Negative pressure flow emergency drainage unit

Abstract

The application provides a negative pressure flow emergency drainage unit, and relates to the technical field of drainage units. The application provides a negative pressure flow emergency drainage unit, and relates to the technical field of drainage units. During emergency drainage, the vacuum pump body extracts negative pressure from the negative pressure extraction cylinder through the negative pressure extraction pipeline, and the accumulated water is filtered through the water inlet filter screen and then sucked into the negative pressure extraction cylinder through the water extraction pipeline. When the water level in the negative pressure extraction cylinder reaches the standard, the vacuum pump body can be started to fill the cylinder with gas, and the water flow is quickly squeezed into the water storage tank through the air pressure, further improving the drainage efficiency. The structure avoids the problem of multiple pipeline laying in traditional non-slope areas, and reduces material and construction costs.

Description

Technical Field

[0001] This utility model relates to the field of drainage unit technology, and in particular to a negative pressure flow emergency drainage unit. Background Technology

[0002] Negative pressure flow refers to a drainage method that uses artificially created local environments with pressure lower than atmospheric pressure to drive water flow rapidly. The core is to accelerate the discharge of accumulated water by using "negative pressure suction," rather than relying on the natural flow of traditional gravity drainage. Traditional gravity drainage relies on the water's own weight to flow downwards, while negative pressure flow actively draws water away using negative pressure suction. The former depends on the terrain slope, while the latter can overcome terrain limitations to achieve efficient drainage. Traditional gravity drainage relies on the terrain slope (e.g., water in a basement needs to be drained to the ground, requiring pipes to slope downwards). However, in emergency scenarios, many areas do not have natural slopes, or even have "reverse slopes" (e.g., water in a tunnel needs to be drained upwards, or underground parking garages are lower than the municipal pipe network). In industrial production, emergency drainage, and laboratory operations, negative pressure extraction technology is widely used in scenarios such as water removal, liquid extraction, and vacuum filtration because it can overcome gravity limitations and achieve efficient fluid transport. When existing emergency drainage units are in use, traditional drainage equipment mostly relies on gravity to drain water. In waterlogged areas without natural slope or with reverse slope (such as basements and low-lying flat sections of road), water may be difficult to drain. When water accumulates, workers need to use tools to scrape the water, resulting in a slow drainage rate and failing to meet the high-efficiency requirements of emergency drainage. Therefore, we propose a negative pressure flow emergency drainage unit. Utility Model Content

[0003] In view of this, this application provides a negative pressure flow emergency drainage unit, which solves the above technical problems to a certain extent.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A negative pressure flow emergency drainage unit includes a water storage tank, a negative pressure extraction cylinder fixedly installed on the top of the water storage tank, a connecting pipe fixedly installed on the bottom of the negative pressure extraction cylinder, and a water pumping pipe fixedly installed on the inner side of the negative pressure extraction cylinder. The water storage tank, the negative pressure extraction cylinder, the connecting pipe, and the water pumping pipe are equipped with a negative pressure emergency drainage storage component and a negative pressure emergency drainage filter component. The negative pressure emergency drainage storage assembly includes a vacuum pump body, a negative pressure extraction pipe, a first solenoid valve, a water-blocking protector, a diversion pipe, a second solenoid valve, and a check valve. The vacuum pump body is fixedly installed on the top of the water storage tank. One end of the negative pressure extraction pipe is fixedly installed on the input end of the vacuum pump body. The water-blocking protector is installed on the top of the connecting pipe via a flange and bolts. The other end of the negative pressure extraction pipe is fixedly installed on the top of the water-blocking protector. The first solenoid valve is fixedly installed on the outside of the negative pressure extraction pipe. One end of the diversion pipe is fixedly installed on the inside of the negative pressure extraction pipe. The other end of the diversion pipe is fixedly installed on the inside of the pumping pipe. The second solenoid valve and the check valve are respectively fixedly installed on the outside of the diversion pipe.

[0005] Preferably, the water storage tank is rotatably mounted on both the front and rear sides, and a drain pipe is fixedly mounted on the left side of the water storage tank, with a sealing cap threaded onto the outer side of the drain pipe.

