An oil lubrication device

Abstract

This utility model relates to an oil lubrication device, including an oil tank, an upper liquid roller, a float, a vertical guide rod, a controller, an oil delivery unit, and an oil delivery pipe. The oil tank is used to contain liquid lubricant. The upper liquid roller is rotatably mounted above the oil tank to guide the fibers to be lubricated into the oil tank. The vertical guide rod is vertically fixed in the oil tank. The float has a hole in its middle and is fitted through the hole into the vertical guide rod. The float floats up and down with the liquid level due to the buoyancy of the lubricant. A photoelectric switch corresponding to the float is also provided on one side of the vertical guide rod. This system achieves precise control of the liquid level in the tank and realizes 24-hour intelligent continuous production through adaptive adjustment of the controller, significantly improving product quality and greatly reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of ultra-high molecular weight polyethylene fiber production equipment, and in particular to an oil lubrication device. Background Technology

[0002] In the production of UHMWPE fibers, the fiber bundles after hot-box drying are relatively dry, prone to static electricity, and have poor cohesion between filaments, resulting in loose filaments and a high coefficient of friction. Therefore, before entering the seven-roll drafting mill, they need to be lubricated in a white oil bath to reduce static electricity on the filament surface, which is beneficial for filament bundling and stabilizing subsequent spinning processes. The stability of the white oil bath's liquid level directly affects the uniformity of fiber lubrication, the stability of the drafting process, and the final product quality. Traditional manual control methods have many drawbacks: First, the accuracy of liquid level control is insufficient, and manual adjustment is difficult to maintain the ±2mm requirement, leading to frequent problems such as overflow (excessive oil level causing white oil to spill and contaminate the equipment) or insufficient oil (insufficient oil level causing insufficient fiber wetting); second, production efficiency is low, relying on frequent worker inspections and manual operation, which affects both production continuity and response speed; third, liquid level fluctuations directly cause uneven oiling of fibers, significantly increasing fuzz (insufficient lubrication leading to increased friction) and fiber breakage rate (abnormal tension), seriously affecting product quality stability; finally, manual operation is often accompanied by excessive addition of white oil and overflow accidents, which not only wastes resources but also increases cleaning costs.

[0003] CN222008188U proposes an ultra-high molecular weight polyethylene fiber oiling device based on the principle of communicating vessels. It automatically compensates for oil consumption in the immersion tank by lifting a buffer tank with a spring seat (liquid level change Δh = L / A), and achieves intermittent oil replenishment of the storage tank by combining a proximity switch and an electric valve. Its core innovation lies in its mechanical liquid level stabilization design, eliminating the need for frequent motor starts and stops, thus reducing energy consumption and maintenance requirements. However, it has inherent limitations: First, the liquid level adjustment based on the principle of communicating vessels and spring lifting has a lag, making it difficult to achieve high-precision liquid level control; second, the system is sensitive to changes in oil viscosity and temperature, and high-viscosity media may cause spring response delays, affecting stability; third, its intermittent oil replenishment control via proximity switches lacks dynamic adjustment capability, unable to adjust the replenishment rate in real time according to liquid level changes, easily leading to over- or under-replenishment; finally, its mechanical structure design has high requirements for the working environment, making it difficult to adapt to media of different viscosities or extreme conditions (such as high temperature and corrosive environments), significantly limiting the system's scalability and adaptability. Summary of the Invention

[0004] The purpose of this utility model is to provide an oil-lubricating device that solves the above-mentioned problems, specifically achieved by the following technical solution:

[0005] An oil lubrication device includes an oil tank, an upper liquid roller, a float, a vertical guide rod, a controller, an oil delivery unit, and an oil delivery pipe. The oil tank contains liquid lubricant. The upper liquid roller is rotatably positioned above the oil tank to guide fibers to be lubricated into the oil tank. The vertical guide rod is vertically fixed in the oil tank. The float has a hole in its center and is fitted through the hole into the vertical guide rod. The float floats up and down with the liquid level due to the buoyancy of the lubricant. A connecting element is also provided on one side of the vertical guide rod. A photoelectric switch corresponding to the float receives a light signal emitted by the float and reflected back by the float when the float is within its detection range. The photoelectric switch is signal-connected to the controller. One end of the oil delivery pipe is connected to an external lubricant container, and the other end is located on one side of the vertical guide rod. The oil delivery unit is connected to the oil delivery pipe and provides power to the lubricant, transporting the lubricant from the lubricant container to the oil tank via the oil delivery pipe. The controller is signal-connected to the oil delivery unit.

