CN216865374U - Drainage pipe system for preventing rainstorm from flowing backwards for basement - Google Patents

Abstract

The utility model provides a drainage pipe system that basement prevents rainstorm and flows backward, includes drain pump and check valve, the drain pump arrange in the sump pit, the delivery port of drain pump is linked together with the check valve import through pump back drain pipe, the check valve export is linked together with the gate valve import, the gate valve export is linked together with valve back drain pipe import, the indoor terrace of building bottom is passed in the drain pipe export behind the valve, stretches out the outer wall and is linked together with the siphon annihilator import of arranging the drainage pipe highest point in, siphon annihilator export is linked together with municipal drainage inspection shaft through drain pipe behind the ware. In addition, the utility model also provides an emergency drainage system suitable for the basement with dense population. The utility model has simple structure and scientific and reasonable design, and no matter any accident happens, including the check valve is blocked, the gate valve is normally opened, even the drain pipe is suddenly broken, outdoor accumulated water can not flow into the basement, thus effectively preventing rainstorm from flowing into the basement, and having huge social and economic benefits.

Description

Drainage pipe system for preventing rainstorm from flowing backwards for basement

Technical Field

The utility model relates to a flood-proof device for underground facilities of buildings in urban rainstorm, in particular to a drainage pipeline system for preventing rainstorm from flowing backwards in a basement.

Background

Underground buildings such as basement of current underground garage, underground warehouse, subway, current tunnel, underground market, underground power distribution station, air defense hole and civil buildings all have the hidden danger of being submerged by the torrential rain, and its reason has: 1. the basement inlet and outlet channel is not provided with water retaining equipment; 2. the height between the inlet and the outlet of the air-conditioning pipeline of the basement and the outdoor ground is not enough; 3. the joint of the cable trench and the basement is not sealed or lifted; 4. the water supply pipeline and the valve entering the basement are broken or the misoperation is not found in time; 5. and the rainwater of the drainage pipeline of the basement flows backwards and the like.

Aiming at the problem that rainwater of a basement drainage pipeline flows backwards, at present, a drainage system of a basement directly drains accumulated water into an outdoor sewer inspection well. The accumulated water in the water accumulation pit is pumped and pressurized by a drainage pump, and then enters the municipal drainage inspection well through a check valve, a gate valve and a drainage pipe. When the urban rainstorm occurs, if the check valve is blocked and fails, the gate valve is normally opened, and the drainage pump is not opened, the accumulated outdoor rainstorm water can flow back into the basement through the drainage pipe, the gate valve and the check valve, the basement is submerged, and the consequences are serious, so that the drainage system of the underground building is further improved and innovated.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, in order to overcome the defects of the prior art, the utility model aims to provide a drainage pipe system for preventing rainstorm backflow for a basement, which can effectively eliminate the potential safety hazard of the existing drainage system for underground buildings and solve the problem of rainwater backflow.

In order to achieve the purpose, the drainage pipeline system for preventing the basement from rainstorm backflow comprises a drainage pump and a check valve, wherein the drainage pump is arranged in a water collecting pit, a water outlet of the drainage pump is communicated with an inlet of the check valve through a rear drainage pipe of the pump, an outlet of the check valve is communicated with an inlet of a gate valve, an outlet of the gate valve is communicated with an inlet of a rear drainage pipe of the valve, an outlet of the rear drainage pipe of the valve penetrates through an indoor floor of a bottom layer of a building, extends out of an outer wall and is communicated with an inlet of a siphon eliminator arranged at the highest position of a drainage pipeline, and an outlet of the siphon eliminator is communicated with a municipal drainage inspection well through a rear drainage pipe of the siphon eliminator.

The drainage system in the above embodiment is suitable for the area with the air temperature higher than 0 ℃. If the above system is slightly modified, the new drainage system (i.e. another embodiment) can be applied to the area with the air temperature lower than 0 ℃, and the essential thing is that the pipes and equipments exposed in the atmosphere have no water and air inside in winter, so that the pipes and equipments cannot be frozen.

