Fire coal crushing device

Abstract

The invention relates to the technical field of thermal power plants, in particular to a fire coal crushing device which comprises a treatment box and a coal crushing assembly arranged in the treatment box, and a filter plate used for filtering and screening crushed coal briquettes is further arranged in the treatment box; the vibrating mechanism is arranged on the filter plate in a matched manner; and the reverse blowing mechanism is arranged in the treatment box and is arranged on the lower side of the filter plate. According to the device, pulverized coal can be shaken off through vibration while coal briquettes entering the treatment box are crushed under the action of the coal crushing assembly, blockage caused by accumulation of the pulverized coal on a filter plate is avoided, and the screening and filtering operation of the pulverized coal can be accelerated; according to the filter plate, the back-blowing mechanism and the vibration mechanism can be cooperated, the vibration mechanism is driven to conduct vibration treatment on residual and accumulated pulverized coal on the filter plate, meanwhile, the pulverized coal on the filter plate is blown under the action of reverse airflow, the problem of the residual pulverized coal on the filter plate is effectively solved, and the good filtering performance of the filter plate is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal power plants, in particular to a coal crushing device. BACKGROUND

[0002] Most thermal power plants use coal as primary energy, and use belt conveying technology to deliver treated coal powder to the boiler. The coal powder is burned to heat the boiler, causing the water in the boiler to become water vapor. After primary heating, the water vapor enters the high-pressure cylinder. In order to improve thermal efficiency, the water vapor should be subjected to secondary heating. The water vapor enters the medium-pressure cylinder and is used to drive the steam turbine generator to generate electricity. During the thermal power generation process, the combustion condition of the coal has an important effect on the power generation efficiency. Therefore, the coal powder needs to be crushed before being burned.

[0003] At present, after the coal is crushed by the coal crushing device, the coal powder will enter the screening and filtering device for processing. However, due to the loose nature of the coal powder, it is easy to accumulate inside the device, especially on the surface of the filter plate. If the coal powder accumulates on the surface of the filter plate during the screening of the coal powder, it will cause the filter plate to be blocked. The blockage of the filter plate not only reduces the filtering efficiency, but also causes the filter to be overloaded, increasing the failure rate of the device.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as the closest prior art. SUMMARY

[0005] The purpose of the present application is to solve the above problems and provide a coal crushing device.

[0006] In order to solve the above technical problems, the present application adopts the following technical solutions: a coal crushing device, comprising a treatment box, a coal crushing assembly arranged in the treatment box for crushing the coal, and a filter plate arranged in the treatment box for filtering and screening the crushed coal;

[0007] A vibration mechanism is arranged on the filter plate to vibrate the filter plate and shake the coal powder through the filter plate into the lower side of the treatment box;

[0008] A back-blowing mechanism is arranged in the treatment box below the filter plate to pump in gas to back-sweep the coal powder on the filter plate.

[0009] Further, the vibration mechanism comprises a power shaft arranged below the filter plate, cam blocks symmetrically arranged on the power shaft and abutting against the bottom surface of the filter plate, support rings arranged at both ends of the power shaft and fixed to the inner wall of the treatment box, and springs arranged at the edges of the support rings and elastically connected to the filter plate.

[0010] Further, the vibrating mechanism further comprises a ring-shaped scraper arranged on the filter plate and used for scraping the filter holes on the surface of the filter plate along the circumferential direction of the filter plate, a transmission shaft is arranged on the ring-shaped scraper at the center position of the filter plate, and a worm and worm gear transmission structure is arranged on the transmission shaft and rotates along with the power shaft.

[0011] The worm and worm gear transmission structure comprises a worm arranged on the power shaft and a worm wheel arranged on the side of the worm and sleeved on the transmission shaft.

