Siphon drainage device

Abstract

The utility model relates to the technical field of underground water precipitation, in particular to a siphon drainage device. The siphon drainage pipe dredging device can exhaust gas of a siphon drainage pipe, effectively dredge the siphon drainage pipe and guarantee normal flowing of siphon water flow. Comprising a pumping well, a water pump, a pumping pipe, a drainage header pipe, a flushing pipe and a siphon drainage pipe, one end of the siphon drainage pipe extends into an underground aquifer to be dewatered, the other end of the siphon drainage pipe extends into the inner bottom of the pumping well, and the water level in the pumping well is lower than the water level of the underground aquifer to be dewatered. A percolation pipe fitting is arranged at the end, stretching into the underground aquifer, of the siphon drainage pipe, a plurality of percolation holes which are evenly distributed in the circumferential direction are formed in the percolation pipe fitting, one-way valves which only allow external water to enter the percolation pipe fitting are installed in the percolation holes, and the input end of the water suction pump communicates with the output end of the water suction pipe. And the output end of the water pumping pipe extends into the inner bottom of the water pumping well.

Description

Technical Field

[0001] This utility model relates to the technical field of groundwater dewatering, and in particular to a siphon drainage device. Background Technology

[0002] In construction projects in coastal areas and on soft soil foundations, foundation reinforcement is a crucial means of improving the bearing capacity of the foundation. Common methods for soft soil foundation reinforcement include replacement, electro-osmosis, pile foundations, and drainage consolidation. However, these methods suffer from drawbacks such as high construction difficulty and cost. Especially in cases where soft soil foundations lack natural topographic relief or have low soil permeability, traditional drainage methods cannot achieve effective drainage, thus affecting the foundation consolidation effect.

[0003] Chinese invention patent CN102296589A discloses a foundation dewatering method using a wellpoint pumping system with a group of siphon pipes. First, a siphon drainage pipe is inserted into the foundation soil where the groundwater level needs to be lowered. A permeable layer is wrapped around the inserted section of the drainage pipe, allowing groundwater in the foundation soil to seep down the outer wall of the siphon drainage pipe to its inlet. The other end of the drainage pipe is placed in a pumping well. A pump with a water level control system lowers the groundwater level in the pumping well, allowing groundwater in the foundation soil to enter the pumping well through the siphon pipe. The pump then pumps the water from the pumping well to the surface, thus lowering the groundwater level in the foundation soil. This method concentrates groundwater from various parts of the foundation soil into the pumping well through the siphon drainage pipe. Siphon drainage only requires controlling the groundwater level difference; the siphon process can be maintained regardless of the flow rate, effectively solving the drainage problem of low-permeability soft soil foundations.

[0004] However, during the actual implementation, the inventors discovered the following defects: when there is too much gas or silt in the siphon drainage pipe, it can easily cause the siphon to stop or the pipe to become blocked, affecting the efficiency of siphon precipitation and thus having certain limitations in use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the existing technology, this utility model provides a siphon drainage device that can discharge gas from the siphon drainage pipe and effectively unclog the siphon drainage pipe to ensure the normal flow of siphon water.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a siphon drainage device, comprising a pumping well, a pumping pump, a pumping pipe, a main drainage pipe, a flushing pipe, and a siphon drainage pipe. One end of the siphon drainage pipe extends into the underground aquifer to be dewatered, and the other end extends into the bottom of the pumping well. The water level in the pumping well is lower than the water level in the underground aquifer to be dewatered. A percolation fitting is provided at the end of the siphon drainage pipe extending into the underground aquifer. The percolation fitting has multiple circumferentially distributed percolation holes. A one-way valve, allowing only external water to enter the percolation fitting, is installed inside each percolation hole. The pump's input end is connected to the output end of the pumping pipe, which extends to the bottom of the pumping well. The pump's output end is connected to the input end of the main drainage pipe. The flushing pipe is connected to one output end of the main drainage pipe, and a switch valve is installed on the flushing pipe. The other end of the flushing pipe extends to the bottom of the percolation fitting, and its output end is connected to the interior of the percolation fitting. Furthermore, the bottom of the percolation fitting is provided with a sealing head, and the bottom of the flushing pipe is connected to the sealing head. Multiple circumferentially distributed liquid inlet holes are provided at the connection between the flushing pipe and the sealing head. The central axis of the flushing pipe coincides with the central axis of the main drainage pipe.

