Power plant and coal plant spraying device for large-scale thermal power generation

Abstract

The invention discloses a power plant and coal plant spraying device for large-scale thermal power generation, and belongs to the technical field of spraying, the power plant and coal plant spraying device comprises a support, an electric telescopic rod is assembled on the side face of the support, a sliding block is fixedly connected to the telescopic end of the electric telescopic rod, a hard water pipe is fixedly connected to the interior of the sliding block, and a water tank is assembled on the side face of the support. The water tank is connected with a water hose through a water pump, the end, away from the water pump, of the water hose communicates with a hard water pipe, and a rectangular plate is fixedly connected to the outer side of the hard water pipe. Through interaction of the rectangular plate, the L-shaped support plate, the motor, the square frame, a short pipe, a forked fixing rod, a universal shaft, a connecting rod, an extrusion ball, an oval groove, protruding blocks and a spray head, the extrusion ball is extruded through the multiple sets of irregular protruding blocks, and then the spray head can conduct irregular swing spraying along with the extrusion ball under the action of the connecting rod; and therefore, spraying can be carried out at multi-angle positions.

Description

Technical Field

[0001] This application relates to the technical field of spraying, and more specifically, to a spraying device for a coal yard in a power plant for large-scale thermal power generation. Background Art

[0002] Large-scale thermal power generation mainly relies on the coal in the coal yard as fuel. Through fuel combustion, water is turned into high-pressure steam to drive the gas turbine to rotate, converting chemical energy into internal energy. Then, the gas turbine drives the generator to rotate and converts internal energy into electrical energy to achieve power generation. Generally, the coal in the coal yard needs to be dusted and sprayed by a spraying device before it can be sent to the thermal power plant.

[0003] Most of the existing spraying devices for coal yards in large-scale thermal power plants have a relatively single spraying angle. They can often only spray a certain position and cannot spray multiple angles, resulting in low spraying efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a spraying device for a coal yard in a power plant for large-scale thermal power generation, which solves the problems raised in the above background art.

[0005] To achieve the above object, the present application provides a spraying device for a coal yard in a power plant for large-scale thermal power generation, including a bracket. An electric telescopic rod is assembled on the side of the bracket. The telescopic end of the electric telescopic rod is fixedly connected with a slider. A rigid water pipe is fixedly connected inside the slider. A water tank is assembled on the side of the bracket. The water tank is connected to a flexible water pipe through a water pump. The end of the flexible water pipe away from the water pump is communicated with the rigid water pipe. A rectangular plate is fixedly connected to the outside of the rigid water pipe. An L-shaped support plate is fixedly connected to the side of the rectangular plate. A motor is fixedly connected inside the L-shaped support plate. The output shaft of the motor is fixedly connected with a square frame. An oval groove is formed on the side of the square frame. An irregular convex block is fixedly connected inside the oval groove. Three short pipes are communicated with the bottom end of the rigid water pipe. One end of each of the three short pipes away from the rigid water pipe is fixedly connected with a universal shaft. Sprayers are rotatably connected to the outside of the three universal shafts. A connecting rod is fixedly connected to the side of the sprayer. One end of the connecting rod away from the sprayer is fixedly connected with a pressing ball. By setting the rectangular plate, L-shaped support plate, motor, square frame, short pipe, bifurcated fixing rod, universal shaft, connecting rod, pressing ball, oval groove, convex block, and sprayer to interact with each other, the pressing ball is squeezed by multiple irregular convex blocks, and then through the action of the connecting rod, the sprayer can swing irregularly to spray, so that multiple angles can be sprayed.

[0006] Preferably, a dredging assembly for dredging the water spray holes is assembled on the side of the sprayer, and a scraping assembly for scraping the dust adhering to the bottom end of the sprayer is assembled at the bottom end of the sprayer.

[0007] Preferably, a forked fixing rod is fixedly connected to the side surface of the connecting rod, and the ends of the forked fixing rod away from the connecting rod are respectively fixedly connected to the side surfaces of the other two groups of spray heads.

[0008] Preferably, a plurality of groups of bump blocks are provided. The extrusion ball is located inside the elliptical groove, and the extrusion ball is located on the movement trajectories of the plurality of groups of bump blocks.

