Air spring pipeline system of marine low-speed diesel engine

Abstract

An air spring pipeline system of a marine low-speed diesel engine comprises a discharge tank, a pressure relief valve, a liquid level switch, a throttle valve, a liquid level alarm and a three-way valve. The discharge tank receives and stores oil-containing air, and the pressure relief valve releases the air to the rack. The liquid level switch detects the liquid level change in the discharge tank, and the throttling valve adjusts the liquid flow when the liquid level is abnormal. And the liquid level alarm is triggered to give an alarm when the liquid level reaches a threshold value. The three-way valve provides a sampling path and is used for detecting the leakage condition in the discharge tank and judging the oil storage state and the exhaust valve sealing ring condition. If the hydraulic oil is detected to overflow, the sealing ring is damaged; if only air overflows, the liquid level switch may be damaged. According to the utility model, the fault pre-judgment accuracy is improved, and the downtime and the maintenance cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of marine low-speed diesel engines, in particular to an air spring pipeline system of a marine low-speed diesel engine. Background Art

[0002] The air spring piping system of a low-speed marine diesel engine is equipped with a leakage monitoring device. Its core function is to use hydraulic oil to push open the valve stem during the exhaust valve's operating cycle to effectively discharge gas, while ensuring smooth air flow into the exhaust valve's air cylinder, providing the necessary pressure support for accurate valve stem closure. However, if hydraulic oil leaks into the air cylinder, this air, containing hydraulic oil, is transported through the air spring piping to the bleed tank. This indicates that the exhaust valve's internal sealing ring may have failed. If this issue is neglected for a long time, the exhaust valve's sealing performance will deteriorate, leading to air and oil leakage, seriously affecting the diesel engine's emission efficiency and overall performance.

[0003] The operating mechanism of the traditional air spring piping system is summarized as follows:

[0004] After precisely regulated air flow through the main engine's pressure reducing station, it enters each air cylinder. Its key function is to help the exhaust valve stem achieve stable return during main engine operation. Under standard operating conditions, only pure air flows through the air spring line, and is released into the atmosphere through the coordinated action of the bleed tank and pressure relief valve.

[0005] However, when the exhaust valve seal fails due to wear or other reasons, hydraulic fluid inevitably leaks into the air cylinder and, along with the air, into the air spring line. During this process, the oil-laden air is captured in the bleeder tank during the release process. As the oil accumulates in the bleeder tank, when the oil level reaches the preset level switch position, the switch automatically activates, triggering a series of release actions. This involves directing the oil-laden air through components such as the pressure relief valve, throttle valve, and funnel to the main pipe and ultimately to the atmosphere. If the amount of oil released increases abnormally, reaching the level alarm threshold, the system will sound an alarm, prompting the operator to replace the exhaust valve seal.

[0006] While traditional air spring piping systems effectively monitor hydraulic oil leaks to a certain extent, their reliance on level alarms and funnel discharge volume for fault diagnosis has limitations. In particular, when the level alarm malfunctions or false alarms occur, the system often needs to be shut down for a comprehensive inspection, which not only increases maintenance costs but also seriously affects system operating efficiency and the accuracy of fault prediction. Utility Model Content

[0007] In order to solve the above problems, the utility model proposes an air spring piping system for a marine low-speed diesel engine. The system realizes real-time monitoring of the system status and fault prediction by introducing a three-way valve structure, an intelligent sensor and a remote monitoring platform.

[0008] The technical solutions of this utility model are as follows:

[0009] An air spring piping system for a low-speed marine diesel engine is characterized by comprising:

[0010] a discharge tank, connected upstream to the exhaust valve of the air cylinder, for receiving and storing oil-laden air discharged from the exhaust valve;

[0011] a pressure relief valve, disposed downstream of the relief tank, for releasing air into the rack;

[0012] a liquid level switch, disposed in the inner cavity of the discharge tank, for detecting changes in the liquid level in the discharge tank;

[0013] a throttle valve, interconnected with the liquid level switch, for regulating the flow of liquid in the discharge tank when the liquid level switch is triggered;

[0014] A liquid level alarm is installed on the top of the discharge tank, and triggers an alarm signal when the liquid level in the discharge tank reaches a preset threshold;

[0015] A three-way valve is connected between the discharge tank and the frame, and provides a sampling path for detecting leakage in the discharge tank through a sampling tube when the liquid level alarm triggers an alarm, so as to judge the oil content in the discharge tank (1) and the state of the exhaust valve sealing ring;

[0016] Among them, when the liquid level in the discharge tank reaches the preset threshold, the liquid level alarm triggers the alarm. The operator can detect the leakage in the discharge tank by detecting the sampling path of the three-way valve. If hydraulic oil overflow is detected, it indicates that the sealing ring of the exhaust valve is damaged; if only air overflow is detected, it indicates that the liquid level switch is damaged.

