A full-automatic water flushing device applied to a coal conveying system of a thermal power plant

Abstract

The application discloses a kind of applied to full-automatic water washing device of coal conveying system in thermal power plant, it is related to coal washing technical field, including frame assembly, conveying assembly and floatation component;The frame assembly includes washing bin and vibrating screening bin;The vibrating screening bin is fixed on washing bin, and the washing bin is rectangular parallelepiped with cavity inside;The conveying assembly is arranged in washing bin;The floatation component is arranged in washing bin, and floatation component is located at one side of conveying assembly;It also includes washing and selecting component, and the washing and selecting component is arranged in washing bin, and the washing and selecting component is located at the lower side of floatation component, and washing and selecting component is located at one side of conveying assembly;It can be realized by changing the installation mode of washing and selecting frame, and adding the baffle of blocking water and coal simultaneously, so that water can gather together, it is convenient to carry out again screening for coal after primary screening, prevent fine coal particles from flowing out with water, improve the collection rate of fine coal particles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal washing, and particularly relates to a full-automatic water washing device applied to a coal conveying system of a thermal power plant. BACKGROUND

[0002] Coal, also known as coal, is a combustible black or brown-black sedimentary rock, usually occurring in coal beds or coal seams in rock strata or veins. Coal is a solid combustible mineral produced by the transformation of plant remains buried underground through long and complex biochemical, geochemical and physical and chemical processes.

[0003] Thermal power plant, also known as thermal power plant, is a plant that uses combustible materials (such as coal) as fuel to produce electric energy. The basic production process of thermal power plant is: when the fuel is burned, the water is heated to generate steam, the chemical energy of the fuel is converted into heat energy, the steam pressure drives the steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives the generator to rotate, and the mechanical energy is converted into electric energy. Thermal power plants are mainly divided into steam power plants, gas turbine power plants and internal combustion engine power plants; thermal power plants need a large amount of coal as fuel, and the coal in the thermal power plant needs to be screened before use, and the suitable part of the coal suitable for fuel is screened out, and the coal is washed.

[0004] In the prior art, a flotation device is arranged above the washing and selecting mechanism of the rough selecting mechanism, which can collect the fine particles floating on the surface of the water into the flotation device; in the process of use, since the washing and selecting cavity one and the washing and selecting cavity two are arranged in an open manner, the coal and water falling into the interior cannot be gathered and directly slide through the slope, resulting in that the washing and selecting mechanism and the flotation device cannot work; for example, a coal mining and washing equipment provided in the authorized announcement No. CN112916195B, the rough selecting mechanism performs the first screening, the mixing mechanism mixes the coal and water, the washing and selecting mechanism performs cleaning and re-screening and classification, and the flotation device includes a rotating shaft arranged in the middle of the washing and selecting mechanism and a flotation blade, wherein the rotating shaft is driven by a rotating motor, the cross section of the flotation blade is in a V-shaped structure, and the flotation blade is provided with water filtering micropores, which can collect the fine particles floating on the surface of the water.

[0005] There are great disadvantages: in the process of use, since the washing and selecting cavity one and the washing and selecting cavity two are arranged in an open manner, the coal and water falling into the interior cannot be gathered and directly slide through the slope, resulting in that the washing and selecting mechanism and the flotation device cannot work. SUMMARY

[0006] The embodiment of the application provides a full-automatic water flushing device applied to a coal conveying system of a thermal power plant, solves the problem that in the prior art, washing cavity one and washing cavity two are provided with openings, coal and water falling in the cavities cannot be gathered and directly slide through the slope, so that the washing mechanism and the flotation device cannot work, and the installation mode of the washing frame is changed, a baffle two for blocking water and coal is additionally added, so that water can be gathered together, and the coal after primary screening is conveniently screened again.

[0007] The embodiment of the application provides a full-automatic water flushing device applied to a coal conveying system of a thermal power plant, which comprises a frame assembly, a conveying assembly and a flotation assembly.

[0008] The frame assembly comprises a cleaning bin and a vibrating screening bin.

[0009] The vibrating screening bin is fixed on the cleaning bin, and the cleaning bin is a cuboid with a cavity in the inside.

[0010] The conveying assembly is arranged in the cleaning bin.

