Patent Grant
11118586
This application is a national stage application of International application number PCT/CN2018/078794, filed Mar. 13, 2018, titled “BAILER-TYPE LONG-SHAFT PUMP AND APPLICATION THEREOF,” which is hereby incorporated by reference in its entirety.
The invention relates to the technical field of hydraulic engineering in general, and in particular to a bailer-type long-shaft pump and a pump station using the bailer-type long-shaft pump.
Pumping stations are common hydraulic constructions in hydraulic engineering and water conservancy projects. They are generally located at the junction of an inland river and an outer river in cities and towns; or on inland river dams in low-lying areas in rural areas. They are used to eliminate waterlogged water or to irrigate farmland. At present, horizontal pumps, such as vertical shaft cross-flow pumps and plane S-shaped shaft extension pumps, are the commonly used form of pumps in large-flow pumping stations. The pumping stations using the horizontal pumps have a low efficiency in general due to the relatively high ratio of the flow channel loss to the total head of the water pump, The pumping stations using the horizontal pumps also require dedicated main and auxiliary workshops and maintenance rooms. At the same time, the height of the pump room is also high, the construction period of the pump room is long, and the total investment of the pumping station is high.
An objective of the present invention is to provide a large-flow, low-lift bailer-type long-shaft pump, which solves the problems of high cost and low efficiency of the large flow pumps used in the existing pumping stations, and brings along further advantages of simple structure, low cost, and easy installation.
The present invention further provides bailer-type long-shaft pumping station, which eliminates the requirement for main workshops, auxiliary workshops, and maintenance rooms. There will be no need for a pumping room above the ground, which reduces space requirement, shortens the construction period of the pumping station, and greatly reduces investment and operating costs for the pumping station.
In order to achieve the above results, the following technical solutions are adopted and disclosed as part of the present invention.
A bailer-type long-shaft pump, comprising: a plurality of bailer vehicles, a long shaft, a bearing, a transmission device, and an electric motor; wherein the transmission device comprises a planetary gearbox, an orthogonal shaft gearbox and a frequency converter, wherein one end of the long shaft successively passes through the bearing, the planetary gearbox, the orthogonal shaft gearbox and the frequency converter, so as to be in transmission connection with a drive shaft of the electric motor, wherein the bailer vehicle is provided with a cylindrical base configured to encase the long shaft and has at least three blades, wherein the blades are distributed on the surface of the cylindrical base in an annular array radially extending from the center of the long shaft; wherein adjacent blades and the surface of the cylindrical base enclose a space to form a bailing bucket capable of bailing water from a lower water level of a water channel to a higher water level of the water channel;
In some embodiments, each of the plurality of bailer vehicles (110) has equal numbers of blades.
In some embodiments, the blades from any two neighboring bailer vehicles are staggered and do not reside on the same plane.
A pump station using the bailer-type long-shaft pump, comprising: a pump station foundation that comprises a drainage section, a pumping section and a diversion section sequentially installed along the flow direction of the water channel, wherein the pumping section is provided with a plurality of equipment rooms distributed traversely across the water channel, wherein the equipment rooms are constructed on top of the pump station foundation and divide the pumping section into a plurality of pumping areas, wherein one end of the pumping area is a water supply end and another end of the pumping area is a water outlet end, wherein the water supply end and the water outlet end are divided with a partition, wherein at least one of the pumping areas is provided with the bailer-type long-shaft pump, wherein the long shaft of the bailer-type long-shaft pump and the bailer vehicle of the bailer-type long-shaft pump are located in the water supply end, wherein two ends of the long shaft are supported on the sidewalls between two adjacent equipment rooms, and wherein one end of the long shaft is connected to the electric motor through the transmission device in the equipment room.
In some embodiments, a recessed area is provided at part of the pump station foundation that is direct below the bailer vehicle, wherein the recessed area is arc-shaped and encompasses bottom of the bailer vehicle.
In some embodiments, the plurality of the equipment rooms are distributed at equal distance to each other.
In some embodiments, each of the pumping areas is provided with a bailer-type long-shaft pump, and the bailer-type long-shaft pumps are arrayed traversing the water channel either in a straight line or is parallel but staggered.
