CN201017231Y - Wet felt winding control device - Google Patents

Abstract

The utility model relates to a wet felt winding control device. Use PROFIBUS-DP field bus to complete the communication and control between the control level PLC S7, the field level Lenze 9326 frequency converter and the monitoring level HMIOP170B/DP, which constitute the monitoring level, control level and field level three of the wet felt winding control device level control structure. The real-time tension calculation module set in the PLC, and the coil diameter automatic real-time calculation module, multiplier module and torque control module set in the field-level inverter II and VI, and the calculation results are transmitted to the frequency conversion through the field bus Converter II or frequency converter VI to complete the quasi-constant torque control of wet felt winding. Accurate control is realized on the winding device, which improves the processing efficiency and output of various felt windings, increases the winding length, reduces the waste of leading felts, and reduces the cost. The utility model can be used in the winding control of wet felt production, weaving, papermaking and the like.

Description

Wet felt winding control device

technical field

The utility model belongs to the technical field of industrial control, and mainly relates to a winding control device, specifically a wet felt winding control device.

Background technique

At present, the control of winding is an important part in the industrial production of wet-laid felt. Winding control devices are also widely used in industrial fields such as textiles and papermaking. Many enterprises adopt Siemens S5PLC for production control. With the advancement of time and the rapid development of the electronic technology field, the Siemens control system S5PLC used in the original imported wet-laid felt winding equipment has been discontinued and eliminated, and its spare parts cannot be purchased. Moreover, there are still some problems with the original winding equipment, such as the original I and II reel diameters are inconsistent, the transition period for changing the type to adjust the winding parameters is long, the winding is not tight and uneven, and the felt needs to be frequently pulled when changing the winding. top priority. As a result, the ineffective operation time in the production process is too long, which affects the output, and the winding process is often interrupted, so that the length of the felt roll is not long enough, and it also causes waste of felting, poor winding quality, and low productivity. In the absence of a new control device connected to the general equipment, it is difficult for imported wet-laid felt winding equipment to meet the needs of high-quality winding work.

The utility model project team searched domestic and foreign patent documents and published periodical papers, and found no reports or documents closely related to the utility model.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the above-mentioned technologies and equipment in view of the current state of the art, to provide a control that is highly targeted, can perform real-time detection, calculation and control in the production process, and can realize quasi-constant torque control. It is a wet-laid felt winding control device with high cost performance, fast control speed, good winding quality, reduced waste, and improved productivity.

The technical solution is described in detail below:

The realization of the utility model is: as a wet felt winding control device, it is composed of monitoring level, control level and field level. The frequency converter and its peripheral execution equipment and auxiliary equipment are characterized in that: the monitoring level is composed of man-machine interface HMI OP170B/DP and NE212 counter, and the control level adopts Siemens PLC S7314C-2DP and four 16DI/DO modules; The 4 frequency converters in the field level all use Lenze frequency converters, that is, Lenze frequency converters. The PROFIBUS-DP field bus is used to connect with the RS-422 standard interface between the monitoring level and the control level for communication and control; the control level and the control level The field level is also connected by PROFIBUS-DP field bus. The field bus is respectively connected to the inverter II and the inverter VI through two Lenze 2133IB interface modules, and communicates and controls through the process channel and the parameter channel. The inverter II and the inverter VI is Lenze9326; frequency converter III is Lenze 8215, and the digital input/output terminal DI/DO of the control level is directly connected to frequency converter III for control; frequency converter I also uses Lenze 9326, and its linear speed is determined by the variable frequency motor in the drying section Provided to realize the speed following of the winding section and the drying section, the inverter I is directly connected to the control terminals of the inverter II and the inverter VI, and transmits the line speed to the inverter II or the inverter VI in real time. The frequency conversion motor in the drying section of the production line is the equipment in the front-end production line of the winding device controlled by the utility model.

