A vertically movable submersible flow device
The vertical submersible propulsion device with liftability solves the problems of complex structure, poor adaptability and high energy consumption in the existing technology, and realizes sewage treatment with uniform flow and high efficiency, which can adapt to different pool shapes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG CHUNJIANG ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-26
AI Technical Summary
Existing submersible jet propellers have complex structures, fixed installation heights, poor adaptability, high energy consumption, and are difficult to adapt to pools of different shapes. They also have problems such as dead flow zones and uneven packing.
It adopts a liftable vertical submersible propulsion device, which generates axial water flow by driving the impeller with a motor. Combined with the lifting frame and hoisting device, the impeller height can be adjusted to adapt to different water depths and filler concentrations, avoid dead zones in the flow, and is suitable for circular or square pools.
It improves the uniformity of packing suspension, reduces dead zones in flow, increases biofilm formation rate and treatment efficiency, reduces energy consumption, and simplifies the structure to reduce maintenance costs.
Smart Images
Figure CN224404917U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of submersible flow devices for sewage treatment, specifically to a liftable vertical submersible flow propulsion device. Background Technology
[0002] Currently, wastewater treatment often uses moving bed biofilm reactor (MBBR) systems. These systems require a flow-promoting device to facilitate the flow of wastewater in the tank so that it can continuously mix and react with the biochemical packing material.
[0003] Most existing submersible flow promoters are sidewall-type, and their main disadvantages include: First, the water flow direction is unidirectional, which can easily lead to uneven fluidization of the packing material and affect the biofilm formation efficiency; Second, the installation height is fixed and cannot be flexibly adjusted according to changes in water quality or packing material concentration, resulting in poor adaptability and dead flow corners within the pool; Third, the energy density is high (i.e., high energy consumption per unit volume), leading to high operating costs; Fourth, because they are installed on the sidewall, they are difficult to adapt to circular pools.
[0004] Chinese utility model patent CN211562604U discloses a submersible hyperboloid mixing device. It adjusts the height of the connecting rod and counterweight, and the opening angle of the support rod, thereby adjusting the height of the mixing mechanism to meet the optimal height requirements of different wastewater tanks. This disclosed technology achieves vertical installation of the submersible impeller, and the impeller height is adjustable. However, its adjustment component suffers from an overly complex structure, including a sliding sleeve and a connecting block fixedly connected to the outside of the sleeve. The sleeve is slidably connected to the support rod, and the sleeve is equipped with positioning bolts. The support rod has multiple sets of screw holes at equal intervals to match the positioning bolts, etc. These complex components operate in wastewater for extended periods, making effective lubrication difficult. Severe wear between components and inconsistent fit are difficult to guarantee, inevitably increasing operation and maintenance costs. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a vertical submersible propulsion device that can be raised and lowered, so as to realize the vertical installation and height adjustment of the submersible propulsion device through a simple and stable mechanical mechanism.
[0006] The following is the technical solution of this utility model:
[0007] A liftable vertical submersible propulsion device includes a propulsion unit for installation inside a sewage treatment tank and fixed to a mounting frame. The propulsion unit includes a motor with a longitudinally arranged power output shaft and an impeller driven by the motor. The impeller shaft is longitudinally arranged and located below the power output shaft, and blades are installed on the impeller shaft. An operating platform is installed at the upper port of the sewage treatment tank. The submersible propulsion device also includes a lifting frame installed inside the sewage treatment tank. The lifting frame includes two longitudinally arranged guide columns. The lower ends of the two guide columns are fixed to the bottom of the sewage treatment tank, and the upper ends are connected to each other by a horizontally oriented cross plate. The two guide columns are located on one side of the operating platform and are connected to the operating platform by a fastener, with a gap between the two guide columns and the operating platform. A sliding sleeve is installed on each of the left and right sides of the mounting frame, and the sliding sleeve slides up and down on the guide column on its respective side. A lifting device for lifting the mounting frame is installed on the cross plate.
[0008] Preferably, the propeller is mounted on the mounting frame via a connecting frame; the lifting device is an electric hoist; the traction rope of the electric hoist passes through a longitudinal through hole opened on the horizontal plate and is hooked to the connecting frame.
