A coal feeding device for thermal power station and its control system

Abstract

The present invention discloses a coal feeding device for a thermal power station and a control system thereof, the device comprises a coal injection port, a first conveying device, a second conveying device, a feeding transmission device and a third conveying device, the feeding end of the third conveying device is connected with a feeding seat, the first conveying device is fixed with a camera, and the transmission feeding end of the first conveying device is connected with a first material guide seat. The control system realizes alternating cycle weighing of the transmitted coal body through the design of double feeding transmission devices, when one of the feeding transmission devices is unloading, the other feeding transmission device will be fed and weighed through the rotation of the second material guide seat, so that the coal feeding device can realize weight monitoring of the coal body during the coal feeding process, effectively enhancing the functionality and practicality of the coal feeding device, therefore, under the principle of quantitative power generation, the cumbersome process of independent weighing is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal feeding equipment for thermal power plants, and in particular relates to a coal feeding device for thermal power plants and a control system thereof. Background Art

[0002] A thermal power plant, also known as a thermal power plant, is a factory that uses combustibles as fuel to produce electricity. When burned, the fuel heats water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy. For thermal power plants, coal is the main fuel for combustibles. In the process of combustion and power generation, the coal needs to be transported and placed into the relevant combustion furnace through coal-feeding equipment.

[0003] The coal feeding devices commonly used on the market are mainly conveying devices. Since the amount of coal burned is proportional to the amount of power generated, and it is also based on the purpose of resource conservation, the coal burned must follow the principle of quantitative power generation and be fed. During pre-power generation, the power generation is estimated according to actual needs, and the amount of coal used is calculated. The coal is then weighted accordingly based on the amount used. Therefore, before or after the coal is transported to the power plant, the coal needs to be piled and weighed in accordance with the principle of quantitative power generation, and different amounts of coal need to be stored independently, which adds a coal weighing process to the coal feeding process, which involves human resource expenditures and cumbersome weighing processes. Summary of the invention

[0004] The object of the present invention is to provide a coal feeding device and a control system thereof for a thermal power station, so as to solve the problem proposed in the above background technology that the thermal power plant, for the purpose of resource conservation, follows the principle of quantitative power generation, so that the coal feeding process includes an independent process of coal weight supervision, which involves human resource expenditure and cumbersome weighing process.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] 14. The method of claim 13 wherein the first gear is mounted on a support frame and the second gear is mounted on a support frame of the first gear. The method of claim 14 wherein the gear is mounted on a support frame and the support frame is mounted on a support frame. The method of claim 14 wherein the gear is mounted on a support frame and the support frame is mounted on a support frame. The auxiliary seats are composed of a rotating seat and a fixed seat, the fixed seat is embedded in the rotating seat, a circular gear track is provided on the outer wall of the rotating seat, the second motor is meshed and connected with the circular gear track through a gear assembly, a limiting side plate of an integrated structure is provided at the edge of the outer ring of the rotating seat, the loading seat is a square structure, the four ends of the loading seat are provided with storage grooves, the center position of the loading seat is provided with a circular slot, the loading seat is embedded in the limiting side plate at the edge of the outer ring of the rotating seat through the circular slot and is welded with the limiting side plate to form an integrated structure The weighing assembly consists of an arc-shaped carrier plate, a weighing seat and a limit connecting block. The limit connecting block is welded and fixed to the bottom of the arc-shaped carrier plate through a support frame. A slot hole and a fixing plate are provided on the top of the weighing seat. The limit connecting block is embedded in the slot hole and is fixed by the fixing plate. An electronic weighing plate is fixed on the inner bottom surface of the slot hole. A control box is connected to the bottom of the weighing seat. Fixed plates are provided on both sides of the weighing seat. The weighing seat is locked and fixed to the inner wall of the fixing seat on the main seat and the auxiliary seat through the fixing plates and the external support rods.