In the industrial field of production and processing of wet-laid felt, many enterprises adopt German imported wet-laid felt winding control device. With the passage of time and the rapid changes in science and technology and manufacturing technology, the Siemens S5PLC used in the wet-laid felt winding control device imported from Germany has been discontinued and eliminated, and its spare parts cannot be purchased, and the original winding device also has some problems, such as The diameters of the two reels I and II of the original winding equipment are inconsistent. When changing the processing type, it is necessary to adjust the winding parameters for a long transition period. Felt requires frequent manual feeding of the felt head, which prolongs the time, reduces production efficiency, and cannot automatically adjust the quasi-constant torque control of winding. In order to solve these problems, the utility model adopts advanced Siemens S7PLC to form a new control device. The solution is to use S7314C-2DP and four digital input/output modules SM323 (16DI/16DO). S7314C-2DP is a compact CPU with built-in 24DI/16DO, 4AI/2AO, with integrated function MPI, PROFIBUS DP master/slave interface, choosing it can save one PROFIBUS DP communication module, two digital input/ output modules and an analog input/output module. In addition, the operator panel HMI OP170B/DP was selected to replace the original operator panel OP17. OP170B/DP is a large panel with 4-color display, which can support simplified Chinese display and can be used as a secondary master station to communicate with PLC through PROFIBUS DP field bus , and these functions are not available in the original OP17; the utility model also uses the advanced PROFIBUS DP field bus network of Siemens Company to replace the original CAN system bus to complete the communication and control functions. The improved wet-laid felt winding control device not only has high speed and good performance, but also has high cost performance, and solves the problems existing in the original winding device. Usually, the control level of a certain company is used, and the frequency converter of the company is also used at the field level, but the utility model adopts the frequency converter of Lenze Company, and cooperates with Siemens S7PLC to facilitate the realization of quasi-constant torque control , more suitable for the requirements of winding device control.

The realization of the present utility model also lies in: a real-time tension calculation module is set in the S7PLC of the control level, an automatic real-time calculation module and a multiplier module of the coil diameter are installed in the frequency converter II and the frequency converter VI of the field level, and the coil diameter is automatically real-time The calculation result of the calculation module is transmitted to the real-time tension calculation module through the PROFIBUS-DP field bus, and the result of the real-time tension calculation module is transmitted to the inverter II or VI through the PROFIBUS-DP field bus, and the result of the coil diameter real-time calculation module is multiplied Multiplied by the inverter module, and then passed to the inverter II or VI installed with the torque control module to complete the quasi-constant torque control of wet felt winding.

The utility model relates to hardware type selection, structural design, hardware installation, control system and communication. The specific scheme is to adopt the PLC S7 of Siemens Company and the frequency converter of Lenze Company, and adopt the process channel and parameters of PROFIBUS-DP field bus channel to realize communication and control between them; a real-time tension calculation module is set in the control level, and an automatic real-time calculation module for roll diameter, a multiplier module and a torque control module are set in the inverter II and VI, which realizes The quasi-constant torque control technology scheme for wet felt winding realizes advanced and precise control on the basis of the original equipment. This variable tension quasi-constant torque control mode with automatic calculation of coil diameter is suitable for various felts The tight and neat winding of the product improves productivity and winding quality, and saves freight and packaging costs.

The utility model has a high cost performance, and the upgraded operating practice proves that it is suitable for the winding control of various felt products, can reduce the phenomenon of felt breaking, improve the effective working time and output, increase the winding length, and reduce the number of felts. It reduces waste, saves freight and packaging costs, improves productivity and winding quality, and can achieve significant direct economic benefits. The utility model can be used in similar control devices for wet-process felt production, weaving, papermaking and the like.

Description of drawings:

Fig. 1 is a composition schematic diagram of the utility model;

Fig. 2 is a schematic diagram of quasi-constant torque control mode of the present invention;

Fig. 3 is the tension-reel diameter curve figure of the utility model;

Fig. 4 is the operating platform photo of the monitoring level of the utility model;

Fig. 5 is a photo of the embodiment of the utility model when the reel 1 and the reel 2 are changed.

Detailed ways:

Below in conjunction with accompanying drawing, the structure of the utility model and working process are described in further detail.

