Distribution method of SCP machine feeding device

Abstract

The invention provides a material distribution method of an SCP machine feeding device. The material distribution method comprises the following steps that S1, a background data block DB22 is generated; s2, establishing a variable table in the generated DB22 block; s3, storing the original assignment data in the 0B22 background data block; s4, determining feeding speed control parameters of each group of feeding devices; s5, setting the interval time of rapid propelling of the feeding device to be 2.5 s; s6, the interval time of slow back-off of the feeding device is set to be 3.2 s; s7, setting all groups of feeding devices as variables corresponding to the DB22 in combination with the feeding speed control parameters in the S5 and the S6 and the background data block variables of the DB22; and S8, drawing a parameter modification window and a picture of the feeding device on the human-computer interface, wherein the current control parameter value of the feeding device is directly displayed on the picture in a decimal mode. The coal charging success rate of the SCP machine is increased, the cake collapse frequency is reduced, the cake collapse accident treatment time is shortened, the production cost is saved, and high economic benefits and environmental protection benefits are achieved.

Description

Technical Field

[0001] This invention relates to the field of tamping coke oven technology, and more particularly to a feeding method for an SCP machine feeding device. Background Technology

[0002] The feeding device of the SCP machine is a key link in the coal distribution control of the integrated SCP machine on the side of the coke oven machine. The integrated SCP machine integrates coke pushing, tamping, and coal charging. Its tamping system consists of a tamping box, tamping hammer, and plate feeding device. The feeding device operates in a push-and-return manner, using baffles to distribute the coal into the coal box for cyclical distribution, aiming to provide a suitable coal distribution base for coal cake tamping and forming.

[0003] In the existing SCP machine feeding device, the coal distribution is mainly controlled by the push and pull of the feeder in conjunction with the action of the baffle. When the feeder is running, the push and pull speeds are set to different modes, i.e., push slowly and pull quickly, in order to control the rhythm and amount of coal feeding, thereby meeting the coal supply requirements during the coal cake compaction process.

[0004] However, the current coal feeding method has many problems. First, due to the different advance and retreat speeds of individual feeders, the slow-push-fast-return pattern leads to instability in the feeding process during actual operation, resulting in sudden increases and decreases in coal supply. This causes uneven stress on the coal during compaction, easily leading to breakage of the formed coal cake, and in severe cases, even collapse of the coal cake during the charging process, directly affecting normal production. Second, the significant differences in feeding rates between different feeding device groups result in a lack of effective coordination in the entire coal feeding control process, greatly increasing the difficulty of controlling the coal cake height, frequently causing coal cake gaps, and severely reducing the success rate of coal charging. This has become a key factor restricting the increase of coke oven output, thus urgently requiring innovation and improvement of the coal feeding control method. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a feeding method for an SCP machine feeding device to solve the technical problem of large differences in feeding rates between groups in existing feeding methods.

[0006] The technical means employed in this invention are as follows: A method for feeding a material using an SCP machine's feeding device includes the following steps: S1. Use Step7 software to generate background data block DB22 from the FB22 function block of the feeding device control program. S2. Create a variable table within the generated DB22 block, with the variable data type being double word; S3. Store the original assignment data of the feeding device control program into the 0B22 background data block; S4. Based on the actual working conditions of tamping coal cakes on site, combine the initial values ​​set by the previous feeding device control program, reduce the initial value if the feeding speed exceeds the set value, increase the initial value if the feeding speed is lower than the set value, and finally determine the feeding speed control parameters for each group of feeding devices. S5. Set the interval time for rapid advance of the feeding device in the control program to 2.5s; S6. Set the interval time for the slow retraction of the feeding device in the control program to 3.2s; S7. Combining the feeding speed control parameters of S5 and S6 with the DB22 background data block variables, set all group feeding devices to the variables corresponding to DB22; S8. Draw the feeder parameter modification window and screen in the human-machine interface. The window variables also directly call the DB22 data block variables. The screen directly displays the current feeder control parameter values ​​in decimal format. S9. When production conditions are adjusted, based on the on-site coal cake height data and the current feeding speed of the feeding device, open the corresponding feeding device window whose feeding parameters need to be modified through the HMI screen, enter the target data using the virtual keyboard, and press the Enter button to complete the parameter modification.

