Raw material crushing equipment for preparing coal-saving denitration agent and control system of raw material crushing equipment

Abstract

The invention discloses raw material crushing equipment for preparing a coal-saving denitration agent and a control system of the raw material crushing equipment, and relates to the field of raw material crushing, the raw material crushing equipment comprises a hopper and a supporting shell, the lower side of the supporting shell is fixedly connected with a material collecting mechanism, and multiple sets of edge grinding mechanisms are distributed around the edge position of the material collecting mechanism. According to the coal-saving denitration agent raw material crushing device, coal-saving denitration agent raw materials are crushed for the first time through rotation of the conical rollers and under the cooperation effect of the conical shell, crushed particles slide onto the conical table, the crushed particles are ground through the multiple sets of grinding rings, and secondary crushing is achieved; weighing sensors in the first-stage screen assembly, the second-stage screen assembly and the third-stage screen assembly measure the weight of raw material particles at the same time, a feedback control unit judges collected data according to a preset threshold value, the operation states of an electric cylinder and a first servo motor are controlled according to the judgment result, and therefore secondary crushing is controlled, and the crushing efficiency is improved. The uniformity degree of raw material particles is improved, and the quality and performance of the coal-saving denitration agent are guaranteed to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of raw material crushing, in particular to a raw material crushing device for preparing a coal-saving denitrification agent and a control system thereof. Background Art

[0002] With increasingly stringent environmental protection requirements, reducing nitrogen oxide emissions during coal combustion has become an urgent issue. Coal-saving denitrification agents can effectively reduce the generation and emission of nitrogen oxides while improving coal combustion efficiency, which is of great significance for achieving energy conservation, emission reduction, and environmental protection.

[0003] For example, Chinese patent CN110624635A discloses a cone crusher, which includes a frame with a discharge port at the lower end of the frame; a transmission pipe is provided in the frame, a rotating shaft is rotatably connected in the transmission pipe, and a driving device connected to the rotating shaft is provided on the outer wall of the frame; an eccentric mechanism is provided in the frame, and a connecting assembly connected to the eccentric mechanism is provided on the rotating shaft; a connecting shaft to the eccentric mechanism is provided in the frame, and an extrusion block is provided on the connecting shaft; a protective device is provided in the frame, and the protective device includes a block provided in the frame, and the block is located above the transmission pipe.

[0004] However, in the prior art, the raw materials of coal-saving denitrification agents usually include a variety of different substances, such as powdered substances such as urea, ammonium chloride, melamine, and mineral powder substances such as manganese ore powder and magnesium ore powder. The physical properties of these raw materials, such as hardness, density, and particle size, vary greatly, and crushing equipment is required to be able to adapt to different material characteristics to ensure that all raw materials can be effectively crushed to the appropriate particle size. In order to ensure the performance and use effect of coal-saving denitrification agents, the crushing particle size of its raw materials needs to be strictly controlled. Generally speaking, different raw materials need to reach different particle size ranges. For example, catalyst raw materials such as manganese ore powder and magnesium ore powder are usually required to be crushed to about 200 mesh to ensure their catalytic activity in the reaction and sufficient mixing with other raw materials; existing crushing equipment such as cone crushers often find it difficult to evenly crush various raw materials to the required particle size when processing coal-saving denitrification agent raw materials. Various raw materials fail to meet the particle size requirements, thereby affecting the quality and performance of coal-saving denitrification agents. Summary of the Invention

[0005] The object of the present invention is to provide a raw material crushing device for preparing a coal-saving denitrification agent and a control system thereof, so as to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A raw material crushing device for preparing a coal-saving denitration agent, including a hopper and a support shell. A collecting mechanism is fixedly connected to the lower side of the support shell. A plurality of side rolling mechanisms are distributed around the edge position of the collecting mechanism. A conical crushing mechanism is movably connected to the middle of the collecting mechanism. The plurality of side rolling mechanisms are located outside the conical crushing mechanism. A classification and weighing mechanism is fixedly communicated with the lower side of the collecting mechanism;

[0007] The conical crushing mechanism is used for the first crushing of the coal-saving denitration agent raw materials. The side rolling mechanism and the conical crushing mechanism cooperate to perform the second crushing. The collecting mechanism is used for gathering the crushed coal-saving denitration agent raw materials and conveying them to the classification and weighing mechanism. The classification and weighing mechanism is used for classification and weighing;

[0008] The conical crushing mechanism includes a conical shell, a conical roller, a conical table, a stepped shaft and a power component. The conical shell is located outside the conical roller. The conical roller and the conical table are coaxially installed through the stepped shaft. The middle of the conical table protrudes upward. The side rolling mechanism includes a rolling component and an angle adjustment component. The rolling component includes a rolling ring, a connecting table, a sleeve seat, a connecting cover, a connecting disc and a first servo motor. The rolling ring is fixedly installed outside the connecting table. The connecting table is rotatably installed outside the sleeve seat and the first servo motor through a bearing. The sleeve seat is fixedly connected to the end of the first servo motor. The connecting disc penetrates through the middle of the sleeve seat and is fixedly connected to the output shaft of the first servo motor through a coupling. The connecting cover installs the rolling ring on one side of the connecting disc through bolts. The angle adjustment component is used to control the distance between the rolling ring and the conical table.

