Liquid level height adjustable structure for transverse fuel oil leakage alarm sensor
By setting a semi-cylindrical conversion shaft with adjustable liquid level height in the fuel leakage alarm sensor, the problem of small fuel leakage in the transverse state does not reach the intermediate electrode, effectively monitoring and alarming of fuel leakage is achieved, and improvement costs are reduced.
Patent Information
- Application Number
- CN202422346118.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The fuel leakage alarm sensor is in a transverse state and the fuel leakage amount is small, and the liquid level fails to reach the intermediate electrode, so the effective alarm cannot be issued.
A liquid level height adjustable structure for transverse fuel leakage alarm sensor is designed. By setting up a semi-cylindrical conversion shaft to rotate in the fuel leakage return channel, raising or lowering the fuel liquid level to ensure that the liquid level reaches the intermediate electrode to achieve alarm.
Effective monitoring of fuel leakage is achieved in the transverse state, reducing the cost of structural improvement, expanding the scope of application of sensors, and ensuring the normal operation of the fuel leakage alarm function.
Smart Images
Figure CN223122435U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of marine diesel engine alarm devices, and particularly relates to a structure with adjustable liquid level height for a horizontally-mounted fuel leakage alarm sensor. Background Technique
[0002] The statements here only provide the background technique related to the utility model, and do not necessarily constitute the prior art.
[0003] When the diesel engine on a ship is running, if a high-pressure fuel pipeline leaks, high-pressure fuel will be sprayed onto the machine surface. Since both the fuel itself and the machine surface have relatively high temperatures, it may cause a fire. At the same time, the sprayed fuel may also injure the ship's crew. Therefore, to prevent the high-pressure fuel pipe from rupturing, fuel from splashing onto the high-temperature surface of the machine and causing a fire, as well as preventing injury from spraying, the convention and regulations require that the high-pressure fuel pipeline between the high-pressure fuel pump and the fuel nozzle of the marine diesel engine be equipped with a casing pipeline system or appropriate enclosure protection. The high-pressure fuel pipe casing pipeline system consists of two parts: a casing assembly and a fuel leakage alarm device. There is a certain gap between the high-pressure fuel pipe and the casing. When the high-pressure fuel pipe ruptures, fuel can flow out from this gap, gather into the leakage main pipe, and flow into the fuel leakage collection container.
[0004] The fuel leakage alarm sensor is installed on the leakage main pipe. The fuel leakage branch pipes of each cylinder gather into the main pipe and flow into the fuel leakage collection container, causing changes in liquid level, pressure, etc., thereby triggering the sensor to alarm. According to the working principle, fuel leakage alarm sensors are usually divided into capacitive, resistive, or optical types. The working principle of a capacitive fuel leakage alarm sensor is that the change in the liquid level between the two electrodes of the sensor causes a change in the capacitance between the electrodes. During actual installation, due to the small installation space of the sensor, sometimes the sensor needs to be horizontally mounted. As Figure 4 shown, when the sensor is horizontally mounted, the liquid level needs to reach the middle electrode 201 of the sensor for the sensor to receive a signal. If the fuel leakage volume is small and the liquid level is discharged before reaching the middle electrode of the sensor, the sensor cannot achieve the function of fuel leakage alarm. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a structure with adjustable liquid level height for a horizontally-mounted fuel leakage alarm sensor, which can solve the problem that when the fuel leakage alarm sensor is used in a horizontally-mounted state, due to the small fuel leakage volume, the liquid level does not reach the middle electrode and the alarm cannot be carried out.
[0006] To achieve the above purpose, the utility model is realized through the following technical solutions:
[0007] In a first aspect, an embodiment of the present utility model provides a liquid level adjustable structure for a horizontal fuel leakage alarm sensor, which includes a distribution block. A fuel leakage return oil passage is provided on the distribution block. One end of the fuel leakage return oil passage is installed with a fuel leakage alarm sensor, and the other end is connected to a fuel return pipe. A conversion shaft is installed at a position of the fuel leakage return oil passage close to the fuel return pipe. The conversion shaft is in a semi-cylindrical shape, and the axis of the conversion shaft is perpendicular to the axis of the fuel leakage return oil passage. The conversion shaft can rotate in the fuel leakage return oil passage, thereby raising or lowering the fuel liquid level.