[0012] Further, the back-blowing mechanism comprises a fixed pipe arranged on one side of the inner wall of the treatment box, a hollow air conveying pipe rotatably arranged on the fixed pipe and extending through the end face of the treatment box to the outside, a plurality of air outlet nozzles for spraying air flow are uniformly arranged on one side of the outer surface of the hollow air conveying pipe in the axial direction, and the outer end of the hollow air conveying pipe is open and is provided with an air pump matched in use through a hose.

[0013] Further, the inner wall of the treatment box is oppositely provided with two straight slides which are respectively slidably connected with the fixed pipe and the hollow air conveying pipe, a first sliding block is rotatably arranged on the hollow air conveying pipe and slides in the straight slide, a first connecting rod is arranged at the end of the first sliding block and extends to the outside through the corresponding straight slide, and a reciprocating assembly for driving the fixed pipe and the hollow air conveying pipe to reciprocate is arranged at the outer end of the first connecting rod.

[0014] The reciprocating assembly comprises a first supporting plate rotatably arranged on the first connecting rod, a second supporting plate rotatably arranged on the first supporting plate away from the first connecting rod, and a second connecting rod arranged at the end of the second supporting plate away from the first supporting plate.

[0015] Further, one end of the power shaft is provided with a ring-shaped groove block, a third connecting rod is movably arranged in the ring-shaped groove block, a rectangular supporting frame is arranged on the outer wall of the treatment box, a second sliding block is movably arranged in the rectangular supporting frame and sleeved on the third connecting rod, and a transmission assembly one for overturning the hollow air conveying pipe is arranged on the outer part of the third connecting rod.

[0016] The transmission assembly one comprises a vertical plate sleeved on the outer part of the third connecting rod and a rack arranged at the lower end of the vertical plate, a first gear is arranged on the rack, and the first gear is sleeved and fixed on the hollow air conveying pipe.

[0017] Further, a second gear is further arranged on the outer part of the third connecting rod, two transmission assemblies two which are respectively meshingly connected with the coal crushing assembly and the back-blowing mechanism are matched arranged on the second gear.

[0018] The transmission assembly two comprises a third gear meshing or non-meshing on the second gear, a first pulley coaxially arranged on the third gear, and a transmission belt arranged on the first pulley, and the other end of the transmission belt is provided with a second pulley.

[0019] Further, the coal crushing assembly comprises two oppositely arranged coal crushing rollers in the treatment box, and a gear transmission unit correspondingly arranged at the end of the coal crushing rollers and used for driving the two coal crushing rollers to rotate towards each other and crush the coal blocks.

[0020] When the third connecting rod moves in the direction of the coal crushing assembly in the rectangular support frame, the second gear is engaged with the second pulley sleeved on the central shaft, so that the two coal crushing rollers are synchronized and moved with the vibration mechanism, and the coal powder on the filter plate is shaken down while the coal blocks are crushed.

[0021] When the third connecting rod moves in the direction of the reverse blowing air mechanism in the rectangular support frame, the second gear is engaged with the second pulley sleeved on the second connecting rod, so that the fixed pipe and the hollow air pipe move horizontally reciprocatingly in the treatment box, and the vibration mechanism is driven to vibrate the coal powder on the filter plate, and the coal powder on the filter plate is blown away under the action of the reverse air flow.

[0022] Further, the treatment box is composed of a cylinder and a tapered-gradually expanded section formed on the cylinder, the narrow part of the tapered-gradually expanded section is provided with two oppositely arranged negative pressure openings, and the outside of the narrow part is rotatably provided with a support ring plate, and the support ring plate is oppositely provided with two through openings for closing or opening.

[0023] Further, the top of the tapered-gradually expanded section is adaptively provided with a discharging guide plate for slowly discharging coal blocks.