[0009] Preferably, the angle adjustment component includes a rear cover, a mounting seat, a support column and an electric cylinder. The first servo motor is fixedly installed at the upper end of the mounting seat. The lower end of the mounting seat is movably connected to the movable rod of the electric cylinder. The electric cylinder is movably connected to the inner wall of the support column.

[0010] Preferably, the collecting mechanism includes a fan group, a bottom basin, a receiving bin, side plates, a hollow table, a dial and an inclined ring. The mounting seat is movably connected to the opening at the edge of the bottom basin. The support column is fixedly connected to the lower side of the opening at the edge of the bottom basin.

[0011] Preferably, two groups of the fan groups are fixedly installed at the air inlets at both ends of the bottom basin. The inclined ring is fixedly connected to the bottom of the inner cavity of the bottom basin. The receiving bin is fixedly connected to the middle of the bottom basin. There is a gap between the receiving bin and the inclined ring.

[0012] Preferably, multiple groups of the side plates are annularly arrayed and fixedly connected to the upper part of the inner wall of the material receiving bin. Multiple groups of the baffle plates are fixedly connected to the outer ring surface of the hollow table. The baffle plates are slidably connected to the bottom of the inner cavity of the material receiving bin, and multiple discharging grooves are formed in the bottom of the inner cavity of the material receiving bin.

[0013] Preferably, the hollow table is located inside the material receiving bin. The upper edge of the hollow table is flush with the upper edge of the side plate. The hollow table is fixedly connected to the lower end of the stepped shaft. The power assembly includes a column tube, a connecting rod, a spiral blade, and a motor box. The lower end of the stepped shaft is fixedly connected to the output shaft of the motor box, and the lower side of the hollow table is slidably connected to the upper side of the motor box.

[0014] Preferably, the spiral blade is fixedly installed at the upper end of the stepped shaft and is located above the conical roller. The column tube is located outside the spiral blade and is fixedly connected to the upper end of the conical shell. The conical shell is fixedly connected to the inner wall of the support shell through multiple groups of the connecting rods. The column tube is fixedly communicated with the lower port of the hopper, and the hopper is fixedly installed on the upper side of the support shell.

[0015] Preferably, the classification and weighing mechanism includes a hose, a storage cylinder, a primary sieve assembly, a secondary sieve assembly, a tertiary sieve assembly, a counterweight, a connecting rod, a second servo motor, a short plate, a spring, a base, and a connecting ring. The hose is fixedly connected to the lower side of the opening of the bottom basin and is fixedly communicated with the storage cylinder. The primary sieve assembly, the secondary sieve assembly, and the tertiary sieve assembly have the same structure and are sequentially fixedly connected to the inner wall of the storage cylinder. The storage cylinder is fixedly installed on the upper side of the connecting ring. Multiple groups of short plates are movably connected to the middle opening of the connecting ring. The second servo motor is simultaneously movably connected to the other end of the short plate. The connecting rod is fixedly installed on the output shaft of the second servo motor, and the counterweight is fixedly installed on the other end of the connecting rod. The connecting ring is fixedly connected to the base through multiple groups of the springs.

[0016] Preferably, the primary sieve assembly includes a sieve plate, a weighing sensor, a connecting block, and an output pipe. Multiple groups of the weighing sensors are evenly installed on the lower side edge of the sieve plate. The weighing sensors are fixedly installed on the upper side of the connecting block. The connecting block is fixedly connected to the inner wall of the storage cylinder. The output pipe is fixedly communicated with the outer ring surface of the storage cylinder, and the lower side height of the output pipe is lower than that of the sieve plate.

[0017] A control system for a raw material crushing device for preparing coal-saving denitration agent, which includes a weighing module and a feedback module. The weighing module includes a weighing unit, a first microprocessor, a signal conditioning circuit, and a data storage unit. The feedback module includes a data acquisition unit, a feedback control unit, and a communication unit;

[0018] The weighing unit measures the weights of raw material particles in the primary sieve assembly, the secondary sieve assembly, and the tertiary sieve assembly respectively at the same moment by means of multiple groups of the weighing sensors;

[0019] The microprocessor is responsible for receiving the processed signals and performing data calculation, storage, and control operations;

[0020] The signal conditioning circuit is used to amplify, filter, and perform analog-to-digital conversion processing on the weak electrical signals output by the weighing unit;

[0021] The data storage unit is used to store weighing data for subsequent query, statistics, and analysis;

[0022] The data acquisition unit is connected to the microprocessor, acquires weighing data and status information, and transmits the acquired data to the feedback control unit;

