Cement powder supersonic classification and refinement device and refinement method thereof

Abstract

The application discloses a cement powder supersonic grading and refining device and a refining method thereof, relates to the technical field of refining and crushing, and comprises a barrel body, a nozzle and a grading wheel unit are installed on the barrel body, a circular-arc pipe is correspondingly and symmetrically installed outside the barrel body, one end of the circular-arc pipe is assembled with a blocking flange plate to realize sealing, a drainage assembly is installed at the other end of the circular-arc pipe, a pressure sensing assembly is installed at the top of the drainage assembly, the pressure sensing assembly is used for converting the air pressure difference in the symmetric circular-arc pipes into a stroke difference, and a stop component and a linkage component are installed on the pressure sensing assembly. The circular-arc pipe, the blocking flange plate and the drainage assembly are used in cooperation, the blocking flange plate can block and separate the two ends of the two circular-arc pipes, the two circular-arc pipes are symmetrically and independently supplied with air by the nozzles in the barrel body, when the nozzles are blocked, the pressure sensing assembly converts the air pressure difference into a stroke displacement difference, so that the position of the blocked nozzle can be determined.

Description

Technical Field

[0001] This invention relates to the field of fine powdering technology, and in particular to a supersonic classifying and refining device for cement powder and its refining method. Background Technology

[0002] Supersonic classification and refinement of cement powder is a technology that uses supersonic airflow to efficiently crush and finely classify cement powder. Its core principle is to accelerate compressed air or superheated steam to supersonic speed through a Laval nozzle, carrying cement particles in the high-speed airflow to generate violent collisions, shearing and friction, thereby achieving particle refinement and classification.

[0003] When multiple sets of Laval nozzles accelerate high-pressure gas to a supersonic jet and subject it to high-speed collision and shearing crushing inside the crushing chamber, the particle size of the finished product is controlled by adjusting the rotation speed of the classifying wheel at the top of the crushing chamber, achieving ultrafine crushing of cement powder. When supplying air to the multiple sets of Laval nozzles, constant-pressure gas is typically injected into a drain annular pipe. This drain annular pipe supplies air to the Laval nozzles through pipelines. Using a constant-pressure air supply method ensures that the jet flow rate of the remaining Laval nozzles can be maintained even if one or more nozzles become clogged. Furthermore, real-time monitoring of the gas pressure and flow rate from the air supply source allows for the determination of whether any Laval nozzles are clogged. However, when Laval nozzles become clogged, and supersonic pulverization relies on a symmetrical high-speed airflow field formed by multiple Laval nozzles, the symmetry is disrupted when one Laval nozzle becomes clogged. Since multiple Laval nozzles use a unified exhaust annular pipe for air supply, the air pressure inside the exhaust annular pipe remains constant compared to the air pressure of the supply source. Therefore, directly detecting the air pressure inside the exhaust annular pipe cannot help pinpoint the location of the clogged Laval nozzle, nor is it convenient to regulate the air pressure inside the exhaust annular pipe to reduce the asymmetric impact of nozzle clogging on the airflow. Therefore, a supersonic classification and refining device for cement powder and its refining method are designed to solve or alleviate the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a supersonic classification and refining device for cement powder and a refining method thereof, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cement powder supersonic classification and refining device, comprising: A barrel body, on which a nozzle and a grading wheel unit are mounted; An arc-shaped tube is installed symmetrically on the outside of the barrel, corresponding to the nozzle. One end of the arc-shaped tube is fitted with a sealing flange plate to achieve a seal. A drainage assembly, wherein the drainage assembly is installed at the other end of the arc-shaped pipe; A pressure-sensing component is installed on top of the exhaust component. The pressure-sensing component is used to convert the air pressure difference inside the symmetrical arc tube into a stroke difference. A stop component and a linkage component are installed on the pressure-sensing component. When the stroke difference converted by the pressure-sensing component is greater than the preset value of the stop component, the linkage adjustment mechanism is automatically triggered to adjust the distribution ratio of the airflow delivered by the exhaust component.

