Slow-lying underground pipe drainage and vertical shaft negative pressure flow increasing device
By combining underground pipes in depressions with negative pressure boosting devices in vertical shafts, and employing conical reverse filter layers and negative pressure suction technology, the problem of low drainage efficiency in depressions has been solved, achieving rapid and efficient drainage of accumulated water in depressions and reducing energy consumption.
Patent Information
- Application Number
- CN202520266876.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-19
AI Technical Summary
The drainage system for depressions suffers from problems such as low drainage efficiency, high energy consumption, and limited radius of influence of single well drainage, making it difficult to effectively solve the waterlogging and salinization disasters caused by water accumulation in depressions.
Combining the underground pipe drainage system with the vertical shaft negative pressure boosting device, the reverse filter layer is designed with a conical structure, the water intake pipe is equipped with a conical water inlet hole, and an automatic air pump and water pump are installed in the vertical shaft to form a negative pressure environment, thereby enhancing the water inflow rate and drainage flow rate.
It enables rapid drainage of water accumulated in depressions, improves drainage efficiency, reduces energy consumption, reduces land occupation requirements, and solves the shortcomings of traditional drainage technologies.
Smart Images
Figure CN223660983U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of farmland water conservancy equipment, and relates to a drainage device for underground pipes in depressions and a negative pressure flow boosting device for vertical shafts. Background Technology
[0002] Due to natural factors such as topography, irrigation areas often contain low-lying, depressions. During periods of heavy rainfall or frequent irrigation, drainage in these depressions becomes a significant constraint on agricultural production. This is especially true in arid and semi-arid irrigation areas with insufficient drainage, where waterlogging or shallow groundwater levels in these depressions can easily lead to waterlogging and salinization disasters. Therefore, effectively draining low-lying farmland is a crucial measure to ensure sustainable agricultural development.
[0003] Currently, people commonly use open channels, culverts, and shafts to prevent and control waterlogging and salinization disasters in farmland. However, due to the low-lying terrain of depressions, open channels and culverts suffer from problems such as lack of gravity flow, slow flow velocity, and low drainage efficiency. Shaft drainage has drawbacks such as high energy consumption and limited radius of influence for a single well. Therefore, there is an urgent need to invent a depression drainage technology and device that combines the functions of improving saline-alkali land in arid areas, increasing drainage efficiency, reducing energy consumption, and minimizing land occupation, in order to address the low efficiency of traditional drainage technologies in depressions. Utility Model Content
[0004] The purpose of this invention is to provide a drainage device for underground pipes in low-lying areas and a negative pressure boosting device for vertical shafts, which can promptly drain water accumulated in low-lying farmland areas.
[0005] The technical solution adopted in this utility model is:
[0006] The underground drainage system for depressions and the negative pressure boosting device for vertical shafts include a filter layer installed in the depression, which is connected to a water suction pipe via a connecting pipe. The other end of the water suction pipe is connected to a water collection pipe, and the end of the water collection pipe is connected to a vertical shaft. An automatic air pump is installed at the top of the vertical shaft, and a water pump is installed at the bottom.
[0007] The features of this utility model also include:
[0008] The upper end of the filter layer is connected to the surface of the depression. It is a conical tubular structure that is wider at the top and narrower at the bottom. Different filter media with gradually increasing particle size from top to bottom are placed inside, and the filter media are wrapped with geotextile.
[0009] Both the water intake pipe and the water collection pipe have a certain slope. Both are polyethylene double-wall corrugated pipes with an anti-stick coating on the inner wall.
[0010] Multiple water inlets are provided at the top and sides of the corrugated recess on the outer wall of the water intake pipe. The water inlets are cone-shaped funnels with a structure that is wider at the top and narrower at the bottom.
[0011] A permeable filter layer and a filter screen are arranged sequentially from the outside to the inside at the water inlet. The permeable filter layer includes a crushed stone layer and a gravel layer arranged sequentially from the outside to the inside. The crushed stone layer is composed of small-sized crushed stone with a thickness of 5cm, and the gravel layer is composed of larger-sized gravel with a thickness of 3cm. Both the crushed stone layer and the gravel layer are wrapped with geotextile. The filter screen is 1cm thick.
