A coal-fired blending device for a thermal power plant

Abstract

The present invention relates to the technical field of coal combustion in thermal power plants, and discloses a coal blending device for thermal power plants. The present invention solves the problem of low uniformity of blending and burning in existing coal blending and burning devices for thermal power plants. The present invention includes a blending and burning frame arranged at the top of the feed port of an impeller coal feeder and a blending structure arranged inside the blending and burning frame. The coal block particle size is made uniform through a guide block, an extrusion plate, a screen and a transmission mechanism, so as to avoid large coal blocks from affecting combustion, thereby improving combustion efficiency and stability. The transmission component driven by a bidirectional motor drives the pulling plate to reciprocate, optimizes the distribution of coal materials, avoids accumulation, and improves the uniformity of blending. During the mixing process, the planetary gear set drives the mixing rod to move in a compound manner, fully mixes the coal materials, overcomes the limitations of traditional mixing, and provides homogeneous fuel for combustion. The bidirectional motor is used to control the intermittent opening and closing of the receiving plate discharge pipe, control the feed amount, ensure feed uniformity, and improve the blending uniformity of the two coal materials and the utilization efficiency of coal.

Description

Technical Field

[0001] The invention relates to the technical field of coal combustion in thermal power plants, in particular to a coal blending combustion device in thermal power plants. Background Art

[0002] As an important energy production unit, the coal blending technology of thermal power plants is crucial for efficient coal utilization, cost control and environmental protection. With the diversification of coal market supply, thermal power plants are faced with the demand for blending coal of different origins and qualities. Traditional coal blending devices have exposed many problems in actual applications and urgently need to be improved.

[0003] The existing coal-fired blending device of a thermal power plant is connected to the feed port of an impeller coal feeder and is fixedly installed at the upper end of the feed port of the impeller coal feeder. The coal from the coal field and the unloading ditch coal are poured into the blending frame for mixing and blending, and then fall into the impeller coal feeder and drive the impeller to rotate to send the coal to the conveyor for feeding and combustion. In the coal block processing link, the uniform particle size of the coal blocks cannot be ensured, which makes it difficult for large coal blocks to fully react during combustion, reduces the combustion efficiency, increases heat loss, and easily causes unstable boiler operation, such as flame jumping, temperature fluctuations and other problems, affecting the stability and economy of power generation. Simple stirring or static mixing is mostly used, and it is difficult to achieve full and uniform mixing of different types of coal, which leads to unstable coal quality entering the combustion stage, inconsistent combustion speed, local overheating or overcooling, and reduces the thermal efficiency of the boiler. The existing coal feeder may be blocked or overloaded due to excessive feeding, and the power generation demand cannot be met if the feeding is too little, which seriously interferes with the coordinated operation of the entire coal-fired blending system, reduces the production efficiency and reliability of the thermal power plant, and cannot meet the modern high-efficiency, low-consumption, and environmentally friendly power generation requirements.

[0004] In view of the above problems, an innovative design was carried out based on the original coal-fired blending device of the thermal power plant. Summary of the invention

[0005] The purpose of the present invention is to provide a coal blending device for a thermal power plant. The device is used to work, thereby solving the problem of low uniformity of mixed blending in the existing coal blending device for a thermal power plant.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal blending device for a thermal power plant, comprising a blending frame arranged at the top of a feed port of an impeller coal feeder and a blending structure arranged inside the blending frame, a material guide block is rotatably connected inside the blending frame, a bidirectional motor is arranged inside the blending frame, an intermittent drive structure is arranged at one end of the bidirectional motor, a crushing structure is arranged at one side of the intermittent drive structure, a screen is arranged inside the blending frame, the screen is located below the crushing structure, an intermittent linkage structure is arranged at the other end of the bidirectional motor, and a material gathering structure is arranged outside the intermittent linkage structure;

[0007] The intermittent drive structure includes a driven rod rotatably connected to one end of a bidirectional motor;

