Coal scuttle of power plant

Abstract

The invention discloses a coal bucket of a power plant, and aims to solve the problems that a traditional coal bucket is easy to block coal, non-uniform in blanking, difficult to accurately control flow and the like. The coal bucket body is in an inverted rectangular pyramid shape, and an auxiliary coal falling plate is arranged on the inner wall, hinged to the inner wall through a shaft rod and connected with a linkage assembly. The linkage assembly comprises a main gear, an auxiliary gear and the like, and the auxiliary coal falling plate can vibrate regularly through a series of transmission. The bottom of the coal bucket is provided with a telescopic material port and a linkage telescopic assembly which can control the coal bucket to move up and down. The spiral conveying piece on the rotating shaft assists coal to flow to the material opening, and the motor drives the rotating shaft to rotate through the speed reducer to drive the whole linkage system to operate. The anti-blocking device can effectively prevent blocking, uniform discharging and accurate flow control are achieved, and the coal conveying efficiency and reliability of a power plant are improved.

Description

Technical Field

[0001] The invention relates to the technical field of power generation equipment, in particular to a coal hopper of a power plant. Background Art

[0002] In the entire production and operation system of a modern power plant, the coal transportation link is like a key link in the chain, and the coal hopper is an indispensable core equipment in this link. Coal is transferred from the initial storage area to the coal hopper for temporary storage, and then it is accurately and continuously transported to various downstream processing equipment, such as belt conveyors, coal mills, etc., by the coal hopper, so as to ensure that the coal can smoothly participate in the power generation process according to the established process flow. It can be said that the performance of the coal hopper and the stability of its operation are directly related to the continuity of the coal supply of the entire power plant and the efficiency of power generation operations. Its importance is self-evident.

[0003] However, in the long-term practical application of traditional power plant coal hoppers, a series of technical problems that need to be solved have been exposed. On the one hand, the coal falling process in the coal hopper is often difficult to proceed in an ideal state. Since coal itself has different particle size distributions, small particles and larger lumps of coal are mixed together, coupled with the humidity difference of the coal itself and the sticky characteristics of some coal, the coal is very easy to adhere to the inner wall of the coal hopper. As time goes by and the coal continues to accumulate, this adhesion will become more and more serious, and then the coal will form an arch and blockage at the bottom, corners and some areas of the inner wall of the coal hopper. Once a blockage occurs, not only will the coal feeding process come to an abrupt halt, resulting in the inability of downstream equipment to obtain sufficient coal supply in time, affecting the normal production rhythm of the entire power plant, but also it will take a lot of manpower, material resources and precious time to clear these blocked coal, greatly increasing the operating cost and maintenance workload of the power plant.

[0004] On the other hand, traditional coal hoppers lack effective means to regulate the uniformity of coal feeding. Coal falls naturally only by its own gravity, which makes it difficult to keep the coal flow rate at different positions consistent during the falling process. For example, the coal near the discharge port of the coal hopper may fall quickly due to gravity, while the coal far away from the discharge port or in other corners of the coal hopper falls slowly. In this way, the subsequent conveying equipment will face uneven force. Excessive coal pressure in local areas will accelerate the wear rate of equipment and shorten the service life of equipment. It is also easy to cause equipment failure, which seriously affects the stability of the coal conveying system and the overall conveying efficiency. In addition, for different production conditions and the diverse needs of different downstream processing equipment for coal flow, it is difficult for traditional coal hoppers to achieve accurate flow control, and it is impossible to flexibly adjust the coal feeding speed and flow according to actual conditions, so that downstream equipment is often unable to be in the best working state, which undoubtedly has a negative impact on the energy utilization efficiency and power generation efficiency of power plants.