[0012] The automatic air pump is connected to a conical air extraction pipe, the smaller diameter end of which is connected to the automatic air pump. The air extraction pipe is higher than the liquid level in the well. The automatic air pump is also connected to an exhaust pipe, which leads to the outside of the well.
[0013] An isolation mesh cover is installed at the end of the exhaust pipe, and a pressure monitor is also installed on the exhaust pipe.
[0014] A Venturi jet and a pumping pipe are connected sequentially at the outlet of the water pump, with the pumping pipe leading to the outside of the well.
[0015] A water level monitor is installed below the interface between the water collection pipe and the vertical shaft.
[0016] A sealing cover is installed at the top of the shaft.
[0017] The beneficial effects of this utility model are:
[0018] This utility model device combines an underground pipe drainage system with a vertical shaft. An air pump is installed inside the shaft, the filter layer is designed in a cone shape, and a cone-shaped water inlet is provided on the water suction pipe. On the one hand, when the air pump is running, it can carry out the air in the entire device, increasing the negative pressure environment inside the device, which is conducive to the infiltration of water around the depression and on the surface of the depression. On the other hand, the cone-shaped water inlet of the water suction pipe can enhance the water inflow rate. Combined with the overall negative pressure of the pipe system, the water at the water inlet can enter the pipe more quickly under the action of pressure, further increasing the drainage flow and realizing efficient drainage of the underground pipe. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the device of this utility model;
[0020] Figure 2 This is a schematic diagram of the vertical seepage pipe in the device of this utility model;
[0021] Figure 3 This is a schematic diagram of the water suction pipe in the device of this utility model;
[0022] Figure 4 yes Figure 3 The detailed view is a schematic diagram of the water inlet hole in the water suction pipe of the device of this utility model.
[0023] In the diagram, 1. Vertical seepage pipe, 2. Filter layer, 3. Connecting pipe, 4. Geotextile, 5. Suction pipe, 6. Inlet hole, 7. Permeable filter layer, 8. Crushed stone layer, 9. Gravel layer, 10. Filter screen, 11. Water collection pipe, 12. Shaft, 13. Automatic air pump, 14. Air extraction pipe, 15. Exhaust pipe, 16. Pressure monitor, 17. Water level monitor, 18. Water pump, 19. Venturi jet, 20. Water pumping pipe, 21. Sealing cover, 22. Isolation netting. Detailed Implementation
[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0025] Example 1
[0026] This utility model relates to a drainage device for concealed pipes in depressions and a negative pressure boosting device for vertical shafts, such as... Figure 1 As shown, it includes three parts: a vertical seepage pipe 1, an underground drainage system, and a shaft system. The vertical seepage pipe 1 is used to collect water accumulated in the depression. The water flows through the vertical seepage pipe 1 into the underground drainage system, and then into the shaft system. After being temporarily stored in the shaft system, it is discharged, thus realizing the drainage of water accumulated in the depression.
[0027] like Figure 2 As shown, the upper end of the vertical seepage pipe 1 connects to a low-lying area on the ground surface. It includes a filter layer 2 and a connecting pipe 3. The upper end of the filter layer 2 is connected to the surface of the depression. It is a conical tubular structure that is wider at the top and narrower at the bottom. Inside, there are filter media with different particle sizes that gradually increase from top to bottom. The uppermost layer uses fine granular material to intercept fine suspended particles in the water flow; the middle layer uses medium-sized material to further filter the water flow and withstand the pressure from the upper layer; the bottommost layer uses relatively large-sized material to act as a support layer and ensure that the water flows smoothly into the connecting pipe. The filter media in the filter layer 2 is wrapped with geotextile 4 to prevent the filter media from being lost over a long period of time.
[0028] The filter layer 2 adopts a structure that is wider at the top and narrower at the bottom. The wider top layer increases the contact area between the water in the depression and the filter media, improving filtration efficiency, while the narrower bottom layer acts as a guide, allowing the water to quickly enter. In addition, the structure saves on the amount of filter media used, disperses the weight of the filter media, makes the filter media structure more stable, and reduces the stress on the pipeline.