[0008] The crushing structure includes a rotating plate arranged at one end of the driven rod, one side of the rotating plate is slidably connected with a moving plate, and one side of the moving plate is provided with an extrusion plate, which is used to crush the coal blocks;

[0009] The intermittent linkage structure includes a sleeve rod intermittently rotating and connected to the other end of the bidirectional motor;

[0010] The material gathering structure includes a spring arranged on the inner wall of the mixing and burning frame, and a gathering plate is arranged at one end of the spring away from the mixing and burning frame, and the gathering plate reciprocates inside the mixing and burning frame;

[0011] The mixing structure includes a cross plate rotatably connected to the outside of the other end of the bidirectional motor. The mixing structure also includes a sun gear arranged on the outside of the other end of the bidirectional motor. One side of the cross plate is rotatably connected to a planetary gear through an axis, the planetary gear is meshed with the sun gear, and one side of the planetary gear is rotatably connected to a mixing rod.

[0012] Furthermore, a fixed shell is fixedly installed on the inner wall of the blending frame, the bidirectional motor is fixedly installed inside the fixed shell, and both ends of the bidirectional motor extend to the outside of the fixed shell.

[0013] Furthermore, the intermittent drive structure also includes a bevel gear 1 arranged at one end of the bidirectional motor, and the bevel gear 1 is a half gear structure. A side plate is provided on one side of the fixed shell, and a bevel gear 2 is rotatably connected to one side of the side plate. Bevel gear 1 is meshingly connected to bevel gear 2. Bevel gear 3 is provided on the outer side of the driven rod, and bevel gear 3 is meshingly connected to bevel gear 2. A fixing frame is provided on one side of bevel gear 1, bevel gear 2 and bevel gear 3, and the fixing frame is rotatably connected to the driven rod and one end of the bidirectional motor.

[0014] Furthermore, the rotating plate is in a cross shape, and a sliding groove is provided on the surface of the rotating plate. There are four groups of sliding grooves at equal intervals. Slide blocks are slidably connected to the inside of the four groups of sliding grooves, and the four groups of slide blocks are respectively connected to the movable plate. One end of the bidirectional motor is rotatably connected to a connecting plate, and a frame block is provided on the top of the connecting plate. The movable plate is slidably connected to the frame block.

[0015] Furthermore, the extrusion plate is composed of a middle plate and a lower plate, a nail head is provided on one side of the upper plate, and the middle plate and the lower plate are inclined.

[0016] Furthermore, the intermittent linkage structure includes a bevel gear four arranged at the other end of the bidirectional motor, and the bevel gear four is a half gear structure. A vertical plate is arranged on one side of the fixed shell, and a bevel gear five is rotatably connected to one side of the vertical plate. Bevel gear four is meshingly connected with bevel gear five, and a bevel gear six is ​​arranged on the outer side of the sleeve rod, and bevel gear six is ​​meshingly connected with bevel gear five.

[0017] Furthermore, a connecting frame is provided on one side of the bevel gear four, bevel gear five and bevel gear six, and the connecting frame is rotationally connected to the sleeve rod and the other end of the bidirectional motor.

[0018] Furthermore, the material gathering structure includes a shell body rotatably connected to the outside of the sleeve rod, and rack 1 and rack 2 are slidably connected inside the shell. A slot is opened on the surface of the shell, and rack 1 and rack 2 are slidably connected to the slot. A main gear is arranged on the outside of the sleeve rod, and two groups of main gears are distributed up and down. Rack 1 and rack 2 move in opposite directions. Rack 1 and rack 2 are respectively arranged in two groups, and one group of rack 1 and rack 2 is meshed and connected with one group of main gears. Rack 1 and rack 2 are connected to a gathering plate, and a guide plate is arranged on the top of the gathering plate, and the guide plate is inclined.

[0019] Furthermore, there are four groups of planetary gears distributed at equal intervals, one side of the four groups of planetary gears is respectively provided with a rotating shaft, the rotating shaft is connected to the mixing rod, and the other end of the bidirectional motor is provided with a bottom plate, which is rotatably connected to the bottom end of the mixing rod.

