CN114939975A - Wall thickness calculation method for insulation pipe winding production line and program control system thereof - Google Patents
Wall thickness calculation method for insulation pipe winding production line and program control system thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/566—Winding and joining, e.g. winding spirally for making tubular articles followed by compression
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92085—Velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
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- B29C2948/9218—Weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92333—Raw material handling or dosing, e.g. active hopper or feeding device
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- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
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Abstract
The invention relates to the technical field of processing control of a heat-insulating pipe, and discloses a wall thickness calculation method for a heat-insulating pipe winding production line and a program control system thereof, wherein the method comprises the following steps of S0: powering up a system, initializing a program, and adjusting set parameters; step S1: acquiring and processing acquired data in real time, wherein the acquired data comprises the weight of a hopper, the advancing distance of a heat preservation pipe, the frequency of a tractor and the rotating speed of an extruder; step S2: calculating management data according to the acquired data, and controlling feeding according to a feeding control strategy; step S3: the operator controls the tractor frequency and the extruder speed according to the management data. According to the invention, the real-time value of the weight of the hopper is acquired, the advancing distance of the heat-insulating pipe is acquired in real time through the laser range finder, and the real-time display of the polyethylene wall thickness in the production of the heat-insulating pipe is realized through program processing, so that workers are guided to produce, and the production quality of the heat-insulating pipe is ensured.
Description
Technical Field
The invention relates to the technical field of processing control of a heat-insulating pipe, in particular to a wall thickness calculation method of a heat-insulating pipe winding production line and a program control system thereof.
Background
With the rapid development of society, the insulating pipe has been commonly used in the laying of building, heat supply, water supply pipeline, has guaranteed that municipal pipe network operation is normal and unobstructed. The insulating tube polyethylene outer jacket as the major structure layer needs to have outstanding resistance to external force, prevents that the heat preservation from entering moisture before the installation, gets into water in installation and the use to reduce the heat loss of heat preservation, prolong the life of insulating tube.
In the production line of winding polyethylene on the heat preservation pipe, an extruder is used for extruding molten polyethylene tapes to wind on the outer wall of the polyurethane layer outside the steel pipe, and the extruder is a screw extruder. The wall thickness of the heat preservation pipe in the process is an important factor for measuring the quality of the heat preservation pipe.
In the existing heat preservation pipe winding production line, most wall thickness values are processed according to set values, output equipment cannot be guided or adjusted in real time, and the measurement accuracy is to be improved so as to reduce the reject ratio of the heat preservation pipe.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a wall thickness calculation method for a winding production line of a thermal insulation pipe and a program control system thereof, which are used for realizing automatic measurement of the wall thickness of polyethylene in the production of the thermal insulation pipe, so that workers are guided to produce the thermal insulation pipe, and the production quality of the thermal insulation pipe is ensured.
In order to achieve the above purpose, the invention provides the following technical scheme:
a wall thickness calculating method for a winding production line of a thermal insulation pipe comprises the following steps of S0: electrifying the system, initializing a program, and adjusting set parameters, wherein the set parameters comprise but are not limited to the outer diameter of the heat-insulating pipe after spraying, the density of polyethylene, the upper and lower limits of the measuring range of the sensor, the laser position and the set value of the length of the pipe;
step S1: acquiring collected data in real time and performing data conversion processing, wherein the collected data comprises the weight of a hopper, the advancing distance of a heat preservation pipe, the frequency of a tractor and the rotating speed of an extruder;
step S2: starting a feeding timer when the production is started, controlling feeding according to a feeding control strategy, and calculating management data according to the collected data after the feeding timer is stopped;
wherein the management data comprises a polyethylene wall thickness value, and the calculation formula is as follows:
wherein T is the thickness value of the polyethylene wall, DeltaM is the polyethylene material in the time interval Deltat, the outer diameter of the heat-preservation pipe after spraying, rho is the density of the polyethylene, and DeltaL is the advancing distance of the heat-preservation pipe in the time interval Deltat.
