Automatic flushing device for plate-type filter screen at inlet of circulating water pump of thermal power plant

Abstract

The utility model relates to a thermal power plant circulating water pump inlet plate type filter screen automatic flushing device which comprises a rail extending front and back and a moving trolley arranged on the rail and walking along the rail, a water pump is arranged on the moving trolley and connected with a power device driving the water pump, and the liquid inlet end of the water pump is connected with a liquid pumping pipe. The liquid pumping pipe is provided with a liquid inlet pipe section which extends out of the moving trolley and can rotate up and down, a lifting mechanism connected with the liquid inlet pipe section is erected above the moving trolley, a plurality of nozzles arranged in a row in the length direction of the track are arranged above the moving trolley, and a driving assembly connected with the nozzles is arranged on the moving trolley. The driving assembly is used for driving the multiple nozzles to swing up and down and back and forth in a reciprocating mode, the spraying direction of the nozzles faces one side of the moving trolley, and the liquid outlet end of the water pump is connected with the multiple nozzles through pipelines. The filter screen cleaning device has the advantages of being reasonable in structural design and capable of achieving automatic filter screen cleaning operation.

Description

Technical Field

[0001] This utility model relates to the field of flushing plate screens at the inlet of circulating water pumps in thermal power plants, and particularly to an automatic flushing device for plate screens at the inlet of circulating water pumps in thermal power plants. Background Technology

[0002] Some power plant units have secondary circulating cooling water systems with cooling towers, including open-loop and closed-loop cooling water systems. The makeup water for the circulating cooling water system inside the cooling tower comes from canal water, reclaimed water (such as water from the wastewater treatment plant), and part of the return water from the open and closed-loop systems. Due to the location of some units in certain seasons, a large amount of willow catkins will fly, causing serious blockage of the plate filter screen at the inlet of the circulating pump, affecting the normal operation of the circulating pump and the stability of related systems.

[0003] Currently, the main method for cleaning filters still relies on manual labor, which is inefficient and labor-intensive.

[0004] Therefore, it is necessary to develop an automatic flushing device for the inlet plate filter screen of the circulating water pump in a thermal power plant to overcome the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an automatic flushing device for the inlet plate filter screen of the circulating water pump in a thermal power plant, which effectively overcomes the defects of the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] An automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant includes a track extending forward and backward and a mobile trolley mounted on the track and traveling along the track. The mobile trolley is equipped with a water pump, which is connected to a power unit that drives it. The inlet end of the water pump is connected to a suction pipe, which has an inlet pipe section extending outside the mobile trolley and capable of rotating up and down. A lifting mechanism connected to the inlet pipe section is mounted above the mobile trolley. Multiple nozzles are arranged in a row along the length of the track above the mobile trolley. A drive assembly connected to the multiple nozzles is mounted on the mobile trolley. The drive assembly is used to drive the multiple nozzles to reciprocate up and down and reciprocate forward and backward. The nozzles spray towards one side of the mobile trolley. The outlet end of the water pump is connected to the multiple nozzles through a pipeline.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the aforementioned power unit is an electric motor.

[0010] Furthermore, the aforementioned suction tube is an arm-loader.

[0011] Furthermore, the mobile trolley is provided with a support frame at its upper end, and the lifting mechanism and drive assembly are respectively mounted on the support frame.

[0012] Furthermore, the aforementioned lifting mechanism includes an electric hoist, and the upper part of the aforementioned support frame is provided with multiple guide wheels at intervals. The lifting chain of the aforementioned lifting mechanism extends downward after passing around the multiple guide wheels to connect with the aforementioned liquid inlet pipe section.

[0013] Furthermore, the aforementioned drive assembly includes a long, straight mounting bracket, a vertical reciprocating swing drive mechanism, and a front-to-back reciprocating swing drive mechanism. The mounting bracket is horizontally arranged along the length of the track. Both ends of the mounting bracket are provided with coaxially distributed rotating shafts, which are rotatably assembled with the support frame via the rotating shafts. The vertical reciprocating swing drive mechanism is connected to the rotating shaft at one end of the mounting bracket to drive the rotating shaft to rotate and drive the mounting bracket to swing up and down. A plurality of nozzles are respectively connected to nozzles extending toward one side of the moving trolley. The plurality of nozzles are spaced apart along the length of the mounting bracket and are rotatably connected to the mounting bracket. The ends of the nozzles away from the nozzles are respectively connected to the liquid inlet main pipe via hoses. The liquid inlet main pipe is connected to the liquid outlet of the water pump. The front-to-back reciprocating swing drive mechanism is respectively connected to the ends of the plurality of nozzles away from the nozzles.