[0020] Furthermore, a quantitative discharging structure is provided inside the blending frame, and the quantitative discharging structure includes a receiving plate arranged inside the blending frame, the receiving plate is located below the mixing rod, and the surface of the receiving plate is symmetrically connected with discharging pipe one and discharging pipe two, and the other end of the bidirectional motor is provided with a fan-shaped plate, which is used to intermittently block discharging pipe one and discharging pipe two.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention proposes a coal blending device for a thermal power plant. The existing coal blending device for a thermal power plant has the problem of low mixing and blending uniformity. The present invention makes the coal block particle size uniform through the guide block, the extrusion plate, the screen and the transmission mechanism, avoids the influence of large coal blocks on combustion, improves the combustion efficiency and stability, drives the pulling plate to reciprocate through the transmission component driven by the bidirectional motor, optimizes the distribution of coal, avoids accumulation, and improves the blending uniformity. During the mixing process, the unique sun gear and planetary gear meshing make the mixing rod move in a compound manner to fully mix the coal, overcome the limitations of traditional stirring, provide homogeneous fuel for combustion, and enhance the reliability of boiler operation. With the help of the bidirectional motor, the intermittent opening and closing of the receiving plate discharge pipe is controlled to control the feed amount, ensure the feed uniformity, make the whole system operate in a coordinated manner, improve the coal utilization efficiency and production stability, and have great significance for the efficient, stable and environmentally friendly production of thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall three-dimensional cross-sectional structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall three-dimensional unfolded structure of the present invention;

[0026] Figure 4 It is a three-dimensional structural schematic diagram of the bidirectional motor, the fixed housing and the intermittent drive structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the crushing structure of the present invention;

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the bidirectional motor, the fixed housing and the intermittent linkage structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the material gathering structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the mixed structure of the present invention;

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the quantitative discharging structure of the present invention.

[0032] In the figure: 1. mixing frame; 2. guide block; 3. bidirectional motor; 4. intermittent drive structure; 41. bevel gear one; 42. bevel gear two; 43. bevel gear three; 44. fixed frame; 45. driven rod; 46. side plate; 5. crushing structure; 51. rotating plate; 52. slideway; 53. slide block; 54. moving plate; 55. frame block; 56. connecting plate; 57. extrusion plate; 571. upper plate; 572. middle plate; 573. lower plate; 574. nail head; 6. intermittent linkage structure; 61. bevel gear four; 62. bevel gear five; 63. Bevel gear six; 64. Connecting frame; 65. Vertical plate; 66. Sleeve rod; 7. Material gathering structure; 71. Shell; 72. Main gear; 73. Rack one; 74. Rack two; 75. Pulling plate; 76. Spring; 77. Notch; 8. Mixing structure; 81. Cross plate; 82. Sun gear; 83. Planetary gear; 84. Rotating shaft; 85. Mixing rod; 86. Bottom plate; 9. Quantitative discharging structure; 91. Receiver plate; 92. Discharging pipe one; 93. Discharging pipe two; 94. Fan plate; 10. Screen; 11. Fixed shell. DETAILED DESCRIPTION

[0033] 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.

[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0035] Combination Figure 1-Figure 9 A coal blending device for a thermal power plant comprises a blending frame 1 arranged at the top of a feed port of an impeller coal feeder and a mixing structure 8 arranged inside the blending frame 1, wherein a material guide block 2 is rotatably connected inside the blending frame 1, a bidirectional motor 3 is arranged inside the blending frame 1, an intermittent drive structure 4 is arranged at one end of the bidirectional motor 3, a crushing structure 5 is arranged on one side of the intermittent drive structure 4, a screen 10 is arranged inside the blending frame 1, and the screen 10 is located below the crushing structure 5, an intermittent linkage structure 6 is arranged at the other end of the bidirectional motor 3, and a material gathering structure 7 is arranged on the outside of the intermittent linkage structure 6.

