Intelligent tail water power generation device adopting grading power generation mode

Abstract

The invention provides an intelligent tail water power generation device adopting a grading power generation mode, and relates to the technical field of generator set manufacturing, and the intelligent tail water power generation device comprises a rack mounted in a water storage area, a pipe body vertically arranged on the rack, a spiral rotating body coaxially and rotatably arranged in the pipe body, a multi-stage transmission mechanism, a power generation mechanism and an overload protection mechanism. Tail water flow drives the spiral rotating body to rotate through the pipe body, and kinetic energy is improved through the multi-stage transmission mechanism and transmitted to the power generation mechanism for power generation. The overload protection mechanism is used for automatically disconnecting transmission connection when the tail water flow load is abnormal, overload damage is avoided, the system stability and the power generation efficiency are improved, and the system is suitable for the water source environment with the height difference and the extreme weather influence.

Description

Technical Field

[0001] The present invention relates to the technical field of generator set manufacturing, and particularly to an intelligent tail water power generation device adopting a hierarchical power generation method. Background Art

[0002] At present, as a clean and renewable energy form, hydropower focuses on effectively converting the potential energy stored in water bodies into electric energy and is widely used in power generation projects of various scales. With the increasingly clear goal of urban energy conservation and emission reduction, the head and flow generated during the process of the sewage treatment plant discharging the tail water up to the standard are gradually regarded as an exploitable water energy resource, becoming a new entry point for power generation within the city. Tail water power generation is a green and clean energy technology based on the head of the sewage treatment plant's effluent discharge for power generation. It not only does not require additional consumption of fuel resources but also does not release pollutants or waste, having good ecological and economic benefits. To achieve this energy conversion process, in engineering, a pipeline-type power generation device is usually set up, so that the tail water drives a rotating mechanism in the discharge path and then drives the generator to work, thereby utilizing the tail water energy that was originally ignored. Under this background, tail water power generation devices have been widely concerned and applied, and they usually adopt multiple spiral blades of different specifications to still maintain a high power generation efficiency under the condition of fluctuating tail water flow.

[0003] However, such structures in the prior art have significant deficiencies in dealing with unstable tail water flow, especially when the discharge volume surges suddenly in a short time. Specifically, when the tail water flow exceeds the design load, the components inside the transmission structure are easily damaged by excessive impact force, resulting in a decrease in power generation efficiency, poor system stability, shortened operation life, increased equipment maintenance frequency, and a significant increase in operation cost, making it difficult to meet the dual requirements of the continuous and stable operation of the sewage treatment plant and green energy recovery. Therefore, the existing hierarchical hydropower technology still has obvious defects in adapting to the volatility of the sewage treatment plant's tail water discharge, and there is an urgent need for a new type of intelligent power generation device with a reasonable structure, reliable operation, and certain overload protection ability to improve the energy recovery efficiency of the tail water and the use stability of the system. Summary of the Invention

[0004] The present application discloses an intelligent tail water power generation device adopting a hierarchical power generation method to solve the technical problem that the power generation device is easily damaged when the tail water flow exceeds the load in extreme weather in the related art.

[0005] The present application provides an intelligent tail water power generation device adopting a hierarchical power generation method, adopting the following technical solutions: An intelligent tail water power generation device adopting a hierarchical power generation method, comprising: A frame, installed in the water storage area; The pipe body is vertically installed on the frame, and the upper end opening of the pipe body communicates with the water storage area, and the lower end part communicates with the water discharge area; The spiral rotating body is coaxially and rotatably installed in the pipe body and is used to rotate when passing through the tail water flow in the pipe body; The multi-stage transmission mechanism is installed on the frame, and the first end of the multi-stage transmission mechanism is in transmission connection with the spiral rotating body; The power generation mechanism and the overload protection mechanism are both installed on the frame. The power generation mechanism is in transmission connection with the second end of the multi-stage transmission mechanism through the overload protection mechanism and is used to convert the kinetic energy of the multi-stage transmission mechanism into its own electric energy. The overload protection mechanism is used to automatically disconnect the transmission connection between the multi-stage transmission mechanism and the power generation mechanism when the tail water flow in the pipe body exceeds the load flow, and maintain the transmission connection between the multi-stage transmission mechanism and the power generation mechanism when the tail water flow in the pipe body is at the normal flow.

[0006] Preferably, the spiral rotating body includes a rotating bearing, rotating blades and a rotating rod. An annular installation groove is provided on the inner side wall of the pipe body. The outer ring of the rotating bearing is configured to be in interference fit with the annular installation groove. The inner ring of the rotating bearing is connected with a cross-shaped installation frame. The rotating rod is coaxially connected to the installation frame. A plurality of rotating blades are circumferentially arranged on the inner ring of the rotating bearing. The rotating rod is in transmission connection with the multi-stage transmission mechanism.

[0007] Preferably, the upper end opening of the pipe body is configured as a water inlet, the lower end of the pipe body is sealed, and the rotating rod passes through the lower end of the pipe body and extends into the frame and is in transmission connection with the multi-stage transmission mechanism; A water outlet is opened on the side wall of the pipe body near the lower end, and an inclined branch pipe is communicated with the water outlet. The inclined branch pipe is communicated with the water discharge area.

[0008] Preferably, the multi-stage transmission mechanism includes a first-stage transmission gear and a second-stage transmission gear. A transmission chamber is provided in the frame. The first-stage transmission gear and the second-stage transmission gear are both rotatably arranged in the transmission chamber and are meshed in sequence. Among them, The first end of the multi-stage transmission mechanism is the first-stage transmission gear, and the first-stage transmission gear is coaxially connected with one end of the rotating rod located in the frame; The second end of the multi-stage transmission mechanism is the second-stage transmission gear, and the second-stage transmission gear is in transmission connection with the power generation mechanism through the overload protection mechanism.

[0009] Preferably, the power generation mechanism includes a generator, a cable and a collector box. The generator and the collector wire are both installed on the frame. The generator is electrically connected to the collector box through the cable. The output shaft of the generator extends into the transmission chamber, and the output shaft of the generator is in transmission connection with the second-stage transmission gear through the overload protection mechanism.