[0005] In view of the above-mentioned technical problems of coal hoppers in traditional power plants, with the continuous expansion of the scale of modern power plants and the increasing requirements for power generation efficiency, energy utilization, equipment reliability, etc., the industry urgently needs a new coal hopper structure to break the current dilemma. This new type of coal hopper should be able to fundamentally solve the problem of coal blockage, actively intervene in the falling process of coal in the coal hopper through an effective mechanical structure, prevent coal from piling up and blocking at any position, and ensure that coal can fall smoothly and unimpeded to downstream equipment. At the same time, it also needs to have the ability to accurately control the uniformity of coal feeding, so that coal can flow to the discharge port at a relatively uniform speed and flow rate from all positions of the coal hopper, ensure that subsequent equipment is evenly fed, and reduce various problems caused by uneven force. More importantly, it is necessary to accurately and flexibly adjust the coal feeding flow rate according to different production scenarios and the specific needs of downstream equipment, so that downstream equipment is always in the best operating conditions, thereby comprehensively improving the efficiency and stability of the coal transportation link of the entire power plant, and better meeting the trend requirements of efficient, stable and sustainable development of modern power plants.

[0006] To sum up, the research and development of a power plant coal hopper with an innovative structure that can effectively solve the above-mentioned technical problems has become an urgent need for the current development of the industry, and is also an important direction for promoting technological progress in power plants and improving their comprehensive benefits. Summary of the invention

[0007] In the coal transportation link of power plants, traditional coal hoppers often have problems such as easy coal accumulation and blockage, uneven material discharge, and difficult to accurately control the flow rate. The present invention aims to provide a power plant coal hopper with a novel structure and good mechanical linkage function. Through ingenious structural design, it effectively solves the problem of coal accumulation and blockage in the coal hopper, realizes uniform and stable coal discharge, and can accurately control the discharge flow rate, thereby improving the efficiency and reliability of coal transportation in power plants.

[0008] Technical Solution

[0009] The power plant coal hopper of the present invention is mainly composed of a coal hopper body, an auxiliary coal dropping plate, a linkage component and a linkage telescopic component.

[0010] The main body of the coal hopper is in the shape of an inverted quadrangular pyramid and is hollow inside. Auxiliary coal dropping plates are arranged on the inner walls of the four sides. The upper end of the auxiliary coal dropping plate is hinged to the first hinge frame fixed to the inner wall of the coal hopper through an axle rod, so that the auxiliary coal dropping plate can swing around the axle rod. A second hinge frame is arranged on the side of the auxiliary coal dropping plate close to the center of the coal hopper, and a pull rod is hinged on the top of the second hinge frame.

[0011] The linkage assembly is located at the top of the coal hopper and is supported and installed by the mounting plate. The mounting plate is tilted and supported by the diagonal brackets at the four corners of the top of the coal hopper. A rotating shaft is inserted and rotated in the center of the mounting plate. The outer peripheral surface of the rotating shaft is sleeved with a main gear. Four sub-gears are meshed on the outer edge of the main gear. The sub-gears are all rotatably installed at the bottom of the mounting plate. A yoke shaft is provided at the eccentric position at the bottom of the sub-gear. The sliding sleeve at the lower part of the yoke shaft is provided with a notch frame. The yoke shaft slides inside the notch opened by the notch frame. At the same time, the slides set at both ends of the yoke shaft slide along the slide rod fixed at the bottom of the mounting plate, thereby limiting the movement trajectory of the yoke shaft and ensuring the stability of the transmission. A third articulated frame is fixed at the bottom of the notch frame. The third articulated frame is hinged to the top of the adjacent pull rod. When the rotating shaft rotates, the pull rod is driven to move through the linkage of the main gear, the sub-gear and other related components, so that the auxiliary coal falling plate vibrates regularly, stirs the coal on the inner wall of the coal hopper, avoids its accumulation and blockage, and promotes the smooth fall of coal.