In some embodiments, a pedestrian bridge is provided that connects two adjacent equipment rooms.
In some embodiments, a sedimentation tank is provided near the water supply end and another sedimentation tank is provided near the water outlet end.
In some embodiments, wing walls are provided on both sides of the drainage section and the diversion section.
Compared with the prior art, the beneficial effects of the present invention are:
The bailer-type long-shaft pump of the invention has a simple structure, thus easy to manufacture. The bailer-type long-shaft pump has the benefits of large flow and low head, because water is pumped to the high water side of the river by the continuously rotating blades driven by the long shafts. By adjusting the number of bailer vehicles, the diameter and number of blades, the rotating speed of the pump, and the submergence depth of the blades according to the water channel width and water depths, a smooth and unobstructed short runner is achieved that results in effective improvement of the overall efficiency of the pump. When the head is large, the frequency converter (143) can be used to adjust the starting speed of the pump to reduce the starting torque of the pump and the output of the motor. After running of the pump stabilizes, the pump gradually returns to a predetermined speed.
In the pump station using the bailer-type long-shaft pump, a plurality of equipment rooms is distributed traversely across the water channel in the pumping section, producing a plurality of pumping areas. Within a pumping area, the bailer vehicles are installed onto the long shaft. One end of the long shaft is in transmission connection to the transmission device located inside of the equipment rooms. Thus, the pump station eliminates the requirements for main workshops, auxiliary workshops, maintenance rooms, and above-ground pumping rooms, which reduces the occupied space, shortens the construction period of the pumping station, and greatly reduces the investment and operating costs.
Still other embodiments of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein is described embodiments of the invention by way of illustrating the best mode contemplated for carrying out the invention. As will be realized, the invention is capable of other and different embodiments and its several details are capable of modifications in various obvious respects, all without departing from the spirit and the scope of the present invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive.
The invention may best be understood by referring to the following description and accompanying drawings that are used to illustrate embodiments of the invention. The invention is illustrated by ways of example in the embodiments and it not limited in the figures of the accompanying drawings, in which like references indicates similar elements
The numbers and corresponding names in the figure are:
As shown in
As shown in
The sequence of operation for the bailer-type long-shaft pump (100) and the pump station (200) disclosed in the present disclosure is as follows: the electric motor (150) is started first; after deceleration via the inverter (143), the orthogonal gear box (142), and the planetary gear box (141), the electric motor (150) drives the long shaft (120) and the long the bailer vehicles (110) to rotate; through the effects of blades (111), water that enters the diversion section (220) is lifted from the water supply end (232a) and placed in the water outlet end (232b), and flows out through the drainage section (240).
The present invention discloses a system in which the equipment rooms and the bailer-type long-shaft pump are installed at the pumping section, the transmission device and the electric motors are installed within the equipment rooms. As a result, main and auxiliary workshops and maintenance rooms are not required, and no pump room is required above the ground, which reduces space requirement, shortens the construction period of the pumping station, and reduces construction costs. The bailer-type long-shaft pump also increases ascetic appeal of the pump station. In addition, by connecting the electric motor to the transmission device comprising the planetary gearbox, the orthogonal gearbox, and the frequency converter, the disclosed design effectively reducing the starting torque and greatly increasing the reduction ratio. The disclosed design meets the needs of low speed and high torque characteristic of a bailer; meanwhile, the disclosed design also ensures the smooth operation of the pumping station and improves vibration resistance and shock resistance.
While the invention has been particularly shown and described as referenced to the embodiments thereof, those skilled in the art will understand that the foregoing and other changes in form and detail may be made therein without departing from the spirit and scope of the invention. Various changes, variation, modification and permutation of the above-mentioned concepts, without input deemed creative for those ordinary persons skilled in the art are within the protection scope of the present invention.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2018/078794 | 3/13/2018 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2019/173960 | 9/19/2019 | WO | A |
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| 0593144 | Apr 1994 | EP |
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| Number | Date | Country | |
|---|---|---|---|
| 20200240416 A1 | Jul 2020 | US |