In the invention, furthermore, the method also comprises
Step S3: the operator controls the tractor frequency and the extruder speed according to the management data.
In the present invention, further, the management data includes pipe conveying speed, discharging speed, winding position, single pipe material usage and yield.
In the present invention, further, the feed control strategy comprises
And starting a feeding timer, judging whether the material level is lower than a valve opening set value according to the obtained weight of the hopper, stopping feeding timing and starting an electromagnetic valve to feed when the material level is lower than the valve opening set value, and controlling the electromagnetic valve to close feeding when the material level is higher than a valve closing set value.
In the present invention, the step S1 further includes determining whether the hopper weight is lower than a lower alarm threshold according to the processed data, and if so, starting an audible and visual alarm, where the lower alarm threshold is smaller than a set valve closing value.
In the invention, further, the data processing process comprises
Acquiring an acquisition value a;
converting the acquired value a into b through analog-to-digital conversion, and calculating a data display value M, wherein the calculation formula of the data display value M is as follows:
wherein c is the upper limit value of the measuring range set by the sensor, and d is the lower limit value of the measuring range set by the sensor.
In the present invention, further, the winding position is calculated by:
L1＝L2-(S-L)
wherein, L1 is the winding position, L2 is the moving distance value of the heat preservation pipe, S is the set laser position, and L is the set pipe length value.
In the invention, further, the method for obtaining the single tube material comprises the following steps:
obtaining the material initialization value K 0 ；
Judging whether the hopper stops feeding, if so, recording a first weight value M1 of the hopper at the moment and starting an extrusion timer;
judging whether the hopper starts to feed, if so, recording a second weight value M2 of the hopper at the moment, and reading the time of an extrusion timer, namely a time interval delta t;
calculating the polyethylene material delta M and the discharging speed V, and starting a feeding timer;
judging whether the hopper stops feeding, if so, reading the time of a feeding timer at the moment to be delta t, and calculating the single-pipe material K, wherein K is delta M + V delta t' + K 0 。
In the present invention, preferably, the alarm lower threshold is smaller than the valve-closing setting value.
A program control system for a winding production line of an insulating pipe comprises
The equipment layer at least comprises a laser range finder, a weighing sensor, an electromagnetic valve and production equipment, wherein the laser range finder is used for measuring the moving distance of the heat preservation pipe, and the weighing sensor is used for measuring the weight of the hopper;
the control layer comprises a PLC, the PLC adopts the wall thickness calculation method of the insulating tube winding production line according to any one of claims 1 to 9, the wall thickness calculation method is used for calculating the management data, the collected data and the management data are displayed on a remote operation screen in an optical fiber Ethernet communication mode, and an operator monitors the production condition of the insulating tube through the operation screen and remotely controls production equipment.
The management layer, the management layer includes thing networking cloud platform and mobile terminal, PLC pass through wireless transmission module with the thing networking cloud platform carries out data transmission, and the user of authorization passes through mobile terminal and monitors, browses, downloads historical data the whole of insulating tube production technology.
In the present invention, preferably, the control layer further includes an audible and visual alarm for prompting the fault information of the operator.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the advance distance of the heat-insulating pipe is obtained in real time by acquiring the real-time value of the weight of the hopper and the laser range finder, and the real-time display of the polyethylene wall thickness in the production of the heat-insulating pipe is realized by program processing, so that workers are guided to produce, and the production quality of the heat-insulating pipe is ensured. The feeding of the hopper is controlled by controlling the electromagnetic valve, so that the weighing system is in a relatively stable and ideal measuring state. The material consumption in unit time is calculated by setting the size and material density of the product, and parameters such as pipe conveying speed, extruder screw rotating speed, material discharge speed and the like are displayed through a human-computer interaction interface to guide an operator to adjust all parameters in production at any time, so that the thickness of the outer sleeve of the heat-insulating pipe is controlled, and the product quality is improved.