[0024] Compared with the prior art, the present application has the following beneficial effects: the vibration mechanism can crush the coal blocks entering the treatment box under the action of the coal crushing assembly, shake the crushed coal powder, avoid the accumulation of coal powder on the filter plate, and help to speed up the screening and filtering operation of the coal powder; the reverse blowing air mechanism cooperates with the vibration mechanism to drive the vibration mechanism to vibrate the residual coal powder on the filter plate, and blow the coal powder on the filter plate under the action of the reverse air flow, effectively solving the problem of residual coal powder on the filter plate, and ensuring the good filtering property of the filter plate. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 A three-dimensional structural diagram of an embodiment of the present invention from one perspective;

[0027] Figure 2 A perspective structural diagram of a partial cross-section of an embodiment of the present invention;

[0028] Figure 3 A three-dimensional structural diagram of the internal structure of an embodiment of the present invention from one perspective;

[0029] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;

[0030] Figure 5 A three-dimensional structural diagram of the internal structure of an embodiment of the present invention from another perspective;

[0031] Figure 6 for Figure 5 The enlarged structural diagram at B in the middle;

[0032] Figure 7 It is a schematic diagram of a partial cross-section of the overall front plan structure of an embodiment of the present invention;

[0033] Figure 8 A schematic diagram of a partial cross-sectional side plan view of an embodiment of the present invention;

[0034] Figure 9 for Figure 8 Enlarged structural diagram at point C in the middle.

[0035] In the figure: 100, processing box; 101, coal crushing assembly; 1011, coal crushing roller; 1012, gear transmission unit; 1013, central shaft; 1, filter plate; 2, vibration mechanism; 21, power shaft; 22, cam block; 23, support ring; 24, spring; 25, annular scraper; 26, transmission shaft; 27, worm; 28, worm gear; 29, annular groove block; 3, back-blowing mechanism; 31, fixed pipe; 32, hollow gas transmission pipe; 33, gas outlet nozzle; 34, straight slide; 35 , first slider; 36, first connecting rod; 37, first support plate; 38, second support plate; 39, second connecting rod; 4, third connecting rod; 5, rectangular support frame; 51, second slider; 6, transmission component one; 61, vertical plate; 62, rack; 63, first gear; 7, second gear; 8, transmission component two; 81, third gear; 82, first pulley; 83, transmission belt; 84, second pulley; 9, negative pressure port; 91, support ring plate; 911, through port; 10, blanking guide plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] like Figure 1-9 As shown, the coal crushing device of the present invention includes a processing box 100, a coal crushing assembly 101 arranged in the processing box 100 for crushing the coal, and a filter plate 1 for filtering and screening the crushed coal blocks.

[0038] a vibration mechanism 2, provided on the filter plate 1, for vibrating the filter plate 1 and shaking the pulverized coal passing through the filter plate 1 into the lower side of the processing box 100;

[0039] The reverse blowing mechanism 3 is provided in the processing box 100 and placed on the lower side of the filter plate 1 , and is used for pumping gas to reversely blow the coal powder on the filter plate 1 .

[0040] In a specific implementation, the coal crushing assembly 101 installed on the top of the processing box 100 can crush the coal lumps entering the processing box 100. The crushed coal powder will fall on the filter plate 1. At this time, the vibration mechanism 2 is activated to produce a vibration effect, which quickly screens the coal powder on the filter plate 1, avoiding the phenomenon of coal powder accumulating on the filter plate 1 and causing blockage, thereby speeding up the screening and filtering operation of the coal powder.

[0041] During the later cleaning and maintenance process, the vibration mechanism 2 and the back-blowing mechanism 3 are operated synchronously. The reverse airflow generated by the back-blowing mechanism 3 will blow the filter plate 1 in the reverse direction. Since some coal powder will remain in the dead corner, the coal powder on the filter plate 1 will be effectively blown away under the vibration effect of the vibration mechanism 2, solving the problem of coal powder remaining on the filter plate 1 and ensuring the smooth progress of the next operation.

[0042] It should be noted that, during the cleaning and purging process, a collection box for negative pressure suction of coal powder can be placed outside the top opening of the processing box 100 to prevent the coal powder from escaping.