[0009] Preferably, the percolation fitting is a venturi tube, and the percolation hole is located at the neck of the venturi tube.

[0010] Preferably, a filter screen is fitted over the percolation holes on the percolation pipe fitting.

[0011] Preferably, there are multiple infiltration pipe fittings, which are detachably connected end to end, and all of them are located within the underground aquifer; furthermore, the infiltration pipe fittings are threadedly connected, and the length of the infiltration pipe fittings can be a standard length such as 200mm, 300mm, 400mm, or 500mm.

[0012] Preferably, the inner diameter of the main drain pipe is larger than the inner diameter of the flushing pipe; further, the inner diameter of the flushing pipe can be 1 / 4 to 1 / 3 of the inner diameter of the main drain pipe.

[0013] Preferably, there are multiple siphon drain pipes and flushing pipes, with the multiple siphon drain pipes evenly distributed around the pumping well at equal intervals; further, the flushing pipes are inserted into the corresponding siphon drain pipes, and the siphon drain pipes are evenly distributed around the pumping well in a circular or rectangular array at equal intervals.

[0014] Preferably, both the siphon drainage pipe and the infiltration pipe fitting are made of rigid pipe; furthermore, the siphon drainage pipe and the infiltration pipe fitting can be made of metal pipe or rigid plastic pipe, and the rigid plastic pipe can be made of PVC, PE, PP-R or other materials.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a siphon drainage device with the following beneficial effects: When siphon drainage is performed, since the liquid level in the pumping well is lower than the liquid level of the aquifer to be dewatered, the one-way valve is in the open state. Water in the aquifer enters the siphon drainage pipe through the permeation holes and flows into the pumping well. The water in the pumping well is then promptly pumped out by the pumping pump. Under the siphon action, automatic dewatering of the aquifer is achieved. When air or blockage occurs in the siphon drainage pipe, the switch valve is opened, and the pumping pump output... Pressurized water enters the bottom of the infiltration pipe through the flushing pipe, increasing the pressure inside the infiltration pipe. The one-way valve closes, and the pressurized water enters the siphon drainage pipe and gradually flows into the pumping well, flushing away air or clogging silt from the siphon drainage pipe. Then, the switch valve is closed. Under the siphon effect, the pressure inside the infiltration pipe decreases, the one-way valve opens, and a normal siphon water flow is formed in the siphon drainage pipe. This can expel air from the siphon drainage pipe and effectively unclog it, ensuring the normal flow of siphon water and thus guaranteeing a smooth drop in the groundwater level. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a top view schematic diagram of the structure of this utility model;

[0019] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0020] Figure 4 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0021] Figure 5 This is the utility model Figure 1 A magnified schematic diagram of the structure at point C in the middle;

[0022] Figure 6 This is the utility model Figure 3 A magnified schematic diagram of the structure at point D in the middle;

[0023] Figure 7 This is the utility model Figure 3 A magnified schematic diagram of the structure at point E in the middle;