[0006] Preferably, the negative pressure emergency drainage storage assembly further includes a water outlet pipe, a third solenoid valve, and a liquid level sensor. One end of the water outlet pipe is fixedly installed at the bottom of the negative pressure extraction cylinder, the third solenoid valve is fixedly installed on the outside of the water outlet pipe, the other end of the water outlet pipe is fixedly installed at the top of the water storage tank, and the liquid level sensor is fixedly installed on the inner wall of the negative pressure extraction cylinder.

[0007] Preferably, the negative pressure emergency drainage filtration assembly includes a tool storage rack, a control box, a filter frame, an inlet filter, a protective cover, and a control handle. The tool storage rack is fixedly installed on the right side of the water storage tank, the control box is fixedly installed on the outside of one end of the pumping pipe, the filter frame is fixedly installed on the right side of the control box, the inlet filter is installed on the right side of the filter frame by bolts, the protective cover is fixedly installed at the bottom of the control box, and the control handle is fixedly installed at the top of the protective cover.

[0008] Preferably, the negative pressure emergency drainage filter assembly further includes a pulley, a drive shaft, a baffle plate, a movable shaft, a bevel gear, and a cleaning brush. The pulley is rotatably mounted on the front and rear sides of the control box and the filter frame. The drive shaft is rotatably mounted on the inner side of the control box. The baffle plate is fixedly mounted on the outer side of the drive shaft. The movable shaft is rotatably mounted on the inner side of the protective cover. The bevel gear is fixedly mounted on the outer side of the movable shaft and the drive shaft, with adjacent bevel gears meshing. The cleaning brush is fixedly mounted on the outer side of the movable shaft and is in contact with the inlet filter screen.

[0009] Preferably, the tool storage rack has a placement slot at the top, and the control box and filter frame fit into the placement slot.

[0010] Preferably, the negative pressure extraction pipe and the diversion pipe are both made of rigid pipe material, and the water pumping pipe is made of flexible hose material.

[0011] Preferably, a fixing frame is fixedly installed on the left side of the water storage tank, and a push handle is fixedly installed on the inner side of the fixing frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a negative pressure emergency drainage unit. Through a specially designed negative pressure emergency drainage storage component, the unit utilizes a dual structure of negative pressure extraction and pneumatic assistance to achieve efficient drainage without relying on ground slope. During emergency drainage, the vacuum pump body draws negative pressure into the negative pressure extraction cylinder through the negative pressure extraction pipe. Accumulated water, after being filtered by the inlet filter, is drawn into the negative pressure extraction cylinder through the pumping pipe. When the water level in the negative pressure extraction cylinder reaches the target level, the vacuum pump body is activated to fill the cylinder with gas. The gas pressure then rapidly forces the water flow into the storage tank for storage, further improving drainage efficiency. This structure avoids the problem of needing to lay multiple pipes in traditional flat areas, reducing material and construction costs. This utility model discloses a negative pressure emergency drainage unit. Through its negative pressure emergency drainage filter assembly, the unit effectively solves the problem of filter and pipe blockage via a dual anti-clogging structure of real-time cleaning and high-pressure backflushing. During water extraction, the water flow impacts the baffle plate inside the control box, driving the drive shaft to rotate. The drive shaft, through bevel gear transmission, drives the movable shaft and cleaning brush to rotate. The cleaning brush adheres to the inlet filter screen for cleaning, preventing impurities from adhering and clogging it. When a minor blockage occurs in the drainage pipe, the second solenoid valve on the diversion pipe is opened, allowing high-pressure gas to enter the drainage pipe through the diversion pipe and forcefully flush out the blockage. This dual anti-clogging design eliminates the need for frequent manual cleaning, ensuring a continuous and stable drainage process.

[0013] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a negative pressure flow emergency drainage unit proposed in this utility model; Figure 2 A schematic diagram of a three-dimensional view of a partial structure of a negative pressure flow emergency drainage unit according to an embodiment of this application is shown; Figure 3 A schematic diagram showing a three-dimensional view of a portion of the structure of a negative pressure emergency drainage filter assembly provided according to an embodiment of this application is shown. Figure 4 This is a schematic diagram showing a three-dimensional cross-sectional view of a negative pressure flow emergency drainage unit according to an embodiment of this application.