[0007] Preferably, the rotating seat is provided with a fixed seat connecting slot hole, the fixed seat connecting slot hole is provided with a limited rotation slot, the outer wall of the fixed seat is provided with a limited rotation buckle, the fixed seat is limited in the rotating seat limited rotation slot by the limited rotation buckle, the fixed seat is provided with a line through hole, and the outer wall of the fixed seat is provided with a fixing sheet;

[0008] Preferably, an annular sliding buckle is welded at the bottom of the limiting side plate welded to the outer ring of the rotating seat of the main seat and the auxiliary seat, and sliding grooves are provided on both sides of the top surface of the arc-shaped carrier plate, and the annular sliding buckle is engaged with the sliding groove;

[0009] Preferably, the material storage trough is in a communicating structure with the circular slot hole at the center of the material loading seat, an inclined plate is provided between the material storage troughs at the four ends of the material loading seat, a shovel plate is welded at the bottom of the inclined plate, and the size of the gap between the limiting side plates welded to the outer rings of the rotating seats of the main seat and the auxiliary seat matches the size of the shovel plate;

[0010] Preferably, the size of the limit connection block matches the size of the electronic weighing plate at the bottom of the weighing seat, and the support frame between the limit connection block and the arc-shaped carrier plate is provided in multiple groups and is in a transversely distributed structure;

[0011] Preferably, the gear assembly comprises a first gear and a second gear, the first gear is connected to the transmission end of the second motor, the second gear is meshed with the first gear and the circular rack respectively, and the first gear and the second gear are of the same size;

[0012] A control system for a coal feeding device of a thermal power station, the control system comprising a control terminal, the control terminal comprising an equipment control module, a data acquisition module, a calculation module and a database;

[0013] The modules in the above system are described as follows:

[0014] The equipment control module is used to perform execution control on the first motor, the second motor and the conveying motors of the three conveying devices in the coal feeding device, and the equipment control module includes an execution control unit, and the equipment control module is respectively connected to the first motor, the second motor and the conveying motors of the three conveying devices;

[0015] The data acquisition module is used to collect image data captured by the camera and weighing data monitored by the control box on the electronic weighing plate. The data acquisition module includes a data determination unit and a data transmission unit. The data acquisition module is connected to the camera and the control box respectively.

[0016] The calculation module is used for superimposing the start-stop gap times (weighing times) of the second motors in the two groups of unloading transmission devices and the weighing data;

[0017] The database is used for setting parameters / thresholds related to the coal feeding device and storing data calculated by the calculation module. The database is provided with a threshold setting unit and a data storage unit. The threshold setting unit includes the first motor rotation speed / angle range threshold, the second motor rotation speed / angle / number of revolutions / time threshold, the first unloading material transmission device and the second unloading material transmission device weighing times / weighing thresholds and the first conveying device, the second conveying device and the third conveying device transmission rate / time thresholds. The first unloading material transmission device and the second unloading material transmission device weighing times / weighing thresholds include a single weighing threshold and a total coal feeding threshold.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The coal feeding device realizes alternating cyclic feeding of the transmitted coal body through the design of double feeding transmission devices. At the same time, the feeding transmission device adopts a double-seat interlocking rotating structure. The rotating seat can be driven by a motor to realize independent rotation of the rotating seat on the fixed seat. The loading seat on the rotating seat adopts a square hollow multi-slot structure to cooperate with the rotation of the rotating seat. After the conveyed coal body is fed into the slot body, the coal body will fall directly on the arc-shaped carrier plate. The amount of coal in the slot body is weighed by the electronic weighing plate connected to the arc-shaped carrier plate. After weighing, unloading is realized by rotation. When one of the feeding transmission devices is unloading, the other feeding transmission device is filled and weighed through the rotation of the second feeding seat, thereby realizing alternating cyclic feeding and weighing of the coal feeding device, so that the coal feeding device can realize weight monitoring of the coal body during the coal feeding process, effectively enhancing the functionality and practicality of the coal feeding device. Therefore, under the principle of quantitative power generation, the cumbersome process of independent weighing is reduced;

[0020] 2. The coal feeding device can set different thresholds through the control system to weigh and limit the coal in the upper storage tank of the feeding transmission device, and can also limit the total amount of coal for power generation, thereby realizing the automatic supervision of quantitative coal feeding in the entire coal feeding process, thereby following the concept of automatic management of coal feeding and realizing the intelligence and functionality of the coal feeding device;

[0021] 3. With the cooperation of the control system, this coal feeding device supports two coal feeding modes, including direct injection mode and quality monitoring mode. The direct injection mode is for the coal body that has been weighed before coal feeding, and a fixed amount of coal is directly fed through a rotating feeding transmission device. The quality monitoring mode is for the coal body that has not been weighed before coal feeding, and the coal quantity is controlled. Therefore, this coal feeding device supports the choice of two coal feeding methods, effectively realizing the diversified choice of coal feeding methods and meeting the actual application of the coal feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the coal feeding device of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the rotating seat of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the fixing seat of the present invention;