[0010] Preferably, the overload protection mechanism includes a protection gear, a first pressing annular disc, and a pressing component. Among them, the protection gear is rotatably arranged in the transmission chamber and meshes with the secondary transmission gear; an axial transmission groove is formed in the protection gear, the first pressing annular disc is connected to the inner wall of the transmission groove, the output shaft of the generator is configured to axially extend into the transmission groove and pass through the inner ring of the first pressing annular disc, a second pressing annular disc is arranged on the output shaft of the generator, and the second pressing annular disc axially abuts against the second pressing annular disc to form a friction transmission structure; the pressing component is arranged in the transmission groove and is used to apply an axial pre-tightening force acting on the first pressing annular disc to the second pressing annular disc; When the tail water flow in the pipe body exceeds the load flow and the rotational force of the protection gear is greater than the frictional force between the first pressing annular disc and the second pressing annular disc, the first pressing annular disc and the second pressing annular disc rotate relative to each other to disconnect the transmission connection between the multi-stage transmission mechanism and the power generation mechanism.

[0011] Preferably, two second pressing annular discs are axially spaced on the output shaft of the generator, and the two second pressing annular discs axially abut against the upper surface and the lower surface of the first pressing annular disc respectively.

[0012] Preferably, the pressing component includes a pressing cylinder, a pressing rod, a ball, and a compression spring. The pressing cylinder is axially arranged on the inner end wall of the transmission chamber, the pressing rod is slidably inserted into the pressing cylinder, the ball is rotatably embedded at the end of the pressing rod away from the pressing cylinder, an annular rolling groove is formed on the surface of the second pressing annular disc, the ball is in rolling cooperation with the annular rolling groove, and the compression spring is arranged between the pressing cylinder and the pressing rod and always has a tendency to push the pressing rod out of the pressing cylinder so that the second pressing annular disc abuts against the first pressing annular disc.

[0013] Preferably, an anti-rotation groove is axially formed on the surface of the output shaft of the generator, an anti-rotation block is radially arranged on the inner ring of the second pressing annular disc, the anti-rotation block axially slides in the anti-rotation groove, and the thickness of the anti-rotation block is less than the length of the moving groove.

[0014] Preferably, a cooling mechanism is further included. The cooling mechanism is arranged on the frame and is used to automatically cool the generator when the secondary transmission gear rotates; the cooling mechanism includes a cooling pipe, a water-blocking circular plate, a rotating rod, and a torsion spring. Among them, the cooling pipe includes an inclined pipe and a horizontal straight pipe which are communicated with each other. The highest inclined end of the inclined pipe is communicated with the pipe body, the lowest end is communicated with the horizontal straight pipe, and a part of the horizontal straight pipe is attached to the surface of the generator and then communicated with the water discharge area; The water-blocking circular plate is rotatably arranged in the horizontal straight pipe, and the shape of the plate surface of the water-blocking circular plate is adapted to the cross-sectional shape of the horizontal straight pipe; The rotating rod is coaxially arranged at the edge of the water-blocking circular plate and extends vertically downward outside the horizontal straight pipe. The torsion spring is arranged between the rotating rod and the outer wall of the horizontal straight pipe, and the torsion spring always has a tendency to push the water-blocking circular plate to a position facing the horizontal straight pipe; A driving rod is coaxially arranged on the secondary transmission gear. The driving rod extends vertically upward. A flapping piece is arranged on the rod wall near the top of the driving rod. A fitting piece is arranged on the rod wall near the bottom of the rotating rod. The flapping piece can be attached to the fitting piece during the rotation of the driving rod and push the rotating rod to rotate against the torsion of the torsion spring.

[0015] The present invention has the following advantages and beneficial effects: 1. The present invention constitutes a hierarchical power generation structure through a spiral rotating body, a multi-stage transmission mechanism, a power generation mechanism and an overload protection mechanism, making full use of the velocity difference of the tail water flow at different positions, efficiently transmitting the kinetic energy of the tail water flow to the first-stage and second-stage runner assemblies in sequence, and sequentially transmitting it to the power generation mechanism through the secondary transmission gear. This structural design not only enhances the adaptability of the power generation device to water energy, but also expands the applicable flow velocity range of the device, and can achieve continuous power generation at a high energy efficiency level under different flow conditions. At the same time, by setting an overload protection mechanism, when the tail water flow velocity in the pipe suddenly changes, the connection between the generator and the transmission mechanism can be actively disconnected before the friction transmission structure becomes unstable, thus reducing the risk of generator damage caused by overload to a certain extent and ensuring the reliability and stability of the entire system during long-term operation; 2. In order to cope with the load impact problem caused by sudden changes in the tail water flow rate, the present invention sets up a friction transmission type overload protection mechanism composed of a protection gear, a first pressing annular disc, two second pressing annular discs and a pressing assembly. The output shaft of the generator and the protection gear form a non-rigid connection through the above structure, and the first pressing annular disc and the second pressing annular disc can slide relative to each other when the output torque exceeds the set friction force, thereby disconnecting the power transmission path. The friction transmission design of this structure is simple in structure and rapid in response, and the pressing assembly can continuously apply an appropriate pre-tightening force to the second pressing annular disc through the cooperation of the pressure cylinder, the pressure rod, the ball and the pressure spring, thereby stabilizing the friction torque and realizing an immediate response to the overload state. In addition, through the mutual cooperation of the anti-rotation groove and the anti-rotation block, not only the rotational freedom of the second pressing annular disc during axial movement is restricted, but also its synchronous rotation with the output shaft is maintained in the radial direction, improving the stability and effectiveness of the friction transmission structure, and playing a reliable torque protection and rotation stability role in the overall structure; 3. The present invention cleverly combines the tailwater flow with the rotational motion of the secondary transmission gear by introducing a cooling mechanism linked to the transmission structure, thereby forming a passive cooling system that does not require external power drive. The cooling mechanism includes a cooling pipeline composed of an inclined tube and a horizontal straight tube, a water retaining disc rotatably arranged therein, a rotating rod connected thereto, and a torsion spring structure that provides a reset force thereto. Among them, the driving rod and the flapping plate can periodically push the fitting plate during the rotation process, thereby causing the water retaining disc to temporarily open the cooling channel, thereby realizing the intermittent release and flow of the cooling tailwater. When the generator generates heat during long-term operation, the pulsed tailwater flow generated by the fitting structure can periodically approach the surface of the generator and take away part of the heat, forming a dynamic heat exchange process. Since the cooling tailwater flow is not continuously injected, but the flow rate is controlled by the periodic push of the flapping plate and the automatic reset action of the torsion spring, the utilization rate of the tailwater can be effectively improved, while also reducing the adverse consequences such as condensation of electrical components caused by excessive cooling. While improving the operating safety of the generator, it also enhances the environmental adaptability and continuous operation capability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present application; Figure 2 This is a cross-sectional structure diagram for illustrating a spiral rotating body in an embodiment of the present application; Figure 3 yes Figure 1 A magnified view of part A in FIG. Figure 4 yes Figure 1 Enlarged view of part B in .

