Coal falling prevention device of coal conveying belt for power plant

Abstract

The invention relates to the technical field of power plant coal conveying, and discloses a power plant coal conveying belt coal falling prevention device which comprises a supporting mechanism, a conveying mechanism is arranged at the upper end of the supporting mechanism, a driving mechanism is installed on one side of the conveying mechanism, and a rotating mechanism is arranged at the upper end of the conveying mechanism. The rotating mechanism comprises a supporting leg fixedly installed at the upper end of the supporting mechanism, a middle shaft is fixedly installed at the upper end of the supporting leg, two first rotating rollers are rotatably installed on the middle shaft, a plurality of first guide plates and a plurality of second guide plates are further arranged on a rotating belt, and the first guide plates and the second guide plates are arranged on the rotating belt. Therefore, the coal briquettes in conveying can be borne and prevented from falling off, the shear strength of the conveying face of the conveying mechanism is improved, the first guide plate, the second guide plate and the third guide plate are all obliquely attached to the face of the conveying mechanism, the coal briquettes can be conveniently concentrated in the middle of the conveying mechanism, scattered falling of the coal briquettes is reduced, and the conveying efficiency is improved. And the risk of overall slipping is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coal transportation in power plants, and in particular to a coal-falling prevention device for a coal conveyor belt used in power plants. Background Art

[0002] A power plant, also known as a power station, is a factory that converts various primary energy sources stored in nature into electrical energy (secondary energy). In the actual operation of a thermal power plant, the coal transportation system is the most critical equipment. During the transportation process, coal blocks are prone to slide to both sides, resulting in waste of coal blocks.

[0003] For example, a coal conveyor belt anti-coal falling device for a power plant with announcement number CN116374542A belongs to the technical field of coal conveying in power plants; it comprises: a main mounting frame, and an adapting mounting mechanism is arranged in the middle and both sides of the main mounting frame, a height adjustment mechanism is arranged inside one side of the adapting mounting mechanism and inside the main mounting frame, and a length adjustment mechanism is arranged inside the height adjustment mechanism, and spring-mounted wall-attaching mechanisms are arranged at the front ends of both sides of the length adjustment mechanism; the adapting mounting mechanism comprises a first screw rod sliding sleeve, and a first positive and negative screw rod is arranged in the middle of the first screw rod sliding sleeve, the main mounting frame is provided with a sub-mounting frame along the middle opposite surface of the first positive and negative screw rods, a mounting frame is arranged outside the first positive and negative screw rods, and a first driving motor is arranged at one end of the mounting frame. This invention has the effect of preventing coal from falling, and also ensures the split portability between the coal conveyor belt and the anti-coal falling device, as well as the adaptability between the anti-coal falling device and coal conveyor belts of different widths.

[0004] When the coal blocks are transported to a higher position, the slope of the conveyor belt is steeper. The higher the coal blocks are transported, the greater the gravity applied to the conveyor belt. When the shear stress on a certain sliding surface of the conveyor belt exceeds the shear strength of that surface, the conveyor belt at the lower end will find it difficult to withstand the gravity of the overlapping coal blocks. Not only will the coal blocks fall apart, but they will also be prone to the risk of sliding as a whole, affecting the transportation of the entire conveyor belt and the coal transportation efficiency.