[0006] Preferably, the drainage assembly includes: A tee connector, wherein the tee connector is assembled at the other end of the arc-shaped pipe; The mounting shaft is vertically installed inside the tee connector; The drain component is fixedly installed inside the mounting shaft. The drain component is used to regulate the flow of gas entering the tee connector. The drain component is designed to be force-balanced on its sides. When the linkage adjustment mechanism is not triggered, the stop component limits the flow of gas in the center.

[0007] Preferably, the pressure-sensing component includes: The mounting housing is fixedly installed on the top of the tee connector; The cylinder is horizontally assembled inside the mounting housing, and each end of the inner cavity of the cylinder is equipped with a compressed air bladder. A vent pipe is assembled between the mounting housing and the arc-shaped tube. The vent pipe connects the inner cavity of the arc-shaped tube with the inner cavity of the compression airbag. The compression airbag is used to convert the air pressure inside the arc-shaped tube into a stroke display.

[0008] Preferably, the pressure-sensing component further includes: Piston plate, the piston plate is installed inside the cylinder, and the difference in the distance that the piston plate moves driven by the compressed air bag inside the cylinder is the stroke difference; A connector, which is slidably sleeved on the outside of the cylinder; A connecting block is provided, wherein the outer wall of the cylinder is provided with a sliding hole corresponding to the connecting block, and the connecting block is fixedly connected between the connecting member and the piston plate, and the connecting block enables the connecting member and the piston plate to move synchronously in the same direction.

[0009] Preferably, the pressure-sensing component further includes: A guide rod, the axis of which is parallel to the axis of the cylinder, is fixedly installed inside the mounting housing; A limiting spring is slidably sleeved on the outside of the guide rod. The limiting spring is located between the connecting member and the stop member. The limiting spring is used to convert the forming difference into an elastic compression difference and transmit it to the stop member.

[0010] Preferably, the stop component includes: The mounting component is slidably sleeved on the outside of the cylinder. The end of the limiting spring is pressed against the mounting component. Under the action of the elastic compression difference of the limiting spring, the mounting component moves along the trajectory of the guide rod and drives the mounting shaft to rotate through the linkage component. A stop unit is disposed between the mounting component and the mounting housing, and the stop unit is used to lock and limit the mounting component within an overload threshold.

[0011] Preferably, the stop unit includes: A brake plate is fixedly installed on the inner wall of the mounting housing, and the side of the mounting component has a slot that mates with the brake plate. The locking post has an installation groove on one side of the inner wall of the slotted part. One end of the outer wall of the locking post is slidably sleeved with the inner cavity of the installation groove. The brake plate has a connecting groove on one side. The other end of the outer wall of the locking post is slidably engaged with the inside of the connecting groove. This limits the distance the mounting part moves, thereby limiting the maximum rotation angle of the drain part.

[0012] Preferably, the stop unit further includes: The ball head is rotatably embedded in the end of the locking pin, and the inner wall of the connecting groove is provided with an arc groove with a depth less than the radius of the ball head, and the ball head is slidably engaged in the interior of the arc groove; A stop spring is provided inside the mounting groove. The stop spring acts on the locking pin with a spring force toward the brake plate, so that the ball head and the brake plate form a locking mechanism within a preset value.

[0013] Preferably, the linkage component includes: A transmission component is fixedly installed on the top of a mounting shaft, and the top of the transmission component has an elongated mounting hole. A transmission rod is fixedly installed at the bottom of the mounting component. The outer wall of the transmission rod is slidably engaged with the inside of the mounting hole. The axis of the transmission rod is parallel to and offset from the axis of the mounting shaft. The mounting component drives the transmission rod to translate, so that the transmission rod moves within the mounting hole, thereby causing the transmission component to drive the mounting shaft to rotate.

