CN110939523B - Fuel leakage alarm system and fuel system - Google Patents
Fuel leakage alarm system and fuel system Download PDFInfo
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- CN110939523B CN110939523B CN201911387433.6A CN201911387433A CN110939523B CN 110939523 B CN110939523 B CN 110939523B CN 201911387433 A CN201911387433 A CN 201911387433A CN 110939523 B CN110939523 B CN 110939523B
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- alarm
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- 239000000446 fuel Substances 0.000 title claims abstract description 202
- 239000003921 oil Substances 0.000 claims abstract description 353
- 239000000295 fuel oil Substances 0.000 claims abstract description 43
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 239000002828 fuel tank Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The application discloses a fuel leakage alarm system and a fuel system, and relates to the technical field of engines. The fuel oil leakage alarm system comprises a high-pressure oil pipe leakage oil way, an oil sprayer oil return oil way and a fuel oil leakage alarm; the high-pressure oil pipe leakage oil way is connected with the fuel leakage alarm, and the oil sprayer return oil way is connected with the fuel leakage alarm; the fuel oil leakage alarm is used for alarming the burst and oil leakage of the high-pressure oil pipe. The fuel leakage alarm system can realize automatic reset after the fuel system alarms, simplify the pipeline of the whole machine, reduce the fuel leakage points in the using process of the whole machine and reduce the cost of the whole machine.
Description
Technical Field
The application relates to the technical field of engines, in particular to a fuel leakage alarm system and a fuel system.
Background
The high-pressure oil pipe in the marine diesel engine is easy to splash fuel oil to cause fire disaster after bursting. In order to improve the safety of the diesel engine, a pipeline is often added to connect the high-pressure oil pipe and then connect the high-pressure oil pipe to the fuel leakage alarm. Due to the fact that the alarm and one fuel pipeline are added, the simple arrangement of the whole machine is affected, meanwhile, the cost of the whole machine is increased, and meanwhile, an operator is required to manually reset the fuel system after alarming.
Disclosure of Invention
The application provides a fuel leakage alarm system and a fuel system, which can realize automatic reset after the fuel system alarms, simplify a pipeline of a whole machine, reduce fuel leakage points in the using process of the whole machine and reduce the cost of the whole machine.
In a first aspect, a fuel leakage alarm system is provided, the fuel leakage alarm system comprises a high-pressure oil pipe leakage oil path, an oil sprayer oil return path and a fuel leakage alarm; the high-pressure oil pipe leakage oil way is connected with the fuel leakage alarm, and the oil sprayer return oil way is connected with the fuel leakage alarm; the fuel oil leakage alarm is used for alarming the burst and oil leakage of the high-pressure oil pipe.
According to the technical scheme, after the fuel from the daily fuel tank is pressurized by the fuel injection pump, the fuel enters the fuel injector through the high-pressure fuel pipe, and the fuel leakage alarm system connects the high-pressure fuel pipe leakage fuel path and the fuel injector return fuel path to the fuel leakage alarm, so that fuel injector return fuel and high-pressure fuel pipe leakage return fuel (no high-pressure fuel pipe leakage return fuel when the high-pressure fuel pipe is not broken) are jointly connected into the fuel leakage alarm, and then the fuel is discharged from the fuel leakage alarm and enters the fuel collecting tank, so that a pipeline is not required to be additionally arranged to connect the return fuel of the fuel injector to the daily fuel tank, the pipeline of the whole machine is simplified, the fuel leakage point in the using process of the whole machine is reduced, and the cost of the whole machine is reduced.
With reference to the first aspect, in a first possible implementation manner of the first aspect of the present application, the fuel leakage alarm system further includes a merging pipe; the oil return path of the oil injector and the leakage path of the high-pressure oil pipe are connected to a converging pipeline after converging, and the converging pipeline is connected to the fuel leakage alarm.