Meanwhile, the device has an alarm function, when the hopper is lower than the alarm lower limit, the device can prompt an operator to immediately process the fault, and loss is avoided. The system is provided with an automatic blanking program, realizes the accurate control of the blanking process, processes the acquired data, and calculates the discharge amount and the discharge speed so as to guide the production of operators.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a control logic general diagram of a wall thickness calculation method of a winding production line of a heat preservation pipe according to the invention;
FIG. 2 is a sensor data processing flow chart in the wall thickness calculation method of the thermal insulation pipe winding production line according to the invention;
FIG. 3 is a schematic diagram of a material level alarm flow in the wall thickness calculation method of the insulation pipe winding production line of the invention;
FIG. 4 is a schematic view illustrating a process of weight peeling of a hopper in the method for calculating the wall thickness of the insulated pipe winding line according to the present invention;
FIG. 5 is a schematic flow chart of a feeding control strategy in the wall thickness calculation method of the insulated pipe winding production line according to the present invention;
FIG. 6 is a schematic view of the process design of the insulating tube processing process in the wall thickness calculation method of the insulating tube winding production line of the present invention;
FIG. 7 is a schematic flow chart of a yield calculation method in the wall thickness calculation method of the insulation pipe winding production line of the present invention;
FIG. 8 is a schematic flow chart of a method for acquiring single tube materials in the method for calculating the wall thickness of the winding production line of the thermal insulation tube according to the invention;
FIG. 9 is a schematic diagram of the network design of the program control system of the thermal insulation pipe winding production line of the present invention;
FIG. 10 is a schematic view of a touch screen interface of a thermal insulation pipe winding production thread control system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a preferred embodiment of the present invention provides a method for calculating a wall thickness of a winding production line of an insulating pipe and a program-controlled system thereof, which are used to automatically measure a polyethylene wall thickness during production of the insulating pipe, so as to guide workers to produce the insulating pipe and ensure the production quality of the insulating pipe.
A wall thickness calculation method for a winding production line of a heat preservation pipe comprises the following steps
Step S0: electrifying the system, initializing a program, and adjusting set parameters, wherein the set parameters comprise but are not limited to the outer diameter of the heat-insulating pipe after spraying, the density of polyethylene, the upper and lower limits of the measuring range of the sensor, the laser position and the set value of the length of the pipe;
step S1: acquiring collected data in real time, and processing the data to convert the data, wherein the collected data comprises the weight of a hopper, the advancing distance of a heat preservation pipe, the frequency of a tractor and the rotating speed of an extruder;
step S2: starting a feeding timer when the production is started, controlling feeding according to a feeding control strategy, and calculating management data according to the collected data after the feeding timer is stopped;
step S3: the operator controls the tractor frequency and the extruder speed according to the management data.
Firstly, after the system is started, program initialization is firstly carried out, the system can automatically keep parameter setting of the last operation after initialization, and an operator can directly adjust parameters to be changed according to the production requirement, wherein the parameters to be set in the production comprise the outer diameter of a thermal insulation pipe after spraying, the density of polyethylene, the upper and lower limits of the range of a sensor, the laser position, the set value of the pipe length, the set value of the lower limit of an alarm, the set value of a switch valve and the like.
And then, data acquisition is carried out, most of the data in the scheme is measured by corresponding sensors, for example, the weight of the hopper is measured by a weighing sensor, the advancing distance of the heat preservation pipe is measured by a laser range finder, and the frequency of the tractor and the rotating speed of the extruder are measured by corresponding sensors (such as a photoelectric sensor) and used as input parameters to provide guarantee for subsequent calculation.
Specifically, based on the above embodiment, because external factors such as jitter exist during measurement of the sensor, signals of the sensor are filtered by the filtering device, the filtering device has good common-mode and differential-mode rejection functions, interference of continuous and indirect pulses around the control system on signal collection is suppressed, and normal and accurate signal collection is ensured. As shown in FIG. 2, the specific data processing procedure includes
Acquiring an acquisition value a;
converting the acquired value a into b through analog-to-digital conversion, and calculating a data display value M, wherein the calculation formula of the data display value M is as follows:
wherein c is the upper limit value of the measuring range set by the sensor, and d is the lower limit value of the measuring range set by the sensor.