[0025] Figure 4 It is a schematic diagram of the connection structure between the weighing assembly and the auxiliary seat of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the weighing assembly of the present invention;

[0027] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0028] Figure 7 It is a schematic diagram of the overall structure of the material carrier of the present invention;

[0029] Figure 8 It is a schematic diagram of the connection structure between the material storage tank and the auxiliary seat of the present invention;

[0030] Fig. 9 It is the overall process architecture diagram of the control system of the present invention;

[0031] Fig.10 This is a control flow chart for the control system of the present invention for selecting different coal feeding modes.

[0032] In the figure: 1-coal injection port;

[0033] 2-first conveying device, 201-camera, 202-first material guiding seat;

[0034] 3-second conveying device, 301-base frame, 302-second material guiding seat, 303-first motor;

[0035] 4- Unloading transmission device;

[0036] 5-third conveying device, 501-feeding seat;

[0037] 6- Second motor;

[0038] 7-gear assembly, 701-first gear, 702-second gear;

[0039] 8-loading seat, 801-storage trough, 802-inclined plate, 803-shovel plate;

[0040] 9-transmission assembly, 901-main seat, 902-auxiliary seat, 903-rotating seat, 904-fixed seat, 905-circular gear rail, 906-limiting side plate, 907-line through hole, 908-annular sliding buckle;

[0041] 10-weighing assembly, 1001-arc-shaped carrier plate, 1002-weighing seat, 1003-limiting connecting block, 1004-control box, 1005-slide, 1006-fixed plate. DETAILED DESCRIPTION

[0042] 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.

[0043] See also Figure 1-10 , the present invention provides a technical solution:

[0044] A coal feeding device for a thermal power station, comprising a coal injection port 1, a first conveying device 2, a second conveying device 3, a material feeding transmission device 4 and a third conveying device 5;

[0045] The specific structure is as follows:

[0046] Including, firstly, a feeding seat 501 is connected to the unloading end of the third conveying device 5;

[0047] Secondly, a camera 201 is fixed on the first conveyor 2, and the transmission unloading end of the first conveyor 2 is connected to the first material guide seat 202. Both sides of the first material guide seat 202 are fixed to the bracket of the transmission unloading end of the first conveyor 2 through a connecting frame and screws. The transmission unloading end of the second conveyor 3 is provided with a guide assembly, which is composed of a base frame 301, a second material guide seat 302 and a first motor 303. The first motor 303 is fixed to the base frame 301 by screws, and the base frame 301 is welded to the bracket of the transmission unloading end of the second conveyor 3. The transmission end of the first motor 303 is connected to the seat body at the bottom of the second material guide seat 302;

[0048] Thirdly, the material unloading transmission device 4 includes a first material unloading transmission device and a second material unloading transmission device, both of which are composed of a second motor 6, a gear assembly 7, a loading seat 8, a transmission assembly 9 and a weighing assembly 10, the transmission assembly 9 includes a main seat 901 and a sub-seat 902, both of which are composed of a rotating seat 903 and a fixed seat 904, the fixed seat 904 is embedded in the rotating seat 903, a circular rack 905 is provided on the outer wall of the rotating seat 903, the second motor 6 is meshed and driven with the circular rack 905 through the gear assembly 7, and a limiting side plate 906 of an integrated structure is provided at the outer edge of the rotating seat 903;

[0049] Fourthly, the material loading seat 8 is of a square structure, and material storage grooves 801 are provided at the four ends of the material loading seat 8. A circular slot is provided at the center of the material loading seat 8. The material loading seat 8 is embedded in the limiting side plate 906 at the outer edge of the rotating seat 903 through the circular slot and is welded to the limiting side plate 906 to form an integrated structure;

[0050] Fifth, the weighing assembly 10 is composed of an arc-shaped carrier plate 1001, a weighing seat 1002 and a limit connecting block 1003. The limit connecting block 1003 is welded and fixed to the bottom of the arc-shaped carrier plate 1001 through a support frame. A slot hole and a fixing plate 1006 are provided on the top of the weighing seat 1002. The limit connecting block 1003 is embedded in the slot hole and is limited and fixed by the fixing plate 1006. An electronic weighing plate is fixed on the inner bottom surface of the slot hole. A control box 1004 is connected to the bottom of the weighing seat 1002. Fixed plates are provided on both sides of the weighing seat 1002. The weighing seat 1002 is locked and fixed to the inner wall of the fixing seat 904 on the main seat 901 and the auxiliary seat 902 through the fixing plates and the external support rods.