[0015] Figure label: 1. Negative pressure emergency drainage storage assembly; 2. Negative pressure emergency drainage filtration assembly; 3. Water tank; 4. Moving rollers; 5. Drainage pipe; 6. Sealing cover; 7. Negative pressure extraction cylinder; 8. Connecting pipe; 9. Pumping pipe; 11. Vacuum pump body; 12. Negative pressure extraction pipe; 13. First solenoid valve; 14. Water blocking protector; 15. Diversion pipe; 16. Second solenoid valve; 17. Check valve; 18. Outlet pipe; 19. Third solenoid valve; 20. Liquid level sensor; 21. Tool storage rack; 22. Control box; 23. Filter frame; 24. Inlet filter screen; 25. Protective cover; 26. Control handle; 27. Pulley; 28. Drive shaft; 29. ​​Baffle; 30. Movable shaft; 31. Bevel gear; 32. Cleaning brush. Detailed Implementation

[0016] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings; The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] refer to Figure 1-4 A negative pressure flow emergency drainage unit includes a water storage tank 3, a negative pressure extraction cylinder 7 fixedly installed on the top of the water storage tank 3, a connecting pipe 8 fixedly installed on the bottom of the negative pressure extraction cylinder 7, and a pumping pipe 9 fixedly installed on the inner side of the negative pressure extraction cylinder 7. A negative pressure emergency drainage storage component 1 and a negative pressure emergency drainage filter component 2 are provided on the water storage tank 3, the negative pressure extraction cylinder 7, the connecting pipe 8 and the pumping pipe 9. The negative pressure emergency drainage storage assembly 1 includes a vacuum pump body 11, a negative pressure extraction pipe 12, a first solenoid valve 13, a water-blocking protector 14, a diversion pipe 15, a second solenoid valve 16, and a check valve 17. The vacuum pump body 11 is fixedly installed on the top of the water storage tank 3. One end of the negative pressure extraction pipe 12 is fixedly installed on the input end of the vacuum pump body 11. The water-blocking protector 14 is installed on the top of the connecting pipe 8 via a flange and bolts. The other end of the negative pressure extraction pipe 12 is fixedly installed on the top of the water-blocking protector 14. The first solenoid valve 13 is fixedly installed on the top of the water-blocking protector 14. The diversion pipe 15 is installed on the outside of the negative pressure extraction pipe 12. One end of the diversion pipe 15 is fixedly installed on the inside of the negative pressure extraction pipe 12, and the other end of the diversion pipe 15 is fixedly installed on the inside of the water pumping pipe 9. The second solenoid valve 16 and the one-way valve 17 are respectively fixedly installed on the outside of the diversion pipe 15. The water blocking protector 14 is equipped with a filter element made of hydrophobic material, such as a PTFE polytetrafluoroethylene filter element. Air can pass through, but liquid cannot pass through, which can completely block backflow of liquid. This is existing technology, so it is not described in detail in this article.

[0018] In this embodiment, movable rollers 4 are rotatably installed on the front and rear sides of the water storage tank 3, and a drain pipe 5 is fixedly installed on the left side of the water storage tank 3. A sealing cap 6 is threaded on the outside of the drain pipe 5. When the liquid level inside the negative pressure extraction cylinder 7 is high, the vacuum pump body 11 can be controlled to start and extract the gas in the air. The air can be discharged into the negative pressure extraction cylinder 7 through the negative pressure extraction pipe 12. The air pressure can quickly squeeze the water into the interior of the water storage tank 3 and open the second solenoid valve 16 on the diversion pipe 15 to allow high pressure air to enter the interior of the water pumping pipe 9. This can flush out the fine substances in the water pumping pipe 9 and the inlet filter screen 24 under high pressure to prevent blockage.

