215U, published on January 21, 2020, discloses a whole bathroom bottom disc structure, which comprises a bottom disc body, the edge of the bottom disc body is provided with a waterproof ridge, the bottom disc body is provided with a wallboard mounting groove, the wallboard mounting groove is arranged adjacent to the waterproof ridge, the wallboard mounting groove is provided with a boss for mounting a wallboard, the boss comprises multiple levels, one of which abuts against the wallboard, and the boss, the bottom surface of the wallboard mounting groove, the groove side surface of the wallboard mounting groove and the wallboard form a cavity for drainage. The application provides a whole bathroom bottom disc structure, which solves the problem that the bottom disc structure in the prior art cannot exclude water seepage in the wallboard. However, the bottom disc structure discharges water through a drainage opening in the bottom disc body. When the water volume is large during showering or the drainage pipe is blocked and the water flows slowly, water accumulation is easy to occur in the bathroom. SUMMARY

[0004] The present application aims to solve the problem of water accumulation in the bathroom by providing an assembled bathroom waterproof bottom box.

[0005] The present application provides an assembled bathroom waterproof bottom box, which comprises a bottom box body, a plurality of water pipes for discharging water from the bottom box body, and a water pipe collector for collecting water from the plurality of water pipes and discharging the water into a predetermined drainage pipe. An installation groove is formed through the bottom box body, one end of each of the plurality of water pipes is connected to the side wall of the installation groove, and the other end of each of the plurality of water pipes is connected to the water pipe collector. A drainage opening is formed on the water pipe collector for discharging the collected water into the predetermined drainage pipe. A drainage hole is formed in the area of the bottom box body where the installation groove is not formed, and the drainage hole is in communication with one end of the installation groove side wall connected to the plurality of water pipes in the bottom box body for discharging water in the bottom box body into the water pipes.

[0006] Further, a supporting rim is further included, which is arranged around the bottom box body, and a first protruding part is arranged on the supporting rim for mounting the wallboard.

[0007] Further, the first protruding part is arranged along the circumference of the supporting rim.

[0008] Further, a cover plate is further included for preventing large articles from entering the bottom box body and blocking the drain hole, and a cover plate frame is further included for fixing and supporting the cover plate, which is arranged on the bottom box body, and a gap for water passing is formed between the cover plate fixedly connected on the cover plate frame and the accommodating cavity.

[0009] Further, an insertion slot is arranged on the cover plate frame, and a second protruding part is arranged on the cover plate for insertion into the insertion slot.

[0010] Further, the insertion slot is arranged along the circumference of the cover plate frame, and the second protruding part is arranged along the circumference of the cover plate.

[0011] Further, the cross-sectional area of the cover plate is smaller than that of the accommodating cavity.

[0012] Further, the drain hole is a plurality of holes arranged along the circumference of the bottom box body, and a drain passage is arranged in the bottom box body, and the plurality of drain holes are in communication with one end of the drain passage, and a plurality of water pipes connected to the side walls of the mounting slot are in communication with the other end of the drain passage.

[0013] Further, the mounting slot is a rectangular mounting slot, and the water pipes are four pipes connected to the four side walls of the rectangular mounting slot.

[0014] Further, the water pipe collector is arranged at the center of the four water pipes.

[0015] The assembled bathroom waterproof bottom box has the following advantages:

[0016] (1) The waterproof bottom box is provided with a mounting groove penetrating through the bottom box on the bottom box body, a drainage hole is arranged on the region of the bottom box body without the mounting groove, a plurality of water pipes are connected to the side wall of the mounting groove, the other ends of the plurality of water pipes are connected to a water pipe collector, the drainage hole is communicated with the plurality of water pipes in the bottom box body, in this way, the water in the bottom box body can enter the plurality of water pipes through the drainage hole, and then is collected by the plurality of water pipes into the water pipe collector, finally, the water is discharged into the drain pipe through the drain port of the water pipe collector and the pre-set drain pipe, and is discharged out of the bathroom through the drain pipe. Since the plurality of water pipes are used to discharge the water in the bottom box body, the speed of water drainage is accelerated, so that the water accumulation in the bottom box body is prevented, and when one of the water pipes is blocked, the other water pipes can still continue to drain water, so that the possibility of water pipe blockage is reduced;