[0051] Based on the above three contents and combined Figure 2 , Figure 3 , further explained, the rotating seat 903 is provided with a fixed seat connecting slot hole, the fixed seat connecting slot hole is provided with a limited rotation slot, the outer wall of the fixed seat 904 is provided with a limited rotation buckle, the fixed seat 904 is limited in the limited rotation slot of the rotating seat 903 by the limited rotation buckle, the fixed seat 904 is provided with a line through hole 907, and the outer wall of the fixed seat 904 is provided with a fixing sheet;

[0052] According to the above description, it is further explained that the fixed seat connection slot hole is the embedded slot hole of the fixed seat 904. At the same time, the limit rotation groove on the fixed seat embedded slot hole is embedded with the limit rotation buckle on the outer wall of the fixed seat 904, thereby realizing the formation of an independent rotation structure between the fixed seat 904 and the rotating seat 903. By fixing the fixed seat 904, the rotation of the rotating seat 903 can be realized. According to the actual situation, it is necessary to add lubricating oil at the connection between the limit rotation groove and the fixed seat embedded slot hole, thereby improving the smoothness of the rotation and reducing friction.

[0053] The line through hole on the fixing seat 904 is mainly used to facilitate the connection of the connection lines involved in the control box 1004 on the weighing assembly 10. Through the line through hole, the line connection between the control box 1004 and the control terminal can be realized. At the same time, the fixing seat 904 can be fixed to an external fixing member (including any one of the related components such as the connecting frame / connecting rod) through the fixing sheet, thereby fixing the entire unloading transmission device;

[0054] Combination Figure 4 . Figure 5 , Figure 6 , further explained, the bottom of the limiting side plate 906 welded to the outer ring of the rotating seat 903 of the main seat 901 and the auxiliary seat 902 is welded with an annular slide buckle 908, and both sides of the top surface of the arc-shaped carrier plate 1001 are provided with a slide groove 1005, and the annular slide buckle 908 is engaged with the slide groove 1005;

[0055] According to the above description, it is further explained that the annular sliding buckle 908 is engaged with the slide groove 1005, mainly to provide a rotation limit for the rotating seat 903 on the arc-shaped carrier plate 1001, so that the rotating seat 903 can stably slide in a directional manner according to the track of the slide groove 1005, and at the same time, the stability between the arc-shaped carrier plate 1001 and the rotating seat 903 is ensured to avoid the phenomenon of position deviation caused by external force;

[0056] In view of the above four contents and combined with Figure 7 , Figure 8 , further explained, the storage trough 801 and the circular slot hole at the center of the loading seat 8 are in a connected structure, and an inclined plate 802 is provided between the storage troughs 801 at the four ends of the loading seat 8, and a shovel plate 803 is welded to the bottom of the inclined plate 802. At the same time, the gap between the limiting side plates 906 welded to the outer ring of the rotating seat 903 of the main seat 901 and the auxiliary seat 902 is consistent with the size of the shovel plate 803;

[0057] According to the above description, it is further explained that, through the above, it is known that the material carrier 8 is a hollow structure, the inclined plate 802 mainly divides the material storage troughs 801 at the four ends, so that independent troughs are formed between the material storage troughs 801, and there is an inclination structure between the shovel plate 803 and the inclined plate 802. At the same time, the shovel plate 803 is in contact with the surface of the arc-shaped carrier plate 1001. When the coal body is injected into the material storage trough 801, the second motor 6 drives the material carrier 8 to rotate, and the shovel plate 802 drives the coal body on the arc-shaped carrier plate 1001 in the material storage trough 801 to shovel, thereby driving the coal body and the material storage trough 801 to move synchronously until the material is unloaded;

[0058] In view of the above five contents and combined Figure 4 , Figure 5 , further explained, the size of the limit connection block 1003 matches the electronic weighing plate at the bottom of the weighing seat 1002, and the support frame between the limit connection block 1003 and the arc-shaped carrier plate 1001 is provided with multiple groups and is in a transverse distribution structure;

