Hydraulic screen cleaner

Abstract

This application relates to a hydraulic bar screen cleaner, comprising: a filter screen, a flushing pipe, a rotating pipe, and a swinging pipe. The filter screen extends along a first arc in its vertical cross-section; a first side of the filter screen is for the flow of water to be treated, and a second side faces a collection tank for holding the treated water. The flushing pipe is located on the second side of the filter screen and extends along a second arc, which is parallel to the first arc; the flushing pipe includes a flushing pipe body and a plurality of nozzles arranged along the second arc, with the nozzles spraying in the direction of the filter screen. The flushing pipe can rotate under the drive of a drive assembly. This hydraulic bar screen cleaner expands the application range of hydraulic bar screens and solves the problem of bar screen clogging in situations with high concentrations of adhesive sludge and in situations where sludge stagnates at low water flow rates.

Description

Technical Field

[0001] This application belongs to the field of water treatment technology, and in particular relates to a hydraulic bar screen cleaning machine. Background Technology

[0002] Hydraulic screens are commonly used devices that rely on water flowing downwards through inclined planes or curved surfaces to achieve filtration, interception of contaminants, and removal of sludge. Due to their simple structure and convenient maintenance, they are widely used in water supply and drainage pretreatment applications that meet the required conditions. However, existing hydraulic screens have the following shortcomings:

[0003] 1) The throughput per unit filtration area is much smaller compared to mechanical bar screens;

[0004] 2) Not suitable for use in situations where slag easily adheres and clogs the grid gaps;

[0005] 3) When the flow area is too large, the low flow velocity can cause screenings to accumulate and clog.

[0006] 4) If the flow area is too small, the processing capacity requirement cannot be met. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a hydraulic bar screen cleaning machine in order to overcome one of the above-mentioned shortcomings of the existing hydraulic bar screen.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A hydraulic bar screen cleaning machine, comprising:

[0010] A filter grid, the filter grid having a vertical cross-section extending along a first circular arc; a first side of the filter grid is for the water to be treated to flow through, and a second side faces a water collection tank for containing the treated water;

[0011] A flushing pipe is located on the second side of the filter grid and extends along a second arc, which is parallel to the first arc. The flushing pipe includes a flushing pipe body and a plurality of nozzles arranged along the second arc, with the spray direction of each nozzle facing the filter grid.

[0012] A rotating tube, the axis of which is parallel to the tangent at the midpoint of the first arc, is capable of rotating along its own axis under the drive of the drive assembly; the rotating tube is also connected to a water supply device for supplying backwash water.

[0013] A swing pipe, the two ends of which are respectively connected to the rotating pipe and the flushing pipe, so that the water supplied by the water supply device can enter the flushing pipe.

[0014] Preferably, in the hydraulic bar screen cleaning machine of this utility model, the lower end of the rotating tube is located inside the water collection chamber, and the upper end is located outside the water collection chamber;

[0015] The drive assembly includes a rocker arm and a cylinder. The cylinder is connected to the upper end of the rotating tube via the rocker arm. The cylinder drives the rocker arm to swing by extending and retracting, thereby causing the rotating tube to rotate.

[0016] Preferably, in the hydraulic bar screen cleaning machine of this utility model, the upper end of the rotating pipe is connected to a reducing bend via a static sealing flange assembly, and the other end of the reducing bend is connected to a flexible hose; the rocker arm is fixedly connected to one side of the flange assembly, the rocker arm is hinged to the piston rod end of the cylinder, and the main body of the cylinder is hinged to the fixed seat.

[0017] Preferably, in the hydraulic bar screen cleaning machine of this utility model, the standard stroke of the cylinder is exactly the same as the actual working stroke of the cylinder required for the back-and-forth swing of the flushing pipe. The cylinder is connected to a magnetic induction switch, which is used to send a signal to control the reversal of the cylinder when the flushing pipe or the rocker arm moves to the limit position.

[0018] Preferably, in the hydraulic bar screen cleaning machine of this utility model, the cylinder is controlled by a pneumatic control pipeline system, the pneumatic control pipeline system includes a throttle valve, the throttle valve is used to adjust the air intake of the cylinder to adjust the oscillation speed of the flushing pipe.

[0019] Preferably, in the hydraulic bar screen cleaner of this utility model, both the inlet and outlet ports of the cylinder are equipped with air pressure induction check valves.

