Accurate silt flushing transmission mechanism
By designing a precise scouring and silting transmission mechanism and using servo motors and sonar sensors to achieve three-degree-of-freedom movement and fixed-point scouring and silting, the problem that existing dredging devices cannot effectively clean the sediments in the corners of the well bottom and that fixed pipes are easily damaged has been solved, improving the Improve the dredging accuracy and quality.
Patent Information
- Application Number
- CN202421171375.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The existing hydropower station silting equipment cannot effectively flush out sediment from the corners of the well bottom corners or far away areas, and the fixed silting pipeline is easily damaged by rust and damage, which is difficult to maintain, and long-term use causes damage to the bottom structure.
Design a precise scouring and silting transmission mechanism, including Y-axis, X-axis and Z-axis servo motor drive gearboxes and servo transmission mechanisms, combined with sonar sensors and scouring and silting pipelines, to achieve three degrees of freedom movement and fixed-point scouring and silting.
It achieves precise and automated cleaning of sediments in wells of hydropower stations, improves the accuracy and quality of scouring and silting, and avoids the uncertainty of manual scouring and silting and the maintenance difficulties of fixed pipelines.
Smart Images
Figure CN222390615U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silt removal in hydropower stations, in particular to a precise silt flushing transmission mechanism. Background Art
[0002] Hydropower stations usually have seepage wells and maintenance wells at different elevations in the dam and powerhouse to collect dam seepage, unit leakage, and maintenance drainage. The water collected in the well contains a variety of debris, which will accumulate at the bottom of the well over time, reducing the capacity of the well, and the sediment in the well needs to be cleaned regularly.
[0003] In order to clean the sediment in the well, the main cleaning method currently used is to install a fixed silt flushing pipe in the water collection well, one end of the pipe is located at the bottom of the water collection well, and the other end is connected to a high-pressure air pipe or a high-pressure water pipe. When silt flushing is required, the valve of the high-pressure air pipe or high-pressure water pipe is opened, and after a certain period of time, the submersible sewage pump is started to discharge the accumulated water and sediment from the water collection well.
[0004] The problems with the sediment cleaning devices currently used are:
[0005] (1) Fixed flushing and silting pipes cannot effectively flush out sediments in all areas of the well bottom, especially in corners or areas far away. Long-term accumulation will form fan-shaped deposits at the bottom of the well, reducing the capacity of the collection well.
[0006] (2) Fixed flushing and silting pipes are immersed in water for a long time, which will inevitably cause rust and damage, making maintenance difficult and the repair cost high.
[0007] (3) High-pressure airflow or water flow continuously scours and silts fixed locations at the bottom of the well. Long-term accumulation will damage the structural integrity of the bottom of the well. Utility Model Content
[0008] In order to solve the current technical problems, the main purpose of the utility model is to provide a precise flushing and silting transmission mechanism, which can be used for sediment cleaning of different types of wells in hydropower stations, can realize automatic flushing and silting, replace the traditional manual flushing and silting process, and improve the flushing and silting accuracy and quality.
[0009] In order to realize the above-mentioned technical features, the purpose of the utility model is realized as follows: a precise silt flushing and silting transmission mechanism, comprising a Y-axis movable guide rail symmetrically installed on the inner wall of a sump, a Y-axis driving gear box being installed on the Y-axis movable guide rail, and a Y-axis servo motor for providing walking power being installed on the Y-axis driving gear box; an X-axis movable guide rail is installed between two sets of Y-axis driving gear boxes, the X-axis movable guide rail spans directly above the sump, an X-axis driving gear box is installed on the X-axis movable guide rail, an X-axis servo motor for providing walking power is installed on the X-axis driving gear box, and a Z-axis servo transmission mechanism is installed on the outer wall of the X-axis driving gear box; a sonar sensor and a silt flushing and silting pipeline are installed on the Z-axis servo transmission mechanism.
[0010] The Z-axis servo transmission mechanism includes a Z-axis frame, which is fixed on the outer side wall of the X-axis driving gear box. A Z-axis screw is rotatably installed between the Z-axis frames. A Z-axis screw nut is installed on the Z-axis screw through screw transmission. The top of the Z-axis screw is connected to the output shaft of the Z-axis servo motor used to drive the Z-axis screw to rotate.