[0005] Therefore, we propose a coal-falling prevention device for a coal conveyor belt used in a power plant to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a coal-fall prevention device for a coal conveyor belt in a power plant, so as to solve the problem raised in the above background technology that when the shear stress on a certain sliding surface of the conveyor belt exceeds the shear strength of the surface, the coal blocks will not only fall scatteredly, but also easily have the risk of sliding as a whole.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal conveying belt anti-coal falling device for a power plant, comprising a support mechanism, a conveying mechanism is arranged at the upper end of the support mechanism, a driving mechanism is installed at one side of the conveying mechanism, a rotating mechanism is arranged at the upper end of the conveying mechanism, the rotating mechanism comprises a support leg fixedly installed at the upper end of the support mechanism, a central axis is fixedly installed at the upper end of the support leg, a first rotating roller is rotatably installed on the central axis, two first rotating rollers are arranged, and a rotating belt is commonly connected to the two first rotating rollers; A guide mechanism is provided at the upper end of the rotating mechanism, and the guide mechanism includes a first guide plate provided at the upper end of the conveying mechanism, a limit block fixedly installed on one side of the first guide plate, and a second guide plate fixedly installed on both sides of the first guide plate, the limit block is provided on the conveying mechanism, and the two second guide plates are both inclined on the first guide plate, and a third guide plate is also rotatably installed on the upper end of the second guide plate, and the third guide plate is elastically connected to the second guide plate through a buffer mechanism.

[0008] Preferably, the support mechanism comprises a plurality of support frames, a stabilizing rod is commonly connected between the plurality of support frames, a support frame is fixedly mounted on the upper end of the support frame, and a mounting plate is fixedly mounted on one side of the upper end of the support frame.

[0009] Preferably, the conveying mechanism comprises a first conveying roller and a second conveying roller rotatably mounted on the upper end of the supporting frame, and a conveying belt is commonly connected to the first conveying roller and the second conveying roller.

[0010] Preferably, the driving mechanism comprises a motor fixedly mounted on the upper end of the mounting plate, a rotating shaft is fixedly mounted on the output end of the motor, and the rotating shaft is fixedly connected to the first conveying roller.

[0011] Preferably, a limiting mechanism is provided at the upper end of the supporting mechanism, and the limiting mechanism includes a first connecting frame fixedly mounted on the supporting frame and a first inner roller shaft rotatably mounted on the upper end of the first connecting frame, one side of the first inner roller shaft is mounted on the second inner roller shaft through a second connecting frame, and an inner rod is fixedly mounted in the middle of the second inner roller shaft.

[0012] Preferably, a limiting shaft is installed between the two first rotating rollers, a plurality of buffer grooves are provided at the upper end of the rotating belt, a belt transmission structure is fixedly installed on one of the central shafts, and one end of the belt transmission structure is also fixedly connected to the rotating shaft.

[0013] Preferably, a connecting block is fixedly installed at one end of the second guide plate, and two clamping blocks are fixedly installed at one end of the connecting block. The two clamping blocks are arranged on both sides of the rotating belt, and a sliding block is also fixedly installed on the inner wall of the clamping block. The sliding block is slidably installed in the buffer groove, and a first elastic member is also connected between the sliding block and the buffer groove.

[0014] Preferably, a rubber pad is fixedly installed at one end of the third guide plate, and the rubber pad is also fixedly connected to the side wall of the second guide plate. A buffer mechanism is also connected between the third guide plate and the second guide plate. Two buffer mechanisms are provided, and the other buffer mechanism is installed in the second inner roller shaft.

[0015] Preferably, the buffer mechanism includes a piston rod slidably connected to the second inner roller shaft and a damper sleeve slidably mounted on one side of the piston rod, the damper sleeve is also fixedly mounted on the outer periphery of the inner rod, the outer peripheries of the piston rod and the damper sleeve are jointly provided with a second elastic member, and a damping block slidably connected to the damper sleeve is also fixedly mounted on one end of the piston rod.

[0016] Preferably, a protective mechanism is also provided at the upper end of the guide mechanism, and the protective mechanism includes two side panels fixedly installed on the upper end of the support frame, and a top plate is fixedly installed on the upper ends of the two side panels. The top plate is arranged at the upper end of the guide mechanism, and avoidance grooves are provided on the upper and lower sides of the top plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The conveying mechanism is placed at an oblique upward angle. After starting, the coal blocks are conveyed obliquely upward. The coal blocks hit the first guide plate, the second guide plate and the third guide plate. Multiple first guide plates and second guide plates are also on the rotating belt, so they can bear the weight and prevent the coal blocks from falling during transportation, thereby increasing the shear strength of the conveying surface of the conveying mechanism. The first guide plate, the second guide plate and the third guide plate are all obliquely fitted on the surface of the conveying mechanism, which is convenient for concentrating the coal blocks in the middle of the conveying mechanism, which not only reduces the scattered falling of coal blocks, but also reduces the risk of overall sliding.