[0023] The feedback control unit is composed of a second microprocessor, responsible for receiving data from the data acquisition unit and making judgments according to a preset threshold. The preset threshold is the weight ratio of raw material particles in the primary sieve assembly, the secondary sieve assembly, and the tertiary sieve assembly. According to the judgment results, it controls the operating states of the electric cylinder and the first servo motor respectively;

[0024] If the weight ratio in the primary sieve assembly is too large, control the electric cylinder to extend, reduce the distance between the grinding ring and the conical table, and increase the rotation speed of the first servo motor;

[0025] If the weight ratio in the primary sieve assembly is normal, maintain the states of the electric cylinder and the first servo motor;

[0026] If the weight ratio in the tertiary sieve assembly is too large, control the electric cylinder to contract, increase the distance between the grinding ring and the conical table, and slow down the rotation speed of the first servo motor;

[0027] Including but not limited to the above situations, corresponding response measures are also formulated for other ratio situations.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. In the present invention, the raw materials of the coal-saving denitrification agent are crushed for the first time by the rotation of the conical roller and with the cooperation of the conical shell. The crushed particles slide along the outer wall of the conical roller onto the conical table. Multiple groups of rolling rings apply downward pressure to the crushed particles, generating friction in the opposite direction of their movement, crushing the crushed particles to achieve secondary crushing and improve the crushing quality. The weighing sensors in the first-stage screen assembly, the second-stage screen assembly and the third-stage screen assembly respectively measure the weight of the raw material particles in the three at the same time. The feedback control unit judges the collected data according to a preset threshold, and controls the operating status of the electric cylinder and the first servo motor according to the judgment result, thereby controlling the second crushing, improving the uniformity of the raw material particles, and maximizing the quality and performance of the coal-saving denitrification agent.

[0030] 2. In the present invention, the particles that have undergone secondary crushing continue to slide down the small-angle slope of the conical table to the bottom cavity of the receiving bin. While the stepped shaft rotates, it will drive the hollow table and multiple sets of paddles on its periphery to rotate, pushing the secondary crushed particles to fall from the discharge chute to the inclined surface of the inclined ring. The fan groups at both ends of the bottom basin help the particles on the inclined ring to roll to the lower point and enter the hose, avoiding splashing of the crushed particles and improving the collection effect.

[0031] 3. In the present invention, the aperture of the sieve plate in the first-stage sieve assembly is the largest, followed by that in the second-stage sieve assembly, and the sieve plate in the third-stage sieve assembly has no sieve aperture. By controlling the start-up of the second servo motor, the second servo motor drives the connecting rod to rotate, thereby driving the counterweight block to perform circular motion, and the connecting ring forms a vibration seat with the base through multiple sets of springs, so that the storage barrel and the first-stage sieve assembly, the second-stage sieve assembly and the third-stage sieve assembly inside it vibrate. After the secondary crushing, the particles are layered on the three and transported outward through their respective output pipes. Different operations are performed according to the size of the particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the three-dimensional structure of a raw material crushing device for preparing a coal-saving denitrification agent according to the present invention;

[0033] Figure 2 This is a schematic diagram of a partial three-dimensional structure of a raw material crushing device for preparing a coal-saving denitrification agent according to the present invention;

[0034] Figure 3 A partial top view of a raw material crushing device for preparing a coal-saving denitrification agent according to the present invention;

[0035] Figure 4 This is a schematic diagram of the three-dimensional structure of a cone crushing mechanism in a raw material crushing device for preparing a coal-saving denitrification agent according to the present invention;

[0036] Figure 5 This is a schematic diagram of the three-dimensional structure inside the bottom basin of a raw material crushing device for preparing a coal-saving denitrification agent according to the present invention;

[0037] Figure 6 This is a three-dimensional structural schematic diagram of the decomposition of both the aggregate mechanism and the conical crushing mechanism in the raw material crushing equipment for preparing a coal-saving denitration agent according to the present invention;

[0038] Figure 7 This is a three-dimensional structural schematic diagram of the classification and weighing mechanism in the raw material crushing equipment for preparing a coal-saving denitration agent according to the present invention;

[0039] Figure 8 This is a three-dimensional structural schematic diagram of the side rolling mechanism in the raw material crushing equipment for preparing a coal-saving denitration agent according to the present invention;

[0040] Figure 9 This is a three-dimensional structural schematic diagram of partial decomposition of the side rolling mechanism in the raw material crushing equipment for preparing a coal-saving denitration agent according to the present invention;

[0041] Figure 10 This is an operating state diagram of the raw material crushing equipment for preparing a coal-saving denitration agent according to the present invention.

