阅读说明：本技术 一种可移位式暗漏排水一体弯头 (Movable concealed drain drainage integrated elbow ) 是由 王水林 于 2021-09-07 设计创作，主要内容包括：本发明公开一种可移位式暗漏排水一体弯头,包括遮蔽盖和弯头体组成的一体弯头、PVC丝网垫,弯头体的入口端的身部为直段,遮蔽盖布设在弯头体直段下方的弯曲段处且使遮蔽盖的上端面与弯头体的直段相平行；遮蔽盖的外轮廓布设向下延伸的伸展壁,伸展壁上均布阵列多个开口宽度相等且将伸展壁下边线切除或将伸展壁下边线保留的豁口；伸展壁的下边线高于弯头体的出口端；PVC丝网垫的外径设置在伸展壁的内壁,使PVC丝网垫的内径与弯头体的弯曲段贴合、使PVC丝网垫的上端面与遮蔽盖的下端面贴合、使PVC丝网垫的下端面与伸展壁下边线相平齐。实现排污口的位移和改变排污口的角度的同时,使来自地砖层渗下的积水排进原始排污口,防止积水破坏防水层。(The invention discloses a movable blind drain drainage integrated elbow, which comprises an integrated elbow consisting of a shielding cover and an elbow body, and a PVC wire mesh pad, wherein the body part of the inlet end of the elbow body is a straight section; an extension wall extending downwards is distributed on the outer contour of the shielding cover, and a plurality of openings which have the same opening width and cut off the lower edge line of the extension wall or reserve the lower edge line of the extension wall are uniformly distributed on the extension wall; the lower edge of the extension wall is higher than the outlet end of the elbow body; the outer diameter of the PVC wire mesh pad is arranged on the inner wall of the extension wall, so that the inner diameter of the PVC wire mesh pad is attached to the bending section of the elbow body, the upper end face of the PVC wire mesh pad is attached to the lower end face of the shielding cover, and the lower end face of the PVC wire mesh pad is flush with the lower edge line of the extension wall. When realizing the displacement of drain and changing the angle of drain, make the ponding that comes from the brick layer infiltration and discharge original drain, prevent ponding destruction waterproof layer.)

1. The utility model provides an integrative elbow of drainage is leaked in can shifting formula secretly, includes integrative elbow (12), PVC wire mesh pad (16) of constituteing by shielding lid (2) and elbow body (1), its characterized in that: the body part of the inlet end (13) of the elbow body (1) is a straight section (14), the shielding cover (2) is arranged at a bent section (15) below the straight section (14) of the elbow body (1), and the upper end surface (2-1) of the shielding cover (2) is parallel to the straight section (14) of the elbow body (1);

an extension wall (3) extending downwards is distributed on the outer contour of the shielding cover (2), a plurality of openings (4) with the same width (B) and used for cutting off the lower edge of the extension wall (3) or reserving the lower edge of the extension wall (3) are uniformly distributed on the extension wall (3);

the lower edge line of the extension wall (3) is higher than the outlet end (17) of the elbow body (1);

the outer diameter (16-1) of the PVC wire mesh pad (16) is arranged on the inner wall of the extension wall (3), so that the inner diameter (16-3) of the PVC wire mesh pad (16) is attached to the bending section (15) of the elbow body (1), the upper end surface (16-2) of the PVC wire mesh pad (16) is attached to the lower end surface (2-2) of the shielding cover (2), and the lower end surface (16-4) of the PVC wire mesh pad (16) is flush with the lower edge line of the extension wall (3);

the number of inlet ends (13) is at least 1.

2. A displaceable blind drain integral elbow as claimed in claim 1, wherein: the outer diameter profile of the shielding cover (2) on the elbow body is circular, and the circular profile of the shielding cover (2) is provided with an extending wall (3) extending downwards.

3. A displaceable blind drain integral elbow as claimed in claim 2, wherein: the outer wall and/or the inner wall of the extension wall (3) is provided with a thread (18).

4. A displaceable blind drain integral elbow as claimed in claim 2, wherein: the center of the circle is concentric with the center of the outlet end (17) of the elbow body.

5. A displaceable blind drain integral elbow as claimed in claim 1, wherein: the outer contour of the shielding cover (2) on the elbow body (1) is oval.

