Rotating spherical trash rack

Abstract

The present invention discloses a rotating spherical trash rack, including a water-absorbing steel pipe, characterized in that it also includes a roller and a spherical trash rack, the roller and the spherical trash rack are connected by bolts to form a whole, a waterproof motor and a reducer are fixed on the water-absorbing steel pipe, the roller is fixed on the water-absorbing steel pipe by a sealed bearing, and is connected to the waterproof motor through a transmission gear, the waterproof motor drives the spherical trash rack to rotate through the reducer, a conical grass guide cone is embedded on the roller, the roller diameter is larger than the water-absorbing pipe diameter, the spherical trash rack diameter is at least equal to the water-absorbing pipe bell mouth diameter, and the sealed bearing is fixed by a bearing bracket. The present invention solves the troubles of the floating ship-type pumping station affecting the safety of the hull and the blockage of the water inlet pipe due to the accumulation of firewood and grass, and has an ingenious design, simple manufacture, easy installation, and simple operation.

Description

Technical Field

[0001] The invention relates to a device for removing floating objects in a river during the process of taking water from a river channel by a floating ship type pumping station. Background Art

[0002] During the process of drawing water from the river, firewood, debris, waste, floating debris and firewood in the floating boat pumping station are often accumulated on the floating bow and suction pipe, grass grate and pump chamber, affecting the safety of the hull, water flow and efficiency, and affecting normal water intake. This is especially true during the flood season, upstream rainfall, drainage of reservoirs along the Yellow River, etc., which cause the river water to rise, bringing in a large amount of firewood, and the impact is even greater.

[0003] The floating objects in the Yellow River have the following characteristics:

[0004] First, there are many types, such as domestic garbage, firewood, trees, plant roots, ice cubes, etc.

[0005] Second, they are of different shapes, sizes and strengths.

[0006] The third is three-dimensional suspension. Due to the different specific gravity of floating objects, they present two postures of floating and suspension when propelled in the river, generally suspended in three dimensions within 5 meters below the water surface.

[0007] Fourth, they become entangled with each other, forming a firewood ball. The roots of reeds growing on the beach are washed out by the water flow after the bank collapses. The reed roots with a diameter of 0.5-2.0cm are strong in tensile strength and can reach several meters or even dozens of meters in length. Under the tumbling action of the water flow, they become entangled with other debris to form an irregular firewood ball with a diameter of several meters. The firewood ball has reed roots of varying lengths extending out of it, swinging randomly. It is often just a small ball on the water surface, but the underwater part is very large.

[0008] The impact of floating objects on pumping stations is roughly as follows:

[0009] First, the accumulation of floating objects on the bow and hull connection parts endangers the safety of floating ships. The accumulation of floating objects increases the resistance of the hull, and the support parts between the hull and the shore, the shore anchors and the steel cables are damaged due to increased stress, and the risk of overload and breakage increases.

[0010] The second is the impact on the water suction pipe. The impact of heavy objects and excessive accumulation of floating objects increase the force on the water suction pipe, which may cause the water suction pipe and the connection parts to deform and leak, and it is impossible to form a vacuum and pump water.

[0011] Third, due to the suction of the pipeline, floating objects accumulate on the grass grate at the bell mouth of the suction pipe, reducing the water flow area of ​​the bell mouth and causing the water pump outflow to gradually decay. In severe cases, the bell mouth is even blocked, resulting in flow interruption and affecting normal water intake.

[0012] Fourth, the impact on the water pump. When debris enters the water pump, soft debris will block the impeller; hard debris will cause damage to the impeller and pump body, increase cavitation, and affect the efficiency and service life of the water pump.

[0013] Therefore, timely and thorough cleaning of the deposits on the suction pipe and grass grates is a prerequisite for ensuring the safe operation of the water pump and is also one of the means to give full play to the working efficiency of the water pump.