[0042] In the figure: 1, hopper; 2, support shell; 3, side rolling mechanism; 31, rolling ring; 32, rear cover; 33, mounting seat; 34, support column; 35, electric cylinder; 36, connecting platform; 37, socket; 38, connecting cover; 39, connecting plate; 310, first servo motor; 4, aggregate mechanism; 41, fan group; 42, bottom basin; 43, receiving bin; 44, side plate; 45, hollow platform; 46, baffle; 47, blanking chute; 48, inclined ring; 5, classification and weighing mechanism; 51, hose; 52, storage cylinder; 53, primary sieve assembly; 531, sieve plate; 532, weighing sensor; 533, connecting block; 534, output pipe; 54, secondary sieve assembly; 55, tertiary sieve assembly; 56, counterweight; 57, connecting rod; 58, second servo motor; 59, short board; 510, spring; 511, base; 512, connecting ring; 6, conical crushing mechanism; 61, column tube; 62, conical shell; 63, connecting rod; 64, spiral blade; 65, conical roller; 66, conical platform; 67, stepped shaft; 68, motor box. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] Example 1: Refer to Figure 1 - Figure 10As shown: A raw material crushing device for preparing a coal-saving denitration agent, including a hopper 1 and a support shell 2. A collecting mechanism 4 is fixedly connected to the lower side of the support shell 2. A plurality of side rolling mechanisms 3 are distributed around the edge position of the collecting mechanism 4. A conical crushing mechanism 6 is movably connected to the middle of the collecting mechanism 4. The plurality of side rolling mechanisms 3 are located outside the conical crushing mechanism 6. A classification and weighing mechanism 5 is fixedly communicated with the lower side of the collecting mechanism 4. The conical crushing mechanism 6 is used for the first crushing of the raw materials of the coal-saving denitration agent. The side rolling mechanism 3 and the conical crushing mechanism 6 cooperate to perform the second crushing. The collecting mechanism 4 is used for gathering the crushed raw materials of the coal-saving denitration agent and conveying them to the classification and weighing mechanism 5. The classification and weighing mechanism 5 is used for classification and weighing. The conical crushing mechanism 6 includes a conical shell 62, a conical roller 65, a conical platform 66, a stepped shaft 67 and a power assembly. The conical shell 62 is located outside the conical roller 65. The conical roller 65 and the conical platform 66 are coaxially installed through the stepped shaft 67. The middle of the conical platform 66 protrudes upward. The power assembly includes a column tube 61, a connecting rod 63, a spiral blade 64 and a motor box 68. The lower end of the stepped shaft 67 is fixedly connected to the output shaft of the motor box 68. The lower side of the hollow platform 45 is slidably connected to the upper side of the motor box 68. The spiral blade 64 is fixedly installed at the upper end of the stepped shaft 67 and is located above the conical roller 65. The column tube 61 is located outside the spiral blade 64 and is fixedly connected to the upper end of the conical shell 62. The conical shell 62 is fixedly connected to the inner wall of the support shell 2 through a plurality of connecting rods 63. The column tube 61 is fixedly communicated with the lower port of the hopper 1. The hopper 1 is fixedly installed on the upper side of the support shell 2;

[0045] The side rolling mechanism 3 includes a rolling assembly and an angle adjustment assembly. The rolling assembly includes a rolling ring 31, a connecting platform 36, a socket 37, a connecting cover 38, a connecting disc 39 and a first servo motor 310. The rolling ring 31 is fixedly installed outside the connecting platform 36. The connecting platform 36 is rotatably installed outside the socket 37 and the first servo motor 310 through a bearing. The socket 37 is fixedly connected to the end of the first servo motor 310. The connecting disc 39 passes through the middle of the socket 37 and is fixedly connected to the output shaft of the first servo motor 310 through a coupling. The connecting cover 38 installs the rolling ring 31 on one side of the connecting disc 39 through bolts. The angle adjustment assembly is used to control the distance between the rolling ring 31 and the conical platform 66. The angle adjustment assembly includes a rear cover 32, a mounting seat 33, a support column 34 and an electric cylinder 35. The first servo motor 310 is fixedly installed at the upper end of the mounting seat 33. The lower end of the mounting seat 33 is movably connected to the movable rod of the electric cylinder 35. The electric cylinder 35 is movably connected to the inner wall of the support column 34. The mounting seat 33 is movably connected to the edge opening of the bottom basin 42. The support column 34 is fixedly connected to the lower side of the edge opening of the bottom basin 42.

[0046] A control system for a raw material crushing device used in the preparation of a coal-saving denitration agent, which includes a weighing module and a feedback module. The weighing module includes a weighing unit, a first microprocessor, a signal conditioning circuit, and a data storage unit. The feedback module includes a data acquisition unit, a feedback control unit, and a communication unit;

[0047] The weighing unit measures the weights of raw material particles in the primary sieve assembly 53, the secondary sieve assembly 54, and the tertiary sieve assembly 55 respectively at the same moment by means of multiple groups of weighing sensors 532. The microprocessor is responsible for receiving the processed signals and performing data calculation, storage, and control operations. The signal conditioning circuit is used to amplify, filter, and perform analog-to-digital conversion on the weak electrical signals output by the weighing unit. Specifically, the amplifier circuit can enhance the weak signals output by the sensor to an amplitude suitable for subsequent processing. The filter circuit removes the noise interference in the signals and improves the signal quality. The analog-to-digital conversion circuit converts the analog signals into digital signals so that the first microprocessor can process them. The data storage unit is used to store the weighing data for subsequent query, statistics, and analysis. The data acquisition unit is connected to the microprocessor, acquires the weighing data and status information, and transmits the acquired data to the feedback control unit, and the data of the unit, and makes a judgment according to the preset threshold. The preset threshold is the weight ratio of the raw material particles in the primary sieve assembly 53, the secondary sieve assembly 54, and the tertiary sieve assembly 55. According to the judgment result, the operating states of the electric cylinder 35 and the first servo motor 310 are controlled respectively.