[0012] A telescopic material port is slidably inserted at the bottom of the coal hopper, and a linkage telescopic component is provided on the side wall of the telescopic material port to control its up and down movement. The linkage telescopic component includes a connecting plate arranged on the four outer walls of the telescopic material port, a cable is connected to the top of the connecting plate, a second bracket is provided on the four upper walls of the coal hopper, a second guide wheel is hinged on the top, and a first bracket is provided on the four lower walls of the coal hopper, a first guide wheel is hinged at the end, and the cable is wound around the first guide wheel and the outer peripheral surface of the second guide wheel on the adjacent side, and the top is connected to the third hinged frame on the adjacent side. By assisting the vibration of the coal dropping plate, the telescopic material port is driven to move up and down synchronously with the help of cable transmission, so as to realize the dynamic adjustment of the size and position of the discharge port, and further ensure the uniform and stable discharge of coal.

[0013] In addition, a spiral conveyor is sleeved on the outer circumference of the bottom of the shaft. When the shaft rotates, the spiral conveyor can push the coal at the bottom of the coal hopper and help the coal flow to the telescopic material port. A reducer is coaxially arranged on the top of the shaft, and a motor is coaxially arranged on the input end of the reducer. The motor provides power, and after the reducer speed is adjusted, the shaft is driven to rotate, thereby driving the entire linkage system to operate.

[0014] Beneficial Effects

[0015] Effectively prevent coal blockage and accumulation

[0016] By assisting the regular vibration of the coal dropping plate and the dynamic adjustment of the telescopic material port, the coal falling process is intervened in all directions from the inner wall of the coal hopper to the discharge port, breaking the possible accumulation of coal and ensuring that the coal can continue to fall smoothly at all positions in the coal hopper, greatly reducing the occurrence of coal blockage, ensuring the continuity of coal transportation, reducing the risk of production interruption caused by coal blockage, and improving the stability of the overall production operation of the power plant.

[0017] Achieve precise material flow control

[0018] With the help of the motor, reducer and the entire linkage system, the vibration frequency of the auxiliary coal-dropping plate, the movement speed and opening size of the telescopic material opening can be flexibly controlled by adjusting the motor speed, thereby realizing precise adjustment of the coal unloading speed and flow rate. This enables the coal unloading flow rate to be adjusted in real time according to the different production conditions of the power plant and the actual needs of downstream equipment, ensuring that the downstream coal processing equipment can operate stably under the best conditions, improving the service life and production efficiency of the equipment.

[0019] Improve the uniformity of coal feeding

[0020] The synchronous vibration of the auxiliary coal-dropping plate and the up and down movement of the telescopic material port enable the coal at different positions in the coal hopper to flow to the discharge port more evenly, avoiding the situation where the coal is discharged too quickly or too slowly in some areas, ensuring the uniformity of coal transportation to subsequent links, and facilitating the uniform receipt of materials by subsequent equipment, reducing problems such as equipment overloading and wear caused by uneven coal distribution.

[0021] Compact structure and good linkage

[0022] The various functional components of the entire coal hopper are closely connected through a mechanical structure, and an efficient linkage effect is achieved by using gears, hinges, cables, etc., integrating a variety of functions that facilitate coal unloading in a relatively limited space. It does not take up too much space and can work together. It meets the practical and efficient design requirements of industrial equipment, is easy to install and apply in the existing layout of the power plant, and has high practicality and promotion value.

[0023] In summary, the power plant coal hopper of the present invention effectively solves many problems existing in traditional coal hoppers through innovative structural design and good mechanical linkage function, and provides a more reliable and efficient solution for the coal transportation link of power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of a top view (internal structure of a coal hopper) of an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of a linkage telescopic component according to an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the linkage component structure of an embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0030] Figure 6 For the embodiment of the present invention Figure 3 A schematic diagram of the enlarged local structure at A;

[0031] Figure 7 For the embodiment of the present invention Figure 4 A schematic diagram of the enlarged local structure at B;

[0032] Figure 8 For the embodiment of the present invention Figure 5 An enlarged schematic diagram of the local structure at location C.