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] See also Figure 1-9 The intermittent drive structure 4 includes a driven rod 45 rotatably connected to one end of the bidirectional motor 3. The intermittent drive structure 4 also includes a bevel gear 41 arranged at one end of the bidirectional motor 3. The bevel gear 41 is a half gear structure. A side plate 46 is provided on one side of the fixed shell 11. A bevel gear 2 42 is rotatably connected to one side of the side plate 46. The bevel gear 1 41 is meshed with the bevel gear 2 42. A bevel gear 3 43 is provided on the outer side of the driven rod 45. The bevel gear 3 43 is meshed with the bevel gear 2 42. A fixing frame 44 is provided on one side of the bevel gear 1 41, the bevel gear 2 42 and the bevel gear 3 43. The fixing frame 44 is rotatably connected to the driven rod 45 and one end of the bidirectional motor 3 for easy driving.

[0038] The crushing structure 5 includes a rotating plate 51 arranged at one end of the driven rod 45, and a moving plate 54 is slidably connected to one side of the rotating plate 51, and an extrusion plate 57 is arranged on one side of the moving plate 54. The extrusion plate 57 is used to crush the coal blocks. The rotating plate 51 is in a cross shape, and a slide groove 52 is provided on the surface of the rotating plate 51. Four groups of slide grooves 52 are provided at equal intervals. Slide blocks 53 are slidably connected to the inside of the four groups of slide grooves 52, respectively, and the four groups of slide blocks 53 are respectively connected to the moving plate 54. A connecting plate 56 is rotatably connected to one end of the bidirectional motor 3, and a frame block 55 is arranged on the top of the connecting plate 56. The moving plate 54 is slidably connected to the frame block 55. The extrusion plate 57 consists of an upper plate 571, a middle plate 572 and a lower plate 573. A nail head 574 is arranged on one side of the upper plate 571, and the middle plate 572 and the lower plate 573 are inclined to ensure that coal blocks at all locations can be processed, so that the coal is more evenly distributed in the blending frame 1, laying a foundation for subsequent uniform blending.

[0039] The intermittent linkage structure 6 includes a sleeve rod 66 intermittently rotatably connected to the other end of the bidirectional motor 3. The intermittent linkage structure 6 includes a bevel gear four 61 arranged at the other end of the bidirectional motor 3. The bevel gear four 61 is a semi-gear structure. A vertical plate 65 is arranged on one side of the fixed shell 11. A bevel gear five 62 is rotatably connected to one side of the vertical plate 65. The bevel gear four 61 is meshed with the bevel gear five 62. A bevel gear six 63 is arranged on the outer side of the sleeve rod 66. The bevel gear six 63 is meshed with the bevel gear five 62. A connecting frame 64 is arranged on one side of the bevel gear four 61, the bevel gear five 62 and the bevel gear six 63. The connecting frame 64 is rotatably connected to the sleeve rod 66 and the other end of the bidirectional motor 3 for convenient driving.

[0040] The material gathering structure 7 includes a spring 76 arranged on the inner wall of the blending frame 1, and a drawing plate 75 is arranged at one end of the spring 76 away from the blending frame 1. The drawing plate 75 reciprocates inside the blending frame 1. The material gathering structure 7 includes a shell 71 rotatably connected to the outside of the sleeve rod 66, and a rack 1 73 and a rack 2 74 are slidably connected inside the shell 71. A notch 77 is opened on the surface of the shell 71, and the rack 1 73 and the rack 2 74 are slidably connected to the notch 77. A main gear 72 is arranged on the outside of the sleeve rod 66. The main gear 72 There are two groups distributed up and down, rack one 73 and rack two 74 move in opposite directions, rack one 73 and rack two 74 are respectively provided with two groups, one group of rack one 73 and rack two 74 are meshed and connected with a group of main gears 72, rack one 73 and rack two 74 are connected with the pulling plate 75, and a guide plate is provided on the top of the pulling plate 75. The guide plate is inclined to avoid uneven mixing and burning of coal on the four sides of the mixing and burning frame 1, and can effectively avoid the accumulation of coal on the four sides of the mixing and burning frame 1, ensuring that the coal is concentrated in the area with better mixing effect.