[0048] In this embodiment, the control motor box 68 is started, and the motor box 68 drives the stepped shaft 67 to rotate, thereby driving the spiral blade 64, the conical roller 65, and the conical table 66 to rotate simultaneously. The spiral blade 64 rotates inside the column tube 61 and conveys the raw material particles downward into the conical shell 62. Under the rotation of the conical roller 65, the raw material particles are crushed for the first time. The crushed particles slide down along the outer wall of the conical roller 65 onto the conical table 66. The slope angle of the conical table 66 becomes gentler from top to bottom, slowing down the sliding speed of the crushed particles and increasing the staying time of the crushed particles on the conical table 66. Synchronously control the first servo motor 310 to start. The output shaft of the first servo motor 310 drives the connecting disk 39 to rotate, and the rolling ring 31 and the connecting cover 38 are fixed on the connecting disk 39 by bolts, thereby driving the rolling ring 31 to rotate. The rolling ring 31 is installed outside the connecting table 36, and the connecting table 36 is movably connected to the outside of the first servo motor 310 and the socket 37 through bearings to ensure the stable rotation of the rolling ring 31. Multiple groups of rolling rings 31 rotate simultaneously and the rotation direction at the position closest to the conical table 66 is opposite to the rotation direction of the conical table 66, such as Figure 10As shown, when the frustum 66 drives the crushed particles to move in a counterclockwise circular motion, multiple sets of grinding rings 31 apply a downward pressure to the crushed particles, generating a frictional force opposite to their movement direction, rolling the crushed particles, achieving secondary crushing, improving the crushing quality. The particles after secondary crushing enter the classification and weighing mechanism 5 through the aggregate mechanism 4;

[0049] The weighing sensors 532 in the primary sieve assembly 53, secondary sieve assembly 54, and tertiary sieve assembly 55 respectively measure the weights of the raw material particles in the three assemblies at the same moment under the command of the control system. The signal conditioning circuit amplifies, filters, and performs analog-to-digital conversion on the weak electrical signals, and transmits them to the first microprocessor. The data acquisition unit in the feedback module acquires the weighing data and status information and transmits them to the feedback control unit. Based on the second microprocessor and according to the preset threshold, it judges the acquired data. If the weight ratio in the primary sieve assembly 53 is too large, it controls the electric cylinder 35 to extend, adjusts the distance between the grinding ring 31 and the frustum 66, and increases the rotation speed of the first servo motor 310 to increase the downward pressure, thereby further crushing; if the weight ratio in the primary sieve assembly 53 is normal, it maintains the state of the electric cylinder 35 and the first servo motor 310; if the weight ratio in the tertiary sieve assembly 55 is too large, it controls the electric cylinder 35 to contract, expands the distance between the grinding ring 31 and the frustum 66, and slows down the rotation speed of the first servo motor 310 to reduce the downward pressure, avoiding excessive crushing, thereby improving the uniformity of the raw material particles and ensuring the quality and performance of the coal-saving denitration agent to the greatest extent.

[0050] Embodiment 2: According to Figure 1 - Figure 6 As shown, the aggregate mechanism 4 includes a fan group 41, a bottom basin 42, a material receiving bin 43, side plates 44, a hollow table 45, a baffle 46, and an inclined ring 48. Two groups of fan groups 41 are fixedly installed at both ends of the air ducts of the bottom basin 42. The inclined ring 48 is fixedly connected to the bottom of the inner cavity of the bottom basin 42. The material receiving bin 43 is fixedly connected to the middle of the bottom basin 42. There is a gap between the material receiving bin 43 and the inclined ring 48. Multiple groups of side plates 44 are annularly arrayed and fixedly connected to the upper part of the inner wall of the material receiving bin 43. Multiple groups of baffles 46 are fixedly connected to the outer ring surface of the hollow table 45. The baffle 46 is slidably connected to the bottom of the inner cavity of the material receiving bin 43. Multiple discharge slots 47 are formed in the bottom of the inner cavity of the material receiving bin 43. The hollow table 45 is located inside the material receiving bin 43. The upper edge of the hollow table 45 is flush with the upper edge of the side plate 44. The hollow table 45 is fixedly connected to the lower end of the stepped shaft 67.