[0033] The markings in the figure are:

[0034] 1. Coal hopper; 2. Diagonal support frame; 3. Mounting plate; 4. Motor; 5. Reducer; 7. Rotating shaft; 8. Auxiliary coal dropping plate; 9. Shaft; 10. First articulated frame; 11. Second articulated frame; 12. Main gear; 13. Sub gear; 14. Yoke shaft; 15. Notch frame; 151. Notch; 16. Slide; 17. Slide rod; 18. Third articulated frame; 19. Pull rod; 20. Screw conveyor sheet; 21. Telescopic material port; 22. Telescopic rod; 23. Compression spring; 24. Connecting plate; 25. First bracket; 26. First guide wheel; 27. Cable; 28. Second bracket; 29. ​​Second guide wheel. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0036] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0037] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0038] Example 1

[0039] See also Figures 1 to 8

[0040] 1. Parts preparation

[0041] Coal hopper 1 main body

[0042] High-strength steel of appropriate specifications is selected and welded to produce the main structure of the coal hopper 1 in the shape of an inverted quadrangular pyramid with a hollow interior according to the design requirements, ensuring that its internal space can meet the capacity requirements of coal storage and unloading in the power plant, and the inner and outer walls of the coal hopper 1 are polished, rust-removed and other pre-treatment processes to make its surface flat and smooth, providing a good foundation for the installation of subsequent components.

[0043] Auxiliary coal dropping plate 8 and related hinged parts

[0044] Auxiliary coal dropping plates 8 are made on the four inner walls. The auxiliary coal dropping plates 8 are made of steel with good wear resistance and are cut and processed according to the size of the inner wall of the coal hopper 1 so that they can be installed on the inner wall of the coal hopper 1. A shaft rod 9 is inserted at the corresponding position on the upper end of the auxiliary coal dropping plate 8 to ensure that the shaft rod 9 is firmly connected to the auxiliary coal dropping plate 8 and can rotate flexibly. Prepare the first articulated frame 10 and fix it at a suitable position on the inner wall of the coal hopper 1 according to the design requirements, so that the two ends of the shaft rod 9 can be smoothly articulated with the first articulated frame 10, ensuring that the auxiliary coal dropping plate 8 can swing around the shaft rod 9 to a certain extent.

[0045] A second articulated frame 11 is installed on the auxiliary coal dropping plate 8 near the center of the coal hopper 1 , and the stability of the connection must also be ensured to prepare for the subsequent articulation with the pull rod 19 .

[0046] Linkage components

[0047] The main gear 12 and four sub-gears 13 are manufactured, and the gear modulus, number of teeth and other parameters are ensured to meet the design requirements to ensure a good meshing transmission effect. The main gear 12 is sleeved on the outer circumference of the rotating shaft 7, and it is ensured that it can rotate flexibly relative to the rotating shaft 7 without axial displacement. The sub-gear 13 is rotatably mounted at the specified position at the bottom of the mounting plate 3 through suitable bearings, etc., so that it can mesh with the main gear 12 accurately and smoothly.

[0048] For the yoke shaft 14, it is necessary to ensure that it is installed at the eccentric position at the bottom of the secondary gear 13, and the processing accuracy meets the requirements, so that it can slide smoothly in the notch 151 of the notch frame 15. The notch frame 15 is made, and a precise notch 151 is opened at the corresponding position, and the yoke shaft 14 is slidably inserted inside the notch 151. The slide 16 is installed at both ends of the yoke shaft 14, and the slide rod 17 is fixed at the bottom of the mounting plate 3, so that the slide 16 can slide stably along the slide rod 17, limit the movement trajectory of the yoke shaft 14, and ensure the accuracy of the transmission. The third articulated frame 18 is fixed at the bottom of the notch frame 15 for subsequent articulated connection with the pull rod 19.