[0059] According to the above content, it is further explained that after the two sides of the weighing seat 1002 are fixed to the inner wall of the fixing seat 904 through the fixing plates, the position of the weighing seat 1002 is limited, and at the same time, the arc-shaped carrier plate 1001 will contact the electronic weighing plate inside the weighing seat 1002 through the limiting connecting block 1003. When the coal body provides pressure to the arc-shaped carrier plate 1001, the arc-shaped carrier plate 1001 provides pressure to the electronic weighing plate. The electronic weighing plate sets the initial weighing value of the electronic weighing plate through the control box, and removes the weight of the arc-shaped carrier plate 1001 itself and the incidental weight caused by external factors such as the loading seat 8, so as to provide pressure to the coal body on the arc-shaped carrier plate 1001. Weighing, since the size of the limit connection block 1003 and the slot hole at the bottom of the weighing seat 1002 are completely matched, when the rotating seat 903 rotates, the interlocking structure matches the fixation of the weighing seat 1002, and therefore, the limit of the connection limit block 1003 by the fixed plate 1006 effectively ensures the stability of the limit connection block 1003. The limit connection block 1003 and the slot hole are directly interlocked, and there is no need to fix them through related components. According to actual conditions, the slot hole depth and the thickness of the limit connection block 1003 can be adjusted during manufacturing, which further improves the interlocking stability of the limit connection block 1003.

[0060] Combination Figure 1 , Figure 2 and Figure 3 , further explained, the gear assembly 7 includes a first gear 701 and a second gear 702, the first gear 701 is connected to the transmission end of the second motor 6, the second gear 702 is respectively meshed with the first gear 701 and the circular rack 905, and the first gear 701 and the second gear 702 are the same size;

[0061] According to the above content, it is further explained that the gear assembly 7 mainly realizes the transmission function. Under the transmission of the second motor, the gear assembly 7 realizes the rotation of the rotating seat 903 through meshing transmission, thereby realizing the cyclic loading, weighing and unloading of the coal body on the unloading transmission device;

[0062] In summary, the driving equipment involved in the coal feeding device will be monitored by the control system. The control system includes a control terminal, which is composed of an equipment control module, a data acquisition module, a calculation module and a database. The details are as follows:

[0063] ① The equipment control module is used to execute control on the first motor, the second motor and the conveying motors of the three conveying devices in the coal feeding device;

[0064] ②The data acquisition module is used to collect image data captured by the camera and weighing data monitored by the control box on the electronic weighing plate;

[0065] ③ The calculation module is used to weigh the start-stop gap times of the second motor in the two sets of unloading transmission devices and to perform superposition calculation on the weighing data;

[0066] ④The database is used to set the relevant parameters / thresholds of the coal feeding device and store the data calculated by the calculation module.

[0067] Based on the above system contents, the specific description is as follows:

[0068] According to the above content ①, it is further explained that the equipment control module includes an execution control unit, and the equipment control module is respectively connected to the first motor, the second motor and the conveying motors of the three conveying devices;

[0069] The execution control unit mainly performs adaptive control on the first motor, the second motor and the conveying motor according to the first motor rotation speed / angle range threshold, the second motor rotation speed / angle / number of turns threshold, the first unloading conveying device and the second unloading conveying device weighing times / weighing threshold and the first conveying device, the second conveying device and the third conveying device transmission rate / time threshold in the database, so as to achieve the precision and accuracy of the motor control;

[0070] It should be noted that the motors used for the first motor, the second motor and the transmission motor are all traditional three-phase asynchronous motors, and the specific models and sizes are selectively installed according to actual conditions;

[0071] According to the above content ②, it is further explained that the data acquisition module includes a data determination unit and a data transmission unit, and the data acquisition module is connected to the camera and the control box respectively;

[0072] Among them, the data acquisition module adopts data acquisition software to receive the weight monitoring data of the control box. The control box adopts a data monitoring mainboard matched with the electronic weighing board. The data monitoring mainboard is respectively connected to the data interface of the electronic weighing board and the control terminal to realize data transmission. The relevant data acquisition software can be used, such as Apache Flume and other relevant data acquisition software. At the same time, the data judgment unit mainly judges the received image data or weighing data. After the image data is received, the control terminal will execute the control of the relevant transmission device. After the weighing data is received, the control terminal sends instructions to the execution control module according to the weighing data. The execution control module respectively adaptively controls the first motor and the second motor, and also transmits the weighing data to the calculation module for adaptive calculation. For the judgment unit, the corresponding judgment function of the judgment computer can be inserted into the relevant acquisition software to realize the acquisition judgment;

[0073] According to the above ③, it is further explained that the calculation module also uses computer-related overlapping functions to perform superposition calculations on the data after each weighing;

[0074] According to the above content ④, it is further explained that a threshold setting unit and a data storage unit are provided in the database, and the threshold setting unit includes the first motor rotation speed / angle range threshold, the second motor rotation speed / angle / number of turns threshold, the first unloading material transmission device and the second unloading material transmission device weighing times / weighing threshold and the first transmission device, the second transmission device and the third transmission device transmission rate / time threshold.