[0014] Another objective of this invention is to provide a method for supersonic classification and refinement of cement powder, comprising the following specific steps: The vent pipe makes the air pressure inside the compression bladder the same as the air pressure inside the arc tube. The expansion of the compression bladder pushes the piston plate to move inside the cylinder. The piston plate drives the connecting parts to move synchronously through the connecting block. The connecting parts convert the stroke movement into elastic potential energy to squeeze the mounting parts through the limit spring. When there is a pressure difference in the arc pipe outside the barrel, that is, when there is nozzle blockage, the connecting parts on the side of the mounting part have a forming difference, that is, the elastic potential energy transmitted by the limiting spring of the connecting parts on the side of the mounting part has an elastic compression difference. When the elastic compression difference is greater than the overload threshold of the stop unit, the mounting part moves away from the side with nozzle blockage. The mounting part drives the drainage part to rotate through the linkage component to increase the gas flow of the arc pipe on the blocked side and compensate the airflow on the blocked side of the nozzle. After the machine stops, the compressed air bladder and connecting parts inside the cylinder are reset, and the mounting parts are centered and reset under the action of the limit spring, so that the mounting parts are centered and reset through the rotation of the linkage component and the discharge part.

[0015] The technical effects and advantages of this invention are as follows: (1) The present invention utilizes the use of arc tubes, sealing flange plates and drainage components. The sealing flange plates can seal and separate one end of the two arc tubes, so that the two arc tubes and the nozzles inside the barrel are symmetrically and independently supplied with air. When there is nozzle blockage, the pressure sensing component converts the air pressure difference into a stroke displacement difference to help determine the location of the nozzle blockage. (2) The present invention utilizes the combined use of pressure sensing component, stop component and linkage component. After the pressure sensing component converts the air pressure difference into a stroke difference, and the force transmitted to the stop component by the limit spring exceeds the stop threshold, the stop component drives the exhaust component to rotate through the linkage component to regulate the airflow entering the two arc tubes, increase the air pressure inside the arc tube on the blocked side, balance the airflow sprayed inside the barrel, reduce the influence of the asymmetric airflow inside the barrel, and after the nozzle inside the barrel flows, the pressure sensing component changes to stroke difference balance, and the stop component drives the exhaust component to rotate and reset through the linkage component, so that the exhaust component is in the normal airflow even distribution state. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of the present invention. Figure 2 This is a schematic diagram of the front structure of the arc-shaped tube of the present invention; Figure 3 This is a schematic diagram of the overall structure of the arc tube of the present invention; Figure 4 This is a schematic diagram of the internal structure of the arc-shaped tube from the top surface of the present invention; Figure 5 This is a top-view schematic diagram of the internal structure of the mounting housing of the present invention; Figure 6 This is a schematic diagram of the internal structure of the brake plate from the top surface of the present invention; Figure 7 This is a schematic diagram of the internal structure of the mounting housing of the present invention from the front. Figure 8 This is a schematic diagram of the overall structure of the drainage component of the present invention; Figure 9 This is a schematic diagram of the overall structure of the transmission component of the present invention.

