Return oil flow monitoring system

Abstract

The utility model discloses a return oil flow monitoring system, which comprises an oil return pipeline on a cone crusher and an oil tank connected with the oil return pipeline, and is characterized by further comprising a flow sensor arranged on the oil return pipeline and a PLC (programmable logic controller), an oil quantity stabilizing device is connected and mounted on the oil return pipeline between the flow sensor and the oil tank, and the PLC is connected with the oil quantity stabilizing device. The oil quantity stabilizing device is provided with a liquid level sensor, and the signal output end of the flow sensor and the signal output end of the liquid level sensor are connected with the signal input end of the PLC. The device has the advantages that two sensing signals of the flow sensor and the liquid level sensor are combined, the signals are transmitted to the PLC, oil shortage of the oil return pipeline is indicated if the signals are clearly lower than a flow preset value and an oil level preset value, and when the lubricating oil level of the oil tank drops to an alarm position, alarm processing is performed in advance. And the oil leakage fault which is not found in advance due to untimely finding is avoided.

Description

Technical fields:

[0001] This utility model relates to the field of lubricating oil monitoring, specifically to a return oil flow monitoring system. Background technology:

[0002] The cone crusher has built-in copper bearings and relies on lubricating oil for cooling and lubrication during operation. Insufficient oil will cause serious damage to the equipment. Generally, oil circuit monitoring is done by installing flow meters or pressure gauges at the equipment's oil inlet pipe to monitor the lubrication status of the cone crusher from the thin oil station. Oil return monitoring is typically done by monitoring the oil level in the hydraulic thin oil station.

[0003] However, this type of monitoring method still shows normal lubricating oil pressure and flow when equipment malfunctions, such as when there is an internal oil leak in a cone crusher. It only triggers an alarm or trips the equipment when the leak becomes significant and the lubricating oil level in the tank drops to the alarm level. In other words, existing oil flow protection devices suffer from monitoring lag, failing to detect oil leaks in a timely manner. Ultimately, this process leads to substantial lubricating oil loss, environmental pollution, and economic losses. Utility Model Content:

[0004] The purpose of this invention is to provide a return oil flow monitoring system.

[0005] This utility model is implemented by the following technical solution:

[0006] A return oil flow monitoring system includes a return oil pipe on a cone crusher and an oil tank connected to the return oil pipe. It also includes a flow sensor installed on the return oil pipe and a PLC controller. An oil quantity stabilizing device is connected and installed on the return oil pipe between the flow sensor and the oil tank. The oil quantity stabilizing device is equipped with a liquid level sensor. The signal output terminals of the flow sensor and the liquid level sensor are respectively connected to the signal input terminal of the PLC controller.

[0007] The oil volume stabilizing device includes a cylindrical shell, an inner cylinder inside the cylindrical shell, the top of the inner cylinder being fixed to the top of the cylindrical shell, an oil inlet pipe communicating with the inner cylinder on one side of the cylindrical shell, an oil overflow port lower than the oil inlet pipe on the side of the inner cylinder, and an oil outlet lower than the oil overflow port on the other side of the cylindrical shell.

[0008] The sensing end of the liquid level sensor is located inside the inner cylinder, below the overflow port, from the top of the inner cylinder.

[0009] Preferably, the PLC controller is electrically connected to the audible and visual alarm.

[0010] Preferably, a plug is screwed to the bottom of the cylindrical shell, and a rubber plug that passes through the bottom of the inner cylinder is fixed to the end of the plug.

[0011] The advantages of this invention are as follows: Under normal circumstances, lubricating oil flows back to the oil tank from the return oil pipe. When there is a shortage of oil in the return oil pipe, the flow sensor first monitors the amount of lubricating oil in the return oil pipe. If it is lower than the preset value, to avoid false alarms or other interference that may cause intermittent oil delivery before returning to normal, an oil volume stabilization device ensures the accuracy of the level sensor's sensing. The level sensor's sensing further confirms the reduction or even interruption of oil flow. Combining the signals from the flow sensor and the level sensor, the signal is transmitted to the PLC controller. It is confirmed that the oil level is below the preset flow and oil level values, indicating a shortage of oil in the return oil pipe. When the lubricating oil level in the oil tank drops to the alarm position, an alarm is triggered in advance. This avoids the situation where oil leakage is not detected in time. Attached image description:

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is an enlarged schematic diagram of the structure of the oil quantity stabilization device of this utility model.

[0015] In the diagram: 1. Oil return pipe; 2. Oil tank; 3. Flow sensor; 4. PLC controller; 5. Oil quantity stabilizing device; 5.1. Cylindrical shell; 5.2. Inner cylinder; 5.3. Oil inlet pipe; 5.4. Oil outlet; 5.5. Liquid level sensor; 6. Audible and visual alarm; 7. Plug; 8. Rubber plug; 9. Detailed implementation method:

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 , Figure 2As shown, a return oil flow monitoring system includes a return oil pipe 1 on a cone crusher, an oil tank 2 connected to the return oil pipe 1, a flow sensor 3 installed on the return oil pipe 1, and a PLC controller 4. An oil quantity stabilizing device 5 is connected and installed on the return oil pipe 1 between the flow sensor 3 and the oil tank 2. The oil quantity stabilizing device 5 is equipped with a liquid level sensor 6. The signal output terminals of the flow sensor 3 and the liquid level sensor 6 are respectively connected to the signal input terminal of the PLC controller 4.