[0075] The weighing times / weighing thresholds of the first unloading conveying device and the second unloading conveying device include a single weighing threshold and a total amount of coal input threshold;

[0076] Further elaborated, the first motor rotation speed / angle range threshold, the threshold of the first motor, limits the rotation speed and angle of the second material guide seat to ensure that the second material guide seat can correspond to the position of the first material unloading transmission device and the material storage tank of the second material unloading transmission device respectively, to ensure the accuracy of unloading;

[0077] The second motor rotation speed / angle / number of revolutions / time threshold, the threshold of the second motor, limits the rotation position of the rotating seat, ensures the accuracy of the rotation position of the storage tank on the loading seat, ensures the correspondence between the position of the different storage tanks on the loading seat and the second material guide seat after rotation, and the second motor rotation time threshold is the extended time threshold to ensure the completion of the last unloading;

[0078] The weighing times / weighing thresholds of the first unloading conveying device and the second unloading conveying device include the single weighing threshold and the total amount of coal input threshold, which mainly limit the total amount of coal input and the independent weighing weight of each storage tank weighing, so as to achieve the effect of quantitative coal input;

[0079] The transmission rate / time thresholds of the first conveyor, the second conveyor and the third conveyor, wherein the time threshold is the extended time threshold, ensuring that the coal body after weighing is completely discharged;

[0080] Based on the above and refer to Fig.10 The coal feeding device can realize two modes: direct injection mode (rough injection) and quality monitoring mode (fine injection). The direct injection mode (rough injection) means that when a certain amount of coal is fed under the coal body, it can be directly fed through the device without weighing. The specific process is as follows:

[0081] S1. The coal injection port is opened to inject coal onto the first conveyor. The camera will monitor the coal injection port unloading situation in real time, take pictures and send them to the control terminal, and start the first conveyor and the second conveyor through the control terminal;

[0082] S2. The first motor on the second conveying device is in the default state (the second material introduction seat corresponds to the position of the first material delivery device);

[0083] S3. Select the direct coal injection mode through the control terminal. In this mode, there is no need to set the threshold value and open the electronic weighing plate through the control terminal;

[0084] S4. Start the second motor on the first unloading device directly through the control terminal, the second motor drives the seat of the transmission assembly to rotate through the gear assembly, and the rotating seat drives the loading seat to rotate, so that the storage slots at different positions on the loading seat are alternately provided with loads for the coal body unloaded by the second guide seat;

[0085] S5. The loading seat during the rotation process realizes cyclic feeding by rotating, so that the coal body is fed to the third conveying device and finally fed through the feeding seat;

[0086] Quality monitoring mode (precision feeding) is to set the threshold value through the control terminal to realize the cyclic weighing and feeding of the first feeding conveyor and the second feeding conveyor. The specific process is as follows:

[0087] The difference between the quality monitoring mode (fine injection) and the direct injection mode (rough injection) is that

[0088] S3. Select the quality monitoring mode through the control terminal. In this mode, the threshold is set through the control terminal. The set threshold includes the weighing times / weighing thresholds of the first unloading conveyor and the second unloading conveyor (including the single weighing threshold and the total amount of coal input threshold), and the electronic weighing plate on the unloading conveyor is started at the same time;

[0089] It should be noted that the first motor rotation speed / angle range threshold and the second motor rotation speed / angle / number of revolutions threshold are fixed thresholds of the control terminal and do not need to be adjusted. If the first material unloading transmission device and the second material unloading transmission device need to be replaced or the gap distance between the first material unloading transmission device and the second material unloading transmission device needs to be adjusted, the first motor rotation speed / angle range threshold and the second motor rotation speed / angle / number of revolutions threshold need to be exchanged;