According to the technical scheme, the oil return oil way of the oil sprayer and the leakage oil way of the high-pressure oil pipe are connected to the converging pipeline after converging, so that the oil return of the oil sprayer and the leakage oil way of the high-pressure oil pipe are jointly connected into the fuel leakage alarm after being combined into a whole at the front end, and only the space of the converging pipeline is reserved in the rear end laying of the system pipeline, so that the pipeline setting of the whole machine is further simplified.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect of the present application, the fuel leakage alarm includes an oil cavity, a floating ball alarm device, a first oil outlet pipe and a second oil outlet pipe; the oil cavity is provided with an oil inlet, and the converging pipeline is connected with the oil inlet; the first oil outlet pipe is connected with the oil cavity; the second oil outlet pipe is arranged in the oil cavity and communicated with the first oil outlet pipe; the floating ball alarm device is arranged in the oil cavity and used for alarming.
According to the technical scheme, when the high-pressure oil pipe is not broken, oil returned by the oil sprayer enters the oil cavity through the oil inlet and is discharged from the oil cavity through the first oil outlet pipe, at the moment, the oil returned amount of the oil sprayer is small, the first oil outlet pipe can meet the requirement that all fuel in the oil cavity is discharged, and the floating ball alarm device can not trigger an alarm; when the high-pressure oil pipe is broken, a large amount of fuel is sprayed out from the high-pressure oil pipe and is converged into the converging pipeline together with the return oil of the oil sprayer, the amount of the fuel which enters the oil cavity from the oil inlet instantaneously increases suddenly, so that the first oil outlet pipe cannot meet the requirement that all the fuel in the oil cavity is discharged in time, the fuel level in the oil cavity is increased, and the floating ball alarm device can trigger an alarm; the second oil outlet pipe can be used for converging the suddenly increased fuel into the first oil outlet pipe, so that the fuel in the oil cavity flows out quickly after triggering alarm, the fuel level in the oil cavity is recovered to be normal, the automatic reset of the floating ball alarm device is realized, and the operation of manual oil discharge reset is avoided.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect of the present application, the first oil outlet pipe is provided with a first oil outlet and a total oil outlet, and the second oil outlet pipe is provided with a second oil outlet; the height of the oil inlet relative to the oil cavity is larger than that of the second oil outlet relative to the oil cavity, the height of the second oil outlet relative to the oil cavity is larger than that of the first oil outlet relative to the oil cavity, the diameter of the second oil outlet is larger than that of the first oil outlet, and the diameter of the total oil outlet is larger than that of the first oil outlet.
According to the technical scheme, the height of the oil inlet relative to the oil cavity is larger than that of the second oil outlet relative to the oil cavity, and the height of the second oil outlet relative to the oil cavity is larger than that of the first oil outlet relative to the oil cavity, so that fuel entering the oil cavity flows into the first oil outlet pipe from the first oil outlet first and is discharged through the first oil outlet pipe, and the fuel flowing under normal conditions that the high-pressure oil pipe is not broken is met; when the high-pressure oil pipe is broken, the diameter of the second oil outlet is larger than that of the first oil outlet, the diameter of the total oil outlet is larger than that of the first oil outlet, and the fuel oil suddenly increased in the oil cavity cannot be timely discharged through the first oil outlet, so that the fuel oil level rises, and the floating ball alarm device rises to trigger an alarm; if the oil drainage amount in the oil cavity is continuously increased, fuel oil can be quickly collected into the second oil outlet pipe from the second oil outlet and collected into the first oil outlet pipe, and finally, the fuel oil is quickly discharged from the total oil outlet, so that the fuel oil level in the oil cavity is recovered to be normal, the automatic reset of the floating ball alarm device is realized, and the operation of manual oil drainage reset is avoided.
With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect of the present application, the floating ball alarm device is a floating ball type liquid level sensor.
According to the technical scheme, the floating ball type liquid level sensor is adopted by the floating ball type alarm device, so that the triggering alarm is more accurate and the response is faster.