6. A displaceable blind drain integral elbow as claimed in claim 5, wherein: the central line of the elliptical short semi-axis is arranged on the outer side of the vertical central line (19) of the elbow body (1).

7. A displaceable blind drain integral elbow as claimed in claim 5, wherein: the central line of the oval long semi-axis is coincided with the central line of the straight section (14) of the elbow body (1).

8. A drain structure of a displacement type sewage drain pipe, at least comprising a displacement type blind drain integrated elbow as claimed in any one of claims 1 to 7, wherein: the movable hidden-leakage drainage integrated elbow comprises a building original ground layer (5), a drainage pipe (6) arranged in the original ground layer, and a waterproof layer (7) which is arranged on the building original ground layer (5) and covers the drainage pipe (6), wherein the lower end face of an extending wall (3) of the movable hidden-leakage drainage integrated elbow is arranged on the waterproof layer (7), a shielding cover (2) of the movable hidden-leakage drainage integrated elbow is arranged at the upper part of a drainage outlet of the drainage pipe (6), the drainage outlet of the drainage pipe (6) is contained in the extending wall (3) and the shielding cover (2) of the movable hidden-leakage drainage integrated elbow, and the end part of the drainage outlet of the drainage pipe (6) is covered by a PVC wire mesh pad (16) of the movable hidden-leakage drainage integrated elbow.

9. A drain structure of a toilet drain, comprising the displacement type drain drainage structure of claim 1, wherein: the waterproof floor tile is characterized by further comprising a cement mortar layer (9) arranged on the waterproof layer (7) and a floor tile layer (10) arranged on the cement mortar layer (9).

10. A new sewage displacement device comprising a displaceable blind drain integral elbow according to claims 1-4, characterized in that: the drain pipe (6) is provided with threads (18) on the inner wall and/or the outer wall of the port, and the threads (18) of the movable blind drain integral elbow are connected with the threads (18) of the drain pipe (6).

Technical Field

The invention relates to a drainage elbow, in particular to a movable blind drain drainage integrated elbow.

Background

In the building industry, set up the drain in the building to the butt joint of waste fitting discharging and drain is implemented in later stage building decoration field. Generally, it is according to standard to set up the drain in the building, regard as the benchmark with certain building element in the building as the benchmark reference, give a theoretical accurate distance size between drain and building element reference benchmark, but at the in-process of implementing building and later stage decoration, because the accumulation error that produces during the construction makes this theoretical accurate distance size diminish, lead to the later stage in the installation and construction of drain implementation, take place to interfere the phenomenon between drain and the building element reference benchmark, the construction progress of decoration has been delayed, this kind of condition need change drain's model or can guarantee the smooth implementation of decoration after shifting the drain usually.

In the prior art, chinese patent publication No. CN213114835U discloses a novel pollution discharge displacement device, which is to correct the theoretical correct distance from the first interface of the pollution discharge displacement device to the building unit with reference to the standard by rotating the displacement of the pollution discharge displacement device. And secondly, the length of the outward distance value of the movable joint elbow can be adjusted to be within the range of 30-200 mm by adjusting the screwing length of the thread of the movable joint elbow on the inner wall of the elbow, and the theoretical correct distance is reduced by using the outward distance value of the movable joint elbow to correct the accumulated error at a narrow space.

Although the displacement and the angle of the sewage draining exit can be realized in the prior art, the problem that the waterproof layer at the original sewage draining exit is loosened and loses the waterproof function due to the fact that accumulated water seeped from the floor of the floor tile is easily accumulated at the sewage draining exit after the displacement and the angle are changed is urgently needed to be overcome, but the prior art does not disclose the problem.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the movable blind drain integrated elbow, so that accumulated water seeped from a floor of a floor tile is discharged into an original drain while the drain is displaced and the angle of the drain is changed, and the waterproof layer is prevented from being damaged by the accumulated water.