[0018] The markings in the figure are: 1. Frame; 2. Pipe body; 21. Annular mounting groove; 22. Inclined branch pipe; 3. Spiral rotating body; 31. Rotating bearing; 311. Mounting frame; 32. Rotating blade; 33. Rotating rod; 4. Multi-stage transmission mechanism; 41. First-stage transmission gear; 42. Second-stage transmission gear; 421. Driving rod; 422. Flapping piece; 5. Power generation mechanism; 51. Generator; 511. Second abutting annular disc; 5111. Anti-rotation block; 512. Anti-rotation groove; 52. Cable; 53. Power collecting box; 6. Overload protection mechanism; 61. Protection gear; 62. First abutting annular disc; 63. Pressing assembly; 631. Pressing cylinder; 632. Pressing rod; 633. Ball; 634. Pressing spring; 7. Cooling mechanism; 71. Cooling pipe; 711. Inclined pipe; 712. Horizontal straight pipe; 72. Water blocking circular plate; 73. Rotating rod; 731. Fitting piece; 74. Torsion spring. Detailed implementation mode

[0019] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0020] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0021] Some embodiments of this application provide an intelligent tail water power generation device using a hierarchical power generation method. This device is suitable for installation between a water storage area and a water discharge area with a high and low drop, and can achieve a relatively stable and efficient process of converting water energy into electrical energy under different tail water flow conditions.

[0022] Please refer to Figure 1, the device includes a frame 1, a pipe body 2, a spiral rotating body 3, a multi-stage transmission mechanism 4, a power generation mechanism 5, and an overload protection mechanism 6. Among them, the frame 1 is arranged around the water storage area of the installation site to support the stability of the overall structure. The pipe body 2 is vertically installed on the frame 1 and is arranged in a state of being through from top to bottom. Its upper end opening is connected to the water storage area, so that the tail water flow in the water storage area can naturally flow into the inside of the pipe body 2, and the lower end part is connected to the water discharge area to guide the tail water flow to discharge. The spiral rotating body 3 is coaxially and rotatably installed inside the pipe body 2, and its outer shape is a rotating member spirally arranged along the axial direction, which is used to rotate when being pushed by the tail water flow during the process of the tail water flow flowing from top to bottom. Through the contact between the spiral rotating body 3 and the tail water flow and the rotation generated by the kinetic energy of the tail water flow, a primary mechanical kinetic energy output is formed.

[0023] Furthermore, the multi-stage transmission mechanism 4 is installed on the frame 1, and its first end is in transmission connection with the spiral rotating body 3, which is used to gradually transmit and increase the torque generated by the spiral rotating body 3 to the power specification suitable for the input end of the power generation mechanism 5. The multi-stage transmission mechanism 4 can be any combination form of mechanical transmission structures such as a gear set, a sprocket system, or a pulley set, and its purpose is to adapt to the energy transmission under different rotational speed and torque requirements. At the second end of the multi-stage transmission mechanism 4, it is in transmission connection with the power generation mechanism 5 through the overload protection mechanism 6. The power generation mechanism 5 can be a permanent magnet generator 51 or other power generation equipment suitable for small water conservancy environments, which is used to convert the incoming kinetic energy into electrical energy.

[0024] Specifically, the overload protection mechanism 6 is provided to respond to the rotational load fluctuations caused by the changes in the tail water flow. Since under extreme weather conditions, there may be a sudden increase in short-term high flow in the water storage area. At this time, a large amount of water enters the inside of the pipe body 2, pushing the spiral rotating body 3 to rotate at a high speed, which may cause the multi-stage transmission mechanism 4 and the power generation mechanism 5 to be subjected to excessive loads. To reduce the losses brought to the power generation mechanism 5 and related transmission components in such situations, the overload protection mechanism 6 has the function of detecting the changes in the tail water flow load in the pipe body 2 and can automatically interrupt the transmission connection between the multi-stage transmission mechanism 4 and the power generation mechanism 5 when the tail water flow exceeds the set load flow. The interruption mechanism can be realized through a clutch device, a shear pin structure, or other mechanical structures that can respond under overload conditions, ensuring that the connection can be automatically restored after the tail water flow drops back to the normal range, and enabling the power generation mechanism 5 to work again. Through the above structural design, it is beneficial to avoid premature wear or damage of the power generation mechanism 5 and transmission components caused by overload to a certain extent, and improve the stable operation ability and service life of the entire system.

[0025] It should be noted that the vertical installation of the tube body 2 does not require it to be strictly vertical, but only needs to satisfy the requirement that the tailwater flow can form an effective flow path under the action of gravity and can fully act on the spiral rotor 3. "Coaxial" means that the rotation axis of the spiral rotor 3 is basically coincident with the axis of the tube body 2, so that the spiral structure can obtain the optimal driving force in the center area of the fluid. The multi-stage transmission mechanism 4 is connected to the spiral rotor 3 and the power generation mechanism 5 through components such as transmission shafts and couplings, and a certain degree of self-aligning ability is required to cope with deviations during the installation and operation of the device. Therefore, in terms of the coordination of structure and function, this embodiment can effectively realize the utilization of flowing water bodies such as urban drainage systems, and has good application prospects.

[0026] In some embodiments, in combination Figure 1 , Figure 2 The spiral rotating body 3 includes a rotating bearing 31, a rotating blade 32 and a rotating rod 33, which are integrally arranged inside the pipe body 2 and coaxially arranged to achieve a rotational motion consistent with the direction of the tailwater flow in the pipe body 2. In order to make the spiral rotating body 3 have a stable installation structure in the pipe body 2, the inner wall of the pipe body 2 is provided with an annular installation groove 21, which is opened along the circumference of the pipe body 2 and is used to assemble with the outer ring of the rotating bearing 31. Specifically, the outer ring of the rotating bearing 31 and the annular installation groove 21 are installed in an interference fit manner, that is, the size of the outer ring is slightly larger than the size of the installation groove, so that the rotating bearing 31 can be firmly maintained inside the pipe body 2 after installation, which is conducive to improving the support effect during the rotation process, reducing the risk of bearing shaking or offset, and helping to achieve the stability of the device operation.