[0009] Preferably, three groups of dredging assemblies are provided. Each of the three groups of dredging assemblies includes a first support plate. The three first support plates are all fixedly connected to the outer bottom end of the hard water pipe. Hydraulic cylinders I penetrate and are fixedly connected inside the three first support plates. One ends of the three hydraulic cylinders I are slidably connected with stress rods I through pistons, and the other ends of the three hydraulic cylinders I are slidably connected with pressure rods through pistons. The ends of the three pressure rods away from the hydraulic cylinders I are all fixedly connected with discs. The side surfaces of the three discs are elastically connected to the three spray heads respectively through torsion spring rods I. A plurality of groups of dredging thorns are assembled at the bottom ends of the three discs. By providing the torsion spring rod I, through the interaction among the first support plate, the stress rod I, the hydraulic cylinder I, the pressure rod, the disc, and the dredging thorns, when the stress rod I is stressed, the pressure rod can be pushed out, acting on the disc, so that the disc drives the plurality of groups of dredging thorns to insert towards the spraying holes at the bottom end of the spray head, thereby enabling dredging.

[0010] Preferably, the plurality of groups of dredging thorns in the three groups respectively correspond to the water spraying holes at the bottom ends of the three spray heads one by one.

[0011] Preferably, three groups of scraping assemblies are provided. Each of the three groups of scraping assemblies includes a second support plate. Hydraulic cylinders II penetrate and are fixedly connected inside the three second support plates. One ends of the three hydraulic cylinders II are slidably connected with stress rods II through pistons, and the other ends of the three hydraulic cylinders II are slidably connected with rack bars through pistons. L-shaped round rods are fixedly connected to the side surfaces of the three discs. The ends of the three L-shaped round rods away from the discs are all fixedly connected with extrusion blocks. Torsion spring rods II are rotatably and elastically connected to the bottom ends of the three spray heads. Scrapers are fixedly connected to the side surfaces of the three torsion spring rods II, and gears are fixedly connected to the outer sides of the three torsion spring rods II.

[0012] Preferably, the three gears are respectively engaged with the three rack bars. By providing the L-shaped round rod, through the interaction among the extrusion block, the stress rod II, the second support plate, the hydraulic cylinder II, the rack bar, the scraper, the gear, and the torsion spring rod II, when the extrusion block is extruded, the stress rod II is subjected to the extrusion force, so that the rack bar can be pushed out, acting on the gear, and the gear drives the scraper to scrape at the bottom end of the spray head.

[0013] The beneficial effects of the present application are as follows: (1) In this application, by setting a rectangular plate, an L-shaped support plate, a motor, a regular square frame, a short pipe, a bifurcated fixing rod, a universal shaft, a connecting rod, an extrusion ball, an oval groove, a convex block, and a nozzle, they interact with each other. The extrusion ball is extruded by multiple groups of irregular convex blocks, and then through the action of the connecting rod, the nozzle can swing irregularly for spraying, so that spraying can be carried out at multiple angular positions.

[0014] (2) In this application, by setting a torsion spring rod one, a support plate one, a stress rod one, a hydraulic cylinder one, a pressure rod, a disc, and a dredging thorn, they interact with each other. When the stress rod one is stressed, the pressure rod can be pushed out and act on the disc, so that the disc drives multiple groups of dredging thorns to insert into the spraying holes at the bottom of the nozzle, thereby enabling dredging.

[0015] (3) In this application, by setting an L-shaped round rod, an extrusion block, a stress rod two, a support plate two, a hydraulic cylinder two, a rack rod, a scraper, a gear, and a torsion spring rod two, they interact with each other. When the extrusion block is extruded, the stress rod two is subjected to an extrusion force, and then the rack rod can be pushed out and act on the gear, so that the gear drives the scraper to scrape at the bottom of the nozzle.