In order to overcome the technical problems, the invention adopts the technical scheme that:

the utility model provides an integrative elbow of drainage is leaked in can shifting formula secretly, includes integrative elbow, PVC wire mesh pad of constituteing by shielding lid and elbow body, its characterized in that: the body part of the inlet end of the elbow body is a straight section, the shielding cover is arranged at the curved section below the straight section of the elbow body, and the upper end surface of the shielding cover is parallel to the straight section of the elbow body;

an extension wall extending downwards is distributed on the outer contour of the shielding cover, and a plurality of openings which have the same opening width and cut off the lower edge line of the extension wall or reserve the lower edge line of the extension wall are uniformly distributed on the extension wall;

the lower edge of the extension wall is higher than the outlet end of the elbow body;

the PVC wire mesh pad is a circular cylinder, wherein the outer diameter of the PVC wire mesh pad is arranged on the inner wall of the extension wall, so that the inner diameter of the PVC wire mesh pad is attached to the bending section of the elbow body, the upper end face of the PVC wire mesh pad is attached to the lower end face of the shielding cover, and the lower end face of the PVC wire mesh pad is flush with the lower line of the extension wall.

The number of the inlet ends 13 is at least 1;

compared with the prior art, the invention has the beneficial effects that: when realizing the displacement of length and direction of height of drain and changing the angle of drain, make and come from the ponding drainage that the brick layer oozes and advance original drain, prevent ponding destruction waterproof layer. Meanwhile, the movable blind drain and drainage integrated elbow can be applied to various building structures.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a front view of a displaceable blind drain integrated elbow in embodiment 1.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a top view of the PVC wire mesh pad of example 2.

Fig. 5 is a sectional view taken along line a-a of fig. 4.

Fig. 6 is a front view of a displaceable blind drain integrated elbow of embodiment 2.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a left side view of fig. 6.

Fig. 9 is a front view of a displaceable blind drain integrated elbow of embodiment 3.

Fig. 10 is a top view of fig. 9.

FIG. 11 is a schematic structural view of example 4.

FIG. 12 is a schematic structural view of example 5.

FIG. 13 is a schematic structural view of example 6.

FIG. 14 is a schematic structural view of example 6.

FIG. 15 is a top view of the PVC wire mesh pad of example 6.

Fig. 16 is a schematic structural view of another displaceable blind drain integrated elbow in embodiment 3.

FIG. 17 is a schematic structural view of example 7.

Detailed Description

Example 1

As shown in fig. 1-3, a movable blind drain integrated elbow comprises an integrated elbow 12 composed of a shielding cover 2 and an elbow body 1, and a PVC wire mesh pad 16, wherein the body of an inlet end 13 of the elbow body 1 is a straight section 14, the shielding cover 2 is arranged at a bent section 15 below the straight section 14 of the elbow body 1, and an upper end face 2-1 of the shielding cover 2 is parallel to the straight section 14 of the elbow body 1;

the outer diameter profile of the shielding cover 2 is provided with an extending wall 3 extending downwards, a plurality of gaps 4 with the same opening width B are uniformly distributed on the extending wall 3, and the gaps 4 can exist in a mode of cutting off the lower edge line of the extending wall 3 or a mode of retaining the lower edge line of the extending wall 3.

The upper edge line of the opening 4 can be arranged in parallel with the lower end surface 2-2 of the shielding cover 2; the upper edge line of the notch 4 may also be arranged at a certain distance from the lower end face 2-2 of the shielding cover 2, and for this reason, the arrangement mode of the upper edge line of the notch 4 is not specifically limited in this embodiment. The lower edge of the extension wall 3 is higher than the outlet end 17 of the elbow body 1;

referring to fig. 3-5, the PVC wire mesh pad 16 is an elliptical ring cylinder, wherein the outer diameter 16-1 of the PVC wire mesh pad 16 is disposed on the inner wall of the extension wall 3, the inner diameter 16-3 of the PVC wire mesh pad 16 is fitted to the curved section 15 of the elbow body 1, the upper end surface 16-2 of the PVC wire mesh pad 16 is fitted to the lower end surface 2-2 of the shield cover 2, and the lower end surface 16-4 of the PVC wire mesh pad 16 is flush with the lower edge line of the extension wall 3.

Further, the outer contour of the shielding cover 2 on the elbow body 1 is an ellipse, and more specifically, the center line of the minor semi-axis of the ellipse is arranged outside the vertical center line 19 of the elbow body 1; the central line of the oval long semi-axis coincides with the central line of the straight section 14 of the elbow body 1.