[0011] The flotation assembly is arranged in the cleaning bin, and the flotation assembly is located on one side of the conveying assembly.

[0012] The washing assembly is arranged in the cleaning bin, the washing assembly is located on the lower side of the flotation assembly, and the washing assembly is located on one side of the conveying assembly.

[0013] The washing assembly comprises a baffle two, a washing frame, a filter screen, an extension rod, an air injection hole and a fixing frame.

[0014] The baffle two and the fixing frame are fixed at the two ends in the length direction on the inner wall of the cleaning bin, and the fixing frame is located on the lower side of the baffle two.

[0015] The washing frame is arranged in an inclined mode, one end of the washing frame is fixed on the conveying assembly, and the other end of the washing frame, which is away from the conveying assembly, is located on the lower side of the baffle two.

[0016] The washing frame is provided with the air injection hole.

[0017] The filter screen is located on the upper side of the washing frame and the lower side of the flotation assembly, the lower side of the filter screen is close to the washing frame, and the two ends of the filter screen are respectively fixed on the conveying assembly and the side of the baffle two close to the conveying assembly.

[0018] The upper end of the extension rod is hinged to the lower side of the washing frame, and the lower end of the extension rod is hinged to the side of the fixing frame close to the conveying assembly.

[0019] As an improvement, the length direction of the baffle two and the fixing frame is parallel to the width direction of the cleaning bin.

[0020] The washing frame is at an angle of 10-20 degrees with the horizontal plane;

[0021] The lower end of the second baffle is made of rubber material, and the washing frame is close to the lower end of the second baffle;

[0022] The side wall of the washing frame is made of rubber material and is close to the side wall of the cleaning bin;

[0023] The length direction of the filter screen is perpendicular to the length direction of the second baffle, and the filter screen separates the washing frame into two chambers with the same volume;

[0024] The air injection holes are uniformly distributed and have a number of 30-50.

[0025] As an improvement, the frame assembly further comprises a discharge port, a water spraying frame, a water outlet pipe and a sewage outlet pipe;

[0026] The cleaning bin is provided with a discharge port on the side away from the vibrating screening bin;

[0027] The water spraying frame is fixed in the vibrating screening bin;

[0028] The water outlet pipe and the sewage outlet pipe are symmetrically fixed on both sides of the cleaning bin and are respectively located on both sides of the filter screen, the sewage outlet pipe is located on the lower side of the discharge port, and the water outlet pipe is provided with a filter screen;

[0029] The conveying assembly comprises a first baffle, a conveying roller frame and a discharging plate;

[0030] The discharging plate is inclinedly arranged, the discharging plate is at an angle of 10-20 degrees with the horizontal plane, one side of the discharging plate is fixed in the cleaning bin away from the discharge port, the length direction of the discharging plate is parallel to the length direction of the second baffle, and both ends of the length direction of the discharging plate are fixed on the inner wall of the cleaning bin;

[0031] One end of the washing frame is fixed on the discharging plate, and the connection part is made of rubber material;

[0032] The lower end of the first baffle is fixed on the discharging plate, and the upper end of the first baffle is close to the lower side of the screening frame in the vibrating screening bin;

[0033] The end of the filter screen away from the second baffle is fixed on the first baffle;

[0034] The first baffle separates the discharging plate and the screening frame in the vibrating screening bin into two part chambers, and the two part chambers correspond to the two chambers of the washing frame separated by the filter screen one by one;

[0035] Two conveying rollers are arranged on both sides of the first baffle respectively, the length direction of the conveying rollers is parallel to the length direction of the second baffle, the conveying rollers are arranged on the upper side of the discharging plate, and the conveying rollers are rotatably connected to the two sides of the first baffle.

[0036] The washing and selecting assembly further comprises a conveying belt and a conveying frame.

[0037] Two conveying belts are arranged in two cavities separated by the washing and selecting frame and the filter screen respectively, one end of the conveying belt is arranged on the lower side of the conveying frame, and the other end of the conveying belt extends to the outside of the cleaning bin through the discharging port.

[0038] The conveying belt is provided with filter holes.

[0039] As an improvement, the diameter of the screening holes on the screening frame which are higher than the first baffle is smaller than the diameter of the screening holes which are lower than the first baffle.

[0040] As an improvement, the floating assembly further comprises a motor and a scraper.