[0043] In one embodiment, the vibration mechanism 2 comprises a power shaft 21 mounted on the underside of the filter plate 1, cam blocks 22 symmetrically mounted on the power shaft 21 and abutting the bottom surface of the filter plate 1. Support rings 23 are mounted on both ends of the power shaft 21 and fixed to the inner wall of the treatment box 100. The edges of the support rings 23 are provided with several springs 24 elastically connected to the filter plate 1. This design utilizes the power shaft 21 mounted a distance apart on the underside of the filter plate 1, the cam blocks 22 symmetrically mounted on both sides of the power shaft 21, and the support rings 23 welded to the inner wall of the treatment box 100. The ends of the power shaft 21 are rotatably connected to corresponding protrusions on the support rings 23. When the power shaft 21 rotates under external force, it drives the two symmetrically welded cam blocks 22 to rotate. Because the filter plate 1 and the support rings 23 are elastically connected via the springs 24, the springs 24 provide a spring effect that allows the rotation of the cam blocks 22 to vibrate the filter plate 1 upward and downward, thereby shaking off the coal dust.

[0044] In one embodiment, the vibration mechanism 2 further includes an annular scraper 25 provided on the filter plate 1 and configured to rotate along the circumference of the filter plate 1 to scrape the filter holes on the surface of the filter plate 1. A transmission shaft 26 is provided on the annular scraper 25 at the center of the filter plate 1. The transmission shaft 26 is provided with a worm gear transmission structure that rotates following the power shaft 21.

[0045] The worm and worm gear transmission structure includes a worm 27 mounted on the power shaft 21 and a worm wheel 28 meshingly disposed on the side of the worm 27 and sleeved on the transmission shaft 26. This design utilizes an annular scraper 25 mounted on the upper surface of the filter plate 1, a transmission shaft 26 mounted on the annular scraper 25 at the center of the filter plate 1, a worm 27 welded to a section of the power shaft 21, and a worm wheel 28 sleeved and fixed on the transmission shaft 26. As the worm 27 rotates with the power shaft 21, the meshing of the worm 27 and the worm wheel 28 drives the transmission shaft 26, which is fixedly mounted on the end face of the worm wheel 28, to rotate. This causes the annular scraper 25 mounted on the top end of the transmission shaft 26 to rotate circumferentially on the upper surface of the filter plate 1, thereby scraping the filter holes on the surface of the filter plate 1.

[0046] It should be noted that the upper surface of the annular scraper 25 is installed with an upper support ring frame fixed to the inner wall of the processing box 100, and the lower surface of the annular scraper 25 is installed with bristles of different lengths, and the relative positions of the worm wheel 28 installed on the transmission shaft 26 and the worm 27 installed on the power shaft 21 are kept relatively fixed by a fixing frame, and the worm wheel 28 and the worm 27 are always kept in meshing connection. When the filter plate 1 is vibrated up and down by external force, the vibration gap between the changing annular scraper 25 and the filter plate 1 will be compensated by the bristles of different lengths, and the coal powder on the filter plate 1 can be scraped in a circumferential direction.

[0047] In one embodiment, the back-blowing mechanism 3 includes a fixed tube 31 arranged on one side of the inner wall of the processing box 100, and a hollow air supply pipe 32 rotatably arranged on the fixed tube 31 and extending to the outside through the end face of the processing box 100. A plurality of air outlet nozzles 33 for spraying air flow are evenly arranged axially on one side of the outer surface of the hollow air supply pipe 32, and the outer end of the hollow air supply pipe 32 is opened and an air pump suitable for use is provided through a hose. This design is based on the horizontal and vertical welding of a fixed pipe 31 on one side of the inner wall of the processing box 100, and the hollow gas pipe 32 that is rotatably installed with a rotating groove at the opening position of the fixed pipe 31, and several gas outlet nozzles 33 evenly distributed on one side of the hollow gas pipe 32. When an air pump is installed in connection with the outer end of the hollow gas pipe 32, the air flow can be pumped into the interior of the processing box 100 through the gas outlet nozzles 33. Since the hollow gas pipe 32 is rotatably connected to the fixed pipe 31, during the process of crushing the coal blocks, the side where the gas outlet nozzles 33 are installed will be rotated downward to prevent the crushed coal powder blocks from falling and clogging the nozzles of the gas outlet nozzles 33. Only during the reverse purge process, the hollow gas pipe 32 is rotated so that the side of the hollow gas pipe 32 with the gas outlet nozzles 33 faces upward, forming a vertical upward airflow.