In addition, the utility model also provides an emergency drainage system suitable for the basement with dense population.

The utility model has simple structure and scientific and reasonable design, and no matter any accident happens, including the check valve is blocked, the gate valve is normally opened, even the drain pipe is suddenly broken, outdoor accumulated water can not flow into the basement, thus effectively preventing rainstorm from flowing into the basement, and having huge social and economic benefits.

Drawings

FIG. 1 is a schematic elevation view (cut away) of a drainage system of a current basement;

FIG. 2 is a schematic elevation view (cut away) of a drainage system in an area with an air temperature higher than 0 ℃ according to an embodiment of the present invention;

FIG. 3 is a schematic elevation view (cut away) of a drainage system in an area with an air temperature below 0 ℃ according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view (cut away) of the portion of the circuit of FIG. 3 of the present invention;

FIG. 5 is a schematic elevational view (cut away) of the siphon eliminator of the present invention;

FIG. 6 is a schematic elevation view (open) of an emergency drainage system additionally provided in a densely populated basement according to the present invention;

FIG. 7 is a schematic view of the bottom outer wall reinforcement of the building of the present invention in elevation (planed open);

in the utility model, each element on the graph adopts a hierarchical nomenclature, and the rule is as follows: elements of the drainage system are directly numbered; if some element has secondary element, then adding secondary sequence number after numbering; adding 0 before the number of the original building and structure; if the structure function of the elements in the original drainage system is not changed in the utility model, the serial number is also not changed; if changed, 00 is added before the number, and the reference numbers of the components are concretely as follows:

1-Water discharge Pump

2-pump rear drain pipe

3-check valve

4-gate valve

5-valve rear drain pipe 005-original drain system valve rear drain pipe

6-siphon eliminator 61-water inlet

62-vent hole

63-Top cover

64-outer cover

65-maximum allowable water level in the container

66-water flow channel in the device

67-Water outlet

68-bypass branch pipe

7-device rear drain pipe

8-winter gate valve 81-winter drain pipe

82-left tee joint

83-gate well

84-right tee joint

9-winter closing gate valve

10-emergency drainage axial-flow pump 101-vertical motor

11-emergency drain pipe 111-emergency drain outlet

01-indoor floor of building bottom layer

02-basement

03-basement indoor terrace

04-sump pit

05-basement exterior wall

06-building outer wall 061-reinforced concrete filling body for reinforcement

062-brick external mold vertical wall

063-brick outer mould flat bottom

07-rainstorm maximum water level

08-outdoor terrace

09-municipal drainage inspection shaft.

Detailed Description

The following detailed description of the embodiments of the utility model refers to the accompanying drawings and detailed description.

Fig. 1 is a schematic diagram of an original drainage system, and accumulated water in a sump 04 located below an indoor floor 03 of a basement is pressurized by a drainage pump 1, then flows through a check valve 3, a gate valve 4 and a drainage pipe 005 behind an original drainage system valve, and enters a municipal drainage inspection well 09.

In the original drainage system, if the check valve 3 is stuck or the indoor pipe is broken, outdoor heavy rain can easily flow into the basement 02 in a large amount. Even if rainstorm does not occur, if the municipal drainage pipeline is blocked, the water level of the municipal drainage inspection shaft 09 rises above the water outlet pipe opening of the post-valve drainage pipe 005 in the original drainage system, and the accident that sewage flows back into the basement 02 may also occur.

The pipes of the original drainage system are all under the indoor or outdoor terrace 08, the winter anti-freezing problem does not exist, the utility model takes the corresponding technical measures in figure 3 by paying attention to the advantage.

