Detachable device for increasing flow, controlling and reducing pollution of underground pipe

Abstract

The application discloses a detachable integrated device for increasing flow, controlling and discharging and reducing pollution of a buried pipe, and belongs to the technical field of water environment treatment and agricultural water conservancy engineering, and comprises a filtering device, a controlling and discharging device and a flow increasing device, wherein the filtering device is movably connected to a water outlet end of the buried pipe, the controlling and discharging device is installed at the water outlet end of the filtering device, and the flow increasing device is installed at the water outlet end of the controlling and discharging device. The application solves the problem of serious non-point source pollution caused by the fact that the conventional farmland buried pipe only has the functions of draining and reducing subsidence, and lacks the function of blocking and controlling nitrogen, phosphorus and other nutrients. The application integrates the functions of preventing blockage, filtering and controlling flow, and compared with the conventional pollution removal method, the application significantly reduces the occupied space, reduces the operation and maintenance cost, has a short deployment period, and can also play a regulating role on the drainage of the buried pipe, thereby improving the efficiency and economic benefits of the treatment of agricultural non-point source pollution.

Description

Technical Field

[0001] This invention relates to the fields of water environment management and agricultural water conservancy engineering technology, specifically to a detachable underground pipe integrated device for increasing flow, controlling discharge, and reducing pollution. Background Technology

[0002] In my country's agricultural production, the excessive and improper use of chemical fertilizers and pesticides is widespread, with nitrogen and phosphorus loss being particularly prominent. These substances enter river and lake systems through surface runoff and soil infiltration, forming non-point source pollution. Traditional underground irrigation systems in farmland focus on drainage and waterlogging reduction, lacking control over nutrients such as nitrogen and phosphorus, thus exacerbating non-point source pollution. The treatment of non-point source pollution involves two approaches: source control, including restricting fertilizer use, water conservation, and precision irrigation, but fertilizer use is directly related to crop yield, and farmers often lack the expertise to master complex irrigation techniques; and end-of-pipe interception, including the construction of ecological ditches, wetlands, and sedimentation ponds, but these methods require significant land use, are costly, and cannot effectively curb non-point source pollution.

[0003] Therefore, how to provide a detachable, concealed pipe integrated device for increasing flow, controlling discharge, and reducing pollution, and to solve the defects in the existing technology, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address this issue, the present invention provides a detachable underground pipe integrated device for increasing flow, controlling discharge, and reducing pollution, in order to solve the problem of severe non-point source pollution caused by the fact that traditional underground pipes in farmland only have the function of draining water and reducing saturation, and lack the ability to control nutrients such as nitrogen and phosphorus.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention discloses a detachable concealed pipe integrated device for increasing flow, controlling discharge, and reducing pollution, comprising:

[0007] The filter device is movably connected to the outlet end of the concealed pipe;

[0008] The discharge control device is installed at the outlet end of the filter device;

[0009] A flow booster is installed at the outlet end of the control and discharge device.

[0010] Furthermore, the filtration device includes:

[0011] Rotary straight connectors are installed in pairs, one of which is connected to the concealed pipe and the other is connected to the control and discharge device;

[0012] Several filter tubes, filled with filter media, are provided with reducing joints at both ends of the filter tubes.

[0013] Several 90° elbows are used to connect the rotary straight connector and the filter tube. Several filter tubes are connected in series by the 90° elbows and connected between two rotary straight connectors.

[0014] The diameter D of the filter tube should meet the following conditions:

[0015]

[0016] Where d is the diameter of the reducing joint, H is the height of the 90° elbow, and T is the thickness of the 90° elbow.

[0017] Furthermore, there are four filter tubes. The filter material inside the filter tube connected to the underground pipe is a water-filtering sponge, and the filter material inside the other three filter tubes is zeolite wrapped in geotextile, coconut shell activated carbon, and ceramic rings.

[0018] Furthermore, the zeolite has a particle size of 2-4 mm, the coconut shell activated carbon has a particle size of 2-4 mm, and the ceramic ring has a bottom diameter of 10 mm and a height of 10 mm.

[0019] Furthermore, the control and discharge device includes a main ball valve, a main tee pipe, several branch tee pipes, a control and discharge elbow, and several branch ball valves. The inlet end of the main ball valve is connected to the filter device, and the outlet end of the main ball valve is connected to the flow booster device through the main tee pipe. Several branch tee pipes are connected vertically above the main tee pipe, and each branch tee pipe is connected to a branch ball valve. The uppermost branch tee pipe is connected to a control and discharge elbow, which is connected to a branch ball valve.