[0048] In one embodiment, two straight slides 34 are disposed on the inner wall of the processing box 100, which are respectively slidably connected to the fixed tube 31 and the hollow gas pipe 32. A first slider 35 is rotatably disposed on the hollow gas pipe 32 and slides within the straight slide 34. The end of the first slider 35 is provided with a first connecting rod 36 that passes through the straight slide 34 on the corresponding side and extends to the outside. The outer end of the first connecting rod 36 is provided with a reciprocating assembly for driving the fixed tube 31 and the hollow gas pipe 32 to reciprocate.

[0049] The reciprocating assembly includes a first support plate 37 rotatably provided on the first connecting rod 36 , a second support plate 38 rotatably provided on the first supporting plate 37 at one end away from the first connecting rod 36 , and a second connecting rod 39 is provided on the end of the second supporting plate 38 away from the first supporting plate 37 . This design uses two straight slides 34 welded relative to each other in the processing box 100, and the fixed tube 31 and the hollow gas pipe 32 slide in the straight slide 34 through the first slider 35, and the end face of the first slider 35 rotatably installed on the hollow gas pipe 32 is vertically welded to the first connecting rod 36, so that the first connecting rod 36 passes through the processing box 100 and extends to the outside to be rotatably connected to the reciprocating component. Since the reciprocating component is composed of a first support plate 37 and a second support plate 38, when the second connecting rod 39 installed at one end of the second support plate 38 is rotated by an external force, it will drive the hollow gas pipe 32 to reciprocate under the guide limit of the straight slides 34 on both sides through the structure of the first support plate 37 and the second support plate 38, so that the injection of the vertical airflow in the processing box 100 remains uniform.

[0050] In one embodiment, an annular groove block 29 is provided at one end of the power shaft 21, and a third connecting rod 4 is movably provided in the annular groove block 29. A rectangular support frame 5 is provided on the outer wall of the processing box 100, and a second slider 51 sleeved on the third connecting rod 4 is movably provided in the rectangular support frame 5. A transmission component 6 for flipping the hollow gas pipe 32 is provided on the outside of the third connecting rod 4.

[0051] The transmission assembly one 6 comprises a vertical plate 61 sleeved outside the third connecting rod 4, a rack 62 arranged at the lower end of the vertical plate 61, a first gear 63 arranged on the rack 62, and the first gear 63 is sleeved and fixed on the hollow air conveying pipe 32. In this way, by welding a ring-shaped groove block 29 at the outer end of the power shaft 21, and by arranging a sliding groove on the inner wall of the ring-shaped groove block 29 and allowing the third connecting rod 4 to slide, a rectangular support frame 5 is welded on the outer wall of the processing box 100, and a sliding groove is arranged on the inner wall of the rectangular support frame 5 to allow the second sliding block 51 sleeved on the third connecting rod 4 to slide, when the second sliding block 51 moves, the third connecting rod 4 can be synchronously driven to move in the corresponding ring-shaped groove block 29, so that the vertical plate 61 sleeved on the third connecting rod 4 and the rack 62 welded at the lower end of the vertical plate 61 move horizontally, due to the engagement of the first gear 63 on the lower surface of the rack 62, the first gear 63 sleeved outside the hollow air conveying pipe 32 is driven to rotate through the engagement transmission structure of the rack and gear, and the overturning of the hollow air conveying pipe 32 relative to the fixed pipe 31 is realized, so that the orientation of the side of the hollow air conveying pipe 32 on which the air outlet nozzle 33 is installed can be changed.