[0029] The connecting pipe 3 is connected to the lower end of the filter layer 2, and it is a pipe made of high-density polyethylene.
[0030] The vertical seepage pipe 1 can be one or more, and its connecting pipe 3 is connected to an underground drainage system. The underground drainage system includes a water intake pipe 5 connected to the connecting pipe 3. One water intake pipe 5 can be connected to one or more connecting pipes 3. Multiple water intake pipes 5 are then connected to a collection pipe 11, and the other end of the collection pipe 11 is connected to a shaft system. Accumulated water flows from the vertical seepage pipe 1 into the water intake pipe 5, then collects in the collection pipe 11, and finally flows into the shaft system.
[0031] Both the suction pipe 5 and the collection pipe 11 are made of polyethylene double-wall corrugated pipe. The inner wall of the pipe is smooth and coated with an anti-stick coating to reduce water flow resistance and ensure smooth water flow. Both the suction pipe 5 and the collection pipe 11 are laid with a certain slope to facilitate drainage.
[0032] like Figure 2 and Figure 3 As shown, multiple water inlets 6 are provided on the top and sides of the corrugated recess on the outer wall of the water inlet pipe 5. Their function is to allow excess water in the soil that has not been drained away by the vertical seepage pipe 1 to enter the water inlet pipe 5. The double-layer water inlet increases the water flow rate.
[0033] like Figure 3 and Figure 4 As shown, the water inlet 6 is a conical funnel shape with a structure that is wider at the top and narrower at the bottom. On the one hand, the water flow is affected by the narrowing of the lower orifice. According to Bernoulli's principle, the flow velocity will increase slightly and the pressure at the inlet will increase, which is conducive to the formation of siphon phenomenon and increases the water flow rate. On the other hand, it allows the water to enter the pipe more smoothly and reduces the probability of vortex formation at the orifice.
[0034] A permeable filter layer 7 and a filter screen 10 are arranged sequentially from the outside to the inside at the inlet of the water inlet 6. The permeable filter layer 7 includes a crushed stone layer 8 and a gravel layer 9 arranged sequentially from the outside to the inside. Both the crushed stone layer 8 and the gravel layer 9 are wrapped with geotextile 4. The crushed stone layer 8 is composed of small-sized crushed stone and is 5cm thick, while the gravel layer 9 is composed of larger-sized gravel and is 3cm thick. It can filter and intercept soil particles that migrate with water, slow down the clogging process of the water inlet 6, and also has a certain reinforcing effect on the water inlet 6. The filter screen 10 is made of stainless steel and is 1cm thick. Its mesh size is smaller than that of the gravel in the gravel layer 9. It is corrosion-resistant and serves to support the crushed stone layer 8 and the gravel layer 9, while further intercepting impurity particles.
[0035] like Figure 1As shown, the vertical shaft system includes a vertical shaft 12 connected to the water collection pipe 11. The vertical shaft 12 receives and stores the water discharged from the underground drainage pipe of the farmland. An automatic air pump 13 is installed at the top inside the shaft to draw air from the entire device and discharge it in time, so that the entire device is kept under negative pressure. This allows the water around the depression and the surface water to quickly enter the vertical seepage pipe 1, while increasing the flow rate at the orifice of the water suction pipe 5 and the flow velocity inside the entire pipe.
[0036] The automatic air pump 13 is connected to a conical air pumping pipe 14, with its small-diameter end connected to the automatic air pump 13. The air pumping pipe 14 is higher than the liquid level in the well. Its conical structure design can increase the air pumping area, ensure that the air in the well can be discharged in time, and improve the working efficiency of the automatic air pump 13.