[0020] Furthermore, the flow boosting device includes a flow boosting elbow and a diamond-shaped tube. One end of the flow boosting elbow is connected to the control and discharge device, and the other end of the flow boosting elbow is connected to the diamond-shaped tube.

[0021] Furthermore, the rhomboid tube includes an expanding section and a contracting section, the angle between the expanding section and the virtual vertical plane is α, 30°≤α≤45°; the angle between the contracting section and the virtual vertical plane is β, 30°≤β≤45°.

[0022] Furthermore, the filter device is located on the same reference plane, and the angle between the reference plane where the filter device is located and the horizontal plane is φ, where 0°≤φ≤90°.

[0023] Furthermore, the length of the filter tube is L, where 20cm ≤ L ≤ 40cm.

[0024] The present invention has the following advantages:

[0025] This invention integrates anti-clogging, filtration, and flow control functions into one device by incorporating a filtration unit, a drainage control unit, and a flow booster. Compared to traditional pollution removal methods, this device significantly reduces space requirements, lowers maintenance costs, and shortens deployment cycles. It also regulates drainage from concealed pipes. Furthermore, the various parts of the device are connected via pipe fittings, allowing for easy disassembly and replacement. The filter media can also be freely replaced according to different scenarios and needs, facilitating maintenance and adapting to varying water quality conditions, thus improving the device's versatility and flexibility.

[0026] By incorporating a filtration system, a combination of various filter media is used for decontamination, effectively intercepting small particles of sediment and adsorbing pollutants such as nitrogen, phosphorus, and pesticide residues in the water. This improves water transparency and removes odors. Furthermore, the filtration system can adjust the angle φ with the horizontal plane to change the residence time of the drainage in the filter pipe, achieving controlled drainage at different heights. The drainage height can be arbitrarily adjusted to meet different drainage needs, and this control device is optional, increasing the system's versatility. The flow-enhancing device stabilizes the water flow, preventing the formation of air bubbles and separation from the pipe wall, thus ensuring uninterrupted siphon flow and achieving a flow-enhancing effect. Attached Figure Description

[0027] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0028] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0029] Figure 1 A front view of the detachable concealed pipe flow enhancement, control, discharge and pollution reduction integrated device provided by the present invention;

[0030] Figure 2 A perspective view of the detachable concealed pipe flow enhancement, control, discharge, and pollution reduction integrated device provided by the present invention;

[0031] Figure 3 This is a front view of the filter tube provided by the present invention;

[0032] Figure 4 A perspective view of the flow booster device provided by the present invention;

[0033] Figure 5 Right view of the filtering device provided by the present invention.

[0034] In the diagram: 2. Filter device; 21. Rotary straight connector; 22. Filter tube; 23. Reducer; 24. 90° elbow; 3. Drainage control device; 31. Main ball valve; 32. Main tee; 33. Branch tee; 34. Drainage control elbow; 35. Branch ball valve; 4. Flow booster; 41. Flow booster elbow; 42. Diamond-shaped tube; 421. Expansion section; 422. Contraction section. Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please refer to Figures 1-5 The present invention will now describe the detachable concealed pipe flow enhancement, control, and pollution reduction integrated device. The invention consists of four parts, as follows: Figure 1 As shown, it includes a filter device 2, a control and discharge device 3, and a flow booster device 4. The filter device 2 is movably connected to the outlet end of the concealed pipe, the control and discharge device 3 is installed at the outlet end of the filter device 2, and the flow booster device 4 is installed at the outlet end of the control and discharge device 3.

[0037] In this embodiment, the device mainly consists of a filter device 2, a flow control device 3, a flow booster device 4, and pipe connectors. Different components can be selected to achieve different functions. The pipe connectors are commonly used connecting pipes in the prior art. Connecting pipes are components commonly used by those skilled in the art, used to connect various components within a piping system. Their length can be changed as needed, so they will not be described in detail in the specification. It is sufficient to know that connecting pipes are used between the internal components of each device when necessary.