Therefore, the displayed numerical value is more accurate and reasonable.
In addition, it should be noted that the weight of the hopper is measured by a load cell, and the real-time value of the weight of the hopper is a calculated value after the hopper is peeled, and referring to fig. 4, the specific peeling principle is as follows: when no material is in the hopper, the peeling function can be realized by clicking the peeling button, the tare weight can be displayed, and the weight of the hopper after filling is displayed as the weight after peeling. When the user clicks 'cancel peeling', the 'tare weight' position is displayed as '0', and the weight of the hopper is the total weight of the hopper and the material.
In the present invention, as shown in fig. 3, the step S1 further includes determining whether the weight of the hopper is lower than a lower alarm threshold, and if so, starting an audible and visual alarm, so as to prevent the production quality of the thermal insulation pipe from being affected by the fact that the material level is too low and the material cannot be discharged. And the alarm lower limit threshold is smaller than a valve closing set value. And judging whether the alarm confirmation button is pressed or not, and if so, turning off the sound alarm.
Concretely, this scheme possesses alarming function, is less than warning lower limit threshold value when the hopper, can indicate operating personnel to handle the trouble immediately, avoids causing the loss. And the alarm lower limit threshold is smaller than the valve closing set value so as to avoid false alarm.
In another embodiment provided by the invention, the automatic alarming device further comprises an alarm allowing button which can be selected according to requirements to judge whether the alarm is allowed or not, when the alarm allowing button displays green, the audible and visual alarm can be started when the weight of the hopper is lower than the alarm lower limit threshold, and when the alarm allowing button is gray, the audible and visual alarm cannot be started even if the alarm is given. Therefore, the alarm method is suitable for noisy working conditions.
Furthermore, when the production is started, the collected data are obtained in real time and are converted, a feeding timer is started, feeding is controlled according to a feeding control strategy, and management data are calculated according to the collected data.
Based on the above example, referring to FIG. 5, the present scheme provides a feed control strategy comprising
And in an automatic state, starting a feeding timer, judging whether the material level is lower than a valve opening set value according to the obtained weight of the hopper, stopping feeding timing and starting an electromagnetic valve to feed when the material level is lower than the valve opening set value, and controlling the electromagnetic valve to close feeding when the material level is higher than a valve closing set value.
Meanwhile, in order to solve the problem of valve misoperation caused by instability of the weighing sensor, the electromagnetic valve is designed to be delayed for 1 second to judge starting and stopping.
In the present invention, further, as shown in fig. 6, the management data includes a polyethylene wall thickness value, a pipe conveying speed, a discharging speed, a winding position, a single pipe material usage, and a production volume. Meanwhile, the calculation of data such as single tube material consumption and yield can be used for digital production management, so that the yield is improved, and raw materials are saved. The calculation of the polyethylene wall thickness value is an important technical index for the research and development of the system, so that workers are guided to produce, and the production quality of the heat-insulating pipe is guaranteed. Meanwhile, the calculation of data such as single tube material consumption and yield can be used for digital production management, so that the yield is improved, and raw materials are saved.
Specifically, the management data includes a polyethylene wall thickness value, and the calculation formula is as follows:
wherein T is the thickness value of the polyethylene wall, DeltaM is the polyethylene material in the time interval Deltat, the outer diameter of the heat-preservation pipe after spraying, rho is the density of the polyethylene, and DeltaL is the advancing distance of the heat-preservation pipe in the time interval Deltat.
It should be noted that Δ t is the time interval from the closing of the solenoid valve to the opening of the solenoid valve, i.e., the time interval from the opening of the feed timer to the stop of the feed timer.
In the time interval Deltat, the rising edge and the falling edge of a feedback signal of the weight sensor are used for triggering and calculating a change value DeltaM (kg) of the weight M (kg), namely a polyethylene material DeltaM, and a change value DeltaL (mm) of an advancing distance value L2(M) of the heat preservation pipe, so that a pipe conveying speed V1(M/s) and a discharging speed V (kg/h) are calculated, and an operator is guided to control the equipment, namely the frequency of the tractor and the rotating speed of the extruder are adjusted.