Fig. 2 shows a drainage pipeline system for preventing rainstorm backflow in a basement, which comprises a drainage pump 1 and a check valve 3, wherein the drainage pump 1 is arranged in a water collection pit 04, the water outlet of the drainage pump 1 is communicated with the inlet of the check valve 3 through a pump rear drainage pipe 2, the outlet of the check valve 3 is communicated with the inlet of a gate valve 4, the outlet of the gate valve 4 is communicated with the inlet of a valve rear drainage pipe 5, the outlet of the valve rear drainage pipe 5 penetrates through an indoor floor 01 at the bottom layer of a building, extends out of the outer wall 06 of the building and is communicated with the inlet of a siphon eliminator 6 arranged at the highest position of the drainage pipeline, the outlet of the siphon eliminator 6 is communicated with a municipal drainage inspection well 09 through a device rear drainage pipe 7, and the gate valve 4 is fully opened at ordinary times and is closed only when the drainage pump 1 is overhauled.

The core mechanism of the utility model is that the height of the bottom of the pipe at the highest position of the drain pipe 5 behind the valve is higher than the highest outdoor rainstorm water level 07, and the minimum safety margin is 0.5 m. However, this is only a necessary condition, not a sufficient condition.

The sufficient condition is constituted only if another necessary condition, that is, the siphon eliminator 6 is provided so that the siphon phenomenon cannot be generated in the entire drain pipe, is satisfied at the same time. It is impossible for outdoor rainstorm to flow backward into the basement 02 through the drain pipe.

The core technology of the siphon eliminator 6 is that the upper part of the siphon eliminator has enough air inlet holes to block the initial condition of siphon action.

The siphon breaker 6 is located at the highest level of the drain pipe at an elevation at least 0.5m above the storm maximum water level 07. When rainstorm occurs, the siphon eliminator 6 divides the water discharge pipe into a front section and a rear section which are mutually isolated, and outdoor water cannot flow backwards to enter the basement 02.

If the siphon eliminator 6 is not arranged, because the highest rainstorm water level 07 is higher than the water level of the water collecting pit 04, and the whole drainage pipeline is filled with water when the drainage pump 1 operates, when the drainage pump 1 stops operating, the check valve 3 is accidentally blocked at the moment, the gate valve 4 is normally opened, outdoor rainstorm can flow back into the basement 02 along the drainage pipeline, and the consequences are very serious. The entire drainpipe becomes a siphon at this time, and if the drainpipe in the chamber is broken again at this time, the basement 02 is submerged more quickly.

After having set up siphon annihilator 6, outdoor water can never get into basement 02, even check valve 3 is blocked, even indoor drainage pipe is unexpected to be broken, also only is located the limited deposit water among the drainage pipe in basement 02 at most and gets into basement 02, and its harm is extremely slight, can neglect.

In the drainage system shown in fig. 2, the highest level section of the valve rear drain pipe 5, the siphon breaker 6 and the vertical section of the machine rear drain pipe 7 are all in the outdoor atmosphere, and drainage is performed intermittently, so that freezing may occur in winter, equipment may be damaged, and use may be affected. Therefore, the system in the embodiment is only suitable for the areas with the air temperature higher than 0 ℃.

As shown in fig. 3, when the present invention is applied to the area with the air temperature lower than 0 ℃, the following technical measures are taken to prevent the outdoor pipelines and equipment from being frozen: namely, in the structural system shown in fig. 1, a winter-opening gate valve 8 and a winter drain pipe 81 are additionally arranged to communicate the horizontal pipe section of the post-valve drain pipe 5 with the horizontal pipe section of the post-device drain pipe 7; and a winter closing gate valve 9 is additionally arranged on the drain pipe 5 behind the valve. In winter, the winter-opening gate valve 8 is opened, the winter-closing gate valve 9 is closed, and drainage is enabled to bypass the second half section of the valve rear drainage pipe 5, the vertical pipe sections of the siphon eliminator 6 and the device rear drainage pipe 7, namely drainage of the drainage pump 1 and reach the municipal drainage inspection well 09 only through the pump rear drainage pipe 2, the check valve 3, the gate valve 4, the first half section of the valve rear drainage pipe 5, the winter drainage pipe 81, the winter-opening gate valve 8 and the horizontal pipe sections of the device rear drainage pipe 7. In the operation mode that the air temperature is lower than 0 ℃, the highest horizontal pipe section of the device rear drain pipe 7, the siphon eliminator 6 and the vertical pipe section of the device rear drain pipe 7 are still in the outdoor atmosphere, but no water or air exists in the devices, so that the devices cannot be frozen.