[0008] As a further technical solution, two limit screws are provided on the distribution block, and the two limit screws are symmetrically arranged up and down.
[0009] As a further technical solution, the end of the limit screw can extend into the groove of the conversion shaft to position the conversion shaft.
[0010] As a further technical solution, the conversion shaft is installed on the distribution block through a sleeve. The axis of the sleeve is perpendicular to the axis of the fuel leakage return oil passage. The conversion shaft is placed inside the sleeve, and the end of the conversion shaft extends into the fuel leakage return oil passage.
[0011] As a further technical solution, a first oil drain hole and a second oil drain hole are provided on the sleeve, and the first oil drain hole and the second oil drain hole are symmetrically arranged up and down.
[0012] As a further technical solution, a hinged pipe joint is sleeved outside the first oil drain hole and the second oil drain hole provided on the sleeve.
[0013] As a further technical solution, the pipe interface of the hinged pipe joint is connected to an oil drain collection pipe.
[0014] As a further technical solution, a first fixing hole and a second fixing hole are further provided on the distribution block.
[0015] As a further technical solution, an indicating needle is provided on the end face of the conversion shaft to indicate the position state of the conversion shaft.
[0016] As a further technical solution, when the lower half of the conversion shaft is placed in the fuel leakage return oil passage, the fuel liquid level is raised until the fuel liquid level reaches the middle electrode of the fuel leakage alarm sensor for fuel leakage monitoring. When the upper half of the conversion shaft is placed in the fuel leakage return oil passage, the fuel liquid level in the fuel leakage alarm sensor is lowered for fuel drainage.
[0017] The beneficial effects of the above embodiments of the present utility model are as follows:
[0018] The liquid level height adjustable structure provided by the present utility model is proposed for the fuel leakage alarm sensor when used horizontally. By setting the conversion shaft into a semi-cylindrical shape, the rotating shaft can be adjusted to the corresponding position according to the operating state of the engine. When the engine is running, the conversion shaft is located at the bottom of the fuel leakage return oil passage. If there is fuel leakage, the conversion shaft controls the liquid level to rise. When the liquid level reaches the middle electrode of the sensor, a leakage alarm is triggered. When the engine stops and the oil is drained, the conversion shaft is located at the top of the fuel leakage return oil passage, lowering the height of the fuel liquid level to ensure complete oil drainage.
[0019] The liquid level height adjustable structure provided by the present utility model does not need to change the structure of the fuel leakage alarm sensor. Only by setting a conversion shaft on the fuel leakage return oil passage of the distribution block can the requirement of the horizontally arranged fuel leakage alarm sensor for the fuel liquid level height be realized. The whole structure is simple and easy to implement, and reduces the cost of structural improvement. At the same time, it ensures that the fuel leakage alarm sensor can also monitor fuel leakage in the horizontally arranged state, improving the applicable range of the fuel leakage alarm sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The schematic diagrams forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.
[0021] Figure 1 is a schematic diagram of the overall joint of the liquid level height adjustable structure of the present utility model;
[0022] Figure 2 is a schematic diagram of the position of the conversion shaft under normal working conditions;
[0023] Figure 3 is a schematic diagram of the position of the conversion shaft under the oil drainage state;
[0024] Figure 4 is a schematic diagram of the structure of the fuel leakage alarm sensor in the prior art.
[0025] The schematic diagrams are only for illustration;
[0026] Among them, 1. Distribution block; 101. Fuel leakage return oil passage; 102. Pipe interface; 103. First oil drainage hole; 104. Second oil drainage hole; 105. First fixing hole; 106. Second fixing hole; 2. Fuel leakage alarm sensor; 201. Middle electrode; 3. Conversion shaft; 301. Groove; 302. Indicator needle; 4. Limit screw; 5. Articulated pipe joint; 6. Fuel return pipe; 7. Sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.
