Device and method for automatically controlling secondary air volume to improve powder selecting efficiency of powder selecting machine

Abstract

The invention discloses a device and method for automatically controlling the secondary air volume to improve the powder selecting efficiency of a powder selecting machine. During use, after an electric actuator receives a control signal sent by a DCS control system, an output shaft of the electric actuator can be driven to rotate, and then all connecting shafts are driven to rotate through cooperation of a rotating disc, an eccentric shaft, a transmission connecting rod and a connecting assembly; finally, the corresponding blades are driven to rotate, so that the opening degree of the two adjacent blades is increased or decreased; when the opening degree is increased, under the action of negative pressure in the powder concentrator, external natural air can be supplemented through the air supplementing holes and enters the rotor of the powder concentrator through the beveling angles of the guide vanes to increase the powder concentration air volume, and the powder concentration efficiency of the powder concentrator is improved. By the adoption of the automatic control mode, the purpose of improving the powder selecting efficiency by adjusting the angles of the guide vanes can be achieved, the operation process is simple and rapid, safety is high, meanwhile, the opening degree of the two adjacent vanes, namely the air supplementing degree of the powder selecting machine, can be adjusted in real time according to the process condition, and the operation efficiency of the powder selecting machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of the application of a classifier, and particularly to a device and method for automatically controlling the secondary air volume to improve the classification efficiency of the classifier. Background Art

[0002] In the cement grinding system, the high-efficiency classifier is one of the core equipment. Its main function is to classify and separate the ground materials to improve the grinding efficiency, optimize the particle size distribution of the products, and reduce the energy consumption. By achieving the goals of energy conservation, production increase, and quality improvement through precise classification, it is an essential key equipment in modern cement production, and its performance directly affects the system energy consumption, output, and the final quality of cement.

[0003] Currently, the cement grinding system is equipped with a TESu-330 high-efficiency classifier. In actual use, to improve the classification efficiency of the classifier, it is necessary to regularly adjust the opening degree of the guide vanes inside the high-efficiency classifier. The guide vanes are inside the classifier, and their opening degree can affect the air volume and material volume entering the rotor of the classifier, thus affecting the efficiency of the classifier. However, each time the opening degree is adjusted, the operator needs to enter the inside of the classifier, cut off the upper and lower fixing points of the guide vanes and then reposition and weld them. The operation process is cumbersome and complex, the construction risk is relatively high, and it can be used for a long time after one debugging, which instead poses a certain obstacle to the efficient operation of the classifier. Summary of the Invention

[0004] The purpose of this application is to provide a device for automatically controlling the secondary air volume to improve the classification efficiency of the classifier, so as to solve the problems that the traditional air volume adjustment method of the classifier is cumbersome and complex in the operation process, has a relatively high construction risk, and can be used for a long time after one debugging, thus posing a certain obstacle to the efficient operation of the classifier.

[0005] To solve the above technical problems, this application provides a device for automatically controlling the secondary air volume to improve the classification efficiency of the classifier, including:

[0006] A first installation groove arranged on the outer side surface of the classifier and a second installation groove communicated with the first installation groove. A supplementary air hole communicating with the inside of the classifier is arranged at the first installation groove. A door frame body is arranged at the supplementary air hole. An electric actuator is installed in the second installation groove. One end of the output shaft of the electric actuator is fixed with a turntable. An eccentric shaft is fixed on the turntable. The lower end of the eccentric shaft is rotatably installed with a transmission connecting rod. One end of the transmission connecting rod is rotatably installed with a connecting component. A plurality of connecting shafts are installed on the connecting component. One end of each connecting shaft extends into the door frame body through the upper side of the door frame body. Blades located inside the door frame body are arranged at the lower ends of each connecting shaft. The electric actuator is in communication connection with the DCS control system.

[0007] As a preferred embodiment, a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator, the connecting component includes a horizontal plate and a plurality of connecting plates rotatably connected to one side of the horizontal plate, the upper end of the connecting shaft is fixed to the connecting plate, an installation plate is fixed to the other side of the horizontal plate, and one end of the transmission connecting rod is rotatably connected to the installation plate.