[0019] In this embodiment, the negative pressure emergency drainage storage assembly 1 also includes a water outlet pipe 18, a third solenoid valve 19, and a liquid level sensor 20. One end of the water outlet pipe 18 is fixedly installed at the bottom of the negative pressure extraction cylinder 7, the third solenoid valve 19 is fixedly installed on the outside of the water outlet pipe 18, and the other end of the water outlet pipe 18 is fixedly installed at the top of the water storage tank 3. The liquid level sensor 20 is fixedly installed on the inner wall of the negative pressure extraction cylinder 7. When emergency drainage is required, the device is moved to a different position using the moving rollers 4, and the control box 22 and the filter frame 2 are also moved. 3. Take it out from the tool storage rack 21, move the control box 22 by controlling the handle 26, turn on the vacuum pump body 11 and draw negative pressure into the negative pressure extraction cylinder 7 through the negative pressure extraction pipe 12, so that the water on the ground can be filtered through the water inlet filter screen 24 and enter the interior of the negative pressure extraction cylinder 7 through the water extraction pipe 9. When the water level is aligned with the liquid level sensor 20, the vacuum pump body 11 can be turned off and the third solenoid valve 19 on the water outlet pipe 18 can be opened, and the water can enter the interior of the water storage tank 3 for temporary storage.

[0020] In this embodiment, the negative pressure emergency drainage filter assembly 2 includes a tool storage rack 21, a control box 22, a filter frame 23, an inlet filter screen 24, a protective cover 25, and a control handle 26. The tool storage rack 21 is fixedly installed on the right side of the water storage tank 3, the control box 22 is fixedly installed on the outside of one end of the water pumping pipe 9, the filter frame 23 is fixedly installed on the right side of the control box 22, the inlet filter screen 24 is installed on the right side of the filter frame 23 by bolts, the protective cover 25 is fixedly installed on the bottom of the control box 22, and the control handle 26 is fixedly installed on the top of the protective cover 25.

[0021] In this embodiment, the negative pressure emergency drainage filter assembly 2 further includes a pulley 27, a drive shaft 28, a baffle 29, a movable shaft 30, a bevel gear 31, and a cleaning brush 32. The pulley 27 is rotatably mounted on the front and rear sides of the control box 22 and the filter frame 23. The drive shaft 28 is rotatably mounted on the inner side of the control box 22. The baffle 29 is fixedly mounted on the outer side of the drive shaft 28. The movable shaft 30 is rotatably mounted on the inner side of the protective cover 25. The bevel gear 31 is fixedly mounted on the movable shaft 30 and the drive shaft 28. On the outside of 8, two adjacent bevel gears 31 mesh with each other. The cleaning brush 32 is fixedly installed on the outside of the movable shaft 30. The cleaning brush 32 is in contact with the inlet filter screen 24. During the water extraction process, it can contact the baffle 29 and drive the baffle 29 and the drive shaft 28 to rotate. After the drive shaft 28 rotates, it can drive the movable shaft 30 and the cleaning brush 32 to rotate through the bevel gears 31. After the cleaning brush 32 rotates, it can clean the inlet filter screen 24 to prevent the inlet filter screen 24 from becoming clogged.

[0022] In this embodiment, the top of the tool storage rack 21 is provided with a placement slot, and the control box 22 and the filter frame 23 are attached to the placement slot.

[0023] In this embodiment, both the negative pressure extraction pipe 12 and the diversion pipe 15 are made of rigid pipe, while the water pumping pipe 9 is made of flexible hose. The flexible hose is made of PVC, and the rigid pipe is made of stainless steel. The rigid pipe material prevents the negative pressure extraction pipe 12 and the diversion pipe 15 from deforming during use. The flexible hose material of the water pumping pipe 9 allows the operator to move the control box 22 and the filter frame 23 by controlling the handle 26, making it easier for the device to pump water from different terrains.

[0024] In this embodiment, a fixed frame is fixedly installed on the left side of the water storage tank 3, and a push handle is fixedly installed on the inner side of the fixed frame; the push handle makes it easy for the staff to control and move the device, and with the moving rollers 4 below, the device can be used in emergencies at different water accumulation locations.