[0016] The accompanying drawings that form a part of this application are used to provide a further understanding of this application, making other features, purposes, and advantages of this application more obvious. The schematic embodiments and descriptions of the accompanying drawings of this application are used to explain this application and do not constitute an improper limitation of this application. In the accompanying drawings: Figure 1 is a schematic structural diagram of the overall appearance of the present invention; Figure 2 is a schematic diagram of a partial structure of the present invention; Figure 3 is a schematic diagram of a partial structure of the present invention Figure 1 ; Figure 4 is a schematic diagram of a partial structure of the present invention Figure 2 ; Figure 5 is a schematic diagram of a partial structure of the present invention Figure 3 ; Figure 6 is a schematic diagram of a partial structure of the present invention Figure 4 ; Figure 7 is a schematic structural diagram of the dredging component of the present invention Figure 1 ; Figure 8 is a schematic structural diagram of the dredging component of the present invention Figure 2 ; Figure 9 is a schematic structural diagram of the scraping component of the present invention Figure 1 ; Figure 10 The structure of the scraping component of the present invention is shown in FIG. Figure 2 .

[0017] In the above figure, 1. Bracket; 2. Electric telescopic rod; 3. Sliding block; 4. Water tank; 5. Soft water pipe; 6. Hard water pipe; 8. Dredging assembly; 9. Scraping assembly; 701. Rectangular plate; 702. L-shaped bracket plate; 703. Motor; 704. Square frame; 705. Short tube; 706. Forked fixing rod; 707. Universal shaft; 708. Connecting rod; 709. Extrusion ball; 710. Oval groove; 711. Bump; 7 12. Nozzle; 801. Torsion spring rod one; 802. Support plate one; 803. Force rod one; 804. Hydraulic cylinder one; 805. Pressure rod; 806. Disc; 807. Dredging thorn; 901. L-shaped round rod; 902. Extrusion block; 903. Force rod two; 904. Support plate two; 905. Hydraulic cylinder two; 906. Rack rod; 907. Scraper; 908. Gear; 909. Torsion spring rod two. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0020] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0021] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0022] In addition, the terms "mount", "set", "provided with", "connected", "connected to", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0024] Example 1, see Figures 1 - 6, this embodiment provides a spraying device for a coal yard in a large-scale thermal power plant, including a bracket 1. The function of the bracket 1 is to support the left and right translational movement of the rigid water pipe 6, thus facilitating the movement of the rigid water pipe 6. An electric telescopic rod 2 is assembled on the side of the bracket 1. The telescopic end of the electric telescopic rod 2 is fixedly connected to a slider 3. The rigid water pipe 6 is fixedly connected inside the slider 3. A water tank 4 is assembled on the side of the bracket 1. A water inlet pipe is assembled at the top of the water tank 4 to facilitate water resources to enter the interior of the water tank 4 from the water inlet pipe. The water tank 4 is connected to a flexible water pipe 5 through a water pump. The end of the flexible water pipe 5 away from the water pump is communicated with the rigid water pipe 6. A rectangular plate 701 is fixedly connected to the outside of the rigid water pipe 6. The rectangular plate 701 is used to support the rotational movement of the square frame 704 and can also support the use of the motor 703. An L-shaped support plate 702 is fixedly connected to the side of the rectangular plate 701. The motor 703 is fixedly connected inside the L-shaped support plate 702. The output shaft of the motor 703 is fixedly connected to the square frame 704. An oval groove 710 is opened on the side of the square frame 704. The depth of the opened oval groove 710 is two-thirds of the width of the square frame 704. An irregular convex block 711 is fixedly connected inside the oval groove 710. When multiple groups of irregular convex blocks 711 squeeze the extrusion ball 709, it can make the extrusion ball 709 drive the connecting rod 708 and then drive the nozzle 712 to make irregular swinging movements. Three short pipes 705 are communicated with the bottom end of the rigid water pipe 6. The ends of the three short pipes 705 away from the rigid water pipe 6 are all fixedly connected to a universal joint 707. The outside of the three universal joints 707 is rotatably connected to a nozzle 712. The inside of the three universal joints 707 is in an open state, so that water resources can enter the interiors of the three nozzles 712 through the three universal joints 707 respectively for spraying water. A connecting rod 708 is fixedly connected to the side of the nozzle 712. The function of the connecting rod 708 is to link the movement of the extrusion ball 709 and the nozzle 712. The extrusion ball 709 is of a spherical structure. The end of the connecting rod 708 away from the nozzle 712 is fixedly connected to the extrusion ball 709. A dredging component 8 for dredging the water spray holes is assembled on the side of the nozzle 712. A scraping component 9 for scraping the dust adhering to the bottom end of the nozzle 712 is assembled at the bottom end of the nozzle 712. A forked fixing rod 706 is fixedly connected to the side of the connecting rod 708. The forked fixing rod 706 links the nozzle 712 near the motor 703 with the other two nozzles 712 through the forked rods, so that the three nozzles 712 can make synchronous irregular swinging movements. The ends of the forked fixing rod 706 away from the connecting rod 708 are respectively fixedly connected to the sides of the other two nozzles 712. Multiple groups of convex blocks 711 are provided. The extrusion ball 709 is located inside the oval groove 710, and the extrusion ball 709 is located on the movement tracks of multiple groups of convex blocks 711.