Referring to fig. 11, the shielding cover 2 on the elbow body 1 has an oval outer contour, the lower end surface of the extension wall 3 is placed on the ground surface, the outlet end 17 of the elbow body 1 is inserted into the drain pipe, the shielding cover 2 blocks the drain pipe outlet, the accumulated water is filtered by the PVC wire mesh pad 16 from the notch 4 and then is discharged into the water inlet pipe, and the water-proof layer is prevented from being damaged by the accumulated water. PVC wire gauze pad (often in the floor mat of door of entering a family, PVC wire gauze pad 16 is the pad that certain thickness was woven into to the PVC silk to form anomalous pore organizational structure in the thickness of pad, the hole of its formation is convenient for make ponding enter into the drain pipe, blocks rubble granule in the ponding outside extending wall 3 simultaneously, during the implementation, purchases finished product PVC wire gauze pad 16 and tailors, tailors the back, with PVC wire gauze pad 16 put into shield cover 2 in can.

The central line of the short half shaft of the elliptical outline shielding cover 2 is arranged outside the vertical central line 19 of the elbow body 1, so that the elbow body 1 can realize steering in the drain pipe, a larger displacement can be formed at the drain outlet, the displacement realizes the compensation in the linear displacement direction and the angular displacement direction, the displacement can compensate the size error of the theoretical correct distance between the drain outlet and the reference standard of the building unit, and further the smooth construction is ensured.

Example 2

As shown in fig. 4-8, a movable blind drain integrated elbow comprises an integrated elbow 12 composed of a shielding cover 2 and an elbow body 1, and a PVC wire mesh pad 16, wherein the body of an inlet end 13 of the elbow body 1 is a straight section 14, the shielding cover 2 is arranged at a bent section 15 below the straight section 14 of the elbow body 1, and an upper end face 2-1 of the shielding cover 2 is parallel to the straight section 14 of the elbow body 1;

the outer diameter profile of the shielding cover 2 is provided with an extending wall 3 extending downwards, a plurality of gaps 4 which have the same opening width B and cut off the lower edge line of the extending wall 3 are uniformly distributed on the extending wall 3, and the upper edge line of each gap 4 is flush with the lower end surface 2-2 of the shielding cover 2;

furthermore, the outer contour of the shielding cover 2 on the elbow body is circular, the circular outer contour of the shielding cover 2 is provided with the extending wall 3 extending downwards, and the center of the circular shielding cover 2 is concentric with the center of the outlet end 17 of the elbow body.

Referring to fig. 3-5, the PVC wire mesh pad 16 is a circular cylinder, wherein the outer diameter 16-1 of the PVC wire mesh pad 16 is disposed on the inner wall of the extension wall 3, so that the inner diameter 16-3 of the PVC wire mesh pad 16 is attached to the bending section 15 of the elbow body 1, the upper end surface 16-2 of the PVC wire mesh pad 16 is attached to the lower end surface 2-2 of the shielding cover 2, and the lower end surface 16-4 of the PVC wire mesh pad 16 is flush with the lower edge line of the extension wall 3.

Referring to fig. 12, it can be known that the outer contour of the circular shielding cover 2 on the elbow body 1 is adopted, the extension wall 3 is placed on the ground surface, the outlet end 17 of the elbow body 1 is inserted into the drain pipe, the shielding cover 2 blocks the drain pipe outlet, the accumulated water is filtered from the opening 4 through the PVC wire mesh pad 16 and then is discharged into the water inlet pipe, and the center of the circular outer contour shielding cover 2 is the same as the center of the elbow body, so that the steering can be realized, and a small displacement can be formed at the drain outlet; the displacement realizes the compensation of the linear displacement direction and the compensation of the angular displacement direction, and the displacement can compensate the theoretical correct distance dimension error between the sewage draining outlet and the reference standard of the building unit, thereby ensuring the smooth implementation of construction.