[0052] It should be noted that the outer end of the second sliding block 51 is provided with a motor connected in transmission with the third connecting rod 4.

[0053] In an embodiment, the outer portion of the third connecting rod 4 is further provided with a second gear 7, and two transmission assemblies two 8 are adaptively arranged on the second gear 7 and engaged with the coal crushing assembly 101 and the back-blowing air mechanism 3, respectively.

[0054] The transmission assembly two 8 comprises a third gear 81 engaged or not engaged on the second gear 7, a first pulley 82 coaxially arranged on the third gear 81, a transmission belt 83 arranged on the first pulley 82, and a second pulley 84 arranged at the other end of the transmission belt 83. In this way, by sleeving and installing the second gear 7 on the third connecting rod 4 and adaptively arranging two transmission assemblies two 8 on the second gear 7, the second gear 7 can be used to differentially transmit force to the two transmission assemblies two 8.

[0055] It should be noted that the transmission assembly two 8 comprises the third gear 81 and the first pulley 82 coaxially arranged, the transmission belt 83 wound outside the first pulley 82, and the second pulley 84 wound at the other end of the transmission belt 83, wherein one of the second pulleys 84 in the two transmission assemblies two 8 is coaxially arranged with the second connecting rod 39, and the other second pulley 84 is coaxially arranged with the shaft rod formed on the coal crushing assembly 101.

[0056] In one embodiment, the coal crushing assembly 101 includes two coal crushing rollers 1011 disposed opposite to each other in the processing box 100, and a gear transmission unit 1012 disposed at the ends of the coal crushing rollers 1011 and used to drive the two coal crushing rollers 1011 to rotate toward each other and crush the coal blocks. A central shaft 1013 is disposed at the end of the central gear in the gear transmission unit 1012. The outer end of the central shaft 1013 is fixedly sleeved with the second pulley 84 distributed on one side, and the second pulley 84 distributed on the other side is fixedly sleeved with the second connecting rod 39.

[0057] When the third connecting rod 4 moves in the rectangular support frame 5 toward the coal crushing assembly 101, the second gear 7 is meshed and connected with the second pulley 84 sleeved on the central shaft 1013, so that the two coal crushing rollers 1011 move synchronously with the vibration mechanism 2, crushing the coal blocks while shaking the coal powder on the filter plate 1 up and down;

[0058] When the third connecting rod 4 moves within the rectangular support frame 5 toward the reverse air blowing mechanism 3, the second gear 7 engages with the second pulley 84 mounted on the second connecting rod 39, causing the fixed tube 31 and the hollow air pipe 32 to reciprocate horizontally within the processing box 100, while driving the vibration mechanism 2 to vibrate the coal powder on the filter plate 1 and, under the action of the reverse airflow, purge the coal powder on the filter plate 1. This design utilizes two opposing coal crushing rollers 1011 mounted at the top of the processing box 100, and a gear transmission unit 1012 mounted at the ends of the coal crushing rollers 1011. The gear transmission unit 1012 comprises two coaxially mounted gears on the coal crushing rollers 1011, with the two gears meshing with a central gear. When the central gear is powered, the force transmitted through the two symmetrically meshed gears on either side of the central gear drives the two coal crushing rollers 1011 to rotate in opposite directions, thereby squeezing and crushing the coal lumps between the two coal crushing rollers 1011.

[0059] It should be noted that the central shaft 1013 fixedly passed through the end of the central gear is fixedly sleeved with the second pulley 84 in one of the transmission components 8.