[0051] In this embodiment, the particles after secondary crushing continue to slide down along the small-angle slope surface of the conical platform 66. Under the action of the inclined side plate 44, they slide into the bottom cavity of the material receiving bin 43. While the stepped shaft 67 rotates, it will drive the hollow platform 45 and multiple groups of paddle plates 46 around it to rotate. The paddle plates 46 contact the bottom cavity of the material receiving bin 43, and push the particles after secondary crushing to fall from the feeding chute 47 onto the inclined surface of the inclined ring 48. The fan group 41 at one end of the bottom basin 42 blows air into the bottom basin 42 through the through hole, and the fan group 41 at the other end of the bottom basin 42 exhausts air outwards through the through hole of the bottom basin 42, helping the particles on the inclined ring 48 to roll towards the low point and enter the hose 51. The aggregate mechanism 4 surrounds the outside of the conical platform 66, preventing the crushed particles from splashing outwards and improving the collection effect.

[0052] Embodiment 3: According to Figure 1 , Figure 2 , Figure 5 and Figure 7 shown, the classification and weighing mechanism 5 includes a hose 51, a storage cylinder 52, a primary sieve assembly 53, a secondary sieve assembly 54, a tertiary sieve assembly 55, a counterweight 56, a connecting rod 57, a second servo motor 58, a short plate 59, a spring 510, a base 511 and a connecting ring 512. The hose 51 is fixedly connected to the lower side of the opening of the bottom basin 42, and the hose 51 is fixedly communicated with the storage cylinder 52. The primary sieve assembly 53, the secondary sieve assembly 54 and the tertiary sieve assembly 55 have the same structure and are fixedly connected to the inner wall of the storage cylinder 52 in sequence. The storage cylinder 52 is fixedly installed on the upper side of the connecting ring 512. Multiple groups of short plates 59 are movably connected to the middle opening of the connecting ring 512. The second servo motor 58 is simultaneously movably connected to the other end of the short plate 59. The connecting rod 57 is fixedly installed on the output shaft of the second servo motor 58. The counterweight 56 is fixedly installed on the other end of the connecting rod 57. The connecting ring 512 is fixedly connected to the base 511 through multiple groups of springs 510. The primary sieve assembly 53 includes a sieve plate 531, a weighing sensor 532, a connecting block 533 and an output pipe 534. Multiple groups of weighing sensors 532 are uniformly installed on the lower side edge of the sieve plate 531. The weighing sensor 532 is fixedly installed on the upper side of the connecting block 533. The connecting block 533 is fixedly connected to the inner wall of the storage cylinder 52. The output pipe 534 is fixedly communicated with the outer ring surface of the storage cylinder 52. The lower side height of the output pipe 534 is lower than that of the sieve plate 531.

[0053] In this embodiment, the particles after secondary crushing fall directly from the hose 51 onto the sieve plate 531 of the primary screen assembly 53. The primary screen assembly 53, the secondary screen assembly 54, and the tertiary screen assembly 55 have the same structure. The aperture of the sieve plate 531 in the primary screen assembly 53 is the largest, the aperture of the secondary screen assembly 54 is the second largest, and the sieve plate 531 in the tertiary screen assembly 55 has no sieve aperture. By controlling the second servo motor 58 to start, the second servo motor 58 drives the connecting rod 57 to rotate, thereby driving the counterweight block 56 to perform circular motion. The connecting ring 512 forms a vibration seat with the base 511 through multiple sets of springs 510, causing the storage barrel 52 and the primary screen assembly 53, the secondary screen assembly 54, and the tertiary screen assembly 55 inside to vibrate. The particles after secondary crushing are layered on the three sieves and transported outward through their respective output pipes 534. The larger particles are crushed again, and the particles that meet the requirements are stored. The weighing sensors 532 in the three sieves measure the weight of the raw materials in the three sieves at the same time. The vibration amplitude is small, and a certain error is allowed for the measurement, which does not affect the measured value.

[0054] The method of use and working principle of this device are as follows: the raw material particles of the coal-saving denitrification agent to be crushed are introduced into the hopper 1, the motor box 68 drives the stepped shaft 67 to rotate, thereby driving the spiral blade 64, the conical roller 65 and the conical table 66 to rotate simultaneously, the spiral blade 64 rotates inside the column tube 61, and the raw material particles are transported to the conical shell 62 below. Under the rotation of the conical roller 65, the raw material particles are crushed for the first time, and the crushed particles slide onto the conical table 66;

[0055] The first servo motor 310 is synchronously controlled to start, and the output shaft of the first servo motor 310 drives the connecting plate 39 to rotate, thereby driving the multiple sets of rolling rings 31 to rotate simultaneously. The rotation direction of the position closest to the conical platform 66 is opposite to the rotation direction of the conical platform 66. Therefore, when the conical platform 66 drives the crushed particles to make a counterclockwise circular motion, the multiple sets of rolling rings 31 exert downward pressure on the crushed particles, generating a friction force opposite to the direction of its movement, crushing the crushed particles and achieving secondary crushing.

