A lubricating oil accurate quantitative control system
By using a PLC controller and a timing control system for solenoid valves, the problem of unstable lubricant control in paper-based aluminum-plastic roll-top container molding equipment was solved, achieving precise quantitative supply of lubricant, improving product quality and production efficiency, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN HONGCHUANG PACKAGING CO LTD
- Filing Date
- 2025-12-10
- Publication Date
- 2026-07-21
AI Technical Summary
In the existing technology, the paper-based aluminum-plastic roll-top container molding equipment has problems with unstable oil volume and residue in the control of lubricating oil, resulting in poor consumer experience and high production efficiency and cost.
A timing control system using a PLC controller combined with solenoid valves and electric clamp valves controls the start and stop of the oil pump and the opening and closing of the valves through a timing module, achieving precise quantitative supply of lubricating oil. Combined with a visual dripper to observe the lubricating oil status, it ensures accurate control of oil quantity.
It achieves precise quantitative supply of lubricating oil, avoids lubricating oil residue, improves product quality and user satisfaction, reduces production costs, and increases production efficiency.
Smart Images
Figure CN224534019U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of paper roll machine technology, and in particular to a precise control system for lubricating oil metering. Background Technology
[0002] Currently, the main market for paper-based aluminum-plastic rolled-top containers is concentrated in the liquid beverage market, including liquid food industries such as milk tea, juice, tea drinks, and alcoholic beverages, primarily in the form of disposable cups, bowls, and buckets. During the container molding process, to prevent the PLA or PE film layer from generating debris due to severe hard friction with the rolling and bottom components of the equipment, lubricating oil is required for protection during the rolling and bottoming processes to reduce friction and the risk of debris generation.
[0003] Although food-grade lubricants are used in the manufacturing process, most consumers subconsciously feel a negative experience if their cup has oil stains or obvious lubricant residue. Ensuring that paper-based aluminum-plastic roll-top containers arrive at consumers' hands without noticeable lubricant marks or residue is a key issue that needs to be addressed and resolved.
[0004] Currently, the oil volume control in paper-based aluminum-plastic roll-top container forming equipment (paper cup, paper bowl, paper drum forming machine, etc.) in the industry is mainly achieved through mechanical intermittent oil control and pneumatic continuous oil supply. Both have their own advantages and disadvantages, but both are insufficient in terms of continuous and stable oil supply. The main problem is that when the machine is started or stopped, the remaining oil in the oil pipe will continue to be transported to the oil dipping tray, resulting in a large amount of oil in the paper cups during the restart period. Manual adjustment is difficult, and the stability of the oil volume is also insufficient. Utility Model Content
[0005] To solve or partially solve the problems existing in related technologies, this application provides a precise control system for lubricating oil metering. The system uses a timer module of a PLC controller to set the cycle period and a relay module to control the start and stop of the oil pump and the opening and closing of the valves, so as to achieve precise metering of oil supply.
[0006] The first aspect of this application provides a precise control system for dispensing lubricating oil, comprising: The oil tank contains an oil pump. A pressure sensor is installed at the output end of the oil pump and connected to two oil delivery pipes installed at the bottom of the oil tank via a branching device. Solenoid valves are installed on the oil delivery pipes respectively. The hose has an inlet end connected to the oil delivery pipe and an outlet end connected to the oil section for the coiled end and the oil section for the bottom of the trough, respectively. An electric clamp valve and a dripper are installed sequentially on the hose. The PLC controller is connected to the oil pump, solenoid valve, electric clamp valve, and pressure sensor.
[0007] The oil pump output end is connected to the oil pipeline via an equal-diameter tee connector.
[0008] The oil pipeline is equipped with a check valve and a turbine flow meter, and the turbine flow meter is electrically connected to the PLC controller.
[0009] Among them, a solenoid valve is installed on the oil pipeline, and the oil section of the coiled end is connected to the hose. An electric clamp valve and a drip pot are installed on the hose in sequence.
[0010] Among them, the oil pipeline is equipped with a No. 2 solenoid valve, and the No. 2 hose is connected to the bottom oil supply unit. The No. 2 electric clamp valve and drip pot are installed in sequence on the No. 2 hose.
[0011] The technical solution provided in this application may include the following beneficial effects: This application provides a precise control system for lubricating oil metering, employing a solenoid valve for drip-feed control, effectively improving the metering accuracy of lubricating oil. The visualized oil volume control pipeline allows operators to observe the lubricating oil delivery status in real time, facilitating timely adjustments. The system achieves precise lubricating oil metering control, effectively preventing excessive oil delivery caused by residual oil in the pipeline after start-stop operation. This ensures that the product delivered to consumers will not result in a poor user experience due to lubricating oil residue, improving overall product quality and user satisfaction. Simultaneously, it increases production efficiency and reduces production costs, demonstrating significant economic and social benefits.