[0028] Embodiment 1
[0029] For the capacitive fuel leakage alarm sensor with the existing structure, when it is used in the horizontal state, when the fuel leakage amount is small and the liquid level does not reach the intermediate electrode, there is a problem that the alarm cannot be carried out. In a typical implementation manner of the present utility model, a liquid level height adjustable structure for a horizontal fuel leakage alarm sensor is provided, as Figure 1 shown, including a distribution block 1, a fuel leakage return oil channel 101 is provided on the distribution block, one end of the fuel leakage return oil channel 101 is installed with a fuel leakage alarm sensor 2, and the other end is connected to a fuel return pipe 6; a conversion shaft 3 is installed at a position of the fuel leakage return oil channel 101 close to the fuel return pipe, the conversion shaft is in a semi-cylindrical shape, and the axis of the conversion shaft 3 is perpendicular to the axis of the fuel leakage return oil channel 101; the conversion shaft 3 can rotate in the fuel leakage return oil channel 101, thereby raising or lowering the fuel liquid level.
[0030] In this embodiment, two limit screws 4 are provided on the distribution block 1, and the two limit screws 4 are symmetrically arranged up and down. Further, the end of the limit screw 4 can extend into the groove 301 of the conversion shaft 3 to position the conversion shaft 3.
[0031] Further, the conversion shaft 3 is installed on the distribution block 1 through a sleeve 7, the axis of the sleeve 7 is perpendicular to the axis of the fuel leakage return oil channel 101, the conversion shaft 3 is placed in the sleeve 7, and the end of the conversion shaft 3 extends into the fuel leakage return oil channel 101. The high-pressure oil pipe of a marine engine is a double-layer oil pipe, and the external oil pipe of the double-layer oil pipe is used to transport the leaked oil. When leakage monitoring is carried out, a plurality of double-layer oil pipes lead the leaked fuel to the inside of the distribution block 1 through the fuel return pipe 6 and finally converge at the fuel leakage alarm sensor 2.
[0032] In this embodiment, a first oil drain hole 103 and a second oil drain hole 104 are provided on the sleeve 7, the first oil drain hole 103 and the second oil drain hole 104 are symmetrically arranged up and down, and an articulated pipe joint 5 is sleeved outside the sleeve 7 where the first oil drain hole 103 and the second oil drain hole 104 are provided, and the pipe interface 102 of the articulated pipe joint 5 is connected to an oil drain collection pipe. The fuel leaked under the normal working state of the engine is collected through the provided first oil drain hole 103, and the oil is drained through the provided second oil drain hole 104 to ensure that the oil is drained cleanly.
[0033] In this embodiment, a first fixing hole 105 and a second fixing hole 106 are further provided on the distribution block 1, and the distribution block is fixed at a proper position through the two fixing holes.
[0034] Further, the part of the conversion shaft 3 located inside the sleeve 7 and the fuel leakage return oil passage 101 is semi-cylindrical, and the end of the conversion shaft away from the fuel leakage return oil passage 101 is cylindrical to block the end of the sleeve. An indicating needle 302 is arranged on the end face of the conversion shaft 3 to indicate the position state of the conversion shaft 3, so as to ensure that the conversion shaft is adjusted to different positions according to different working states, realizing leakage alarm or oil discharge.