[0056] The secondary crushed particles continue to slide down the small-angle slope of the conical platform 66 to the bottom cavity of the receiving bin 43. The rotation of the stepped shaft 67 drives the hollow platform 45 and the multiple sets of paddles 46 around it to rotate, pushing the secondary crushed particles from the discharge chute 47 to fall onto the inclined surface of the inclined ring 48. The fan groups 41 at both ends of the bottom basin 42 help the particles on the inclined ring 48 to roll to the lower point and enter the hose 51.

[0057] The particles after secondary crushing directly fall on the sieve plate 531 of the primary sieve assembly 53. The primary sieve assembly 53, the secondary sieve assembly 54, and the tertiary sieve assembly 55 have the same structure. The aperture of the sieve plate 531 in the primary sieve assembly 53 is the largest, followed by that in the secondary sieve assembly 54, and the sieve plate 531 in the tertiary sieve assembly 55 has no sieve holes. Thus, the particles after secondary crushing are stratified among the three assemblies.

[0058] The weighing sensors 532 in the primary sieve assembly 53, the secondary sieve assembly 54, and the tertiary sieve assembly 55 respectively measure the weights of the raw material particles in the three assemblies at the same moment under the instruction of the control system. The signal conditioning circuit amplifies, filters, and performs analog-to-digital conversion on the weak electrical signals, and then transports them to the first microprocessor. The data acquisition unit in the feedback module acquires the weighing data and status information and transmits them to the feedback control unit. Based on the second microprocessor and according to the preset threshold, the feedback control unit judges the acquired data and controls the operating states of the electric cylinder 35 and the first servo motor 310 respectively according to the judgment results, so as to control the secondary crushing.

[0059] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A raw material crushing device for preparing a coal-saving denitration agent, comprising a hopper (1) and a support shell (2), characterized in that: A material collecting mechanism (4) is fixedly connected to the lower side of the support shell (2). A plurality of side rolling mechanisms (3) are distributed around the edge of the material collecting mechanism (4). A conical crushing mechanism (6) is movably connected to the middle of the material collecting mechanism (4). The plurality of side rolling mechanisms (3) are located outside the conical crushing mechanism (6). A sorting and weighing mechanism (5) is fixedly communicated with the lower side of the material collecting mechanism (4). The conical crushing mechanism (6) is used for the first crushing of the raw material of the coal-saving denitration agent. The side rolling mechanism (3) and the conical crushing mechanism (6) cooperate for the second crushing. The material collecting mechanism (4) is used for gathering the crushed raw material of the coal-saving denitration agent and conveying it to the sorting and weighing mechanism (5). The sorting and weighing mechanism (5) is used for sorting and weighing. The conical crushing mechanism (6) includes a conical shell (62), a conical roller (65), a conical platform (66), a stepped shaft (67) and a power assembly. The conical shell (62) is located outside the conical roller (65). The conical roller (65) and the conical platform (66) are coaxially installed through the stepped shaft (67). The middle of the conical platform (66) protrudes upward. The side rolling mechanism (3) includes a rolling assembly and an angle adjusting assembly. The rolling assembly includes a rolling ring (31), a connecting platform (36), a socket (37), a connecting cover (38), a connecting disc (39) and a first servo motor (310). The rolling ring (31) is fixedly installed outside the connecting platform (36). The connecting platform (36) is rotatably installed outside the socket (37) and the first servo motor (310) through a bearing. The socket (37) is fixedly connected to the end of the first servo motor (310). The connecting disc (39) passes through the middle of the socket (37) and is fixedly connected to the output shaft of the first servo motor (310) through a coupling. The connecting cover (38) installs the rolling ring (31) on one side of the connecting disc (39) through bolts. The angle adjusting assembly is used to control the distance between the rolling ring (31) and the conical platform (66).

2. The raw material crushing equipment for preparing coal-saving denitration agent according to claim 1, characterized in that: The angle adjusting assembly includes a rear cover (32), a mounting seat (33), a support column (34) and an electric cylinder (35). The first servo motor (310) is fixedly installed at the upper end of the mounting seat (33). The lower end of the mounting seat (33) is movably connected to the movable rod of the electric cylinder (35). The electric cylinder (35) is movably connected to the inner wall of the support column (34).

3. The raw material crushing equipment for preparing coal-saving denitration agent according to claim 2, characterized in that: The material collecting mechanism (4) includes a fan group (41), a bottom basin (42), a material receiving bin (43), side plates (44), a hollow platform (45), a baffle (46) and an inclined ring (48). The mounting seat (33) is movably connected to the edge opening of the bottom basin (42). The support column (34) is fixedly connected to the lower side of the edge opening of the bottom basin (42).

4. A raw material crushing device for preparing a coal-saving denitration agent according to claim 3, characterized in that: Two groups of the fan groups (41) are fixedly installed at both ends of the air ducts of the bottom basin (42), the inclined ring (48) is fixedly connected to the bottom of the inner cavity of the bottom basin (42), the material receiving bin (43) is fixedly connected to the middle of the bottom basin (42), and there is a gap between the material receiving bin (43) and the inclined ring (48).