[0027] Furthermore, the inner ring of the rotating bearing 31 is connected with a cross-shaped mounting frame 311, and the mounting frame 311 is not only used to carry the rotating rod 33 connected subsequently, but also enhances the supporting force and bearing strength of the structure through the cross structure, so as to evenly distribute the torque generated by the impact of the tailwater flow during the rotation process and improve the operational reliability. The rotating rod 33 is coaxially connected to the center of the mounting frame 311 along the axial direction, and one end thereof extends to the top of the pipe body 2 and is connected to the multi-stage transmission mechanism 4 arranged on the frame 1. Through this transmission connection, when the tailwater flow enters the interior of the pipe body 2, it flows along the vertical direction of the pipe body 2. When encountering the spirally arranged rotating blades 32, the tangential force between the blades and the tailwater flow will drive the entire spiral rotating body 3 to rotate, thereby inputting mechanical kinetic energy into the multi-stage transmission mechanism 4 through the rotating rod 33.

[0028] Exemplarily, on the inner ring of the rotating bearing 31, a plurality of rotating blades 32 are provided along its circumferential direction. These blades are arranged at a certain inclination angle and are evenly distributed around the circumference of the bearing, enabling them to effectively receive the impact force of the tail water flow at different tail water flow angles, thereby improving the conversion efficiency of water energy. The number, inclination angle, and shape of the blades can be appropriately adjusted according to the tail water flow velocity and flow rate in the actual use environment to achieve a better rotation efficiency. It should be noted that the so-called "a plurality of rotating blades 32" does not limit its specific number, but refers to the multi-piece configuration adopted in the design of this structure to facilitate balanced operation and reduce rotational resistance during the impact of the tail water flow.

[0029] Through the above structural design, it is beneficial to a certain extent to improve the adaptability of the device in a complex tail water flow environment, enhance the capture efficiency of water energy and the stability of rotational output. At the same time, through the stable connection between the rotating bearing 31 and the pipe body 2, and in cooperation with the rigid support of the cross-shaped mounting frame 311, the entire spiral rotating body 3 has good durability during long-term use, reducing the maintenance requirements caused by component loosening or wear, and contributing to the stable application of the present invention in urban drainage systems or other water resource flow areas.

[0030] In some embodiments, referring to Figure 1 , the pipe body 2 is a hollow structure, and its upper end opening is configured as an inlet, which is directly connected to the water storage area for guiding the tail water flow in the water storage area to enter the interior of the pipe body 2 from top to bottom, thereby providing a continuous water source for the spiral rotating body 3 arranged inside. The lower end of the pipe body 2 is sealed, that is, its bottom structure is in a closed state to prevent the tail water flow from directly flowing out from the bottom, thereby forming a closed diversion channel, enabling the tail water flow to form a stable flow path inside the pipe body 2, which is beneficial to improving the force efficiency and rotational stability of the spiral rotating body 3.

[0031] The rotating rod 33 passes through the lower end of the closed pipe body 2 and extends into the interior of the frame 1, and is in transmission connection with the multi-stage transmission mechanism 4 arranged on the frame 1 to effectively convert the kinetic energy of the tail water flow into electrical energy. To discharge the tail water flow, a water outlet is provided on the side wall of the pipe body 2 near the lower end. The position of the water outlet is selected so that after the spiral rotating body 3 completes power output, the tail water flow can be naturally discharged, avoiding water accumulation and causing reverse resistance. An inclined branch pipe 22 is connected to the water outlet. The branch pipe extends outward and has a certain inclination angle, and its end is communicated with the water discharge area, which is used to smoothly guide the discharged tail water flow to the downstream or other safe discharge areas. The above-mentioned inclined setting not only benefits the rapid discharge of the tail water flow and reduces the blockage of the rotating components, but also helps to extend the service life of the device to a certain extent. It should be noted that the so-called "sealed setting" does not mean completely airtight and impenetrable, but refers to a closed structure without a tail water flow outlet, but can be penetrated by the rotating rod 33 and provide sealing treatment. Therefore, it should be understood as a functional closure in the structural expression. The overall structural design helps to reasonably arrange each functional component in a limited space, making the device suitable for various complex application environments such as urban pipe networks.

[0032] In some embodiments, in combination with Figure 1 , the multi-stage transmission mechanism 4 includes a first-stage transmission gear 41 and a second-stage transmission gear 42. Each transmission gear is sequentially meshed to form a transmission structure, and all are arranged in a preset transmission chamber in the frame 1. The transmission chamber plays a role in fixing the gear set and protecting the transmission components. Its internal structural layout is beneficial to guiding and buffering the stress distribution during the transmission process, thereby reducing mechanical wear to a certain extent.

[0033] Specifically, the first end of the multi-stage transmission mechanism 4 is the first-stage transmission gear 41. The first-stage transmission gear 41 is coaxially connected to one end of the rotating rod 33 passing through the lower end of the pipe body 2 to receive the initial kinetic energy generated after the spiral rotating body 3 rotates. The first-stage transmission gear 41 is in meshing transmission with the second-stage transmission gear 42 to form a step-by-step transmission structural configuration. In this process, through the setting of the transmission ratio of the gear set, the gain adjustment of the rotation speed or torque can be realized, so as to meet the matching requirements of the power generation mechanism 5 for the input power, which helps to improve the overall power generation efficiency. The second end of the multi-stage transmission mechanism 4 is the second-stage transmission gear 42. The second-stage transmission gear 42 is in transmission connection with the power generation mechanism 5 through an overload protection mechanism 6 provided at its output end. Thus, energy transfer is realized under normal conditions of the tail water flow. When the water flow of the tail water is too large and the rotation speed rises abnormally, the overload protection mechanism 6 can temporarily disconnect the transmission connection between it and the power generation mechanism 5 under certain conditions, reducing the load pressure on the power generation mechanism 5.

