A pre-buried multifunctional connecting piece for draining water in a backfill area and a construction method thereof

Abstract

The application relates to the technical field of drain pipes, and discloses a pre-buried multifunctional connecting piece for draining water accumulated in a backfill area and a construction method, which comprises a pre-buried pipe piece, a waterproof closing-plate ring and a protective cover. The lower end of the pre-buried pipe piece is provided with a base, the position close to the upper end of the pre-buried pipe piece is provided with a closing disc, and the closing disc is inclined downward from outside to inside. The waterproof closing-plate ring comprises a threaded sleeve and a pressing plate. The threaded sleeve is threadedly connected with the outer wall of the upper end of the pre-buried pipe piece. The pressing plate extends radially from the lower end of the threaded sleeve, and a waterproof roll closing groove is formed between the pressing plate and the closing disc. The outer end of the pressing plate extends vertically upward to form an extension part facilitating the rotation of the waterproof closing-plate ring. The pre-buried multifunctional connecting piece for draining water accumulated in a backfill area and the construction method can solve the problem that the water accumulated in the backfill area cannot be drained in time in the prior art, so that the water in the water room can seep into the wall foot of the adjacent room.

Description

Technical Field

[0001] This invention relates to the field of drainage pipe fittings technology, specifically to a multi-functional connector for pre-embedding water accumulation in the backfill area of ​​a drainage slab and its construction method. Background Technology

[0002] With the increasing number of construction projects, there are many cases of water leakage in rooms. The causes of leakage are also numerous, and construction companies have therefore carried out a lot of waterproofing repairs. The cost of repairing water leakage in rooms is also considerable, and the resulting losses are incalculable.

[0003] The existing construction method for the backfill area of ​​the water-bearing room with lowered slab is as follows: structural slab → waterproof construction → water tightness test → installation of drainage pipes → construction of filling layer in the backfill area of ​​the lowered slab → construction of concrete subbase → laying of surface tiles.

[0004] The main causes of leakage in rooms with water are as follows:

[0005] The existing rooms with water are waterproofed using waterproof membrane, which has a good waterproofing effect. However, this good waterproofing effect also prevents water from draining from the backfill area of ​​the lowered floor slab in the rooms with water. As a result, the backfill area remains saturated for a long time. Over time, the water in the backfill area will seep into the base of the walls of the adjacent rooms. Moreover, the leak points are difficult to find, and repairing the leaks is very troublesome. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-functional connector for pre-embedding water accumulation in the backfill area of ​​a drainage slab and a construction method thereof, in order to solve at least one of the aforementioned problems in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage plate includes a pre-embedded pipe fitting, a waterproof sealing plate ring, and a protective cover. The lower end of the pre-embedded pipe fitting is provided with a base, and a sealing plate is provided near the upper end of the pre-embedded pipe fitting. The sealing plate is inclined downward from the outside to the inside.

[0009] The waterproof sealing ring includes a threaded sleeve and a pressure plate. The threaded sleeve is threadedly connected to the upper outer wall of the pre-embedded pipe fitting. The pressure plate extends radially from the lower end of the threaded sleeve, and a waterproof membrane sealing groove is formed between the pressure plate and the sealing disc. The outer end of the pressure plate extends vertically upward to form an extension that facilitates the rotation of the waterproof sealing ring. The upper end of the extension is higher than the upper end of the pre-embedded pipe fitting. An inner window is provided on the extension, and an outer window is provided on the side wall of the protective cover. After the protective cover is fastened onto the extension, the inner window and the outer window are connected.

[0010] In this technical solution, by setting this connector in the backfill area of ​​the lowered slab, and because the pre-embedded pipe has a closing plate near its upper end, which slopes downwards from the outside to the inside, it can achieve drainage of accumulated water without affecting the closing of the waterproof membrane, guiding the accumulated water in the backfill area of ​​the lowered slab to the closing plate; since the waterproof closing pressure plate ring includes a threaded sleeve and a pressure plate, the threaded sleeve is threaded to the upper outer wall of the pre-embedded pipe, the pressure plate extends radially from the lower end of the threaded sleeve, and a waterproof membrane closing groove is formed between the pressure plate and the closing plate, and the outer end of the pressure plate extends vertically upwards to form an extension part that facilitates the rotation of the waterproof closing pressure plate ring, through Rotating the waterproof sealing ring allows for the tightening of the waterproof membrane, ensuring a secure seal. Since the extension has an inner window and the protective cover has an outer window, the inner and outer windows connect after the protective cover is fastened to the extension, creating a water flow channel inside the cover. Because the upper end of the extension is higher than the upper end of the embedded pipe, this water flow channel directly connects to the inside of the embedded pipe, connecting the lower end of the embedded pipe to the drain pipe. This ensures that accumulated water in the lowered backfill area can be drained promptly, solving the problem of water seeping from the wet room to the base of the adjacent room.