Wherein the content of the first and second substances,
it should be noted that the Δ M of the polyethylene material is calculated in the following single-tube material.
In the present invention, specifically, the winding position calculation method includes:
L1＝L2-(S-L)
wherein, L1 is the winding position, L2 is the moving distance value of the heat preservation pipe, S is the set laser position, and L is the set pipe length value.
The set laser position is measured by a laser range finder.
In the present invention, specifically, as shown in fig. 7, the yield (root) calculation method:
initializing yield, judging whether the length of the heat preservation pipe is larger than the winding position and larger than 0, if so, the yield is equal to n +1, otherwise, the yield is equal to n;
and judging whether the yield is cleared or not, if so, the side yield is equal to 0, and otherwise, the yield is equal to n + 1.
In the present invention, specifically, as shown in fig. 8, the method for obtaining the single tube material comprises:
obtaining the material initialization value K 0 ；
Judging whether the hopper stops feeding, if so, recording a first weight value M1 of the hopper at the moment and starting an extrusion timer;
judging whether the hopper starts to feed, if so, recording a second weight value M2 of the hopper at the moment, and reading the time of an extrusion timer, namely a time interval delta t;
calculating the material consumption delta M and the discharging speed V of the polyethylene, and starting a feeding timer, wherein the delta M is M2-M1;
judging whether the hopper stops feeding, if so, reading the time of a feeding timer at the moment to be delta t, and calculating the single-tube material K, wherein K is delta M + V delta t' + K 0 ，
Based on the above embodiment, the present invention further provides a program control system for a thermal insulation pipe winding production line, as shown in fig. 9, including
The equipment layer, the equipment layer includes laser range finder, weighing sensor, solenoid valve and production facility at least, wherein, laser range finder is used for measuring insulating tube displacement, weighing sensor is used for measuring hopper weight, and the solenoid valve is pneumatic solenoid valve and is arranged in the feeding control of polyethylene batching, makes the solenoid valve coil produce the effect of electromagnetic force through changing the air current direction to promote the valve core and switch, realize the control of hopper feeding. The production equipment is mainly used for realizing the processing of the winding process of the heat preservation pipe.
And the control layer comprises a PLC (programmable logic controller), the PLC adopts Siemens S7-200 SMART PLC, and various touch screens and wireless transmission equipment can be integrated. The wall thickness calculating method for the thermal insulation pipe winding production line is adopted in the PLC and used for calculating the management data, displaying the collected data and the management data on a remote operation screen in an optical fiber Ethernet communication mode, and monitoring the production condition of the thermal insulation pipe and remotely controlling production equipment by an operator through the operation screen.
Specifically, as shown in fig. 10, functions of displaying real-time values of control system parameters, setting production recipes, browsing alarm information, and the like are provided for operators. And a domestic MCGS touch screen is selected, software and hardware authorization is integrated, and the system is low in cost, powerful in function and high in reliability.
According to the scheme, production operation basis is provided for operators in various modes such as animation display, alarm processing, flow control and report output through the acquisition and processing of field data. And the data transmission of the remote operation station is realized quickly by the communication between the Ethernet TCP/IP protocol and the PLC.
The wireless transmission module arranged in the PLC can access data in the system to the Internet, and functions of equipment state monitoring, data acquisition, storage, remote operation and maintenance and the like are realized by utilizing an advanced cloud technology, so that production investment is reduced, and product quality is improved.
The management layer, the management layer includes thing networking cloud platform and mobile terminal, PLC pass through wireless transmission module with the thing networking cloud platform carries out data transmission, and authorized user passes through the mobile terminal and the whole control of insulating tube production technology, browses, downloads historical data.
The management layer mainly aims at APP on a mobile terminal such as a mobile phone or a computer, and an authorized user can monitor the whole process of the process through a network computer or the mobile phone, browse and download historical data.