[0017] In the attached diagram: 1. Barrel body; 2. Grading wheel unit; 3. Arc tube; 4. Sealing flange plate; 5. Drain assembly; 51. T-joint; 52. Mounting shaft; 53. Drain component; 6. Pressure sensing component; 61. Mounting housing; 62. Cylinder; 63. Piston plate; 64. Compression air bag; 65. Vent pipe; 66. Connecting component; 67. Connecting block; 68. Limiting spring; 69. Guide rod; 71. Mounting component; 72. Brake plate; 73. Locking pin; 74. Connecting groove; 75. Ball head; 76. Stop spring; 81. Transmission component; 82. Mounting hole; 83. Transmission rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides, for example Figures 1-9The supersonic classifying and refining device for cement powder shown includes a barrel 1, an arc-shaped pipe 3, a drainage component 5, and a pressure sensing component 6. Nozzles and a classifying wheel unit 2 are installed on the barrel 1. The device also includes an air supply system, a collection system, and a control system. The air supply system uses an air compressor as its core, compressing air to 0.6-1.2 MPa. The compressed air then undergoes oil, water, and dust removal treatment via a refrigerated dryer and a precision filter before entering a pressurized storage tank to provide a clean and stable high-pressure air source for subsequent pulverization. The nozzles are Laval nozzles, installed symmetrically on the side wall of the pulverizing barrel 1. There are four or six Laval nozzles. The pressure energy of the high-pressure gas is converted into kinetic energy, forming a supersonic jet with a speed exceeding 500 m / s. This jet accelerates and carries the material into the crushing chamber 1. The crushing chamber 1 serves as a sealed crushing space, allowing the supersonic airflow to carry cement particles through high-speed rotation. Crushing is achieved through intense collisions between particles and between particles and the wear-resistant inner wall. The classifying wheel unit 2 is installed at the top outlet of the crushing chamber 1. Driven by a high-speed motor, it generates a centrifugal force field. Fine powder with a particle size smaller than the cutting fineness is drawn into the center of the classifying wheel and discharged with the airflow. Coarse powder is thrown back into the crushing zone by centrifugal force for further crushing. The fineness of the product can be controlled online by adjusting the speed of the classifying wheel. A guide shroud is located on the classifying wheel. Below, a system guides the powder-laden airflow evenly into the classification zone, avoiding short-circuit flow and improving classification accuracy. In the collection system, a cyclone collector, as the first stage, uses centrifugal sedimentation to collect the finished fine powder. A star-shaped discharge valve at the bottom continuously discharges the powder and prevents air leakage. A bag filter collects the submicron-level ultrafine dust in the exhaust gas. An induced draft fan is located at the end of the system, providing negative pressure suction for the entire system and maintaining a stable unidirectional flow of air from the nozzle through the crushing chamber, classification wheel, cyclone collector, and finally to the dust collector for discharge. The PLC control cabinet centrally controls the classification wheel speed, feed rate, air source pressure, and induced draft fan frequency, and links with the online particle size analyzer to achieve closed-loop automation. The system adjusts and monitors operating parameters such as temperature, pressure, and vibration in real time to ensure safe and stable operation of the device. The gas supply system provides a constant pressure gas source to the Laval nozzles. Therefore, if one of the Laval nozzles becomes blocked, the constant pressure gas supply will not increase the gas pressure in the gas supply pipeline, avoiding the continuous increase in gas pressure in the gas supply pipeline due to the blockage of the Laval nozzle, which could lead to safety hazards. Furthermore, by detecting the gas pressure and flow rate in the gas supply pipeline, it is possible to determine whether there is a blockage in the Laval nozzle. For example, if one Laval nozzle is blocked, the gas flow rate in the gas supply pipeline will be reduced to the original gas supply flow rate under constant pressure. Two arc-shaped tubes 3 are symmetrically installed on the outside of the barrel 1, corresponding to the nozzles. One end of each arc-shaped tube 3 is fitted with a sealing flange plate 4 for sealing. The two arc-shaped tubes 3 form an annular air supply pipe, and under the action of the sealing flange plate 4, the middle of one side of the annular air supply pipe is not connected. The two arc-shaped tubes 3 supply air equally to the Laval nozzles on the barrel 1. An exhaust assembly 5 is installed at the other end of each arc-shaped tube 3 and is connected to the air supply system. The air supply system can evenly distribute the airflow into the two arc-shaped tubes 3 through the exhaust assembly 5. Because one side of each arc-shaped tube 3 is sealed, each arc-shaped tube 3 can form a separate air supply chamber. Since the two arc-shaped tubes 3 equally supply air to the Laval nozzles on the barrel 1, when one Laval nozzle is blocked, the air pressure inside the arc-shaped tube 3 relative to the blocked nozzle will increase. This pressure difference between the two arc-shaped tubes 3 further contributes to the air supply. It can also help determine the approximate location of blocked Laval nozzles, eliminating the need to disassemble and maintain all Laval nozzles. Only the Laval nozzles opposite to the arc tube 3 need to be disassembled and maintained. The pressure sensing component 6 is installed on the top of the drainage component 5. The pressure sensing component 6 is used to convert the air pressure difference inside the symmetrical arc tube 3 into a stroke difference. The pressure sensing component 6 is equipped with a stop component and a linkage component. When the stroke difference converted by the pressure sensing component 6 is greater than the preset value of the stop component, the linkage adjustment mechanism is automatically triggered to adjust the distribution ratio of the airflow delivered by the drainage component 5. That is, the airflow flowing into the arc tube 3 corresponding to the blocked Laval nozzle increases, thereby increasing the air pressure inside the arc tube 3. This increases the flow velocity of the other Laval nozzles corresponding to the blocked arc tube 3, compensating for the difference in airflow between the side of the blocked arc tube 3 and the side of the unblocked arc tube 3. This allows for the ultrafine grinding of the remaining material inside the barrel 1 before stopping the machine for maintenance.