[0009] Preferably, a protective rod extending downwards is fixedly installed on the mounting bracket; the lower end of the protective rod is lower than the lower end of the impeller.
[0010] Preferably, the blades are two- or three-bladed helical blades; the blade curvature is passivated, and the rounded corner radius R ≥ 20 mm.
[0011] Preferably, the blade material is polyurethane or nylon with a density ≤1.2g / cm³ and a blade pitch ratio of 1:1.8~1:2.2.
[0012] Compared with the prior art, the present invention has the following advantages:
[0013] First, during operation, the motor drives the impeller to rotate, generating axial water flow perpendicular to the horizontal plane. This creates a circulation of upward and downward flow, forming a three-dimensional circulation within the tank, avoiding dead zones and more effectively promoting uniform fluidization of the packing material. By adjusting the impeller height, it can adapt to different water depths or packing material concentration requirements. Actual operation shows that using this invention (compared to the sidewall type), the uniformity of packing material suspension is increased by 40%, the dead zone area is reduced by 90%, the biofilm attachment rate is increased by 25%, and the wastewater treatment efficiency is increased by 12%-15%. The energy consumption per unit volume of this invention is 13-15W / m³ (compared to 20-30W / m³ for traditional flow promoters), and the packing material breakage rate is ≤1%.
[0014] Secondly, the lifting frame of this utility model is installed at the bottom of the pool, eliminating the need to drill holes in the pool wall, and can be adapted to round or square pools.
[0015] Third, this utility model also has the outstanding features of simple structure and convenient maintenance. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0017] Figure 2 This is a schematic diagram of the mounting frame and the flow generator in an embodiment of this utility model.
[0018] In the diagram: 1. Sewage treatment tank; 2. Operating platform; 3. Guide column; 4. Horizontal plate; 5. Lifting device; 6. Traction rope; 7. Mounting frame; 7-1. Sliding sleeve; 8. Flow generator; 8-1. Blade; 9. Protective rod; 10. Connecting frame. Detailed Implementation
[0019] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.
[0020] like Figure 1 and Figure 2 An embodiment of this utility model includes a flow promoter 8 for installation inside a sewage treatment tank 1 and fixed to a mounting frame 7. The flow promoter 8 is mounted on the mounting frame 7 via a connecting frame 10.
[0021] The impeller 8 includes a motor with a power output shaft arranged longitudinally (perpendicular to the horizontal plane) and an impeller drivenly connected to the motor. The power output shaft is connected to the impeller shaft of the impeller via a coupling. The impeller shaft is arranged longitudinally and located below the power output shaft, and blades 8-1 are mounted on the impeller shaft. The impeller shaft is directly connected to the motor to simplify the transmission components and reduce transmission losses.
[0022] The motor features a waterproof and sealed design, with a power range of 1.5kW to 15kW, and is equipped with a frequency converter to achieve stepless speed regulation from 0 to 100rpm. The motor speed is generally controlled below 100rpm to reduce the risk of MBBR packing breakage.
[0023] The blades 8-1 typically employ two or three helical blades with a twisted design to enhance axial thrust. The blade curvature is passivated (corner radius R ≥ 20 mm) to further reduce the risk of MBBR packing breakage.
[0024] Specifically, the blade 8-1 is made of polyurethane or nylon with a density ≤1.2g / cm³ and a blade pitch ratio of 1:1.8~1:2.2.
[0025] The embodiments of this utility model also include an operating platform 2 fixed at the upper port of the sewage treatment tank 1, and protective railings are installed on the front and rear sides of the operating platform 2 (the protective railings are omitted in the attached drawings).
[0026] The embodiments of this utility model also include a lifting frame installed inside the sewage treatment tank 1. The lifting frame includes two longitudinally arranged guide columns 3. The lower ends of the two guide columns 3 are fixed by embedded parts in the bottom of the tank, and the upper ends are connected to each other by a horizontally oriented cross plate 4. The two guide columns 3 are located on one side of the operating platform 2 and are connected to the operating platform 2 by fasteners, with a gap between the two guide columns 3 and the operating platform 2.
[0027] The guide column 3 is made of high-strength stainless steel and has been treated with anti-corrosion coating to adapt to the sewage environment.