[0011] Furthermore, in order to simultaneously drain indoor water, the inner side of the pre-embedded pipe fitting has an upper hole and a lower hole. The inner diameter of the upper hole is larger than that of the lower hole. The lower end of the lower hole has a limiting platform. Multiple pipe wall ribs are provided circumferentially on the inner side of the upper hole. The inner ends of the pipe wall ribs are flush with the hole wall of the lower hole, and gap channels are formed between adjacent pipe wall ribs.

[0012] When indoor water needs to be drained simultaneously, the inner side of the pre-embedded pipe fitting has an upper hole and a lower hole. The inner diameter of the upper hole is larger than that of the lower hole, and the lower end of the lower hole has a limiting platform. The setting of the limiting platform facilitates the installation of the upper drainage pipe. Furthermore, since the inner side of the upper hole has multiple pipe wall ribs, the inner end of the pipe wall ribs is flush with the hole wall of the lower hole. A gap channel is formed between adjacent pipe wall ribs, which is connected to the water flow channel. Then, by installing the upper drainage pipe, the gap channel is connected to the inside of the pre-embedded pipe fitting. Thus, it is possible to drain the accumulated water in the lowered slab backfill area in a timely manner while also draining indoor water.

[0013] Furthermore, to facilitate the installation of the upper drain pipe, a movable washer is also included. The upper end of the movable washer is located inside the upper hole. The movable washer has multiple openings in the circumferential direction. The lower end of the movable washer abuts against the limiting platform. The upper end of the movable washer is connected to the lower end of the upper drain pipe. When the upper drain pipe is installed, the gap channel is connected to the interior of the pre-embedded pipe fitting through the openings.

[0014] Furthermore, to facilitate the installation of the movable washer and prevent inconvenience caused by incorrect installation, both ends of the movable washer are provided with openings. That is, the movable washer can be installed in one step from any direction inside the embedded pipe fitting, further improving the convenience of the upper drainage pipe installation.

[0015] Furthermore, to facilitate the connection and installation with the drain pipe, the inner side of the pre-embedded pipe fitting is provided with a limiting groove for easy connection with the drain pipe, and the limiting groove is located below the lower hole.

[0016] Furthermore, in order to achieve better waterproofing, a water-stop ring is provided on the outside of the pre-embedded pipe fitting. The water-stop ring has a retaining edge that protrudes upward.

[0017] Furthermore, in order to better install the embedded pipe fittings within the structural layer and ensure the stability of the embedded pipe fittings' position, the base is provided with multiple fixed supports extending radially. The ends of the fixed supports extend out of the base and are fixedly connected to the structural layer.

[0018] Furthermore, in order to improve the structural strength of the fixed support, the fixed support includes radially extending ribs.

[0019] Furthermore, to facilitate water tightness testing, plugs are also included for sealing the ports of the pre-embedded pipe fittings.

[0020] Furthermore, in order to simultaneously install the upper drain pipe and the protective cover, the protective cover is provided with a through hole to facilitate the passage of the upper drain pipe.

[0021] This invention also provides a drainage construction method for a backfill area of ​​a drainage slab, comprising the aforementioned multi-functional connector for pre-embedded water accumulation in the backfill area of ​​the drainage slab, including the following steps:

[0022] S1: Structural layer construction;

[0023] S2: Install the pre-embedded pipe fittings in the structural layer;

[0024] S3: Construction of the slope-finding layer;

[0025] S4: Waterproof membrane construction: Tighten the waterproof membrane end to the waterproof membrane end groove, and then tighten the waterproof end pressure plate ring until the waterproof membrane is pressed tightly.

[0026] S5: Install a plug at the port of the pre-embedded pipe fitting;

[0027] S6: Water tightness test;

[0028] S7: Install the upper drain pipe and protective cover, or install the protective cover and the lower drain pipe at the same time;

[0029] S8: Construction of the filling layer in the backfill area of ​​the lowered slab;

[0030] S9: Construction of concrete subbase layer;

[0031] S10: Paving surface tiles.