[0037] The automatic air pump 13 is also connected to an exhaust pipe 15, which leads to the outside of the well. The air drawn by the automatic air pump 13 is discharged through the exhaust pipe 15. An isolation mesh cover 22 is installed at the end of the exhaust pipe 15 to prevent foreign objects and impurities from entering the device. A pressure monitor 16 is also installed on the exhaust pipe 15 to monitor the pressure inside the well and transmit the data to the automatic air pump 13. The automatic air pump 13 is started when the pressure difference between the inside and outside of the device is insufficient; otherwise, it is shut down.
[0038] A water pump 18 is installed at the bottom of the shaft 12. A Venturi jet injector 19 and a pumping pipe 20 are connected sequentially to the outlet of the water pump 18, with the pumping pipe 20 leading to the outside of the shaft. The water pump 18 is used to pump out the drainage stored in the shaft, removing air to create a negative pressure environment, accelerating the water flow rate. Furthermore, the pumped water's velocity increases as it passes through the contraction section of the Venturi jet injector 19, further intensifying the negative pressure and improving drainage efficiency, quickly discharging the accumulated water in the shaft 12. The water pump 18 is a submersible pump, capable of operating directly underwater, unaffected by negative pressure, and offering convenient installation, stable performance, and low maintenance costs.
[0039] A water level monitor 17 is installed below the interface between the water collection pipe 11 and the vertical shaft 12 to monitor the water level in the well and transmit the data to the water pump 18 to control the start and stop of the water pump 18.
[0040] The top of the shaft 12 is equipped with a sealing cover 21, which not only ensures a stable negative pressure state inside the shaft, but also prevents external impurities from entering.
[0041] Example 2
[0042] The underground drainage and vertical shaft negative pressure boosting device in this embodiment includes a filter layer 2 installed in the depression. The filter layer 2 is connected to a water suction pipe 5 through a connecting pipe 3. The other end of the water suction pipe 5 is connected to a water collection pipe 11. The end of the water collection pipe 11 is connected to a vertical shaft 12. An automatic air pump 13 is installed at the top inside the vertical shaft 12, and a water pump 18 is installed at the bottom.
[0043] Example 3
[0044] The underground drainage and vertical shaft negative pressure boosting device in this embodiment includes a filter layer 2 installed in the depression. The filter layer 2 is connected to a water suction pipe 5 through a connecting pipe 3. The other end of the water suction pipe 5 is connected to a water collection pipe 11. The end of the water collection pipe 11 is connected to a vertical shaft 12. An automatic air pump 13 is installed at the top inside the vertical shaft 12, and a water pump 18 is installed at the bottom.
[0045] The upper end of the filter layer 2 is connected to the surface of the depression. It is a conical tubular structure that is wider at the top and narrower at the bottom. Different filter materials with gradually increasing particle size from top to bottom are placed inside. The filter materials are wrapped by geotextile 4.
[0046] Both the water intake pipe 5 and the water collection pipe 11 have a certain slope. Both are polyethylene double-wall corrugated pipes with an anti-stick coating on the inner wall.
[0047] Example 4
[0048] The underground drainage and vertical shaft negative pressure boosting device in this embodiment includes a filter layer 2 installed in the depression. The filter layer 2 is connected to a water suction pipe 5 through a connecting pipe 3. The other end of the water suction pipe 5 is connected to a water collection pipe 11. The end of the water collection pipe 11 is connected to a vertical shaft 12. An automatic air pump 13 is installed at the top inside the vertical shaft 12, and a water pump 18 is installed at the bottom.
[0049] The upper end of the filter layer 2 is connected to the surface of the depression. It is a conical tubular structure that is wider at the top and narrower at the bottom. Different filter materials with gradually increasing particle size from top to bottom are placed inside. The filter materials are wrapped by geotextile 4.
[0050] Both the water intake pipe 5 and the water collection pipe 11 have a certain slope. Both are polyethylene double-wall corrugated pipes with an anti-stick coating on the inner wall.
[0051] Multiple water inlet holes 6 are provided on the top and sides of the corrugated recess on the outer wall of the water intake pipe 5. The water inlet holes 6 are cone-shaped funnels with a structure that is wider at the top and narrower at the bottom.