[0011] The sonar sensor and the silt flushing pipeline are fixed on the Z-axis screw nut through a connecting plate;
[0012] The upper end of the flushing and silting pipeline is connected to the flushing and silting valve through a high-pressure hose.
[0013] All servo motor power supplies, control signals, and position feedback signals of the Y-axis servo motor, X-axis servo motor, and Z-axis servo motor are connected to an external control box. The controller in the external control box detects the position feedback signal of the servo motor in real time, and controls the forward and reverse rotation, speed, and position of the servo motor through a closed loop, thereby driving the sonar sensor and the silt flushing pipeline to achieve free movement in the three directions of X, Y, and Z.
[0014] The sonar sensor is connected to the controller via a signal line and transmits scanning data back to the controller.
[0015] The utility model has the following beneficial effects:
[0016] 1. The utility model mechanism can be used for cleaning sediments in different types of wells in hydropower stations, can realize automatic silt flushing, replace the traditional manual silt flushing process, and improve the silt flushing accuracy and quality.
[0017] 2. The utility model can drive the Y-axis drive gearbox to move along the Y-axis moving guide rail through the Y-axis servo motor, thereby realizing the walking movement of the entire transmission mechanism in the Y direction, can drive the X-axis drive gearbox to move along the X-axis moving guide rail through the X-axis servo motor, thereby realizing the walking movement of the entire transmission mechanism in the X direction, and can drive the entire transmission mechanism to move in the Z direction through the Z-axis servo transmission mechanism. The sonar sensor can be used to scan the surface of the sediment, and the silt flushing pipeline can be used to flush the sediment at a fixed point.
[0018] 3. The utility model can realize walking and moving in the Z direction through the above-mentioned Z-axis servo transmission mechanism.
[0019] 4. The utility model ensures reliable fixed installation of the sonar sensor and the flushing and silting pipeline through the above-mentioned connection method, and facilitates the subsequent replacement of the sonar sensor and the flushing and silting pipeline.
[0020] 5. The utility model can realize the flushing and silting operation of sediments through the above-mentioned flushing and silting pipeline, thereby realizing the cleaning of sediments.
[0021] 6. The utility model can realize the adjustment of three degrees of freedom by controlling the Y-axis servo motor, the X-axis servo motor and the Z-axis servo motor through the above-mentioned controller, thereby realizing the three-dimensional movement control of the sonar sensor and the flushing and silting pipeline.
[0022] 7. The utility model can obtain a three-dimensional topographic map of the sediment surface in advance by scanning through the above-mentioned sonar sensor, and draw a topographic map. By comparing the topographic map with the accumulation height alarm threshold plane, the sediment that needs to be cleaned is obtained, and then, through the controller, the transmission mechanism is controlled to drive the silt flushing pipe to move to the point where the silt needs to be flushed for precise silt flushing. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0024] Figure 1 It is a three-dimensional structural diagram of the transmission mechanism of the utility model.
[0025] Figure 2 It is a three-dimensional topographic diagram of the bottom of the water collection well during the flushing and silting process of the utility model.
