Drainage device and drainage system
By using a combination of compression pipes and drain pipes in the drainage device, the gas is accelerated to form high-speed flow using the tapered section, which solves the problem of difficulty in discharge of water in underground facilities, and achieves low-cost and efficient drainage of water, reducing energy consumption and maintenance costs.
Patent Information
- Application Number
- CN202422409456.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In underground facilities such as subway stations and underground wells, water accumulation in low-lying areas is difficult to discharge by itself. The reliance on vacuum pump stations in the existing technology leads to high equipment costs, high energy consumption and complex operation.
A drainage device composed of a compression pipe and a drain pipe is used to accelerate the positive pressure gas to form a high-speed air flow using the tapered section, and liquid is sucked into the drain pipe through the annular gap to achieve the positive pressure discharge of accumulated water.
No vacuum pumping station is required, which reduces equipment costs and energy consumption, simplifies operations, reduces maintenance costs, and improves equipment reliability and water resource recycling efficiency.
Smart Images
Figure CN223190718U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of drainage, and in particular to a drainage device and a drainage system. Background Art
[0002] During the construction of underground facilities such as subway stations and underground wells, water often accumulates in low-lying areas and is difficult to drain away on its own.
[0003] Since water from other areas will continue to gather in low-lying areas (water accumulation points), the relevant technology generally leads a vacuum pipe from the existing vacuum pump station to the low-lying area, and uses the negative pressure generated by the operation of the vacuum pump station to suck out the accumulated water, thereby ensuring that the newly generated accumulated water can be drained away in real time and quickly.
[0004] However, this method relies on vacuum pumping stations, which are often found in large facilities like subway stations and shopping malls, but are not essential in factories. Adding a dedicated vacuum pumping station for drainage would require significant space, high equipment costs, and high energy consumption. Furthermore, operating and maintaining a vacuum pumping station requires technical expertise and additional training for workers. Summary of the Invention
[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a drainage device and a drainage system, wherein the drainage device can drain water accumulated in low-lying areas by using positive pressure.
[0006] The drainage device provided by the present application includes a compression tube and a drainage pipe. The compression tube includes a tapered section located at the outlet end. The cross-sectional area of the tapered section gradually decreases along the direction of gas ejection. The tapered section is used to accelerate the ejected gas. The outlet end of the compression tube extends into the inlet end of the drainage pipe. The tapered section is partially located inside the drainage pipe. An annular gap for sucking in liquid is formed between the compression tube and the drainage pipe.
[0007] The drainage device provided by the present application has at least the following technical effects: by setting a tapered section at the outlet end of the compression tube, the positive-pressure gas can be accelerated into high-speed gas. As the high-speed gas enters the drainage pipe, the liquid around the drainage device is affected by the pressure difference, enters the drainage pipe from the annular gap, and flows along the drainage pipe under the action of the high-speed gas to be discharged. Therefore, the drainage device can use positive pressure to discharge accumulated water in low-lying areas, and does not need to be equipped with a vacuum pump station or other negative pressure suction devices, which helps to reduce implementation costs and energy consumption.
[0008] According to some embodiments of the present application, the diameter of the drain pipe is between the small diameter and the large diameter of the tapered section.
[0009] According to some embodiments of the present application, the minor diameter of the tapered section is 26.67 mm, the major diameter of the tapered section is 80 mm, the length of the tapered section is 70 mm, and the diameter of the drain pipe is 50 mm.
[0010] According to some embodiments of the present application, the distance that the tapered section extends into the drain pipe is 20 mm.
[0011] According to some embodiments of the present application, the profile of the tapered section satisfies the Witosinski formula.
[0012] According to some embodiments of the present application, the tapered section is used to accelerate the ejected gas to a sonic or subsonic speed.
[0013] According to some embodiments of the present application, the outlet end of the compression pipe and the inlet end of the drainage pipe extend in a horizontal direction.
[0014] The drainage system provided in this application includes the drainage device provided in this application.