Embodiment 1: As shown in Figure 1, Figure 1 is a schematic diagram of the composition of the utility model, that is, a schematic diagram of the structure of the wet felt winding control device and the connection of various parts, which can illustrate the composition and work of the winding control device process. This wet-laid felt winding control device consists of three levels: monitoring level, control level and field level. In the figure, the monitoring level is composed of man-machine interface HMI OP170B/DP and NE212 counter, as shown in Figure 4. The control level adopts PLC S7314C-2DP and four 16DI/DO modules of Siemens; the field level adopts four (Lenze) Lenze frequency converters and their peripheral execution equipment and auxiliary equipment, and the control level and field level use PROFIBUS- The DP field bus is connected with two Lenze 9326 inverters II and Lenze 9326 inverter IV through two Lenze 2133IB interface modules for communication and control, and the Lenze 8215 inverter III is directly controlled by the control level through the digital input/output DI/DO Take control. The PROFIBUS-DP field bus is used between the monitoring level and the control level to connect through the RS-422 standard interface for communication and control. Production line products, glass fiber mats of different thicknesses (such as printed circuit board substrates) continuously enter the winding device through the frequency conversion motor in the drying section on the left side of the dotted line in Figure 1. The frequency conversion motor in the drying section of the production line is the equipment in the front production line of the winding device controlled by the utility model. Lenze 9326 frequency converter I drives the sandpaper roller to pull the felt material away from the steel mesh belt in the drying section to realize the speed following of the winding section and drying section (the linear speed of the commonly used felt is 50-70 m/min), and then by Adjust the position of the moving roller of the elastic frame, and wind it with a certain tension on the reel 1 driven by the Lenze 9326 inverter II. In the figure, the Lenze 8215 inverter III drives the reel changing operation to complete the reel changing operation. When the felt product rolled on the reel 1 driven by the Lenze 9326 inverter II reaches the preset length, the reel 2 and the reel 1 driven by the Lenze 9326 inverter IV are exchanged, and the Lenze 8215 inverter III drives the exchange. The reel rotates clockwise at a low speed, and reel 1 and reel 2 begin to shift positions, as shown in Figure 5, which is a photo of the embodiment when reel 1 and reel 2 are changing rolls. When reel 1 reaches the unloading position, reel 2 is just right When the machine reaches the winding position, the NE212 counter on the console will send out a felt cutting signal. After the felt is cut off by the cutter, the new felt head will be wound on the reel 2 with the adhesive tape on it. The reel 1 will stop working and complete a replacement automatically volume operations. Thereafter, the rolled felt roll can be unloaded. When the felt roll of the reel 2 driven by the 9326 inverter IV reaches the required length, the counter sends out a roll change signal again to perform a new round of roll change operation. The process is the same as above, and this cycle can be unloaded after about 20 minutes. A rolled felt roll with a length of about 1,200 meters is packaged as a finished product for sale. As shown in Figure 1, in addition to the variable frequency motor (2.2KW) driven by the Lenze 8215 inverter III, the other three dedicated frequency conversion motors driven by the Lenze 9326 inverter all have speed feedback rotary encoders to form a closed-loop control of the speed; To prevent the motor from running at low speed for a long time, a mechanical gearbox is installed between the reel motor and the reel. The variable-frequency special motors driven by Lenze 9326 inverters are 7.5KW (driven by 9326 inverter I) and 11KW (driven by 9326 inverter II and 9326 inverter IV respectively). Lenze 9326 frequency converter I main speed reference signal X6/1, 2 comes from the variable frequency motor on the left of the dotted line in Figure 1, and its speed signal is sent to X6/1, 2 terminals after a certain ratio conversion, representing its linear speed. See Figure 1, the auxiliary speed given signal X6/3, 4 of 9326 inverter I comes from the resistance value of the non-contact rheostat R determined by the position of the elastic frame moving roller, after conversion, it is synthesized with the main speed given signal, and passed through the closed loop PI Adjust and control the speed of the frequency conversion motor driven by 9326 frequency converter I to achieve the same linear speed as the frequency conversion motor on the left side of the dotted line, and at the same time apply the tension set by the elastic frame to the felt. The actual rotational speed follows the speed given synthesis signal and cascades from the digital frequency output X10 port to the digital frequency input port X9 of 9326 inverter II and 9326 inverter IV to apply speed control. It can be seen from the foregoing and Figure 5 that only one of the 9326 inverter II and the 9326 inverter IV is in the working state during winding, and the two should apply the same control to the motor during operation, so the following embodiments of the control mode of the 9326 inverter are only The 9326 inverter II is in working condition, and under the same circumstances, a new embodiment can be formed by replacing the 9326 inverter II with the 9326 inverter VI. The same is true for the following examples. For simplification, new implementations will not be listed here. example.