[0017] (2) The waterproof bottom box further comprises a support surrounding edge surrounding the bottom box body, the support surrounding edge is provided with a first protruding part for mounting a wallboard, and the support surrounding edge surrounds the bottom box body to form a containing cavity for water to enter the bottom box body. The support surrounding edge surrounds the bottom box body, and the first protruding part is arranged on the support surrounding edge to limit the wallboard when the wallboard is mounted on the bottom box body, so that the installation of the wallboard on the bottom box body is facilitated. The support surrounding edge surrounds the bottom box body to form a containing cavity with an open top, so that water in the bathroom can enter the bottom box body, thereby facilitating the discharge of water from the bottom box body;

[0018] (3) The waterproof bottom box further comprises a cover plate for preventing large articles from entering the bottom box body to block the drainage hole, and a cover plate frame for fixing and supporting the cover plate, the cover plate frame is arranged on the bottom box body, and a gap for water to pass through is formed between the cover plate fixedly connected to the cover plate frame and the containing cavity. The cover plate frame is arranged on the bottom box body to support the cover plate. The cover plate is arranged to prevent large articles from falling into the bottom box body to block the drainage hole during showering, thereby causing slow drainage of the bottom box body. However, the cover plate cannot completely close the containing cavity formed by the bottom box body and the support surrounding edge, which will cause water to be unable to enter the bottom box body. Therefore, the cover plate has a certain gap with the containing cavity, so that water can flow into the bottom box body from the gap. However, the gap cannot be too large, otherwise the cover plate cannot prevent large articles from entering the bottom box body. Of course, the gap cannot be too small, because the size of the gap affects the speed of water drainage, and a too small gap will cause slow drainage of the bottom box body, thereby causing water accumulation in the bathroom. The actual size of the gap is determined according to the specific use condition;

[0019] (4) The cover frame of the waterproof bottom box is provided with an insertion slot, and the cover plate is provided with a second protruding part inserted into the insertion slot. The cover frame is provided with an insertion slot, and the cover plate is provided with a second protruding part. When the cover plate is closed on the cover frame, the second protruding part cooperates with the insertion slot, so that the cover frame supports and fixes the cover plate. If the cover frame does not fix the cover plate, the cover plate can move freely on the cover frame in actual use, which may cause safety hazards. The reason for fixing the cover plate on the cover frame in this way is that this fixing method is convenient for installing and dismounting the cover plate on the cover frame, thereby facilitating the cleaning of dirt in the bottom box body.

[0020] (5) The cross-sectional area of the cover plate of the waterproof bottom box is smaller than that of the containing cavity. In order to make the cover plate on the cover frame have a certain gap with the containing cavity, there are two cases: the first case is that the height of the cover frame is greater than the depth of the containing cavity, so that the cover frame lifts the cover plate on it by a certain height from the containing cavity, thereby making the cover plate have a certain gap with the containing cavity; the second case is that the cross-sectional area of the cover plate is smaller than that of the containing cavity, thereby making the side of the cover plate placed in the containing cavity have a certain gap with the side wall of the containing cavity. In this application, the second case is preferred because the cover frame and the cover plate protrude out of the containing cavity of the bottom box body, which may cause the floor of the bathroom to be uneven, thereby causing safety hazards, and the second case has no requirement on the height of the cover frame and the cover plate, so the upper surface of the cover plate can coincide with the upper surface of the containing cavity, thereby making the floor of the bathroom flat.