[0020] Furthermore, the drainage assembly 5 includes a tee connector 51, a mounting shaft 52, and a drainage component 53. The tee connector 51 is assembled at the other end of the arc-shaped pipe 3. The mounting shaft 52 is vertically installed inside the tee connector 51. The drainage component 53 is fixedly installed inside the mounting shaft 52. The drainage component 53 is used to regulate the drainage of gas entering the tee connector 51, and the drainage component 53 is arranged with balanced forces on its sides, i.e. Figure 4As shown, when the drain component 53 is centered, the gas entering through the three-way connector 51 can be evenly distributed by the drain component 53, so that the gas flow velocity inside the two arc tubes 3 is the same. At this time, the drain component 53 is subjected to the same force of airflow on both sides. The side of the drain component 53 facing away from the air inlet on the mounting shaft 52 is larger than the side facing the air inlet. Therefore, under the action of airflow, the drain component 53 will remain centered. When the drain component 53 rotates with the mounting shaft 52, the side of the drain component 53 facing the air inlet will have a displacement deviation, and its proportion of gas diversion will change. This will result in different gas flow velocities inside the two arc tubes 3, thereby achieving airflow increase compensation for arc tubes 3 with nozzle blockage. When the linkage adjustment mechanism is not triggered, the stop component will center and limit the drain component 53, that is, ensure the stability of the drain component 53 during normal use and prevent the drain component 53 from rotating arbitrarily.

[0021] In particular, the pressure-sensing component 6 includes a mounting housing 61, a cylinder 62, a vent pipe 65, a piston plate 63, a connector 66, a connecting block 67, a guide rod 69, and a limiting spring 68. The mounting housing 61 is fixedly installed on the top of the tee connector 51. The cylinder 62 is horizontally assembled inside the mounting housing 61. Each end of the inner cavity of the cylinder 62 is equipped with a compression air bladder 64. The vent pipe 65 is assembled between the mounting housing 61 and the arc tube 3, allowing the inner cavity of the arc tube 3 to communicate with the inner cavity of the compression air bladder 64. There are two compression air bladders 64 and two piston plates 63 inside the cylinder 62. The compression air bladders 64 convert the air pressure inside the arc tube 3 into a stroke display. The piston plate 63 is installed inside the cylinder 62. The difference in distance the compression air bladders 64 push the piston plate 63 to move is the stroke difference. The connector 66 is slidably sleeved on the outside of the cylinder 62. The outer wall of the cylinder 62 has a connecting spring. The connecting block 67 corresponds to the sliding hole. The connecting block 67 is fixedly connected between the connecting piece 66 and the piston plate 63. The connecting block 67 makes the connecting piece 66 and the piston plate 63 move synchronously in the same direction. The axis of the guide rod 69 is parallel to the axis of the cylinder 62 and is fixedly installed inside the mounting housing 61. The limiting spring 68 is slidably sleeved on the outside of the guide rod 69. The limiting spring 68 is located between the connecting piece 66 and the stop component. When there is no air pressure inside the arc tube 3, the limiting spring 68 can squeeze the compression airbag 64 through the connecting piece 66, the connecting block 67 and the piston plate 63, so that the compression airbag 64 is in a compressed state. The limiting spring 68 is used to convert the formation difference into an elastic compression difference and transmit it to the stop component. That is, when there is air pressure inside the arc tube 3, the compression airbag 64 expands under the action of air pressure. And when the nozzle is not blocked, the air pressure inside the two arc tubes 3 is the same, so that the two compression airbags 64 expand and push the piston plate 63 to move the same distance.