The control level in Fig. 1 is S7PLC equipment, which uses Siemens products. Among them, the CPU is S7314C-2DP, which is a compact CPU with 48k main memory, 24VDC power supply, built-in 24DI/16DO, 4AI/2AO, with integrated function MPI, PROFIBUS DP master/slave interface, it can be selected Save one PROFIBUSDP communication module, two digital input/output modules and one analog input/output module, and also select 4 digital input/output modules, all of which are 16DI/16DO. The monitoring-level operator panel uses HMI OP170B/DP to replace the operator panel OP17 before the upgrade. OP170B/DP is a large panel with 4-color display, which can support simplified Chinese display and can be used as a secondary master station and PLC. PROFIBUS DP bus communication, and these functions are not available in the original OP17. The NE212 at the monitoring level accepts the sensing signal sent by the length counter, and displays the length of the rolled felt product of this roll. When the length of the ordered felt roll (input setting) is still 50 meters, NE212 sends a roll change operation signal to S7PLC to start the roll change operation. , NE212 sends a felt cutting switch signal to S7PLC, the cutter will cut the felt, and the new felt head will be wound on the new reel with adhesive tape, so that the length of the felt roll ordered by the customer can be guaranteed.

The wet-laid felt winding control device uses Siemens' advanced PROFIBUS DP field bus network to replace the CAN system bus before the upgrade to complete system communication and control functions. This is because, firstly, the CAN bus interface module dedicated to PLC S7 is not easy to purchase, and the price of third-party products is high, and the quality is difficult to guarantee; secondly, PROFIBUS DP has the advantages of fast transmission speed and easy network expansion compared with CAN system bus. In order to use PROFIBUS DP to communicate with Lenze 9326 inverter 2 and 9326 inverter 4, two Lenze2133IB modules (PRIFIBUS DP communication modules) were selected to communicate with their process channel and parameter channel.

Embodiment 2: Refer to FIG. 2, which shows the realization of the variable tension quasi-constant torque control mode with automatic calculation of coil diameter. The overall scheme of this embodiment is the same as that of Embodiment 1. In order to improve the winding quality, a real-time tension calculation module is provided in the S7PLC at the control level, and an automatic real-time calculation module for coil diameter is installed in the inverter II and VI at the field level. And the multiplier module, the calculation result of the coil diameter automatic real-time calculation module is transmitted to the real-time tension calculation module through the PROFIBUS-DP field bus, and the result of the real-time tension calculation module is transmitted to the inverter II or the inverter VI through the PROFIBUS-DP field bus, and The result of the coil diameter real-time calculation module is multiplied by the multiplier module, and then transmitted to the inverter II or VI installed with the torque control module to complete the quasi-constant torque control of wet felt winding. During winding, as the winding diameter increases (the result is calculated in real time by the automatic real-time calculation module of the coil diameter), the tension gradually decreases (determined by the calculation formula in the real-time tension calculation module), so that during the winding process The quasi-constant torque control mode in which the product of winding diameter and tension is close to a constant value is suitable for winding various felt products.

Embodiment 3: see Fig. 3, Fig. 3 is tension-spool diameter curve. According to the capacity of the equipment, it is stipulated that the initial diameter of reel 1 and reel 2 is 86mm and 150mm, and the maximum diameter of the reel after it is fully rolled is 1200mm. , Figure 4 is a photo of the monitoring console of the winding control system. The console has a total of 21 switches and buttons, which are used for manual control and protection (such as emergency stop) respectively, and can be used for automatic operation without failure. There is a keyboard on the lower part of the operation panel HMI OP170B/DP, and the operator can set the initial reel diameter and other data on the panel. In order to ensure that the various felt products that are rolled can be rolled tightly and neatly, the quasi-hyperbola F in Fig. 3 is selected in this embodiment. A, B, C, D, and E in Fig. 3 are all straight lines, and the experimental results will be described with examples later.