[0021] (6) The waterproof bottom box has multiple drainage holes arranged circumferentially along the bottom box body, and the bottom box body is provided with a drainage channel. The multiple drainage holes are in communication with one end of the drainage channel, and the multiple water pipes connected to the side wall of the mounting groove are in communication with the other end of the drainage channel. The bottom box body is provided with a drainage channel, and multiple drainage holes are arranged circumferentially along the bottom box body. The one end of the drainage channel is in communication with the multiple drainage holes, and the other end is in communication with the multiple water pipes connected to the side wall of the mounting groove. Multiple drainage holes are arranged to enable water entering the bottom box body to be discharged from multiple drainage holes at the same time, thereby accelerating the drainage speed of the bottom box. In addition, the multiple drainage holes are arranged circumferentially along the bottom box body, which can also enable water in each part of the bottom box body to flow into the drainage holes, preventing the water in the bottom box body from not being completely drained. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In these drawings, like reference numerals are used to represent similar elements.

[0023] Figure 1 It is an installation schematic diagram of the cover plate of the assembled waterproof bottom box of the bathroom when it is removed.

[0024] Figure 2 It is a structure schematic view of the cover plate of the assembled bathroom waterproof bottom box of the embodiment of the present application when being covered;

[0025] Figure 3 It is an installation schematic view of the base body and the support surrounding edge of the assembled bathroom waterproof bottom box of the embodiment of the present application;

[0026] Figure 4 It is a structure schematic view of the support surrounding edge of the assembled bathroom waterproof bottom box of the embodiment of the present application;

[0027] Figure 5 It is a structure schematic view of the bottom box body of the assembled bathroom waterproof bottom box of the embodiment of the present application;

[0028] Figure 6 It is a structure schematic view of the cover plate of the assembled bathroom waterproof bottom box of the embodiment of the present application;

[0029] Figure 7 It is a structure schematic view of the cover plate frame of the assembled bathroom waterproof bottom box of the embodiment of the present application.

[0030] In the figure: 1, bottom box body; 11, installation slot; 12, drainage hole; 13, drainage channel; 2, water pipe; 3, water pipe collector; 4, support surrounding edge; 41, first protruding part; 42, containing cavity; 5, cover plate; 51, second protruding part; 6, cover plate frame; 61, plug-in slot. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiment in the present application belong to the protection scope of the present application.

[0032] The assembled bathroom waterproof bottom box of the embodiment of the present application comprises a bottom box body 1, a plurality of water pipes 2 for draining water in the bottom box body 1, and a water pipe collector 3 for collecting water in the plurality of water pipes 2 together and draining into a preset drain pipe; the bottom box body 1 is provided with an installation slot 11 penetrating through the bottom box body 1, one end of the plurality of water pipes 2 is connected with the side wall of the installation slot 11, and the other end is simultaneously connected with the water pipe collector 3, the water pipe collector 3 is provided with a drainage opening for draining the collected water into the preset drain pipe, the area of the bottom box body 1 not provided with the installation slot 11 is provided with a drainage hole 12, the drainage hole 12 is in communication with one end of the installation slot 11 side wall of the plurality of water pipes 2 in the bottom box body 1, and is used for draining water in the bottom box body 1 into the water pipe 2, and the specific effect can be seen from Figure 1 and Figure 5 .

[0033] The application is provided with a mounting groove 11 penetrating the bottom box, the area of the bottom box body 1 without the mounting groove 11 is provided with a drainage hole 12, a plurality of water pipes 2 are connected to the side wall of the mounting groove 11, the other end of the plurality of water pipes 2 is connected to the water pipe collector 3, the drainage hole 12 is communicated with the plurality of water pipes 2 in the bottom box body 1, so that the water in the bottom box body 1 enters the plurality of water pipes 2 through the drainage hole 12, and then is collected into the water pipe collector 3 through the plurality of water pipes 2, and finally is discharged into the drain pipe through the drainage port of the water pipe collector 3 and the preset drain pipe, and is discharged out of the bathroom through the drain pipe. Since the application adopts the plurality of water pipes 2 to discharge the water in the bottom box body 1, the speed of drainage is accelerated, so that the water accumulation in the bottom box body 1 is prevented, and after one of the water pipes 2 is blocked, the other water pipes 2 can still continue to drain, so that the possibility of the water pipe 2 being blocked is reduced.