Rainstorm is not possible in winter, so that the rainstorm is not worried about pouring into the basement 02. If municipal drainage pipe blocks up, water level rose in the municipal drainage inspection shaft 09, and the drain pipe 2 in basement 02 broke this moment, and unexpected incident such as check valve 3 blocks has taken place, can close to open the gate valve 8 in winter and overhaul. When the device runs in spring, summer and autumn (the temperature is higher than 0 ℃), the winter gate closing valve 9 is opened, the winter gate opening valve 8 is closed, and the process is carried out according to the flow of the figure 1.

Fig. 4 is an enlarged view of the pipe in the vicinity of the winter-opening gate valve 8 in fig. 5. The winter closing gate valve 9 is arranged on the drain pipe 5 behind the valve, the drain pipe 5 behind the valve between the winter closing gate valve 9 and the gate valve 4 is communicated with the drain pipe 81 for winter through a left tee joint 82, the drain pipe 81 for winter penetrates through the outer wall 05 of the basement and is communicated with the horizontal pipe section of the drain pipe 7 behind the device, the drain pipe 81 for winter outside the outer wall 05 of the basement is provided with the gate valve 8 for winter, the drain pipe 8 for winter on the left side of the gate valve 8 for winter is communicated with the drain pipe 5 behind the valve through the left tee joint 82, and the right side of the gate valve 8 for winter is communicated with the horizontal pipe section of the drain pipe 7 behind the device through a right tee joint 84. The sluice gate 83 of the sluice valve 8 is opened in winter and is arranged outdoors and underground and tightly attached to the outer wall 05 of the basement.

The drain pipe system shown in FIG. 2 is simpler and shorter than the drain pipe system shown in FIG. 3.

As shown in fig. 5, the siphon eliminator 6 comprises a hollow shell 64, a bypass branch pipe 68 communicated with the side surface of the shell 64 is arranged, a water inlet 61 of the bypass branch pipe 68 is communicated with the valve rear drain pipe 5, and a water outlet 67 is arranged at the bottom of the shell 64 and is communicated with the device rear drain pipe 7; the top of the shell 64 is provided with a top cover 63, and the cylindrical wall of the shell 64 below the top cover is provided with a plurality of rows of vent holes 62 which are uniformly staggered; the lower edge of the orifice of the lowest vent hole 62 of the plurality of rows of vent holes 62 is higher than the pipe internal top elevation of the water inlet 61 by 100-150mm, the shell 64 of the siphon eliminator 6 is similar to a common downstream tee joint in a water supply pipeline, the actual structure and the function are completely different, the siphon eliminator 6 is made of cast iron or welded by steel pipes, and the inlet and outlet pipe orifice form can be a flange plate, a bell and spigot, or an inner pipe thread or an outer pipe thread. The drainage water of the basement 02 enters from the water inlet 61, passes through the water passing pipeline 66 in the basement and is discharged from the water outlet 67. The dimensions of each part of the siphon eliminator 6, including the thickness, are only related to the pipe diameter, so that the siphon eliminator 6 with various pipe diameters can be manufactured in batches by a factory for users to select, thereby greatly reducing the production cost. The upper portion of the housing 64 of the siphon eliminator 6, on the periphery of the cylinder below the cover top 63, has a plurality of drilled holes in a plurality of rows uniformly staggered, i.e., the vent holes 62. The outdoor atmosphere enters the shell 64 through the vent hole 62, the possibility of siphon action of a drainage pipeline is eliminated, the diameter of the vent hole 62 is phi 15, the total area of the vent holes 62 is equal to 5% -10% of the cross section area of the water inlet 61, and the full recent effect is achieved. The pipe bottom elevation of the water inlet 61 of the siphon eliminator 6 at the highest position of the drainage pipeline is flush with the pipe bottom elevation at the highest position of the valve rear drainage pipe 5; the water level is higher than the maximum outdoor rainstorm water level 07, and the minimum safety margin is 0.5 m; the height of the inner bottom of the highest position of the valve rear drain pipe 5 is higher than the maximum pipe resistance of the outdoor terrace 08 and the device rear drain pipe 7; to prevent the siphon eliminator 6 from overflowing outward. The maximum water level 65 in the siphon eliminator 6 is allowed to be 100-150mm below the lowest row of exhaust holes 62 and flush with the top of the water inlet 61 so as to ensure that the water in the siphon eliminator does not overflow from the vent holes 62 in normal operation and ensure the cleanness of the outdoor terrace 8.