[0034] In some examples, with reference to Figure 1, the power generation mechanism 5 includes a generator 51, a cable 52, and a collector box 53. The generator 51 and the collector box 53 are both fixedly installed on the frame 1, facilitating wiring, maintenance, and repair. As the core component for energy conversion, the output shaft of the generator 51 is set to penetrate into the transmission chamber inside the frame 1 to achieve mechanical connection with two-stage gears in the multi-stage transmission mechanism 4. Thus, after the secondary transmission gear 42 obtains the kinetic energy brought by the spiral rotating body 3 through meshing transmission, the kinetic energy can be transmitted to the output shaft of the generator 51 through the overload protection mechanism 6 for energy conversion. Through this transmission method, the operating state of the generator 51 can be stabilized to a certain extent, avoiding the impact on the power generation equipment caused by sudden changes in speed due to fluctuations in the tail water flow.

[0035] The cable 52 is used to establish an electrical connection between the generator 51 and the collector box 53, and transmit the electric energy output by the generator 51 to the collector box 53 for collection and preliminary management. The collector box 53 can be further connected to energy storage devices, power grids, or other electrical consumption terminals as needed, thereby realizing the effective utilization of the generated electric energy. It should be noted that the "through" in "the output shaft is transmission-connected to the secondary transmission gear 42 through the overload protection mechanism 6" here means that there is an intermediate overload protection mechanism 6 as a transitional connection component in the structure, which can disconnect the power transmission in the overload state and reconnect after the normal flow is restored, beneficial to reducing mechanical losses caused by abnormal tail water flow and extending the working life of the generator 51.

[0036] Overall, the structural arrangement of the power generation mechanism 5 and its connection method with the multi-stage transmission mechanism 4 contribute to the stable operation of the hydroelectric power generation device under complex working conditions and can be applied to various types of water environments, such as urban drainage systems, water channels, water tower outlets, etc., which has strong practical significance for promoting the application of intelligent water conservancy technology in distributed energy systems.

[0037] In some embodiments, combined with Figure 1 , Figure 3, the overload protection mechanism 6 includes a protection gear 61, a first pressing annular disc 62, a second pressing annular disc 511, and a pressing component 63. Among them, the protection gear 61 is arranged in the transmission chamber within the frame 1 and is meshed and installed with the secondary transmission gear 42 in the multi-stage transmission mechanism 4, so that it can synchronously obtain a rotational driving force when the multi-stage transmission mechanism 4 operates. In order to achieve overload protection for the power generation mechanism 5 when the tail water flow rate increases abnormally, a transmission groove is provided in the axial direction of the protection gear 61, and the first pressing annular disc 62 is connected inside the transmission groove, and its inner circle is attached to the output shaft of the generator 51; the structure that the output shaft of the generator 51 axially extends into the transmission groove enables it to penetrate the first pressing annular disc 62, and a second pressing annular disc 511 is provided on the output shaft. The first pressing annular disc 62 and the second pressing annular disc 511 are axially attached to form a friction transmission structure. Usually, power is transmitted from the protection gear 61 to the output shaft of the generator 51 through friction, thereby driving the generator 51 to work. To maintain the stable torque transmission ability of this friction transmission structure, a pressing component 63 is provided in the transmission groove. The structure of the pressing component 63 can adopt a spring, a threaded fastener, or other components that can apply an axial pre-tightening force. Its main function is to apply an axial force to the second pressing annular disc 511 acting on the first pressing annular disc 62, thereby increasing the friction coefficient between the two.

[0038] Based on this, when the power generation device is operating normally, that is, when the tail water flow in the pipe body 2 is within the predetermined working flow rate range, the rotational torque transmitted from the protection gear 61 is lower than the frictional torque between the first pressing annular disc 62 and the second pressing annular disc 511. At this time, the two pressing discs rotate synchronously, enabling the generator 51 to operate stably, and the energy of the tail water flow is effectively converted into electrical energy. If extreme weather or sudden flood discharge occurs, etc., resulting in a sudden increase in the tail water flow rate, the rotational torque received by the protection gear 61 will increase significantly. When this torque exceeds the maximum frictional force that the friction transmission structure can bear, relative sliding will occur between the first pressing annular disc 62 and the second pressing annular disc 511, and the transmission structure will be decoupled passively, thereby interrupting the power transmission between the protection gear 61 and the generator 51, causing the generator 51 to stop operating temporarily. In this case, the overload protection mechanism 6 achieves active disconnection of the generator 51 to a certain extent through structural response, which is beneficial to preventing the generator 51 from suffering thermal damage or mechanical fatigue due to long-term overload, thereby extending its service life and reducing the equipment maintenance frequency.

[0039] In this embodiment, "axial fitting" refers to the state of close contact between two structural members arranged along the output shaft direction of the generator 51, which is beneficial to forming a stable friction surface. The "friction drive structure" is a device that transmits rotational force through this fitting structure and does not involve rigid meshing connection, so it has a certain self-adaptive disconnection characteristic. In addition, the "pre-tightening force" is not absolutely rigidly fixed, but has a certain elastic range to allow the structure to automatically release under high load conditions, providing technical support for the overload protection mechanism. The overall structure not only ensures the transmission efficiency during power generation, but also can play an effective protective role in the case of sudden high tailwater flow, reflecting the comprehensive technical advantages of this device in terms of intelligence and hydraulic self-adaptation.

[0040] It should be noted that the naming of the above "first-stage", "second-stage" and "third-stage" transmission gears is only used to represent their sequence and meshing relationship in the structure, and does not limit the specific number of gears. It can also be increased or decreased according to different power requirements or spatial layouts. Through this multi-stage meshing structure, it is not only beneficial to improve the mechanical transmission efficiency, but also optimizes and matches the utilization of the tailwater flow energy to a certain extent, enabling the device to be more suitable for application scenarios with a large fluctuation range of tailwater flow, and enhancing its practicability and adaptability in the tailwater power generation system of sewage power plants.

[0041] In some embodiments, in combination with Figure 1 , Figure 3 , two second pressing annular disks 511 are axially spaced on the output shaft of the generator 51, and the two second pressing annular disks 511 are axially fitted to the upper surface and the lower surface of the first pressing annular disk 62 respectively. Specifically, the output shaft of the generator 51 passes through the transmission slot of the protection gear 61, and two second pressing annular disks 511 are arranged on the extension section of the output shaft. There is a certain axial distance between the two second pressing annular disks 511, just surrounding the upper and lower surfaces of the first pressing annular disk 62, thus forming a "clamping" friction drive structure in terms of structure. The first pressing annular disk 62 is clamped between the two second pressing annular disks 511, increasing the friction contact surface, and a greater frictional force can be achieved under the action of unit axial pressure, which is beneficial to providing a more stable power transmission within the normal tailwater flow load range.