[0014] For the problem of firewood accumulation, the general existing technology is to use high-pressure water guns and homemade tools such as rakes, sickles, hooks, forks, etc. to remove it by manual weeding. Because the tools are heavy and the site is limited, the efficiency is low, the effect is poor, and the risk is high. When the grass-blocking grate 4 of the bell mouth 7 is blocked, the firewood is tightly adsorbed on the grass-blocking grate 4, and it is impossible to remove it manually. The only way is to shut down the machine and use the pipeline water to backflow to flush away the accumulated grass. In case of serious floating objects in the river, only frequent startup and shutdown can barely maintain the operation of the entire system, which brings great problems to terminal metering and charging.

[0015] The present invention only discusses the situation and countermeasures of firewood accumulation in the water suction pipe and the bell-mouth grass-blocking grate affecting water intake.

[0016] 1. Accumulation in the water suction pipe

[0017] When firewood touches the suction pipe, it is balanced on both sides and adheres to the water-facing surface and both sides of the pipe under the action of water pressure. Because it adheres to the pipe, the friction increases, and the impact force of the water flow is not enough to offset the friction, so it accumulates on the water-facing surface and both sides of the suction pipe. Figure 1 .

[0018] The weeds accumulate because of the balanced force, and accumulate more and more because of the strong friction. As long as the force balance on the water-facing surface of the suction pipe is broken, the weeds can be washed away by the water flow. Therefore, the key to weeding in the suction pipe is to break the force balance.

[0019] 2. Accumulation of bell-shaped grass grates

[0020] When firewood is drifting in the river, it is gradually sucked into the bell mouth under the action of the suction force of the bell mouth. In particular, the reed roots extending out of the firewood ball pull the entire firewood ball to the bell mouth of the suction pipe while being sucked in, and are blocked at the bell mouth by the grass grate. As the firewood accumulates more and more, the water flow area of ​​the grass grate becomes smaller and smaller, and the water flow speed passing through the grass grate becomes faster and faster. The suction force of the bell mouth increases accordingly, and more firewood is adsorbed on the grass grate until it is blocked. Figure 2 .

[0021] The accumulated grass here is more than 2 meters deep under water, and has a strong adsorption force, so it is not easy to remove it directly. Therefore, it is more feasible to guide the firewood away from the bell mouth before it reaches the bell mouth.

[0022] It is a simple, economical, effective and feasible method to modify the bell mouth of the suction pipe and install a rotating spherical trash rack. Summary of the invention

[0023] The purpose of the present invention is to provide a rotating spherical trash rack, which solves the problem that firewood and straw accumulation in floating ship-type pumping stations affect the safety of the hull and the water inlet pipe is blocked. The invention has an ingenious design, is simple to make, easy to install and easy to operate.

[0024] The technical solution of the present invention is: a rotating spherical trash rack, including a water absorption steel pipe, characterized in that it also includes a roller and a spherical trash rack, the roller and the spherical trash rack are connected with bolts to form a whole, a waterproof motor and a reducer are fixed on the water absorption steel pipe, the roller is fixed on the water absorption steel pipe with a sealed bearing, and is connected to the waterproof motor through a transmission gear, the waterproof motor drives the spherical trash rack to rotate through the reducer, a conical grass guide cone is embedded on the roller, the diameter of the roller is larger than the diameter of the water absorption pipe, the minimum diameter of the spherical trash rack is equal to the diameter of the bell mouth of the water absorption pipe, and the sealed bearing is fixed by a bearing bracket.

[0025] A rotating spherical trash rack is characterized in that both the drum and the spherical trash rack are made of corrosion-resistant, high-strength and light materials.

[0026] A rotary spherical trash rack is characterized in that the sealed bearings connecting the drum and the water suction pipe and the bearings of the transmission gear adopt rubber sealed bearings, and the gears of the transmission gear adopt wear-resistant non-lubricating gears.

[0027] A rotary spherical trash rack is characterized by having two upper and lower bearing brackets.

[0028] The present invention is characterized as follows:

[0029] (1) Safe, reliable, easy to use, and easily solves the firewood problem that has plagued us for many years.

[0030] (2) Integral assembly, easy to install, inspect and maintain.

[0031] (3) Simple structure, low cost and easy maintenance.