[0049] Telescopic material port 21 and linkage telescopic assembly

[0050] The telescopic material port 21 is made so that its size matches the bottom opening of the coal hopper 1 and can slide up and down smoothly at the bottom of the coal hopper 1. Connecting plates 24 are installed on the four walls outside the telescopic material port 21 to ensure a firm and reliable connection. A cable 27 made of high-strength galvanized steel wire rope is prepared, and its diameter is controlled within the range of 8-10 mm. A wear-resistant rubber protective sleeve 31 with a thickness of not less than 2 mm is wrapped on the outer surface of the cable 27, and then one end of the cable 27 is firmly connected to the top of the connecting plate 24.

[0051] A second bracket 28 is installed on the four walls of the upper part of the coal hopper 1, and a second guide wheel 29 is hinged on the top thereof to ensure that the second guide wheel 29 can rotate flexibly; a first bracket 25 is installed on the four walls of the lower part of the coal hopper 1, and the first guide wheel 26 is hinged at the end to ensure the flexibility of rotation. The cable 27 is sequentially wound around the outer circumference of the first guide wheel 26 and the second guide wheel 29 on the adjacent side, and the other end is reserved for connection with the third hinge frame 18.

[0052] Vertical telescopic rods 22 are installed at the four corners of the top of the telescopic material port 21 to ensure that the telescopic rod 22 can be accurately slid and inserted into the preset installation hole at the bottom of the coal hopper 1, and a compression spring 23 is sleeved on the outer circumference of the telescopic rod 22. The initial compression amount of the compression spring 23 is adjusted so that it can not only play a supporting and buffering role, but also allow the telescopic material port 21 to move up and down smoothly when subjected to external force.

[0053] Other components

[0054] The spiral conveyor sheet 20 is welded and installed on the outer peripheral surface of the bottom of the rotating shaft 7 according to the design requirements. The pitch of the spiral conveyor sheet 20 is controlled at 20-30 cm, the spacing between adjacent spiral conveyor sheets 20 is maintained at 10-15 cm, and the thickness is 5-8 mm. At the same time, the outer edge of the spiral conveyor sheet 20 is polished to form an arc-shaped guide surface 32 with a curvature radius of 10-15 cm, which facilitates better flow of coal.

[0055] The reducer 5 is coaxially installed on the top of the rotating shaft 7, and it is ensured that the reducer 5 is tightly connected to the rotating shaft 7 and the transmission is precise. Then the motor 4 is coaxially installed on the input end of the top of the reducer 5. The motor 4 is selected with a model of suitable power to meet the power requirement for driving the entire linkage system. At the same time, the motor 4 is fixed on a stable base to prevent it from shaking during operation.

[0056] 2. Installation steps

[0057] Coal hopper 1 installation and positioning

[0058] The manufactured coal hopper 1 is hoisted to the pre-planned installation position in the power plant, and the coal hopper 1 is firmly fixed to the foundation platform by means of anchor bolts, etc. The coal hopper 1 is horizontally calibrated using measuring tools such as a level to ensure that its installation position is accurate and in a horizontal state to avoid affecting the coal unloading situation due to the tilted installation.

[0059] Installation of mounting plate 3 and related linkage components

[0060] Lift the mounting plate 3 with the diagonal support frame 2 to the top of the coal hopper 1, and weld and fix the bottom end of the diagonal support frame 2 to the corresponding positions of the four corners of the top of the coal hopper 1, to ensure that the mounting plate 3 is firmly erected above the coal hopper 1 through the diagonal support frame 2, and the mounting plate 3 is in a horizontal state. Then, according to the requirements described in the previous preparation of the components, the main gear 12, the secondary gear 13, the yoke shaft 14, the notch frame 15, the slide 16, the slide rod 17 and other components of the linkage assembly are accurately installed at the corresponding positions at the bottom of the mounting plate 3 in sequence. During the installation process, the connection between the components and the flexibility of the transmission should be checked while installing to ensure that the entire linkage assembly can operate normally.