[0032] The beneficial effects of this invention are as follows: In this technical solution, by setting this connector in the backfill area of ​​the lowered slab, and because the pre-embedded pipe is provided with a closing plate near its upper end, and the closing plate is inclined downward from the outside to the inside, it can achieve the drainage of accumulated water without affecting the closing of the waterproof membrane, guiding the accumulated water in the backfill area of ​​the lowered slab to the closing plate; because the waterproof closing pressure plate ring includes a threaded sleeve and a pressure plate, the threaded sleeve is threadedly connected to the upper outer wall of the pre-embedded pipe, the pressure plate extends radially from the lower end of the threaded sleeve and forms a waterproof membrane closing groove between the pressure plate and the closing plate, and the outer end of the pressure plate extends vertically upward to form an extension that facilitates the rotation of the waterproof closing pressure plate ring. The extension section, through rotating the waterproof sealing ring, can compress the waterproof membrane, ensuring a tight seal. Since the extension section has an inner window and the protective cover has an outer window, after the protective cover is fastened to the extension section, the inner and outer windows connect, forming a water flow channel inside the protective cover. Because the upper end of the extension section is higher than the upper end of the embedded pipe, this water flow channel directly connects to the inside of the embedded pipe, connecting the lower end of the embedded pipe to the drain pipe. This ultimately allows water accumulated in the lowered backfill area to be drained promptly, solving the problem of water seeping from the wet room to the base of the adjacent room. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the planar structure in this invention;

[0034] Figure 2 This is a structural diagram showing the installation position relationship of some components in this invention;

[0035] Figure 3 This is a schematic diagram of the movable washer ring in its installation state according to the present invention;

[0036] Figure 4 This is a schematic cross-sectional view of the present invention;

[0037] Figure 5 This is a schematic diagram of the installation positions of the upper drain pipe and the movable washer ring in this invention;

[0038] Figure 6 This is a schematic diagram of a structure in which an opening is provided on the upper drainage pipe in this invention;

[0039] Figure 7 This is a schematic diagram of another type of opening provided on the upper drainage pipe in this invention;

[0040] Figure 8This is a schematic diagram of the first drainage route in this invention;

[0041] Figure 9 This is a schematic diagram of the second drainage route in this invention;

[0042] Figure 10 This is a schematic diagram of the third drainage route in this invention;

[0043] Figure 11 This is a schematic diagram of the fourth drainage route in this invention;

[0044] Figure 12 This is a schematic diagram of the fifth drainage route in this invention;

[0045] Figure 13 This is a schematic diagram of the water tightness test in this invention;

[0046] Figure 14 This is a three-dimensional structural diagram of one usage state of the present invention;

[0047] Figure 15 This is a three-dimensional structural diagram of another usage state of the present invention;

[0048] Figure 16 This is an exploded view of the water tightness test state in this invention;

[0049] Figure 17 This is a schematic diagram of the movable washer ring in this invention;

[0050] Figure 18 This is a schematic diagram of the protective cover in this invention;

[0051] Figure 19 This is a schematic diagram of the structure under the water tightness test state in this invention;

[0052] Figure 20 This is a schematic diagram of a drainage state in the present invention;

[0053] Figure 21 This is a schematic diagram of another drainage state in the present invention.

[0054] In the diagram: 1. Embedded pipe fitting; 1.1. Upper hole; 1.2. Lower hole; 1.3. Limiting platform; 1.4. Pipe wall rib; 1.5. Gap channel; 1.6. Step surface; 1.7. Horizontal line; 1.8. External thread; 2. Waterproof sealing plate ring; 2.1. Threaded sleeve; 2.2. Pressure plate; 3. Protective cover; 3.1. Outer window; 4. Base; 5. Sealing plate; 6. Waterproof membrane sealing groove; 7. Extension; 7.1. Inner window; 7.2. Open end; 7.3. Handle tooth; 8. Upper drain pipe; 8.1. Opening; 9. Inspection port; 10. Movable washer ring; 10. Opening; 11. Lower drain pipe; 12. Limiting groove; 13. Waterproof ring; 14. Edge retainer; 16. Fixed support leg; 17. Rib; 18. Plug; 19. Plug joint; 20. Through hole; 22. Waterproof membrane. Detailed Implementation

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0056] Example 1:

[0057] like Figures 1-21 As shown, this embodiment provides a multi-functional connector for pre-embedded water accumulation in the backfill area of ​​the drainage plate, including a pre-embedded pipe fitting 1, a waterproof sealing plate ring 2, and a protective cover 3. Preferably, the pre-embedded pipe fitting 1, the waterproof sealing plate ring 2, and the protective cover 3 can be made of PVC material. The lower end of the pre-embedded pipe fitting 1 is provided with a base 4, and the pre-embedded pipe fitting 1 is provided with a sealing plate 5 near its upper end. The sealing plate 5 is inclined downward from the outside to the inside.