[0015] According to some embodiments of the present application, the drainage system further includes a compressed gas station and a wastewater well, the inlet end of the compression pipe is connected to the compressed gas station, and the outlet end of the drainage pipe is connected to the wastewater well.
[0016] According to some embodiments of the present application, the drainage system further includes a pressure regulating valve, which is disposed between the compression pipe and the compressed gas station.
[0017] The drainage system provided in the present application includes the drainage device provided in the present application, so the drainage system correspondingly has the beneficial effects provided by the drainage device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and constitute a part of the specification. Together with the embodiments disclosed in this application, they are used to explain the technical solutions disclosed in this application and do not constitute a limitation on the technical solutions disclosed in this application.
[0019] Figure 1 Schematic diagram of the structure of the drainage device according to an embodiment of the present application;
[0020] Figure 2 Schematic diagram of the structure of the drainage device according to an embodiment of the present application;
[0021] Figure 3 It is a structural diagram of the drainage system of an embodiment of the present application.
[0022] Reference numerals:
[0023] Compression tube 100, tapered section 110;
[0024] Drain pipe 200;
[0025] Compressed gas station 310 , wastewater well 320 , and pressure regulating valve 330 . DETAILED DESCRIPTION
[0026] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0027] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.
[0028] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.
[0029] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0030] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0031] Related technologies often use negative pressure suction to continuously drain water from low-lying areas, requiring a vacuum pump station. However, existing vacuum pump stations are often lacking in factories and other locations. Installing a vacuum pump station for drainage purposes would incur high construction and maintenance costs.
[0032] The present application notes that in the field of natural gas extraction, there are designs that use ejected natural gas to discharge accumulated water underground, such as using a nozzle to accelerate natural gas to supersonic speed, and using the shear force generated by the gas to break up the accumulated water into small mist-like droplets, which are then mixed with natural gas and discharged from the wellbore, thereby fully utilizing the pressure energy of natural gas itself and producing good energy-saving effects.
[0033] With reference to the above principles, the present application proposes a drainage device that can drain water from low-lying areas using positive pressure. In addition, the present application also proposes a drainage system based on the drainage device.
[0034] Reference Figure 1 and Figure 2 The drainage device includes a compression tube 100 and a drainage pipe 200. The compression tube 100 includes a tapered section 110 located at the outlet end. Along the ejection direction of the gas, the cross-sectional area of the tapered section 110 gradually decreases. The tapered section 110 is used to accelerate the ejected gas. The outlet end of the compression tube 100 extends into the inlet end of the drainage pipe 200. The tapered section 110 is partially located in the drainage pipe 200. An annular gap for sucking liquid is formed between the compression tube 100 and the drainage pipe 200.
[0035] According to the drainage device of the present application, by setting a tapered section 110 at the outlet end of the compression tube 100, the positive pressure gas can be accelerated into high-speed gas. As the high-speed gas enters the drainage pipe 200, the liquid around the drainage device is affected by the pressure difference and enters the drainage pipe 200 from the annular gap. Under the action of the high-speed gas, it flows along the drainage pipe 200 and is discharged.
[0036] Since the tapered section 110 extends into the drain pipe 200 , gas can stably flow from the compression tube 100 into the drain pipe 200 and is not easily affected by the surrounding liquid, thereby ensuring continuous and stable operation of the drainage device.
[0037] Therefore, the drainage device can use positive pressure to drain accumulated water in low-lying areas without the need for a vacuum pump station or other negative pressure suction device. It is suitable for implementation in scenarios with a positive pressure air source but no negative pressure air source, which helps to reduce implementation costs and energy consumption.
[0038] It is understandable that compressed gas can be obtained from a positive pressure pump station, or compressed gas generated during factory operation can be recovered. For example, the present application can be used in a production workshop that uses gas as a power source, or it can also be used in a gas boiler room in a smelting workshop of a smeltery to generate compressed gas through the waste heat during boiler operation. This helps to reduce the complexity of the drainage system and save modification costs.