As Example 3, we let the tension decrease gradually as the winding diameter increases during winding. Set the initial tension to 2600N (Newton), which is 80% of the per unit value (after the upgrade of the winding control device, the initial tension can be set to exceed 100% due to the cancellation of the restriction on the initial tension, which can be set by the operator on the operation panel HMI OP170B/ Input the settings on the DP, and adjust according to different types of felt products, and obtain appropriate empirical data in practice) When the roll is full, the tension can be adjusted to drop to the range of 6% to 45% (the operator can adjust the tension according to different types of felt products) In the following (1) formula, it is realized by changing the taper value of V _taper by panel setting, and obtaining appropriate empirical data in practice), so that the product of coil diameter and tension is close to a constant value during the winding process, and a quasi-constant rotation is obtained torque control. At this time, the winding effect of various products is better, which improves the product productivity. In order to realize the form of curve F in Figure 3, the calculation of given tension is completed by the real-time tension calculation module of PLC, and the result is sent to 9326 inverter II (or 9326 inverter through AIF-IN.W1 of PROFIBUS DP process channel IV), and then multiplied by the real-time calculated result by the automatic real-time calculation module of the roll diameter, and then passed to the torque control module installed in the 9326 inverter II (or 9326 inverter IV), and the real-time tension calculation module of the PLC The calculation formula is used to realize the quasi-torque control mode (as shown in Figure 2).

The tension given calculation formula in the real-time tension calculation module of PLC is:

F _gi ＝F _set [V _taper +(1-V _taper )D _min /D]——(1)

In the formula, F _gi is the given tension (%). F _set is the manual tension setting (%) on the operation panel, generally set to 2600N, which is 80%. V _taper is the taper value, which can be manually set by the panel. D _min is the minimum roll diameter, that is, the initial roll diameter (86 or 150 mm two specifications). D is the real-time coil diameter calculated by the coil diameter automatic real-time calculation module in Lenze 9326 inverter II (or 9326 inverter IV), which is transmitted to the tension calculation module of PLC in real time through the PROFIBUS DP process channel.

It can be seen from the calculation formula that as the actual winding diameter gradually increases during the winding process, the given tension value calculated by formula (1) decreases gradually, so that the product of the winding diameter and tension is close to constant during the winding process. value, a quasi-constant torque control is obtained. The degree of reduction of the given tension value, that is, the shape of the curve F in Figure 4, can be adjusted by the taper value manually set on the operation panel. In this way, the variable tension quasi-constant torque control mode with automatic calculation of coil diameter is realized. Operation practice has proved that it is suitable for winding control of various felt products, can reduce felt breakage, increase operating time and output, increase winding length, reduce waste of felt, save freight and packaging costs, and improve productivity and volume. Remarkable direct economic benefits can be obtained by focusing on quality.

Embodiment 4: Referring to Fig. 3, this embodiment selects the straight line A in Fig. 3, which indicates that the tension remains constant as the winding diameter increases during winding. This only needs to change the calculation formula (1) given by the tension in the real-time tension calculation module of PLC to:

F _gi = F _set —— (2)

In the formula, F _gi is the given tension (%). F _set is the artificial tension setting (%) of the operation panel, generally set to 2600N, that is, 80%.

The rest of the controls and settings are the same as in Example 1. Since the tension remains constant during winding, as the winding diameter increases, the product of the winding diameter and the tension, that is, the torque increases gradually, which determines that the felt roll is wound tighter and tighter. Theoretically, the same Long felt rolls should be wound tighter, that is, the felt roll product has a small diameter, which is exactly what we need. However, in fact, it is difficult to keep the end face of the felt roll product flat during the winding process, and even the felt roll is wound into a spindle shape (commonly known as a shell), which has a high scrap rate and is eliminated after application.

Embodiments 5 to 8: In the tension-reel diameter curves in Fig. 3, the realization of straight lines B, C, D and E are respectively selected as Embodiments 5 to 8, and the rest of the control and settings are the same as in Embodiment 1, only need to be changed respectively The calculation formula (1) given by the tension in the real-time tension calculation module of PLC.