To meet this requirement, the maximum water resistance in the post-house drain pipe 7 must not exceed the difference between the maximum allowable water level 65 in the house and the outdoor floor 08. For this purpose, the pipe diameter of the post-drainpipe 7 is selected appropriately according to its length, so that the flow rate in the pipe is not too high. This requirement is usually easy to implement. Examples are as follows; assuming that the elevation of the outdoor terrace 08 is 0, the ceiling height of the highest position of the post-valve drainage pipeline 5, that is, the ceiling height of the water inlet 61 of the siphon eliminator 6 is 1.5m, the total length of the post-siphon drainage pipeline 7 is 30m, the pipe diameter is 150, the flow rate of water in the pipeline is 0.85m/S, the hydraulic gradient i =9.59 ‰, the flow rate is 14.75L/S, (53.1 m/h or 1.275 m/d), the local resistance coefficient along the way is 30 × 0.00959=0.29m and is 3 (a 90 ° elbow and an outlet), and the local resistance is 0.85 ÷ (2 × 9.81) × 3=0.11m, and the total water resistance of the post-siphon drainage pipeline is 0.29+0.11=0.4 < 1.5 m. Therefore, in this example, during normal drainage, only 0.4m of the vertical section of the post-drainage pipe 7 is in a full-flow state, and the remaining 1.1m of the vertical pipe section is in a non-full-flow state (water flows down along the inner wall of the pipe and no water exists in the center of the pipe). From this example it follows that normally the requirements regarding the maximum allowable water level 65 in the siphon eliminator 6 must not exceed the ceiling level of the pipe at its inlet 61 are fully met. In the case of a heavy rain, the drain hole 62 is completely flooded, and it is not necessary to consider the sanitation and tidiness of the outdoor space.

Fig. 6 is suitable for emergency drainage of densely populated basements, including subways, traffic tunnels, underground malls, air raid shelters, and the like. The drainage of the basement in the embodiment of the figures 1 and 2 only refers to water seepage, car washing water, domestic excrement and sewage and a small amount of scientific research, commercial and industrial water of a civil structure, but the drainage of the basement with dense population additionally considers that a large amount of water flow accidentally filled from an inlet, an outlet and a ventilation opening of a large-caliber water pipe is required to be drained as soon as possible by a high-power axial flow pump to evacuate people and block the filling hole when a heavy-caliber water pipe bursts or a reservoir collapses and a river floods a dike. The cost of the emergency drainage equipment is extremely small compared with the social benefit. The fire fighting equipment is paid attention to the fire fighting equipment, and is not remarkable due to the extremely low use frequency of the fire fighting equipment.