Therefore, the system can effectively control the polyethylene discharge amount, acquire real-time production data, monitor production equipment and monitor material consumption, monitor the field production condition by using the Internet of things technology, store production data and remotely diagnose fault equipment. The intelligent and networked production process of the heat preservation pipe is realized, the production flow is optimized, the product quality and the production efficiency are improved, and the production cost is reduced.
Based on the inventive concept of the present invention, in other preferred embodiments of the present invention, a readable storage medium is provided, which stores a computer program, and when the computer program is executed by a processor, the computer program causes the processor to execute the method for calculating the wall thickness of the insulated pipe winding production line according to the embodiment.
It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the protection scope of the claims of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other manners. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
It should be understood that the technical problems can be solved by combining and combining the features of the embodiments from the claims.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (10)
1. A wall thickness calculation method for a winding production line of a heat preservation pipe is characterized by comprising the following steps
Step S0: electrifying the system, initializing a program, and adjusting set parameters, wherein the set parameters comprise but are not limited to the outer diameter of the heat preservation pipe after spraying, the density of polyethylene, the upper limit and the lower limit of the range of the sensor, the position of laser, the set value of the length of the pipe, the set value of a valve opening and the set value of a valve closing;
step S1: acquiring and processing acquired data in real time, wherein the acquired data comprises the weight of a hopper, the advancing distance of a heat preservation pipe, the frequency of a tractor and the rotating speed of an extruder;
step S2: starting a feeding timer when the production is started, controlling feeding according to a feeding control strategy, and calculating management data according to the collected data after the feeding timer is stopped;
wherein the management data comprises a polyethylene wall thickness value, and the calculation formula is as follows:
wherein T is the polyethylene wall thickness value, DeltaM is the polyethylene material within the time interval Deltat, D 0 Rho is the polyethylene density, and Delta L is the advancing distance of the thermal insulation pipe in the time interval Delta t.
2. The method for calculating the wall thickness of the winding production line of the thermal insulation pipe as claimed in claim 1, further comprising
Step S3: the operator controls the tractor frequency and the extruder speed according to the management data.
3. The method for calculating the wall thickness of the winding production line of the thermal insulation pipe and the program control system thereof according to claim 2, wherein the management data comprises pipe conveying speed, discharging speed, winding position, single pipe material consumption and yield.
4. The method for calculating the wall thickness of the insulated pipe winding production line according to claim 1, wherein the feeding control strategy comprises
And starting a feeding timer, judging whether the material level is lower than a valve opening set value according to the obtained weight of the hopper, stopping feeding timing and starting an electromagnetic valve to feed when the material level is lower than the valve opening set value, and controlling the electromagnetic valve to close feeding when the material level is higher than a valve closing set value.
5. The method for calculating the wall thickness of the winding production line of the thermal insulation pipe as claimed in claim 4, wherein the step S1 further comprises determining whether the weight of the hopper is lower than a lower alarm threshold, and if so, starting an audible and visual alarm.
6. The method for calculating the wall thickness of the winding production line of the thermal insulation pipe and the program control system thereof according to claim 1, wherein the data processing process comprises
Acquiring an acquisition value a;
converting the acquired value a into b through analog-to-digital conversion, and calculating a data display value M, wherein the calculation formula of the data display value M is as follows:
wherein c is the upper limit value of the measuring range set by the sensor, and d is the lower limit value of the measuring range set by the sensor.
7. The method for calculating the wall thickness of the insulating pipe winding production line according to claim 3, wherein the method for calculating the winding position comprises the following steps:
L1＝L2-(S-L)
wherein, L1 is the winding position, L2 is the moving distance value of the heat preservation pipe, S is the set laser position, and L is the set pipe length value.
8. The method for calculating the wall thickness of the winding production line of the thermal insulation pipe according to claim 3, wherein the method for obtaining the materials of the single pipe comprises the following steps:
obtaining the material initialization value K 0 ；
Judging whether the hopper stops feeding, if so, recording a first weight value M1 of the hopper at the moment and starting an extrusion timer;
judging whether the hopper starts to feed, if so, recording a second weight value M2 of the hopper at the moment, and reading the time of an extrusion timer, namely a time interval delta t;
calculating the polyethylene material delta M and the discharging speed V, and starting a feeding timer;
judging whether the hopper stops feeding, if so, reading the time of a feeding timer at the moment to be delta t ', and calculating the single-tube material K, wherein K is delta M + V delta t' + K 0 。
9. The programmed control system for the insulated pipe winding production line according to claim 5, wherein the lower alarm threshold is smaller than the set value for closing the valve.