[0024] The following are labels in the attached diagram: 1. Pumping well; 2. Pumping pump; 3. Pumping pipe; 4. Main drain pipe; 5. Flushing pipe; 6. Siphon drain pipe; 7. Infiltration hole; 8. Check valve; 9. Switch valve; 10. Venturi tube; 11. Filter screen. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figure 1-4 as well as Figure 6-7 This utility model discloses a siphon drainage device, comprising a pumping well 1, a pumping pump 2, a pumping pipe 3, a main drainage pipe 4, a flushing pipe 5, and a siphon drainage pipe 6. One end of the siphon drainage pipe 6 extends into the underground aquifer to be dewatered, and the other end extends into the bottom of the pumping well 1. The water level in the pumping well 1 is lower than the water level in the underground aquifer. A percolation fitting is provided at the end of the siphon drainage pipe 6 extending into the underground aquifer. The percolation fitting has multiple circumferentially distributed percolation holes 7. A one-way valve 8, which only allows external water to enter the percolation fitting, is installed in each percolation hole 7. The input end of the pumping pump 2... The output end of the pumping pipe 3 is connected to the output end of the pumping pipe 3, which extends into the bottom of the pumping well 1. The output end of the pumping pump 2 is connected to the input end of the drainage main pipe 4. The flushing pipe 5 is connected to one output end of the drainage main pipe 4. A switch valve 9 is installed on the flushing pipe 5. The other end of the flushing pipe 5 extends into the bottom of the percolation fitting. The output end of the flushing pipe 5 is connected to the inside of the percolation fitting. Furthermore, a plug is provided at the bottom of the percolation fitting. The bottom of the flushing pipe 5 is connected to the plug. Multiple circumferentially distributed liquid inlet holes are provided at the connection between the flushing pipe 5 and the plug. The central axis of the flushing pipe 5 coincides with the central axis of the drainage main pipe 4.

[0028] For details, please refer to Figure 1 The percolation pipe fittings consist of multiple fittings, which are detachably connected end to end and are all located within the underground aquifer. Furthermore, the percolation pipe fittings are connected by threads, and the length of the percolation pipe fittings can be standard lengths such as 200mm, 300mm, 400mm, and 500mm.

[0029] Specifically, the inner diameter of the main drain pipe 4 is larger than the inner diameter of the flushing pipe 5; furthermore, the inner diameter of the flushing pipe 5 can be 1 / 4 to 1 / 3 of the inner diameter of the main drain pipe 4.

[0030] Specifically, there are multiple siphon drain pipes 6 and flushing pipes 5 (not shown in the figure), and the multiple siphon drain pipes 6 are evenly distributed around the pumping well 1 at equal intervals; furthermore, the flushing pipes 5 are inserted into the corresponding siphon drain pipes 6, and the siphon drain pipes 6 are evenly distributed in a circular array or rectangular array around the pumping well 1 at equal intervals.

[0031] Specifically, both the siphon drain pipe 6 and the infiltration fittings are made of rigid pipes; furthermore, the siphon drain pipe 6 and the infiltration fittings can be made of metal pipes or rigid plastic pipes, and the rigid plastic pipes can be made of materials such as PVC, PE, and PP-R.

[0032] The siphon drainage device provided in this embodiment can achieve full coverage of the entire aquifer by multiple infiltration pipe fittings, thereby enabling comprehensive water extraction within the aquifer. The infiltration pipe fittings of the corresponding standard size can be selected according to the depth of the aquifer. The inner diameter of the flushing pipe 5 is 1 / 4 to 1 / 3 of the inner diameter of the main drainage pipe 4, ensuring normal drainage in the pumping well 1 while preventing excessive water flow into the infiltration pipe fittings. Multiple siphon drainage pipes 6 and flushing pipes 5 are used to achieve dewatering treatment of a larger area of ​​the aquifer near the pumping well 1, further improving dewatering efficiency. The rigid pipes are not easily deformed, which can effectively prevent deformation of the infiltration pipe fittings under the siphon effect from affecting the normal flow of water, ensuring smooth water flow in the siphon drainage pipe 6 and the infiltration pipe fittings.

[0033] Example 2

[0034] The siphon drainage device provided in Example 1 has been further optimized. For details, please refer to [link / reference]. Figure 6 The percolation pipe fitting adopts a venturi tube 10, and the percolation hole 7 is set at the neck of the venturi tube 10.

[0035] For details, please refer to Figure 5 ; Filter screen covers 11 are fitted at the 7 percolation holes on the percolation pipe fitting.