5. A raw material crushing device for preparing a coal-saving denitration agent according to claim 4, characterized in that: Multiple groups of the side plates (44) are distributed in an annular array and fixedly connected to the upper part of the inner wall of the material receiving bin (43), multiple groups of the baffle plates (46) are fixedly connected to the outer ring surface of the hollow table (45), the baffle plates (46) are slidably connected to the bottom of the inner cavity of the material receiving bin (43), and multiple groups of blanking grooves (47) are formed in the bottom of the inner cavity of the material receiving bin (43).

6. A raw material crushing device for preparing a coal-saving denitration agent according to claim 5, characterized in that: The hollow table (45) is located inside the material receiving bin (43), the upper edge of the hollow table (45) is flush with the upper edge of the side plate (44), the hollow table (45) is fixedly connected to the lower end of the stepped shaft (67), the power assembly includes a column tube (61), a connecting rod (63), a spiral blade (64) and a motor box (68), the lower end of the stepped shaft (67) is fixedly connected to the output shaft of the motor box (68), and the lower side of the hollow table (45) is slidably connected to the upper side of the motor box (68).

7. A raw material crushing device for preparing a coal-saving denitration agent according to claim 6, characterized in that: The spiral blade (64) is fixedly installed at the upper end of the stepped shaft (67) and is located above the conical roller (65), the column tube (61) is located outside the spiral blade (64) and is fixedly connected to the upper end of the conical shell (62), the conical shell (62) is fixedly connected to the inner wall of the support shell (2) through multiple groups of the connecting rods (63), the column tube (61) is fixedly communicated with the lower port of the hopper (1), and the hopper (1) is fixedly installed on the upper side of the support shell (2).

8. A raw material crushing device for preparing a coal-saving denitration agent according to claim 7, characterized in that: The classification and weighing mechanism (5) includes a hose (51), a storage cylinder (52), a primary screening assembly (53), a secondary screening assembly (54), a tertiary screening assembly (55), a counterweight (56), a connecting rod (57), a second servo motor (58), a short plate (59), a spring (510), a base (511) and a connecting ring (512), the hose (51) is fixedly connected to the lower side of the opening of the bottom basin (42), the hose (51) is fixedly communicated with the storage cylinder (52), the primary screening assembly (53), the secondary screening assembly (54) and the tertiary screening assembly (55) have the same structure and are sequentially fixedly connected to the inner wall of the storage cylinder (52), the storage cylinder (52) is fixedly installed on the upper side of the connecting ring (512), multiple groups of short plates (59) are movably connected to the middle opening of the connecting ring (512), the second servo motor (58) is simultaneously movably connected to the other end of the short plate (59), the connecting rod (57) is fixedly installed on the output shaft of the second servo motor (58), the counterweight (56) is fixedly installed on the other end of the connecting rod (57), and the connecting ring (512) is fixedly connected to the base (511) through multiple groups of the springs (510).

9. The raw material crushing equipment for preparing coal-saving denitration agent according to claim 8, characterized in that: The primary screening assembly (53) includes a sieve plate (531), a weighing sensor (532), a connecting block (533), and an output pipe (534). Multiple groups of the weighing sensors (532) are evenly installed on the lower side edge of the sieve plate (531). The weighing sensor (532) is fixedly installed on the upper side of the connecting block (533). The connecting block (533) is fixedly connected to the inner wall of the storage bin (52). The output pipe (534) is fixedly communicated with the outer ring surface of the storage bin (52). The lower side height of the output pipe (534) is lower than that of the sieve plate (531).

10. A control system for a raw material crushing device used in the preparation of a coal-saving denitration agent, characterized in that, An apparatus for crushing raw materials for preparing a coal-saving denitration agent uses any one of the raw material crushing apparatuses described in claims 1-9 above, and includes a weighing module and a feedback module. The weighing module includes a weighing unit, a first microprocessor, a signal conditioning circuit, and a data storage unit. The feedback module includes a data acquisition unit, a feedback control unit, and a communication unit; The weighing unit measures the weights of raw material particles in the primary screening assembly (53), the secondary screening assembly (54), and the tertiary screening assembly (55) respectively at the same moment by means of multiple groups of the weighing sensors (532); The microprocessor is responsible for receiving the processed signals and performing data calculation, storage, and control operations; The signal conditioning circuit is used to amplify, filter, and perform analog-to-digital conversion on the weak electrical signals output by the weighing unit; The data storage unit is used to store weighing data for subsequent query, statistics, and analysis; The data acquisition unit is connected to the microprocessor, acquires weighing data and status information, and transmits the acquired data to the feedback control unit; The feedback control unit is composed of a second microprocessor, is responsible for receiving the data from the data acquisition unit, and making a judgment according to a preset threshold. The preset threshold is the weight ratio of raw material particles in the primary screening assembly (53), the secondary screening assembly (54), and the tertiary screening assembly (55). According to the judgment result, the operating states of the electric cylinder (35) and the first servo motor (310) are controlled respectively.

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