[0014] Furthermore, the mounting bracket is provided with multiple channels extending through it in the front-back direction, and the nozzles pass through these channels one by one. A first connecting shaft is vertically fixed on the nozzle, passing through the channel and rotatably assembled with the mounting bracket. A second connecting shaft extending vertically is connected to the end of the nozzle away from the nozzle. A connecting rod parallel to the mounting bracket is provided on the side of the mounting bracket. Multiple limiting rings are provided on the connecting rod along its length. The multiple limiting rings are sleeved on the multiple second connecting shafts one by one. The reciprocating swing drive mechanism is connected to one end of the connecting rod for driving the connecting rod to move back and forth.

[0015] Furthermore, the aforementioned reciprocating swing drive mechanism includes a first drive motor, a first eccentric wheel, a first rocker arm, and a second rocker arm. The first drive motor is mounted on the support frame, the first eccentric wheel is mounted on the shaft of the first drive motor, one end of the first rocker arm is movably connected to the first eccentric wheel, one end of the second rocker arm is movably connected to the other end of the first rocker arm, and the other end of the second rocker arm is movably connected to the rotating shaft at one end of the mounting frame.

[0016] Furthermore, the aforementioned reciprocating swing drive mechanism includes a second drive motor, a second eccentric wheel, and a third rocker arm. The second drive motor is mounted on the support frame, the second eccentric wheel is mounted on the shaft of the second drive motor, one end of the third rocker arm is movably connected to the second eccentric wheel, and the other end is movably connected to one end of the connecting rod.

[0017] Furthermore, the aforementioned nozzles are provided in eight parts.

[0018] The beneficial effects of this utility model are: the structure is reasonably designed, which can realize automated filter cleaning operation, effectively reduce cleaning costs, shorten the cleaning cycle, and reduce the labor intensity of workers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the automatic flushing device for the inlet plate filter screen of the circulating water pump in a thermal power plant according to the present invention.

[0020] Figure 2 This is a side view of the structure of the automatic flushing device for the inlet plate filter screen of the circulating water pump in a thermal power plant according to this utility model.

[0021] Figure 3 This is a top view of the structure of the automatic flushing device for the inlet plate filter screen of the circulating water pump in a thermal power plant according to this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Mobile trolley; 2. Water pump; 3. Power unit; 4. Liquid extraction pipe; 5. Lifting mechanism; 6. Nozzle; 7. Support frame; 8. Mounting frame; 9. Connecting rod; 101. First drive motor; 102. First eccentric wheel; 103. First rocker arm; 104. Second rocker arm; 201. Second drive motor; 202. Second eccentric wheel; 203. Third rocker arm. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] Example

[0026] like Figure 1 , 2As shown in Figure 3, the automatic flushing device for the plate filter screen at the inlet of the circulating water pump in a thermal power plant in this embodiment includes a track extending forward and backward (G in the figure) and a mobile trolley 1 set on the track and moving along the track. The mobile trolley 1 is equipped with a water pump 2, and the water pump 2 is connected to a power device 3 that drives it. The liquid inlet end of the water pump 2 is connected to a liquid extraction pipe 4. The liquid extraction pipe 4 has a liquid inlet pipe section extending to the outside of the mobile trolley 1 and rotatable up and down (e in the figure). A lifting mechanism 5 connected to the liquid inlet pipe section is mounted above the mobile trolley 1. Multiple nozzles 6 are arranged in a row along the length of the track above the mobile trolley 1. The mobile trolley 1 is equipped with a drive assembly connected to the multiple nozzles 6. The drive assembly is used to drive the multiple nozzles 6 to swing up and down and back and forth. The spray direction of the nozzles 6 is towards the other side of the mobile trolley 1. The liquid outlet end of the water pump 2 is connected to the multiple nozzles 6 through a pipeline.

[0027] Before use, the automatic flushing device for the plate filter screen at the inlet of the circulating water pump in this embodiment of the thermal power plant lays a track on the side of the plate filter screen, parallel to the screen surface. The moving trolley 1 travels back and forth along the track. A water pool (there can be multiple water pools) is provided on the opposite side of the filter screen. After moving to the side of the target filter screen, the power unit 3 drives the water pump 2 to run, and pumps the water in the pool to the nozzle 6 through the liquid extraction pipe 4. The nozzle 6 sprays water onto the filter screen. Simultaneously, the drive assembly drives multiple nozzles 6 to swing up and down, so that the spray range covers the upper and lower surfaces of the filter screen. At the same time, the drive assembly also drives multiple nozzles 6 to swing back and forth along the length of the track, so that the overall running trajectory of the nozzles 6 is approximately "spiral", which can cover the entire filter screen area.

