Hydroelectric generator installed in pipeline

Abstract

The utility model relates to a hydroelectric generator installed in a pipeline. The hydroelectric generator installed in the pipeline comprises a river channel with an inclined section and a horizontal section and further comprises the pipeline obliquely fixed to the inclined section of the river channel, a spiral impeller is installed in the pipeline, and the end, close to the horizontal section of the river channel, of a spiral shaft of the spiral impeller is connected with a generator through a universal coupling. The generator is horizontally installed on the horizontal section of the river channel. The power generator and the screw shaft are connected through the universal coupling, the universal coupling has large angular compensation capacity, even if the screw shaft and the rotor rotating shaft of the power generator are not located on the same axis, continuous rotation of the connected screw shaft and the rotor rotating shaft of the power generator can be achieved under the condition that the axis included angle exists; and torque and motion are reliably transmitted, so that the generator is horizontally mounted, and the problems that vibration exceeds the standard and the service life is shortened due to inclined mounting are solved.

Description

Technical Field

[0001] The present application relates to the technical field of hydroelectric generators, and in particular to a hydroelectric generator installed in a pipeline. Background Art

[0002] Generally speaking, small hydroelectric generators offer significant potential as an alternative energy source for applications such as agricultural reservoirs, irrigation ponds, sewage treatment plants, aquaculture drainage channels, multi-purpose dam spillways, and small rivers. Furthermore, they are easy to install and operate even in mountainous areas, remote regions, and isolated islands where electricity is difficult to access. Furthermore, they offer relatively high returns when the water flow is constant, leading to extensive research and development efforts in small hydroelectric generators.

[0003] Chinese patent number CN205503346U discloses a spiral blade low-head hydroelectric generator set, comprising spiral blades, a spiral shaft, a generator, a support body, and a sleeve. The spiral shaft is connected to the generator via a coupling. The spiral shaft is fixed at both ends to bearings A and B, respectively, which are fixed to the axial ends of the support body. An upwardly open circular arc-shaped sleeve is fixed to the support body. The spiral shaft is placed within the sleeve. The spiral blades are evenly distributed on the spiral shaft. A gap δ is formed between the spiral blades and the sleeve. The axial ends of the support body are fixed to the riverbed at a certain angle θ by concrete. The horizontal distance between bearing B and the sleeve is L1, and the distance between the center axis of bearing B and the support body is R, where L1 ≥ Rtgθ. This utility model has a simple structure and is easy to install and disassemble. The generator set utilizes the clearance between the spiral blades and the support body to fully utilize the energy of the water flow, allowing even low-head water to be used for continuous power generation.

[0004] However, in the process of conceiving and realizing the above application, the inventors found that during actual use, the above technical solution was limited by the connection method between the generator and the screw shaft. The generator could only be installed at an angle. The generator installed at an angle was prone to excessive vibration during operation, thereby reducing its service life. Utility Model Content

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a hydroelectric generator installed in a pipeline.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] A hydroelectric generator installed in a pipeline comprises a river channel having an inclined section and a horizontal section, wherein the hydroelectric generator installed in the pipeline further comprises:

[0008] A pipeline is fixed obliquely to the inclined section of the river channel, a spiral impeller is installed in the pipeline, and the end of the spiral impeller's spiral shaft close to the horizontal section of the river channel is connected to a generator through a universal coupling, and the generator is horizontally installed in the horizontal section of the river channel;

[0009] There is a gap between the spiral impeller and the inner wall of the pipe. Both ends of the pipe are open structures. When water flows through the pipe, the spiral impeller is driven to rotate, so that the spiral shaft drives the universal coupling to rotate synchronously.

[0010] Optionally, support rods are respectively provided at the bottom and top of the pipe, and the end of the support rod away from the central axis of the pipe is fixedly connected to the inner wall of the pipe, and the end of the support rod close to the central axis of the pipe is fixed with a support seat, and a mounting hole is opened in the middle of the support seat, and a bearing is provided in the mounting hole, the outer ring of the bearing is fixed to the mounting hole, and the inner ring of the bearing is fixed to the spiral shaft.