[0061] Auxiliary coal dropping plate 8 is connected with linkage assembly

[0062] The auxiliary coal dropping plate 8 with the second hinged frame 11 installed is hingedly installed with the first hinged frame 10 on the inner wall of the coal hopper 1 through the shaft 9, so that the auxiliary coal dropping plate 8 can swing normally on the inner wall of the coal hopper 1. Then, take the pull rod 19, hinge one end of it with the top of the second hinged frame 11 on the auxiliary coal dropping plate 8, and hinge the other end with the third hinged frame 18 at the bottom of the notch frame 15 in the linkage assembly, so as to complete the connection between the auxiliary coal dropping plate 8 and the linkage assembly, and ensure that the auxiliary coal dropping plate 8 can be driven to vibrate regularly through the action of the linkage assembly.

[0063] Installation of telescopic material port 21 and linkage telescopic components

[0064] Insert the telescopic material port 21 with the telescopic rod 22 and the compression spring 23 upward from the bottom opening of the coal hopper 1, so that the telescopic rod 22 is accurately inserted into the corresponding mounting hole at the bottom of the coal hopper 1, ensuring that the telescopic material port 21 can slide up and down smoothly at the bottom of the coal hopper 1 and maintain a certain initial position by relying on the compression spring 23 without external force. Then, according to the requirements of the previous preparation of the components, connect one end of the cable 27 to the connecting plate 24 on the side wall of the telescopic material port 21, and then pass around the first guide wheel 26 at the bottom of the coal hopper 1 and the second guide wheel 29 at the top in turn, and finally connect the other end of the cable 27 to the third articulated frame 18 in the linkage assembly, so as to realize the linkage between the telescopic material port 21 and the linkage assembly, so that when the auxiliary coal drop plate 8 is in motion, the telescopic material port 21 can be driven by the cable 27 to move up and down synchronously.

[0065] Debugging and installation of motor 4 and reducer 5

[0066] Connect the motor 4 with the reducer 5 installed with a temporary power supply, and perform no-load debugging to check whether the rotation direction of the motor 4 is correct, whether the reduction ratio of the reducer 5 meets the design requirements, and whether the entire transmission system including the shaft 7, the main gear 12, the auxiliary gear 13, etc. can operate smoothly under the drive of the motor 4. If any problems are found, adjust the wiring of the motor 4 or check the installation of each transmission component in time. After the no-load debugging is normal, the installation of the motor 4 and the reducer 5 is finally fixed to ensure that it is stable and reliable, and the formal power supply line and the corresponding control line are connected, so that the start and stop and speed adjustment of the motor 4 can be controlled remotely or locally in the future.

[0067] 3. Operation and debugging process

[0068] Initial operation check

[0069] Put a small amount of coal in the coal hopper 1 for the first test run, start the motor 4, observe the rotation of the shaft 7, check whether the main gear 12 drives the secondary gear 13 to rotate smoothly, whether the power transmitted through the yoke shaft 14, the slot frame 15, the pull rod 19 and other components can make the auxiliary coal drop plate 8 vibrate according to the design requirements, and observe whether the telescopic material port 21 moves up and down synchronously with the vibration of the auxiliary coal drop plate 8 under the drive of the cable 27, and whether the spiral conveying piece 20 can push the coal at the bottom of the coal hopper 1 when rotating, so that the coal can flow smoothly to the telescopic material port 21 and discharge. In this process, if any component is found to have abnormal friction sound, jamming or unsmooth movement, stop the motor 4 immediately, and check and adjust the corresponding components, such as checking the meshing of the gears, whether the hinge point is flexible, and the tension of the cable 27.