Example 3

A displacement type blind drain integrated elbow is based on embodiment 2, and the outer wall and/or the inner wall of the extension wall 3 is provided with threads 18, so that the embodiment can be embodied in three structural forms: the first structure is that the outer wall of the extension wall 3 is provided with screw threads 18; the second structure is that the inner wall of the extension wall 3 is provided with screw threads 18; the third is that the inner wall and the outer wall of the extension wall 3 are both provided with threads 18;

referring to fig. 9-10, it can be seen that: fig. 9 and 10 show that the outer wall of the extension wall 3 is provided with a thread 18, the thread 18 is used for connecting a drain pipe with an internal thread, the elbow body 1 can realize steering through screwing connection of the thread 18 and the drain pipe with the internal thread, meanwhile, the opening 4 on the extension wall 3 is subjected to height adjustment, accumulated water can be filtered from the opening 4 through a PVC wire mesh pad 16 and then is discharged into the water inlet pipe, the direction of the inlet end 15 of the elbow body is changed through screwing connection of the thread 18 on the outer wall of the extension wall 3 and the drain pipe with the internal thread, further, angle displacement and displacement in the height direction are realized, and the displacement is used for compensating the size error of the theoretical correct distance between a sewage outlet and a reference datum of a building unit, and further ensuring smooth construction.

The second structure is that the inner wall of the extension wall 3 is provided with threads 18 for connecting a drain pipe with external threads, and the obtained technical effect is the same as that of the first structure;

in order to realize smooth connection with the drain pipe and improve interchangeability with the drain pipe, the third way is that the inner wall and the outer wall of the extension wall 3 are both provided with threads 18 to improve construction efficiency, and the obtained technical effect is the same as that of the first structure and the second structure.

Having described the first structure in detail and shown the precise structure in fig. 9-10, those skilled in the art can clearly understand and implement the second structure and the third structure of the present embodiment, and therefore, the second structure and the third structure will not be described in detail again in the present embodiment.

Example 4

As can be seen from fig. 11, the present invention also provides a drainage structure of a displacement type drainage pipe, which comprises the above-mentioned displacement type blind drain drainage integral elbow, further comprises a building original ground floor 5, a drainage pipe 6 arranged in the original ground floor, a waterproof layer 7 arranged on the building original ground floor 5 and covering the drainage pipe 6, wherein the lower end surface of the extension wall 3 of the movable hidden-leakage drainage integral elbow is arranged on the waterproof layer 7, and the shielding cover 2 of the movable hidden-leakage drainage integral elbow is arranged at the upper part of the drainage outlet of the drainage pipe 6, and the outlet of the drain pipe 6 is contained in the extending wall 3 and the shielding cover 2 of the displaceable blind drain integral elbow so that the end of the outlet of the drain pipe 6 is covered by the PVC wire mesh pad 16 of the displaceable blind drain integral elbow.

In specific implementation, any one of the movable blind drain and drain integrated elbows in the embodiments 1 to 3 can be adopted according to the interface structure of the drain pipe 6, the elbow body 1 is utilized to realize steering in the drain pipe 6, and meanwhile, displacement can be formed at the drain outlet, and the displacement can compensate the theoretically correct distance dimension error between the drain outlet and the reference standard of the building unit, so that the smooth implementation of construction is ensured.

Example 5

As shown in fig. 12, the present invention further provides a drain outlet structure of a toilet drain outlet, in example 4, a cement mortar layer 9 is laid on the waterproof layer 7, a floor tile layer 10 is laid on the cement mortar layer 9, when water seeps from the floor tile layer 10, the water seeps onto the waterproof layer 7, and the water flows into a gap formed by the elbow body 1 and the drain pipe 6 through the PVC wire mesh pad 16 from the gap 4, so that accumulated water seeped from the floor tile layer is drained into the drain pipe 6, and the waterproof layer is prevented from being damaged by the accumulated water. The crushed stone particles in the water are blocked outside the PVC wire mesh pad 16; the displacement of the drain outlet and the change of the angle of the drain outlet are realized, and meanwhile, the accumulated water seeped from the floor brick layer is discharged into the drain pipe arranged on the original ground, so that the accumulated water is prevented from damaging the waterproof layer. The drain outlet structure of the toilet drain outlet eliminates the dimension error of the theoretically correct distance between the drain outlet and the reference standard of the building unit, so that the abutting installation of the drain device 20 and the drain outlet can be smoothly completed.

Example 6

As shown in fig. 13-14, the present invention further provides a novel sewage displacement device, which comprises a displaceable blind drain integral elbow according to embodiment 3, and a drain pipe 6 with threads 18 on the inner wall and/or outer wall of the port, wherein the threads 18 of the displaceable blind drain integral elbow are connected with the threads 18 of the drain pipe 6.