[0090] S6. The second motor on the first material unloading transmission device drives the rotating seat to rotate through the gear assembly, and the rotating seat body drives the material carrier to rotate. The second motor ensures that the storage slots at different positions on the material carrier correspond to the positions of the second material guide seat according to the limited threshold of the rotation angle / number of turns set in the database;

[0091] S7. The coal on the second material guide seat falls into the corresponding storage tank on the loading seat, and the arc-shaped carrier plate will provide support for the coal. The electronic weighing plate will weigh the coal in the storage tank through the arc-shaped carrier plate. When the weight reaches the weight threshold set in the database, the data acquisition module will collect the specific value of this time, and the calculation module will record the number of weighings;

[0092] S8. At this time, the control terminal will start the first motor, and the first motor will drive the second material guide seat to rotate to the storage tank of the material loading seat on the second material unloading transmission device, unload the material from the tank, and the electronic weighing plate on the second material unloading transmission device will monitor the weight. When the threshold is reached, the data acquisition module will collect the specific value of this weighing, and superimpose the value in step S7 for calculation, and the calculation module will superimpose the number of weighing times;

[0093] S9. When the second unloading conveying device is unloading and weighing, the second motor of the first unloading conveying device will drive the seat body to rotate 90°, and another empty storage tank will replace the previously fully loaded storage tank. The fully loaded storage tank will move to the side end and be in a unloading state. After the second unloading conveying device is weighed, the second material guide seat will rotate to the first unloading conveying device again to unload, weigh, collect data, and perform superposition calculations on the empty storage tank;

[0094] S10. After reaching the set weighing times threshold / reaching the set total coal feeding threshold, the coal injection port stops unloading, and the camera cannot capture the unloading situation at the coal injection port. At this time, the control terminal will stop the operation of the first conveying device and the second conveying device, and the unloading transmission device of the last weighing will unload the material to the storage tank of the last weighing, and the equipment control module will delay the closure according to the extended operating time set by the third conveying device in the data to ensure complete feeding. The database will store and back up the specific values ​​and times of this coal feeding.

[0095] 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 feeding device for a thermal power station, characterized in that: It comprises a coal injection port (1), a first conveying device (2), a second conveying device (3), a material discharge transmission device (4) and a third conveying device (5); A feeding seat (501) is connected to the unloading end of the third conveying device (5); A camera (201) is fixed on the first conveying device (2); a transmission unloading end of the first conveying device (2) is connected to a first material guiding seat (202); two sides of the first material guiding seat (202) are fixed to a bracket of the transmission unloading end of the first conveying device (2) through a connecting frame and with screws; a guiding assembly is provided at the transmission unloading end of the second conveying device (3); the guiding assembly is composed of a base frame (301), a second material guiding seat (302) and a first motor (303); the first motor (303) is fixed to the base frame (301) by screws; the base frame (301) is welded to the bracket of the transmission unloading end of the second conveying device (3); and the transmission end of the first motor (303) is connected to a seat body at the bottom of the second material guiding seat (302); The material unloading transmission device (4) comprises a first material unloading transmission device and a second material unloading transmission device, the first material unloading transmission device and the second material unloading transmission device are both composed of a second motor (6), a gear assembly (7), a loading seat (8), a transmission assembly (9) and a weighing assembly (10), the transmission assembly (9) comprises a main seat (901) and a sub-seat (902), the main seat (901) and the sub-seat (902) are both composed of a rotating seat (903) and a fixed seat (904), the fixed seat (904) is embedded in the rotating seat (903), a circular rack (905) is provided on the outer wall of the rotating seat (903), the second motor (6) is meshed and transmission-connected with the circular rack (905) through the gear assembly (7), and a limiting side plate (906) of an integrated structure is provided at the outer edge of the rotating seat (903); The material loading seat (8) is of a square structure, and material storage grooves (801) are provided at the four ends of the material loading seat (8). A circular slot hole is provided at the center of the material loading seat (8). The material loading seat (8) is embedded in the limiting side plate (906) at the outer edge of the rotating seat (903) through the circular slot hole and is welded to the limiting side plate (906) to form an integrated structure; The weighing assembly (10) is composed of an arc-shaped carrier plate (1001), a weighing seat (1002) and a limit connection block (1003); the limit connection block (1003) is welded and fixed to the bottom of the arc-shaped carrier plate (1001) through a support frame; a slot hole and a fixing plate (1006) are provided on the top of the weighing seat (1002); the limit connection block (1003) is embedded in the slot hole and is fixed by the fixing plate (1006); an electronic weighing plate is fixed on the inner bottom surface of the slot hole; a control box (1004) is connected to the bottom of the weighing seat (1002); fixing plates are provided on both sides of the weighing seat (1002); the weighing seat (1002) is locked and fixed to the inner wall of the fixing seat (904) on the main seat (901) and the auxiliary seat (902) through the fixing plates and the external support rods.