[0032] (4) The direction and speed of rotation can be selected independently, and intelligent operation can also be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the principle of accumulation of floating objects in the water suction pipe.

[0034] Figure 2 It is a schematic diagram of the principle of accumulation of floating objects on the bell-shaped grass grate.

[0035] Figure 3 It is a schematic diagram of the structure of the rotating spherical trash rack of the present invention.

[0036] Figure 4 It is a schematic diagram of the installation process of the rotating spherical trash rack and the water suction pipe of the present invention.

[0037] Description of the accompanying drawings: sealed bearing 1, bearing bracket 2, grass guide cone 3, grass blocking grate 4, transmission gear 5, roller 6, bell mouth 7, reducer 8, waterproof motor 9, spherical trash rack 10, bolt 11. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 3 As shown, a rotating spherical trash rack of the present invention is composed of a roller 6 and a spherical trash rack 10. The roller 6 and the spherical trash rack 10 are connected to form a whole by bolts 11. The roller 6 is fixed to the water absorption steel pipe by a sealed bearing 1 and is connected to a waterproof motor 9 through a transmission gear 5. The waterproof motor 9 drives the spherical trash rack 10 to rotate through a reducer 8. A conical grass guide cone 3 is embedded on the roller 6. The diameter of the roller 6 is larger than the diameter of the water absorption pipe. The minimum diameter of the spherical trash rack 10 is equal to the diameter of the water absorption pipe bell mouth 7. The sealed bearing 1 is fixed by a bearing bracket 2.

[0040] Principle of the Invention

[0041] The rotating spherical trash rack of the present invention can rotate clockwise or counterclockwise under the drive of the waterproof motor 9, and the conical grass guide cone 3 on the drum 6 can better carry the accumulated grass attached to the drum to the back water surface. When the accumulated grass on the front water surface is transferred to the back water surface, the attachment balance is broken, the accumulated grass loses its adhesion, and under the action of the water flow, it will be easily carried downstream.

[0042] Since the diameter of the spherical trash rack 10 is larger than the bell mouth 7, the velocity of the water flow passing through the surface of the spherical trash rack 10 is significantly reduced, and the adsorption force of the suction water flow on the grass on the surface of the spherical trash rack 10 is correspondingly reduced. When the velocity is lower than the velocity of the river water flow, as the spherical trash rack rotates, the accumulated grass is carried to the back water surface, the adhesion balance is broken, the adhesion force is reduced, and the accumulated grass is carried downstream under the action of the water flow.

[0043] Feasibility calculation

[0044] According to the zero-stage station water pump parameters, the design flow rate Q 泵 =1.46m 3 / s, suction pipe diameter D 管=1m, bell mouth diameter D 喇 =1.4m. Then:

[0045] Suction pipe flow rate V 管 =Q 泵 / π(D 管 / 2) 2 =1.86m / s

[0046] Bell mouth water velocity V 喇 =Q 泵 / π(D 喇 / 2) 2 =0.95m / s

[0047] After actual measurement, the river water velocity at the suction pipe on the north side of the floating ship (V 河 )as follows:

[0048] Zero-level station floating ship north side water flow meter

[0049]

[0050] According to the measurement, when the equipment is not turned on, the bell mouth 7 of the suction pipe is 1.25m below the water surface; when all the equipment on board is turned on, the bell mouth 7 is located at 1.45m below the water surface. After the rotating spherical trash rack of the present invention is installed, the bottom of the spherical trash rack 10 is located at 1.95m and 2.15m below the water surface in these two cases respectively (the diameter of the spherical trash rack D 球 =1.4m). Because the water flow velocity V at the bell mouth of the suction pipe 喇 Greater than the river flow velocity V 河 , the river water cannot carry the firewood to leave the bell mouth 7, and the firewood near the bell mouth 7 is just adsorbed on the grass-blocking grate 4 of the bell mouth, and accumulates and blocks the water suction pipe bell mouth.