[0011] Optionally, there are six support rods, three of which are arranged in a circular array at the bottom of the pipe, and the other three are arranged in a circular array at the top of the pipe, with spacing between adjacent support rods to form a water circulation space.

[0012] Optionally, the generator is installed on a horizontal section of the river channel through a support platform.

[0013] Optionally, the spiral impeller and the spiral shaft are made of ZG06Cr13Ni6Mo martensitic stainless steel.

[0014] Optionally, the generator is a DC generator, the output end of the generator is electrically connected to a battery, and the output end of the battery is electrically connected to an inverter.

[0015] Optionally, the generator is an AC generator, and a rectifier is electrically connected between the generator and the battery.

[0016] The beneficial effects of the present application are as follows: the generator and the screw shaft of the present application are connected through a universal coupling, and the universal coupling has a large angular compensation capability. Even if the screw shaft and the rotor shaft of the generator are not on the same axis, the connected screw shaft and the rotor shaft of the generator can be continuously rotated when there is an axis angle, and torque and motion can be reliably transmitted, so that the generator can be installed horizontally, thereby avoiding the problems of excessive vibration and reduced service life caused by inclined installation.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0019] Figure 1 1 is a schematic structural diagram of a hydroelectric generator installed in a pipeline shown in an embodiment of the present application;

[0020] Figure 2 1 is another structural schematic diagram of a hydroelectric generator installed in a pipeline shown in an embodiment of the present application;

[0021] Figure 3 is a side view of a pipeline shown in an embodiment of the present application;

[0022] Figure 4 This is a structural diagram of an AC generator shown in an embodiment of the present application.

[0023] Figure numerals: 1 river channel, 2 pipeline, 3 spiral impeller, 4 spiral shaft, 5 universal joint, 6 generator, 7 support rod, 8 support seat, 9 bearing, 10 support platform, 11 battery, 12 inverter, 13 rectifier. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "central axis", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] 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 at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise expressly specified or limited. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" mean 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 invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0029] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0030] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0031] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings to facilitate understanding by technical personnel.

[0032] Example 1:

[0033] See also Figure 1 and Figure 2 A hydroelectric generator installed in a pipeline comprises a river channel 1 having an inclined section and a horizontal section, and the hydroelectric generator installed in the pipeline further comprises:

[0034] A pipe 2 is fixed obliquely to the inclined section of the river channel 1, and a spiral impeller 3 is installed in the pipe 2. The end of the spiral shaft 4 of the spiral impeller 3 close to the horizontal section of the river channel 1 is connected to a generator 6 through a universal coupling 5. The generator 6 is horizontally installed in the horizontal section of the river channel 1;

[0035] There is a gap between the spiral impeller 3 and the inner wall of the pipe 2. Both ends of the pipe 2 are open structures. When water flows through the pipe 2, the spiral impeller 3 is driven to rotate, so that the spiral shaft 4 drives the universal coupling 5 to rotate synchronously.

[0036] Specifically, the pipeline 2 is made of stainless steel or coated with an anti-corrosion layer to avoid corrosion damage by river water. The two ends of the spiral shaft 4 are respectively installed at the bottom and top of the pipeline 2. Both ends of the pipeline 2 are open structures to facilitate water flow. There are multiple groups of spiral impellers 3, which can be reasonably arranged according to the length of the inclined section of the river channel 1. In this embodiment, the structural design of the spiral impeller 3 adopts an inclined turbine design, adopts an Archimedean spiral turbine design, and uses 8-10 groups of blades to achieve the best rotation effect. The spiral blades can be single spiral blades, double spiral blades or multiple spiral blades. There is a gap between the spiral impeller 3 and the inner wall of the pipeline 2 to avoid friction between the spiral impeller 3 and the inner wall of the pipeline 2 when rotating. One end of the universal coupling 5 is fixedly connected to one end of the spiral shaft 4 close to the horizontal section of the river channel 1, and the other end is fixedly connected to the rotor shaft of the generator 6;