[0017] Furthermore, the linkage setting of the liquid level switch and the throttle valve can automatically adjust the opening of the throttle valve when an abnormal liquid level is detected to control the liquid flow in the discharge tank and prevent malfunctions caused by excessively high liquid levels.

[0018] Furthermore, a sampling valve is provided on the sampling path of the detection three-way valve for starting the sampling operation when necessary, so as to facilitate fault prediction and maintenance and repair.

[0019] Furthermore, it also includes an intelligent sensor group, including at least one liquid level sensor and one pressure sensor, for real-time monitoring of liquid level and pressure parameters in the discharge tank.

[0020] Furthermore, it also includes a remote monitoring platform, which is connected to the intelligent sensor group, receives and processes sensor data, and provides fault warning and diagnosis services; among them, when the sealing ring of the exhaust valve is damaged, causing the hydraulic oil to mix with air and enter the discharge tank, the liquid level sensor detects the oil level rising and triggers an alarm signal. The operator can view real-time data through the remote monitoring platform and use the sampling path of the three-way valve to predict faults.

[0021] Furthermore, it also includes an adaptive control module, which adjusts the opening degree of the three-way valve and / or the flow rate of the throttle valve in real time according to the data provided by the intelligent sensor group to achieve more precise pressure control and fault prevention.

[0022] Furthermore, the remote monitoring platform has a data storage and analysis function module for storing historical data and predicting the possibility of faults based on intelligent algorithms; and a remote configuration, debugging and maintenance function module, which allows operators to remotely operate the system and reduce on-site maintenance costs.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1) By adding a detection three-way valve and a liquid level alarm, when the liquid level in the discharge tank is abnormal, an alarm can be quickly triggered, and a fault prediction can be performed by detecting the sampling path of the three-way valve. This greatly shortens the time to discover faults, allowing maintenance personnel to quickly locate the problem and take appropriate measures, thereby improving maintenance efficiency. Because faults can be discovered and handled in a timely manner, long shutdowns caused by worsening faults are avoided. For marine low-speed diesel engines, this means higher operational reliability and lower downtime losses. The utility model improves the fault prediction accuracy of the air spring piping system of marine low-speed diesel engines, reducing downtime and maintenance costs.

[0025] 2) Integrating with a remote monitoring platform enables real-time monitoring of the discharge tank liquid level and remote reception of alarm signals. This not only improves monitoring convenience but also enables maintenance personnel to obtain fault information immediately, providing strong support for rapid response. The introduction of adaptive control and multi-sensor fusion technologies enhances the system's intelligence and fault prevention capabilities.

[0026] 3) The linkage between the liquid level switch and the throttle valve enables automatic adjustment of the liquid level in the discharge tank. This automated control mechanism helps reduce human intervention and improves system stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a traditional air spring piping system.

[0028] Figure 2This is a structural diagram of the air spring piping system of the utility model embodiment

[0029] In the figure: 1-discharge tank, 2-pressure relief valve, 3-liquid level switch, 4-throttle valve, 5-funnel, 6-liquid level alarm, 7-three-way valve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] This embodiment is an air spring piping system for a low-speed marine diesel engine, which aims to improve the accuracy of fault prediction and the convenience of maintenance and repair. The system is connected to the main engine's pressure reducing station and includes key components such as a discharge tank, a three-way valve and other auxiliary equipment. Figure 2 Shown, including:

[0032] Drain tank 1: Its upstream is directly connected to the exhaust valve of the air cylinder and is used to receive and store the oil-containing air discharged from the exhaust valve to ensure that only air is released into the system under normal operation.

[0033] Pressure relief valve 2: Responsible for releasing pressure when the system pressure is too high to protect the system safety.

[0034] Liquid level switch 3 and throttle valve 4: They are arranged inside the discharge tank 1. When the oil level rises, the liquid level switch 3 is triggered, and the throttle valve 4 controls the outflow speed of the oil to avoid instantaneous pressure shock.

[0035] Liquid level alarm 6: installed on the upper part of the discharge tank 1. When the amount of discharged oil exceeds the preset threshold, an alarm signal is triggered to remind the operator that the sealing ring of the exhaust valve may need to be replaced.

[0036] Three-way valve 7: Installed downstream of the relief tank 1, it is connected to the rack in parallel with the pressure relief valve 2. The introduction of the three-way valve provides an additional sampling path for the system, facilitating rapid prediction of faults.

[0037] Working principle and fault prediction:

[0038] Under normal working conditions, the air in the air spring pipeline enters the discharge tank 1 through the exhaust valve, and is then released to the frame through the pressure relief valve 2 or the three-way valve 7 (without affecting the system pressure balance).