[0051] The rotating spherical trash rack of the present invention is installed on the suction pipe, and the minimum diameter of the spherical trash rack 10 is the diameter of the bell mouth (D 球 =D 喇 =1.4m), otherwise it cannot be installed. When the diameter of the spherical trash rack 10 is equal to the diameter of the bell mouth, only half of the area of ​​the spherical trash rack 10 flows through water. At this time, the water flow velocity passing through the surface of the spherical trash rack 10 is:

[0052] V 球 =Q 泵 / (1 / 2) πD 球 2 =0.47m / s

[0053] Conclusion: V 管 >V 喇 >V 河 >V 球

[0054] It can be seen that the water flow speed passing through the surface of the spherical trash rack 10 is lower than the river flow speed. As the spherical trash rack 10 rotates, when the firewood adsorbed on the water-facing surface turns to the water-repellent surface, it will be washed away by the water flow. Moreover, the larger the diameter of the spherical trash rack 10, the smaller the water flow speed passing through the surface of the spherical trash rack 10, and the easier it is to be washed away by the water flow, and the more obvious the effect.

[0055] The spherical trash rack 10 is equivalent to significantly increasing the area of ​​the grass-blocking grate 4 of the trumpet mouth 7, and transferring the grass-blocking position from the rapids area to the slow-flow area. When the spherical trash rack 10 rotates, the intercepted firewood is continuously washed away by the river water, ensuring that the spherical trash rack 10 works continuously.

[0056] The drum 6 and the spherical trash rack 10 are both made of corrosion-resistant, high-strength, lightweight materials, such as aluminum alloy, which will not add excessive load to the original water suction pipe due to the addition of new devices, threatening the safety of the original equipment, and at the same time have the impact strength to resist water flow and firewood attachment.

[0057] Because the working conditions are poor in a river with high sand content and more weeds, the sealed bearing 1 connecting the drum 6 with the suction pipe and the bearing of the transmission gear 5 should use sealed, wear-resistant and pressure-resistant bearings, such as rubber sealed bearings. The transmission gear 5 also uses a new type of wear-resistant non-lubricated gear.

[0058] The minimum diameter of the spherical trash rack 10 is the diameter of the trumpet mouth. According to the on-site conditions, the larger the diameter, the better the grass blocking effect.

[0059] A 3 kW asynchronous low-speed waterproof motor 9 is used in conjunction with a reducer 8.

[0060] Working mode: Mechanical shaft transmission, the waterproof motor 9 drives the spherical trash rack 10 to rotate through the reducer 8.

[0061] First remove the suction pipe, and then install it into a whole according to the order of components, such as Figure 4 , and finally install the whole unit in the original position and connect the power control device.

[0062] After the equipment is installed and debugged, it can be remotely operated in the pump control room.

[0063] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A rotating spherical trash rack, comprising a water-absorbing steel pipe, characterized in that The invention also comprises a roller (6) and a spherical trash rack (10), wherein the roller (6) and the spherical trash rack (10) are connected to form a whole by bolts (11), a waterproof motor (9) and a reducer (8) are fixed to the water absorption steel pipe, the roller (6) is fixed to the water absorption steel pipe by a sealed bearing (1), and is connected to the waterproof motor (9) through a transmission gear (5), the waterproof motor (9) drives the spherical trash rack (10) to rotate through the reducer (8), a conical grass guide cone (3) is embedded on the roller (6), the diameter of the roller (6) is larger than the diameter of the water absorption pipe, the diameter of the spherical trash rack (10) is at least equal to the diameter of the bell mouth (7) of the water absorption pipe, and the sealed bearing (1) is fixed by a bearing bracket (2).

2. The rotating spherical trash rack according to claim 1, characterized in that The roller (6) and the spherical trash rack (10) are both made of corrosion-resistant, high-strength, lightweight materials.

3. The rotating spherical trash rack according to claim 1, characterized in that The sealed bearing (1) and the bearing of the transmission gear (5) connected between the roller (6) and the water suction pipe adopt rubber sealed bearings, and the gear of the transmission gear (5) adopts wear-resistant non-lubricated gears.

4. The rotating spherical trash rack according to claim 1, characterized in that The bearing bracket (2) has two upper and lower ones.

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