Corrosion-resistant mixed-flow water turbine

Abstract

The utility model relates to the technical field of water turbines, in particular to a corrosion-resistant mixed-flow water turbine which comprises a volute, a water turbine body and a shell, a gravel filtering assembly is arranged in the shell and comprises a cleaning rod and a filtering net plate, one end of the cleaning rod is provided with a cleaning brush, and the other end of the cleaning rod is provided with a filtering net plate. One end of the cleaning brush makes contact with the surface of one end of the filter screen plate, when water flow passes through the filter screen plate through the gravel filtering assembly, impurities such as gravel in the water flow are filtered and intercepted when passing through the filter screen plate in the shell, and the gravel can be prevented from entering the water turbine body and the volute; the water turbine has the advantages that abrasion and damage to corrosion-resistant protective layers in the water turbine body and the volute caused by impurities such as sand are avoided, impurities on the surface of the filter screen plate can be cleaned in time through the cleaning rod and the cleaning brush, blockage of the filter screen plate is avoided, smooth passing of water flow is guaranteed, and efficient operation of the water turbine is maintained.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, specifically a corrosion-resistant mixed-flow water turbine. Background Technology

[0002] Mixed-flow turbines are common hydroelectric power generation equipment, typically used in small to medium-sized hydroelectric power stations. Water enters through the spiral casing, its flow rate and direction are adjusted by guide vanes, and it enters the runner for energy conversion before finally flowing out through the outlet. As a core piece of equipment in hydroelectric power stations, mixed-flow turbines face numerous severe challenges during operation. Many hydroelectric power stations are located in areas with complex water conditions, containing large amounts of silt, dissolved oxygen, chloride ions, and various acidic or alkaline substances. Protective layers are added to key components such as the spiral casing, guide vanes, and runner, using a thermal spraying process to coat the surfaces with metals such as zinc and aluminum. Zinc and aluminum have excellent corrosion resistance.

[0003] However, in the use of existing equipment, many aquatic environments are complex, and the water flow often contains corrosive substances and particulate impurities such as sand and gravel. Most existing water turbines are equipped with corrosion-resistant protective layers, such as corrosion-resistant protective layers on the volute, guide vanes, and runner. Multiple composite protective layers are set on the surface of the volute, guide vanes, and runner. The innermost layer is a metal base layer, the middle layer is a corrosion-resistant ceramic coating, and the ceramic powder is evenly sprayed onto the metal base layer through a thermal spraying process to form a tightly bonded ceramic protective layer. The outermost layer is an organic polymer corrosion-resistant coating, using materials such as fluorocarbon coatings.

[0004] However, under the long-term scouring of water containing sand and gravel, the volute, guide vanes, and runner protective layer may be damaged during long-term operation. Once the protective layer is damaged, the metal parts of the turbine will come into direct contact with the corrosive water flow, which will not only accelerate the corrosion and damage of the parts, but also reduce the performance and efficiency of the turbine. Utility Model Content

[0005] The purpose of this invention is to provide a corrosion-resistant mixed-flow turbine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant mixed-flow turbine, comprising a volute, a turbine body, and an outer shell. A sand and gravel filter assembly is disposed inside the outer shell. The sand and gravel filter assembly includes a cleaning rod and a filter screen. A cleaning brush is disposed at one end of the cleaning rod, and one end of the cleaning brush contacts one end surface of the filter screen. A rotating rod is fixedly connected to one end of the cleaning rod. A first bevel gear is fixedly connected to the outer side of the rotating rod. A second bevel gear is meshed with the outer side of the first bevel gear. A rotating shaft is fixedly connected to one end of the second bevel gear, and a servo motor is fixedly connected to one end of the rotating shaft.

[0007] As a further preferred embodiment of this technical solution, one end of the rotating rod is rotatably connected to a fixed rod, and the fixed rod is disposed inside the outer casing.

[0008] As a further preferred embodiment of this technical solution, the upper end of the outer shell is fixedly connected to one end of the volute, and the turbine body is provided on the inner side of the volute.

[0009] As a further preferred embodiment of this technical solution, a pre-fixing component is provided at the lower end of the outer shell. The pre-fixing component includes a water inlet pipe and a connecting plate. A first fixing block is fixedly connected to the outer side of the connecting plate, and a slot is provided inside the first fixing block.

[0010] As a further preferred embodiment of this technical solution, a plug rod is inserted into the slot, and a second fixing block is fixedly installed at one end of the plug rod. The second fixing block is fixedly connected to the outside of the water inlet pipe.

[0011] As a further preferred embodiment of this technical solution, the insertion rod is fixedly connected to the inside of the slot by a fixing bolt.