[0018] 2. After the motor is started, the rotating shaft, the belt drive structure and the central shaft can rotate. Therefore, after the device is turned on, the rotating belt can be automatically turned on to ensure that the two can run at the same time, and the rotation speed of the rotating belt is not less than the rotation speed of the conveying mechanism, which is convenient for the synchronous drive and operation of the two. Through the cooperation between the second guide plate, the connecting block, the clamping block and the rotating belt, multiple first guide plates and second guide plates can be fixed on the rotating belt and rotate with the rotation of the rotating belt.

[0019] 3. Multiple first guide plates, second guide plates and third guide plates divide the conveyor belt into zones. When one zone is too heavy and is about to slide down, its gravity is first applied to the third guide plate and the buffer mechanism. If the third guide plate is not sufficient to resist the gravity of the coal blocks, it will drive the first guide plate system to move downward as a whole, that is, the sliding block squeezes the first elastic member to slide in the buffer groove, buffering and bearing the coal blocks in the zone, further increasing the risk of coal blocks falling.

[0020] 4. Through the cooperation among the piston rod, the damper sleeve and the damping block, when the piston rod is squeezed to the damping block by force, the damping block moves in the sealed damper sleeve, and will not reset quickly but slowly, thus reducing the coal blocks from falling due to splashing. The side panels and the top panel are combined into an outer frame structure, and there are only two upper and lower avoidance grooves as openings. Even if the coal blocks splash, they will be blocked by the side panels and the top panel and will not fall to the ground, thus further playing a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the supporting mechanism and conveying mechanism structure of the present invention; Figure 3 It is a schematic diagram of the structure of the conveying mechanism and the guiding mechanism of the present invention; Figure 4 It is a schematic diagram of the rotating mechanism structure of the present invention; Figure 5 It is a schematic diagram of the structure of the guide mechanism of the present invention; Figure 6 It is a plan view of the guide mechanism of the present invention; Figure 7 It is a schematic diagram of the structure of the rotating mechanism and the guiding mechanism of the present invention; Figure 8 It is an overall cross-sectional view of the present invention; Fig. 9 For the present invention Figure 8 Enlarged view of point A in the middle.

[0022] In the figure: 1, support mechanism; 11, support frame; 12, stabilizing rod; 13, support frame; 14, mounting plate; 2, conveying mechanism; 21, first conveying roller; 22, second conveying roller; 23, conveying belt; 3, driving mechanism; 31, motor; 32, rotating shaft; 4, limiting mechanism; 41, first connecting frame; 42, first inner roller shaft; 43, second connecting frame; 44, second inner roller shaft; 45, inner rod; 5, rotating mechanism; 51, supporting leg; 52, middle shaft; 53, first rotating roller; 5 4. Limiting shaft; 55. Rotating belt; 56. Buffer groove; 57. Belt transmission structure; 6. Guide mechanism; 61. First guide plate; 62. Limiting block; 63. Second guide plate; 64. Third guide plate; 65. Rubber pad; 66. Connecting block; 67. Clamping block; 68. Sliding block; 69. First elastic member; 7. Protective mechanism; 71. Side plate; 72. Top plate; 73. Avoiding groove; 8. Buffer mechanism; 81. Piston rod; 82. Damper sleeve; 83. Second elastic member; 84. Damping block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1-Figure 7 A coal conveyor belt anti-coal falling device for a power plant comprises a supporting mechanism 1, a conveying mechanism 2 is arranged on the upper end of the supporting mechanism 1, a driving mechanism 3 is installed on one side of the conveying mechanism 2, the driving mechanism 3 is used to drive the conveying mechanism 2, the conveying mechanism 2 drives the coal blocks to be conveyed to one side, a rotating mechanism 5 is arranged on the upper end of the conveying mechanism 2, the rotating mechanism 5 comprises a supporting leg 51 fixedly installed on the upper end of the supporting mechanism 1, a central axis 52 is fixedly installed on the upper end of the supporting leg 51, a first rotating roller 53 is rotatably installed on the central axis 52, two first rotating rollers 53 are arranged, a rotating belt 55 is commonly connected to the two first rotating rollers 53, the supporting leg 51 is fixedly installed on the supporting mechanism 1, and is used to connect the rotating belt 55, two rotating belts 55 are arranged, and are respectively arranged on both sides of the upper end of the conveying mechanism 2.