[0041] The mixing structure 8 includes a cross plate 81 rotatably connected to the outside of the other end of the bidirectional motor 3. The mixing structure 8 also includes a sun gear 82 arranged on the outside of the other end of the bidirectional motor 3. One side of the cross plate 81 is rotatably connected to a planetary gear 83 through an axis. The planetary gear 83 is meshed with the sun gear 82. One side of the planetary gear 83 is rotatably connected to a mixing rod 85. There are four groups of planetary gears 83 distributed at equal intervals. One side of the four groups of planetary gears 83 is respectively provided with a rotating shaft 84, which is connected to the mixing rod 85. The other end of the bidirectional motor 3 is provided with a bottom plate 86, which is rotatably connected to the bottom end of the mixing rod 85, so that the two groups of coal materials are mixed and burned evenly, so that the two types of coal materials are fully contacted and mixed, overcoming the limitations of traditional single-direction stirring and greatly improving the mixing efficiency and uniformity.

[0042] A fixed shell 11 is fixedly installed on the inner wall of the blending frame 1, and the bidirectional motor 3 is fixedly installed inside the fixed shell 11. Both ends of the bidirectional motor 3 extend to the outside of the fixed shell 11 for easy fixation.

[0043] A quantitative discharging structure 9 is provided inside the blending frame 1, and the quantitative discharging structure 9 includes a receiving plate 91 arranged inside the blending frame 1, and the receiving plate 91 is located below the mixing rod 85. The surface of the receiving plate 91 is symmetrically connected with a discharging pipe 1 92 and a discharging pipe 2 93. A fan-shaped plate 94 is provided at the other end of the bidirectional motor 3, and the fan-shaped plate 94 is used to intermittently block the discharging pipe 1 92 and the discharging pipe 2 93 to avoid excessive or insufficient feeding affecting the operating stability of the coal feeder.

[0044] For details, please refer to Figure 4-Figure 5 When in use, the coal from the coal yard and the coal from the coal unloading ditch need to be blended through this device, and then the blended coal is fed through the impeller coal feeder and the conveyor for combustion, and the two kinds of coal are poured into the interior of the blending frame 1. Since the top of the rotating plate 51 inside the blending frame 1 is rotatably connected with the guide block 2, the guide block 2 is in the shape of a quadrangular pyramid, so that the coal blocks fall from the four sides of the guide block 2 to the gap between the extrusion plate 57 and the inner wall of the blending frame 1, and a screen 10 is arranged below the extrusion plate 57, and the large pieces of coal are isolated at the upper end by the screen 10, and the bottom end of the extrusion plate 57 is in contact with the top surface of the screen 10. As the bidirectional electric drive When the machine 3 is started, the bidirectional motor 3 is fixedly installed inside the fixed shell 11, and the fixed shell 11 is fixedly connected to the inner wall of the blending frame 1, so that one end of the bidirectional motor 3 drives the bevel gear 1 41 to mesh with the bevel gear 2 42, and the bevel gear 1 41 is a half gear structure, so that the bevel gear 2 42 is meshed with the bevel gear 3 43, and the bevel gear 3 43 drives the driven rod 45 on one side to rotate intermittently, and the driven rod 45 is rotatably connected with one end of the bidirectional motor 3, and one side of the bevel gear 1 41, the bevel gear 2 42 and the bevel gear 3 43 is provided with a fixed frame 44, and the fixed frame 44 is connected with the driven rod 45 and the bidirectional motor 3 One end is connected by rotation, and the driven rod 45 drives the cross-shaped rotating plate 51 to rotate. A spring is arranged between the driven rod 45 and the rotating plate 51, so that the bevel gear 1 41 and the bevel gear 2 42 are not meshed and return to their original positions. The rotating plate 51 drives the sliding groove 52 on the surface to rotate, so that the corresponding slider 53 inside the sliding groove 52 drives the moving plate 54 on one side to slide outward in the frame block 55. The frame block 55 is fixedly connected to the inner wall of the blending frame 1 through the connecting plate 56 at its bottom end. The moving plate 54 drives the extruding plate 57 to move outward to extrude and crush the coal blocks, and a plurality of groups of nail heads 574 arranged on one side of the upper plate 571 extrude and crush the coal blocks, and The inclined middle plate 572 and the lower plate 573 squeeze and crush the large coal blocks isolated by the screen 10. In this process, since a spring is provided between the rotating plate 51 and the driven rod 45, the rotating plate 51 can be easily returned to its original position when the bevel gear is not engaged, thereby ensuring the continuity and reliability of the structural movement, preventing the coal blocks from being locally accumulated in the blending frame 1, ensuring that the coal blocks in various places can be processed, making the coal more evenly distributed in the blending frame 1, laying the foundation for subsequent uniform blending, making the coal blocks more uniform in particle size, facilitating subsequent blending and combustion, avoiding problems such as incomplete combustion and uneven heat transfer caused by excessively large coal blocks, and improving combustion efficiency and stability;