[0039] Specifically, the drainage system constructed based on the drainage device of the present application has the following advantages.
[0040] (1) Reduced costs: Compared to conventional vacuum pump station systems, the drainage device of this application significantly reduces equipment costs. By eliminating the complex pump body, control system, and a large number of pipelines, the initial investment cost can be reduced by approximately 30%-50%.
[0041] (2) Energy savings: By utilizing compressed air as a power source and precisely controlling the flow rate to achieve efficient drainage, this application demonstrates significant advantages in energy consumption. Experimental data shows that, for the same drainage volume, this application consumes only 20%-30% of the energy of traditional vacuum pumping station solutions. Long-term operation can save enterprises significant electricity costs.
[0042] (3) Energy conservation and emission reduction: A significant reduction in energy consumption means a reduction in greenhouse gas emissions and other pollutants, which has positive significance for environmental protection. For example, a medium-sized factory can reduce carbon emissions by approximately 50-100 tons per year after adopting this application.
[0043] (4) Reduced maintenance costs: Due to its simple structure and fewer components, the drainage device of this application has relatively low maintenance costs, which reduces downtime and repair costs caused by complex equipment failures and improves overall operational efficiency.
[0044] (5) Recycling of water resources: Efficient water collection can be achieved through efficient drainage. Therefore, this application also helps to promote the recycling of water resources, reduce wastewater discharge, and comply with the concept of sustainable development.
[0045] (6) Simplified operation and maintenance: The drainage device of the present application is easy to operate and does not require a complex control system and highly skilled workers, which reduces the requirements for operators and reduces training costs. At the same time, maintenance is also more convenient, which improves the reliability and service life of the equipment.
[0046] When this application is used in the gas boiler room of the smelting workshop, the drainage effect and efficiency meet the expectations, optimizes the production site working environment and equipment operating environment, effectively improves the equipment operating efficiency, ensures the efficient and stable operation of the induced draft fan, ensures the health of the operators, reduces energy consumption, and reduces the labor intensity of workers.
[0047] For example, referring to Figure 3 In some embodiments of the drainage system, the drainage system also includes a compressed gas station 310 (such as a positive pressure pump station) and a wastewater well 320, the inlet end of the compression pipe 100 is connected to the compressed gas station 310, and the outlet end of the drainage pipe 200 is connected to the wastewater well 320.
[0048] First, through the continuous operation of the drainage device, the accumulated water in each low-lying area is continuously collected into the wastewater well 320. After a certain amount of wastewater is collected, it is centrally and uniformly disposed of.
[0049] Optionally, in some embodiments, the drainage system further includes a pressure regulating valve 330, which is disposed between the compression pipe 100 and the compressed gas station 310. The pressure regulating valve 330 is used to adjust the pressure distribution, thereby ensuring that the compression pipe 100 has an appropriate pressure and generates high-speed gas at an appropriate speed.
[0050] Back to the drainage device, optionally, in some embodiments, after simulation analysis, the diameter of the drain pipe 200 (here refers to the diameter inside the pipe) is set to be between the small diameter of the tapered section 110 (that is, the diameter inside the pipe at the end) and the large diameter (that is, the diameter inside the pipe at the starting end). On the one hand, the diameter of the drain pipe 200 is larger than the small diameter, so the tapered section 110 can extend into the drain pipe 200, and the diameters of the tapered section 110 and the drain pipe 200 can produce an annular gap. On the other hand, the diameter of the drain pipe 200 is smaller than the large diameter, thereby constraining the area ratio of the annular gap and avoiding excessive liquid inhalation leading to unstable flow field.
[0051] For example, the minor diameter of the tapered section 110 is 26.67 mm, the major diameter of the tapered section 110 is 80 mm, the length of the tapered section 110 is 70 mm, and the diameter of the drain pipe 200 is 50 mm.