[0025] Specifically, the unit can be flexibly deployed through multiple moving structures. The moving rollers 4 on the front and rear sides of the water tank 3, together with the push handle on the left fixed frame, can push the unit to move quickly to the water accumulation site. The water pumping pipe 9 is made of flexible hose. The staff can adjust the water pumping position by controlling the control box 22 and the filter frame 23 through the control handle 26 to adapt to the water pumping needs of different terrains. When not in use, the control box 22 and the filter frame 23 can be stored in the placement slot of the tool storage rack 21 to reduce storage space and avoid equipment idle waste. The unit achieves efficient drainage without relying on ground slope through a dual structure of negative pressure extraction and air pressure assistance. In emergency drainage, the vacuum pump body 11 draws negative pressure into the negative pressure extraction cylinder 7 through the negative pressure extraction pipe 12. The accumulated water is filtered by the inlet filter screen 24 and then sucked into the negative pressure extraction cylinder 7 through the pumping pipe 9. When the water level in the negative pressure extraction cylinder 7 reaches the standard, the vacuum pump body 11 can be activated to fill the negative pressure extraction cylinder 7 with gas. The air pressure quickly forces the water flow into the water storage tank 3 for storage, further improving drainage efficiency. In addition, the high-pressure gas enters the pumping pipe 9 through the diversion pipe 15, which flushes out the blockages in the pumping pipe 9 and the inlet filter screen 24. This structure avoids the problem of laying multiple pipes in traditional areas without slope, reducing material and construction costs. The unit effectively solves the problem of filter and pipe blockage through a dual anti-clogging structure of real-time cleaning and high-pressure backflushing. When pumping water, the water flow impacts the baffle 29 in the control box 22, driving the drive shaft 28 to rotate. The drive shaft 28 drives the movable shaft 30 and the cleaning brush 32 to rotate through the bevel gear 31. The cleaning brush 32 cleans the inlet filter 24 by adhering to it, preventing impurities from adhering and clogging the inlet filter 24. When a small blockage occurs in the pumping pipe 9, the second solenoid valve 16 on the diversion pipe 15 is opened. High-pressure gas enters the pumping pipe 9 through the diversion pipe 15 and flushes out the blockage under high pressure. The dual anti-clogging design eliminates the need for frequent manual cleaning, ensuring a continuous and stable drainage process. The unit ensures stable operation of the negative pressure system through water-blocking protection and liquid level control. The water-blocking protector 14 between the negative pressure extraction pipe 12 and the connecting pipe 8 has a built-in PTFE hydrophobic filter element, which only allows air to pass through and can completely prevent water from being sucked back into the vacuum pump body 11, thus avoiding equipment damage. The liquid level sensor 20 inside the negative pressure extraction cylinder 7 monitors the water level in real time. When the water level reaches the target, it automatically controls the vacuum pump body 11 to close and opens the third solenoid valve 19 to allow water to flow through the outlet pipe 18 into the water storage tank 3, preventing water overflow. At the same time, the negative pressure extraction pipe 12 and the diversion pipe 15 are made of stainless steel rigid pipe material to avoid pipe deformation under negative or high pressure, ensuring system stability. The unit integrates functions such as extraction, filtration, storage, and collection, and the operation process is simple and efficient. The water storage tank 3 can temporarily store water, avoiding frequent changes in the drainage location. After drainage is completed, the stored water can be discharged by opening the sealing cover 6 on the outside of the drainage pipe 5. The protective cover 25 at the bottom of the control box 22 can protect the internal transmission structure from impurities and extend the equipment life. The pulleys 27 on the front and rear sides of the control box 22 make it easy to adjust and move the water pumping position, further improving the ease of operation.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure flow emergency drainage unit, characterized in that, include: A water storage tank (3) is provided with a negative pressure extraction cylinder (7) fixedly installed on the top of the water storage tank (3), a connecting pipe (8) fixedly installed on the bottom of the negative pressure extraction cylinder (7), and a water pumping pipe (9) fixedly installed on the inner side of the negative pressure extraction cylinder (7). A negative pressure emergency drainage storage component (1) and a negative pressure emergency drainage filter component (2) are provided on the water storage tank (3), the negative pressure extraction cylinder (7), the connecting pipe (8) and the water pumping pipe (9). The negative pressure emergency drainage storage assembly (1) includes a vacuum pump body (11), a negative pressure extraction pipe (12), a first solenoid valve (13), a water-blocking protector (14), a diversion pipe (15), a second solenoid valve (16), and a check valve (17). The vacuum pump body (11) is fixedly installed on the top of the water storage tank (3). One end of the negative pressure extraction pipe (12) is fixedly installed at the input end of the vacuum pump body (11). The water-blocking protector (14) is installed on the connecting pipe by a flange and bolts. (8) The other end of the negative pressure extraction pipe (12) is fixedly installed on the top of the water blocking protector (14). The first solenoid valve (13) is fixedly installed on the outside of the negative pressure extraction pipe (12). One end of the diversion pipe (15) is fixedly installed on the inside of the negative pressure extraction pipe (12). The other end of the diversion pipe (15) is fixedly installed on the inside of the water pumping pipe (9). The second solenoid valve (16) and the one-way valve (17) are respectively fixedly installed on the outside of the diversion pipe (15).