[0025] A guide mechanism 6 is provided at the upper end of the rotating mechanism 5, and the guide mechanism 6 includes a first guide plate 61 arranged at the upper end of the conveying mechanism 2, a limit block 62 fixedly installed on one side of the first guide plate 61, and a second guide plate 63 fixedly installed on both sides of the first guide plate 61. The limit block 62 is arranged on the conveying mechanism 2, and two rotating belts 55 are provided, which are respectively arranged on both sides of the upper end of the conveying mechanism 2, and the second guide plate 63 is installed on the rotating belt 55.

[0026] The two second guide plates 63 are both obliquely arranged on the first guide plate 61, and the conveying mechanism 2 is placed at an oblique upward angle. After starting, the coal blocks are conveyed obliquely upward. The first guide plate 61 is located in the center of the conveying mechanism 2, and the two second guide plates 63 arranged obliquely upward are fixedly installed on both sides of the first guide plate 61, which are used to discharge the coal blocks in the center to reduce the falling of coal blocks.

[0027] A third guide plate 64 is rotatably mounted on the upper end of the second guide plate 63 , and the third guide plate 64 is elastically connected to the second guide plate 63 via a buffer mechanism 8 .

[0028] The inclination angle of the third guide plate 64 is greater than that of the second guide plate 63. When coal blocks are loaded at the bottom of the conveying mechanism 2, the coal blocks first hit the third guide plate 64, and their gravity exerts pressure on the third guide plate 64. Under the action of the buffer mechanism 8, the falling coal blocks are buffered. When the third guide plate 64 is gradually reset, the coal blocks can be further concentrated in the middle position of the conveying mechanism 2, reducing the risk of coal falling.

[0029] Multiple first guide plates 61 and second guide plates 63 are on the rotating belt 55, and their rotation speed is not less than the rotation speed of the conveying mechanism 2. Therefore, they can bear the weight and prevent the coal blocks in transportation from falling, and increase the shear strength of the conveying surface of the conveying mechanism 2. The first guide plate 61, the second guide plate 63 and the third guide plate 64 are all obliquely fitted on the surface of the conveying mechanism 2. The two are separately arranged on the conveying mechanism 2, which can not only fit the flat conveying mechanism 2, but also fit the concave conveying mechanism 2, so as to facilitate the coal blocks to be concentrated in the middle of the conveying mechanism 2, which not only reduces the scattered falling of coal blocks, but also reduces the risk of overall sliding, and has a wide applicability.

[0030] Example 2: Please refer to Figure 1-Figure 4 The support mechanism 1 includes a plurality of support frames 11, and a stabilizing rod 12 is commonly connected between the plurality of support frames 11 for providing stable support for the device. A support frame 13 is fixedly mounted on the upper end of the support frame 11, and a mounting plate 14 is fixedly mounted on one side of the upper end of the support frame 13, so that the base of the device is stable.