In a second aspect, there is provided a fuel system comprising the fuel leak warning system of the first aspect or any one of the possible implementations of the first aspect; the fuel system also comprises a daily oil tank, an oil collecting tank, an oil injection pump, a high-pressure oil pipe and an oil injector; the daily oil tank is connected to the oil injection pump, the oil injection pump is connected to the oil injector through the high-pressure oil pipe, the high-pressure oil pipe leakage oil way is connected to the high-pressure oil pipe, the oil injector return oil way is connected to the oil injector, and the oil collecting tank is connected to the fuel oil leakage alarm.
According to the technical scheme, the fuel oil system adopts the fuel oil leakage alarm system, so that the pipeline of the whole system can be simplified, the fuel oil leakage points in the use process of the fuel oil system are reduced, and the cost is reduced.
With reference to the second aspect, in a first possible implementation manner of the second aspect of the present application, the high-pressure oil pipe is a double-layer oil pipe, and the high-pressure oil pipe leakage oil path is connected to an outer layer of the double-layer oil pipe.
According to the technical scheme, the high-pressure oil pipe adopts the double-layer oil pipe, the high-pressure oil pipe leakage oil path is connected to the outer layer of the double-layer oil pipe, when the inner layer pipe of the high-pressure oil pipe leaks, oil leakage can enter the outer layer pipe, and high-pressure oil leakage is guaranteed to be quickly and safely collected into the high-pressure oil pipe leakage oil path.
With reference to the second aspect, in a second possible implementation manner of the second aspect of the present application, the fuel system further includes a transfer pump; a delivery pump is arranged between the daily oil tank and the oil injection pump; the oil collecting tank is connected with the daily oil tank through a delivery pump.
According to the technical scheme, the flow of fuel can be quickened through the delivery pump, and the service efficiency of a fuel system is improved.
With reference to the second aspect, in a third possible implementation manner of the second aspect of the present application, the fuel system further includes a fuel return line, the fuel return line is connected to the fuel injection pump, and the fuel return line is connected to the daily fuel tank.
According to the technical scheme, the fuel oil return way is used for receiving normal oil drainage in the fuel injection pump and conveying the normal oil drainage to the daily oil tank, so that equipment damage or pollution caused by normal oil drainage is avoided, and meanwhile, the cost is saved.
With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect of the present application, the fuel system further includes a check valve; the fuel oil return way is provided with a check valve, and a check valve is arranged between the daily fuel tank and the fuel injection pump.
According to the technical scheme, the one-way valve is used for preventing the fuel in the fuel pipeline from flowing reversely, so that the use safety of the fuel system is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a fuel leak warning system in accordance with an alternative embodiment of the application;
FIG. 2 is a schematic view of a fuel leak alarm in a first view angle according to an alternative embodiment of the application;
FIG. 3 is a schematic view of a fuel leak alarm in an alternative embodiment of the application at a second view angle;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is a schematic diagram of a fuel system according to an alternative embodiment of the present application.
Icon: I-NO normally open point; II-NC normally closed point; 10-a fuel leakage alarm system; 110-a high-pressure oil pipe leakage oil path; 120-an oil return way of the oil injector; 130-converging the pipes; 140-fuel leakage alarm; 142-oil chamber; 1422-oil inlet; 144-a floating ball alarm device; 1442-floating ball; 1444 level switch; 146-a first flowline; 1462-a first oil outlet; 1464-total oil outlet; 148-a second flowline; 1482-second oil outlet; 20-a fuel system; 22-a fuel oil return way; 210-a daily oil tank; 220-oil collecting tank; 230-an oil injection pump; 240-high pressure oil pipe; 250-an oil injector; 260-a transfer pump; 270-a one-way valve; 280-a fuel filter; 290-shut-off valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put in use of the product of this application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; the two components can be mechanically connected, can be directly connected or can be indirectly connected through an intermediate medium, and can be communicated with each other. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The existing fuel leakage alarm system connects the high-pressure oil drain ports of each high-pressure oil pipe in series through a main oil collecting pipe to form a single fuel oil path, and then is connected with a fuel leakage alarm, so that the high-pressure oil pipe leaks fuel into the fuel leakage alarm, and meanwhile, the alarm needs to manually reset the alarm by discharging the fuel. The oil return of the oil sprayer is connected back to the daily oil tank through a pipeline which is additionally arranged. Because the existing fuel oil leakage alarm system is a single system, a space is required to be reserved for pipeline laying of the system in design, and meanwhile, the arrangement of the whole machine is more complicated and compact, the risk point of oil leakage is increased, and the cost of the whole machine is also increased. When the alarm is manually discharged, the discharged fuel oil needs to be received by an operator by using a container, so that the workload of the operator is increased, and the operation is not very convenient.