[0026] In the figure: inner wall of the water collection well 1, Y-axis movable guide rail 2, Y-axis servo motor 3, Y-axis driving gear box 4, X-axis movable guide rail 5, X-axis servo motor 6, X-axis driving gear box 7, Z-axis servo motor 8, Z-axis screw rod 9, Z-axis screw rod nut 10, sonar sensor 11, and silt flushing pipeline 12. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0028] Embodiment 1:
[0029] See also Figure 1-2 A precise flushing and silting transmission mechanism includes a Y-axis movable guide rail 2 symmetrically mounted on the inner wall 1 of a water collection well, a Y-axis driving gear box 4 mounted on the Y-axis movable guide rail 2, and a Y-axis servo motor 3 for providing walking power mounted on the Y-axis driving gear box 4; an X-axis movable guide rail 5 is mounted between two groups of Y-axis driving gear boxes 4, the X-axis movable guide rail 5 spans directly above the water collection well, an X-axis driving gear box 7 is mounted on the X-axis movable guide rail 5, and an X-axis servo motor 6 for providing walking power is mounted on the X-axis driving gear box 7, and a Z-axis servo transmission mechanism is mounted on the outer wall of the X-axis driving gear box 7; a sonar sensor 11 and a flushing and silting pipeline 12 are mounted on the Z-axis servo transmission mechanism. This mechanism can be used for sediment cleaning of different types of wells in hydropower stations, can realize automatic flushing and silting, replace the traditional manual flushing and silting process, and improve the flushing and silting accuracy and quality. In the specific working process, the Y-axis servo motor 3 can drive the Y-axis driving gear box 4 to move along the Y-axis moving guide rail 2, thereby realizing the walking movement of the entire transmission mechanism in the Y direction, the X-axis servo motor 6 can drive the X-axis driving gear box 7 to move along the X-axis moving guide rail 5, thereby realizing the walking movement of the entire transmission mechanism in the X direction, and the Z-axis servo transmission mechanism can drive the entire transmission mechanism to move in the Z direction. The sonar sensor 11 can be used to scan the surface of the sediment, and the silt flushing pipeline 12 can be used to flush the sediment at a fixed point.
[0030] Furthermore, the Z-axis servo transmission mechanism includes a Z-axis frame, which is fixed on the outer wall of the X-axis driving gear box 7, and a Z-axis screw 9 is rotatably installed between the Z-axis frames, and a Z-axis screw nut 10 is installed on the Z-axis screw 9 through screw transmission, and the top of the Z-axis screw 9 is connected to the output shaft of the Z-axis servo motor 8 used to drive it to rotate. The Z-direction walking movement can be achieved through the above-mentioned Z-axis servo transmission mechanism. During the working process, the Z-axis screw 9 is driven by the Z-axis servo motor 8, and the Z-axis screw nut 10 is driven by the Z-axis screw 9, and then the sonar sensor 11 and the flushing and silting pipeline 12 are synchronously driven by the Z-axis screw nut 10 to achieve lifting and lowering movement.
[0031] Furthermore, the sonar sensor 11 and the silt flushing pipe 12 are fixed to the Z-axis screw nut 10 through a connecting plate. The above connection method ensures reliable fixed installation of the sonar sensor 11 and the silt flushing pipe 12, and facilitates subsequent replacement of the sonar sensor 11 and the silt flushing pipe 12.
[0032] Furthermore, the upper end of the silt flushing pipe 12 is connected to the silt flushing valve through a high-pressure hose. The silt flushing pipe 12 can be used to flush the sediment, thereby cleaning the sediment. During operation, high-pressure water is provided, and the high-pressure water enters the silt flushing pipe 12 through the high-pressure hose, and the sediment is cleaned at a fixed point through the silt flushing pipe 12.
[0033] Furthermore, all servo motor power supplies, control signals, and position feedback signals of the Y-axis servo motor 3, the X-axis servo motor 6, and the Z-axis servo motor 8 are connected to an external control box. The controller in the external control box detects the position feedback signal of the servo motor in real time, and controls the forward and reverse rotation, speed, and position of the servo motor through a closed loop, thereby driving the sonar sensor 11 and the flushing and silting pipeline 12 to achieve free movement in the three directions of X, Y, and Z. Through the above-mentioned controller, the three-degree-of-freedom adjustment can be achieved by controlling the Y-axis servo motor 3, the X-axis servo motor 6, and the Z-axis servo motor 8, thereby achieving three-dimensional movement control of the sonar sensor 11 and the flushing and silting pipeline 12.
[0034] Furthermore, the sonar sensor 11 is connected to the controller via a signal line and transmits the scan data back to the controller. The sonar sensor 11 can obtain a three-dimensional topographic map of the sediment surface by scanning in advance and draw a topographic map. By comparing the topographic map with the accumulation height alarm threshold plane, the sediment that needs to be cleaned is obtained. Then, the controller controls the transmission mechanism to drive the silt flushing pipeline 12 to move to the point where the silt needs to be flushed for accurate silt flushing. The precision and quality of silt clearing are effectively improved.