[0028] It should be noted that during the use of this embodiment, since the end of the liquid extraction pipe 4 extends into the water tank, as the moving trolley 1 moves, the end of the liquid extraction pipe 4 may need to cross different water tanks. Therefore, the lifting mechanism 5 can drive the liquid inlet pipe section to rise, thereby lifting its end to cross the water tank. After crossing, it can be lowered back into the water tank.

[0029] In this embodiment, magnets can be installed at both ends of the track, and magnetic induction switches can be installed at both ends of the moving trolley 1. When the moving trolley 1 approaches the magnet at either end, the magnetic induction switch senses it and sends feedback to the controller. The controller can then make the trolley move in the opposite direction to achieve reciprocating rinsing, thereby repeatedly rinsing the filter screen clean.

[0030] More specifically, the mobile trolley 1 includes a trolley body and rollers mounted on both sides of the front and rear ends of the trolley body. Two tracks are provided, each engaging with one of the rollers on either side. The two rollers at the front or rear are connected by an axle. The mobile trolley 1 is equipped with a drive motor, which drives the rollers along the tracks via a belt drive pair (existing technology, such as pulleys mounted on the axles and the drive motor shaft, with a belt wrapped around the pulleys). Reversing the drive motor enables reciprocating movement. The tracks can be made of existing I-beams.

[0031] In this embodiment, the power unit 3 is an electric motor. The shaft of the power unit 3 is connected to the shaft of the water pump 2, driving the water pump 2 to operate stably.

[0032] In this embodiment, the aforementioned suction pipe 4 is an loading arm. Generally, loading arms include a fixed pipeline section and a rotatable pipeline section (i.e., the inlet pipe section in this embodiment). One end of the inlet pipe section is provided with a flange (a in the figure). The port of the fixed pipeline section of the loading arm is also provided with a flange. The two flanges are rotated and assembled with a seal (a sealing structure of the prior art, which will not be described in detail here). The inlet pipe section may extend towards one end of the moving trolley 1, but at the end it is connected to a pipe section extending towards the other side of the moving trolley 1 into the water tank. A check valve (b in the figure) can also be connected to the end of the inlet pipe section to prevent liquid from flowing back through the inlet pipe section, so that the liquid only enters the inlet pipe section and does not flow back out.

[0033] In this embodiment, the upper end of the mobile trolley 1 is provided with a support frame 7, and the lifting mechanism 5 and the drive assembly are respectively mounted on the support frame 7. The design of the support frame 7 facilitates the assembly of the lifting mechanism 5 and the drive assembly.

[0034] In a preferred embodiment, the lifting mechanism 5 includes an electric hoist, and the upper part of the support frame 7 is provided with a plurality of guide wheels at intervals. The lifting chain of the lifting mechanism 5 extends downward after passing around the plurality of guide wheels to connect with the liquid inlet pipe section.

[0035] In the above implementation scheme, one chain of the lifting mechanism 5 (represented by f in the figure) passes around multiple horizontally distributed guide wheels and extends downward at the last guide wheel, connecting with the surface of the liquid inlet pipe section. Another chain of the lifting mechanism 5 can also connect to the liquid inlet pipe section, or pass around multiple horizontally distributed guide wheels and connect to a counterweight.

[0036] In a preferred embodiment, the drive assembly includes a long, straight mounting frame 8, a vertical reciprocating swing drive mechanism, and a front-to-back reciprocating swing drive mechanism. The mounting frame 8 is horizontally arranged along the length of the track. Both ends of the mounting frame 8 are provided with coaxially distributed rotating shafts, which are rotatably assembled with the support frame 7 via the rotating shafts. The vertical reciprocating swing drive mechanism is drivenly connected to the rotating shaft at one end of the mounting frame 8 to drive the rotating shaft to rotate and drive the mounting frame 8 to swing up and down. A plurality of nozzles 6 are respectively connected to a nozzle pipe (indicated by c in the figure) extending toward the side of the moving trolley 1. The plurality of nozzles are spaced apart along the length of the mounting frame 8 and are rotatably connected to the mounting frame 8. The ends of the nozzles away from the nozzles 6 are respectively connected to the liquid inlet main pipe via hoses. The liquid inlet main pipe is connected to the liquid outlet of the water pump 2. The front-to-back reciprocating swing drive mechanism is respectively connected to the ends of the plurality of nozzles away from the nozzles 6 to drive the plurality of nozzles to drive the nozzles 6 to swing back and forth.