The emergency drainage axial-flow pump 10 is connected with the vertical motor 101, a water inlet of the emergency drainage axial-flow pump 10 is positioned in the water collecting pit 04, a water outlet of the emergency drainage axial-flow pump 10 is communicated with an inlet of the emergency drainage pipe 11, and a water outlet of the emergency drainage pipe 11 penetrates through the outer wall 06 of the building to drain water to the outdoor terrace 08. The vertical motor 101 drives the emergency drainage axial-flow pump 10, the caliber of the pump can reach phi 800-phi 1000, water is pumped from the water collecting pit 04, the water is drained to the outdoor terrace 08 from the emergency drainage port 111 through the emergency drainage pipe 11, and the pipe bottom of the emergency drainage port 111 is at least 0.5m higher than the highest rainstorm water level 07. The system absolutely does not use a check valve 3, a gate valve 4 and a siphon eliminator 6. Diesel power plants should be purchased to ensure safety. The emergency drainage axial-flow pump 10 can be one or more, and the drainage capacity of the pump is to ensure that the accumulated water depth above the indoor floor 03 of the basement is not more than 0.4m within 1 hour under the condition of the maximum reverse irrigation amount, so that all people in the basement with dense population can be evacuated outdoors.

Fig. 7 shows a schematic view of the reinforcement of the outer wall 06 of the bottom layer of the building in a rainstorm area. When the drainage pipe system for preventing rainstorm from flowing backward according to the present invention is adopted, the rainstorm is blocked outside the basement 02 of the building, and the reinforcement problem of the outer wall 06 of the bottom floor of the building needs to be further considered. The basement outer wall 05 is designed according to the retaining wall and is of a reinforced concrete structure, and even if rainstorm occurs, additional reinforcement is not needed. The bottom outer wall 06 of the building is completely different, the high-rise building is of a frame structure, and the outer wall 06 of the high-rise building is a foam concrete masonry infilled wall. It can not bear load and can not retain water, so if the rainstorm highest water level 07 exceeds the indoor floor level 01 of the building bottom layer, the outer wall 06 can be reinforced according to the scheme shown in fig. 4. The thickness and reinforcing bar of reinforced concrete filler 061 between the vertical wall 062 and the outer wall 06 of building are determined by actual need, and its top surface is 30^oThe top surface of the vertical wall 062 of the brick-wall external mold is flush with the highest rainstorm water level 07, and the flat bottom 063 of the brick-wall external mold is about 0.4-0.5 m below the outdoor terrace 08.

If the maximum rainstorm water level 07 only exceeds the indoor floor of the bottom layer of the building by less than 0.3m, the outer wall of the bottom layer of the building is made of solid brick masonry, and the thickness of the outer wall exceeds 240mm, the outer wall does not need to be reinforced.

The basement drainage comprises leakage water of civil structures, car washing water, domestic excrement sewage, a small amount of scientific research, commercial and industrial drainage and the like.

The drainage system is scientific and reasonable in design, and the drainage pipe in the underground chamber is firstly raised to be above the highest rainstorm water level and then is downwards drained to the municipal drainage inspection well. The siphon eliminator is arranged at the highest position of the drain pipe, even if the drain pipe of the basement is accidentally broken or the check valve is blocked, the gate valve is normally opened, outdoor stormwater cannot flow into the basement along the drain pipe, and when the pump is stopped, air immediately enters the top of the drain pipe to block a water flow passage. The utility model has wide application range, is suitable for underground garages, underground warehouses, subways, traffic tunnels, underground shopping malls, air cavities and civil basements, has low engineering construction cost, is easy to popularize and apply, and has huge social and economic benefits.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims (6)

1. The utility model provides a drainage pipe system that basement prevented torrential rain and flowed backward, includes drain pump (1) and check valve (3), a serial communication port, drain pump (1) arrange in sump (04), the delivery port of drain pump (1) is linked together with check valve (3) import after the pump drain pipe (2), check valve (3) export is linked together with gate valve (4) import, gate valve (4) export is linked together with valve back drain pipe (5) import, valve back drain pipe (5) pass the indoor terrace of building bottom (01), stretch out building outer wall (06) and be linked together with siphon annihilator (6) import of arranging the drainage pipe highest point in, siphon annihilator (6) export is linked together through the import of ware back drain pipe (7) and municipal drainage pipe (09).