[0012] This utility model provides a corrosion-resistant mixed-flow turbine, which has the following beneficial effects:

[0013] (1) This utility model uses a sand and gravel filtration component. When water flows through the filter screen, impurities such as sand and gravel in the water flow are filtered and intercepted when passing through the filter screen inside the outer shell. This can prevent sand and gravel from entering the turbine body and the inside of the volute. It avoids wear and damage to the corrosion-resistant protective layer inside the turbine body and the volute caused by sand and gravel and other impurities. Through the cleaning rod and cleaning brush, impurities on the surface of the filter screen can be cleaned in time, avoiding clogging of the filter screen and ensuring smooth water flow, thereby maintaining the efficient operation of the turbine.

[0014] (2) The present invention makes the installation process of the water inlet pipe and the turbine housing more convenient and quick by pre-fixing components. Through the cooperation of the plug and the slot, the initial positioning of the two can be quickly achieved, reducing the adjustment time and difficulty in the installation process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the sand and gravel filter assembly of this utility model;

[0017] Figure 3 This is a schematic diagram of the cleaning brush and filter screen structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the bevel gear, rotating rod, and rotating shaft structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the second fixing block and insert rod structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the second fixing block and insert rod structure of this utility model.

[0021] In the diagram: 1. Volute; 2. Turbine body; 3. Outer shell; 301. Fixing rod; 4. Pre-fixing assembly; 401. Inlet pipe; 402. Connecting plate; 403. First fixing block; 404. Slot; 405. Second fixing block; 406. Insert rod; 407. Fixing bolt; 5. Sand and gravel filter assembly; 501. Cleaning rod; 502. Filter screen; 504. Cleaning brush; 505. Rotating rod; 506. First bevel gear; 507. Second bevel gear; 508. Rotating shaft; 509. Servo motor. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model provides a technical solution: such as Figures 1 to 5 As shown in this embodiment, a corrosion-resistant mixed-flow turbine includes a volute 1, a turbine body 2, and an outer shell 3. A sand and gravel filter assembly 5 is installed inside the outer shell 3. The sand and gravel filter assembly 5 includes a cleaning rod 501 and a filter screen 502. One end of the cleaning rod 501 is provided with a cleaning brush 504, and one end of the cleaning brush 504 contacts one end surface of the filter screen 502. A rotating rod 505 is fixedly connected to one end of the cleaning rod 501. A first bevel gear 506 is fixedly connected to the outer side of the rotating rod 505. A second bevel gear 507 is meshed with the outer side of the first bevel gear 506. A rotating shaft 508 is fixedly connected to one end of the second bevel gear 507. A servo motor 509 is fixedly connected to one end of the rotating shaft 508. A fixed rod 301 is rotatably connected to one end of the rotating rod 505. The fixed rod 301 is located inside the outer shell 3.

[0024] Furthermore, the upper end of the outer shell 3 is fixedly connected to one end of the volute 1, and the turbine body 2 is provided on the inner side of the volute 1.

[0025] In this design, when the corrosion-resistant mixed-flow turbine starts operating, the water flow first enters the volute 1. During the water flow into the volute 1, a sand and gravel filter assembly 5 is installed inside the outer casing 3. When the water flows through the filter screen 502, impurities such as sand and gravel in the water flow are filtered and intercepted, preventing sand and gravel from entering the turbine body 2 and the volute 1. This avoids wear and damage to the corrosion-resistant protective layer inside the turbine body 2 and the volute 1 caused by sand and gravel and other impurities. Simultaneously, to prevent the filter screen 502 from intercepting sand and gravel impurities... When a blockage occurs, the servo motor 509 drives the rotating shaft 508 to rotate, which in turn drives the second bevel gear 507 to rotate. Since the second bevel gear 507 meshes with the first bevel gear 506, it drives the first bevel gear 506 to rotate, which in turn drives the rotating rod 505 to rotate. The rotating rod 505 causes the cleaning rod 501 to rotate, and the cleaning brush 504 cleans the surface of the filter screen 502, brushing off sand and other impurities. The multi-layer composite protective layer continuously protects the volute 1 and the turbine body 2, resisting the erosion of corrosive substances in the water flow.

[0026] In this embodiment, through the sand and gravel filtration component 5, when the water flows through the filter screen 502, the sand and gravel and other impurities in the water flow are filtered and intercepted when passing through the filter screen 502 inside the outer shell 3. This can prevent sand and gravel from entering the interior of the turbine body 2 and the volute 1, and avoid wear and damage to the corrosion-resistant protective layer inside the turbine body 2 and the volute 1 caused by sand and gravel and other impurities. Through the cleaning rod 501 and the cleaning brush 504, the impurities on the surface of the filter screen 502 can be cleaned in time, avoiding the clogging of the filter screen 502, ensuring the smooth flow of water, and thus maintaining the efficient operation of the turbine.