[0042] With the above structural arrangement, when the multi-stage transmission mechanism 4 transmits power to the power generation mechanism 5 via the protection gear 61, the torque is transmitted through the frictional force between the first abutting annular disc 62 and the upper and lower second abutting annular discs 511. Since the friction surface is extended to two parallel surfaces, the friction drive structure is more balanced in terms of structural stress, which is beneficial to improving the mechanical stability during transmission and reducing the risk of sliding or structural wear caused by uneven load on a single surface. Further, when the torque output by the protection gear 61 exceeds the load-bearing range of the friction structure due to the increase in the tail water flow, the first abutting annular disc 62 can still rotate relatively between the two second abutting annular discs 511, thereby automatically releasing the transmission connection and realizing the overload protection function of the power generation mechanism 5. Therefore, this clamping structure not only benefits from enhancing the frictional force to a certain extent, but also improves the stability and anti-interference ability of the transmission process.

[0043] It should be noted here that "axial fitting" refers to a structural manner in which the surfaces of the two second abutting annular discs 511 and the first abutting annular disc 62 are in direct contact along the direction of the output shaft. It does not involve rigid fixing of the structure, but maintains its fitting state through the axial pre-tightening force applied by the pressing component 63. In addition, "clamping" does not mean absolute fixation, but forms an encircling support during the operation of the structure, thereby obtaining a more reliable frictional contact relationship. Through the improvement of the above technical structure, the operation stability of the device under different tail water flow intensities and the force safety of the power generation mechanism 5 can be enhanced to a certain extent without increasing excessive structural complexity.

[0044] In some examples, such as Figure 1 , Figure 3 shown, to achieve a stable and appropriate axial pre-tightening force on the friction drive structure, the pressing component 63 of this device includes a pressure cylinder 631, a pressure rod 632, a ball 633, and a pressure spring 634, with a clear structural layout and close functional cooperation. Specifically, the pressure cylinder 631 is axially fixed on the inner end wall of the transmission cavity, and its internal is a cavity structure that can accommodate the insertion movement of the pressure rod 632. The pressure rod 632 is slidably fitted in the pressure cylinder 631 and has a certain axial movement ability so that it can be axially pushed out under the action of the pressure spring 634. In order to reduce the frictional resistance while maintaining the pre-tightening force, a ball 633 is installed at the end of the pressure rod 632 away from the pressure cylinder 631. The ball 633 is rotatably embedded at the end of the pressure rod 632, so that it can roll along with the relative movement of the surface of the second abutting annular disc 511 during the axial pre-tightening process.

[0045] Further, to cooperate with the rolling installation of the ball 633, the surface of the second pressing annular disc 511 is provided with an annular rolling groove, which is arranged along the circumferential direction and forms a rolling fit with the ball 633. Through this structural cooperation, the ball 633 can move circumferentially in the rolling groove while maintaining continuous and stable pressing on the second pressing annular disc 511, so that the second pressing annular disc 511 always fits on the surface of the first pressing annular disc 62. In this structure, the compression spring 634, as an element providing the pre-tightening force, is arranged between the pressure cylinder 631 and the pressure rod 632, and its elastic force direction is to push a part of the pressure rod 632 towards the outside of the pressure cylinder 631, that is, towards the direction of the second pressing annular disc 511, so as to always apply a certain pre-tightening force to the friction structure.

[0046] Compared with simply using rigid connection or mechanical fixation, this setting method has stronger flexible adjustment ability, can automatically adapt to small changes in the structure under different working conditions, and has a certain degree of anti-interference and self-adaptive performance. Among them, "rolling fit" should be understood as a structural relationship in which there is mutual contact and relative rolling is allowed between the ball 633 and the rolling groove, which is used to reduce the frictional resistance and improve the fitting uniformity. While maintaining the pre-tightening effect, this structure is not prone to local wear or jamming phenomena, which is beneficial to extending the service life of the overload protection mechanism 6 and improving its response sensitivity. Therefore, the design of the pressing assembly 63 has obvious structural advantages in improving the transmission reliability and the overload protection response accuracy.

[0047] In some examples, combined with Figure 1 , Figure 3 , to enable the second pressing annular disc 511 to have a certain degree of freedom of movement in the axial direction while reliably achieving synchronous rotation with the output shaft of the generator 51, a rotation prevention groove 512 is specifically provided on the surface of the output shaft of the generator 51, and the rotation prevention groove 512 extends along the length direction of the output shaft, that is, the axial direction, for restricting the radial rotation of the mating member but allowing axial sliding within a certain range. Specifically, a rotation prevention block 5111 is provided on the inner ring of the second pressing annular disc 511, and the rotation prevention block 5111 is installed in a radial manner and can be inserted into the rotation prevention groove 512 to form a relative sliding connection. Since the thickness of the rotation prevention block 5111 is designed to be smaller than the length of the rotation prevention groove 512, the rotation prevention block 5111 has an axial sliding space in the rotation prevention groove 512, so that when the second pressing annular disc 511 is subjected to the acting force of the pressing assembly 63, it can slide appropriately on the output shaft to achieve a more sufficient pressing and fitting effect.

[0048] Furthermore, by coordinating the stop groove 512 and the stop block 5111, the rotation consistency between the second abutting annular disk 511 and the output shaft of the generator 51 can be maintained without hindering the axial fine-tuning of the second abutting annular disk 511. Specifically, when the stop block 5111 slides in the stop groove 512, radial relative rotation will not occur, so that the angle synchronization can be maintained during the rotation force transmission process, thereby enhancing the stability of torque transmission. In addition, when the output shaft of the generator 51 rotates, the stop block 5111 can rotate with the shaft, thereby driving the second abutting annular disk 511 to rotate, so that the friction structure can effectively play a transmission role. This structural design not only improves the response flexibility of the overload protection mechanism 6, but also helps to improve the stability of the friction fit, thereby improving the transmission reliability and power generation efficiency of the entire hierarchical power generation system.

[0049] Here, the "stop groove 512" should be understood as a groove structure opened along the surface of the output shaft for guiding and limiting rotation, and the "stop block 5111" is a component inserted in the groove, and the matching relationship is "axial sliding, radial stop". This setting method has stronger adaptability in dynamic response and transmission matching than the traditional rigid connection structure, and is particularly suitable for application in the tailwater power generation conditions of sewage treatment plants with tailwater flow fluctuations and load changes.