[0045] See also Figure 6-Figure 7 As the bidirectional motor 3 drives, the bevel gear 4 61 at the other end is meshed and connected with the bevel gear 5 62, the bevel gear 5 62 is meshed and connected with the bevel gear 6 63, the bevel gear 4 61 is rotatably connected with the vertical plate 65, the vertical plate 65 is connected with the fixed shell 11, the bevel gear 63 drives the sleeve rod 66 to rotate, the sleeve rod 66 is rotatably connected with the other end of the bidirectional motor 3, so that the sleeve rod 66 drives the main gear 72 to mesh with the rack 1 73 and the rack 2 74, the rack 1 73 and the rack 2 74 are slidably connected with the shell 71, and the other surface of the shell 71 is provided with a notch 77, the notch 77 is meshed and connected with the rack 1 73 and the rack 2 74, the rack 1 73 and the rack 2 74 move in opposite directions, the main gear 72 is provided with two groups from top to bottom, the rack 1 73 and the rack 2 74 are also provided with two groups respectively, and the two groups of rack 1 73 The rack 1 73 and the rack 2 74 are in a cross shape, and the rack 1 73 and the rack 2 74 respectively drive the corresponding pulling plate 75 to move toward the middle, so as to push the coal dropped from the screen 10 of the blending frame 1 to the middle, and a guide plate is provided at the top of the pulling plate 75, and the guide plate is inclined. The guide plate is used to block the distance between the pulling plate 75 and the inner wall of the blending frame 1, so as to guide the coal to fall to the side close to the mixing rod 85, and when the bevel gear 4 61 is not engaged with the bevel gear 5 62, the pulling plate 75 is returned to its position through the spring 76, and further reciprocating motion is achieved, so as to avoid uneven mixing and burning of the coal on the four sides of the blending frame 1, and effectively avoid the accumulation of coal on the four sides of the blending frame 1, so as to ensure that the coal is concentrated in the area with better mixing effect, so that the coal is distributed more reasonably before entering the mixing stage, and the blending uniformity is further improved;