An alternative embodiment of the present application provides a fuel leakage alarm system 10, where an oil return path 120 of an oil injector and a leakage path 110 of a high-pressure oil pipe are joined and then connected to a joining pipe 130, so that the oil return of the oil injector 250 and the leakage return of the high-pressure oil pipe 240 are joined together and then are jointly connected to a fuel leakage alarm 140, and only the space of the joining pipe 130 is reserved in the laying of the system pipeline, thereby further simplifying the pipeline arrangement of the whole machine.
Referring first to fig. 1 and 5, fig. 1 shows a schematic configuration of a fuel leakage alarm system 10 according to an alternative embodiment of the present application, and fig. 5 shows a schematic configuration of a fuel system 20 according to another alternative embodiment of the present application.
The fuel leakage alarm system 10 is a part of the fuel system 20 applied to a marine diesel engine and is used for timely alarming abnormal oil leakage of the high-pressure oil pipe 240. The fuel leak warning system 10 includes a high pressure fuel line leak path 110, a fuel injector return path 120, a junction line 130, and a fuel leak warning device 140.
It should be noted that the embodiment of the present application is not limited to the specific application scenario of the fuel system 20, and in other alternative embodiments, the fuel system 20 may be applied to a gasoline engine or other scenarios.
It should be noted that, in the fuel system 20 provided in the embodiment of the present application, two fuel injection pumps 230 and two fuel injectors 250 are provided, the two fuel injection pumps 230 are connected in series through the fuel return line 22, and each fuel injection pump 230 is correspondingly connected to one fuel injector 250. Correspondingly, two split-flow converging pipes 130 are arranged in the fuel system 20, and the two split-flow converging pipes 130 are finally converged into one pipe and then are connected into the fuel leakage alarm 140.
The fuel in the fuel system 20 is delivered from the daily fuel tank 210 to the fuel filter 280 for filtering and then delivered to the fuel injection pump 230, the fuel is pressurized by the fuel injection pump 230 and delivered to the fuel injection nozzle of the fuel injector 250 through the high-pressure fuel pipe 240, and the fuel is atomized into fine particles by the fuel injection nozzle and uniformly injected into the combustion chamber of the diesel engine for combustion.
The high-pressure oil pipe 240 is a double-layer oil pipe, the inner layer pipe of which is used for conveying the pressurized fuel oil, and the outer layer pipe of which is used for receiving the leaked fuel oil after the inner layer pipe is broken, so that the fire disaster caused by the splashing of the fuel oil after the inner layer pipe is broken is prevented. The high-pressure oil pipe leakage oil path 110 and the oil injector oil return oil path 120 are small-section pipelines, wherein the specifications and materials of the pipelines can be selected according to actual requirements. One end of the high-pressure oil pipe leakage oil path 110 is connected to an outer pipe of the double-layer oil pipe, and the other end of the high-pressure oil pipe leakage oil path 110 is connected to the converging pipe 130. One end of the injector return oil path 120 is connected to the injector 250, and the other end of the injector return oil path 120 is connected to the converging pipe 130. Wherein the converging pipe 130 may be connected to the injector return oil passage 120 and the high-pressure oil pipe leakage oil passage 110, respectively, through a tee joint. The junction conduit 130 is disposed within a cylinder head (not shown) of the fuel system 20, and the junction conduit 130 is in turn connected to a fuel leak alarm 140.