[0037] In the above implementation scheme, since the mounting frame 8 is assembled to the support frame 7 at both ends via rotating shafts (which can be assembled using bearings), the vertical spray angle of the nozzle 6 can be adjusted during the rotation of the mounting frame 8 driven by the reciprocating swing drive mechanism, thus achieving reciprocating vertical swing spray rinsing. Furthermore, by coordinating the front and rear reciprocating swing drive mechanism to drive the nozzles 6 connected to the spray pipes to swing in the front and rear direction, the horizontal reciprocating swing of the nozzle 6 can be achieved. The design is very reasonable and ingenious.

[0038] In a preferred embodiment, the mounting frame 8 is provided with a plurality of channels passing through it at intervals along the front-back direction. The nozzles pass through the channels one by one. A first connecting shaft is vertically fixed on the nozzle, passing through the channel and rotatably assembled with the mounting frame 8. A second connecting shaft extending vertically is connected to the end of the nozzle away from the nozzle 6. A connecting rod 9 parallel to the mounting frame 8 is provided on its side. A plurality of limiting rings are provided on the connecting rod 9 along its length direction. The plurality of limiting rings are sleeved on the plurality of second connecting shafts one by one. The reciprocating swing drive mechanism is connected to one end of the connecting rod 9 for driving the connecting rod 9 to move back and forth.

[0039] In the above implementation scheme, the channel is a strip-shaped channel that allows the nozzle to deflect horizontally (that is, in the front-to-back direction). The reciprocating swing drive mechanism drives the connecting rod 9 to translate back and forth. Multiple limiting rings on the connecting rod 9 can pull the second connecting shaft to move back and forth, thereby realizing the nozzle driving the nozzle 6 to swing in the front-to-back direction. The structural design is quite ingenious.

[0040] In a preferred embodiment, the reciprocating swing drive mechanism includes a first drive motor 101, a first eccentric wheel 102, a first rocker arm 103, and a second rocker arm 104. The first drive motor 101 is mounted on the support frame 7, the first eccentric wheel 102 is mounted on the shaft of the first drive motor 101, one end of the first rocker arm 103 is movably connected to the first eccentric wheel 102, one end of the second rocker arm 104 is movably connected to the other end of the first rocker arm 103, and the other end of the second rocker arm 104 is movably connected to the rotating shaft at one end of the mounting frame 8.

[0041] In the above implementation scheme, the first drive motor 101 drives the first eccentric wheel 102 to rotate, thereby driving the first rocker arm 103 to reciprocate in a "push-pull" motion. The first rocker arm 103 drives the second rocker arm 104 to swing up and down, which causes the rotating shaft at the end of the mounting bracket 8 connected to the second rocker arm 104 to rotate back and forth, thereby realizing the up and down swing of the nozzle 6. The other end of the second rocker arm 104 is provided with a ring sleeve, which is fitted onto the rotating shaft at one end of the mounting bracket 8, and a nut is installed at the end of the rotating shaft to limit the ring sleeve and prevent it from falling off.

[0042] In a preferred embodiment, the reciprocating swing drive mechanism includes a second drive motor 201, a second eccentric wheel 202, and a third rocker arm 203. The second drive motor 201 is mounted on the support frame 7, the second eccentric wheel 202 is mounted on the shaft of the second drive motor 201, one end of the third rocker arm 203 is movably connected to the second eccentric wheel 202, and the other end is movably connected to one end of the connecting rod 9.

[0043] In the above implementation scheme, the second drive motor 201 drives the second eccentric wheel 202 to rotate, thereby causing the third rocker arm 203 to move up and down to achieve displacement in the front-to-back direction, realizing the forward and backward pushing and pulling movement of the connecting rod 9. In turn, the second connecting shaft connected and cooperating with the connecting rod 9 will generate displacement in the front-to-back direction, thereby realizing the reciprocating swing of the nozzle 6 in the front-to-back direction (that is, the horizontal direction).