[0037] Because the river channel 1 has an inclined section, a pressure difference is generated when water flows through it (the arrow in the figure indicates the direction of water flow). The pressure difference generated by the water flow drives the spiral impeller 3 to rotate, and the spiral impeller 3 drives the spiral shaft 4, which drives the universal coupling 5 to rotate synchronously. The universal coupling 5 then drives the rotor of the generator 6 to rotate synchronously. The rotor cuts the magnetic lines of induction in the magnetic field to generate an induced electromotive force, thereby generating current;

[0038] In this embodiment, the generator 6 and the spiral shaft 4 are connected by a universal joint 5. The universal joint 5 has a large angular compensation capability. Even if the rotor shafts of the spiral shaft 4 and the generator 6 are not on the same axis, the connected spiral shaft 4 and the rotor shaft of the generator 6 can rotate continuously when there is an axis angle, and torque and motion can be reliably transmitted, so that the generator 6 can be installed horizontally, thereby avoiding the problem of excessive vibration and reduced service life caused by inclined installation.

[0039] Example 2:

[0040] See also Figure 3 Based on embodiment 1, optionally, support rods 7 are respectively provided at the bottom and top of the pipe 2, and the end of the support rod 7 away from the central axis of the pipe 2 is fixedly connected to the inner wall of the pipe 2, and the end of the support rod 7 close to the central axis of the pipe 2 is fixed with a support seat 8, and a mounting hole is opened in the middle of the support seat 8, and a bearing 9 is provided in the mounting hole. The outer ring of the bearing 9 is fixed to the mounting hole, and the inner ring of the bearing 9 is fixed to the spiral shaft 4.

[0041] Specifically, the width of the end of the support rod 7 away from the central axis of the pipe 2 is greater than the width of the end of the support rod 7 close to the central axis of the pipe 2, so that the support rod 7 is fan-shaped. The support rod 7 is fixed between the inner wall of the pipe 2 and the outer wall of the support seat 8 to support the support seat 8. The outer ring of the bearing 9 is fixed to the inner wall of the mounting hole, and the inner ring of the bearing 9 is fixed to the outer wall of the screw shaft 4, so that when the screw shaft 4 rotates, the support seat 8 and the support rod 7 can remain stationary.

[0042] In this embodiment, the spiral shaft 4 is supported by arranging a support rod 7, a support seat 8 and a bearing 9 at the bottom and top of the pipe 2 respectively, thereby realizing the installation of the spiral shaft 4. At the same time, the spiral shaft 4 will not affect the pipe 2 when rotating.

[0043] Optionally, there are six support rods 7, three of which are arranged in a circular array at the bottom of the pipe 2, and the other three support rods 7 are arranged in a circular array at the top of the pipe 2, with spacing between adjacent support rods 7 to form a water circulation space.

[0044] Specifically, there is a spacing between adjacent support rods 7, and the angle between adjacent support rods 7 is 120°. Three support rods 7 constitute three water circulation spaces. Three support rods 7 are respectively arranged at the bottom and top of the pipe 2. While ensuring the support strength, the water circulation space is increased as much as possible to ensure the water flow rate, thereby avoiding the problem of reduced water energy utilization rate caused by excessive speed loss.

[0045] Optionally, the generator 6 is installed on a horizontal section of the river channel 1 through a support platform 10 .

[0046] Specifically, the lower end of the generator 6 is detachably connected to the upper end surface of the support platform 10, and the lower end surface of the support platform 10 is fixedly connected to the horizontal section of the river channel 1. The support platform 10 should not be set too large to avoid obstructing the flow of water. Taking into account that the slopes of different river channels 1 are not the same, the angles between the two axes of universal couplings of different structural types are also different, generally between 5°-45°. Therefore, the height of the support platform 10 can be changed to make the angle between the two axes of the universal coupling within a reasonable range, while ensuring the horizontal installation of the generator 6.

[0047] Optionally, the spiral impeller 3 and the spiral shaft 4 are made of ZG06Cr13Ni6Mo martensitic stainless steel.

[0048] Specifically, ZG06Cr13Ni6Mo martensitic stainless steel has excellent strength, plasticity, toughness, weldability and corrosion resistance, and is suitable for the corrosive river environment. At the same time, its high strength can also ensure long-term operation.