[0012] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0013] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.
[0014] Figure 1 This is a schematic diagram of the structure of the lubricating oil metering precision control system shown in the embodiments of this application; Figure label: In the diagram, 1—oil tank, 101—oil pump, 102—oil delivery pipe, 2—PLC controller, 3—No. 1 solenoid valve, 4—No. 1 electric clamp valve, 5—drip dispenser, 6—No. 1 hose, 7—oil section for coiled ends, 8—oil section for bottom of the container, 9—No. 2 hose, 10—No. 2 electric clamp valve, 11—No. 2 solenoid valve. Detailed Implementation
[0015] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.
[0016] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0017] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0018] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0019] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.
[0020] like Figure 1 The lubricating oil metering precision control system shown includes: an oil tank 1, a first hose 6, a second hose 9, a PLC controller 2, and multiple electric valves. An oil pump 101 is installed inside the oil tank 1, and a pressure sensor is installed on the output pipeline of the oil pump 101. The output end is connected to two oil delivery pipes 102 installed at the bottom of the oil tank 1 through an equal diameter tee connector.
[0021] A solenoid valve 3 is installed on one oil delivery pipe 102, connecting it to the oil supply section 7 via a hose 6. An electric clamp valve 4 and a drip pot 5 are sequentially installed on the hose 6. A solenoid valve 11 is installed on another oil delivery pipe 102, connecting it to the oil supply section 8 via a hose 9. An electric clamp valve 10 and a drip pot 5 are sequentially installed on the hose 9. A check valve and a turbine flow meter are installed on the oil delivery pipes 102. The check valve prevents oil backflow during shutdown, avoiding leakage from the drip pot 5 or the oil supply section. The turbine flow meter is electrically connected to the PLC controller 2 to detect the oil output.
[0022] The dripper 5 is a transparent container. During normal system oil supply, lubricating oil continuously flows into dripper 5, dripping in droplets, allowing operators to visually observe the oil flow. When an oil cut-off operation is performed, the oil in dripper 5 stops dripping. By observing whether oil is dripping from dripper 5, operators can quickly and accurately determine whether the electric clamp valve is effectively closed and whether the entire oil circuit has been successfully blocked. If oil continues to drip from dripper 5 after the oil cut-off operation, there may be two possibilities: first, the electric clamp valve failed to fully clamp the hose, resulting in incomplete oil circuit blockage; second, the solenoid valve failed to close successfully, and oil pump 101 is still supplying lubricating oil to the pipeline. In this case, operators can further investigate the fault point based on the abnormal state of dripper 5, combined with system pressure sensor data and control signals, and promptly perform repairs and adjustments to ensure normal system operation.
[0023] Since the signal power output by the controller is relatively small, the PLC controller 2 is connected to the oil pump 101, solenoid valve, and electric clamp valve based on the relay module. The current is amplified through the relay module to drive the oil pump 101 motor, solenoid valve, and electric clamp valve.
[0024] After power is supplied, the system automatically starts oil pump 101, solenoid valve, and electric clamp valve pipe, following the main system. At this time, hose 6 (number one) and hose 9 (number two) supply oil to the oil section 7 (for the coiled end) and oil section 8 (for the bottom of the coil), respectively. After a period of time, the oil absorption capacity of the sponges in oil section 7 (for the coiled end) and oil section 8 (for the bottom of the coil) approaches saturation. At this point, oil supply needs to be stopped to prevent excessive oil volume and oil stains. At this time, the corresponding solenoid valve closes and stops supplying oil, and the electric clamp valve pipe closes and stops discharging oil from the hoses.
[0025] An electric clamp valve is installed on the upper part of the dripper 5. It mechanically squeezes the hose, causing the inner wall of the hose to fit tightly, or even completely close, directly blocking the flow of lubricating oil. The clamping force of the clamp valve is precisely calculated and selected to overcome the oil pressure in the pipeline, ensuring complete oil circuit blockage. Before the electric clamp valve actuates, the PLC controller 2 sends a closing command to the solenoid valve, cutting off the oil circuit between the oil pump 101 and the hose, causing the lubricating oil pressure upstream of the dripper 5 to drop rapidly to zero. At this point, the lubricating oil in the hose loses the driving pressure from the oil pump 101, and the flow state originally maintained by gravity and the pressure of the oil tank 1 can no longer continue. Furthermore, the residual lubricating oil in the hose, under the combined effects of its own viscosity, surface tension, and air resistance, is also unable to overcome the obstruction at the blockage point to continue flowing. Even if the hose is not completely closed, the lubricating oil cannot continue to flow due to the lack of a power source. Through the sequential coordination of pressure cutoff and physical blockage, a double guarantee is formed to ensure complete oil circuit blockage and achieve leak-free oil shut-off.