[0008] It should be noted in the solution that, for a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator, a protective net is also installed at the air supply opening of the door frame body.

[0009] It should be further noted in the solution that, for a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator, the model of the electric actuator is LD944W.

[0010] To solve the above technical problems, the present application also provides a method for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator. Based on any one of the above devices for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator, it includes:

[0011] Sending a control signal to the electric actuator through the DCS control system;

[0012] When the electric actuator receives the control signal, while driving the rotation of its output shaft, it drives the rotation of each connecting shaft through the cooperation of the turntable, eccentric shaft, transmission connecting rod and connecting component;

[0013] When each connecting shaft rotates, it drives the corresponding blade to rotate, increasing or decreasing the opening degree between adjacent two blades;

[0014] When the opening degree between adjacent two blades increases, under the action of the negative pressure inside the powder separator, the external natural wind can supply air to the inside of the powder separator through the air supply holes, and enter the inside of the powder separator rotor through the oblique cutting angle of the guide vanes to increase the powder selection air volume.

[0015] Compared with the prior art, a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator provided by the present invention includes a first installation groove provided on the outer side surface of the powder separator and a second installation groove communicated with the first installation groove. A air supply hole communicated with the inside of the powder separator is provided at the first installation groove, a door frame body is provided at the air supply hole, an electric actuator is installed in the second installation groove, a turntable is fixed to one end of the output shaft of the electric actuator, an eccentric shaft is fixed to the turntable, the lower end of the eccentric shaft is rotatably installed with a transmission connecting rod, one end of the transmission connecting rod is rotatably installed with a connecting component, a plurality of connecting shafts are installed on the connecting component, one end of each connecting shaft extends into the door frame body through the upper side of the door frame body, and blades located inside the door frame body are provided at the lower ends of each connecting shaft. The electric actuator is in communication connection with the DCS control system.

[0016] During use, when the electric actuator receives the control signal sent by the DCS control system, it can drive its output shaft to rotate. Then, through the cooperation of the turntable, eccentric shaft, transmission connecting rod and connecting component, each connecting shaft is driven to rotate. Finally, the corresponding blades are driven to rotate, increasing or decreasing the opening degree between two adjacent blades. When the opening degree between two adjacent blades increases, under the action of the negative pressure inside the classifier, the external natural wind can supply air to the inside of the classifier through the air supply holes, enter the inside of the classifier rotor through the oblique cutting angle of the guide vanes, increase the air volume for classification, and improve the classification efficiency of the classifier. Using this automatic control method can also achieve the purpose of improving the classification efficiency by adjusting the angle of the guide vanes. Moreover, using the method in this application, the operation process is simple and fast, and the operation process has high safety. At the same time, the opening degree between two adjacent blades, that is, the air supply amount of the classifier, can be adjusted in real time according to the process conditions, improving the operation efficiency of the classifier. The effect of the method is as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 FIG. is a schematic structural diagram of a device for automatically controlling the secondary air volume to improve the classification efficiency of a classifier provided by an embodiment of the present application;

[0019] Figure 2 FIG. is a schematic structural diagram of another device for automatically controlling the secondary air volume to improve the classification efficiency of a classifier provided by an embodiment of the present application;

[0020] Figure 3 FIG. is a schematic structural diagram of a connection structure between a connection component, an electric actuator and a blade provided by an embodiment of the present application;

[0021] In the figure: 1. Classifier; 2. First installation groove; 3. Second installation groove; 4. Door frame body; 5. Electric actuator; 6. Turntable; 7. Eccentric shaft; 8. Transmission connecting rod; 9. Connecting shaft; 10. Blade; 11. Horizontal plate; 12. Connecting plate; 13. Installation plate; 14. Protection net; 15. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings.