[0041] The motor is fixed on the cleaning bin.

[0042] Two scrapers are arranged on the output shaft of the motor, the vertical section of the scraper is V-shaped, and the surface of the scraper is provided with water filtering micropores.

[0043] The side of the V-shaped scraper is close to the upper end of the filter screen.

[0044] As an improvement, the rotating direction of the output shaft of the motor is consistent with the opening direction of the V-shaped scraper.

[0045] As an improvement, the floating assembly further comprises a storage bag.

[0046] The cross section of the scraper is arc-shaped.

[0047] Two storage bags are arranged corresponding to the two scrapers respectively, and the storage bags are detachably arranged on the end of the scrapers which is away from the output shaft of the motor.

[0048] As an improvement, the storage bag is made of gauze.

[0049] As an improvement, the floating assembly further comprises a supporting frame and an arc adjusting assembly.

[0050] The scraper is made of rubber.

[0051] The supporting frame is a cylinder, the axis of the supporting frame is on the same straight line with the axis of the output shaft of the motor, the supporting frame is fixed on the output shaft of the motor and arranged on the upper side of the scraper.

[0052] The two arc adjustment groups are respectively corresponding to the two scrapers, and each arc adjustment group comprises ten support rods and ten electric sliding tables;

[0053] The electric sliding tables are fixed on the lower side of the support frame and are uniformly and spacedly distributed, the upper ends of the support rods are slidably connected to the electric sliding tables, and the lower ends of the support rods are fixed on the side of the scraper away from the V-shaped opening.

[0054] As an improvement, the positions of the support rods on the electric sliding tables are changed to change the arc of the scraper.

[0055] The one or more technical solutions provided in the embodiments have at least the following technical effects or advantages:

[0056] Firstly, by changing the installation mode of the washing and selecting frame and adding the baffle for blocking water and coal, water can be gathered together, the coal after the initial screening can be conveniently screened again, the fine coal particles are prevented from flowing out with the water, and the collection rate of the fine coal particles is improved.

[0057] Secondly, the collection efficiency of the fine coal particles can be improved, the arc-shaped scraper reduces the centrifugal force that causes the fine coal particles to be thrown out in the rotating process, the storage bag can also collect a small amount of fine coal particles thrown out, the fine coal particles collected in the storage bag are difficult to be thrown out, the collection amount of the fine coal particles is improved, and the operation is more convenient.

[0058] Thirdly, the shape of the scraper can be freely changed according to the requirement, the collected fine coal particles can be conveniently conveyed into the storage bag, the conveying efficiency is improved, the arc of the scraper can be increased to gradually become semicircular, the collection efficiency of the fine coal particles is improved, the storage capacity is improved, the arc of the scraper is different, the resistance from the water in the rotating process is also different, the arc is controlled in different scenes to control the water resistance, and the service life and stability of the flotation assembly are improved. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 It is a front view of a full-automatic water washing device applied to a coal conveying system of a thermal power plant of the application;

[0060] Figure 2 It is a left view of a vibrating screening bin installation of a full-automatic water washing device applied to a coal conveying system of a thermal power plant of the application;

[0061] Figure 3 It is a scraper selection diagram of a full-automatic water washing device applied to a coal conveying system of a thermal power plant of the application;

[0062] Figure 4It is a scraping plate section view of a full-automatic water flushing device applied to a coal conveying system of a thermal power plant of the application;

[0063] Figure 5 It is an arc-shaped scraping plate view of a full-automatic water flushing device applied to a coal conveying system of a thermal power plant of the application;

[0064] Figure 6 It is a support frame installation bottom view of a full-automatic water flushing device applied to a coal conveying system of a thermal power plant of the application;

[0065] Figure 7 It is a scraping plate deformation view of a full-automatic water flushing device applied to a coal conveying system of a thermal power plant of the application;

[0066] Figure 8 It is a support frame and electric sliding table installation front view of a full-automatic water flushing device applied to a coal conveying system of a thermal power plant of the application;

[0067] Figure 9 It is a support frame and electric sliding table installation front view of a full-automatic water flushing device applied to a coal conveying system of a thermal power plant of the application; Figure 8 It is a structure enlarged view of A in the inner part.