The fuel leakage alarm system 10 connects the high-pressure fuel pipe leakage oil way 110 and the fuel injector oil return oil way 120 to the fuel leakage alarm 140, so that the fuel oil of the fuel injector 250 and the fuel oil of the high-pressure fuel pipe 240 are jointly connected into the fuel leakage alarm 140 (no fuel oil is leaked from the high-pressure fuel pipe 240 when the high-pressure fuel pipe 240 is not broken), and then the fuel oil flows out of the fuel leakage alarm 140 into the fuel collecting tank 220, so that the fuel oil of the fuel injector 250 is connected back to the daily fuel tank 210 without arranging a pipeline in addition, the pipeline of the whole machine is simplified, the fuel oil leakage point in the using process of the whole machine is reduced, and the cost of the whole machine is reduced.
With continued reference to fig. 2-4, fig. 2 illustrates a specific structure of the fuel leakage alarm 140 according to an alternative embodiment of the present application at a first viewing angle, fig. 3 illustrates a specific structure of the fuel leakage alarm 140 according to an alternative embodiment of the present application at a second viewing angle, and fig. 4 illustrates a cross-sectional structure in A-A in fig. 3.
Fuel leak alarm 140 includes an oil chamber 142, a float ball alarm 144, a first drain 146, and a second drain 148.
The oil chamber 142 has an oil inlet 1422 at an upper position of a side wall thereof, and the converging duct 130 (see fig. 1) is connected to the oil inlet 1422. First oil outlet pipe 146 is connected to the bottom of oil chamber 142, first oil outlet pipe 146 is provided with a first oil outlet 1462 and a total oil outlet 1464, first oil outlet 1462 is located inside oil chamber 142, and total oil outlet 1464 is located outside oil chamber 142 and connected to oil collecting tank 220 (see fig. 5) through a pipe. The second oil outlet pipe 148 is disposed in the oil cavity 142 and vertically connected to the first oil outlet pipe 146, a second oil outlet 1482 is disposed at an upper end of the second oil outlet pipe 148, and a height of the second oil outlet 1482 is smaller than a height of the oil inlet 1422. Second oil outlet 1482 has a diameter greater than that of first oil outlet 1462 and total oil outlet 1464 has a diameter greater than that of first oil outlet 1462.
The float ball alarm device 144 is a float ball 1442 type liquid level sensor, and comprises a float ball 1442 and a liquid level switch 1444, wherein the liquid level switch 1444 is arranged at the upper end of the oil cavity 142 and is connected with an alarm (not shown in the figure) outside the oil cavity 142 through a cable. Float ball 1442 is suspended above the fuel level within oil chamber 142. When the floating ball alarming device 144 is installed, a water level line is calibrated in the oil cavity 142: NO normally open point I and NC normally closed point II. When the floating ball 1442 rises to the NO normally open point I, the liquid level switch 1444 is connected with the alarm to trigger alarm; when the floating ball 1442 descends to the NC normally closed point II, the liquid level switch 1444 can be disconnected from the alarm to realize automatic resetting of the alarm.
Referring to fig. 1,3 and 4, when the high-pressure oil pipe 240 is not broken, the return oil of the injector 250 enters the oil cavity 142 through the oil inlet 1422, and at this time, the return oil amount of the injector 250 is smaller, so that the fuel oil entering the oil cavity 142 flows into the first oil outlet pipe 146 from the first oil outlet 1462 and is discharged through the first oil outlet pipe 146, thereby meeting the fuel oil flow under the normal condition that the high-pressure oil pipe 240 is not broken. And at this time, the fuel oil in the oil cavity 142 is less, so that the floating ball 1442 is positioned below the normally closed point II of NC and can not trigger the alarm to give an alarm.