[0031] The conveying mechanism 2 includes a first conveying roller 21 and a second conveying roller 22 rotatably mounted on the upper end of the supporting frame 13. The first conveying roller 21 and the second conveying roller 22 are commonly connected to a conveying belt 23. When the coal blocks fall on the conveying belt 23, the first conveying roller 21 and the second conveying roller 22 rotate, which can drive the conveying belt 23 to move upward.

[0032] The driving mechanism 3 includes a motor 31 fixedly mounted on the upper end of the mounting plate 14, and a rotating shaft 32 is fixedly mounted on the output end of the motor 31. The rotating shaft 32 is fixedly connected to the first conveying roller 21. After the motor 31 is started, the rotating shaft 32 and the first conveying roller 21 can rotate, thereby driving the upward movement of the conveying belt 23 and the conveying of coal blocks.

[0033] A limiting mechanism 4 is provided at the upper end of the supporting mechanism 1, and the limiting mechanism 4 includes a first connecting frame 41 fixedly mounted on the supporting frame 13 and a first inner roller shaft 42 rotatably mounted on the upper end of the first connecting frame 41, one side of the first inner roller shaft 42 is mounted on the second inner roller shaft 44 through a second connecting frame 43, and an inner rod 45 is fixedly mounted in the middle of the second inner roller shaft 44.

[0034] Through the cooperation among the first connecting frame 41, the first inner roller 42, the second connecting frame 43, the second inner roller 44 and the inner rod 45, a concave structure is formed as a whole. The bottom of the upper conveying belt 23 is fitted in this concave structure. The first guide plate 61, the second guide plate 63 and the third guide plate 64 are fitted on the conveying belt 23 of the concave structure, which not only increases the bearing capacity of the upper conveying belt 23, but also further increases the gathering effect on the coal blocks, and has a certain stability.

[0035] Example 3: Please refer to Figure 2-Figure 7 , a limiting shaft 54 ​​is installed between the two first rotating rollers 53, and the limiting shaft 54 ​​is higher than the conveying belt 23. The coal blocks are loaded from the bottom of the conveying belt 23 and pass through the limiting shaft 54. The limiting shaft 54 ​​can smooth the accumulated coal blocks, reducing the risk of the coal blocks falling due to excessive accumulation. A belt transmission structure 57 is fixedly installed on one of the middle shafts 52, and one end of the belt transmission structure 57 is also fixedly connected to the rotating shaft 32. The belt transmission structure 57 includes two pulleys and a belt body. The two ends of the belt body are sleeved on the two pulleys, and the two pulleys are respectively connected to the rotating shaft 32 and the middle shaft 52. After the motor 31 is started, the rotating shaft 32, the belt transmission structure 57, and the middle shaft 52 can rotate. Therefore, after the device is turned on, the rotating belt 55 can be automatically turned on to ensure that the two can run at the same time, and the rotation speed of the rotating belt 55 is not less than the rotation speed of the conveying mechanism 2, which is convenient for the synchronous drive and operation of the two.

[0036] A plurality of buffer grooves 56 are provided at the upper end of the rotating belt 55, a connecting block 66 is fixedly installed at one end of the second guide plate 63, two clamping blocks 67 are fixedly installed at one end of the connecting block 66, and the two clamping blocks 67 are arranged on both sides of the rotating belt 55. Through the cooperation among the second guide plate 63, the connecting block 66, the clamping block 67 and the rotating belt 55, a plurality of first guide plates 61 and the second guide plates 63 can be fixed on the rotating belt 55 and rotate with the rotation of the rotating belt 55.

[0037] A sliding block 68 is fixedly mounted on the inner wall of the clamping block 67 . The sliding block 68 is slidably mounted in the buffer groove 56 . A first elastic member 69 is connected between the sliding block 68 and the buffer groove 56 .