[0068] In the figure: 100, frame assembly; 110, cleaning bin; 111, discharge port; 120, vibrating sieve bin; 130, water spraying frame; 140, water outlet pipe; 150, sewage outlet pipe;

[0069] 200, conveying assembly; 210, baffle one; 220, conveying roller frame; 230, discharging plate;

[0070] 300, washing and selecting assembly; 310, baffle two; 320, washing and selecting frame; 330, filter screen; 340, telescopic rod; 350, conveying belt; 360, conveying frame; 370, air jet hole; 380, fixing frame;

[0071] 400, floating assembly; 410, motor; 420, scraping plate; 430, storage bag; 440, support frame; 450, support rod; 460, electric sliding table. DETAILED DESCRIPTION

[0072] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the application are shown; however, the application can be realized in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided so that the disclosure of the application can be more thoroughly and completely understood.

[0073] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0075] When the device is in use, coal enters from above the vibrating screening chamber 120. First, the screening rack inside the vibrating screening chamber 120 separates the coal into two different sizes. As the coal falls out of the vibrating screening chamber 120, it is conveyed by the rolling of the conveyor rollers 220 to the discharge plate 230 and the washing rack 320. Simultaneously, the water spray rack 130 sprays water onto the falling coal. Water and coal accumulate on the washing rack 320. When a certain amount of coal is reached inside, the vibrating screening chamber 120 stops screening. When the water level reaches the highest point of the filter screen 330, water injection stops, and the air jet nozzles 370 continuously spray air to clean the coal stored inside, resulting in stratification. During the air jetting process, the gas volume can be adjusted, with heavier particles at the bottom and lighter particles at the top. In the upper layer, the filter screen 330 divides the washing rack 320 into two chambers. Smaller particles in the chamber where the coal falls from the screening rack is located can also pass through the filter screen 330 into the other chamber. At the same time, the sprayed gas can carry out the smaller fine particles and make them float on the water surface. The fine particles of clean coal floating on the water surface are collected by the rotation of the scraper 420. After the screening is completed, the telescopic rod 340 retracts, and the washing rack 320 is pressed tightly against the conveyor frame 360. The water and coal inside slide out through the inclined washing rack 320 and fall onto the conveyor frame 360 ​​and the conveyor belt 350. The water flows through the filter holes on the conveyor belt 350 to the lower side for collection. It can be discharged through the water outlet pipe 140 and filtered through the filter screen in the water outlet pipe 140, and then participate in the coal washing again. The coal is conveyed out.

[0076] Example 1

[0077] like Figures 1-4 As shown, this application discloses a fully automatic water flushing device for a coal conveying system in a thermal power plant, comprising a frame assembly 100, a conveying assembly 200, and a flotation assembly 400.

[0078] The frame assembly 100 includes a cleaning chamber 110 and a vibration screening chamber 120;

[0079] The vibrating screening bin 120 is fixed on the cleaning bin 110, and the cleaning bin 110 is a cuboid with a cavity inside;

[0080] The conveying assembly 200 is arranged in the cleaning bin 110;

[0081] The flotation assembly 400 is arranged in the cleaning bin 110, and the flotation assembly 400 is located on one side of the conveying assembly 200;

[0082] The washing and selecting assembly 300 is further included, and the washing and selecting assembly 300 is arranged in the cleaning bin 110, the washing and selecting assembly 300 is located on the lower side of the flotation assembly 400, and the washing and selecting assembly 300 is located on one side of the conveying assembly 200;

[0083] The washing and selecting assembly 300 includes the second baffle 310, the washing and selecting frame 320, the filter screen 330, the telescopic rod 340, the air jet hole 370 and the fixed frame 380;

[0084] The length direction of the second baffle 310 and the fixed frame 380 is parallel to the width direction of the cleaning bin 110, both ends of the length direction of the second baffle 310 and the fixed frame 380 are fixed on the inner wall of the cleaning bin 110, and the fixed frame 380 is located on the lower side of the second baffle 310;

[0085] The washing and selecting frame 320 is arranged obliquely, the washing and selecting frame 320 forms an angle of 10-20 degrees with the horizontal plane, one end of the washing and selecting frame 320 is fixed on the conveying assembly 200, the end of the washing and selecting frame 320 away from the conveying assembly 200 is located on the lower side of the second baffle 310, the lower end of the second baffle 310 is made of rubber, the washing and selecting frame 320 is close to the lower end of the second baffle 310, and the side wall of the washing and selecting frame 320 is made of rubber and close to the side wall of the cleaning bin 110;