[0034] Further comprising a support surrounding edge 4 surrounding the bottom box body 1, the support surrounding edge 4 is provided with a first protruding part 41 for installing the wallboard, the support surrounding edge 4 surrounds the bottom box body 1 to form a containing cavity 42 for water to enter the bottom box body 1, and the specific effect can be seen from Figure 3 and Figure 4 The support surrounding edge 4 surrounds the bottom box body 1 to form the containing cavity 42 with an open top, for water in the bathroom to enter the bottom box body 1, so that the water in the bottom box body 1 is conveniently discharged.

[0035] The first protruding part 41 is circumferentially arranged along the support surrounding edge 4, and the specific effect can be seen from Figure 4 The first protruding part 41 is circumferentially arranged along the support surrounding edge 4, and the specific effect can be seen from

[0036] In the embodiment, further comprising a cover plate 5 for preventing large articles from entering the bottom box body 1 to block the drainage hole 12, and a cover plate frame 6 for fixing and supporting the cover plate 5, the cover plate frame 6 is arranged on the bottom box body 1, the cover plate 5 fixedly connected to the cover plate frame 6 forms a gap for water to pass between the cover plate 5 and the containing cavity 42, and the specific effect can be seen from Figure 1 andFigure 2 The cover plate 5 is arranged on the bottom box body 1 to prevent large objects from falling into the bottom box body 1 and blocking the drain hole 12 during showering, thereby causing slow drainage of the bottom box body 1. However, the cover plate 5 cannot completely close the containing cavity 42 formed by the bottom box body 1 and the supporting surrounding edge 4, which causes water to be unable to enter the bottom box body 1. Therefore, the cover plate 5 and the containing cavity 42 have a certain gap, which allows water to flow into the bottom box body 1 from the gap. However, the gap cannot be too large, otherwise the cover plate 5 cannot prevent large objects from entering the bottom box body 1. Of course, the gap cannot be too small, because the size of the gap affects the speed of drainage. If the gap is too small, the bottom box body 1 will drain slowly, thereby causing water to accumulate in the bathroom. The actual size of the gap is determined according to the specific use.

[0037] The cover plate frame 6 is provided with a plug-in groove 61, and the cover plate 5 is provided with a second protruding part 51 that is plugged into the plug-in groove 61. The specific effect is shown in Figure 6 and Figure 7 The cover plate frame 6 is provided with a plug-in groove 61, and the cover plate 5 is provided with a second protruding part 51. When the cover plate 5 is closed on the cover plate frame 6, the second protruding part 51 cooperates with the plug-in groove 61, thereby supporting and fixing the cover plate 5 on the cover plate frame 6. If the cover plate frame 6 does not fix the cover plate 5, the cover plate 5 can move randomly on the cover plate frame 6 in actual use, which may cause safety hazards. The reason for fixing the cover plate 5 on the cover plate frame 6 in this way is that this fixing method is convenient for installing and dismounting the cover plate 5 on the cover plate frame 6, thereby facilitating the cleaning of dirt in the bottom box body 1.

[0038] The plug-in groove 61 is circumferentially arranged along the cover plate frame 6, and the second protruding part 51 is circumferentially arranged along the cover plate 5. The specific effect is shown in Figure 6 and Figure 7 The plug-in groove 61 is arranged along one circumference of the cover plate 5, and the second protruding part 51 is arranged along one circumference of the cover plate 5. When the second protruding part 51 cooperates with the plug-in groove 61, one circumference of the cover plate 5 is fixedly connected to the cover plate frame 6, which makes the fixation of the cover plate 5 on the cover plate frame 6 more stable, thereby making the structure of the waterproof bottom box more stable.