[0038] like Figure 2As shown, the filter device 2 includes a rotary straight connector 21, several filter tubes 22, and several 90° elbows 24. The rotary straight connectors 21 are arranged in pairs, one of which is connected to a concealed pipe, and the other is connected to the control and discharge device 3. The filter tubes 22 are filled with filter media, and reducers 23 are installed at both ends of the filter tubes 22. The several 90° elbows 24 are used to connect the rotary straight connectors 21 and the filter tubes 22. The filter tubes 22 are connected in series end to end through the 90° elbows 24 and connected to the two rotary straight connectors 21. Preferably, there are four filter tubes 22. The filter material inside the filter tube 22 connected to the underground pipe is a water-filtering sponge, and the filter material inside the other three filter tubes 22 is zeolite, coconut shell activated carbon and ceramic ring wrapped with geotextile. Preferably, the particle size of the zeolite is 2-4 mm, the particle size of the coconut shell activated carbon is 2-4 mm, and the bottom diameter and height of the ceramic ring are 10 mm. Preferably, the filter device 2 is located on the same reference plane, and the angle between the reference plane where the filter device 2 is located and the horizontal plane is φ, 0°≤φ≤90°.

[0039] In this embodiment, the filtration device 2 consists of 2-4 sets of cylindrical pipe assemblies connected in series, mainly divided into an inlet section, a filtration section, and an outlet section. Each set consists of a 90° elbow 24, a reducer 23, and a cylindrical filter tube 22. The inlet section is connected to the concealed pipe, and the outlet section is connected to the subsequent parts of the device using a rotary straight connector 21. The filtration section consists of 2-4 cylindrical filter tubes 22. The first filter tube is filled with a filter sponge, which can effectively intercept and drain small particles of silt, preventing them from entering the filter media and causing blockage. The second to fourth filter tubes are filled with zeolite, coconut shell activated carbon, ceramic rings, and geotextile. The zeolite has a particle size of 2-4 mm, the coconut shell activated carbon has a particle size of 2-4 mm, and the ceramic rings have a bottom diameter of 10 mm and a height of 10 mm. The three filter media are uniformly mixed and then wrapped with geotextile. The filter tubes 2, 3, and 4 are fully filled with geotextile wrapped with the mixed filter media. Zeolite effectively adsorbs nitrogen from water, while coconut shell activated carbon effectively adsorbs pesticide residues and phosphorus, improving water transparency and removing odors. The 2-4mm particle size of both zeolite and coconut shell activated carbon balances filtration efficiency with water flowability. Ceramic rings primarily purify drainage through microbial action, reducing nitrogen and organic matter content. Geotextile effectively prevents filter media loss and assists filter sponges in intercepting small particles of sediment. The filter media can be freely replaced according to different scenarios and needs.

[0040] like Figure 3 As shown, considering the practical application of the device, the diameter and length of the filter tube 22 should meet the following requirements:

[0041]

[0042] 20cm≤L≤40cm

[0043] In the formula, d is the diameter of the reducing connector 23, D is the diameter of the filter tube 22, H is the height of the 90° elbow 24, T is the thickness of the 90° elbow 24 (which can be ignored), and L is the length of the filter tube 22.

[0044] The diameter and length of the filter pipe 22 are also related to the diameter and burial depth of the concealed pipe, as well as the space available at the pipe outlet. Under normal circumstances, the height H of the 90° elbow 24 is 10cm, the diameter d of the reducer 23 is 2cm, and the thickness is negligible; therefore, the diameter (outer wall) should not exceed 160mm. The length of the filter pipe 22 determines the filtration effect and drainage height control of the filter device 2. While a longer filter pipe 22 can provide better filtration capacity and a higher drainage height control, it also requires more space. Therefore, a length of 20-40cm is recommended for the filter pipe 22. The number of filter pipes 22 depends on the specific situation, but is typically 2-4.

[0045] like Figure 5 As shown, by rotating the straight connector 21, the filter device 2 can effectively change the residence time of the water in the filter pipe 22 by controlling different angles φ between the filter device 2 and the horizontal plane, thereby controlling the filtration efficiency and also achieving the function of controlling drainage. When φ = 0°, the residence time of the water in the filter pipe 22 is the minimum, and no drainage control is achieved; as φ increases, the residence time of the water in the filter pipe 22 increases, and the controlled drainage height also gradually increases; when φ = 90°, the residence time of the water in the filter pipe 22 is the longest, and the controlled drainage height reaches its maximum.

