Adjustable triangular weir device with energy dissipation function for constructed wetland

Abstract

The utility model relates to the technical field of triangular weirs, and provides an energy dissipation and adjustable triangular weir device for a constructed wetland, the triangular weir device comprises a water inlet pipe and an open channel, the height of the water inlet pipe is lower than that of the open channel, the water outlet end of the water inlet pipe is connected with a vertically arranged energy dissipation cylinder, a spiral sheet is rotatably arranged in the energy dissipation cylinder, and the spiral sheet is connected with the open channel. The water outlet end of the energy dissipation cylinder is connected with a horizontal water outlet pipe, and an adjustable water blocking plate and an adjustable triangular weir baffle are sequentially arranged in the open channel. Through the arrangement of the energy dissipation barrel, the flow speed of water flow is reduced through the internal spiral pieces, so that the energy dissipation effect is achieved, and a certain energy dissipation effect can be achieved through the height difference; meanwhile, the height of the adjustable water blocking plate and the adjustable triangular weir baffle can be adjusted according to the water level, so that the measurement precision is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of triangular weirs, and more specifically, relates to an energy-dissipating and adjustable triangular weir device for artificial wetlands. Background Art

[0002] To improve the water quality of receiving water bodies, tailwater from urban sewage treatment plants requires advanced treatment, primarily to remove nitrogen, phosphorus, and low-concentration organic pollutants. Constructed wetlands offer numerous advantages in this regard, including low investment, maintenance, and operating costs, streamlined management, effective treatment, minimal secondary pollution, and strong resistance to shock loads. Currently, electromagnetic flowmeters are commonly used to measure sewage flow in domestic constructed wetlands. However, these methods are limited by high price tags, complex installation and commissioning, susceptibility to external electromagnetic interference, and high maintenance costs.

[0003] A triangular weir is a type of weir flowmeter. It can measure flow in open channels. Its principle is to install a weir in the channel. The water flow is blocked by the weir plate, raising the water level and causing it to flow over the weir plate. By measuring the water level above the plate, the flow rate can be calculated, as this level has a certain relationship with the flow rate. Due to its simple structure, low cost, and easy installation, it is widely used in industries such as water treatment. However, when measuring rapid sewage flow, it often suffers from inaccurate measurements due to short-circuiting, necessitating the need to dissipate energy from the pipe water. Utility Model Content

[0004] In response to the technical problem in the above-mentioned prior art that the pipeline water flow is not energy-dissipated, resulting in short-flow phenomenon in the triangular weir and causing inaccurate measurement, the purpose of the embodiment of the present application is to provide an energy-dissipating and adjustable triangular weir device for artificial wetlands, which can effectively dissipate the pipeline water flow and adjust the water volume to ensure measurement accuracy.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide an energy dissipation and adjustable triangular weir device for artificial wetlands, including: an inlet pipe and an open channel, the height of the inlet pipe is lower than the height of the open channel, the outlet end of the inlet pipe is connected to a vertically arranged energy dissipation cylinder, a spiral blade is provided for rotation in the energy dissipation cylinder, the outlet end of the energy dissipation cylinder is connected to a horizontal outlet pipe, and an adjustable water retaining plate and an adjustable triangular weir baffle are provided in sequence in the open channel.

[0006] In one embodiment, the spiral sheet includes a small-diameter spiral segment and a large-diameter spiral segment, and the small-diameter spiral segment is arranged close to the water inlet pipe.

[0007] In one embodiment, both ends of the energy dissipation cylinder are connected to the water inlet pipe and the horizontal water outlet pipe respectively through 90° elbow joints.

[0008] In one embodiment, at least two orifice plates are spaced apart in the water inlet pipe.

[0009] In one embodiment, a trumpet-shaped hole is opened at the center of the orifice plate, and the diameter of the water inlet end of the trumpet-shaped hole is smaller than the diameter of the water outlet end.

[0010] In one embodiment, a slide groove is provided on the open channel for sealing and sliding installation of the adjustable water retaining plate and the adjustable triangular weir baffle.

[0011] The beneficial effects of the energy dissipation and adjustable triangular weir device for artificial wetlands provided in the present application are: through the setting of the energy dissipation cylinder, the internal spiral blades are used to reduce the flow rate of the water flow to play an energy dissipation role, and thus the height difference can also play a certain energy dissipation role; at the same time, the adjustable water retaining plate and the adjustable triangular weir baffle can be adjusted in height according to the water level to ensure measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] Figure 1 A simplified schematic diagram of the main structure of a triangular weir device with energy dissipation and adjustable for an artificial wetland provided in an embodiment of the present application;

[0014] Figure 2 A schematic structural diagram of an adjustable triangular weir baffle in a triangular weir device with energy dissipation and adjustable function for a constructed wetland provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of the longitudinal cross-sectional structure of a perforated plate in a triangular weir device with energy dissipation and adjustable for an artificial wetland provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of a radial cross-sectional structure of a perforated plate in a triangular weir device with energy dissipation and adjustable properties for an artificial wetland provided in an embodiment of the present application;

[0017] Figure 5 This is a schematic diagram of the transverse cross-sectional structure of an open channel in a triangular weir device with energy dissipation and adjustable for artificial wetlands provided in an embodiment of the present application.