[0039] The cross-sectional area of the cover plate 5 is smaller than that of the accommodating cavity 42. To have a certain gap between the cover plate 5 covered on the cover plate frame 6 and the accommodating cavity 42, there are two cases: the first case is that the height of the cover plate frame 6 is greater than the depth of the accommodating cavity 42, so that the cover plate frame 6 lifts the cover plate 5 covered thereon from the accommodating cavity 42 by a certain height, so that there is a certain gap between the cover plate 5 and the accommodating cavity 42; the second case is that the cross-sectional area of the cover plate 5 is smaller than that of the accommodating cavity 42, so that there is a certain gap between the side of the cover plate 5 placed in the accommodating cavity 42 and the side wall of the accommodating cavity 42. In this application, the second case is preferred, because the cover plate frame 6 and the cover plate 5 extending out of the accommodating cavity 42 of the bottom box main body 1 will cause the floor of the bathroom to be uneven, thereby causing a safety hazard, and the second case has no requirement on the height of the cover plate frame 6 and the cover plate 5, so that the upper surface of the cover plate 5 can be made to coincide with the upper surface of the accommodating cavity 42, thereby making the floor of the bathroom flat.

[0040] The drain holes 12 are multiple and arranged circumferentially along the bottom box main body 1. The bottom box main body 1 is provided with a drain passage 13, and the multiple drain holes 12 are all in communication with one end of the drain passage 13. The multiple water pipes 2 connected to the side wall of the mounting groove 11 are in communication with the other end of the drain passage 13. The bottom box main body 1 is provided with the drain passage 13, and the multiple drain holes 12 are arranged circumferentially along the bottom box main body 1. One end of the drain passage 13 is in communication with the multiple drain holes 12, and the other end is in communication with the multiple water pipes 2 connected to the side wall of the mounting groove 11. The multiple drain holes 12 are arranged to enable the water entering the bottom box main body 1 to be drained from the multiple drain holes 12 simultaneously, thereby accelerating the drainage speed of the bottom box. In addition, the multiple drain holes 12 are arranged circumferentially along the bottom box main body 1, so that water in each part of the bottom box main body 1 can flow into the drain holes 12, preventing the water in the bottom box main body 1 from not being drained completely.

[0041] The water in the bottom box main body 1 flows into the multiple drain holes 12, and then flows into the multiple water pipes 2 connected to the side wall of the mounting groove 11 through the drain passage 13 in the bottom box main body 1. The flow of water in the drain passage and the water pipes 2 also has a certain buffering effect, preventing the speed of the water being drained into the preset drain pipe from the drain hole 12 from being less than the speed of the water entering the drain hole 12, thereby causing water to accumulate in the bottom box main body 1. The arrangement of the drain passage 13 and the multiple water pipes 2 relieves the pressure of the drainage, because the flow of water in the drain passage 13 and the water pipes 2 also takes time, so that when the speed of the water being drained into the preset drain pipe from the drain hole 12 is less than the speed of the water entering the drain hole 12, the water can first enter the drain passage 13 and the water pipes 2, thereby preventing the water from accumulating in the bottom box main body 1.

[0042] The installation groove 11 is a rectangular installation groove 11, and the water pipes 2 are four pipes respectively connected with four side walls of the rectangular installation groove 11. The installation groove 11 is arranged in a rectangular shape, and one water pipe 2 is connected with each of the four side walls of the rectangular installation groove 11, so that the water in the bottom box body 1 is uniformly discharged from the four water pipes 2, preventing the uneven distribution of the water pipes 2 from causing the water in each part of the bottom box body 1 to have different discharge speeds, thereby slowing down the overall water discharge speed of the bottom box body 1.