[0020] Preferably, the hydraulic bar screen of this utility model includes:

[0021] The water inlet chamber is used to supply water to be treated; the outlet end of the water inlet chamber is connected to the top of the filter grid.

[0022] A water inlet sensor is installed on the top of the water inlet chamber to detect the water entering the water inlet chamber. The water inlet sensor is electrically connected to the water supply device to control the start or stop of the water supply device.

[0023] Preferably, the hydraulic bar screen cleaner of this utility model further includes a water distribution adjustment device, which includes an adjustment component and a first movable plate. A long strip-shaped water distribution port for water to flow through is formed between the first movable plate and the top of the filter screen. The adjustment component is used to adjust the distance between the first movable plate and the top of the filter screen to adjust the water flow rate.

[0024] Preferably, the hydraulic bar screen cleaner of this utility model further includes a water flow control device, which includes a gap adjustment component and a second movable plate. The space between the second movable plate and the middle of the filter screen forms a water storage tank, and there is a gap between the bottom of the second movable plate and the filter screen for water to flow through. The gap adjustment component is used to adjust the gap.

[0025] Preferably, the hydraulic bar screen cleaner of this utility model further includes a rotary bearing, which is installed at both ends of the rotating pipe, and the rotary bearing is made of water-lubricated ultra-high molecular weight polyethylene material.

[0026] The beneficial effects of this invention are as follows: the rinsing pipe is connected to the drive assembly via a rotating pipe and a swing pipe, thus enabling the rinsing pipe to rotate around the axis of the rotating pipe, achieving reciprocating movement relative to the filter grid and effectively rinsing the entire surface of the filter grid. The shape of the rinsing pipe matches the filter grid, ensuring that the distance between each nozzle on the rinsing pipe and the grid surface is small and changes minimal during the rotation of the rinsing pipe, guaranteeing uniform rinsing of the entire grid surface without blind spots.

[0027] Therefore, the hydraulic bar screen cleaner of this utility model is beneficial to expanding the application range of hydraulic bars. It can solve the problem of bar clogging in situations with high concentrations of adhesive residue and when residue is retained due to low water flow velocity. Attached Figure Description

[0028] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the longitudinal section of the hydraulic bar screen in an embodiment of this application;

[0030] Figure 2 This is a right view of the hydraulic bar screen structure according to an embodiment of this application;

[0031] Figure 3 This is a top view of the hydraulic bar screen structure according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the pneumatic control pipeline system of the cylinder according to an embodiment of this application.

[0033] The attached figures are labeled as follows:

[0034] 1. Water inlet chamber; 2. Flushing pipe; 3. Water inlet sensor; 4. Water distribution regulating device; 5. Cover plate; 6. Water flow control device; 7. Filter grid plate; 8. Swing pipe; 9. Rotary bearing; 10. Rotary pipe; 11. Frame; 12. Rocker arm; 13. Cylinder; 14. Control box; 15. Water collection chamber; 16. Flange assembly; 17. Variable diameter bend. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0036] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0039] This embodiment provides a hydraulic bar screen cleaning machine, such as Figure 1-3 As shown, it includes: a filter grid plate 7, a flushing pipe 2, a rotating pipe 10, and a swing pipe 8.

[0040] The filter grid 7 extends along the first arc in the vertical direction; the first side of the filter grid 7 is for the water to be treated to flow through, and the second side faces the water collection tank 15 for containing the treated water.

[0041] The flushing pipe 2 is located on the second side of the filter grid plate 7 and extends along the second arc, which is parallel to the first arc. The flushing pipe 2 includes a flushing pipe body and a number of nozzles arranged along the second arc, with the spray direction of the nozzles all facing the filter grid plate 7.

[0042] The axis of the rotating tube 10 is parallel to the tangent at the midpoint of the first arc, and the rotating tube 10 can rotate along its own axis under the drive of the drive assembly; the rotating tube 10 is also connected to a water supply device for supplying backwash water.

[0043] The two ends of the swing pipe 8 are connected to the rotating pipe 10 and the flushing pipe 2 respectively, so that the water supplied by the water supply device can enter the flushing pipe 2.