[0022] Furthermore, the stopping component includes a mounting piece 71 and a stop unit. The mounting piece 71 is slidably sleeved on the outside of the cylinder 62. The end of the limiting spring 68 is pressed against the mounting piece 71. Under the action of the elastic compression difference of the limiting spring 68, the mounting piece 71 translates along the trajectory of the guide rod 69. When the air pressure inside the two arc tubes 3 is the same, the two connecting pieces 66 inside the mounting housing 61 move the same distance in the center under the action of the compressed air bladder 64. Thus, the two connecting pieces 66 exert the same compressive force on the mounting piece 71 through the limiting spring 68, thereby keeping the mounting piece 71 in a stable centered state. When there is a pressure difference inside the arc tube 3, the two connecting parts 66 exert different squeezing forces on the mounting part 71 through the limiting spring 68. As a result, the mounting part 71 will move towards the side with the smaller squeezing force. The mounting shaft 52 is driven to rotate through the linkage component. The stop unit is set between the mounting part 71 and the mounting housing 61. The stop unit is used to lock and limit the mounting part 71 within the overload threshold. When one nozzle is blocked, the two connecting parts 66 have different strokes. At this time, the elastic squeezing difference between the two connecting parts 66 and the mounting part 71 through the limiting spring 68 is greater than the overload threshold. At this time, the mounting part 71 can slide.

[0023] Specifically, the stop unit includes a brake plate 72, a locking pin 73, a ball joint 75, and a stop spring 76. The brake plate 72 is fixedly installed on the inner wall of the mounting housing 61. The side of the mounting member 71 has a slot that mates with the brake plate 72. One side of the inner wall of the slot has an installation groove. One end of the outer wall of the locking pin 73 is slidably sleeved with the inner cavity of the installation groove. One side of the brake plate 72 has a connecting groove 74. The other end of the outer wall of the locking pin 73 is slidably engaged with the inside of the connecting groove 74, thus limiting the distance the mounting member 71 can move, thereby limiting the maximum rotation angle of the drain member 53, i.e., preventing the mounting member 71 from moving too far, which would cause the drain member 53 to rotate. If the rotation angle is too large, the ball head 75 will rotate and be embedded in the end of the locking pin 73. The inner wall of the connecting groove 74 has an arc groove with a depth smaller than the radius of the ball head 75. The ball head 75 will slide and engage inside the arc groove. The stop spring 76 is set inside the mounting groove. The stop spring 76 acts on the locking pin 73 with a spring force towards the brake plate 72, so that the ball head 75 and the brake plate 72 form a locking mechanism within a preset value. When the moving compressive force on the mounting part 71 is less than the overload threshold, the ball head 75 can be stably engaged in the arc groove. Conversely, when the moving compressive force on the mounting part 71 is greater than the overload threshold, the ball head 75 will slide and separate from the arc groove.

[0024] Specifically, the linkage components include a transmission component 81 and a transmission rod 83. The transmission component 81 is fixedly installed on the top of the mounting shaft 52, and a long strip-shaped mounting hole 82 is opened on the top of the transmission component 81. The transmission rod 83 is fixedly installed on the bottom of the mounting component 71, and the outer wall of the transmission rod 83 is slidably engaged with the inside of the mounting hole 82. The axis of the transmission rod 83 is parallel and offset from the axis of the mounting shaft 52. The mounting component 71 drives the transmission rod 83 to translate, so that the transmission rod 83 moves within the mounting hole 82, so that the transmission component 81 drives the mounting shaft 52 to rotate. That is, when the mounting component 71 moves, the mounting component 71 can drive the mounting shaft 52 to rotate through the transmission rod 83 and the transmission component 81.