[0028] like Figure 2 A sliding sleeve 7-1 is installed on each of the left and right sides of the mounting bracket 7. The sliding sleeve 7-1 can be slidably sleeved on the guide post 3 on the corresponding side.
[0029] Furthermore, a downward-extending protective rod 9 is also fixedly installed on the mounting bracket 7. The lower end of the protective rod 9 is lower than the lower end of the impeller. When the impeller 8 is in its lowest position, the lower end of the protective rod 9 contacts and limits contact with the bottom of the pool to prevent the impeller shaft from contacting the bottom of the pool.
[0030] A lifting device 5 for lifting and lowering the mounting frame 7 is installed on the horizontal plate 4. Specifically, the lifting device 5 is an electric hoist installed on the upper side of the horizontal plate 4. The traction rope 6 of the electric hoist passes through a longitudinal through hole opened on the horizontal plate 4 and is hooked to the connecting frame 10.
[0031] In this embodiment, the height of the thruster 8 is adjusted by controlling the lifting device 5 to pull the mounting frame 7 to move up and down along the guide column 3.
[0032] Examples of wastewater treatment tanks to which this utility model is applicable are as follows:
[0033] (a) Circular pool:
[0034] The pool has a diameter of 6m and a depth of 4m, and is equipped with one flow promoter; the impeller has a diameter of 1.8m, a rotation speed of 80rpm, and an initial immersion depth of 2.5m; the packing material is type K1 (diameter 25mm), with a suspension rate ≥98% and a breakage rate of 0.5%.
[0035] (ii) Square pool:
[0036] The pool measures 5m × 5m × 6m and is equipped with one impeller; the impeller diameter is 1.8m, the rotation speed is 90rpm, and the initial immersion depth is 3m; the packing material is K3 type (diameter 35mm), with a suspension rate ≥97% and a breakage rate of 0.5%.
Claims
1. A liftable vertical submersible propulsion device, comprising a propulsion device (8) for installation inside a sewage treatment tank (1) and fixed on a mounting frame (7), the propulsion device (8) comprising a motor with a power output shaft arranged longitudinally and an impeller connected to the motor for transmission, the impeller shaft of the impeller being arranged longitudinally and located below the power output shaft, blades (8-1) being mounted on the impeller shaft, and an operating platform (2) being installed at the upper port of the sewage treatment tank (1), characterized in that: The submersible propulsion device also includes a lifting frame installed in the sewage treatment tank (1). The lifting frame includes two longitudinally arranged guide columns (3). The lower ends of the two guide columns (3) are fixed to the bottom of the sewage treatment tank (1), and the upper ends are connected to each other through a horizontally oriented horizontal plate (4). The two guide columns (3) are located on one side of the operating platform (2) and are connected to the operating platform (2) through fasteners. There is a gap between the two guide columns (3) and the operating platform (2). A sliding sleeve (7-1) is installed on the left and right sides of the mounting frame (7). The sliding sleeve (7-1) slides up and down on the guide column (3) on its side. A lifting device (5) for pulling the mounting frame (7) up and down is installed on the horizontal plate (4).
2. The vertically adjustable submersible propulsion device as described in claim 1, characterized in that: The propeller (8) is mounted on the mounting frame (7) via the connecting frame (10); the lifting device (5) is an electric hoist; the traction rope (6) of the electric hoist passes through the longitudinal through hole opened on the horizontal plate (4) and is hooked to the connecting frame (10).
3. The vertically adjustable submersible propulsion device as described in claim 1, characterized in that: A protective rod (9) extending downwards is fixedly installed on the mounting bracket (7); the lower end of the protective rod (9) is lower than the lower end of the impeller.
4. The vertically adjustable submersible propulsion device as described in claim 1, 2, or 3, characterized in that: The blade (8-1) is a two- or three-bladed helical blade; the blade curvature is passivated and the radius of the rounded corner R is ≥20mm.
5. The vertically adjustable submersible propulsion device as described in claim 1, 2, or 3, characterized in that: The blade (8-1) is made of polyurethane or nylon with a density ≤1.2g / cm³ and a blade pitch ratio of 1:1.8~1:2.2.