[0086] The washing and selecting frame 320 is provided with the air jet hole 370, the air jet hole 370 is thirty to fifty, and is uniformly and spacedly distributed;

[0087] The length direction of the filter screen 330 is perpendicular to the length direction of the second baffle 310, the filter screen 330 is located on the upper side of the washing and selecting frame 320 and the lower side of the flotation assembly 400, the lower side of the filter screen 330 is close to the washing and selecting frame 320, the filter screen 330 divides the washing and selecting frame 320 into two chambers with the same volume, and both ends of the filter screen 330 are fixed on the conveying assembly 200 and the side of the second baffle 310 close to the conveying assembly 200 respectively;

[0088] The upper end of the telescopic rod 340 is hinged to the lower side of the washing and selecting frame 320, and the lower end of the telescopic rod 340 is hinged to the side of the fixed frame 380 close to the conveying assembly 200;

[0089] The frame assembly 100 further comprises a discharge port 111, a water spraying frame 130, a water outlet pipe 140 and a sewage outlet pipe 150;

[0090] The cleaning bin 110 is provided with the discharge port 111 away from one side of the vibrating screening bin 120;

[0091] The water spraying frame 130 is fixed in the vibrating screening bin 120;

[0092] The water outlet pipe 140 and the sewage outlet pipe 150 are symmetrically fixed on two sides of the cleaning bin 110 and respectively located on two sides of the filter screen 330, the sewage outlet pipe 150 is located below the discharge port 111, and the water outlet pipe 140 is provided with a filter screen;

[0093] The conveying assembly 200 comprises a baffle one 210, a conveying roller frame 220 and a discharging plate 230;

[0094] The discharging plate 230 is obliquely arranged, the discharging plate 230 forms an angle of 10-20 degrees with the horizontal plane, one side of the discharging plate 230 is fixed in the cleaning bin 110 away from the side of the discharge port 111, the length direction of the discharging plate 230 is parallel to the length direction of the baffle two 310, and both ends of the length direction of the discharging plate 230 are fixed on the inner wall of the cleaning bin 110;

[0095] One end of the washing and selecting frame 320 is fixed on the discharging plate 230, and the connection is made of rubber material;

[0096] The lower end of the baffle one 210 is fixed on the discharging plate 230, and the upper end of the baffle one 210 is close to the lower side of the screening frame in the vibrating screening bin 120;

[0097] The filter screen 330 is fixed on the baffle one 210 away from the baffle two 310;

[0098] The baffle one 210 divides the space between the discharging plate 230 and the screening frame in the vibrating screening bin 120 into two chambers, and the two chambers are respectively corresponding to the two chambers of the washing and selecting frame 320 separated by the filter screen 330;

[0099] The screening hole diameter of the screening frame above the baffle one 210 is smaller than the screening hole diameter below the baffle one 210;

[0100] The conveying roller frame 220 has two, and respectively corresponds to two sides of the baffle one 210, the length direction of the conveying roller frame 220 is parallel to the length direction of the baffle two 310, the conveying roller frame 220 is located on the upper side of the discharging plate 230, the conveying roller frame 220 is rotationally connected on two sides of the baffle one 210, and the conveying roller frame 220 is rotationally connected on the inner wall of the cleaning bin 110 away from the baffle one 210;

[0101] The cleaning bin 110 is symmetrically provided with a rotary motor outside, and the rotary motor rotating rod is fixed on the rotating shaft of the conveying roller frame 220;

[0102] The washing and selecting assembly 300 further comprises a conveying belt 350 and a conveying frame 360;

[0103] The conveying belt 350 has two, and each is corresponding to the two cavities separated by the filter screen 330 and the washing and selecting frame 320, respectively. One end of the conveying belt 350 is located below the conveying frame 360, and the other end away from the conveying frame 360 extends to the outside of the cleaning bin 110 through the discharge port 111;

[0104] The conveying belt 350 is provided with filter holes;

[0105] The flotation assembly 400 comprises a motor 410 and a scraper 420;

[0106] The motor 410 is fixed on the cleaning bin 110;

[0107] The scraper 420 has two, the vertical section of the scraper 420 is V-shaped, and the surface is provided with water filtering micro-holes. Two ends of the scraper 420 away from the storage bag 430 are symmetrically fixed on the output end rotating shaft of the motor 410, and the side edge of the V-shaped scraper 420 is close to the upper end of the filter screen 330;

[0108] The rotating direction of the rotating shaft of the motor 410 is consistent with the opening direction of the V-shaped scraper 420;

[0109] The vibrating sieve selection bin 120 is a prior art, and will not be described here.