[0025] Another objective of this invention is to provide a method for supersonic classification and refinement of cement powder, comprising the following specific steps: When crushing cement powder, the screw feeder feeds the material into the barrel 1, the air supply system supplies air into the two arc pipes 3 through the discharge component 5, the arc pipes 3 supply gas to the Laval nozzle, the Laval nozzle sprays a supersonic jet of more than 500m / s to impact and crush the material, and the particle size of the finished product is controlled by controlling the rotation speed of the classifying wheel unit 2, and the discharged material is collected by the cyclone collector. The vent pipe 65 makes the air pressure inside the compression airbag 64 the same as the air pressure inside the arc tube 3. The compression airbag 64 expands and pushes the piston plate 63 to move inside the cylinder 62. The piston plate 63 drives the connecting piece 66 to move synchronously through the connecting block 67. The two connecting pieces 66 convert the stroke movement into elastic potential energy to squeeze the mounting piece 71 through the limit spring 68. When there is a pressure difference in the arc pipe 3 outside the barrel 1, that is, when there is nozzle blockage, the two connecting parts 66 on the side of the mounting part 71 have a forming difference, that is, the elastic potential energy transmitted by the two connecting parts 66 on the side of the mounting part 71 through the limiting spring 68 has an elastic compression difference. When the elastic compression difference is greater than the overload threshold of the stop unit, the mounting part 71 moves away from the side with nozzle blockage. The mounting part 71 drives the drainage part 53 to rotate through the linkage component to increase the gas flow of the arc pipe 3 on the blocked side and compensate the airflow on the blocked side of the nozzle. After the machine stops, the compressed air bladder 64 and the connecting piece 66 inside the cylinder 62 are reset, and the mounting piece 71 is reset in the center under the action of the limit spring 68, so that the mounting piece 71 is reset in the center through the rotation of the linkage component drain piece 53.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A supersonic classification and refining device for cement powder, characterized in that: include: A barrel (1) is equipped with a nozzle and a grading wheel unit (2). The arc tube (3) is installed symmetrically on the outside of the barrel (1) in relation to the nozzle. One end of the arc tube (3) is fitted with a sealing flange plate (4) to achieve sealing. Drainage assembly (5), which is installed at the other end of the arc tube (3); Pressure sensing component (6) is installed on the top of the drainage component (5). The pressure sensing component (6) is used to convert the air pressure difference inside the symmetrical arc tube (3) into a stroke difference. The pressure sensing component (6) is equipped with a stop component and a linkage component. When the stroke difference converted by the pressure sensing component (6) is greater than the preset value of the stop component, the linkage adjustment mechanism is automatically triggered to adjust the distribution ratio of the airflow delivered by the drainage component (5).

2. The cement powder supersonic classification and refining device according to claim 1, characterized in that: The drainage component (5) includes: A three-way connector (51) is fitted to the other end of the arc pipe (3); Mounting shaft (52), which is vertically mounted inside the tee connector (51); Drainage component (53) is fixedly installed inside the mounting shaft (52). The drainage component (53) is used to regulate the drainage of gas entering the three-way connector (51). The drainage component (53) is set with balanced force on its sides. When the linkage adjustment mechanism is not triggered, the stop component limits the drainage of the drainage component (53) to the center.

3. The cement powder supersonic classification and refining device according to claim 2, characterized in that: The pressure-sensing component (6) includes: Mounting housing (61), which is fixedly mounted on the top of tee connector (51); Cylinder (62), which is horizontally mounted inside the mounting housing (61), and each end of the inner cavity of the cylinder (62) is equipped with a compressed air bag (64). Vent pipe (65) is assembled between mounting housing (61) and arc tube (3). Vent pipe (65) connects the inner cavity of arc tube (3) with the inner cavity of compression airbag (64). Compression airbag (64) is used to convert the air pressure inside arc tube (3) into stroke display.

4. The cement powder supersonic classification and refining device according to claim 3, characterized in that: The pressure-sensing component (6) also includes: Piston plate (63), the piston plate (63) is installed inside the cylinder (62), and the distance difference between the piston plate (63) moved by the compressed air bag (64) inside the cylinder (62) is the stroke difference; A connector (66) is slidably sleeved on the outside of the cylinder (62); The cylinder (62) has a sliding hole on its outer wall corresponding to the connecting block (67). The connecting block (67) is fixedly connected between the connecting member (66) and the piston plate (63). The connecting block (67) makes the connecting member (66) and the piston plate (63) move synchronously in the same direction.

5. The cement powder supersonic classification and refining device according to claim 4, characterized in that: The pressure-sensing component (6) also includes: Guide rod (69), the axis of the guide rod (69) is parallel to the axis of the cylinder (62) and fixedly installed inside the mounting housing (61); A limiting spring (68) is slidably sleeved on the outside of the guide rod (69). The limiting spring (68) is located between the connector (66) and the stop component. The limiting spring (68) is used to convert the forming difference into an elastic compression difference and transmit it to the stop component.