[0043] The water pipe collector 3 is arranged at the center position of the four water pipes 2. The water pipe collector 3 is arranged at the center position of the four water pipes 2, so that the water flows from the four water pipes 2 to the water pipe collector 3 at equal distances, thereby ensuring that the water in the bottom box body 1 is uniformly discharged from the four water pipes 2 and does not gather in one part of the bottom box body 1. Moreover, the water pipe collector 3 is arranged at the center position of the four water pipes 2, so that the water discharge speeds of each part of the bottom box body 1 are equal, thereby accelerating the overall water discharge speed of the bottom box body 1.

[0044] The above-described content can be implemented individually or in various combinations, and these variants are within the protection scope of the present application.

[0045] It should be noted that, in this document, the terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device containing a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0046] Finally, it should be noted that the above examples are merely used to illustrate the technical solutions of the present application, and not to limit the same. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent features; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A prefabricated waterproof bathroom bottom box, characterized in that: The utility model provides a bottom box, including bottom box body (1), a plurality of water pipes (2) for draining water in the bottom box body (1) and water pipe collector (3) for collecting water in a plurality of water pipes (2) together and draining into the preset drain pipe, the installation groove (11) of penetrating bottom box body (1) is set up on the bottom box body (1), a plurality of water pipes (2) one end is connected with the side wall of installation groove (11) respectively, the other end is connected with water pipe collector (3) simultaneously, the water pipe collector (3) is equipped with the drain outlet for draining the water of collection into the preset drain pipe, the area of bottom box body (1) not being set up installation groove (11) is equipped with drain hole (12), the drain hole (12) in bottom box body (1) with a plurality of water pipes (2) is connected installation groove (11) side wall one end communication, for draining the water in bottom box body (1) into water pipe (2), Still include the support surrounding edge (4) that surrounds the bottom box body (1) four around, the first protruding portion (41) for installing wallboard is equipped on the support surrounding edge (4), the support surrounding edge (4) surrounds the bottom box body (1) four around and forms the containing cavity (42) for water to enter bottom box body (1), Still include the cover plate (5) for preventing large article to enter bottom box body (1) and the cover plate (5) are blocked, and the cover plate frame (6) for the fixed support of cover plate (5), the cover plate frame (6) is equipped on bottom box body (1), and the gap for water to pass through is formed between the cover plate (5) fixedly connected on the cover plate frame (6) and containing cavity (42); The second protruding portion (51) of the cover plate (5) is inserted into the insertion slot (61) of the cover plate frame (6). The top openings of the plurality of drain holes (12) are located at the top of the bottom box body (1), the cross-sectional area of the cover plate (5) is greater than the cross-sectional area of the cover plate frame (6), and the projection of the cover plate (5) in the vertical direction covers the area where the top openings of the plurality of drain holes (12) are located. The plurality of water pipes (2) extend in the horizontal direction, and the water pipe collector (3) is located at the center of the four water pipes (2).

2. The prefabricated waterproof bathroom bottom box according to claim 1, characterized in that: The first protruding portion (41) is circumferentially arranged along the support surrounding edge (4).

3. The prefabricated waterproof bathroom bottom box according to claim 1, characterized in that: The insertion slot (61) is circumferentially arranged along the cover plate frame (6), and the second protruding portion (51) is circumferentially arranged along the cover plate (5).

4. The prefabricated waterproof bathroom bottom box according to claim 1, characterized in that: The cross-sectional area of the cover plate (5) is less than the cross-sectional area of the containing cavity (42).

5. The prefabricated waterproof bathroom bottom box according to claim 1, characterized in that: The plurality of drain holes (12) are circumferentially arranged along the bottom box body (1), and the bottom box body (1) is provided with a drain passage (13), the plurality of drain holes (12) are in communication with one end of the drain passage (13), and the plurality of water pipes (2) connected to the side wall of the installation groove (11) are in communication with the other end of the drain passage (13).

6. The prefabricated waterproof bathroom bottom box according to claim 1, characterized in that: The installation slot (11) is a rectangular installation slot (11), and the water pipes (2) are four respectively connected with four side walls of the rectangular installation slot (11).

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