[0006] The oil lubrication device is further designed such that the oil delivery unit is an oil pump connected in series in the oil delivery pipe.

[0007] The oil lubrication device is further designed such that the oil delivery unit consists of an air blowing pipe located on one side of the oil outlet port of the oil delivery pipe and an air pump connected to the air blowing pipe. When the air blowing pipe blows air tangentially from the oil outlet port of the oil delivery pipe, a negative pressure is formed inside the oil delivery pipe, which introduces the lubricant in the lubricant container into the oil tank.

[0008] The oil lubrication device is further designed such that a solenoid valve is connected in series in the oil delivery pipe.

[0009] The oil lubrication device is further designed such that the surface of the vertical guide rod is coated with Teflon, resulting in a friction coefficient ≤0.05.

[0010] The beneficial effects of this utility model are as follows:

[0011] This system achieves precise control of the tank liquid level, enabling 24-hour intelligent continuous production through adaptive adjustment of the controller. This significantly improves product quality (fiber breakage rate reduced by over 60%, finished product fineness CV value <3%) and substantially reduces costs (white oil usage reduced by 30%). The system boasts excellent scalability and can be widely applied to oil tank level control in the chemical fiber industry. It is also suitable for various industrial scenarios, including gluing of non-woven fabrics, dye and auxiliary agent addition in textile printing and dyeing, paper coating liquid supply, chemical reactor feeding, food and beverage filling, semiconductor etching solution management, environmental water treatment agent dosing, and new energy battery electrolyte injection. By flexibly replacing high-temperature resistant, corrosion-resistant, or explosion-proof sensors (such as laser, infrared, or ultrasonic), it adapts to temperature ranges from -40℃ to 1000℃ and complex media environments such as strong acids, strong alkalis, and high viscosity, achieving high-precision, non-contact liquid level monitoring and automatic liquid supply control, significantly improving production automation and process stability. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] As shown in the figure, an oil lubrication device includes an oil tank 9, an upper liquid roller 10, a float 8, a vertical guide rod 7, a controller, an oil delivery unit, and an oil delivery pipe 11. The oil tank 9 is used to contain liquid lubricant. The upper liquid roller is rotatably positioned above the oil tank to guide the fibers to be lubricated into the oil tank. The vertical guide rod is vertically fixed in the oil tank. The float has a hole in its middle and is fitted through the hole into the vertical guide rod. The float floats up and down with the liquid level due to the buoyancy of the lubricant. A side of the vertical guide rod is also provided with... A photoelectric switch 6 corresponding to the float is provided. When the float is within the detection range of the photoelectric switch, the photoelectric switch can receive the light signal emitted by itself and reflected back by the float. The photoelectric switch is signal-connected to the controller. One end of the oil delivery pipe is connected to an external lubricant container storing lubricant, and the other end is located on one side of the vertical guide rod. The oil delivery unit is connected to the oil delivery pipe and provides power to the lubricant, delivering the lubricant in the lubricant container to the oil tank through the oil delivery pipe 11. The controller is signal-connected to the oil delivery unit.

[0015] Photoelectric switch 6 is fixedly installed on the side wall of the tank at the set liquid level. When the liquid level rises to the set position, float 8 enters the detection area of ​​the photoelectric switch, triggering a detection signal. When the liquid level drops, the float leaves the detection area, and the signal disappears. Low liquid level control: When the liquid level drops and causes the float to leave the detection range of the photoelectric switch, the controller controls the oil delivery unit to start replenishing liquid; High liquid level control: When the liquid level rises and causes the float to enter the detection range of the photoelectric switch, the oil delivery unit shuts off. During normal operation, the fiber bundle exits from the hot box, passes through the white oil tank for wetting, and then enters the seven-roller stretching process. During production, the liquid level in the oil tank gradually decreases, until it drops to a certain level where the fiber bundle cannot be wetted.