6. The cement powder supersonic classification and refining device according to claim 5, characterized in that: The stop component includes: Mounting component (71), which is slidably sleeved on the outside of cylinder (62), the end of the limiting spring (68) is pressed against the mounting component (71), the mounting component (71) moves along the trajectory of guide rod (69) under the action of the elastic compression difference of the limiting spring (68), and drives the mounting shaft (52) to rotate through the linkage component; A stop unit is disposed between the mounting member (71) and the mounting housing (61), and the stop unit is used to lock and limit the mounting member (71) within an overload threshold.

7. The cement powder supersonic classification and refining device according to claim 6, characterized in that: The stop unit includes: Brake plate (72), the brake plate (72) is fixedly installed on the inner wall of the mounting housing (61), and the side of the mounting part (71) is provided with a groove that mates with the brake plate (72); The locking post (73) has an installation groove on one side of the inner wall of the slot. One end of the outer wall of the locking post (73) is slidably sleeved with the inner cavity of the installation groove. The brake plate (72) has a connecting groove (74) on one side. The other end of the outer wall of the locking post (73) is slidably engaged with the inside of the connecting groove (74). The distance that the mounting part (71) moves is limited, so as to limit the maximum rotation angle of the drain part (53).

8. The cement powder supersonic classification and refining device according to claim 7, characterized in that: The stop unit further includes: Ball head (75), the ball head (75) is rotatably embedded in the end of the locking post (73), the inner wall of the connecting groove (74) is provided with an arc groove with a depth less than the radius of the ball head (75), and the ball head (75) is slidably engaged in the inside of the arc groove; A stop spring (76) is provided inside the mounting groove. The stop spring (76) acts on the locking pin (73) with a spring force toward the brake plate (72) so that the ball head (75) and the brake plate (72) form a locking mechanism within a preset value.

9. The cement powder supersonic classification and refining device according to claim 8, characterized in that: The linkage component includes: Transmission component (81), which is fixedly installed on the top of mounting shaft (52), and the top of transmission component (81) is provided with a long strip-shaped mounting hole (82). The transmission rod (83) is fixedly installed at the bottom of the mounting component (71). The outer wall of the transmission rod (83) is slidably engaged with the inside of the mounting hole (82). The axis of the transmission rod (83) is parallel and offset from the axis of the mounting shaft (52). The mounting component (71) drives the transmission rod (83) to translate, so that the transmission rod (83) moves within the mounting hole (82), so that the transmission component (81) drives the mounting shaft (52) to rotate.

10. A method for supersonic classification and refinement of cement powder, characterized in that, The method includes the cement powder supersonic classification and refining device as described in claim 9, specifically including the following steps: The vent pipe (65) makes the air pressure inside the compression airbag (64) the same as the air pressure inside the arc pipe (3). The compression airbag (64) expands and pushes the piston plate (63) to move inside the cylinder (62). The piston plate (63) drives the connecting piece (66) to move synchronously through the connecting block (67). The connecting piece (66) converts the stroke movement into elastic potential energy to squeeze the mounting piece (71) through the limiting spring (68). When there is a pressure difference in the arc pipe (3) outside the barrel (1), that is, when there is nozzle blockage, the connecting part (66) on the side of the mounting part (71) has a forming difference, that is, the elastic potential energy transmitted by the connecting part (66) on the side of the mounting part (71) through the limiting spring (68) has an elastic compression difference. When the elastic compression difference is greater than the overload threshold of the stop unit, the mounting part (71) moves away from the side with nozzle blockage. The mounting part (71) drives the drainage part (53) to rotate through the linkage component to increase the gas flow of the arc pipe (3) on the blocked side and compensate the airflow on the side with nozzle blockage. After the machine stops, the compressed air bladder (64) and connecting piece (66) inside the cylinder (62) are reset, and the mounting piece (71) is reset in the center under the action of the limit spring (68), so that the mounting piece (71) is reset in the center by rotating through the linkage component drain piece (53).

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