Anti-blocking type pressure conduit of hydropower station

Abstract

This utility model discloses an anti-clogging hydropower station pressure pipeline, including a pressure pipeline body, a pre-filter device installed at the inlet end of the pressure pipeline, a rotary anti-clogging mechanism linked to the pre-filter device, and a power device driving the rotary anti-clogging mechanism. The rotary anti-clogging mechanism includes a rotating shaft penetrating the interior of the pre-filter device, a roller assembly for cleaning the grid holes fixed on the rotating shaft, and a scraper assembly for scraping off the inner wall deposits. By setting up a rotary anti-clogging mechanism, in which the protrusion of the roller assembly is inserted into the grid holes, the roller can specifically clean the blockages inside the grid holes as it rotates with the rotating shaft and rotates on its own axis, solving the problem that traditional scraper structures are difficult to remove blockages inside the grid holes. At the same time, the scraper assembly can scrape off the deposits on the inner wall of the pre-filter device, achieving comprehensive cleaning of the grid surface and internal blockages, and greatly improving the anti-clogging effect.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure pipeline devices, specifically to an anti-clogging type pressure pipeline for hydropower stations. Background Technology

[0002] In the operation system of a hydropower station, the pressure pipeline is a crucial component connecting the reservoir, forebay, and turbine. Its main function is to safely and stably transport water with a certain head to the turbine, driving it to rotate and convert energy into electricity, which in turn drives the generator. Since hydropower stations primarily draw water from natural bodies of water, the flow often contains various impurities such as silt, aquatic plants, etc. If these impurities enter the pressure pipeline with the water flow, they can cause wear and corrosion to the inner wall of the pipeline and easily accumulate and blockage it. Therefore, to prevent impurities from entering the pressure pipeline, traditional hydropower station pressure pipelines typically have anti-clogging structures at the inlet end, with the grid structure being the most widely used.

[0003] Traditional pressure pipeline anti-clogging structures typically consist of a screen installed at the water inlet. The screen surface has several perforations, which intercept impurities larger than the pore size, thus achieving initial filtration of the water flow. To prevent the screen surface and perforations from becoming clogged by impurities, some traditional anti-clogging structures are equipped with a scraper cleaning device. A drive mechanism moves the scraper back and forth or rotates on the screen surface to remove mud, weeds, and other impurities adhering to it.

[0004] However, traditional bar screen structures have significant limitations in their anti-clogging and unclogging effects in practical applications. Specifically, while traditional scraper structures can remove impurities adhering to the bar screen surface to some extent, they are ineffective at removing fine particles and fibrous materials clogging the inside of the bar screen openings because the scraper cannot penetrate deep into the openings. As operating time increases, blockages gradually accumulate inside the bar screen openings, leading to a decrease in the bar screen's flow capacity and consequently affecting the water conveyance efficiency of the pressure pipeline. Utility Model Content

[0005] (I) Technical Issues

[0006] This utility model provides an anti-clogging hydropower station pressure pipeline to effectively remove blockages inside the grid holes of the pre-filter device and improve the anti-clogging and unclogging effect.

[0007] (II) Technical Content

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a clog-resistant hydropower station pressure pipeline, comprising a pressure pipeline body, a pre-filter device installed at the inlet of the pressure pipeline, a rotary anti-clogging mechanism linked with the pre-filter device, and a power unit driving the rotary anti-clogging mechanism. The pre-filter device is a cylindrical grid structure with several grid holes on its surface. The pre-filter device is sealed to the inlet of the pressure pipeline body through a flange. The rotary anti-clogging mechanism includes a rotating shaft penetrating the interior of the pre-filter device. Both ends of the rotating shaft are fixed to the interior of the pre-filter device through bearing seats. A roller assembly for cleaning the grid holes and a scraper assembly for scraping off the inner wall deposits are fixed on the rotating shaft. The power unit is driven and connected to the rotating shaft.

[0009] Furthermore, the pre-filter has a drain channel at the bottom and a drain valve at its end.

[0010] Furthermore, the scraper assembly includes a scraper welded onto the rotating shaft, the blade curvature of which matches the curvature of the inner wall of the pre-filter.

[0011] Furthermore, the roller assembly includes a U-shaped bracket fixed on the rotating shaft, a roller rotatably mounted on the U-shaped bracket, and a number of protrusions fixed on the surface of the roller, each protrusion corresponding to a grid hole on the side of the pre-filter device.

[0012] Furthermore, the power unit is a waterproof motor and is fixedly installed on the side of the pre-filter device.

[0013] (III) Technical Effects

[0014] Compared with existing technologies, this invention has the following advantages: By setting a rotary anti-clogging mechanism, the protrusions of the roller assembly are engaged in the grid holes. As the rollers rotate with the shaft and on their own axis, they can specifically clean the blockages inside the grid holes, solving the problem that traditional scraper structures are unable to remove blockages from the grid holes. At the same time, the scraper assembly can scrape off the deposits on the inner wall of the pre-filter, achieving comprehensive cleaning of the grid surface and internal blockages, significantly improving the unclogging effect. Frequent manual cleaning downtime is eliminated; the power unit drives the rotary anti-clogging mechanism to automatically complete the unclogging operation, reducing the workload of manual maintenance and downtime. The drain channel and drain valve at the bottom of the pre-filter can promptly discharge the deposits scraped off by the scraper. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a clog-resistant pressure pipeline for a hydropower station, according to this utility model. Figure 1 .

[0016] Figure 2 This is a three-dimensional structural diagram of a clog-resistant pressure pipeline for a hydropower station, according to this utility model. Figure 2 .

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of a clog-resistant pressure pipeline for a hydropower station according to this utility model. Figure 1 .