Embodiment 5 selects the straight line B in the tension-spool diameter curve of Fig. 3 for use, and the calculation formula (1) given by the tension is changed into:

F _gi ＝-50% F _set D+F _set ——(3)

Embodiment 6 selects the straight line C in the tension-reel diameter curve of Fig. 3, and the given calculation formula (1) of the tension is changed to:

F _gi ＝-20% F _set D+F _set ——(4)

Embodiment 7 selects the straight line D in the tension-spool diameter curve of Fig. 3 for use, and the calculation formula (1) given by the tension is changed into:

F _gi ＝-80% F _set D+F _set ——(5)

Embodiment 8 selects the straight line E in the tension-reel diameter curve of Fig. 3 for use, and the calculation formula (1) given by the tension is changed into:

F _gi ＝-10% F _set D+F _set ——(6)

In the above formulas (3) to (6), F _gi is the tension setting, F _set is the manual tension setting of the operation panel, D is the actual coil diameter calculated by the automatic real-time calculation module of the coil diameter in the Lenze 9326 inverter, Both are calculated using per unit value.

In Examples 5 to 8, the winding quality of the felt is not as good as that of Example 3, mainly due to the poor consistency of the winding quality and the poor adaptability to different types of felt products. In fact, they are not suitable for use.

Comparing Embodiments 3 to 8, Embodiment 3 is the preferred best embodiment of the present invention.

Adopting the best embodiment of the utility model to control the production process of wet felt winding makes the outdated equipment full of vitality. The operation practice proves that the operation efficiency and output can be improved, the winding length can be increased, and the waste of felt can be reduced. Save freight and packaging costs, with high cost performance. It is also suitable for various felt products, improving productivity and winding quality. The utility model can be used in similar control devices for wet-process felt production, weaving, papermaking and the like.

Claims (2)

1. wet method felt coiling control device, constitute for three grades by monitoring level, controlled stage and field level, monitoring level is an operator's console, controlled stage mainly is made of Programmable Logic Controller, field level adopts frequency converter and peripheral actuating equipment and utility appliance thereof to constitute, it is characterized in that: monitoring level is made up of man-machine interface HMI OP170B/DP and NE212 counter, and controlled stage adopts PLC S7 314 C-2DP and 4 16DI/DO modules of Siemens Company; 4 frequency converters in the field level are all selected Lenze's frequency converter for use, and promptly the Lenze frequency converter adopts the PROFIBUS-DP fieldbus to connect by the RS-422 standard interface between monitoring level, controlled stage, communicates and controls; Also adopt the PROFIBUS-DP fieldbus to connect between controlled stage and the field level, fieldbus directly is connected with frequency converter VI with frequency converter II respectively by two Lenze 2133IB interface modules, communicate and control with process channel and parameter channel, frequency converter II and frequency converter VI are Lenze 9326; Frequency converter III is Lenze 8215, and controlled stage numeral I/O end is directly connected to frequency converter III and controls; Frequency converter I also adopts Lenze 9326, its linear velocity is provided by the variable-frequency motor of production line oven dry workshop section, the speed of coiling workshop section and oven dry workshop section that realizes is followed, and frequency converter I directly is connected with the control end of frequency converter VI with frequency converter II, and linear velocity is passed to frequency converter II or frequency converter VI in real time.

2. wet method felt coiling control device according to claim 1, it is characterized in that: in the S7 of controlled stage PLC, be provided with real-time tension force computing module, automatically real-time computing module of coil diameter and multiplication module are installed among Ji frequency converter II and the frequency converter VI at the scene, the result of calculation of the automatically real-time computing module of coil diameter is passed to real-time tension force computing module by the PROFIBUS-DP fieldbus, the result of tension force computing module passes to frequency converter II or frequency converter VI by the PROFIBUS-DP fieldbus in real time, multiply each other through multiplication module with the result of the real-time computing module of coil diameter, pass to frequency converter II or frequency converter VI that the torque control module is installed again and finish the accurate permanent torque control that the wet method felt is reeled.

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