[0027] like Figure 1 , Figure 2 , Figure 6 As shown, a pre-fixing component 4 is provided at the lower end of the outer casing 3. The pre-fixing component 4 includes a water inlet pipe 401 and a connecting plate 402. A first fixing block 403 is fixedly connected to the outside of the connecting plate 402. A slot 404 is opened inside the first fixing block 403. A plug rod 406 is inserted and connected inside the slot 404. A second fixing block 405 is fixedly installed at one end of the plug rod 406. The second fixing block 405 is fixedly connected to the outside of the water inlet pipe 401. The plug rod 406 is fixedly connected to the inside of the slot 404 by a fixing bolt 407.

[0028] In this scheme, by moving the water inlet pipe 401 to the corresponding position of the connecting plate 402 at the lower end of the outer casing 3, the second fixing block 405 on the outside of the water inlet pipe 401 is aligned with the first fixing block 403 on the outside of the connecting plate 402. At the same time, the insertion rod 406 is aligned with the slot 404 and inserted into the slot 404 opened inside the first fixing block 403. At this time, the water inlet pipe 401 and the connecting plate 402 are initially connected together, realizing the initial positioning and pre-fixing of the two. The fixing bolt 407 is used to fix the insertion rod 406 inside the slot 404. The fixing bolt 407 prevents the insertion rod 406 from coming out of the slot 404, thereby making the water inlet pipe 401 and the connecting plate 402 firmly connected together, completing the pre-fixing operation of the turbine outer casing 3 and the water inlet pipe 401.

[0029] In this embodiment, the pre-fixed component 4 makes the installation process of the water inlet pipe 401 and the turbine housing 3 more convenient and faster. The cooperation between the plug rod 406 and the slot 404 can quickly achieve the initial positioning of the two, reducing the adjustment time and difficulty during the installation process.

[0030] This utility model provides a corrosion-resistant mixed-flow turbine, the specific working principle of which is as follows: When the corrosion-resistant mixed-flow turbine starts running, the water flow first flows into the volute 1. During the process of the water flow entering the volute 1, since the sand and gravel filter assembly 5 is set inside the outer shell 3, when the water flow passes through the filter screen 502, the sand and gravel and other impurities in the water flow are filtered and intercepted when passing through the filter screen 502 inside the outer shell 3. This can prevent sand and gravel from entering the interior of the turbine body 2 and the volute 1, and avoid wear and damage to the corrosion-resistant protective layer inside the turbine body 2 and the volute 1 caused by sand and gravel and other impurities. At the same time, to avoid the filter screen 5 02 When blockage occurs due to the interception of sand and gravel impurities, the servo motor 509 drives the rotating shaft 508 to rotate, which in turn drives the second bevel gear 507 to rotate. Since the second bevel gear 507 meshes with the first bevel gear 506, it drives the first bevel gear 506 to rotate, which in turn drives the rotating rod 505 to rotate. The rotating rod 505 causes the cleaning rod 501 to rotate, and the cleaning brush 504 cleans the surface of the filter screen 502, brushing off sand and gravel impurities. The multi-layer composite protective layer continuously protects the volute 1 and the turbine body 2, resisting the erosion of corrosive substances in the water flow.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant mixed-flow turbine, comprising a volute (1), a turbine body (2), and an outer casing (3), characterized in that: The housing (3) is equipped with a sand and gravel filter assembly (5). The sand and gravel filter assembly (5) includes a cleaning rod (501) and a filter screen (502). A cleaning brush (504) is provided at one end of the cleaning rod (501). One end of the cleaning brush (504) contacts one end surface of the filter screen (502). A rotating rod (505) is fixedly connected to one end of the cleaning rod (501). A first bevel gear (506) is fixedly connected to the outside of the rotating rod (505). A second bevel gear (507) is meshed with the outside of the first bevel gear (506). A rotating shaft (508) is fixedly connected to one end of the second bevel gear (507). A servo motor (509) is fixedly connected to one end of the rotating shaft (508).

2. The corrosion-resistant mixed-flow turbine according to claim 1, characterized in that: One end of the rotating rod (505) is rotatably connected to a fixed rod (301), and the fixed rod (301) is located inside the outer casing (3).

3. The corrosion-resistant mixed-flow turbine according to claim 2, characterized in that: The upper end of the outer shell (3) is fixedly connected to one end of the volute (1), and the turbine body (2) is provided on the inner side of the volute (1).

4. A corrosion-resistant mixed-flow turbine according to claim 3, characterized in that: The lower end of the outer shell (3) is provided with a pre-fixing component (4), which includes a water inlet pipe (401) and a connecting plate (402). A first fixing block (403) is fixedly connected to the outside of the connecting plate (402), and a slot (404) is provided inside the first fixing block (403).

5. A corrosion-resistant mixed-flow turbine according to claim 4, characterized in that: A plug rod (406) is inserted into the slot (404), and a second fixing block (405) is fixedly installed at one end of the plug rod (406). The second fixing block (405) is fixedly connected to the outside of the water inlet pipe (401).

6. A corrosion-resistant mixed-flow turbine according to claim 5, characterized in that: The insertion rod (406) is fixedly connected to the inside of the slot (404) by a fixing bolt (407).

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