[0044] In this embodiment of the hydraulic bar screen cleaner, the flushing pipe 2 is connected to the drive assembly via the rotating pipe 10 and the swing pipe 8. Therefore, the flushing pipe 2 can rotate around the axis of the rotating pipe 10, realizing reciprocating movement relative to the filter screen 7, and effectively flushing the entire surface of the filter screen 7. The shape of the flushing pipe 2 matches the filter screen 7, which ensures that the distance between each nozzle on the flushing pipe 2 and the screen surface is small and changes little during the rotation of the flushing pipe 2, thus ensuring uniform flushing of the entire screen surface without blind spots.

[0045] Therefore, the hydraulic bar screen cleaner of this utility model is beneficial to expanding the application range of hydraulic bars. It can solve the problem of bar clogging in situations with high concentrations of adhesive residue and when residue is retained due to low water flow velocity.

[0046] In this embodiment of the hydraulic bar screen cleaner, the principle of the flushing pipe 2 for comprehensive backwashing is as follows: the rotating pipe 10 rotates along its own axis under the drive of the drive assembly, thereby driving the swing pipe 8 to rotate. The swing pipe 8 is fixed to the flushing pipe 2, realizing the rotation of the flushing pipe 2 around the axis of the rotating pipe 10. Figure 1 As shown, since the length of the swing tube 8 is long enough, the gap between the flushing tube 2 and the filter grid plate 7 does not change much on the moving path, but the span from one extreme position to the other extreme position in the horizontal direction is large, which can thoroughly flush the filter grid plate 7.

[0047] The hydraulic bar screen cleaning machine provided in this embodiment, such as Figure 1 As shown, the system also includes a frame 11, an inlet chamber 1, a slag discharge port, a water outlet, and a control box 14. The frame 11 is used to fix other components. The slag discharge port is located at the bottom of the filter screen 7 for particulate matter discharge. The water outlet is located at the bottom of the water collection chamber 15 for the discharge of treated water. The control box 14 is used to connect electrical components for power supply and control. The inlet chamber 1 is used to allow water to be treated to enter, and the outlet end of the inlet chamber 1 is connected to the top of the filter screen 7. In this embodiment, when the hydraulic bar screen cleaner treats water, water is introduced through the inlet chamber 1. When there is enough raw water in the inlet chamber 1, the raw water in the inlet chamber 1 flows downward. After filtration, the raw water falls from the second side of the filter screen 7 into the water collection chamber, and is collected by the water guide plate to the outlet of the screen and discharged outside the screen. The solids in the raw water are intercepted in front of the filter screen 7. Under the action of hydraulic propulsion and downward inertia, they slide down to the lower end of the filter screen 7, are collected by the guide plate, and are discharged to the screen outlet and then to the subsequent solids receiving conveyor.

[0048] Preferably, the hydraulic bar screen in this embodiment, such as Figure 1-3 As shown, the lower end of the rotating tube 10 is located inside the water collection tank 15, and the upper end is located outside the water collection tank 15. The driving assembly includes a rocker arm 12 and a cylinder 13. The cylinder 13 is connected to the upper end of the rotating tube 10 through the rocker arm 12. The cylinder 13 swings the rocker arm 12 via a telescopic belt, causing the rotating tube 10 to rotate. In this embodiment, by extending the upper end of the rotating tube 10 outside the water collection tank 15, it is easy to connect to the driving assembly. The driving assembly is isolated from the water flow and does not require waterproof protection. The rotating tube 10 is driven by the swinging of the rocker arm 12, resulting in a stable structure and easy control.

[0049] Preferably, in this embodiment of the hydraulic bar screen cleaner, the upper end of the rotating pipe 10 is connected to a reducing bend 17 via a statically sealed flange assembly 16, and the other end of the reducing bend 17 is connected to a flexible hose; a rocker arm 12 is fixedly connected to one side of the flange assembly 16, and the rocker arm is hinged to the piston rod end of the cylinder 13, the main body of the cylinder 13 being hinged to a fixed seat. In this embodiment, the design of connecting the flexible hose via the reducing bend 17 allows for a small rotation angle, requiring only a static seal in the inlet pipe structure, eliminating the need for a dynamic seal, thus reducing sealing requirements and minimizing the risk of leakage. In this embodiment, the flexible hose is only used on the exterior of the machine body, and there are no internal hoses requiring maintenance.