[0046] See also Figure 8 As the bidirectional motor 3 drives the sun gear 82 at the other end to mesh with the four sets of planetary gears 83, the planetary gear 83 drives the mixing rod 85 on one side to rotate through the rotating shaft 84. The rotating shaft 84 is rotatably connected to the cross plate 81. The cross plate 81 is connected to the other end of the bidirectional motor 3, and the other end of the mixing rod 85 is rotatably connected with a bottom plate 86, which is connected to the other end of the bidirectional motor 3. As a result, the four sets of mixing rods 85 rotate around the sun gear 82 while rotating on their own, so that the two groups of coal materials are mixed and burned evenly, so that the two types of coal materials are fully contacted and mixed, overcoming the limitations of traditional single-direction stirring, greatly improving the mixing efficiency and uniformity, ensuring that the characteristics of different types of coal are evenly distributed, providing homogeneous fuel for subsequent combustion, helping to stabilize the combustion conditions, reduce combustion problems caused by coal quality fluctuations, and improve boiler operation reliability;

[0047] See also Fig. 9The mixed material falls onto the receiving plate 91. Since two groups of discharge pipes 1 92 and discharge pipes 2 93 are symmetrically provided on the surface of the receiving plate 91, as the bidirectional motor 3 drives the fan-shaped plate 94 at the other end to rotate, the fan-shaped plate 94 intermittently opens and closes the discharge pipes 1 92 and the discharge pipes 2 93, thereby completing intermittent feeding into the impeller coal feeder, avoiding excessive or insufficient feeding that affects the operating stability of the coal feeder and the combustion process, ensuring that the coal entering the impeller coal feeder is fully and evenly blended, which helps to maintain a stable and efficient combustion process, making the entire coal blending system run more coordinated and accurate, and improving the coal utilization efficiency and production stability of thermal power plants.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal blending device for a thermal power plant, comprising a blending frame (1) arranged at the top of a feed port of an impeller coal feeder and a blending structure (8) arranged inside the blending frame (1), characterized in that: The mixing and burning frame (1) is rotatably connected with a material guide block (2) inside, a bidirectional motor (3) is arranged inside the mixing and burning frame (1), an intermittent drive structure (4) is arranged at one end of the bidirectional motor (3), a crushing structure (5) is arranged on one side of the intermittent drive structure (4), a screen (10) is arranged inside the mixing and burning frame (1), the screen (10) is located below the crushing structure (5), an intermittent linkage structure (6) is arranged at the other end of the bidirectional motor (3), and a material gathering structure (7) is arranged on the outer side of the intermittent linkage structure (6); The intermittent drive structure (4) includes a driven rod (45) rotatably connected to one end of the bidirectional motor (3); The crushing structure (5) comprises a rotating plate (51) arranged at one end of the driven rod (45), one side of the rotating plate (51) is slidably connected to a moving plate (54), one side of the moving plate (54) is provided with an extrusion plate (57), and the extrusion plate (57) is used to crush the coal blocks; The intermittent linkage structure (6) includes a sleeve rod (66) rotatably connected to the other end of the bidirectional motor (3); The material gathering structure (7) comprises a spring (76) arranged on the inner wall of the blending and firing frame (1), and a gathering plate (75) is arranged at one end of the spring (76) away from the blending and firing frame (1), and the gathering plate (75) reciprocates inside the blending and firing frame (1); The mixing structure (8) comprises a cross plate (81) rotatably connected to the outside of the other end of the bidirectional motor (3), and the mixing structure (8) further comprises a sun gear (82) arranged on the outside of the other end of the bidirectional motor (3). One side of the cross plate (81) is rotatably connected to a planetary gear (83) via an axis, the planetary gear (83) is meshingly connected to the sun gear (82), and one side of the planetary gear (83) is rotatably connected to a mixing rod (85).

2. A coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: A fixed shell (11) is fixedly mounted on the inner wall of the blending frame (1), and a bidirectional motor (3) is fixedly mounted inside the fixed shell (11), with both ends of the bidirectional motor (3) extending to the outside of the fixed shell (11).