[0035] Embodiment 2:
[0036] Since the surface of the water collection well is usually large, the traditional manual indiscriminate silt flushing and dredging method increases the intensity of the work. Based on this, in this embodiment, with the help of a precise silt flushing and dredging transmission mechanism, the surface of the sediment is first scanned in three dimensions to obtain a surface topography map, and then the Y-axis servo motor 3, the X-axis servo motor 6 and the Z-axis servo motor 8 are feedback-controlled to move the silt flushing pipe 12 to the point where silt flushing is required. The purpose of silt flushing is achieved through a fixed-point operation method, the accuracy of silt flushing and dredging is improved, and the quality of silt flushing and dredging is guaranteed.
[0037] The control method for flushing and silting using the precise flushing and silting transmission mechanism comprises the following steps:
[0038] Step 1: The controller will scan the starting point coordinates Converted into a control signal, controlling the transmission mechanism to drive the sonar sensor 11 to move to the coordinate point ;
[0039] Step 2: According to the bottom area of the water collection well and the sonar scanning width, the scanning area is gridded, and the scanning path is planned with a constant width along the X-axis or Y-axis;
[0040] Step 3: The controller controls the transmission mechanism to move at a constant speed along the planned scanning path until the scanning of the specified area is completed;
[0041] Step 4: The controller processes the scanned data, calculates the area where the bottom well accumulation height exceeds the threshold, and determines the precise scouring and silting coordinate points , the controller controls the transmission mechanism to move to the precise flushing and silting coordinate points in sequence to flush the silt, and after flushing and silting, the submersible sewage pump is started to discharge sewage;
[0042] Step 5: After the sewage discharge is completed, scan the bottom of the well again to evaluate the sewage discharge effect and determine whether it is necessary to flush and discharge the sewage again until the sewage discharge requirements are met.
Claims
1. A precise flushing and silting transmission mechanism, characterized in that: The invention comprises a Y-axis movable guide rail (2) symmetrically mounted on the inner wall (1) of a water collection well, a Y-axis driving gear box (4) being mounted on the Y-axis movable guide rail (2), a Y-axis servo motor (3) for providing walking power being mounted on the Y-axis driving gear box (4); an X-axis movable guide rail (5) being mounted between two sets of Y-axis driving gear boxes (4), the X-axis movable guide rail (5) spanning directly above the water collection well, an X-axis driving gear box (7) being mounted on the X-axis movable guide rail (5), an X-axis servo motor (6) for providing walking power being mounted on the X-axis driving gear box (7), a Z-axis servo transmission mechanism being mounted on the outer wall of the X-axis driving gear box (7); and a sonar sensor (11) and a silt flushing pipe (12) being mounted on the Z-axis servo transmission mechanism.
2. According to claim 1, a precise silt flushing transmission mechanism is characterized in that: The Z-axis servo transmission mechanism comprises a Z-axis frame, the Z-axis frame being fixed on the outer side wall of the X-axis driving gear box (7), a Z-axis screw rod (9) being rotatably mounted between the Z-axis frames, a Z-axis screw rod nut (10) being mounted on the Z-axis screw rod (9) via screw rod transmission, and the top of the Z-axis screw rod (9) being connected to the output shaft of a Z-axis servo motor (8) for driving the Z-axis screw rod (9) to rotate.
3. According to claim 2, a precise silt flushing transmission mechanism is characterized in that: The sonar sensor (11) and the silt flushing pipe (12) are fixed on the Z-axis screw nut (10) via a connecting plate; The upper end of the silt flushing pipeline (12) is connected to the silt flushing valve via a high-pressure hose.
4. According to claim 3, a precise flushing and silting transmission mechanism is characterized in that: All servo motor power supplies, control signals, and position feedback signals of the Y-axis servo motor (3), the X-axis servo motor (6), and the Z-axis servo motor (8) are connected to an external control box. A controller in the external control box detects the position feedback signals of the servo motors in real time, and controls the forward and reverse rotation, speed, and position of the servo motors through a closed loop, thereby driving the sonar sensor (11) and the silting pipe (12) to achieve free movement in the three directions of X, Y, and Z.
5. According to claim 4, a precise flushing and silting transmission mechanism is characterized in that: The sonar sensor (11) is connected to the controller via a signal line, and transmits scanning data back to the controller.