[0058] The waterproof sealing ring 2 includes a threaded sleeve 2.1 and a pressure plate 2.2. The threaded sleeve 2.1 is threadedly connected to the upper outer wall of the embedded pipe fitting 1, that is, the upper outer wall of the embedded pipe fitting 1 is provided with an external thread 1.8, such as... Figure 3 As shown, the pressure plate 2.2 extends radially from the lower end of the threaded sleeve 2.1, and a waterproof membrane sealing groove 6 is formed between the pressure plate 2.2 and the sealing disc 5. The outer end of the pressure plate 2.2 extends vertically upward to form an extension 7 that facilitates the rotation of the waterproof sealing pressure plate ring 2. The upper end of the extension 7 is higher than the upper end of the embedded pipe fitting 1, as shown. Figure 16 As shown, the extension 7 is provided with an inner window 7.1. Preferably, a plurality of inner windows 7.1 are provided at equal intervals along the circumference of the extension 7, such as... Figure 15As shown, the protective cover 3 has an outer window 3.1 on its side wall. Preferably, multiple outer windows 3.1 are provided at equal intervals along the outer wall of the protective cover 3. After the protective cover 3 is fastened to the extension 7, the inner window 7.1 communicates with the outer window 3.1. Preferably, the number of multiple inner windows 7.1 and multiple outer windows 3.1 are the same and correspond one-to-one. It should be noted that the upper end of the inner window 7.1 is an open end 7.2, and a handle tooth 7.3 is formed between adjacent inner windows 7.1 to facilitate hand operation for turning the waterproof closing pressure plate ring 2.

[0059] In this technical solution, by setting this connector in the backfill area of ​​the lowered slab, and because the pre-embedded pipe fitting 1 has a closing plate 5 near its upper end, which slopes downwards from the outside to the inside, the accumulated water can be drained without affecting the closing of the waterproof membrane, guiding the accumulated water in the backfill area of ​​the lowered slab into the closing plate 5; since the waterproof closing pressure plate ring 2 includes a threaded sleeve 2.1 and a pressure plate 2.2, the threaded sleeve 2.1 is threadedly connected to the upper outer wall of the pre-embedded pipe fitting 1, the pressure plate 2.2 extends radially from the lower end of the threaded sleeve 2.1, and a waterproof membrane closing groove 6 is formed between the pressure plate 2.2 and the closing plate 5, and the outer end of the pressure plate 2.2 extends vertically upwards to form an extension 7 that facilitates the rotation of the waterproof closing pressure plate ring 2. By rotating the waterproof sealing ring 2, the waterproof membrane can be pressed tightly, ensuring the sealing effect of the waterproof membrane. Since the extension 7 has an inner window 7.1 and the protective cover 3 has an outer window 3.1 on its side wall, after the protective cover 3 is fastened to the extension 7, the inner window 7.1 and the outer window 3.1 are connected, forming a water flow channel inside the protective cover 3. Because the upper end of the extension 7 is higher than the upper end of the embedded pipe 1, this water flow channel directly connects to the inside of the embedded pipe 1, connecting the lower end of the embedded pipe 1 to the drain pipe 11. This ultimately allows the accumulated water in the lowered slab backfill area to be drained in a timely manner, thus solving the problem of water seeping from the water-bearing room to the basement wall. It should be noted that this connector is not limited to drainage in the lowered slab backfill area of ​​water-bearing rooms, but can also be used on water-accumulating areas on the waterproof layer of the basement roof.

[0060] Example 2:

[0061] This embodiment is an optimization based on the above embodiment 1.