[0026] Since the system uses oil intermittently, it adopts an "intermittent operation" mode. The oil pump 101 is set to start and stop periodically (e.g., run for 5 minutes and stop for 10 minutes) through the PLC controller 2. In conjunction with the time-sharing control branch of the solenoid valve, the idling time of the oil pump 101 is reduced.
[0027] After the system is powered on, the PLC controller 2 detects the pressure sensor signal. If the pressure is within the normal range, it sends an opening signal to the oil pump 101, solenoid valve 3, solenoid valve 11, electric clamp valve 4, and electric clamp valve 10. At this time, the oil pump 101 operates, and the lubricating oil is delivered through the oil supply pipe 102 and the hose to the normally open electric clamp valve to the oil section 7 for the coiling end and the oil section 8 for the bottom of the coil. Independent timers are assigned to hose 6 (number 1) and hose 9 (number 2) via PLC controller 2: After oil supply begins in hose 6, timer 1 starts timing. When the timer reaches the set oil supply time for the coil oil section 7, the PLC controls solenoid valve 3 to close, stopping oil supply to hose 6. After a short delay (e.g., 1-2 seconds to prevent residual oil pressure from impacting the hose), the PLC controls electric clamp valve 4 to close, preventing further lubricant output. Timer 2 starts timing for the set stop oil supply time. After timing ends, the PLC reopens solenoid valve 3 and electric clamp valve 4, resuming oil supply to the coil oil section 7, and simultaneously resets timer 1, entering the next oil supply cycle.
[0028] After oil supply begins through hose 9 (number 2), timer 3 starts timing. When the timer reaches the set oil supply time for the bottom oil section 8, the PLC controls solenoid valve 11 (number 2) to close, stopping oil supply to hose 9. After a short delay, the PLC controls electric clamp valve 10 (number 2) to close, cutting off the oil supply to hose 9. Timer 4 starts timing for the set oil supply stop time. After the timer ends, the PLC reopens solenoid valve 11 and electric clamp valve 2, resuming oil supply to the bottom oil section 8, and simultaneously resets timer 3 to begin the next oil supply cycle.
[0029] The oil pump 101 is controlled by the PLC controller 2. When either the first solenoid valve 3 or the second solenoid valve 11 is open, the oil pump 101 runs continuously. When both the first solenoid valve 3 and the second solenoid valve 11 are closed, the PLC controls the oil pump 101 to stop running in order to reduce energy consumption and equipment wear.
[0030] During system operation, if the pressure sensor detects that the pressure exceeds the alarm threshold, the PLC immediately sends a shut-off signal to oil pump 101, solenoid valve 3, solenoid valve 11, electric clamp valve 4, and electric clamp valve 10 to stop the entire system operation and trigger the alarm device to prompt the operator to troubleshoot the fault.
[0031] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0032] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0033] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A lubricating oil rationing precision control system, characterized by, include: The oil tank contains an oil pump. A pressure sensor is installed at the output end of the oil pump and connected to two oil delivery pipes installed at the bottom of the oil tank via a branching device. Solenoid valves are installed on the oil delivery pipes respectively. The hose has an inlet end connected to the oil delivery pipe and an outlet end connected to the oil section for the coiled end and the oil section for the bottom of the container, respectively. An electric clamp valve and a drip pot are installed sequentially on the hose. The PLC controller is connected to the oil pump, the solenoid valve, the electric clamp valve, and the pressure sensor.
2. The lubricating oil dosing system of claim 1, wherein, The output end of the oil pump is connected to the oil pipeline via an equal diameter tee connector.
3. The lubricating oil dosing system of claim 1, wherein, The oil pipeline is equipped with a check valve and a turbine flow meter, and the turbine flow meter is electrically connected to the PLC controller.
4. The lubricating oil dosing system of claim 1, wherein, A solenoid valve is installed on the oil pipeline. Based on the connection between the first hose and the oil section of the coil, an electric clamp valve and a drip pot are installed sequentially on the first hose.
5. The lubricating oil dosing system of claim 1, wherein, A No. 2 solenoid valve is installed on the oil pipeline. Based on the connection between the No. 2 hose and the bottom oil supply section, a No. 2 electric clamp valve and a drip pot are installed sequentially on the No. 2 hose.