[0050] Preferably, in this embodiment of the hydraulic bar screen cleaner, the standard stroke of cylinder 13 is exactly the same as the actual working stroke of the cylinder required for the back-and-forth swing of the flushing pipe 2, such as... Figure 4 As shown, cylinder 13 is connected to a magnetic induction switch. The magnetic induction switch is used to send a signal to control the reversal of cylinder 13 when the flushing pipe 2 or rocker arm 12 moves to its limit position. In this embodiment, the magnetic induction switch physically limits the range of motion of the piston rod of cylinder 13, preventing the flushing pipe 2, swing pipe 8, rocker arm 12, and cylinder 13 from unexpectedly exceeding the predetermined range. For example, it ensures that the gap between the flushing pipe 2 and the inner end plate of the bar screen frame 11 is greater than 10mm when the flushing pipe 2 swings to its limit position, thus avoiding mechanical collision.

[0051] Preferably, the hydraulic bar screen in this embodiment, such as Figure 4 As shown, cylinder 13 is controlled by a pneumatic control pipeline system, which includes a throttle valve. The throttle valve is used to adjust the air intake of cylinder 13 to adjust the swing speed of flushing pipe 2 in order to find the most suitable working condition.

[0052] Preferably, the hydraulic bar screen in this embodiment, such as Figure 4 As shown, both the inlet and outlet ports of the cylinder 13 are equipped with air pressure induction check valves to ensure that the flushing pipe 2 stops and starts moving accurately without deviation.

[0053] Preferably, in combination with the above schemes, such as Figure 4 As shown, the pneumatic control system with a two-way lock helps ensure accurate and error-free stopping time and position of the flushing device, guaranteeing stable flushing effect at the end position. The pneumatic control system is equipped with a pneumatic inlet valve, an inlet water pressure transmitter, and an inlet air pressure transmitter, facilitating automatic on-site control of the bar screen flushing cycle and timely monitoring of inlet water and air pressure. Furthermore, when the inlet water or air pressure falls below the minimum operating pressure, an alarm signal is issued to prompt the user to take timely action, preventing abnormal operation of the bar screen and ensuring its safe and stable operation.

[0054] Preferably, the hydraulic bar screen in this embodiment, such as Figure 1 As shown, the hydraulic bar screen includes an inlet chamber 1 and an inlet sensor 3. The inlet chamber 1 is used to supply water to be treated; the outlet of the inlet chamber 1 is connected to the top of the filter screen 7; the inlet sensor 3 is installed on the top of the inlet chamber 1 to detect the water flowing into the inlet chamber 1. The inlet sensor 3 is electrically connected to the water supply device to control the start or stop of the water supply device. In this embodiment, the inlet sensor 3 can accurately sense the inlet and stop signals of the bar screen, and this signal can be used as a signal for on-site control of the backwash delay start.

[0055] Optionally, the water inlet sensor 3 is an electrode type, which uses electricity to trigger an electrical signal when in contact with water.

[0056] Preferably, the hydraulic bar screen cleaner of this embodiment further includes a water distribution regulating device 4. The water distribution regulating device 4 includes an regulating component and a first movable plate. A long strip-shaped water distribution port is formed between the first movable plate and the top of the filter screen 7, through which water flows. The regulating component is used to adjust the distance between the first movable plate and the top of the filter screen 7 to regulate the water flow rate and also to adjust the uniformity of water distribution. This facilitates the rational configuration of the initial flow state of the bar screen, balancing the movement of screen residue and achieving the optimal flow effect. The water distribution regulating device 4 helps to adjust the optimal inlet flow state to balance the flow and skimming function under different water quality and treatment volume conditions, which is beneficial for reducing the flushing frequency and saving air and water consumption.

[0057] Preferably, the hydraulic bar screen in this embodiment further includes a water flow control device 6. The water flow control device 6 includes a gap adjustment component and a second movable plate. The space between the second movable plate and the middle of the filter screen 7 forms a water storage tank. A gap exists between the bottom of the second movable plate and the filter screen 7 for water flow. The gap adjustment component is used to adjust the gap. In this embodiment, the gap can be adjusted to approximately 5mm to 10mm. Water flows normally through, while another portion overflows from the upper part of the second movable plate to the lower section of the screen (the lower half of the filter screen 7). Because the water depth on the screen surface is greater in the area of ​​the water storage tank, the flow rate through the screen is significantly increased. Also, due to the effect of the water storage tank, the water flow velocity below the middle of the filter screen 7 is slowed down, which helps to increase the flow rate below the middle of the filter screen 7, especially when the influent flow rate is large. This is beneficial for improving water flow capacity and reducing the moisture content of the discharged slag, significantly increasing the screen's processing capacity.