[0049] See also Figure 1 and Figure 2 Optionally, the generator 6 is a DC generator, the output end of the generator 6 is electrically connected to the battery 11, and the output end of the battery 11 is electrically connected to the inverter 12.

[0050] Specifically, in this embodiment, the generator 6 is a DC generator, and the output terminals of the DC generator are connected to the positive and negative poles of the battery 11 through wires, thereby converting electrical energy into chemical energy and storing it in the battery 11. The output terminals of the battery 11 are connected to the positive and negative poles of the inverter 12 through wires. The inverter 12 can convert the 12V output voltage of the battery 11 into a 220V output voltage to meet the use requirements of electrical equipment.

[0051] It should be noted that the battery 11 and the inverter 12 are both existing technologies, and their specific structures are not described in detail in this embodiment.

[0052] Example 3:

[0053] See also Figure 4 Based on the first embodiment, optionally, the generator 6 is an AC generator, and a rectifier 13 is electrically connected between the generator 6 and the battery 11 .

[0054] Specifically, in this embodiment, the generator 6 is an AC generator, the output terminals of the AC generator are connected to the positive and negative poles of the rectifier 13 through wires, the rectifier 13 is connected to the battery 11 through wires, and the battery 11 is connected to the inverter through wires. Since the battery 11 can only input direct current, the rectifier 13 is provided to convert alternating current into direct current so that the electric energy generated by the generator 6 can be stored in the battery 11.

[0055] It should be noted that the battery 11 , the inverter 12 , and the rectifier 13 are all existing technologies, and their specific structures are not described in detail in this embodiment.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A hydroelectric generator installed in a pipeline, comprising a river channel (1) having an inclined section and a horizontal section, characterized in that: The hydroelectric generator installed in the pipeline also includes: A pipe (2) is fixed obliquely to the inclined section of the river channel (1), a spiral impeller (3) is installed in the pipe (2), and a spiral shaft (4) of the spiral impeller (3) is connected to a generator (6) via a universal coupling (5) at one end close to the horizontal section of the river channel (1), and the generator (6) is horizontally installed in the horizontal section of the river channel (1); There is a gap between the spiral impeller (3) and the inner wall of the pipe (2), and both ends of the pipe (2) are open structures. When water flows through the pipe (2), the spiral impeller (3) is driven to rotate, so that the spiral shaft (4) drives the universal coupling (5) to rotate synchronously.

2. The hydroelectric generator installed in a pipeline according to claim 1, characterized in that: The bottom and top of the pipe (2) are respectively provided with support rods (7), one end of the support rod (7) away from the central axis of the pipe (2) is fixedly connected to the inner wall of the pipe (2), and the end of the support rod (7) close to the central axis of the pipe (2) is fixed with a support seat (8), a mounting hole is opened in the middle of the support seat (8), a bearing (9) is provided in the mounting hole, the outer ring of the bearing (9) is fixed to the mounting hole, and the inner ring of the bearing (9) is fixed to the spiral shaft (4).

3. The hydroelectric generator installed in a pipeline according to claim 2, characterized in that: There are six support rods (7), three of which are arranged in a circular array at the bottom of the pipe (2), and the other three support rods (7) are arranged in a circular array at the top of the pipe (2), with spacing between adjacent support rods (7) to form a water circulation space.

4. The hydroelectric generator installed in a pipeline according to claim 1, characterized in that: The generator (6) is installed on the horizontal section of the river channel (1) via a support platform (10).

5. The hydroelectric generator installed in a pipeline according to claim 1, characterized in that: The spiral impeller (3) and the spiral shaft (4) are made of ZG06Cr13Ni6Mo martensitic stainless steel.

6. The hydroelectric generator installed in a pipeline according to claim 1 or 4, characterized in that: The generator (6) is a DC generator, the output end of the generator (6) is electrically connected to a battery (11), and the output end of the battery (11) is electrically connected to an inverter (12).

7. The hydroelectric generator installed in a pipeline according to claim 1 or 4, characterized in that: The generator (6) is an AC generator, and a rectifier (13) is electrically connected between the generator (6) and the battery (11).

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