[0036] The siphon drainage device provided in this embodiment allows water to flow through the constricted throat at the venturi tube 10 during siphon drainage. As the water flow velocity increases, the pressure at the infiltration hole 7 decreases, allowing water from the external aquifer to flow more smoothly into the infiltration pipe fittings, further improving the precipitation efficiency of the aquifer. Meanwhile, the filter screen 11 can reduce the entry of particles such as silt into the infiltration hole 7, reducing the accident rate of blockage of the infiltration hole 7, infiltration pipe fittings, or siphon drainage pipe 6.

[0037] In operation, a pumping well 1 is constructed in the area to be dredged. Multiple evenly distributed pumping holes are drilled around the pumping well 1. One end of the siphon drainage pipe 6 extends into the pumping well 1, and the other end extends into the pumping holes. When siphon drainage is performed, because the liquid level in the pumping well 1 is lower than the liquid level of the aquifer to be dredged, the one-way valve 8 is open. Water from the aquifer enters through the permeation holes 7 into the siphon drainage pipe 6 and flows into the pumping well 1. The pumping pump 2 then promptly removes the water from the pumping well 1. The system is used to achieve automatic precipitation of the aquifer. When air or blockage occurs in the siphon drainage pipe 6, the switch valve 9 is opened, and the pressurized water from the output end of the pump 2 enters the bottom of the infiltration pipe through the flushing pipe 5. The pressure inside the infiltration pipe increases, the one-way valve 8 closes, and the pressurized water enters the siphon drainage pipe 6 and gradually flows into the pumping well 1, washing away the air or blockage of mud and sand in the siphon drainage pipe 6. Then the switch valve 9 is closed. Under the siphon action, the pressure inside the infiltration pipe decreases, the one-way valve 8 opens, and a normal siphon flow is formed in the siphon drainage pipe 6.

[0038] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A siphon drain apparatus, characterized by; The invention relates to a water pumping system, which comprises a water pumping well (1), a water pumping pump (2), a water pumping pipe (3), a water discharging main pipe (4), a flushing pipe (5) and a siphon water discharging pipe (6), one end of the siphon water discharging pipe (6) extends into the underground water layer to be lowered, the other end of the siphon water discharging pipe (6) extends into the bottom of the water pumping well (1), the water level in the water pumping well (1) is lower than the water level in the underground water layer to be lowered, the end of the siphon water discharging pipe (6) extending into the underground water layer is provided with a percolation pipe fitting, a plurality of percolation holes (7) are uniformly distributed on the percolation pipe fitting, a one-way valve (8) is installed in the percolation hole (7) to allow only external water to enter the inside of the percolation pipe fitting, the input end of the water pumping pump (2) is communicated with the output end of the water pumping pipe (3), the output end of the water pumping pipe (3) extends into the bottom of the water pumping well (1), the output end of the water pumping pump (2) is communicated with the input end of the water discharging main pipe (4), the flushing pipe (5) is communicated with one output end of the water discharging main pipe (4), a switch valve (9) is installed on the flushing pipe (5), the other end of the flushing pipe (5) extends into the bottom of the percolation pipe fitting, the output end of the flushing pipe (5) is communicated with the inside of the percolation pipe fitting.

2. The siphonic drain according to claim 1, wherein, The percolation pipe fitting is a Venturi tube (10), and the percolation holes (7) are arranged at the throat of the Venturi tube (10).

3. The siphonic drain according to claim 2, wherein, A filter screen cover (11) is sleeved on the percolation holes (7) of the percolation pipe fitting.

4. The siphonic drain according to claim 3, wherein, The percolation pipe fitting is a plurality of pipe fittings, the plurality of pipe fittings are detachably connected in series, and the plurality of pipe fittings are located in the underground water layer.

5. The siphonic drain according to claim 1, wherein, The inner diameter of the water discharging main pipe (4) is larger than the inner diameter of the flushing pipe (5).

6. The siphonic drain according to claim 1, wherein, The siphon water discharging pipe (6) and the flushing pipe (5) are a plurality of pipes, and the plurality of siphon water discharging pipes (6) are equidistantly and uniformly distributed around the water pumping well (1).

7. The siphonic drain according to claim 1, wherein, The siphon water discharging pipe (6) and the percolation pipe fitting are both made of a hard pipe.

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