When the high-pressure oil pipe 240 is broken, a large amount of fuel is ejected from the high-pressure oil pipe 240 and is merged into the merging pipe 130 together with return oil of the injector 250, and the amount of fuel instantaneously entering the oil chamber 142 from the oil inlet 1422 increases abruptly. Because the diameter of the first oil outlet 1462 is smaller, the fuel suddenly increased in the oil cavity 142 cannot be timely discharged through the first oil outlet 1462, and the first oil outlet pipe 146 cannot meet the requirement that all the fuel in the oil cavity 142 is timely discharged, so that the fuel liquid level in the oil cavity 142 is increased, and the floating ball 1442 rises to the NO normally open point I to trigger an alarm. If the amount of drain oil entering the oil chamber 142 continues to increase, the fuel level continues to rise, and fuel rapidly flows from the second oil outlet 1482 into the second oil outlet 148 and into the first oil outlet 146, so that the fuel in the oil chamber 142 rapidly flows out after triggering an alarm.
After the fault is repaired, the high-pressure oil pipe 240 is not leaked any more, the amount of fuel entering the oil cavity 142 is reduced, the fuel level in the oil cavity 142 is restored to be below the NC normally closed point II through the cooperation of the second oil outlet pipe 148, and the alarm is automatically released at the moment, so that the automatic reset of the floating ball alarm device 144 is realized, and the operation of manual oil discharge reset is avoided.
Referring to fig. 5 and 1, another embodiment of the present application further provides a fuel system 20, where the fuel system 20 includes a fuel leakage alarm system 10, a fuel return line 22, a day tank 210, a sump tank 220, a fuel injection pump 230, a high pressure fuel pipe 240, a fuel injector 250, a check valve 270, a delivery pump 260, a fuel filter 280, and a shut-off valve 290.
The fuel system 20 is provided with two fuel injection pumps 230 and two fuel injectors 250, the two fuel injection pumps 230 are connected in series through a fuel return oil path 22, the fuel return oil path 22 is a fuel oil path, the fuel return oil path 22 is connected to the daily fuel tank 210, and a check valve 270 for preventing backflow is arranged on the fuel return oil path 22. The fuel leakage alarm 140 of the fuel leakage alarm system 10 is connected to the fuel collecting tank 220 through a pipe, and the inlet end of the fuel collecting tank 220 is lower than the total outlet 1464 of the fuel leakage alarm 140 (refer to fig. 3). The sump tank 220 is connected to the daily oil tank 210 again through a pipe, and a shut-off valve 290 and a transfer pump 260 are provided on this pipe so that the drain oil collected in the sump tank 220 flows into the daily oil tank 210. The day tank 210 delivers fuel to the fuel filter 280 through a pipe, and a shutoff valve 290 and a delivery pump 260 and a check valve 270 are provided on this pipe. The fuel filter 280 is in turn connected to the fuel injection pump 230.
The fuel oil system 20 adopts the fuel oil leakage alarm system 10, and can simplify the pipeline of the whole system, thereby reducing the fuel oil leakage points in the use process of the fuel oil system 20 and lowering the cost. The flow of fuel through the transfer pump 260 can be increased to increase the efficiency of use of the fuel system 20.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. A fuel leakage alarm system, characterized by:
The device comprises a high-pressure oil pipe leakage oil way, an oil sprayer oil return oil way and a fuel oil leakage alarm;
The high-pressure oil pipe leakage oil way is connected with the fuel oil leakage alarm, and the oil sprayer oil return oil way is connected with the fuel oil leakage alarm;
The fuel oil leakage alarm is used for alarming burst oil leakage of the high-pressure oil pipe;
The fuel leakage alarm system further comprises a converging pipeline;
The oil return path of the oil sprayer and the leakage path of the high-pressure oil pipe are connected to the converging pipeline after converging, and the converging pipeline is connected to the fuel leakage alarm;
The fuel leakage alarm comprises an oil cavity, a floating ball alarm device, a first oil outlet pipe and a second oil outlet pipe;
The oil cavity is provided with an oil inlet, and the converging pipeline is connected to the oil inlet;
The first oil outlet pipe is connected with the oil cavity;
The second oil outlet pipe is arranged in the oil cavity and communicated with the first oil outlet pipe;
The floating ball alarm device is arranged in the oil cavity and used for alarming;
The first oil outlet pipe is provided with a first oil outlet and a total oil outlet, and the second oil outlet pipe is provided with a second oil outlet;
The height of the oil inlet relative to the oil cavity is larger than that of the second oil outlet relative to the oil cavity, the height of the second oil outlet relative to the oil cavity is larger than that of the first oil outlet relative to the oil cavity, the diameter of the second oil outlet is larger than that of the first oil outlet, and the diameter of the total oil outlets is larger than that of the first oil outlet;
the floating ball alarm device is a floating ball type liquid level sensor.