[0046] like Figure 2 As shown, the control and discharge device 3 includes a main ball valve 31, a main tee pipe 32, several branch tee pipes 33, a control and discharge elbow 34, and several branch ball valves 35. The inlet end of the main ball valve 31 is connected to the filter device 2, and the outlet end of the main ball valve 31 is connected to the flow booster device 4 through the main tee pipe 32. Several branch tee pipes 33 are connected vertically above the main tee pipe 32. Each branch tee pipe 33 is connected to a branch ball valve 35. The uppermost branch tee pipe 33 is connected to a control and discharge elbow 34, and the control and discharge elbow 34 is connected to a branch ball valve 35.

[0047] In this embodiment, the drainage control device 3 is usually arranged vertically. The height of the drainage outlet is controlled by adjusting the distance between the branch tee pipe 33 and the connecting pipe. The branch tee pipe 33 and the main tee pipe 32 form a "T" shape. Each branch is connected to a branch ball valve 35 to achieve independent control.

[0048] The height and number of branches of the drainage control device 3 need to be determined based on factors such as the burial depth of the underground pipe, the groundwater depth, and the controlled drainage height. Since the filter device 2 can play a role in drainage control when φ increases, the drainage control device 3 is optional. Compared with the filter device 2, the drainage control device 3 uses the water level difference between the outlet and the inlet as the controlled drainage height, while the filter device 2 uses the water level difference between the vertical height of the filter pipe 22 and the inlet as the controlled drainage height. Given the flow velocity, Bernoulli's equation shows that increasing the head at the outlet under the action of the drainage control device 3 can reduce the flow rate at the outlet. In addition, the drainage control device 3 can arbitrarily adjust the controlled drainage height through the main ball valve 31 and several branch ball valves 35, for example, 0, 10, 20, 40 cm, etc.

[0049] like Figure 4 As shown, the flow boosting device 4 includes a flow boosting elbow 41 and a rhomboid tube 42. One end of the flow boosting elbow 41 is connected to the control and discharge device 3, and the other end of the flow boosting elbow 41 is connected to the rhomboid tube 42. Preferably, the rhomboid tube 42 includes an expansion section 421 and a contraction section 422. The angle between the expansion section 421 and the virtual vertical plane is α, 30°≤α≤45°; the angle between the contraction section 422 and the virtual vertical plane is β, 30°≤β≤45°.

[0050] In this embodiment, the flow boosting device 4 consists of a flow boosting elbow 41 (a 90° elbow) connected to a diamond-shaped pipe 42, with the outlet facing downwards. Compared to a straight pipe, when connected to a straight pipe, the pressure inside the concealed pipe filled with water (without air) is P. 管内 =P0+ρgh 埋深 The pressure at the pipe opening is P. 管口 =P0, P 管内 >P 管口Therefore, a siphon flow can be formed. However, the straight pipe structure makes it easy for the water to separate from the pipe wall during flow, allowing air to enter more easily and ultimately disrupting the pressure balance and interrupting the siphon. Compared to the straight pipe, the rhomboid pipe 42, due to its structural advantages, has a larger cross-sectional area and reduced flow velocity in the expansion section 421. According to Bernoulli's principle, the local pressure increases, preventing external air from entering the pipe. In the contraction section 422, the cross-sectional area decreases and the flow velocity increases, maintaining flow balance. Because the velocity changes in the expansion and contraction sections 421 and 422 are gradual, the flow state is stable, making it less likely for bubbles to form or for the water to separate from the pipe wall, thus preventing air from entering the pipe. To avoid water flow separation caused by large bending angles, which could lead to turbulence, the water flow is closely related to the expansion and contraction angles of the rhomboid pipe 42. If the angle is too small, the pipe will be too long, limiting the layout; if the angle is too large, the water flow will be unstable, causing some pressure loss. Therefore, the expansion and contraction angles should be selected within the range of 30°-45°. Considering practical applications, ease of manufacturing, replacement, and layout, 30° or 45° can be chosen as the expansion and contraction angles. Under normal circumstances, the rhomboid tube 42 can increase flow in the vertical direction and also achieve normal outflow in the horizontal direction or without installation (depending on the specific situation).

[0051] The following are the experimental conditions and data tables for the device provided in the embodiments of the present invention:

[0052] 1. The water flow velocity in filter device 2 (empty pipe) was analyzed using model simulation. The inlet flow velocity was 0.3 m / s, the diameter of the concealed pipe and main pipe was 9 cm, the length of the pipe connectors was 10 cm, and the diameter of each of the four filter pipes 22 was 15 cm, with a length of 30 cm. To more fully simulate the effects of the device under different configurations, the following combinations are listed as an example, taking the height of the control and discharge device 3 as 50 cm:

[0053]

[0054]

[0055] Note: This simulation does not take into account the application in a real-world scenario and does not take into account the length of the flow booster 4 (approximately 10cm). Therefore, the total length may not be applicable to reality and is provided for reference only.