[0062] like Figure 5 As shown, in order to simultaneously drain indoor water, the inner side of the pre-embedded pipe fitting 1 has an upper hole 1.1 and a lower hole 1.2. The inner diameter of the upper hole 1.1 is larger than the inner diameter of the lower hole 1.2. A stepped surface 1.6 is formed between the upper hole 1.1 and the lower hole 1.2. The lower end of the lower hole 1.2 has a limiting platform 1.3. Multiple pipe wall ribs 1.4 are circumferentially arranged on the inner side of the upper hole 1.1. Preferably, six pipe wall ribs 1.4 are evenly arranged circumferentially. The inner end of the pipe wall ribs 1.4 is flush with the hole wall of the lower hole 1.2. Figure 16 As shown, gap channels 1.5 are formed between adjacent pipe wall ribs 1.4, that is, there are six gap channels 1.5. The lower end of the gap channel 1.5 is a closed end, which is also the stepped surface 1.6. It should be noted that the setting of the pipe wall ribs 1.4 can ensure the width of the gap channels 1.5. At the same time, since the inner end of the pipe wall ribs 1.4 is flush with the hole wall of the lower hole 1.2, when installing the upper drain pipe 8, the pipe wall ribs 1.4 and the hole wall of the lower hole 1.2 can work together to install and fix the upper drain pipe 8. It should be noted that the outer diameter of the upper drain pipe 8 matches the inner diameter of the lower hole 1.2.

[0063] When indoor water needs to be drained simultaneously, the inner side of the pre-embedded pipe fitting 1 has an upper hole 1.1 and a lower hole 1.2. The inner diameter of the upper hole 1.1 is larger than that of the lower hole 1.2. The lower end of the lower hole 1.2 has a limiting platform 1.3. The setting of the limiting platform 1.3 facilitates the installation of the upper drain pipe 8. Furthermore, the inner side of the upper hole 1.1 is provided with multiple pipe wall ribs 1.4. The inner end of the pipe wall ribs 1.4 is flush with the hole wall of the lower hole 1.2. The gap channel 1.5 is formed between adjacent pipe wall ribs 1.4. The gap channel 1.5 is connected to the water flow channel. Then, by installing the upper drain pipe 8, the gap channel 1.5 is connected to the interior of the pre-embedded pipe fitting 1. Thus, the water accumulated in the lowered slab backfill area can be drained in a timely manner, and indoor water can also be drained. At the same time, the setting of the gap channel 1.5 can also achieve the air venting effect in the lowered slab backfill area. The air venting path is the same as above.

[0064] Example 3:

[0065] This embodiment is an optimization based on the above embodiment 1.

[0066] like Figure 17 As shown, to facilitate the installation of the upper drain pipe 8, a movable washer 10 is also included. The upper end of the movable washer 10 is located inside the upper hole 1.1. The movable washer 10 has multiple openings 10.1 circumferentially. Preferably, in order to achieve a smoother drainage effect while ensuring the structural strength of the movable washer 10, such as... Figure 5 As shown, the lower end of the opening 10.1 is flush with the horizontal line 1.7 of the step surface 1.6. The lower end of the movable washer 10 abuts against the limiting platform 1.3. The upper end of the movable washer 10 is connected to the lower end of the upper drain pipe 8. When the upper drain pipe 8 is installed, the gap channel 1.5 is connected to the interior of the pre-embedded pipe fitting 1 through the opening 10.1. It should be noted that the outer diameter of the movable washer 10 matches the inner diameter of the lower hole 1.2.

[0067] It should be noted that during the actual construction process, such as Figure 6 , Figure 7As shown, an opening 8.1 can be directly set at the corresponding position on the upper drain pipe 8 to connect the gap channel 1.5 with the interior of the pre-embedded pipe fitting 1. Specifically, to achieve a smoother drainage effect, the requirements for setting the opening 8.1 on the upper drain pipe 8 are: the lower end of the opening 8.1 must be below or flush with the horizontal line 1.7 of the step surface 1.6. Of course, the specific shape of the opening 8.1 can be any shape, such as a circular hole, a square hole, or a U-shaped hole. Preferably, there are eight openings 8.1, and the eight openings 8.1 are evenly distributed along the circumference of the pipe wall of the upper drain pipe 8, and the diameter of the opening 8.1 is 10mm.

[0068] It should be noted that when the upper drain pipe 8 is installed directly, the lower end of the upper drain pipe 8 abuts against the limiting platform 1.3, and then glue is used to fix the upper drain pipe 8 and the lower hole 1.2.

[0069] In this embodiment, when the movable washer ring 10 is used, there is no need to set an opening at the corresponding position on the upper drain pipe 8, and the gap channel 1.5 can be connected to the inside of the pre-embedded pipe fitting 1. Therefore, the installation of the upper drain pipe 8 is more convenient.