2. A coal feeding device for a thermal power station according to claim 1, characterized in that: The rotating seat (903) is provided with a fixed seat connecting slot hole, the fixed seat connecting slot hole is provided with a limit rotation slot, the outer wall of the fixed seat (904) is provided with a limit rotation buckle, and the fixed seat (904) is limited in the limit rotation slot of the rotating seat (903) by the limit rotation buckle.

3. A coal feeding device for a thermal power station according to claim 1, characterized in that: The fixing seat (904) is provided with a circuit through hole (907), and the outer wall of the fixing seat (904) is provided with a fixing sheet.

4. A coal feeding device for a thermal power station according to claim 1, characterized in that: The bottom of the limiting side plate (906) welded to the outer ring of the rotating seat (903) of the main seat (901) and the auxiliary seat (902) is welded with an annular sliding buckle (908), and the two sides of the top surface of the arc-shaped carrier plate (1001) are provided with sliding grooves (1005), and the annular sliding buckle (908) is engaged with the sliding groove (1005).

5. A coal feeding device for a thermal power station according to claim 1, characterized in that: The material storage trough (801) is in a communicating structure with the circular slot hole at the center of the material loading seat (8); an inclined plate (802) is provided between the material storage troughs (801) at the four ends of the material loading seat (8); and a shovel plate (803) is welded to the bottom of the inclined plate (802); The size of the gap between the limiting side plates (906) welded to the outer rings of the rotating seats (903) of the main seat (901) and the auxiliary seat (902) is consistent with the size of the shovel plate (803).

6. A coal feeding device for a thermal power station according to claim 1, characterized in that: The size of the limit connection block (1003) matches the size of the electronic weighing plate at the bottom of the weighing seat (1002), and the support frame between the limit connection block (1003) and the arc-shaped carrier plate (1001) is provided in multiple groups and is in a transversely distributed structure.

7. A coal feeding device for a thermal power station according to claim 1, characterized in that: The gear assembly (7) comprises a first gear (701) and a second gear (702); the first gear (701) is connected to the transmission end of the second motor (6); the second gear (702) is meshedly connected to the first gear (701) and the circular rack (905) respectively; the first gear (701) and the second gear (702) are of the same size.

8. A control system for a coal feeding device of a thermal power station, characterized in that: The control system comprises at least one coal feeding device for a thermal power station as claimed in any one of claims 1 to 7, the control system comprises a control terminal, and the control terminal is composed of an equipment control module, a data acquisition module, a calculation module and a database; The equipment control module is used to perform execution control on the first motor, the second motor and the conveying motors of the three conveying devices in the coal feeding device; The data acquisition module is used to collect image data captured by the camera and weighing data monitored by the control box on the electronic weighing plate; The calculation module is used for superimposing the start-stop gap times (weighing times) of the second motors in the two groups of unloading transmission devices and the weighing data; The database is used for setting relevant parameters / thresholds of the coal feeding device and storing data calculated by the calculation module.

9. A control system for a coal feeding device of a thermal power station according to claim 8, characterized in that: The equipment control module comprises an execution control unit, and the equipment control module is respectively connected to the first motor, the second motor and the three groups of conveying motors of the conveying device.

10. A control system for a coal feeding device of a thermal power station according to claim 8, characterized in that: The data acquisition module comprises a data determination unit and a data transmission unit, and the data acquisition module is connected to the camera and the control box respectively; The database is provided with a threshold setting unit and a data storage unit, wherein the threshold setting unit includes a first motor rotation speed / angle range threshold, a second motor rotation speed / angle / number of revolutions / time threshold, a first unloading conveying device and a second unloading conveying device weighing times / weighing threshold, and a first conveying device, a second conveying device and a third conveying device transmission rate / time threshold; The weighing times / weighing thresholds of the first unloading material conveying device and the second unloading material conveying device include a single weighing threshold and a total amount of coal input threshold.

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