[0016] Specifically, the oil delivery unit consists of an air blowing pipe 12 located on one side of the oil outlet port of the oil delivery pipe and an air pump (connected to a controller, not shown in the figure) connected to the air blowing pipe. When the air blowing pipe blows air tangentially from the oil outlet port of the oil delivery pipe, a negative pressure is formed inside the oil delivery pipe based on Bernoulli's principle, introducing the lubricant from the lubricant container into the oil tank. The float is obviously made of lightweight material. Since the air blowing pipe is located on one side of the float 8, the blown airflow creates disturbance, preventing the lightweight float from sticking to the vertical guide rod due to the high viscosity of the lubricant.

[0017] A solenoid valve 3 is connected in series in the oil pipeline. The solenoid valve is also connected to the controller. When the solenoid valve is closed, the controller controls the air pump to blow out air at regular intervals. If the float sticks to the vertical guide rod 7 and is separated from the lubricant surface, it will slide due to the airflow disturbance and return to the surface; ensuring that the liquid level control logic operates normally.

[0018] To reduce adhesion between the vertical guide rod and the float, the surface of the vertical guide rod is coated with Teflon, resulting in a friction coefficient ≤0.05.

[0019] The oil delivery unit can be an oil pump (not shown in the figure) connected in series in the oil delivery pipe. That is, the oil delivery unit formed by the air pump and the air blowing pipe is replaced with an oil pump. In this case, the anti-adhesion disturbance of the float is not as good as before the replacement.

[0020] A normally open manual valve 1 can also be installed in the oil pipeline for closing the pipeline during equipment maintenance. Specifically, this manual valve 1 can be directly connected to the solenoid valve 3 using the double-ended connector 2. The oil outlet end of the oil pipeline is connected to the port pipeline 5 via the connecting pipe 4. The port pipeline 5 with different opening orientations can be selected and replaced according to different oil delivery units in the aforementioned embodiments.

Claims

1. An oil-lubricating device, characterized in that... The system includes an oil tank, a liquid roller, a float, a vertical guide rod, a controller, an oil delivery unit, and an oil delivery pipe. The oil tank contains liquid lubricant. The liquid roller is rotatably positioned above the oil tank to guide the fibers to be lubricated into it. The vertical guide rod is fixedly installed vertically in the oil tank. The float has a hole in its center and passes through the hole into the vertical guide rod. The float floats up and down with the liquid level due to the buoyancy of the lubricant. A photoelectric switch corresponding to the float is also provided on one side of the vertical guide rod. When the float is within the detection range of the photoelectric switch, the switch can receive the light signal emitted by the float and reflected back by it. The photoelectric switch is signal-connected to the controller. One end of the oil delivery pipe is connected to an external lubricant container, and the other end is located on one side of the vertical guide rod. The oil delivery unit is connected to the oil delivery pipe and provides power to the lubricant, transporting the lubricant from the container to the oil tank via the oil delivery pipe. The controller is signal-connected to the oil delivery unit.

2. The oil lubrication device according to claim 1, characterized in that, The oil delivery unit is an oil pump connected in series in the oil delivery pipeline.

3. The oil lubrication device according to claim 1, characterized in that, The oil delivery unit consists of an air blowing pipe located on one side of the oil outlet port of the oil delivery pipe and an air pump connected to the air blowing pipe. When the air blowing pipe blows air tangentially from the oil outlet port of the oil delivery pipe, a negative pressure is formed inside the oil delivery pipe, which introduces the lubricant in the lubricant container into the oil tank.

4. The oil lubrication device according to any one of claims 1-3, characterized in that, A solenoid valve is connected in series in the oil pipeline.

5. The oil lubrication device according to any one of claims 1-3, characterized in that, The surface of the vertical guide rod is treated with a Teflon coating, and the coefficient of friction is ≤0.05.

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