[0025] During use, people first need to move the device to a position suitable for its use. First, water resources are conveyed into the interior of the water tank 4 through the water inlet of the water tank 4. Then, the switch of the water pump is turned on, so that the water pump can draw water resources into the interior of the water tank 4 through a short section of rigid water pipe and the flexible water pipe 5, and then convey them into the interior of the rigid water pipe 6. Then, the electric telescopic rod 2 is activated, so that the telescopic end of the electric telescopic rod 2 can drive the slider 3 to slide left and right, and can even drive the flexible water pipe 5 to slide left and right accordingly. At the same time, the switch of the motor 703 is turned on, so that the output shaft of the motor 703 can drive the square frame 704 to rotate. When the square frame 704 rotates, it can drive a plurality of convex blocks 711 inside the elliptical groove 710 on its surface to rotate synchronously. Since an extrusion ball 709 is fixed to the side of a set of nozzles 712 through a connecting rod 708, and the extrusion ball 709 is located inside the elliptical groove 710, when the square frame 704 rotates, the plurality of convex blocks 711 inside the elliptical groove 710 can sequentially extrude the extrusion ball 709, so that the extrusion ball 709 drives the connecting rod 708 to swing irregularly under the extrusion of the irregular convex blocks 711. And since universal shafts 707 are connected between the three sets of nozzles 712 and the short pipes 705, the nozzles 712 can be made to perform an irregular swinging and sprinkling motion. At the same time, since the bifurcated fixing rods 706 are fixedly connected to the other two sets of nozzles 712, the three sets of nozzles 712 can be made to perform synchronous irregular swinging motions, so that the spraying range of the three sets of nozzles 712 is wider, and some dead corners can also be sprayed to.

[0026] Example 2, see Figures 1 - 8, on the basis of Embodiment 1, there are three sets of dredging components 8 in this application. The three sets of dredging components 8 all include the first support plate 802. The function of the three first support plates 802 is to support the use of the three first hydraulic cylinders 804 respectively, so as to facilitate the use of the three first hydraulic cylinders 804. And soft hydraulic cylinders are connected in the middle positions of the three first hydraulic cylinders 804. The three first support plates 802 are all fixedly connected to the outer bottom end of the hard water pipe 6. The first hydraulic cylinders 804 penetrate and are fixedly connected inside the three first support plates 802. One ends inside the three first hydraulic cylinders 804 are all slidably connected with the first stress rods 803 through pistons. When the three first stress rods 803 are respectively squeezed during the movement of the three nozzles 712, the liquid pressure inside the three first hydraulic cylinders 804 increases at this time, so as to be able to push out the three pressure rods 805 respectively. The other ends inside the three first hydraulic cylinders 804 are all slidably connected with the pressure rods 805 through pistons. One ends of the three pressure rods 805 away from the first hydraulic cylinders 804 are all fixedly connected with discs 806. The sides of the three discs 806 are respectively elastically connected with the three nozzles 712 through the first torsion spring rods 801. The function of the first torsion spring rod 801 is that after the three discs 806 perform arc-shaped movements, when the three first stress rods 803 are not squeezed, the forces squeezing the three discs 806 disappear at this time. At this time, the three first torsion spring rods 801 can respectively drive the three discs 806 to automatically reset under the action of their own resilience. A plurality of dredging thorns 807 are assembled at the bottom ends of the three discs 806. The three sets of a plurality of dredging thorns 807 respectively correspond one-to-one to the water spraying holes at the bottom ends of the three nozzles 712. The three sets of a plurality of dredging thorns 807 respectively correspond one-to-one to the water spraying holes at the bottom ends of the three nozzles 712. Therefore, the water spraying holes can be comprehensively dredged.