[0035] The structure and installation method of the fuel leakage alarm sensor mentioned in this embodiment are both existing structures. The key point of the liquid level height adjustable structure is to change the height of the leaked fuel liquid level through the arranged conversion shaft to ensure that the leaked fuel liquid level can reach the middle electrode of the sensor. The specific working principle is as follows:
[0036] When the engine is running, the conversion shaft maintains the "ON" state, and the conversion shaft is placed in the lower half of the fuel leakage return oil passage. Lock the limit screw. If there is fuel leakage, the conversion shaft raises the fuel liquid level in the fuel leakage return oil passage of the distribution block (only when the fuel liquid level in the fuel leakage return oil passage is higher than the upper surface of the conversion shaft, the leaked fuel can enter the sleeve and then be discharged from the first oil discharge hole at the upper part of the sleeve, which is equivalent to raising the fuel liquid level in the fuel leakage return oil passage). When the fuel liquid level reaches the middle electrode of the fuel leakage alarm sensor, fuel leakage monitoring is carried out, and a leakage alarm is given. At the same time, the leaked fuel is discharged through the leakage oil discharge hole at the upper part of the sleeve;
[0037] When the engine stops and discharges oil, the conversion shaft is adjusted to the "OFF" state, and the conversion shaft is placed in the upper half of the fuel leakage return oil passage. Lock the limit screw, and the fuel is discharged from the oil discharge hole at the lower part of the sleeve to ensure complete oil discharge.
[0038] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A liquid level height adjustable structure for a horizontally-mounted fuel leakage alarm sensor, characterized in that, It includes a distribution block, on which a fuel leakage return oil passage is provided. One end of the fuel leakage return oil passage is equipped with a fuel leakage alarm sensor, and the other end is connected to a fuel return pipe. At a position near the fuel return pipe in the fuel leakage return oil passage, a conversion shaft is installed. The conversion shaft is semi-cylindrical in shape, and the axis of the conversion shaft is perpendicular to the axis of the fuel leakage return oil passage. The conversion shaft can rotate in the fuel leakage return oil passage, thereby raising or lowering the fuel liquid level.
2. The liquid level height adjustable structure for the horizontally-mounted fuel leakage alarm sensor according to claim 1, characterized in that, Two limit screws are provided on the distribution block, and the two limit screws are symmetrically arranged vertically.
3. The liquid level height adjustable structure for the horizontally-mounted fuel leakage alarm sensor according to claim 2, wherein, The end of the limit screw can extend into the groove of the conversion shaft to position the conversion shaft.
4. The liquid level height adjustable structure for the horizontally placed fuel leakage alarm sensor according to claim 1, characterized in that, The conversion shaft is installed on the distribution block through a sleeve. The axis of the sleeve is perpendicular to the axis of the fuel leakage return oil passage. The conversion shaft is placed inside the sleeve, and the end of the conversion shaft extends into the fuel leakage return oil passage.
5. The liquid level height adjustable structure for a horizontally-mounted fuel leakage alarm sensor according to claim 4, characterized in that, The sleeve is provided with a first oil drain hole and a second oil drain hole, and the first oil drain hole and the second oil drain hole are symmetrically arranged vertically.
6. The liquid level height adjustable structure for a horizontally-mounted fuel leakage alarm sensor according to claim 5, characterized in that, An articulated pipe joint is sleeved outside the first oil drain hole and the second oil drain hole provided on the sleeve.
7. The liquid level height adjustable structure for a horizontally mounted fuel leakage alarm sensor according to claim 6, characterized in that, The pipe interface of the articulated pipe joint is connected to an oil drain collection pipe.
8. The liquid level height adjustable structure for a horizontally-mounted fuel leakage alarm sensor according to claim 1, wherein The distribution block is also provided with a first fixing hole and a second fixing hole.
9. The liquid level height adjustable structure for a horizontally-mounted fuel leakage alarm sensor according to claim 1, characterized in that, An indicating needle is provided on the end face of the conversion shaft to indicate the position state of the conversion shaft.
10. The liquid level height adjustable structure for a horizontally-mounted fuel leakage alarm sensor according to claim 1, characterized in that, When the conversion shaft is placed in the lower half of the fuel leakage return oil passage, the fuel liquid level is raised, and the fuel liquid level reaches the middle electrode of the fuel leakage alarm sensor for fuel leakage monitoring. When the conversion shaft is placed in the upper half of the fuel leakage return oil passage, the fuel liquid level in the fuel leakage alarm sensor is lowered for fuel drainage.