[0052] At the same time, in order to obtain an annular gap of appropriate size, the distance that the tapered section extends into the drain pipe is 20 mm.
[0053] It is understandable that the shape of the tapered section 110 will affect the quality of the jet flow from the compression tube 100 . If the shape is not designed properly, the ejected gas will be more likely to generate turbulence, which will affect the drainage effect.
[0054] To this end, in some embodiments, the profile of the tapered section 110 satisfies the Witosinski formula, that is:
[0055]
[0056] Where C is the shrinkage ratio, r0 is the radius of the starting end of the tapered section 110, r * is the radius inside the tube at the end, x is the axial distance from the starting end, r is the corresponding radius at the x position, and L is the total length of the tapered section 110 .
[0057] The smooth inner wall surface of the nozzle cavity designed using the Witosinski equation can gradually reduce the lateral pressure gradient and radial velocity component of the water flow entering the nozzle's constriction, resulting in a relatively stable jet stream. Furthermore, the design based on the Witosinski equation facilitates flexible control of the size of the tapered section 110, making it suitable for compression tubes 100 of varying diameters.
[0058] Of course, it is not excluded that other curve formulas may be used to design the profile of the tapered section 110, such as a double arc, a double cubic curve, or a quintic curve.
[0059] In some embodiments, the tapered section 110 is used to accelerate the ejected gas to a sonic or subsonic speed. Preferably, at the outlet of the tapered section 110 , the theoretical velocity of the gas reaches Ma=1.
[0060] In some embodiments, the outlet end of the compression tube 100 and the inlet end of the drainage pipe 200 extend horizontally. In this case, the connection portion of the compression tube 100 and the drainage pipe 200 is suitable for being set close to the bottom of the low-lying area, so as to drain the accumulated water as much as possible and reduce the residue.
[0061] In some optional embodiments, the functions / operations mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, the two boxes shown in succession may actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiments presented and described in the flow chart of the present application are provided in an exemplary manner for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operations and logic flows presented herein. Optional embodiments are contemplated in which the order of the various operations is changed and the sub-operations described as a part of a larger operation are performed independently.
[0062] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A drainage device, characterized in that: include: A compression tube, the compression tube comprising a tapered section at an outlet end, wherein the cross-sectional area of the tapered section gradually decreases along the ejection direction of the gas, and the tapered section is used to accelerate the ejected gas; The outlet end of the compression tube extends into the inlet end of the drainage pipe, the tapered section is partially located in the drainage pipe, and an annular gap for sucking liquid is formed between the compression tube and the drainage pipe.
2. The drainage device according to claim 1, characterized in that The diameter of the drainage pipe is between the small diameter and the large diameter of the tapered section.
3. The drainage device according to claim 2, characterized in that: The minor diameter of the tapered section is 26.67 mm, the major diameter of the tapered section is 80 mm, the length of the tapered section is 70 mm, and the diameter of the drain pipe is 50 mm.
4. The drainage device according to claim 3, characterized in that: The distance that the tapered section extends into the drain pipe is 20 mm.
5. The drainage device according to any one of claims 1 to 4, characterized in that: The profile of the tapered section satisfies the Witoshinsky formula.
6. The drainage device according to claim 1, characterized in that: The tapered section is used to accelerate the ejected gas to a sonic or subsonic speed.
7. The drainage device according to claim 1, characterized in that: The outlet end of the compression pipe and the inlet end of the drainage pipe extend in a horizontal direction.
8. A drainage system, characterized in that: The drainage system comprises the drainage device according to any one of claims 1 to 7.
9. The drainage system according to claim 8, characterized in that: The drainage system further comprises a compressed gas station and a wastewater well. The inlet end of the compression pipe is connected to the compressed gas station, and the outlet end of the drainage pipe is connected to the wastewater well.
10. The drainage system according to claim 9, characterized in that: The drainage system further includes a pressure regulating valve, which is arranged between the compression pipe and the compressed gas station.