[0058] When the raw water flow rate provided by the inlet chamber 1 increases to exceed the processing capacity of a conventional hydraulic bar screen, the amount of raw water flowing before the filter screen 7 exceeds the filtration capacity. The excess water flows from the curved surface in front of the screen to the slag outlet and enters the slag receiving conveyor. Therefore, it is necessary to strictly limit the inlet water flow rate of the screen to not exceed the screen processing capacity and leave a safety margin. In this embodiment, the above problem can be effectively alleviated by setting a water flow control device 6. The water flow control device 6 blocks the excess water flow in the water storage tank formed by the second movable plate and the screen surface, slowing down the downward speed of the excess water flow and increasing the flow capacity of the screen surface downstream of the water flow control device. At the same time, due to the increased water depth in the water storage tank, the flow capacity of the screen plate at the water storage tank position increases several times. The combined effect of the above significantly increases the screen flow capacity and improves the screen processing capacity. Under the condition that the flow capacity does not exceed the screen processing capacity, the water flow control device 6 also helps to reduce the downward inertia of the water flow and reduce the moisture content of the slag.

[0059] As raw water begins to flow into the bar screen from the inlet, the water level in the upper part of the inlet chamber 1 rises to the weir, submerging the lower ends of the two stainless steel electrodes of the inlet sensor device 3. The local control box 14 immediately receives the signal and controls the inlet chamber 1 to receive water. The backwashing process timer starts, and the program controls the inlet pneumatic valve to open every T minutes (adjustable). Pressurized water enters the rotary pipe 10 and swing pipe 8 from the flushing inlet, then splits into two and enters the arc-shaped flushing pipe 2. The pressurized water is then sprayed at high speed from multiple sets of parallel, overlapping, knife-shaped water jets from each of the densely arranged nozzles on the flushing pipe into the gaps behind the curved filter screen 7. This removes the debris clogging the gaps and pushes it to the front of the screen, flowing down the screen surface to the slag outlet. After the inlet pneumatic valve is opened, the electromagnetic reversing valve of the control cylinder 13 operates with a delay. The cylinder piston rod extends and pushes the rocker arm 12 to rotate the rotating tube 10. This causes the swing tube 8 and the arc-shaped flushing tube 2 to move relative to the grid surface, achieving full-area scanning backwashing of the grid surface without blind spots. The flushing tube moves from one end of the grid to the other end and then reverses direction to return to the starting position. In each working cycle, the flushing tube completes 1 to 2 such back-and-forth movements—that is, the rotating tube completes 1 to 2 forward and reverse rotations, and the cylinder piston rod completes 1 to 2 full-stroke extension and retraction actions. Since the backwashing device inside the grid enclosure is made of 304 stainless steel, there are no easily damaged parts, reducing maintenance.

[0060] Preferably, the hydraulic bar screen cleaner of this embodiment also includes a rotary bearing 9, which is installed at both ends of the rotating tube 10. The rotary bearing 9 is made of water-lubricated ultra-high molecular weight polyethylene material, which has low frictional resistance and low operating energy consumption, which is conducive to ensuring the long-term stable rotation of the rotating tube 10.

[0061] Preferably, in this embodiment of the hydraulic bar screen cleaner, the swing pipe 8 is connected to the midpoint of the flushing pipe 2 and is cross-connected to the rotating pipe 10, so that the water supply in the flushing pipe 2 is uniform and the rotation transmission is smooth.

[0062] Preferably, in this embodiment of the hydraulic bar screen cleaner, the central ray of each nozzle of the flushing pipe 2 is always perpendicular to the grid surface of the filter screen 7, so as to ensure that the filter screen 7 is flushed along the shortest average path and reduce the water pressure requirement. Optionally, using a water pressure of 50m and a matching flow rate can ensure that the flow rate difference between the nozzles at the upper, middle and lower positions of the arc-shaped flushing pipe is less than 1%.

[0063] Preferably, in this embodiment, the hydraulic bar screen cleaner has flange-sealed connections for the inlet, outlet, and slag outlet. The filter screen 7 has a cover plate 5 in front, and the top of the bar screen cleaner has an exhaust flange for easy connection to a deodorization system. The entire filter screen 7 operates in a completely enclosed space, providing a friendly operating environment.