[0039] When the sealing ring of the exhaust valve is damaged, the hydraulic oil is mixed with air and enters the drain tank 1, and the oil level gradually rises.

[0040] When the liquid level switch 3 detects that the oil level has risen, it triggers the throttle valve 4 to start working, limiting the outflow rate of the oil.

[0041] If the amount of oil released continues to increase, the liquid level alarm 6 triggers an alarm, and the operator can immediately perform fault prediction through the sampling path of the three-way valve 7.

[0042] Sampling is performed through the three-way valve 7. If hydraulic oil overflow is detected, it is confirmed that the sealing ring inside the exhaust valve is damaged; if only air overflows, it may indicate that the liquid level switch or related sensors are faulty.

[0043] Working principle:

[0044] Under normal operating conditions, air in the air spring line flows through the exhaust valve into the relief tank and is then released to the frame through a pressure relief valve or three-way valve. Intelligent sensors monitor system parameters such as fluid level and pressure in real time.

[0045] When the sealing ring of the exhaust valve is damaged, the hydraulic oil is mixed with air and enters the discharge tank, and the liquid level sensor detects the rising oil level and triggers an alarm signal.

[0046] Operators can view real-time data through the remote monitoring platform and predict faults based on the sampling path of the three-way valve. If hydraulic oil overflow is detected, it confirms that the seal ring inside the exhaust valve is damaged; if only air overflows, it may indicate a faulty level sensor.

[0047] The remote monitoring platform can also predict the possibility of failure based on historical data and intelligent algorithms, and provide maintenance recommendations to operators.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air spring piping system for a low-speed marine diesel engine, characterized in that: include: a discharge tank, connected upstream to the exhaust valve of the air cylinder, for receiving and storing oil-laden air discharged from the exhaust valve; a pressure relief valve, disposed downstream of the relief tank, for releasing air into the rack; a liquid level switch, disposed in the inner cavity of the discharge tank, for detecting changes in the liquid level in the discharge tank; a throttle valve, interconnected with the liquid level switch, for regulating the flow of liquid in the discharge tank when the liquid level switch is triggered; A liquid level alarm is installed on the top of the discharge tank, and triggers an alarm signal when the liquid level in the discharge tank reaches a preset threshold; A three-way valve is connected between the discharge tank and the frame, and provides a sampling path for detecting leakage in the discharge tank through a sampling tube when the liquid level alarm triggers an alarm, so as to judge the oil content in the discharge tank (1) and the state of the exhaust valve sealing ring; Among them, when the liquid level in the discharge tank reaches the preset threshold, the liquid level alarm triggers the alarm. The operator can detect the leakage in the discharge tank by detecting the sampling path of the three-way valve. If hydraulic oil overflow is detected, it indicates that the sealing ring of the exhaust valve is damaged; if only air overflow is detected, it indicates that the liquid level switch is damaged.

2. The air spring piping system for a low-speed marine diesel engine according to claim 1, characterized in that: The linkage setting of the liquid level switch and the throttle valve can automatically adjust the opening of the throttle valve when an abnormal liquid level is detected to control the liquid flow in the discharge tank and prevent malfunctions caused by excessively high liquid levels.

3. The air spring piping system for a low-speed marine diesel engine according to claim 1, characterized in that: A sampling valve is provided on the sampling path of the detection three-way valve, which is used to start the sampling operation when needed, so as to facilitate fault prediction and maintenance and repair.

4. The air spring piping system for a low-speed marine diesel engine according to any one of claims 1 to 3, characterized in that: It also includes an intelligent sensor group, including at least one liquid level sensor and one pressure sensor, for monitoring the liquid level and pressure parameters in the discharge tank in real time.

5. The air spring piping system for a low-speed marine diesel engine according to claim 4, characterized in that: It also includes a remote monitoring platform, which is connected to the intelligent sensor group, receives and processes sensor data, and provides fault warning and diagnosis services. Among them, when the sealing ring of the exhaust valve is damaged, causing the hydraulic oil to mix with air and enter the discharge tank, the liquid level sensor detects the rising oil level and triggers an alarm signal. The operator can view real-time data through the remote monitoring platform and use the sampling path of the three-way valve to predict faults.

6. The air spring piping system for a low-speed marine diesel engine according to claim 5, characterized in that: It also includes an adaptive control module that adjusts the opening degree of the three-way valve and / or the flow rate of the throttle valve in real time based on data provided by the intelligent sensor group to achieve more precise pressure control and fault prevention.

7. The air spring piping system for a low-speed marine diesel engine according to claim 5, characterized in that: The remote monitoring platform has a data storage and analysis function module for storing historical data and predicting the possibility of faults based on intelligent algorithms; and a remote configuration, debugging and maintenance function module that allows operators to remotely operate the system and reduce on-site maintenance costs.

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