[0044] In this embodiment, there are eight nozzles 6.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant, characterized in that: The system includes a track extending forward and backward and a mobile trolley (1) mounted on the track and traveling along the track. The mobile trolley (1) is equipped with a water pump (2), which is connected to a power device (3) that drives it. The inlet end of the water pump (2) is connected to a suction pipe (4), which has an inlet pipe section extending to the outside of the mobile trolley (1) and rotatable up and down. A lifting mechanism (5) connected to the inlet pipe section is mounted above the mobile trolley (1). Multiple nozzles (6) are arranged in a row along the length of the track above the mobile trolley (1). The mobile trolley (1) is equipped with a drive assembly connected to the multiple nozzles (6). The drive assembly is used to drive the multiple nozzles (6) to swing up and down and back and forth. The nozzles (6) spray towards one side of the mobile trolley (1). The outlet end of the water pump (2) is connected to the multiple nozzles (6) through a pipeline.

2. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 1, characterized in that: The power unit (3) is an electric motor.

3. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 1, characterized in that: The liquid extraction tube (4) is an arm-loader.

4. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 1, characterized in that: The mobile trolley (1) is provided with a support frame (7) at its upper end, and the lifting mechanism (5) and the drive assembly are respectively mounted on the support frame (7).

5. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 4, characterized in that: The lifting mechanism (5) includes an electric hoist. The upper part of the support frame (7) is provided with multiple guide wheels at intervals. The lifting chain of the lifting mechanism (5) extends downward after passing around the multiple guide wheels to connect with the liquid inlet pipe section.

6. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 4, characterized in that: The drive assembly includes a long, straight mounting frame (8), a vertical reciprocating swing drive mechanism, and a front-to-back reciprocating swing drive mechanism. The mounting frame (8) is horizontally arranged along the length of the track. Both ends of the mounting frame (8) are provided with coaxially distributed rotating shafts, which are rotatably assembled with the support frame (7) through the rotating shafts. The vertical reciprocating swing drive mechanism is connected to the rotating shaft at one end of the mounting frame (8) for driving the rotating shaft to rotate and causing the mounting frame (8) to swing up and down. A plurality of nozzles (6) are respectively connected to a spray pipe extending toward one side of the moving trolley (1). The plurality of spray pipes are spaced apart along the length of the mounting frame (8) and are rotatably connected to the mounting frame (8). The end of the spray pipe away from the nozzle (6) is connected to the liquid inlet main pipe through a hose. The liquid inlet main pipe is connected to the liquid outlet of the water pump (2). The front-to-back reciprocating swing drive mechanism is connected to the end of the plurality of spray pipes away from the nozzle (6).

7. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 6, characterized in that: The mounting bracket (8) is provided with multiple channels that pass through it from left to right along the front-back direction. The nozzles pass through the channels one by one. A first connecting shaft is fixed vertically on the nozzle, passing through the channel and rotatably assembled with the mounting bracket (8). A second connecting shaft extends vertically to the end of the nozzle away from the nozzle (6). A connecting rod (9) parallel to the mounting bracket (8) is provided on the side. Multiple limiting rings are provided on the connecting rod (9) along its length. The multiple limiting rings are sleeved on the multiple second connecting shafts one by one. The front-back reciprocating swing drive mechanism is connected to one end of the connecting rod (9) for driving the connecting rod (9) to move back and forth.

8. The automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 7, characterized in that: The reciprocating swing drive mechanism includes a first drive motor (101), a first eccentric wheel (102), a first rocker arm (103), and a second rocker arm (104). The first drive motor (101) is mounted on the support frame (7), the first eccentric wheel (102) is mounted on the shaft of the first drive motor (101), one end of the first rocker arm (103) is movably connected to the first eccentric wheel (102), one end of the second rocker arm (104) is movably connected to the other end of the first rocker arm (103), and the other end of the second rocker arm (104) is movably connected to the rotating shaft at one end of the mounting frame (8).

9. An automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to claim 7, characterized in that: The reciprocating swing drive mechanism includes a second drive motor (201), a second eccentric wheel (202), and a third rocker arm (203). The second drive motor (201) is mounted on the support frame (7), the second eccentric wheel (202) is mounted on the shaft of the second drive motor (201), one end of the third rocker arm (203) is movably connected to the second eccentric wheel (202), and the other end is movably connected to one end of the connecting rod (9).

10. An automatic flushing device for the inlet plate filter screen of a circulating water pump in a thermal power plant according to any one of claims 1 to 9, characterized in that: The nozzle (6) is provided in eight parts.

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