[0110] When the device is in use, coal enters from above the vibrating screening bin 120, is first classified by the screening frame in the vibrating screening bin 120 into two different sizes of coal, and is conveyed to the discharge plate 230 and the washing and screening frame 320 by rolling of the conveying roller frame 220 when falling out of the vibrating screening bin 120, while the water spray frame 130 sprays water on the falling coal, the water and the coal are gathered on the washing and screening frame 320, when the internal coal reaches a certain amount, the vibrating screening bin 120 stops screening, when the water level reaches the highest end of the filter screen 330, water injection is stopped, the air injection hole 370 continuously injects air to wash the internal stored coal and cause stratification, the amount of gas can be adjusted during air injection, the particles with a larger specific gravity are in the lower layer and the particles with a smaller specific gravity are in the upper layer, the filter screen 330 separates the washing and screening frame 320 into two chambers, the smaller particles from the chamber in which the coal falling from the screening frame is located can also enter the other chamber through the filter screen 330, while the injected gas can carry the smaller fine particles out of the chamber and float on the water surface, the fine coal particles floating on the water surface are collected by rotation of the scraper 420, after screening is completed, the telescopic rod 340 is retracted, the washing and screening frame 320 is tightly attached to the conveying frame 360, the internal water and coal slide out through the inclined washing and screening frame 320 and fall on the conveying frame 360 and the conveyor belt 350, the water flows to the lower side through the filter holes on the conveyor belt 350 and is collected, can be discharged through the water outlet pipe 140, and is filtered through the filter screen in the water outlet pipe 140 to participate in coal washing again, and the coal is conveyed out.

[0111] Compared with the prior art, in use, by changing the installation mode of the washing and screening frame 320 and adding the water and coal blocking baffle 310, the water can be gathered together, the coal screened for the first time can be screened again, the fine coal particles are prevented from flowing out with the water, and the collection rate of the fine coal particles is improved.

[0112] Embodiment Two

[0113] In use of the device in Embodiment One, the fine coal particles floating on the water surface are collected by the scraper 420, but in the process of rotation, the fine coal particles collected by the scraper 420 are thrown out due to the centrifugal force, and accordingly the scheme of Embodiment One is improved, as shown in Figure 5

[0114] The flotation assembly 400 further comprises storage bags 430;

[0115] The cross section of the scraper 420 is arc-shaped;

[0116] The storage bags 430 are two and correspond to the scrapers 420 one by one, the storage bags 430 are detachably arranged at one end of the scraper 420 away from the rotating rod of the motor 410, and the storage bags 430 are made of gauze.​

[0117] The mesh diameter of the storage bag 430 is smaller than the diameter of the clean coal particles to be collected.

[0118] In use, the clean coal particles on the water surface are collected by the arc-shaped scraper 420, and under the action of centrifugal force, part of the clean coal particles enter the storage bag 430 along the scraper 420 under the action of centrifugal force, and the storage bag 430 can be used to store the collected clean coal particles.

[0119] The collection efficiency of the clean coal particles can be improved, the centrifugal force of the arc-shaped scraper 420 reduces the clean coal particles in the process of rotation, and the storage bag 430 can also collect a small amount of clean coal particles, and the clean coal particles collected in the storage bag 430 are difficult to be thrown out, which improves the collection amount of the clean coal particles and is more convenient to operate.