[0056] (2) The main parts can be "disassembled and replaced immediately" according to the diameter of the underground pipe and the water quality conditions. In the rice-wheat rotation area experiment in Gaoyou City, Jiangsu Province, taking zeolite, activated carbon and ceramic rings as examples, the drainage in the open ditch was filtered for 6 hours. The results showed that compared with the original ditch water, the total phosphorus and total nitrogen content in the filtered water was reduced by about 30% and the nitrate content was reduced by 62%, and the purification effect was significant.

[0057] (3) The device integrates anti-clogging, filtration, and flow control. Compared with traditional pollution removal methods, this device can significantly reduce the space occupied, lower operation and maintenance costs, and has a short deployment cycle. In addition, it can play a regulatory role in the drainage of concealed pipes.

[0058] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A detachable, concealed pipe integrated device for increasing flow, controlling discharge, and reducing pollution, characterized in that: include: The filter device (2) is movably connected to the outlet end of the concealed pipe; The discharge control device (3) is installed at the outlet end of the filter device (2); A flow booster (4) is installed at the outlet end of the control and discharge device (3); The control and discharge device (3) includes a main ball valve (31), a main tee pipe (32), several branch tee pipes (33), a control and discharge elbow (34), and several branch ball valves (35). The inlet end of the main ball valve (31) is connected to the filter device (2), and the outlet end of the main ball valve (31) is connected to the flow booster device (4) through the main tee pipe (32). Several branch tee pipes (33) are connected vertically above the main tee pipe (32), and each branch tee pipe (33) is connected to a branch ball valve (35). The uppermost branch tee pipe (33) is connected to a control and discharge elbow (34), and the control and discharge elbow (34) is connected to a branch ball valve (35). The flow boosting device (4) includes a flow boosting elbow (41) and a rhomboid tube (42). One end of the flow boosting elbow (41) is connected to the control and discharge device (3), and the other end of the flow boosting elbow (41) is connected to the rhomboid tube (42). The rhomboid tube (42) includes an expanding section (421) and a contracting section (422). The angle between the expanding section (421) and the virtual vertical plane is α, where 30°≤α≤45°; the angle between the contracting section (422) and the virtual vertical plane is β, where 30°≤β≤45°; the virtual vertical plane is the plane containing the vertical diagonal of the rhomboid tube (42).

2. The detachable concealed pipe flow enhancement, control, and pollution reduction integrated device as described in claim 1, characterized in that, The filter device (2) includes: Rotary straight connectors (21) are provided in pairs, one of which is connected to the concealed pipe and the other is connected to the control and discharge device (3); Several filter tubes (22) are filled with filter media, and reducer joints (23) are installed at both ends of the filter tubes (22). Several 90° elbows (24) are used to connect the rotary straight connector (21) and the filter tube (22). Several filter tubes (22) are connected in series by the 90° elbows (24) and connected between two rotary straight connectors (21).

3. The detachable concealed pipe flow enhancement, control, and pollution reduction integrated device as described in claim 2, characterized in that, The number of filter tubes (22) is four. The filter material inside the filter tube (22) connected to the underground pipe is a water-filtering sponge. The filter material inside the other three filter tubes (22) is a mixed filter material wrapped with geotextile. The mixed filter material is zeolite, coconut shell activated carbon and ceramic rings.

4. The detachable concealed pipe flow enhancement, control, and pollution reduction integrated device as described in claim 3, characterized in that, The zeolite has a particle size of 2-4 mm, the coconut shell activated carbon has a particle size of 2-4 mm, and the ceramic ring has a bottom diameter of 10 mm and a height of 10 mm.

5. The detachable concealed pipe flow enhancement, control, and pollution reduction integrated device as described in claim 2, characterized in that, The filter device (2) is located on the same reference plane, and the angle between the reference plane where the filter device (2) is located and the horizontal plane is φ, 0°≤φ≤90°.

6. The detachable concealed pipe flow enhancement, control, and pollution reduction integrated device as described in claim 2, characterized in that, The length of the filter tube (22) is L, 20cm≤L≤40cm.

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