[0070] Coal flow and feeding speed regulation

[0071] Gradually increase the amount of coal loaded into the coal hopper 1, and control the operating state of the entire linkage system by adjusting the speed of the motor 4 according to the actual needs of the power plant for the coal unloading flow rate and speed. When it is necessary to increase the coal unloading flow rate, increase the speed of the motor 4, and speed up the rotating shaft 7, so that the vibration frequency of the auxiliary coal dropping plate 8 increases, and the stirring of the coal on the inner wall of the coal hopper 1 is more intense. At the same time, the up and down movement amplitude of the telescopic material opening 21 will also increase accordingly, the opening will become larger, and the pushing effect of the spiral conveying piece 20 will also be stronger, thereby realizing an increase in the coal unloading flow rate; conversely, when it is necessary to reduce the unloading flow rate, it can be achieved by reducing the speed of the motor 4. During the adjustment process, closely observe the coal unloading situation, and combine the data feedback of the flow monitoring device installed on the downstream conveying equipment, such as the speed of the motor 4, to accurately adjust the speed of the motor 4 so that the coal unloading flow rate is stable within the required range.

[0072] Long-term operation maintenance and inspection

[0073] During the normal production and operation of the power plant, the coal hopper is in long-term use and needs to be regularly maintained and inspected. For example, at regular intervals, such as weekly or monthly, it is determined according to the actual operation conditions, and the machine is shut down to check the wear of each component, and check whether the wear-resistant coating 30 on the surface of the auxiliary coal drop plate 8 is detached or severely worn. If necessary, it should be repaired or replaced in time; check the wear of the cable 27, especially the part where the cable 27 contacts the guide wheel. If the outer wear-resistant rubber protective sleeve 31 is found to be seriously damaged, consider replacing the cable 27; add an appropriate amount of grease to the meshing part of the gear to ensure the smoothness of the gear transmission; check the working conditions of the telescopic rod 22 and the compression spring 23 to ensure that the up and down movement of the telescopic material port 21 is still flexible and reliable; at the same time, check whether the operating parameters of the power equipment such as the motor 4 and the reducer 5, such as temperature, current, etc., are normal, and make corresponding maintenance records, so as to timely discover potential problems and deal with them, to ensure that the coal hopper can operate stably and reliably for a long time and meet the coal transportation needs of the power plant.

[0074] Through the above detailed specific implementation methods, the coal hopper of the power plant can be effectively implemented from component preparation, installation to final operation and subsequent maintenance, ensuring that it plays the expected functions of the design, improving the efficiency and controllability of coal unloading, and providing strong guarantee for the normal production and operation of the power plant.

[0075] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A coal hopper for a power plant, comprising a coal hopper (1), wherein the main body of the coal hopper (1) is in the shape of an inverted quadrangular pyramid and is hollow inside, wherein the four inner walls of the coal hopper (1) are provided with auxiliary coal dropping plates (8), wherein the upper ends of the auxiliary coal dropping plates (8) are provided with shafts (9), wherein both ends of the shafts (9) are hinged with first hinge frames (10), wherein the first hinge frames (10) are respectively fixed to the inner walls of the coal hopper (1), and wherein the auxiliary coal dropping plates (8) are provided with second hinges on one side close to the center of the coal hopper (1). The connecting frame (11), the top of the second articulated frame (11) is hinged with a pull rod (19), the top of the pull rod (19) is connected with a linkage component for controlling the regular vibration of the auxiliary coal dropping plate (8), the four corners of the top of the coal hopper (1) are provided with diagonal support frames (2), the top of the diagonal support frames (2) are tilted toward the center of the coal hopper (1), the top of the diagonal support frames (2) are horizontally provided with the same mounting plate (3), the center of the mounting plate (3) is rotatably inserted with a rotating shaft (7), characterized in that, The linkage assembly comprises a main gear (12) sleeved on the outer peripheral surface of the rotating shaft (7); the outer edge of the main gear (12) is meshed with four sub-gears (13); the sub-gears (13) are rotatably mounted on the bottom of the mounting plate (3); a yoke shaft (14) is provided at an eccentric position at the bottom of the sub-gear (13); a notch frame (15) is slidably sleeved on the lower part of the yoke shaft (14); the notch frame (15) is provided with a notch (151); the yoke shaft (14) is slidably inserted into the inside of the notch (151); the yoke Slides (16) are provided at both ends of the shaft (14), and slides (17) are slidably inserted into the slides (16), and the slides (17) are fixed to the bottom of the mounting plate (3). A third hinged frame (18) is fixed to the bottom of the slot frame (15), and the third hinged frame (18) is respectively hinged to the top of the adjacent pull rod (19). A telescopic material port (21) is slidably inserted into the bottom of the coal hopper (1), and a linkage telescopic component for controlling the up and down movement of the telescopic material port (21) is provided on the side wall of the telescopic material port (21).