[0023] The core of this application is to provide a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator, which solves the problems that the traditional air volume adjustment method of the powder separator is cumbersome and complex in the operation process, has a greater construction risk, and has a long service time after one commissioning, thus posing a certain obstacle to the efficient operation of the powder separator.

[0024] Figure 1 It is a schematic structural diagram of a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator provided by an embodiment of this application. Figure 2 It is a schematic structural diagram of another device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator provided by an embodiment of this application. Figure 3 It is a schematic structural diagram of a connection component connected to an electric actuator and a blade provided by an embodiment of this application. Refer to Figures 1 to 3 as shown.

[0025] Embodiment 1

[0026] A device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator includes a first installation groove 2 and a second installation groove 3 provided on the outer side of the powder separator 1. The first installation groove 2 and the second installation groove 3 are communicated. A supplementary air hole communicating with the inside of the powder separator 1 is provided at the first installation groove 2 (not shown in the figure). A door frame body 4 is provided at the supplementary air hole. The door frame body 4 is convexly arranged. An electric actuator 5 is installed in the second installation groove 3. The working principle of the electric actuator 5 can refer to the prior art. The electric actuator 5 selected is the model LD944W electric actuator produced by Shanghai Valve Factory No. 5. The temperature of this electric actuator ≤ 300 °C and the pressure is 0.1 Mpa. A turntable 6 is fixed at one end of the output shaft of the electric actuator 5. An eccentric shaft 7 is fixed on the turntable 6. In actual design, the eccentric shaft 7 and the turntable 6 can be integrally formed. A transmission connecting rod 8 is rotatably installed at the lower end of the eccentric shaft 7. The transmission connecting rod 8 is inclined as shown in the figure. A connection component is rotatably installed at one end of the transmission connecting rod 8 through a bolt 15. A plurality of connecting shafts 9 are installed on the connection component. After installation, one end of each connecting shaft 9 extends to the inside of the door frame body 4 through the upper side of the door frame body 4. Blades 10 are provided at the lower ends of each connecting shaft 9. The blades 10 are located inside the door frame body 4. After installation, the arrangement of each blade 10 is similar to the setting of a louver. The electric actuator 5 is communicatively connected to a DCS control system.

[0027] During actual operation, when it is necessary to adjust the air volume in the classifier 1, a control signal can be sent to the electric actuator 5 through the DCS control system. After receiving the control signal, the electric actuator 5 will control the rotation of the output shaft, which will drive the turntable 6 to rotate, causing the eccentric shaft 7 and the transmission connecting rod 8 to act. The connecting components cooperate to drive each connecting shaft 9 to rotate. At the same time, under the limiting effect of the door frame body 4 on each connecting shaft 9, the blades 10 are finally driven to rotate, realizing the adjustment of the gap opening between two adjacent blades 10. When the gap opening between two adjacent blades 10 increases, under the action of the negative pressure inside the classifier 1, the external natural wind can enter the inside of the classifier 1 through this gap and the air supply holes for air supply, enter the rotor inside the classifier 1 through the oblique cutting angle of the guide vane, increase the air volume for classification, and thus realize the adjustment of the air intake volume inside the classifier 1, improving the classification efficiency of the classifier. The size of the gap opening between two adjacent blades 10 can be adjusted according to the specific process conditions. The device in this embodiment can also achieve the purpose of improving the classification efficiency by adjusting the angle of the guide vane.

[0028] Embodiment 2

[0029] Based on Embodiment 1, a device for automatically controlling the secondary air volume to improve the classification efficiency of a classifier, the connecting component includes a cross plate 11 and a plurality of connecting plates 12 rotatably connected to one side of the cross plate 11. The upper end of the connecting shaft 9 is fixedly connected to the connecting plate 12. An installation plate 13 is fixed to the other side of the cross plate 11. One end of the transmission connecting rod 8 is rotatably connected to the installation plate 13. When the eccentric shaft 7 acts, the cross plate 11 can be driven to make a reciprocating motion through the transmission connecting rod 8, and then the connecting shaft 9 is driven to rotate through the connecting plate 12, and finally the blades 10 are driven to rotate, realizing the adjustment of the gap opening between two adjacent blades 10.