[0120] Example three

[0121] In use, the clean coal particles in the scraper 420 are collected in the storage bag 430 by the action of centrifugal force, the automatic collection efficiency is low, and manual collection is still needed, which leads to a decrease in work efficiency. Therefore, the scheme of example two is improved, as shown in Figures 6-9

[0122] The flotation assembly 400 further comprises a support frame 440 and an arc adjustment group;

[0123] The scraper 420 is made of rubber;

[0124] The support frame 440 is a cylinder, the axis of the support frame 440 is on the same straight line as the axis of the rotating shaft of the motor 410, the support frame 440 is fixed on the rotating shaft of the motor 410 and located on the upper side of the scraper 420;

[0125] The arc adjustment group has two, and each corresponds to two scrapers 420, and each arc adjustment group includes ten support rods 450 and electric sliding tables 460, and ten support rods 450 and ten electric sliding tables 460 correspond one by one;

[0126] The electric sliding table 460 is fixed on the lower side of the support frame 440 and is uniformly and spacedly distributed, the upper end of the support rod 450 is slidably connected to the electric sliding table 460, and the lower end of the support rod 450 is fixed on the side of the scraper 420 away from the V-shaped opening;

[0127] The position of the support rod 450 on the electric sliding table 460 changes, and the arc of the scraper 420 changes.

[0128] ​The shape and curvature of the scraper 420 can be changed at will by the electric sliding platform 460 and the support rod 450. When the fine coal particles collected in the scraper 420 need to be collected, the curved scraper 420 is gradually unfolded. During rotation, the fine coal particles are transported into the storage bag 430 by centrifugal force and water impact for collection. The greater the curvature of the adjusted scraper 420, the faster the fine coal particles slide, and the collection efficiency is improved.

[0129] The shape of the scraper 420 can be freely changed according to needs, which facilitates the transportation of the collected fine coal particles into the storage bag 430, improves the transportation efficiency, and at the same time, the curvature of the scraper 420 can be increased to gradually become semicircular, improving the efficiency of fine coal particle collection, increasing the storage capacity, and the resistance from water during rotation is different when the curvature of the scraper 420 is different. By controlling the curvature in different scenarios, the water resistance is controlled, and the service life and stability of the flotation assembly 400 are improved.

[0130] The above description is only the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A full-automatic water flushing device applied to a coal conveying system of a thermal power plant, comprising a frame assembly, a conveying assembly and a flotation assembly; the frame assembly comprises a cleaning bin and a vibrating screening bin; the vibrating screening bin is fixed on the cleaning bin, and the cleaning bin is a cuboid with a cavity inside; the conveying assembly is arranged in the cleaning bin; the flotation assembly is arranged in the cleaning bin and located at one side of the conveying assembly; characterized in that the frame assembly further comprises a washing and selecting assembly, which is arranged in the cleaning bin, located at the lower side of the flotation assembly and at one side of the conveying assembly; the washing and selecting assembly comprises a second baffle, a washing and selecting frame, a filter screen, an extension rod, a jet hole and a fixing frame; the two ends of the second baffle and the fixing frame in the length direction are fixed on the inner wall of the cleaning bin, and the fixing frame is located at the lower side of the second baffle; the washing and selecting frame is arranged obliquely, one end of the washing and selecting frame is fixed on the conveying assembly, and the end of the washing and selecting frame away from the conveying assembly is located at the lower side of the second baffle; the washing and selecting frame is provided with the jet hole; the filter screen is located at the upper side of the washing and selecting frame and the lower side of the flotation assembly, and the lower side of the filter screen is close to the washing and selecting frame, the two ends of the filter screen are respectively fixed on the conveying assembly and the side of the second baffle close to the conveying assembly; the upper end of the extension rod is hinged to the lower side of the washing and selecting frame, and the lower end of the extension rod is hinged to the side of the fixing frame close to the conveying assembly; the flotation assembly comprises a motor, a scraper, a storage bag, a support frame and an arc adjusting group; the motor is fixed on the cleaning bin; the scraper has two, the vertical section of the scraper is V-shaped, and the surface is provided with water filtering micropores, and the two ends of the scraper away from the storage bag are symmetrically fixed on the output shaft of the motor; the side of the V-shaped scraper is close to the upper end of the filter screen; the cross section of the scraper is arc-shaped; the storage bag has two and corresponds to the scraper one by one, and the storage bag is detachably arranged at the end of the scraper away from the motor rotating rod; the scraper is made of rubber; the support frame is a cylinder, the axis of the support frame is on the same straight line as the axis of the motor rotating shaft, the support frame is fixed on the rotating shaft of the motor and located at the upper side of the scraper; the arc adjusting group has two and corresponds to the two scrapers one by one, and each arc adjusting group comprises ten support rods and ten electric slides; the electric slides are fixed on the lower side of the support frame and are evenly and spacedly distributed, the upper end of the support rod is slidably connected to the electric slide, and the lower end of the support rod is fixed on the side of the scraper away from the V-shaped opening.