[0070] Example 4:

[0071] This embodiment is an optimization based on the above embodiment 3.

[0072] To facilitate the installation of the movable washer 10 and prevent inconvenience caused by incorrect installation, both ends of the movable washer 10 are provided with openings 10.1. That is, the movable washer 10 can be installed in one step from any direction inside the pre-embedded pipe fitting 1, further improving the convenience of installing the upper drainage pipe 8.

[0073] Example 5:

[0074] This embodiment is an optimization based on the above embodiment 1.

[0075] like Figure 5 As shown, in order to facilitate the installation of the drain pipe 11, the inner side of the pre-embedded pipe fitting 1 is provided with a limiting groove 12 to facilitate the connection with the drain pipe 11. The limiting groove 12 is located below the lower hole 1.2.

[0076] like Figure 13 As shown, during the specific implementation process, an inspection port 9 can be set below the drain pipe 11 to check the sealing status of the upper port of the pre-embedded pipe fitting 1 during the water tightness test.

[0077] Example 6:

[0078] This embodiment is an optimization based on the above embodiment 1.

[0079] like Figure 5 As shown, to achieve better waterproofing, a water-stop ring 13 is provided on the outer side of the embedded pipe fitting 1. The water-stop ring 13 has a retaining edge 14, which protrudes upward. Preferably, to improve the overall structural strength of the embedded pipe fitting 1, the thickness of the pipe wall between the sealing plate 5 and the water-stop ring 13 gradually increases from bottom to top.

[0080] Example 7:

[0081] This embodiment is an optimization based on the above embodiment 1.

[0082] like Figure 14 As shown, in order to better install the pre-embedded pipe fitting 1 in the structural layer and ensure the stability of the position of the pre-embedded pipe fitting 1, multiple fixed supports 16 are provided radially on the base 4. The ends of the fixed supports 16 extend out of the base 4. Preferably, four fixed supports 16 are evenly arranged around the circumference, and the ends of the fixed supports 16 are fixedly connected to the structural layer by fasteners.

[0083] Preferably, in order to improve the structural strength of the fixed leg 16, the fixed leg 16 includes radially extending ribs 17.

[0084] Example 8:

[0085] This embodiment is an optimization based on the above embodiment 1.

[0086] like Figure 16 In terms of details, in order to facilitate the water tightness test, it also includes a plug 18 for sealing the port of the pre-embedded pipe fitting 1.

[0087] Preferably, in order to facilitate the installation of the plug 18, the upper end of the pipe wall rib 1.4 has a plug interface 19 for easy installation of the plug 18. Preferably, the plug 18 is made of rubber and can be reused. It is used to seal the upper port of the pre-embedded pipe fitting 1 before the water tightness test.

[0088] Example 9:

[0089] This embodiment is an optimization based on the above embodiment 1.

[0090] like Figure 18 As shown, in order to simultaneously install the upper drain pipe 8 and the protective cover 3, the protective cover 3 is provided with a through hole 20 to facilitate the passage of the upper drain pipe 8. It should be noted that, as... Figure 12 and Figure 15 As shown, when it is only used to drain the water in the backfill area of ​​the lower plate, there is no need to connect the upper drain pipe 8. Therefore, the top of the protective cover 3 is a closed end with no through hole design.

[0091] Example 10:

[0092] This invention also provides a drainage construction method for a backfill area of ​​a drainage slab, comprising a multi-functional connector for pre-embedding water accumulation in the backfill area of ​​the drainage slab, including the following steps:

[0093] S1: Structural layer construction;

[0094] S2: Install the embedded pipe fitting 1 inside the structural layer;

[0095] S3: Construction of the slope-finding layer;

[0096] S4: Waterproof membrane 22 construction: Tighten the waterproof membrane 22 into the waterproof membrane end groove 6, and then tighten the waterproof end pressure plate ring 2 until the waterproof membrane is pressed. It should be noted that an additional layer of waterproof membrane can be added at the end plate 5 to increase the thickness of the waterproof layer at this point, thereby improving the end effect of the waterproof membrane 22.