10. A program control system for a winding production line of a heat preservation pipe is characterized by comprising
The equipment layer at least comprises a laser range finder, a weighing sensor, an electromagnetic valve and production equipment, wherein the laser range finder is used for measuring the moving distance of the heat preservation pipe, and the weighing sensor is used for measuring the weight of the hopper;
the control layer comprises a PLC, the PLC adopts the wall thickness calculation method of the insulating tube winding production line according to any one of claims 1 to 9, the wall thickness calculation method is used for calculating the management data, the collected data and the management data are displayed on a remote operation screen in an optical fiber Ethernet communication mode, and an operator monitors the production condition of the insulating tube through the operation screen and remotely controls production equipment.
The management layer, the management layer includes thing networking cloud platform and mobile terminal, PLC pass through wireless transmission module with the thing networking cloud platform carries out data transmission, and authorized user passes through the mobile terminal and monitors, browses, downloads historical data to the whole of insulating tube production technology.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117775836A (en) * | 2024-02-28 | 2024-03-29 | 杉金光电(广州)有限公司 | Fracture prevention control method and system for TAC film production line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100052199A1 (en) * | 2006-12-04 | 2010-03-04 | Sikora Ag | Method for the operation of a production plant to produce an extrudate |
| US20140183365A1 (en) * | 2013-01-02 | 2014-07-03 | Proton Products International Limited | Measurement of industrial products manufactured by extrusion techniques |
| CN204019963U (en) * | 2014-07-03 | 2014-12-17 | 新疆华爱康塑业科技发展有限公司 | For the process control equipment of PE tube extrusion wall thickness |
| CN111844689A (en) * | 2020-06-15 | 2020-10-30 | 江苏通光信息有限公司 | Production line intelligent linkage control mode of extrusion molding equipment |
| CN112747177A (en) * | 2021-01-08 | 2021-05-04 | 康泰塑胶科技集团有限公司 | Pressure-bearing prefabricated sealing ring double-wall corrugated pipe, forming system and forming method |
| CN113096368A (en) * | 2021-04-16 | 2021-07-09 | 天津太合节能科技有限公司 | Monitoring method of hot melting monitoring system |
-
2022
- 2022-03-30 CN CN202210330833.9A patent/CN114939975A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100052199A1 (en) * | 2006-12-04 | 2010-03-04 | Sikora Ag | Method for the operation of a production plant to produce an extrudate |
| US20140183365A1 (en) * | 2013-01-02 | 2014-07-03 | Proton Products International Limited | Measurement of industrial products manufactured by extrusion techniques |
| CN204019963U (en) * | 2014-07-03 | 2014-12-17 | 新疆华爱康塑业科技发展有限公司 | For the process control equipment of PE tube extrusion wall thickness |
| CN111844689A (en) * | 2020-06-15 | 2020-10-30 | 江苏通光信息有限公司 | Production line intelligent linkage control mode of extrusion molding equipment |
| CN112747177A (en) * | 2021-01-08 | 2021-05-04 | 康泰塑胶科技集团有限公司 | Pressure-bearing prefabricated sealing ring double-wall corrugated pipe, forming system and forming method |
| CN113096368A (en) * | 2021-04-16 | 2021-07-09 | 天津太合节能科技有限公司 | Monitoring method of hot melting monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117775836A (en) * | 2024-02-28 | 2024-03-29 | 杉金光电(广州)有限公司 | Fracture prevention control method and system for TAC film production line |
| CN117775836B (en) * | 2024-02-28 | 2024-04-30 | 杉金光电(广州)有限公司 | Fracture prevention control method and system for TAC film production line |
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