[0027] During use: On the basis of Embodiment 1, when the three nozzles 712 can make irregular swinging movements under the extrusion of the irregular bumps 711, the three nozzles 712 can respectively squeeze the three first stress rods 803 during the swinging movement. When the three first stress rods 803 respectively receive the forces squeezed by the three nozzles 712, the liquid pressure inside the three first hydraulic cylinders 804 increases at this time, so as to be able to push out the three pressure rods 805 respectively. When the three pressure rods 805 are pushed out, they can respectively act on the three discs 806, so as to be able to perform arc-shaped movements on the three discs 806 with the three first torsion spring rods 801 as the rotation points. At the same time, when the three discs 806 perform arc-shaped movements, they can respectively drive a plurality of dredging thorns 807 at the bottoms of the three discs 806 to respectively correspond to the water outlet holes at the bottom ends of the three nozzles 712 one by one, so as to be able to dredge the water outlet holes at the bottom ends of the three nozzles 712 one by one.

[0028] Embodiment 3, see Figures 1 - 10, on the basis of Embodiment 1, there are three sets of scraping components 9 in this application. The three sets of scraping components 9 all include the second support plate 904. The second hydraulic cylinders 905 penetrate and are fixedly connected inside the three sets of second support plates 904. The function of the three sets of second support plates 904 is to support the use of the three sets of second hydraulic cylinders 905 respectively, so as to facilitate the use of the three sets of first hydraulic cylinders 804. One end inside each of the three sets of second hydraulic cylinders 905 is slidably connected with a second force-bearing rod 903 through a piston, and the other end inside each of the three sets of second hydraulic cylinders 905 is slidably connected with a rack rod 906 through a piston. L-shaped round rods 901 are fixedly connected to the sides of the three discs 806. One end of each of the three sets of L-shaped round rods 901 away from the disc 806 is fixedly connected with an extrusion block 902. When the three sets of extrusion blocks 902 move respectively driven by the three sets of L-shaped round rods 901, they can respectively extrude the three sets of second force-bearing rods 903 during the movement process, so that the liquid inside the three sets of second hydraulic cylinders 905 increases, and thus each of the three sets of rack rods 906 can be pushed out. The bottoms of the three sets of nozzles 712 are rotatably and elastically connected with second torsion spring rods 909. Scrapers 907 are fixedly connected to the sides of the three sets of second torsion spring rods 909. The three sets of scrapers 907 are respectively attached to the bottoms of the three sets of nozzles 712. Therefore, when the three sets of scrapers 907 move, they can thoroughly scrape the dust, coal ash, etc. adhering to the bottoms of the three sets of nozzles 712. Gears 908 are fixedly connected to the outsides of the three sets of second torsion spring rods 909. The three sets of gears 908 are respectively meshed with the three sets of rack rods 906.

[0029] During use: On the basis of Embodiment 1, when the three sets of discs 806 move in an arc, they can respectively drive the three sets of L-shaped round rods 901 to move synchronously in an arc. However, during the process of the three sets of L-shaped round rods 901 moving in an arc, they can respectively squeeze the three sets of second force-bearing rods 903. When the three sets of second force-bearing rods 903 are all subjected to the extrusion force of the extrusion blocks 902 driven by the three sets of L-shaped round rods 901 and are extruded, the pressure of the liquid inside the three sets of second hydraulic cylinders 905 increases, and thus the three sets of rack rods 906 can be respectively pushed out. When the three sets of rack rods 906 are pushed out, they can respectively act on the three sets of gears 908. Since the three sets of gears 908 are respectively in a meshed state with the three sets of rack rods 906, therefore, the three sets of gears 908 can all rotate. When the three sets of gears 908 rotate, they can respectively make the three sets of second torsion spring rods 909 rotate. At the same time, when the three sets of second torsion spring rods 909 rotate, they can respectively drive the three sets of scrapers 907 to also rotate, so that the three sets of scrapers 907 can respectively scrape the bottoms of the three sets of nozzles 712.