[0064] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hyd ro -screen cleaner characterized in that, include: The filter grid (7) has a vertical section that extends along a first circular arc; The first side of the filter screen (7) is for the water to be treated to flow through, and the second side faces the water collection tank (15) for holding the treated water. The flushing pipe (2) is located on the second side of the filter grid plate (7) and extends along the second arc, which is parallel to the first arc. The flushing pipe (2) includes a flushing pipe body and a plurality of nozzles arranged along the second arc, and the spraying direction of the nozzles is towards the filter grid plate (7). A rotating tube (10) has its axis parallel to the tangent at the midpoint of the first arc. The rotating tube (10) is able to rotate along its own axis under the drive of the drive assembly. The rotating tube (10) is also connected to a water supply device for supplying backwash water. The swing pipe (8) is connected at both ends to the rotating pipe (10) and the flushing pipe (2) respectively, so that the water supplied by the water supply device can enter the flushing pipe (2).

2. The hydropower screen rake according to claim 1, characterized in that The lower end of the rotating tube (10) is located inside the water collection tank (15), and the upper end is located outside the water collection tank (15); The drive assembly includes a rocker arm (12) and a cylinder (13). The cylinder (13) is connected to the upper end of the rotating tube (10) through the rocker arm (12). The cylinder (13) drives the rocker arm (12) to swing by extending and retracting, so as to rotate the rotating tube (10).

3. The hydropower screen rake according to claim 2, characterized in that The upper end of the rotating tube (10) is connected to the reducing bend (17) via a static sealing flange assembly (16), and the other end of the reducing bend (17) is connected to a hose; the rocker arm (12) is fixedly connected to one side of the flange assembly (16), the rocker arm is hinged to the piston rod end of the cylinder (13), and the main body of the cylinder (13) is hinged to the fixed seat.

4. The hydropower screen rake according to claim 2, characterized in that The standard stroke of the cylinder (13) is exactly the same as the actual working stroke of the cylinder required for the back-and-forth swing of the flushing pipe (2). The cylinder (13) is connected to a magnetic induction switch, which is used to send a signal to control the reversal of the cylinder (13) when the flushing pipe (2) or the rocker arm (12) moves to the limit position.

5. The hydropower screen rake according to claim 2, characterized in that The cylinder (13) is controlled by a pneumatic control pipeline system, which includes a throttle valve for adjusting the air intake of the cylinder (13) to adjust the oscillation speed of the flushing pipe (2).

6. The hydropower screen cleaner of claim 2, wherein, The cylinder (13) is equipped with air pressure induction check valves at both the inlet and outlet ports of its two chambers.

7. The hydropower screen cleaner of claim 1, wherein, The hydraulic bar screen cleaning machine includes: Water inlet chamber (1), which is used to supply water to be treated; the water outlet of the water inlet chamber (1) is connected to the top of the filter grid plate (7); A water inlet sensor (3) is installed on the top of the water inlet chamber (1) to detect the water entering the water inlet chamber (1). The water inlet sensor is electrically connected to the water supply device to control the water supply device to start or stop.

8. A hydromechanical bar screen according to any one of claims 1-7, characterized in that The hydraulic bar screen cleaner also includes a water distribution adjustment device (4), which includes an adjustment component and a first movable plate. A long strip-shaped water outlet is formed between the first movable plate and the top of the filter screen (7) to allow water to flow through. The adjustment component is used to adjust the distance between the first movable plate and the top of the filter screen (7) to adjust the water flow rate.

9. A hydromechanical bar screen according to any one of claims 1-7, characterized in that The hydraulic bar screen cleaner also includes a water flow control device (6), which includes a gap adjustment component and a second movable plate. The space between the second movable plate and the middle of the filter screen (7) forms a water storage tank. There is a gap between the bottom of the second movable plate and the filter screen (7) for water to flow through. The gap adjustment component is used to adjust the gap.

10. The hydraulic bar screen cleaner according to any one of claims 1-7, characterized in that, The hydraulic bar screen cleaner also includes a rotary bearing (9), which is installed at both ends of the rotary tube (10). The rotary bearing (9) is made of water-lubricated ultra-high molecular weight polyethylene material.

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