2. The emergency negative pressure flow drainage unit according to claim 1, characterized in that, The water storage tank (3) is rotatably mounted with movable rollers (4) on both the front and rear sides, and a drain pipe (5) is fixedly mounted on the left side of the water storage tank (3). A sealing cap (6) is threaded onto the outside of the drain pipe (5).

3. The emergency negative pressure flow drainage unit according to claim 1, characterized in that, The negative pressure emergency drainage storage assembly (1) also includes a water outlet pipe (18), a third solenoid valve (19) and a liquid level sensor (20). One end of the water outlet pipe (18) is fixedly installed at the bottom of the negative pressure extraction cylinder (7), the third solenoid valve (19) is fixedly installed on the outside of the water outlet pipe (18), the other end of the water outlet pipe (18) is fixedly installed on the top of the water storage tank (3), and the liquid level sensor (20) is fixedly installed on the inner wall of the negative pressure extraction cylinder (7).

4. The emergency negative pressure flow drainage unit of claim 1, wherein, The negative pressure emergency drainage filter assembly (2) includes a tool storage rack (21), a control box (22), a filter frame (23), an inlet filter (24), a protective cover (25), and a control handle (26). The tool storage rack (21) is fixedly installed on the right side of the water storage tank (3). The control box (22) is fixedly installed on the outside of one end of the water pumping pipe (9). The filter frame (23) is fixedly installed on the right side of the control box (22). The inlet filter (24) is installed on the right side of the filter frame (23) by bolts. The protective cover (25) is fixedly installed at the bottom of the control box (22). The control handle (26) is fixedly installed at the top of the protective cover (25).

5. The emergency negative pressure flow drainage unit according to claim 4, characterized in that, The negative pressure emergency drainage filter assembly (2) also includes a pulley (27), a drive shaft (28), a baffle (29), a movable shaft (30), a bevel gear (31), and a cleaning brush (32). The pulley (27) is rotatably installed on the front and rear sides of the control box (22) and the filter frame (23). The drive shaft (28) is rotatably installed on the inner side of the control box (22). The baffle (29) is fixedly installed around the outer side of the drive shaft (28). The movable shaft (30) is rotatably installed on the inner side of the protective cover (25). The bevel gear (31) is fixedly installed on the outer side of the movable shaft (30) and the drive shaft (28). Two adjacent bevel gears (31) mesh with each other. The cleaning brush (32) is fixedly installed on the outer side of the movable shaft (30). The cleaning brush (32) is in contact with the inlet filter screen (24).

6. The emergency negative pressure flow drainage unit of claim 4, wherein, The tool storage rack (21) has a placement slot on its top, and the control box (22) and filter frame (23) fit into the placement slot.

7. The negative pressure flow emergency drainage unit according to claim 1, characterized in that, The negative pressure extraction pipe (12) and the diversion pipe (15) are both made of rigid pipe material, while the water pumping pipe (9) is made of flexible hose material.

8. The emergency negative pressure flow drainage unit of claim 1, wherein, A fixed frame is fixedly installed on the left side of the water storage tank (3), and a push handle is fixedly installed on the inner side of the fixed frame.

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