[0052] A permeable filter layer 7 and a filter screen 10 are arranged sequentially from the outside to the inside at the inlet of the water inlet 6. The permeable filter layer 7 includes a crushed stone layer 8 and a gravel layer 9 arranged sequentially from the outside to the inside. The crushed stone layer 8 is composed of small-sized crushed stone with a thickness of 5cm, and the gravel layer 9 is composed of larger-sized gravel with a thickness of 3cm. Both the crushed stone layer 8 and the gravel layer 9 are wrapped with geotextile 4. The filter screen 10 has a thickness of 1cm.
[0053] Example 5
[0054] The underground drainage and vertical shaft negative pressure boosting device in this embodiment includes a filter layer 2 installed in the depression. The filter layer 2 is connected to a water suction pipe 5 through a connecting pipe 3. The other end of the water suction pipe 5 is connected to a water collection pipe 11. The end of the water collection pipe 11 is connected to a vertical shaft 12. An automatic air pump 13 is installed at the top inside the vertical shaft 12, and a water pump 18 is installed at the bottom.
[0055] The upper end of the filter layer 2 is connected to the surface of the depression. It is a conical tubular structure that is wider at the top and narrower at the bottom. Different filter materials with gradually increasing particle size from top to bottom are placed inside. The filter materials are wrapped by geotextile 4.
[0056] Both the water intake pipe 5 and the water collection pipe 11 have a certain slope. Both are polyethylene double-wall corrugated pipes with an anti-stick coating on the inner wall.
[0057] Multiple water inlet holes 6 are provided on the top and sides of the corrugated recess on the outer wall of the water intake pipe 5. The water inlet holes 6 are cone-shaped funnels with a structure that is wider at the top and narrower at the bottom.
[0058] A permeable filter layer 7 and a filter screen 10 are arranged sequentially from the outside to the inside at the inlet of the water inlet 6. The permeable filter layer 7 includes a crushed stone layer 8 and a gravel layer 9 arranged sequentially from the outside to the inside. The crushed stone layer 8 is composed of small-sized crushed stone with a thickness of 5cm, and the gravel layer 9 is composed of larger-sized gravel with a thickness of 3cm. Both the crushed stone layer 8 and the gravel layer 9 are wrapped with geotextile 4. The filter screen 10 has a thickness of 1cm.
[0059] The automatic air pump 13 is connected to a conical air pumping pipe 14, the smaller diameter end of which is connected to the automatic air pump 13. The air pumping pipe 14 is higher than the liquid level in the well. The automatic air pump 13 is also connected to an exhaust pipe 15, which leads to the outside of the well.
[0060] Example 6
[0061] The underground drainage and vertical shaft negative pressure boosting device in this embodiment includes a filter layer 2 installed in the depression. The filter layer 2 is connected to a water suction pipe 5 through a connecting pipe 3. The other end of the water suction pipe 5 is connected to a water collection pipe 11. The end of the water collection pipe 11 is connected to a vertical shaft 12. An automatic air pump 13 is installed at the top inside the vertical shaft 12, and a water pump 18 is installed at the bottom.
[0062] The upper end of the filter layer 2 is connected to the surface of the depression. It is a conical tubular structure that is wider at the top and narrower at the bottom. Different filter materials with gradually increasing particle size from top to bottom are placed inside. The filter materials are wrapped by geotextile 4.
[0063] Both the water intake pipe 5 and the water collection pipe 11 have a certain slope. Both are polyethylene double-wall corrugated pipes with an anti-stick coating on the inner wall.
[0064] Multiple water inlet holes 6 are provided on the top and sides of the corrugated recess on the outer wall of the water intake pipe 5. The water inlet holes 6 are cone-shaped funnels with a structure that is wider at the top and narrower at the bottom.
[0065] A permeable filter layer 7 and a filter screen 10 are arranged sequentially from the outside to the inside at the inlet of the water inlet 6. The permeable filter layer 7 includes a crushed stone layer 8 and a gravel layer 9 arranged sequentially from the outside to the inside. The crushed stone layer 8 is composed of small-sized crushed stone with a thickness of 5cm, and the gravel layer 9 is composed of larger-sized gravel with a thickness of 3cm. Both the crushed stone layer 8 and the gravel layer 9 are wrapped with geotextile 4. The filter screen 10 has a thickness of 1cm.