[0018] Under normal circumstances, lubricating oil flows back from return oil pipe 1 to oil tank 2. When there is a shortage of oil in return oil pipe 1, flow sensor 3 first monitors the amount of lubricating oil in return oil pipe 1 and transmits the signal to PLC controller 4 in real time. When the amount of lubricating oil in return oil pipe 1 decreases and reaches the preset value, PLC controller 4 can connect to the display terminal to display it. In order to avoid false alarms or other interference that cause the oil volume to return to normal after intermittent delivery, the oil volume stabilization device 5 ensures the accuracy of the sensing of liquid level sensor 6. The sensing of liquid level sensor 6 further clarifies that the oil volume has decreased or even stopped. Combining the two sensing signals from flow sensor 3 and liquid level sensor 6, the signal is transmitted to PLC controller 4 to clarify that if the flow rate is lower than the preset value and the oil level is lower than the preset value, it indicates that there is a shortage of oil in return oil pipe 1.

[0019] The oil quantity stabilizing device 5 includes a cylindrical shell 5.1, an inner cylinder 5.2 inside the cylindrical shell 5.1, the top of the inner cylinder 5.2 being fixed to the top of the cylindrical shell 5.1, an oil inlet pipe 5.3 communicating with the inner cylinder 5.2 on one side of the cylindrical shell 5.1, an oil overflow port 5.4 lower than the oil inlet pipe 5.3 on the side of the inner cylinder 5.2, and an oil outlet 5.5 lower than the oil overflow port 5.4 on the other side of the cylindrical shell 5.1.

[0020] The sensing end of the liquid level sensor 6 is located inside the inner cylinder 5.2, which is below the overflow port 5.4, from the top of the inner cylinder 5.2.

[0021] When lubricating oil enters the oil level stabilizing device 5, it enters the inner cylinder 5.2 through the oil inlet pipe 5.3, and after accumulating, it flows out from the overflow port 5.4 (multiple ports can be set) to the cylindrical shell 5.1, and finally enters the oil tank 2 from the oil outlet 5.5. The level sensor 6 senses the oil level in the inner cylinder 5.2. When the lubricating oil always flows through the oil level stabilizing device 5, a certain amount of oil will always exist in the inner cylinder 5.2. The level sensor 6 will always sense it and will not be affected by fluctuations. When the oil stops flowing for a long time, there will be no oil overflow in the inner cylinder 5.2, the top of the sensing end of the level sensor 6 will be exposed, the oil level will drop, and the PLC controller 4 will monitor the abnormal signal.

[0022] The PLC controller 4 is electrically connected to the audible and visual alarm 7. When the oil return pipeline 1 is low on oil, the audible and visual alarm 7 can directly alert the user.

[0023] A plug 8 is screwed to the bottom of the cylindrical shell 5.1. A rubber plug 9 is fixed to the end of the plug 8 and inserted into the bottom of the inner cylinder 5.2. The plug 8 seals the bottom of the cylindrical shell 5.1 through a sealing ring, while the rubber plug 9 seals the bottom of the inner cylinder 5.2. The oil inside the cylindrical shell 5.1 and the inner cylinder 5.2 can be cleaned by removing the plug 8 and the rubber plug 9.

[0024] Working Principle: Under normal circumstances, lubricating oil flows back from the return oil pipe 1 to the oil tank 2. When there is a shortage of oil in the return oil pipe 1, the flow sensor 3 first monitors the amount of lubricating oil in the return oil pipe 1 and transmits the signal to the PLC controller 4 in real time. When the amount of lubricating oil in the return oil pipe 1 decreases and reaches the preset value, the oil level stabilization device 5 ensures the accurate sensing of the liquid level sensor 6. When the lubricating oil enters the oil level stabilization device 5, it enters the inner cylinder 5.2 through the oil inlet pipe 5.3, and after storage, it flows out from the overflow port 5.4 (multiple ports can be set) to the cylindrical shell 5.1. Then, the oil enters the oil tank 2 from the outlet 5.5. The level sensor 6 senses the oil level in the inner cylinder 5.2. When the oil flow stops for a long time, there is no oil overflow in the inner cylinder 5.2. The top of the sensing end of the level sensor 6 is exposed, and the oil level drops. The PLC controller 4 monitors the abnormal signal. Through the sensing of the level sensor 6, it is further confirmed that the oil volume has decreased or even stopped. Combining the sensing signals of the flow sensor 3 and the level sensor 6, the signal is transmitted to the PLC controller 4. It is confirmed that the flow rate is lower than the preset value and the oil level is lower than the preset value, indicating that the return oil pipeline 1 is short of oil. The audible and visual alarm 7 can directly alarm and remind.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A return oil flow monitoring system, comprising a return oil pipe on a cone crusher and an oil tank connected to the return oil pipe, characterized in that, It also includes a flow sensor installed on the return oil pipeline and a PLC controller. An oil quantity stabilizing device is connected and installed on the return oil pipeline between the flow sensor and the oil tank. The oil quantity stabilizing device is equipped with a liquid level sensor. The signal output terminals of the flow sensor and the liquid level sensor are respectively connected to the signal input terminal of the PLC controller. The oil volume stabilizing device includes a cylindrical shell, an inner cylinder inside the cylindrical shell, the top of the inner cylinder being fixed to the top of the cylindrical shell, an oil inlet pipe communicating with the inner cylinder on one side of the cylindrical shell, an oil overflow port lower than the oil inlet pipe on the side of the inner cylinder, and an oil outlet lower than the oil overflow port on the other side of the cylindrical shell. The sensing end of the liquid level sensor is located inside the inner cylinder, below the overflow port, from the top of the inner cylinder.

2. The oil return flow monitoring system according to claim 1, characterized in that: The PLC controller is electrically connected to the audible and visual alarm.

3. The oil return flow monitoring system according to claim 1, characterized in that: The bottom of the cylindrical shell is sealed with a plug, and the end of the plug is fixed with a rubber plug that passes through the bottom of the inner cylinder.

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