[0050] In some embodiments, Figure 1 , Figure 4 As shown, in order to effectively cool down the generator 51 during the operation of the tailwater power generation device, a cooling mechanism 7 is provided on the frame 1, and the cooling mechanism 7 is linked with the transmission device in structure, and can realize the automatic cooling function of the generator 51 without additional energy consumption. The cooling mechanism 7 mainly includes a cooling pipe 71, a water retaining circular plate 72, a rotating rod 73 and a torsion spring 74, wherein the cooling pipe 71 is composed of an inclined pipe 711 and a horizontal straight pipe 712, the highest end of the inclined pipe 711 is connected to the tailwater flow pipe body 2 for introducing cooling tailwater, and the lowest end is connected to the horizontal straight pipe 712, so that the cooling tailwater can flow naturally into the horizontal straight pipe 712 along the inclined pipe 711; the horizontal straight pipe 712 is partially attached to the surface of the generator 51 and then extends to the water discharge area, so that the tailwater flow can take away the heat generated by the operation of the generator 51 in the process of flowing close to the surface of the generator 51, which is conducive to maintaining the generator 51 working within a suitable temperature range and improving its working efficiency and life.

[0051] To achieve the periodic flow of the cooling tail water, a rotatable water-blocking circular plate 72 is provided in the horizontal straight pipe 712. The shape of the plate surface of the water-blocking circular plate 72 matches the cross-sectional shape of the horizontal straight pipe 712, so as to block or release the tail water flow when the plate surface rotates to a specific position. The water-blocking circular plate 72 is rotatably arranged in the horizontal straight pipe 712 through a rotating rod 73. The rotating rod 73 extends vertically downward and passes through the horizontal straight pipe 712. A torsion spring 74 is provided between the rotating rod 73 and the horizontal straight pipe 712. The torsion spring 74 continuously applies a turning force to the rotating rod 73, so that the water-blocking circular plate 72 tends to return to the initial state of blocking the tail water flow when not affected by external forces. During the operation of the power generation device, the tail water flow drives the rotating rod 33 to rotate, and then drives the secondary transmission gear 42 to rotate. A driving rod 421 is coaxially provided on the secondary transmission gear 42. The driving rod 421 extends vertically and a flapping piece 422 is provided at its upper end; while a fitting piece 731 is provided at the lower end of the rotating rod 73. When the driving rod 421 rotates with the secondary transmission gear 42, when the flapping piece 422 rotates to the corresponding position of the fitting piece 731, it will have a short contact with the fitting piece 731 and push the rotating rod 73 to rotate. At this time, the rotating rod 73 overcomes the acting force of the torsion spring 74 and drives the water-blocking circular plate 72 to open part of the horizontal straight pipe 712, forming a short-time tail water flow channel, so that the cooling tail water flows along the horizontal straight pipe 712 and cools the surface of the generator 51 in the adjacent area; and as the flapping piece 422 rotates away from the fitting piece 731, the rotating rod 73 rotates back to the original state under the action of the torsion spring 74, so that the water-blocking circular plate 72 closes the tail water flow path again.

[0052] Through the above structural settings, the cooling mechanism 7 can periodically achieve intermittent cooling of the generator 51 when the secondary transmission gear 42 rotates normally, which is beneficial to avoiding the influence of excessive tail water flow velocity on the system, and can also avoid the occurrence of condensation or other adverse working conditions caused by the long-term contact of the surface of the generator 51 with cold water. At the same time, the intermittent meshing and matching method of the "flapping piece 422" and the "fitting piece 731" can form a regular on-off state during the driving rotation, so that the tail water flow presents a pulsed flow state, which is beneficial to improving the cooling efficiency and reducing water resource waste. In this embodiment, "fitting" should be understood as mechanical contact and force application, and "pushing" is the process of applying an angular displacement to the rotating rod 73 during the rotation of the flapping piece 422, and should not be understood as a completely rigid connection or continuous action, so as to avoid misunderstanding as a permanent driving connection. This structure not only has the advantages of simple structure and flexible response on the premise of ensuring the cooling effect, but also enables the cooling process to be automatically realized with the drive of the tail water flow, improving the overall intelligence and energy-saving performance of the device.

[0053] The above is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An intelligent tail water power generation device adopting a hierarchical power generation method, characterized in that, Comprising: A frame (1), installed in a water storage area; A pipe body (2), vertically installed on the frame (1), and the upper end opening of the pipe body (2) is communicated with the water storage area, and the lower end part is communicated with a water discharge area; A spiral rotating body (3), coaxially and rotatably installed in the pipe body (2), for rotating when passing through the tail water flow in the pipe body (2); A multi-stage transmission mechanism (4), installed on the frame (1), and the first end of the multi-stage transmission mechanism (4) is in transmission connection with the spiral rotating body (3); A power generation mechanism (5) and an overload protection mechanism (6), both installed on the frame (1), the power generation mechanism (5) is in transmission connection with the second end of the multi-stage transmission mechanism (4) through the overload protection mechanism (6), for converting the kinetic energy of the multi-stage transmission mechanism (4) into its own electric energy, and the overload protection mechanism (6) is used to automatically disconnect the transmission connection between the multi-stage transmission mechanism (4) and the power generation mechanism (5) when the tail water flow in the pipe body (2) exceeds the load flow, and maintain the transmission connection between the multi-stage transmission mechanism (4) and the power generation mechanism (5) when the tail water flow in the pipe body (2) is at a normal flow; 2. The intelligent tail water power generation device adopting a hierarchical power generation method according to claim 1, characterized in that, The spiral rotating body (3) includes a rotating bearing (31), rotating blades (32) and a rotating rod (33), an annular installation groove (21) is provided on the inner side wall of the pipe body (2), the outer ring of the rotating bearing (31) is configured to be in interference fit with the annular installation groove (21), the inner ring of the rotating bearing (31) is connected with a cross-shaped installation frame (311), the rotating rod (33) is coaxially connected to the installation frame (311), a plurality of rotating blades (32) are circumferentially arranged on the inner ring of the rotating bearing (31), and the rotating rod (33) is in transmission connection with the multi-stage transmission mechanism (4); 3. The intelligent tail water power generation device adopting a hierarchical power generation method according to claim 2, characterized in that, The upper end opening of the pipe body (2) is configured as a water inlet, the lower end of the pipe body (2) is sealed, and the rotating rod (33) extends into the frame (1) after passing through the lower end of the pipe body (2) and is in transmission connection with the multi-stage transmission mechanism (4); A water outlet is opened on the side wall of the pipe body (2) near the lower end, and an inclined branch pipe (22) is communicated with the water outlet, and the inclined branch pipe (22) is communicated with the water discharge area; 4. The intelligent tail water power generation device adopting a hierarchical power generation method according to claim 2, characterized in that, The multi-stage transmission mechanism (4) includes a first-stage transmission gear (41) and a second-stage transmission gear (42), a transmission chamber is provided in the frame (1), the first-stage transmission gear (41) and the second-stage transmission gear (42) are both rotatably arranged in the transmission chamber and are meshed in sequence, wherein, The first end of the multi-stage transmission mechanism (4) is the first-stage transmission gear (41), and the first-stage transmission gear (41) is coaxially connected with one end of the rotating rod (33) located in the frame (1); The second end of the multi-stage transmission mechanism (4) is the second-stage transmission gear (42), and the second-stage transmission gear (42) is in transmission connection with the power generation mechanism (5) through the overload protection mechanism (6).