[0060] In one embodiment, the processing box 100 is composed of a cylinder and a converging-diverging section formed on the cylinder. The narrow portion of the converging-diverging section is provided with two oppositely opened negative pressure ports 9. A support ring plate 91 is provided on the outside of the narrow portion for rotation. The support ring plate 91 is provided with two oppositely opened openings 911 for closing or opening. This design, through the converging-diverging section integrally formed on the cylinder formed on the processing box 100, forms a Venturi tube structure. The two negative pressure ports 9 provided in the narrow portion of the converging-diverging section, during the purge process, utilize the Venturi effect to generate local negative pressure through the negative pressure ports 9, thereby accelerating the vertical airflow passing through the area between the two coal crushing rollers 1011 and impacting the coal powder adhered to the surface of the coal crushing rollers 1011, thereby achieving a good back-purge effect.

[0061] It should be noted that the support ring plate 91 rotatably installed outside the narrow part can close the narrow part through the two through-holes 911 opened on the support ring plate 91 and the staggered distribution with the negative pressure port 9, thereby ensuring the normal crushing operation of the coal blocks in the processing box 100.

[0062] In one embodiment, a discharge guide plate 10 is adapted to be installed at the top of the converging-diverging section for slowly discharging coal lumps. This design allows the coal lumps to flow smoothly into the crushing area between the two coal crushing rollers 1011 through the discharge guide plate 10 installed at the top of the converging-diverging section and the guide opening provided on the discharge guide plate 10, which is adapted to the discharge opening between the two oppositely spaced coal crushing rollers 1011.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0064] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0065] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, "several" means more than two. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist, nor is it within the scope of protection required by the present application.

Claims

1. A coal crushing device for coal combustion, comprising a processing box (100), a coal crushing assembly (101) arranged in the processing box (100) for crushing coal combustion, characterized in that: The processing box (100) is further provided with a filter plate (1) for filtering and screening the crushed coal blocks; a vibration mechanism (2) cooperatively arranged on the filter plate (1) for vibrating the filter plate (1) and shaking the coal powder passing through the filter plate (1) into the lower side of the processing box (100); A reverse blowing mechanism (3) is provided in the processing box (100) and placed on the lower side of the filter plate (1), and is used to pump in gas to reversely blow the coal powder on the filter plate (1).

2. The coal crushing device according to claim 1, characterized in that: The vibration mechanism (2) comprises a power shaft (21) arranged on the lower side of the filter plate (1), a cam block (22) symmetrically arranged on the power shaft (21) and abutting against the bottom surface of the filter plate (1), support rings (23) fixed to the inner wall of the processing box (100) are provided at both ends of the power shaft (21), and a plurality of springs (24) elastically connected to the filter plate (1) are provided at the edge of the support ring (23).

3. The coal crushing device according to claim 2, characterized in that: The vibration mechanism (2) further comprises an annular scraper (25) arranged on the filter plate (1) and used for rotating along the circumference of the filter plate (1) to scrape the filter holes on the surface of the filter plate (1); a transmission shaft (26) is provided on the annular scraper (25) at the center of the filter plate (1); and a worm gear transmission structure is provided on the transmission shaft (26) that rotates following the power shaft (21); The worm and worm gear transmission structure comprises a worm (27) arranged on the power shaft (21) and a worm wheel (28) meshingly arranged on the side of the worm (27) and sleeved on the transmission shaft (26).

4. The coal crushing device according to claim 3, characterized in that: The back-blowing mechanism (3) comprises a fixed pipe (31) arranged on one side of the inner wall of the processing box (100), a hollow air supply pipe (32) rotatably arranged on the fixed pipe (31) and penetrating the end surface of the processing box (100) to extend to the outside, a plurality of air outlet nozzles (33) for spraying air flow are evenly arranged along the axial direction on one side of the outer surface of the hollow air supply pipe (32), and the outer end of the hollow air supply pipe (32) is open and an air pump suitable for use is provided through a hose.