[0030] Based on Embodiment 1, a device for automatically controlling the secondary air volume to improve the classification efficiency of a classifier. Preferably, a protective net 14 is also installed at the air supply opening of the door frame body 4 to block external impurities.

[0031] A device for automatically controlling the secondary air volume to improve the classification efficiency of a classifier provided by the present invention includes a first installation groove 2 provided on the outer side surface of the classifier 1 and a second installation groove 3 communicated with the first installation groove 2. A air supply hole communicating with the inside of the classifier 1 is provided at the first installation groove 2, and a door frame body 4 is provided at the air supply hole. An electric actuator 5 is installed in the second installation groove 3. One end of the output shaft of the electric actuator 5 is fixed with a turntable 6, an eccentric shaft 7 is fixed on the turntable 6, the lower end of the eccentric shaft 7 is rotatably installed with a transmission connecting rod 8, one end of the transmission connecting rod 8 is rotatably installed with a connecting component, a plurality of connecting shafts 9 are installed on the connecting component, one end of each connecting shaft 9 extends into the door frame body 4 through the upper side of the door frame body 4, and blades 10 located inside the door frame body 4 are provided at the lower ends of each connecting shaft 9. The electric actuator 5 is communicatively connected with the DCS control system.

[0032] In use, when the electric actuator 5 receives the control signal sent by the DCS control system, it can drive the rotation of its output shaft, and then drive the rotation of each connecting shaft 9 through the cooperation of the turntable 6, the eccentric shaft 7, the transmission connecting rod 8 and the connecting component; finally drive the rotation of the corresponding blades 10 to increase or decrease the opening degree between two adjacent blades 10; when the opening degree between two adjacent blades 10 increases, under the action of the negative pressure inside the classifier 1, the external natural wind can replenish air into the classifier 1 through the air replenishing holes, and enter the rotor of the classifier 1 through the bevel angle of the guide vane 10 to increase the air volume for powder selection and improve the powder selection efficiency of the classifier 1. Using this automatic control method can also achieve the purpose of improving the powder selection efficiency by adjusting the angle of the guide vane 10. Moreover, using the method in this application, the operation process is simple and fast, and the operation process has high safety. At the same time, the opening degree between two adjacent blades 10, that is, the air replenishing amount of the classifier 1, can be adjusted in real time according to the process conditions, improving the operation efficiency of the classifier 1.

[0033] In the above text, an embodiment of a device for automatically controlling the secondary air volume to improve the powder selection efficiency of a classifier is described in detail. Based on the device for automatically controlling the secondary air volume to improve the powder selection efficiency of a classifier described in the above embodiment, the embodiment of the present invention also provides a method for automatically controlling the secondary air volume to improve the powder selection efficiency of a classifier corresponding to this device. Since the embodiments in the method part correspond to the embodiments in the device part, the embodiments in the method part are described with reference to the embodiments in the device part and will not be elaborated here.

[0034] A method for automatically controlling the secondary air volume to improve the powder selection efficiency of a classifier, based on any one of the above devices for automatically controlling the secondary air volume to improve the powder selection efficiency of a classifier, includes the following steps:

[0035] S1: Send a control signal to the electric actuator 5 through the DCS control system;

[0036] S2: When the electric actuator 5 receives the control signal, while driving the rotation of its output shaft, drive the rotation of each connecting shaft 9 through the cooperation of the turntable 6, the eccentric shaft 7, the transmission connecting rod 8 and the connecting component;

[0037] S3: When each connecting shaft 9 rotates, drive the corresponding blades 10 to rotate to increase or decrease the opening degree between two adjacent blades 10;

[0038] S4: When the opening degree between two adjacent blades 10 increases, under the action of the negative pressure inside the classifier 1, the external natural wind can replenish air into the classifier 1 through the air replenishing holes, and enter the rotor of the classifier 1 through the bevel angle of the guide vane 10 to increase the air volume for powder selection.