2. A power plant coal hopper according to claim 1, characterized in that: The linkage telescopic assembly comprises a connecting plate (24) transversely arranged on the four outer walls of the telescopic material port (21), the top of each of the connecting plates (24) is connected to a cable (27), the linkage telescopic assembly also comprises a second bracket (28) arranged on the four upper walls of the coal hopper (1), the top of each of the second brackets (28) is hinged to a second guide wheel (29), the second guide wheel (29), the linkage telescopic assembly also comprises a first bracket (25) arranged on the four lower walls of the coal hopper (1), the ends of each of the first brackets (25) are hinged to a first guide wheel (26), the cables (27) are respectively wound around the outer circumferences of the first guide wheel (26) and the second guide wheel (29) on the adjacent side, and the top of each of the cables (27) is connected to a third hinged frame (18) on the adjacent side.

3. A coal hopper for a power plant according to claim 1, characterized in that: The four corners of the top of the telescopic material opening (21) are vertically provided with telescopic rods (22), the telescopic rods (22) are slidably inserted into the bottom of the coal hopper (1), and the outer circumference of the telescopic rods (22) is sleeved with compression springs (23).

4. A coal hopper for a power plant according to claim 1, characterized in that: The outer peripheral surface of the bottom of the rotating shaft (7) is sleeved with a spiral conveying sheet (20).

5. A coal hopper for a power plant according to claim 1, characterized in that: A reducer (5) is coaxially arranged on the top of the rotating shaft (7), and a motor (4) is coaxially arranged on the top input end of the reducer (5).

6. A coal hopper for a power plant according to claim 1, characterized in that: The surface of the auxiliary coal dropping plate (8) is provided with a wear-resistant coating (30), the thickness of the wear-resistant coating (30) is in the range of 3-5 mm, and the wear-resistant coating (30) is made of tungsten carbide material, which is used to enhance the wear resistance of the auxiliary coal dropping plate (8) during long-term contact and friction with coal, thereby extending the service life of the auxiliary coal dropping plate (8).

7. A coal hopper for a power plant according to claim 2, characterized in that: The cable (27) is a high-strength galvanized steel wire rope with a diameter of 8-10 mm, and the outer surface of the cable (27) is wrapped with a layer of wear-resistant rubber protective sleeve (31), and the thickness of the wear-resistant rubber protective sleeve (31) is not less than 2 mm, so as to reduce the wear of the cable (27) caused by friction with the guide wheel and long-term external force during the transmission process, thereby improving the reliability and durability of the linkage telescopic component.

8. A coal hopper for a power plant according to claim 4, characterized in that: The pitch of the spiral conveying piece (20) is 20-30 cm, the spacing between adjacent spiral conveying pieces (20) is 10-15 cm, the thickness of the spiral conveying piece (20) is 5-8 mm, and the outer edge of the spiral conveying piece (20) is provided with an arc-shaped guide surface (32), the curvature radius of the arc-shaped guide surface (32) is 10-15 cm, so that the coal can flow more smoothly to the telescopic material port (21) under the push of the spiral conveying piece (20), thereby improving the efficiency of coal discharge from the bottom of the coal hopper (1).

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