3. A coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: The intermittent drive structure (4) further comprises a bevel gear 1 (41) arranged at one end of the bidirectional motor (3), the bevel gear 1 (41) being a half gear structure, a side plate (46) being arranged at one side of the fixed housing (11), a side of the side plate (46) being rotatably connected to a bevel gear 2 (42), the bevel gear 1 (41) being meshingly connected to the bevel gear 2 (42), a bevel gear 3 (43) being arranged at the outer side of the driven rod (45), the bevel gear 3 (43) being meshingly connected to the bevel gear 2 (42), a fixing frame (44) being arranged at one side of the bevel gear 1 (41), the bevel gear 2 (42) and the bevel gear 3 (43), the fixing frame (44) being rotatably connected to the driven rod (45) and one end of the bidirectional motor (3).

4. A coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: The rotating plate (51) is in a cross shape, and a sliding groove (52) is provided on the surface of the rotating plate (51), and four groups of sliding grooves (52) are provided at equal intervals, and sliders (53) are slidably connected inside the four groups of sliding grooves (52), and the four groups of sliders (53) are respectively connected to the moving plate (54), and one end of the bidirectional motor (3) is rotatably connected to a connecting plate (56), and a frame block (55) is provided at the top of the connecting plate (56), and the moving plate (54) is slidably connected to the frame block (55).

5. The coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: The extrusion plate (57) is composed of an upper plate (571), a middle plate (572) and a lower plate (573), a nail head (574) is arranged on one side of the upper plate (571), and the middle plate (572) and the lower plate (573) are inclined.

6. The coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: The intermittent linkage structure (6) comprises a bevel gear four (61) arranged at the other end of the bidirectional motor (3), the bevel gear four (61) being a half gear structure, a vertical plate (65) being arranged on one side of the fixed housing (11), a bevel gear five (62) being rotatably connected to one side of the vertical plate (65), the bevel gear four (61) being meshingly connected with the bevel gear five (62), and a bevel gear six (63) being arranged on the outer side of the sleeve rod (66), the bevel gear six (63) being meshingly connected with the bevel gear five (62).

7. A coal-fired mixed combustion device for a thermal power plant according to claim 6, characterized in that: A connecting frame (64) is provided on one side of the bevel gear four (61), the bevel gear five (62) and the bevel gear six (63), and the connecting frame (64) is rotatably connected to the sleeve rod (66) and the other end of the bidirectional motor (3).

8. The coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: The material gathering structure (7) comprises a shell (71) rotatably connected to the outside of the sleeve rod (66), a rack 1 (73) and a rack 2 (74) are slidably connected inside the shell (71), a notch (77) is provided on the surface of the shell (71), and the rack 1 (73) and the rack 2 (74) are slidably connected to the notch (77), a main gear (72) is arranged on the outside of the sleeve rod (66), and the main gear (72) is divided into two groups, the rack 1 (73) and the rack 2 (74) move in opposite directions, and the rack 1 (73) and the rack 2 (74) are respectively arranged in two groups, one group of the rack 1 (73) and the rack 2 (74) are meshed and connected with one group of the main gear (72), the rack 1 (73) and the rack 2 (74) are connected to a gathering plate (75), and a guide plate is arranged at the top of the gathering plate (75), and the guide plate is inclined.

9. The coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: The planetary gears (83) are arranged in four groups at equal intervals. A rotating shaft (84) is provided on one side of each of the four groups of planetary gears (83). The rotating shaft (84) is connected to a mixing rod (85). A bottom plate (86) is provided at the other end of the bidirectional motor (3). The bottom plate (86) is rotatably connected to the bottom end of the mixing rod (85).

10. The coal-fired mixed combustion device for a thermal power plant according to claim 1, characterized in that: A quantitative discharging structure (9) is arranged inside the blending frame (1), and the quantitative discharging structure (9) includes a receiving plate (91) arranged inside the blending frame (1), the receiving plate (91) is located below the mixing rod (85), and a discharging pipe 1 (92) and a discharging pipe 2 (93) are symmetrically connected on the surface of the receiving plate (91), and a fan-shaped plate (94) is arranged at the other end of the bidirectional motor (3), and the fan-shaped plate (94) is used to intermittently block the discharging pipe 1 (92) and the discharging pipe 2 (93).

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