[0007] Furthermore, the variable table established within the DB22 block has addresses sequentially ordered from DBD0 to DBD44, with a total of n variables. Each group of variables corresponds to a feeding device control parameter.

[0008] Furthermore, the original assignment data of the feeding device control program is stored in the 0B22 background data block. The specific data stored is: DB22.DBD0=5.54E+01, DB22.DBD4=5.3E+01……DB22.DBD44=3.3E+01, until all n sets of data are assigned.

[0009] Furthermore, the feeding speed control parameters of the n sets of feeding devices are determined based on the actual working conditions of tamping coal cakes on site, combined with the initial values ​​set in the previous feeding device control program. For feeding speeds exceeding the set values, the initial values ​​are reduced, and for feeding speeds below the set values, the initial values ​​are increased.

[0010] Furthermore, the original control programs of PF1-PF12 are modified, and the control parameters of the n feeding devices are replaced with the variables corresponding to DB22. Specifically, PF1 and 5.54E+02 are replaced with DB22.DBD0, PF2 and 5.64E+02 are replaced with DB22.DBD4, PF3 and 5.34E+02 are replaced with DB22.DBD8, ... PF12 and 5.54E+02 are replaced with DB22.DBD44, until all n groups are replaced.

[0011] Compared with the prior art, the present invention has the following advantages: This invention summarizes and refines a new coal material control method, which can achieve precise coal material distribution in a high-efficiency and fast manner, reducing the labor intensity of on-site personnel; at the same time, it greatly improves the coal loading success rate of SCP machines, reduces the number of coal cake collapses, shortens the time for handling coal cake collapse accidents, saves production costs, and has high economic and environmental benefits.

[0012] This invention mainly embodies the combined application of STEP software and HMI, and provides a method for operators to easily modify the control parameters of the feeding device. It can synchronously modify the feeding mode of the feeding device according to changes in production conditions, thereby meeting production needs and having strong operability and controllability. At the same time, it enhances the compactness of the coal cake, improves the coal charging success rate, and has high economic and environmental benefits. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0016] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0017] like Figure 1 As shown, the present invention provides a feeding method for an SCP machine, comprising the following steps: S1. First, use Step7 software to generate background data block DB22 from function block FB22 of the feeding device control program; S2. Create a variable table within the generated DB22 block. The variable data type is double word, and the addresses are sorted sequentially from DBD0 to DBD44. A total of 12 groups of variables are created. S3. Change the direct assignment method of the feeding device control program design: Instead of directly assigning decimal values ​​to the feeding device control inverter, use the method of registering the original assignment data of the feeding device control program in the 0B22 background data block. The data is registered as: DB22.DBD0=5.54E+01, DB22.DBD4=5.3E+01……DB22.DBD44=3.3E+01, until all 12 sets of data are assigned. This facilitates direct calling of the program later and will not cause loss of directly assigned data due to power failure of the PLC system, thus affecting the control of the feeding device. S4. Based on the actual working conditions of tamping coal cakes on site, we combined the initial values ​​set by the previous feeding device control program, reduced the initial values ​​for fast feeding speeds and increased the initial values ​​for slow feeding speeds, and finally determined the feeding speed control parameters for 12 groups (PF1-PF12) of feeding devices.

[0018] S5. In order to ensure that the coal cake is subjected to uniform force during the compaction process and to prevent discontinuity and improve the compactness of the coal cake, we changed the original "one fast and one slow" control mode of the feeding device. We modified the feeding device control program setting to increase the interval of the fast advance of the feeding device from 1.5s to 2.5s.

[0019] S6. In order to shorten the time interval of its slow retraction, we have changed the setting of the slow retraction interval of the feeding device control program from the original 6s to 3.2s. After adjusting the time interval of the fast and slow control, the feeding device has now changed to a uniform feeding mode, which can effectively improve the uniformity of the force on the coal during the coal cake compaction process.