[0066] The automatic air pump 13 is connected to a conical air pumping pipe 14, the smaller diameter end of which is connected to the automatic air pump 13. The air pumping pipe 14 is higher than the liquid level in the well. The automatic air pump 13 is also connected to an exhaust pipe 15, which leads to the outside of the well.
[0067] An isolation mesh cover 22 is provided at the end of the exhaust pipe 15, and a pressure monitor 16 is also provided on the exhaust pipe 15.
[0068] A Venturi jet 19 and a pumping pipe 20 are connected sequentially to the outlet of the water pump 18, with the pumping pipe 20 leading to the outside of the well.
Claims
1. A device for underground drainage in depressions and negative pressure flow boosting in vertical shafts, characterized in that, It includes a filter layer (2) set in the depression, the filter layer (2) is connected to the water suction pipe (5) through the connecting pipe (3), the other end of the water suction pipe (5) is connected to the water collection pipe (11), and the end of the water collection pipe (11) is connected to the vertical shaft (12); an automatic air pump (13) is set at the top inside the vertical shaft (12), and a water pump (18) is set at the bottom.
2. The underground drainage and vertical shaft negative pressure boosting device according to claim 1, characterized in that, The upper end of the filter layer (2) is connected to the surface of the depression. It is a conical tube structure that is wider at the top and narrower at the bottom. Different filter materials with gradually increasing particle size from top to bottom are placed inside. The filter materials are wrapped by geotextile (4).
3. The underground drainage system for depressions and the negative pressure boosting device for vertical shafts according to claim 1, characterized in that, Both the water intake pipe (5) and the water collection pipe (11) have a certain slope. Both are polyethylene double-wall corrugated pipes with an anti-stick coating on the inner wall.
4. The underground drainage system for depressions and the negative pressure boosting device for vertical shafts according to claim 3, characterized in that, The top and side of the corrugated recess on the outer wall of the water-absorbing pipe (5) are provided with multiple water inlet holes (6). The water inlet holes (6) are cone-shaped funnels with a structure that is wider at the top and narrower at the bottom.
5. The underground drainage and vertical shaft negative pressure boosting device according to claim 4, characterized in that, The inlet of the water inlet (6) is provided with a permeable filter layer (7) and a filter screen (10) arranged sequentially from the outside to the inside. The permeable filter layer (7) includes a crushed stone layer (8) and a gravel layer (9) arranged sequentially from the outside to the inside. The crushed stone layer (8) is composed of crushed stone with a small particle size and a thickness of 5cm. The gravel layer (9) is composed of gravel with a large particle size and a thickness of 3cm. Both the crushed stone layer (8) and the gravel layer (9) are wrapped with geotextile (4). The filter screen (10) has a thickness of 1cm.
6. The underground drainage and vertical shaft negative pressure boosting device according to claim 1, characterized in that, The automatic air pump (13) is connected to a conical air pump pipe (14), the small diameter end of which is connected to the automatic air pump (13). The air pump pipe (14) is higher than the liquid level in the well. The automatic air pump (13) is also connected to an exhaust pipe (15), which leads to the outside of the well.
7. The underground drainage and vertical shaft negative pressure boosting device according to claim 6, characterized in that, An isolation mesh cover (22) is provided at the end of the exhaust pipe (15), and a pressure monitor (16) is also provided on the exhaust pipe (15).
8. The underground drainage and vertical shaft negative pressure boosting device according to claim 1, characterized in that, The outlet of the water pump (18) is connected in sequence to a Venturi jet (19) and a water pumping pipe (20), which leads to the outside of the well.
9. The underground drainage and vertical shaft negative pressure boosting device according to claim 1, characterized in that, A water level monitor (17) is installed below the interface between the water collection pipe (11) and the vertical shaft (12).
10. The underground drainage and vertical shaft negative pressure boosting device according to claim 1, characterized in that, The top of the shaft (12) is provided with a sealing cover (21).