[0039] A method for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator. After the electric actuator 5 receives the control signal sent by the DCS control system, it can drive the rotation of its output shaft, and then drive the rotation of each connecting shaft 9 through the cooperation of the turntable 6, eccentric shaft 7, transmission connecting rod 8 and the connecting component; finally drive the corresponding blade 10 to rotate to increase or decrease the opening degree between two adjacent blades 10; when the opening degree between two adjacent blades 10 increases, under the action of the negative pressure inside the powder separator 1, the external natural air can replenish air into the powder separator 1 through the air replenishing hole, enter the inside of the rotor of the powder separator 1 through the bevel angle of the guide vane 10 to increase the powder selection air volume, and improve the powder selection efficiency of the powder separator 1. Adopting this air volume control method, the operation process is simple and fast, and the safety is high. At the same time, the opening degree between two adjacent blades 10, that is, the air replenishing amount of the powder separator 1, can be adjusted in real time according to the process conditions, thereby improving the operation efficiency of the powder separator 1.

[0040] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is pointed out by the claims.

[0041] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The embodiments of the present application described above do not constitute a limitation on the protection scope of the present application.

Claims

1. An apparatus for automatically controlling the secondary air volume to improve the separation efficiency of a separator, characterized in that, Comprising: A first installation groove (2) provided on the outer side of the classifier (1) and a second installation groove (3) communicating with the first installation groove (2). A makeup air hole communicating with the inside of the classifier (1) is provided at the first installation groove (2). A door frame body (4) is provided at the makeup air hole. An electric actuator (5) is installed in the second installation groove (3). One end of the output shaft of the electric actuator (5) is fixed with a turntable (6). An eccentric shaft (7) is fixed on the turntable (6). The lower end of the eccentric shaft (7) is rotatably installed with a transmission connecting rod (8). One end of the transmission connecting rod (8) is rotatably installed with a connecting assembly. A plurality of connecting shafts (9) are installed on the connecting assembly. One end of each connecting shaft (9) extends into the door frame body (4) through the upper side of the door frame body (4). A blade (10) located inside the door frame body (4) is provided at the lower end of each connecting shaft (9). The electric actuator (5) is communicatively connected to the DCS control system.

2. The device for automatically controlling the secondary air volume to improve the selection efficiency of the classifier according to claim 1, characterized in that, The connecting assembly includes a cross plate (11) and a plurality of connecting plates (12) rotatably connected to one side of the cross plate (11). The upper end of the connecting shaft (9) is fixed to the connecting plate (12). An installation plate (13) is fixed to the other side of the cross plate (11). One end of the transmission connecting rod (8) is rotatably connected to the installation plate (13).

3. The device for automatically controlling the secondary air volume to improve the selection efficiency of the classifier according to claim 1, wherein, A protective net (14) is further installed at the makeup air opening of the door frame body (4).

4. The device for automatically controlling the secondary air volume to improve the separation efficiency of the separator according to claim 1, wherein The model of the electric actuator (5) is LD944W.

5. A method for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator, based on the device for automatically controlling the secondary air volume to improve the powder selection efficiency of a powder separator according to any one of claims 1 to 4, characterized in that, Comprising: Sending a control signal to the electric actuator (5) through the DCS control system; When the electric actuator (5) receives the control signal, while driving the rotation of its output shaft, it drives the rotation of each connecting shaft (9) through the cooperation of the turntable (6), the eccentric shaft (7), the transmission connecting rod (8) and the connecting assembly; When each connecting shaft (9) rotates, it drives the corresponding blade (10) to rotate to increase or decrease the opening degree between two adjacent blades (10); When the opening degree between two adjacent blades (10) increases, under the action of the negative pressure inside the classifier (1), the external natural wind can make up the air for the inside of the classifier (1) through the makeup air hole and enter the rotor inside the classifier (1) through the bevel angle of the guide blade (10) to increase the powder selection air volume.

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