[0097] S5: Install plug 18 on the port of the pre-embedded pipe fitting 1;

[0098] S6: Water tightness test;

[0099] S7: Install the drain pipe and protective cover, or install the protective cover, specifically, such as... Figures 9-11 As shown, when it is necessary to drain indoor water, both the drain pipe 8 and the protective cover 3 need to be installed simultaneously. The protective cover 3 has a through hole 20. Figure 12 and Figure 15 As shown, when the drain is only used to drain water from the backfill area of ​​the lowered slab, there is no need to connect the upper drain pipe 8; only the protective cover 3 needs to be installed. In this case, the top of the protective cover 3 is a closed end with no through holes. In both of the above cases, the lower drain pipe 11 needs to be installed.

[0100] S8: Construction of the filling layer in the backfill area of ​​the lowered slab;

[0101] S9: Construction of concrete subbase layer;

[0102] S10: Paving surface tiles.

[0103] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab, characterized in that: It includes embedded pipe fittings, waterproof sealing plate rings and protective covers. The lower end of the embedded pipe fittings is provided with a base, and a sealing plate is provided near the upper end of the embedded pipe fittings. The sealing plate is inclined downward from the outside to the inside. The waterproof sealing ring includes a threaded sleeve and a pressure plate. The threaded sleeve is threadedly connected to the upper outer wall of the pre-embedded pipe fitting. The pressure plate extends radially from the lower end of the threaded sleeve, and a waterproof membrane sealing groove is formed between the pressure plate and the sealing disc. The outer end of the pressure plate extends vertically upward to form an extension that facilitates the rotation of the waterproof sealing ring. The upper end of the extension is higher than the upper end of the pre-embedded pipe fitting. An inner window is provided on the extension, and an outer window is provided on the side wall of the protective cover. After the protective cover is fastened onto the extension, the inner window and the outer window communicate with each other.

2. The multi-functional connector for pre-embedded water accumulation in the backfill area of ​​the drainage plate according to claim 1, characterized in that: The embedded pipe fitting has an upper hole and a lower hole on its inner side. The inner diameter of the upper hole is larger than that of the lower hole. The lower end of the lower hole has a limiting platform. Multiple pipe wall ribs are provided circumferentially on the inner side of the upper hole. The inner ends of the pipe wall ribs are flush with the hole wall of the lower hole. A gap channel is formed between adjacent pipe wall ribs.

3. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab as described in claim 2, characterized in that: It also includes a movable washer ring, the upper end of which is located in the upper hole. The movable washer ring has multiple openings in the circumferential direction. The lower end of the movable washer ring abuts against the limiting platform. The upper end of the movable washer ring is connected to the lower end of the upper drain pipe. When the upper drain pipe is installed, the gap channel is connected to the interior of the pre-embedded pipe fitting through the opening.

4. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab as described in claim 3, characterized in that: Both ends of the movable washer are provided with openings.

5. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab as described in claim 1, characterized in that: The inner side of the pre-embedded pipe fitting is provided with a limiting groove to facilitate connection with the drain pipe, and the limiting groove is located below the lower hole.

6. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab according to claim 1, characterized in that: The pre-embedded pipe fitting is provided with a water-stop ring on the outside, and the water-stop ring has a retaining edge that protrudes upward.

7. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab according to claim 1, characterized in that: The base has multiple fixed legs extending radially, with the ends of the fixed legs extending out of the base and fixedly connected to the structural layer.

8. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab according to claim 1, characterized in that: It also includes plugs used to seal the ports on pre-embedded pipe fittings.

9. A multi-functional connector for pre-embedded water accumulation in the backfill area of ​​a drainage slab according to claim 1, characterized in that: The protective cover has a through hole to facilitate the passage of the drain pipe.

10. A method for constructing drainage in a backfill area of ​​a drainage slab, characterized in that, Including the multi-functional connector for pre-embedded water accumulation in the backfill area of ​​the drainage slab as described in claim 8. Includes the following steps: S1: Structural layer construction; S2: Install the pre-embedded pipe fittings in the structural layer; S3: Construction of the slope-finding layer; S4: Waterproof membrane construction: Tighten the waterproof membrane end to the waterproof membrane end groove, and then tighten the waterproof end pressure plate ring until the waterproof membrane is pressed tightly. S5: Install a plug at the port of the pre-embedded pipe fitting; S6: Water tightness test; S7: Install the upper drain pipe and protective cover, or install the protective cover and the lower drain pipe at the same time; S8: Construction of the filling layer in the backfill area of ​​the lowered slab; S9: Construction of concrete subbase layer; S10: Paving surface tiles.

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