2. The full-automatic water flushing device applied to the coal conveying system of a thermal power plant according to claim 1, characterized in that, the length direction of the second baffle and the fixing frame is parallel to the width direction of the cleaning bin; the washing and selecting frame forms an angle of 10-20 degrees with the horizontal plane; the lower end of the second baffle is made of rubber, and the washing and selecting frame is close to the lower end of the second baffle; the side wall of the washing and selecting frame is made of rubber and close to the side wall of the cleaning bin; the length direction of the filter screen is perpendicular to the length direction of the second baffle, and the filter screen divides the washing and selecting frame into two cavities with the same volume; the jet hole has thirty to fifty, and is evenly and spacedly distributed.

3. The full-automatic water flushing device applied to the coal conveying system of a thermal power plant according to claim 2, characterized in that, the frame assembly further comprises a discharge port, a water spraying frame, a water outlet pipe and a sewage outlet pipe; the side of the cleaning bin away from the vibrating screening bin is provided with the discharge port; the water spraying frame is fixed in the vibrating screening bin; the water outlet pipe and the sewage outlet pipe are symmetrically fixed on the two sides of the cleaning bin and are respectively located at the two sides of the filter screen, the sewage outlet pipe is located at the lower side of the discharge port, and the water outlet pipe is provided with a filter screen inside; the conveying assembly comprises a first baffle, a conveying roller frame and a discharging plate; The blanking plate is obliquely arranged, and the blanking plate and the horizontal plane form an angle of 10-20 degrees. One side of the blanking plate is fixed in the cleaning bin away from the discharge port. The length direction of the blanking plate is parallel to the length direction of the second baffle, and both ends of the length direction of the blanking plate are fixed on the inner wall of the cleaning bin. One end of the washing and selecting frame is fixed on the blanking plate, and the connection is made of rubber material. The lower end of the first baffle is fixed on the blanking plate, and the upper end of the first baffle is close to the lower side of the screening frame in the vibrating screening bin. The end of the filter screen away from the second baffle is fixed on the first baffle. The first baffle separates the blanking plate and the screening frame in the vibrating screening bin into two chambers, and the two chambers correspond to the two chambers separated by the filter screen and the washing and selecting frame respectively. The conveying roller frame has two, and each side of the first baffle corresponds to one, the length direction of the conveying roller frame is parallel to the length direction of the second baffle, the conveying roller frame is located on the upper side of the blanking plate, the conveying roller frame is rotationally connected to both sides of the first baffle, and the side of the conveying roller frame away from the first baffle is rotationally connected to the inner wall of the cleaning bin. The washing and selecting assembly further comprises a conveying belt and a conveying frame. The conveying belt has two, and each side of the first baffle corresponds to one, the length direction of the conveying roller frame is parallel to the length direction of the second baffle, the conveying roller frame is located on the upper side of the blanking plate, the conveying roller frame is rotationally connected to both sides of the first baffle, and the side of the conveying roller frame away from the first baffle is rotationally connected to the inner wall of the cleaning bin. The conveying belt is provided with filter holes.

4. The full-automatic water flushing device applied to the coal conveying system of a thermal power plant according to claim 3, characterized in that, The diameter of the screening hole on the screening frame higher than the first baffle is smaller than the diameter of the screening hole lower than the first baffle.

5. The full-automatic water flushing device applied to the coal conveying system of a thermal power plant according to claim 1, characterized in that, The rotation direction of the motor shaft is consistent with the opening direction of the V-shaped scraper.

6. The full-automatic water flushing device applied to the coal conveying system of a thermal power plant according to claim 1, characterized in that, The storage bag is made of gauze material.

7. The full-automatic water flushing device applied to the coal conveying system of a thermal power plant according to claim 1, characterized in that, The support rod changes position on the electric sliding table to change the curvature of the scraper.

Images