5. The coal crushing device for burning coal according to claim 4, characterized in that: Two straight slides (34) are arranged on the inner wall of the processing box (100) and are respectively connected to the fixed pipe (31) and the hollow gas pipe (32) in a sliding manner. A first slider (35) is rotatably arranged on the hollow gas pipe (32) and slides in the straight slide (34). The end of the first slider (35) is provided with a first connecting rod (36) that passes through the straight slide (34) on the corresponding side and extends to the outside. The outer end of the first connecting rod (36) is provided with a reciprocating component for driving the fixed pipe (31) and the hollow gas pipe (32) to move back and forth. The reciprocating assembly includes a first support plate (37) rotatably arranged on the first connecting rod (36), a second support plate (38) rotatably arranged on one end of the first support plate (37) away from the first connecting rod (36), and a second connecting rod (39) is arranged on one end of the second support plate (38) away from the first supporting plate (37).

6. The coal crushing device for burning coal according to claim 5, characterized in that: An annular groove block (29) is provided at one end of the power shaft (21), a third connecting rod (4) is movably provided in the annular groove block (29), a rectangular support frame (5) is provided on the outer wall of the processing box (100), a second slider (51) sleeved on the third connecting rod (4) is movably provided in the rectangular support frame (5), and a transmission component (6) for flipping the hollow gas pipe (32) is provided on the outside of the third connecting rod (4); The transmission assembly (6) includes a vertical plate (61) sleeved on the outside of the third connecting rod (4), a rack (62) provided at the lower end of the vertical plate (61), a first gear (63) provided on the rack (62), and the first gear (63) sleeved and fixed on the hollow air supply pipe (32).

7. The coal crushing device for burning coal according to claim 6, characterized in that: A second gear (7) is further provided on the outside of the third connecting rod (4), and the second gear (7) is adapted to be provided with two transmission assemblies (8) respectively meshing with the coal crushing assembly (101) and the reverse air blowing mechanism (3); The second transmission component (8) includes a third gear (81) meshed or non-meshed with the second gear (7), a first pulley (82) coaxially arranged on the third gear (81), a transmission belt (83) is arranged on the first pulley (82), and a second pulley (84) is arranged at the other end of the transmission belt (83).

8. The coal crushing device according to claim 7, characterized in that: The coal crushing assembly (101) comprises two coal crushing rollers (1011) arranged opposite to each other in the processing box (100), and a gear transmission unit (1012) correspondingly arranged at the ends of the coal crushing rollers (1011) and used to drive the two coal crushing rollers (1011) to rotate in opposite directions and squeeze and crush coal blocks. A central shaft (1013) is provided at the end of the central gear in the gear transmission unit (1012). The outer end of the central shaft (1013) is fixedly sleeved with the second belt pulley (84) distributed on one side, and the second belt pulley (84) distributed on the other side is fixedly sleeved with the second connecting rod (39). When the third connecting rod (4) moves in the direction of the coal crushing assembly (101) in the rectangular support frame (5), the second gear (7) is meshed and connected with the second pulley (84) sleeved on the central shaft (1013), so that the two coal crushing rollers (1011) move synchronously with the vibration mechanism (2), crushing the coal blocks while shaking the coal powder on the filter plate (1) up and down; When the third connecting rod (4) moves in the direction of the reverse air blowing mechanism (3) in the rectangular support frame (5), the second gear (7) is meshed and connected with the second pulley (84) sleeved on the second connecting rod (39), so that the fixed pipe (31) and the hollow air pipe (32) move horizontally back and forth in the processing box (100), and at the same time drive the vibration mechanism (2) to vibrate the coal powder on the filter plate (1), and blow the coal powder on the filter plate (1) under the action of the reverse airflow.

9. The coal crushing device for burning coal according to claim 1, characterized in that: The treatment box (100) is composed of a cylinder and a gradually converging-diverging section formed on the cylinder. The narrow portion of the gradually converging-diverging section is provided with two negative pressure ports (9) opened opposite to each other. A supporting ring plate (91) is provided on the outside of the narrow portion for rotation. Two openings (911) for closing or opening are provided opposite to each other on the supporting ring plate (91).

10. The coal crushing device for burning coal according to claim 9, characterized in that: The top of the gradually converging and expanding section is adapted to be provided with a feeding guide plate (10) for slowly feeding coal blocks.

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