The height of the gap 4 is adjusted by adjusting the screwing distance between the thread 18 of the movable blind drain integrated elbow and the thread 18 of the drain pipe 6, so that the gap 4 is shielded by the wall of the drain pipe 6, the PVC wire mesh pad 16 is compressed and attached to the pipe end opening of the drain pipe 6, and the water in the container 8 is prevented from running off;

the height of the gap 4 is adjusted by adjusting the screwing distance between the thread 18 of the displaceable hidden-leakage drainage integrated elbow and the thread 18 of the drainage pipe 6, so that the gap 4 is higher than the pipe port of the drainage pipe 6, the PVC wire mesh pad 16 is in a fluffy state at the pipe port of the drainage pipe 6, the water in the container 8 flows into the gap 4 and is filtered by the PVC wire mesh pad 16 to be drained into the drainage pipe 6, and meanwhile, special-shaped solid objects are blocked outside the gap 4;

the inlet end 13 of the elbow body 1 is blocked by the end enclosure 11, the inlet end 13 of the elbow body 1 can be arranged in the container 8 or outside the container 8, and the outflow direction of the sewage in the container 8 can be realized by opening the end enclosure 11 or adjusting the height of the opening 4; the structure is suitable for application in a fish pond and a bathing pool, fish and shrimps in the fish pond can be remained in the fish pond by adjusting the height of the opening 4, and sewage in the fish pond is discharged from the opening 4; the sewage in the bath can be discharged by adjusting the height of the notch 4, so that people can conveniently search the valuable ornaments left in the bath, and meanwhile, the valuable ornaments left in the bath can not be discharged by the notch 4.

Similarly, when the pipe end of the drainage pipe 6 is internally threaded, the thread of the extending wall 3 is externally threaded, but the PVC wire mesh pad 16 is cut into an external diameter with a flange 21, the structure of the flange 21 is shown in FIG. 15, and the flange 21 is placed at the wall thickness 22 formed in the extending wall 3 of the gap 4, as shown in FIG. 16; the flange 21 serves as a stop for the PVC wire mesh pad 16, preventing it from falling off. Similarly, the height of the gap 4 is adjusted by adjusting the screwing distance between the thread 18 of the displaceable concealed drain drainage integral elbow and the thread 18 of the drainage pipe 6, so that the gap 4 is higher than the pipe end opening of the drainage pipe 6, the flange of the PVC wire mesh pad 16 is clamped at the wall thickness 22 formed in the extension wall 3, the water in the container 8 flows into the gap 4 and is filtered by the PVC wire mesh pad 16 and then flows into the drainage pipe 6, and meanwhile, special-shaped solid objects are blocked outside the gap 4.

Example 7

In this embodiment, based on embodiment 1, another displaceable dark-leakage drainage integral elbow is evolved, and the specific structure is shown in fig. 17, in which a straight pipe 22 penetrates through the curved section 15 of the elbow body 1, the straight pipe 22 and the curved section 15 of the elbow body 1 penetrate through an elliptical inner flow hole 23, the elliptical inner flow hole 23 is larger than the areas of the inlet end 13 and the outlet end, so that the drainage condition can be improved, the inlet end 13 of the straight pipe 22 is concentric with the outlet end 17 of the elbow body 1, and other structural features are the same as those of embodiment 1; the inlet end 13 of the straight pipe 22 is used for connecting a sewer pipe of a toilet or a sewer pipe of a hand basin, and the inlet end 13 of the straight section 14 of the elbow body 1 is used for a floor drain pipe; therefore, the elliptical outer contour of the shielding cover 2 is utilized to enable the elbow body 1 to realize steering in the drainage pipe, and simultaneously, a larger displacement can be formed at the drainage port, the displacement realizes compensation in the linear displacement direction and compensation in the angular displacement direction, and also considers the theoretical correct distance size error compensation between the inlet end 13 of the straight pipe 22 and the inlet end 13 of the elbow body 1 and the building unit reference datum, thereby ensuring the smooth construction. The outlet end 17 of the elbow body 1 is inserted into the drain pipe, the shielding cover 2 blocks the drain outlet of the drain pipe, accumulated water is filtered by the PVC wire mesh pad 16 from the notch 4 and then is discharged into the water inlet pipe, and the water-proof layer is prevented from being damaged by the accumulated water.

It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.