[0020] S7. After modifying the feeding method of the feeding device, we combined the previously set feeding speed control parameters and DB22 background data block variables to modify the original control program of PF1-PF12. We replaced the original corresponding control parameters of the 12 feeding devices, such as: PF1, 5.54E+02 to DB22.DBD0, PF2, 5.64E+02 to DB22.DBD4, PF3, 5.34E+02 to DB22.DBD8... PF12, 5.54E+02 to DB22.DBD44, until all 12 groups were replaced.

[0021] S8. After replacing all 12 sets of feeding device control parameters with the corresponding variables of the background data block DB22, we draw the feeding device parameter modification window and screen on the human-machine interface. The variables in the window (PF1……PF12) also directly call the DB22 data block variables (DB22.DBD0……DB22.DBD44). The screen will directly display the current feeding device control parameter values ​​in decimal format, which is intuitive and easy for operators to observe and compare with subsequent data modifications.

[0022] S9. In the event of adjustments to production conditions later, personnel can directly access the HMI screen based on the on-site coal cake height data and the current feeding speed of the feeding device to open the corresponding feeding device window for which the feeding parameters need to be modified. For system security and stability, and to prevent malicious data modification, we have set modification permissions, requiring personnel to log in before they can modify the data. Using the virtual keyboard, we can directly enter the data we want and press the Enter button to complete the parameter modification. The whole process is both safe and convenient.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for feeding a material in an SCP machine feeding device, characterized in that, Includes the following steps: S1. Use Step7 software to generate background data block DB22 from the FB22 function block of the feeding device control program. S2. Create a variable table within the generated DB22 block, with the variable data type being double word; S3. Store the original assignment data of the feeding device control program into the 0B22 background data block; S4. Based on the actual working conditions of tamping coal cakes on site, combine the initial values ​​set by the previous feeding device control program, reduce the initial value if the feeding speed exceeds the set value, increase the initial value if the feeding speed is lower than the set value, and finally determine the feeding speed control parameters for each group of feeding devices. S5. Set the interval time for rapid advance of the feeding device in the control program to 2.5s; S6. Set the interval time for the slow retraction of the feeding device in the control program to 3.2s; S7. Combining the feeding speed control parameters of S5 and S6 with the DB22 background data block variables, set all group feeding devices to the variables corresponding to DB22; S8. Draw the feeder parameter modification window and screen in the human-machine interface. The window variables also directly call the DB22 data block variables. The screen directly displays the current feeder control parameter values ​​in decimal format. S9. When production conditions are adjusted, based on the on-site coal cake height data and the current feeding speed of the feeding device, open the corresponding feeding device window whose feeding parameters need to be modified through the HMI screen, enter the target data using the virtual keyboard, and press the Enter button to complete the parameter modification.

2. The method for precise material distribution using the SCP machine feeding device according to claim 1, characterized in that: The variable table established within the DB22 block has addresses starting from DBD0 and sequentially ordered to DBD44, with a total of n variables. Each group of variables corresponds to a feeding device control parameter.

3. The method for precise material distribution using the SCP machine feeding device according to claim 1, characterized in that: The original assignment data of the feeding device control program is stored in the 0B22 background data block. The specific data stored is: DB22.DBD0=5.54E+01, DB22.DBD4=5.3E+01……DB22.DBD44=3.3E+01, until all n sets of data are assigned.

4. The method for precise material distribution using the SCP machine feeding device according to claim 1, characterized in that: The feeding speed control parameters of the n groups of feeding devices are determined based on the actual working conditions of tamping coal cakes on site, combined with the initial values ​​set in the previous feeding device control program. If the feeding speed exceeds the set value, the initial value is reduced; if the feeding speed is lower than the set value, the initial value is increased.

5. The method for precise material distribution using the SCP machine feeding device according to claim 1, characterized in that: Modify the original control programs of PF1-PF12, and replace the original control parameters of the n feeding device with the variables corresponding to DB22. Specifically, replace PF1, 5.54E+02 with DB22.DBD0, PF2, 5.64E+02 with DB22.DBD4, PF3, 5.34E+02 with DB22.DBD8, ..., PF12, 5.54E+02 with DB22.DBD44, until all n groups are replaced.

Images