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of a clog-resistant pressure pipeline for a hydropower station according to this utility model. Figure 2 .

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of a clog-resistant pressure pipeline for a hydropower station according to this utility model. Figure 3 .

[0020] As shown in the figure: 1. Pressure pipeline body; 2. Pre-filter device; 3. Rotary anti-clogging mechanism; 4. Power unit; 5. Sewage discharge channel; 6. Bearing seat; 8. Sewage valve; 9. Scraper; 10. U-shaped bracket; 11. Roller; 12. Protrusion; 21. Grille hole; 31. Rotating shaft. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] Combined with appendix Figure 1 To be continued Figure 5A clog-resistant hydropower station pressure pipeline includes a pressure pipeline body 1, a pre-filter 2 installed at the inlet of the pressure pipeline, a rotary anti-clogging mechanism 3 linked to the pre-filter, and a power unit 4 driving the rotary anti-clogging mechanism. The pre-filter 2 is a cylindrical grid structure with several grid holes 21 on its surface. The pre-filter 2 is sealed to the inlet of the pressure pipeline body 1 through a flange. The rotary anti-clogging mechanism 3 includes a rotating shaft 31 penetrating the interior of the pre-filter 2. Both ends of the rotating shaft 31 are fixed to the interior of the pre-filter 2 through bearing seats 6. A roller assembly for cleaning the grid holes and a scraper assembly for scraping off the inner wall deposits are fixed on the rotating shaft 31. The power unit 4 is driven by the rotating shaft 31.

[0025] The power unit 4 is a waterproof motor and is fixedly installed on the side of the pre-filter 2. The bottom of the pre-filter 2 is provided with a sewage discharge channel 5 and a sewage discharge valve 8 at its end.

[0026] The scraper assembly includes a scraper 9 welded onto the rotating shaft 31. The blade curvature of the scraper 9 matches the curvature of the inner wall of the pre-filter device 2. The roller assembly includes a U-shaped bracket 10 fixedly mounted on the rotating shaft 31. A roller 11 is rotatably mounted on the U-shaped bracket 10. Several protrusions 12 are fixedly mounted on the surface of the roller 11. The protrusions 12 correspond one-to-one with the grid holes on the side of the pre-filter device 2.

[0027] The working principle of this utility model is as follows: When the hydropower station pressure pipeline system is running, the water flow first enters the pre-filter device 2. Its cylindrical grid structure intercepts impurities in the water flow through the grid holes 21 on the surface. The filtered water flow is then transported to the subsequent equipment through the pressure pipeline body 1. During the anti-clogging and unclogging process, the power device 4 (waterproof motor) is started. The motor drives the rotating shaft 31 to rotate. The rotating shaft 31 is stably supported inside the pre-filter device 2 by the bearing seats 6 at both ends. As the rotating shaft 31 rotates, it drives the scraper assembly and roller assembly to operate synchronously: the scraper 9 in the scraper assembly, whose curvature matches that of the inner wall of the pre-filter device 2, rotates close to the inner wall, scraping away impurities attached to the inner wall; at the same time, the U-shaped bracket 10 of the roller assembly rotates with the rotating shaft 31, driving the roller 11 to roll on the inner wall of the pre-filter device 2. The protrusions 12 on the surface of the roller 11 correspond one-to-one with the grid holes 21 and are engaged in the holes. The roller 11 rotates with the bracket while rotating under the limitation of the grid holes 21. The protrusions 12 pass through the grid holes 21 one by one, thoroughly cleaning out the blockages in the holes. The impurities cleaned by the scraper settle to the bottom of the pre-filter device 2. By opening the drain valve 8 at the end of the drain channel 5, these impurities can be discharged in time to avoid secondary blockage, thereby continuously ensuring the filtration and flow capacity of the pre-filter device 2.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A clog-resistant hydropower station pressure pipeline, comprising a pressure pipeline body (1), a pre-filter (2) installed at the inlet end of the pressure pipeline, a rotary anti-clogging mechanism (3) linked to the pre-filter, and a power unit (4) driving the rotary anti-clogging mechanism, characterized in that: The pre-filter (2) is a cylindrical grid structure with several grid holes (21) on its surface. The pre-filter (2) is sealed to the inlet of the pressure pipeline body (1) through a flange. The rotary anti-clogging mechanism (3) includes a rotating shaft (31) that passes through the interior of the pre-filter (2). Both ends of the rotating shaft (31) are fixed inside the pre-filter (2) through bearing seats (6). The rotating shaft (31) is fixed with a roller assembly for cleaning the grid holes and a scraper assembly for scraping off the inner wall deposits. The power unit (4) is driven by the rotating shaft (31).

2. The anti-clogging hydropower station pressure pipeline according to claim 1, characterized in that: The pre-filter (2) has a drain channel (5) at the bottom and a drain valve (8) at the end.

3. The anti-clogging hydropower station pressure pipeline according to claim 1, characterized in that: The scraper assembly includes a scraper (9) welded onto a rotating shaft (31), the blade curvature of which matches the curvature of the inner wall of the pre-filter (2).

4. The anti-clogging hydropower station pressure pipeline according to claim 1, characterized in that: The roller assembly includes a U-shaped bracket (10) fixed on the rotating shaft (31), a roller (11) is rotatably mounted on the U-shaped bracket (10), and a number of protrusions (12) are fixedly mounted on the surface of the roller (11), with the protrusions (12) corresponding one-to-one with the grid holes on the side of the pre-filter device (2).

5. A clog-resistant hydropower station pressure pipeline according to claim 1, characterized in that: The power unit (4) is a waterproof motor and is fixedly installed on the side of the pre-filter (2).

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