2. A fuel system, characterized by:
The fuel system comprising the fuel leak warning system of claim 1;
the fuel system also comprises a daily oil tank, an oil collecting tank, an oil injection pump, a high-pressure oil pipe and an oil injector;
The daily oil tank is connected with the oil injection pump, the oil injection pump is connected with the oil injector through the high-pressure oil pipe, the high-pressure oil pipe leakage oil way is connected with the high-pressure oil pipe, the oil injector return oil way is connected with the oil injector, and the oil collecting tank is connected with the fuel oil leakage alarm.
3. The fuel system of claim 2, wherein:
the high-pressure oil pipe is a double-layer oil pipe, and the high-pressure oil pipe leakage oil path is connected to the outer layer of the double-layer oil pipe.
4. The fuel system of claim 2, wherein:
the fuel system further comprises a transfer pump;
The conveying pump is arranged between the daily oil tank and the oil injection pump;
The oil collecting tank is connected with the daily oil tank through the delivery pump.
5. The fuel system of claim 2, wherein:
The fuel system further comprises a fuel return oil way, wherein the fuel return oil way is connected with the fuel injection pump, and the fuel return oil way is connected with the daily oil tank.
6. The fuel system of claim 5, wherein:
The fuel system further comprises a one-way valve;
The fuel return oil way is provided with the one-way valve, and the one-way valve is arranged between the daily oil tank and the fuel injection pump.
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| CN201911387433.6A CN110939523B (en) | 2019-12-27 | 2019-12-27 | Fuel leakage alarm system and fuel system |
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| CN116717370B (en) * | 2023-06-21 | 2024-03-12 | 沪东重机有限公司 | Fuel leakage monitoring device for emergency diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111691999A (en) * | 2020-06-23 | 2020-09-22 | 潍柴动力股份有限公司 | Method and device for diagnosing leakage of common rail system |
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| JP4042058B2 (en) * | 2003-11-17 | 2008-02-06 | 株式会社デンソー | Fuel injection device for internal combustion engine |
| CN201170743Y (en) * | 2008-02-14 | 2008-12-24 | 江苏科技大学 | A fuel oil leakage collection alarm device |
| JP5353670B2 (en) * | 2009-12-07 | 2013-11-27 | 株式会社デンソー | Fuel injection control device |
| CN201695437U (en) * | 2010-06-13 | 2011-01-05 | 中外合资沃得重工（中国）有限公司 | Auxiliary device for replacing fuel filter of excavating machine |
| CN202250513U (en) * | 2011-08-29 | 2012-05-30 | 东风汽车有限公司 | Automatic exhaust fuel system |
| CN104481764B (en) * | 2014-11-25 | 2016-10-26 | 中国船舶重工集团公司第七一一研究所 | A kind of heavy oil common rail system of carry potential overflow valve |
| CN106523151A (en) * | 2016-12-27 | 2017-03-22 | 中国船舶重工集团公司第七研究所 | Fuel oil leakage positioning system and fuel oil leakage alarm system for marine diesel engine |
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| CN111691999A (en) * | 2020-06-23 | 2020-09-22 | 潍柴动力股份有限公司 | Method and device for diagnosing leakage of common rail system |
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