[0018] Among them, the reference numerals in the figures are:

[0019] 1. Water inlet pipe; 2. Open channel; 3. Energy dissipation cylinder; 4. Small-diameter spiral segment; 5. Large-diameter spiral segment; 6. 90° elbow joint; 7. Orifice plate; 71. Trumpet-shaped hole; 8. Horizontal water outlet pipe; 9. Adjustable water retaining plate; 10. Adjustable triangular weir baffle; 11. Chute. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0021] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0024] like Figure 1-Figure 5As shown, an energy dissipation and adjustable triangular weir device for artificial wetlands provided in an embodiment of the present application is now described. The energy dissipation and adjustable triangular weir device for artificial wetlands comprises: an inlet pipe 1 and an open channel 2, wherein the height of the inlet pipe 1 is lower than that of the open channel 2, and the outlet end of the inlet pipe 1 is connected to a vertically arranged energy dissipation cylinder 3, and the water flows from low to high, which will dissipate energy; a spiral blade is provided for rotation in the energy dissipation cylinder 3, and the outlet end of the energy dissipation cylinder 3 is connected to a horizontal outlet pipe 8, and an adjustable water retaining plate 9 and an adjustable triangular weir baffle 10 are sequentially provided in the open channel 2, and the adjustable water retaining plate 9 is arranged close to the horizontal outlet pipe 8. Specifically, the energy dissipation cylinder 3 is a T-shaped cylinder structure, and the spiral piece includes a small-diameter spiral segment 4 and a large-diameter spiral segment 5. The small-diameter spiral segment 4 is arranged close to the water inlet pipe 1. The design of the spiral structure changes the direction of the water flow and the cross-sectional area of ​​the water flow changes from small to large, which slows down the water flow rate and achieves energy dissipation; the two ends of the energy dissipation cylinder 3 are respectively connected to the water inlet pipe 1 and the horizontal water outlet pipe 8 through a 90° elbow joint 6.

[0025] To further dissipate energy, at least two orifice plates 7 are spaced apart within the water inlet pipe 1. When water flows through the orifice plates 7, the cross-section of the water flow changes suddenly, and the local cross-section shrinks to achieve the purpose of energy dissipation. Specifically, a trumpet-shaped hole 71 is formed in the center of the orifice plate 7. The diameter of the trumpet-shaped hole 71 at the water inlet end is smaller than the diameter at the water outlet end.

[0026] To accommodate varying water volumes, open channel 2 is equipped with a chute 11 for the sealed, sliding installation of an adjustable water retaining plate 9 and an adjustable triangular weir baffle 10. The adjustable water retaining plate 9 and the adjustable triangular weir baffle 10 are elevated above the height of open channel 2 and partially penetrate into the hardened, waterproof soil beneath the bottom of open channel 2. This allows for height adjustment. A U-shaped sealing strip provides a sliding seal between the adjustable water retaining plate 9 and the triangular weir baffle 10 and the chute 11. The adjustable water retaining plate 9 and the adjustable triangular weir baffle 10 also provide a sliding seal with the bottom of open channel 2. When water volumes are high, the adjustable water retaining plate 9 and the adjustable triangular weir baffle 10 can be raised, ensuring that the water flowing through the weir maintains an ideal free-flow metering state, creating precise measurement conditions. When the adjustable triangular weir baffle 10 is raised, the adjustable water retaining plate 9 blocks the flow in open channel 2, forcing it to pass through the triangular weir before it can be measured.

[0027] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An energy dissipating and adjustable triangular weir device for artificial wetlands, comprising: The invention relates to a water inlet pipe (1) and an open channel (2), characterized in that the height of the water inlet pipe (1) is lower than the height of the open channel (2), the water outlet end of the water inlet pipe (1) is connected to a vertically arranged energy dissipation cylinder (3), a spiral blade is rotatably provided in the energy dissipation cylinder (3), the water outlet end of the energy dissipation cylinder (3) is connected to a horizontal water outlet pipe (8), and an adjustable water retaining plate (9) and an adjustable triangular weir baffle (10) are sequentially provided in the open channel (2).

2. The energy dissipating and adjustable triangular weir device for artificial wetlands according to claim 1, characterized in that: The spiral sheet comprises a small-diameter spiral segment (4) and a large-diameter spiral segment (5), and the small-diameter spiral segment (4) is arranged close to the water inlet pipe (1).

3. The energy dissipating and adjustable triangular weir device for artificial wetlands according to claim 2, characterized in that: Both ends of the energy dissipation cylinder (3) are connected to the water inlet pipe (1) and the horizontal water outlet pipe (8) respectively through 90° elbow joints (6).

4. The energy dissipating and adjustable triangular weir device for artificial wetlands according to claim 1, characterized in that: At least two orifice plates (7) are spaced apart in the water inlet pipe (1).

5. The energy dissipating and adjustable triangular weir device for artificial wetlands according to claim 4, characterized in that: A trumpet-shaped hole (71) is provided at the center of the orifice plate (7), and the diameter of the water inlet end of the trumpet-shaped hole (71) is smaller than the diameter of the water outlet end.

6. The energy dissipating and adjustable triangular weir device for artificial wetlands according to any one of claims 1 to 5, characterized in that: The open channel (2) is provided with a chute (11) for slidingly installing the adjustable water retaining plate (9) and the adjustable triangular weir baffle (10).

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