5. The intelligent tail water power generation device adopting a hierarchical power generation method according to claim 4, characterized in that, The power generation mechanism (5) includes a generator (51), a cable (52) and a collector box (53). The generator (51) and the collector wire are both installed on the frame (1). The generator (51) is electrically connected to the collector box (53) through the cable (52). The output shaft of the generator (51) extends into the transmission chamber, and the output shaft of the generator (51) is drivingly connected to the secondary transmission gear (42) through an overload protection mechanism (6).

6. The intelligent tail water power generation device adopting a hierarchical power generation method according to claim 5, characterized in that, The overload protection mechanism (6) includes a protection gear (61), a first pressing annular disc (62) and a pressing component (63), where the protection gear (61) is rotatably arranged in the transmission chamber and meshes with the secondary transmission gear (42); an axial transmission groove is formed in the protection gear (61). The first pressing annular disc (62) is connected to the inner wall of the transmission groove. The output shaft of the generator (51) is configured to axially extend into the transmission groove and pass through the inner ring of the first pressing annular disc (62). A second pressing annular disc (511) is arranged on the output shaft of the generator (51). The second pressing annular disc (511) axially abuts against the first pressing annular disc (62) to form a friction drive structure; the pressing component (63) is arranged in the transmission groove and is used to apply an axial pre-tightening force acting on the first pressing annular disc (62) to the second pressing annular disc (511); When the tail water flow in the pipe body (2) exceeds the load flow and makes the rotational force of the protection gear (61) greater than the frictional force between the first pressing annular disc (62) and the second pressing annular disc (511), the first pressing annular disc (62) and the second pressing annular disc (511) rotate relative to each other to disconnect the drive connection between the multi-stage transmission mechanism (4) and the power generation mechanism (5).

7. An intelligent tail water power generation device adopting a hierarchical power generation method according to claim 6, characterized in that, Two second pressing annular discs (511) are axially spaced on the output shaft of the generator (51). The two second pressing annular discs (511) axially abut against the upper surface and the lower surface of the first pressing annular disc (62) respectively.

8. An intelligent tail water power generation device adopting a hierarchical power generation method according to claim 6, characterized in that, The pressing component (63) includes a pressing cylinder (631), a pressing rod (632), a ball (633) and a compression spring (634). The pressing cylinder (631) is axially arranged on the inner end wall of the transmission chamber. The pressing rod (632) is slidably inserted into the pressing cylinder (631). The ball (633) is rotatably embedded at the end of the pressing rod (632) away from the pressing cylinder (631). An annular rolling groove is formed on the surface of the second pressing annular disc (511). The ball (633) is in rolling cooperation with the annular rolling groove. The compression spring (634) is arranged between the pressing cylinder (631) and the pressing rod (632) and always has a tendency to push the pressing rod (632) out of the pressing cylinder (631) to make the second pressing annular disc (511) abut against the first pressing annular disc (62).

9. An intelligent tail water power generation device adopting a hierarchical power generation method according to claim 8, characterized in that, The surface of the output shaft of the generator (51) is axially provided with an anti-rotation groove (512). An anti-rotation block (5111) is radially provided on the inner ring of the second abutting annular disc (511). The anti-rotation block (5111) axially slides in the anti-rotation groove (512), and the thickness of the anti-rotation block (5111) is less than the length of the moving groove.

10. An intelligent tail water power generation device adopting a hierarchical power generation method according to any one of claims 5-9, characterized in that, It further includes a cooling mechanism (7). The cooling mechanism (7) is arranged on the frame (1) and is used for automatically cooling the generator (51) when the secondary transmission gear (42) rotates. The cooling mechanism (7) includes a cooling pipe (71), a water-blocking circular plate (72), a rotating rod (73) and a torsion spring (74). Among them, The cooling pipe (71) includes an inclined pipe (711) and a horizontal straight pipe (712) that are connected and communicate with each other. The highest end of the inclination of the inclined pipe (711) communicates with the pipe body (2), and the lowest end communicates with the horizontal straight pipe (712). A part of the horizontal straight pipe (712) is attached to the surface of the generator (51) and then communicates with the water discharge area. The water-blocking circular plate (72) is rotatably arranged in the horizontal straight pipe (712), and the shape of the plate surface of the water-blocking circular plate (72) is adapted to the cross-sectional shape of the horizontal straight pipe (712). The rotating rod (73) is coaxially arranged at the edge of the water-blocking circular plate (72) and extends vertically downward outside the horizontal straight pipe (712). The torsion spring (74) is arranged between the rotating rod (73) and the outer wall of the horizontal straight pipe (712), and the torsion spring (74) always has a tendency to push the water-blocking circular plate (72) to a position facing the horizontal straight pipe (712). A driving rod (421) is coaxially arranged on the secondary transmission gear (42). The driving rod (421) extends vertically upward. A flapping piece (422) is arranged on the rod wall near the top of the driving rod (421). A fitting piece (731) is arranged on the rod wall near the bottom of the rotating rod (73). The flapping piece (422) can be attached to the fitting piece (731) and push the rotating rod (73) to rotate against the torsion of the torsion spring (74) during the rotation of the driving rod (421).

Images