[0030] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A coal yard spraying device for a large-scale thermal power generation power plant, including a bracket (1). An electric telescopic rod (2) is assembled on the side of the bracket (1). The telescopic end of the electric telescopic rod (2) is fixedly connected with a slider (3). A rigid water pipe (6) is fixedly connected inside the slider (3). A water tank (4) is assembled on the side of the bracket (1). The water tank (4) is connected to a flexible water pipe (5) through a water pump. The end of the flexible water pipe (5) far from the water pump is communicated with the rigid water pipe (6). It is characterized in that A rectangular plate (701) is fixedly connected to the outer side of the rigid water pipe (6). An L-shaped support plate (702) is fixedly connected to the side of the rectangular plate (701). A motor (703) is fixedly connected inside the L-shaped support plate (702). The output shaft of the motor (703) is fixedly connected with a square frame (704). An oval groove (710) is opened on the side of the square frame (704). An irregular convex block (711) is fixedly connected inside the oval groove (710). Three short pipes (705) are communicated with the bottom end of the rigid water pipe (6). The ends of the three short pipes (705) far from the rigid water pipe (6) are all fixedly connected with universal shafts (707). Three spray heads (712) are rotatably connected to the outside of the three universal shafts (707). A connecting rod (708) is fixedly connected to the side of the spray head (712). The end of the connecting rod (708) far from the spray head (712) is fixedly connected with a squeezing ball (709).

2. The spray device for a coal yard of a power plant for large-scale thermal power generation according to claim 1, wherein, A dredging component (8) for dredging the water spraying holes is assembled on the side of the spray head (712). A scraping component (9) for scraping the dust adhering to the bottom end of the spray head (712) is assembled at the bottom end of the spray head (712).

3. The spray device for the coal yard of a large-scale thermal power generation power plant according to claim 1, characterized in that, A bifurcated fixing rod (706) is fixedly connected to the side of the connecting rod (708). The ends of the bifurcated fixing rod (706) far from the connecting rod (708) are respectively fixedly connected to the sides of the other two spray heads (712).

4. A coal yard spraying device for a large-scale thermal power generation power plant according to claim 1, characterized in that, A plurality of groups of the convex blocks (711) are provided. The squeezing ball (709) is located inside the oval groove (710). The squeezing ball (709) is located on the movement tracks of the plurality of groups of convex blocks (711).

5. The spray device for a coal yard of a power plant for large-scale thermal power generation according to claim 2, characterized in that, There are three sets of the dredging components (8). Each of the three sets of dredging components (8) includes a first support plate (802). The three first support plates (802) are all fixedly connected to the outer bottom end of the hard water pipe (6). A first hydraulic cylinder (804) is penetrated and fixedly connected inside each of the three first support plates (802). One end inside each of the three first hydraulic cylinders (804) is slidably connected with a first stress rod (803) through a piston. The other end inside each of the three first hydraulic cylinders (804) is slidably connected with a pressure rod (805) through a piston. One end of each of the three pressure rods (805) far from the first hydraulic cylinder (804) is fixedly connected with a disc (806). The sides of the three discs (806) are elastically connected to the three spray heads (712) respectively through a first torsion spring rod (801). Multiple dredging thorns (807) are assembled at the bottom end of each of the three discs (806).

6. The coal yard spraying device for a large-scale thermal power generation power plant according to claim 5, characterized in that, The multiple dredging thorns (807) in the three sets respectively correspond one by one to the water spraying holes at the bottom ends of the three spray heads (712).

7. The spray device for a coal yard of a large-scale thermal power generation power plant according to claim 1, characterized in that, There are three sets of the scraping components (9). Each of the three sets of scraping components (9) includes a second support plate (904). A second hydraulic cylinder (905) is penetrated and fixedly connected inside each of the three second support plates (904). One end inside each of the three second hydraulic cylinders (905) is slidably connected with a second stress rod (903) through a piston. The other end inside each of the three second hydraulic cylinders (905) is slidably connected with a rack bar (906) through a piston. An L-shaped round bar (901) is fixedly connected to the side of each of the three discs (806). One end of each of the three L-shaped round bars (901) far from the disc (806) is fixedly connected with an extrusion block (902). A second torsion spring rod (909) is rotatably and elastically connected to the bottom end of each of the three spray heads (712). A scraper (907) is fixedly connected to the side of each of the three second torsion spring rods (909). A gear (908) is fixedly connected to the outside of each of the three second torsion spring rods (909).

8. A coal yard spraying device for a large-scale thermal power generation power plant according to claim 7, characterized in that, The three gears (908) are respectively meshed with the three rack bars (906).

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