2. The drainage pipe system of the basement for preventing the rainstorm backflow according to claim 1, wherein the drain pipe (5) behind the valve is provided with a gate valve (9) closed in winter, the drain pipe (5) behind the gate valve (9) closed in winter is communicated with a drain pipe (81) used in winter through a left tee (82) on the drain pipe (5) behind the gate valve (4) closed in winter, the drain pipe (81) used in winter passes through the outer wall (05) of the basement to be communicated with the horizontal pipe section of the drain pipe (7) behind the basement, the drain pipe (81) used in winter outside the outer wall (05) of the basement is provided with a gate valve (8) opened in winter, when the temperature is lower than 0 ℃, the gate valve (8) opened in winter is opened, the gate valve (9) closed in winter, the drain pipe bypasses the latter half pipe section of the drain pipe (5) behind the valve, the siphon eliminator (6) and the vertical pipe section of the drain pipe (7) behind the basement, so that the pipes and the interior of the equipment in the outdoor atmosphere are free of water and air, the ice cannot be frozen; when the temperature is higher than 0 ℃, the winter closing gate valve (9) is opened, and the winter opening gate valve (8) is closed.

3. The drainage pipe system of the basement for preventing the reverse flow of the torrential rain, which is described in claim 1, wherein the pipe bottom elevation of the water inlet (61) of the siphon eliminator (6) at the highest position of the drainage pipe is flush with the pipe bottom elevation at the highest position of the valve rear drainage pipe (5), is higher than the highest outdoor torrential rain water level (07), and has a minimum safety margin of 0.5 m; the height of the inner bottom of the highest position of the valve rear drain pipe (5) is higher than the maximum pipe resistance of the outdoor terrace (08) and the device rear drain pipe (7); so as to prevent the siphon eliminator (6) from overflowing outwards.

4. The drainage pipe system of the basement for preventing the reverse flow of the torrential rain according to claim 1, wherein the siphon eliminator (6) comprises a hollow outer shell (64), a bypass branch pipe (68) communicated with the side surface of the outer shell (64) is arranged, a water inlet (61) of the bypass branch pipe (68) is communicated with the valve rear drainage pipe (5), and a water outlet (67) is arranged at the bottom of the outer shell (64) and is communicated with the valve rear drainage pipe (7); the top of the shell (64) is provided with a top cover (63), and the cylindrical wall of the shell (64) below the top cover is provided with a plurality of rows of vent holes (62) which are uniformly staggered; the total cross section sum of the vent holes (62) is equal to 5% -10% of the cross section area of the water inlet (61); the lower edge of the orifice of the lowest vent hole (62) of the plurality of rows of vent holes (62) is 100 mm and 150mm higher than the inner top of the pipe of the water inlet (61).

5. The drainage pipe system of the basement for preventing the rainstorm backflow according to claim 1, wherein the drainage pipe system of the basement for preventing the rainstorm backflow comprises an emergency drainage axial flow pump (10) and an emergency drainage pipe (11), the emergency drainage axial flow pump (10) is connected with a vertical motor (101), a water inlet of the emergency drainage axial flow pump (10) is located in a water collection pit (04), a water outlet of the emergency drainage axial flow pump (10) is communicated with an inlet of the emergency drainage pipe (11), a water outlet of the emergency drainage pipe (11) penetrates through an outer wall (06) of the building to drain water to an outdoor terrace (08), and the vertical motor (101) drives the emergency drainage axial flow pump (10) to pump water from the water collection pit (04) and drain water to the outdoor terrace (08) through the emergency drainage pipe (11) and the emergency drainage port (111).

6. The drainage pipe system of the basement for preventing the rainstorm backflow according to claim 5, wherein the height of the bottom of the emergency drainage port (111) is at least 0.5m higher than the highest rainstorm water level (07), and the emergency drainage axial flow pump (10) is provided with at least 1 pump, and the drainage capacity of the pump ensures that the depth of the accumulated water on the floor (03) in the basement chamber is not more than 0.4m within 1 hour under the maximum backflow flow rate.

Images