[0038] Multiple first guide plates 61, second guide plates 63 and third guide plates 64 divide the conveyor belt 23 into zones. When one zone is too heavy and is about to slide down, its gravity is first applied to the third guide plate 64 and the buffer mechanism 8. If the third guide plate 64 is not sufficient to resist the gravity of the coal blocks, it will drive the first guide plate 61 to move downward as a whole, that is, the sliding block 68 squeezes the first elastic member 69 to slide in the buffer groove 56, thereby buffering and bearing the coal blocks in the zone, further increasing the risk of coal blocks falling.

[0039] Example 4: Please refer to Figure 3-Figure 9 A rubber pad 65 is fixedly installed at one end of the third guide plate 64, and the rubber pad 65 is also fixedly connected to the side wall of the second guide plate 63. When the second guide plate 63 is pressed and rotates on the second guide plate 63, the rubber pad 65 adaptively expands and contracts, reducing the coal blocks from entering the gap between the second guide plate 63 and the third guide plate 64, and has a certain degree of protection.

[0040] A buffer mechanism 8 is also connected between the third guide plate 64 and the second guide plate 63 . Two buffer mechanisms 8 are provided. The two buffer mechanisms 8 have the same structure. Another buffer mechanism 8 is installed in the second inner roller shaft 44 . The buffer mechanism 8 shown in this device is installed in the second inner roller shaft 44 .

[0041] The buffer mechanism 8 includes a piston rod 81 slidably connected to the second inner roller shaft 44 and a damper sleeve 82 slidably mounted on one side of the piston rod 81. The damper sleeve 82 contains a sealed chamber filled with oil. The damper sleeve 82 is also fixedly mounted on the outer periphery of the inner rod 45. A second elastic member 83 is commonly provided on the outer peripheries of the piston rod 81 and the damper sleeve 82. A damping block 84 slidably connected to the damper sleeve 82 is also fixedly mounted on one end of the piston rod 81.

[0042] Through the cooperation among the piston rod 81, the damper sleeve 82 and the damping block 84, when the piston rod 81 is squeezed to the damping block 84 by force, the damping block 84 moves in the sealed damper sleeve 82. The damping block 84 has a certain friction force, and cooperates with the action of the second elastic member 83. Therefore, it will not reset quickly but slowly, thereby reducing the falling of coal blocks due to splashing. The device is equipped with buffer mechanisms 8 in multiple places, which are suitable for damping and buffering of various parts and have good protection effect.

[0043] A protective mechanism 7 is also provided at the upper end of the guide mechanism 6. The protective mechanism 7 includes two side panels 71 fixedly mounted on the upper end of the support frame 13. A top plate 72 is fixedly mounted on the upper ends of the two side panels 71. The top plate 72 is provided at the upper end of the guide mechanism 6. Avoidance grooves 73 are provided on the upper and lower sides of the top plate 72.

[0044] The side panels 71 and the top panel 72 are combined into an outer frame structure, with only two upper and lower avoidance grooves 73 as openings. Even if coal blocks splash, they will be blocked by the side panels 71 and the top panel 72 and will not fall to the ground, thereby further playing a protective role.

[0045] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preventing coal from falling off a coal conveyor belt for a power plant, comprising a support mechanism (1), a conveying mechanism (2) being arranged at the upper end of the support mechanism (1), a driving mechanism (3) being installed at one side of the conveying mechanism (2), and characterized in that: The upper end of the conveying mechanism (2) is provided with a rotating mechanism (5), the rotating mechanism (5) comprising a supporting leg (51) fixedly mounted on the upper end of the supporting mechanism (1), a central shaft (52) fixedly mounted on the upper end of the supporting leg (51), a first rotating roller (53) rotatably mounted on the central shaft (52), two first rotating rollers (53) being provided, and a rotating belt (55) being commonly connected to the two first rotating rollers (53); A guide mechanism (6) is provided at the upper end of the rotating mechanism (5), and the guide mechanism (6) comprises a first guide plate (61) provided at the upper end of the conveying mechanism (2), a limit block (62) fixedly mounted on one side of the first guide plate (61), and second guide plates (63) fixedly mounted on both sides of the first guide plate (61), the limit block (62) being provided on the conveying mechanism (2), the two second guide plates (63) being both obliquely arranged on the first guide plate (61), and a third guide plate (64) being rotatably mounted on the upper end of the second guide plate (63), and the third guide plate (64) being elastically connected to the second guide plate (63) via a buffer mechanism (8).

2. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 1, characterized in that: The support mechanism (1) comprises a plurality of support frames (11), wherein a stabilizing rod (12) is commonly connected between the plurality of support frames (11), a support frame (13) is fixedly mounted on the upper end of the support frame (11), and a mounting plate (14) is fixedly mounted on one side of the upper end of the support frame (13).

3. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 2, characterized in that: The conveying mechanism (2) comprises a first conveying roller (21) and a second conveying roller (22) rotatably mounted on the upper end of the support frame (13); the first conveying roller (21) and the second conveying roller (22) are commonly connected to a conveying belt (23).

4. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 3, characterized in that: The driving mechanism (3) comprises a motor (31) fixedly mounted on the upper end of the mounting plate (14); a rotating shaft (32) is fixedly mounted on the output end of the motor (31); and the rotating shaft (32) is fixedly connected to the first conveying roller (21).

5. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 4, characterized in that: A limiting mechanism (4) is provided at the upper end of the support mechanism (1), the limiting mechanism (4) comprising a first connecting frame (41) fixedly mounted on the support frame (13) and a first inner roller shaft (42) rotatably mounted on the upper end of the first connecting frame (41), a second inner roller shaft (44) being mounted on one side of the first inner roller shaft (42) via a second connecting frame (43), and an inner rod (45) being fixedly mounted in the middle of the second inner roller shaft (44).

6. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 5, characterized in that: A limiting shaft (54) is commonly installed between the two first rotating rollers (53), and a plurality of buffer grooves (56) are provided at the upper end of the rotating belt (55). A belt transmission structure (57) is fixedly installed on one of the central shafts (52), and one end of the belt transmission structure (57) is also fixedly connected to the rotating shaft (32).

7. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 6, characterized in that: A connecting block (66) is fixedly mounted on one end of the second guide plate (63), and two clamping blocks (67) are fixedly mounted on one end of the connecting block (66). The two clamping blocks (67) are arranged on both sides of the rotating belt (55). A sliding block (68) is also fixedly mounted on the inner wall of the clamping block (67). The sliding block (68) is slidably mounted in the buffer groove (56), and a first elastic member (69) is also connected between the sliding block (68) and the buffer groove (56).

8. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 7, characterized in that: A rubber pad (65) is fixedly mounted on one end of the third guide plate (64), and the rubber pad (65) is also fixedly connected to the side wall of the second guide plate (63). A buffer mechanism (8) is also connected between the third guide plate (64) and the second guide plate (63), and two buffer mechanisms (8) are provided, and the other buffer mechanism (8) is mounted in the second inner roller shaft (44).

9. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 8, characterized in that: The buffer mechanism (8) comprises a piston rod (81) slidably connected to the second inner roller (44) and a damper sleeve (82) slidably mounted on one side of the piston rod (81); the damper sleeve (82) is also fixedly mounted on the outer periphery of the inner rod (45); a second elastic member (83) is commonly provided on the outer peripheries of the piston rod (81) and the damper sleeve (82); and a damping block (84) slidably connected to the damper sleeve (82) is also fixedly mounted on one end of the piston rod (81).

10. The device for preventing coal from falling off a coal conveyor belt used in a power plant according to claim 9, characterized in that: A protection mechanism (7) is also provided at the upper end of the guide mechanism (6), the protection mechanism (7) comprising two side plates (71) fixedly mounted on the upper end of the support frame (13), a top plate (72) fixedly mounted on the upper ends of the two side plates (71), the top plate (72) being arranged at the upper end of the guide mechanism (6), and avoidance grooves (73) being provided on both upper and lower sides of the top plate (72).

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