Device for preventing false alarm of diesel engine oil mist detector

Abstract

The utility model discloses a device for preventing a false alarm of a diesel engine oil mist detector, and relates to the technical field of diesel engine oil mist detectors. The oil mist outlet pipeline is communicated with the top of the box body; the inlet pipeline is communicated with the bottom of the box body; the oil mist separation mechanism is detachably assembled in the box body, and a top port of the inlet pipeline corresponds to the oil mist separation mechanism in position; according to the diesel engine oil mist detection device, oil mist is separated and collected through the inverted-Y-shaped disc set, the back pressure of a crankcase cannot be increased, meanwhile, oil drops gathered on the pipe wall of a pipeline above are prevented from directly falling into a detection area of an oil mist detector, and therefore false alarm of the oil mist detector is prevented, and the defects of an existing diesel engine oil mist detection technology are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engine oil mist detectors, and more specifically to a device for preventing diesel engine oil mist detectors from false alarms. Background Art

[0002] According to the requirements of the SOLAS Convention, internal combustion engines of 2250Kw and above or internal combustion engines with a cylinder bore greater than 300mm should be equipped with a crankcase oil mist detection device or an engine bearing temperature monitor or an equivalent device. Therefore, whether it is a diesel engine for generating electricity on an offshore oil and gas platform or a diesel engine for ship propulsion, most high-power diesel engines are equipped with oil mist detectors to detect the oil mist concentration in the crankcase and judge the healthy state of the diesel engine. When the oil mist exceeds the normal concentration value, an alarm will be issued, and a load reduction or parking signal will be issued to ensure the safe operation of the diesel engine. Studies have shown that the oil mist in the crankcase is composed of some oil particles with a diameter of only 1-10 microns. It is mainly produced from two aspects. One is the mechanical atomization of the lubricating oil by the moving parts; the other is the condensation of the lubricating oil after being heated and vaporized.

[0003] There are many ways to install the diesel engine oil mist detector according to its working principle. One of them is to locate it at the crankcase vent pipe outlet. When the diesel engine is running, due to factors such as cylinder leakage, the pressure inside the crankcase will be slightly greater than the external atmospheric pressure. In this way, the oil mist inside the crankcase will pass through the vent pipe outlet-oil mist detector-armored hose-upper pipeline, and finally lead to the safe area outside the diesel engine room.

[0004] During the circulation of oil mist, due to the viscosity of oil particles and gravity, some oil mist particles will adhere to the pipe wall and continue to gather and "grow", eventually forming oil droplets that fall to the detection area of ​​the oil mist detector below, causing the oil mist detector to detect high concentrations of oil mist and sound an alarm to reduce the load or even shut down the diesel engine.

[0005] Practice has shown that the longer the vertical pipe section above the oil mist detector is and the longer the unit runs continuously, the more obvious the above phenomenon is and the greater the probability of the oil mist detector issuing a false alarm. Therefore, some diesel engine manufacturers even require that the above pipelines be cleaned every week of diesel engine operation, which increases the amount of on-site work but cannot completely avoid false alarms.

[0006] In order to prevent the occurrence of false alarms of oil mist detectors as much as possible, the current practices are: ① The diesel engine is shut down for maintenance and cleaning after every week of operation, that is, after removing the armored hose, the detector, hose, and accessible pipelines are manually cleaned. Since the pipe diameter is only 4 inches, only the pipe section about 0.5m above the flange mouth can be cleaned, and the parts farther from the flange mouth cannot be cleaned; ② Every year, some pipelines are dismantled and thoroughly cleaned. Since the pipelines are located at high altitudes, scaffolding needs to be built, so a single machine takes 3 people x 3 days = 9 man-days, and the labor cost is about 9 man-days x 1,500 yuan / man-day = 13,500 yuan. The total annual cost of four machines is about 54,000 yuan. This method can achieve the purpose of thoroughly cleaning this section of the pipeline, but the pipe section connected to the diesel engine room body still cannot be cleaned, and there is a high risk of high-altitude operations.

[0007] Based on the above problems, we provide a device to prevent diesel engine oil mist detector from false alarm.

[0008] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the utility model, therefore, it may include prior art that is not known to ordinary technicians in this field. Utility Model Content

[0009] In order to solve the problems raised in the above background technology, the utility model provides a device for preventing a diesel engine oil mist detector from giving a false alarm.

[0010] The utility model provides a device for preventing a diesel engine oil mist detector from falsely alarming, which adopts the following technical scheme:

[0011] A device for preventing a diesel engine oil mist detector from giving a false alarm comprises a box; an oil mist outlet pipeline connected to and arranged at the top of the box; an inlet pipeline connected to and arranged at the bottom of the box; an oil mist separation mechanism detachably assembled inside the box, and a top port of the inlet pipeline corresponds to a position of the oil mist separation mechanism; and a discharge pipe connected to and arranged at the bottom of the box.

[0012] Preferably, two L-shaped support bars are symmetrically fixed inside the box body for supporting the oil mist separation mechanism.

[0013] Preferably, the oil mist separation mechanism includes two herringbone mounting bars, a plurality of discs are fixedly mounted between the two herringbone mounting bars, the herringbone mounting bars are fixedly mounted in the box by screws, and two L-shaped support bars are in contact with the herringbone mounting bars.

[0014] Preferably, the discs are symmetrically arranged between two herringbone mounting strips, and the number of the discs is sixteen.

[0015] Preferably, the discs on one side are arranged at an inclination angle of thirty degrees, and the discs on the other side are arranged at an inclination angle of one hundred and fifty degrees.

[0016] Preferably, the front of the box body is detachably equipped with a cover plate.

[0017] In summary, the utility model includes the following beneficial technical effects:

[0018] 1. By using the "human"-shaped disc group to separate and collect the oil mist, the crankcase back pressure will not be increased, and the oil droplets gathered on the upper pipeline wall will be prevented from falling directly into the oil mist detector detection area, thereby preventing the oil mist detector from false alarms, filling the gap in the existing diesel engine oil mist detection technology;

[0019] 2. The entire device is installed at the outlet section of the armored hose at the outlet of the oil mist detector, minimizing the straight pipe section that may cause oil mist accumulation;

[0020] 3. Just add a box with a "human" shaped disc group inside between the existing armored hose outlet flange and the upper pipe section. The subsequent operation and maintenance is simple. You only need to check and clean the separation disc group regularly, which can reduce the unit downtime maintenance.

[0021] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a device for preventing a diesel engine oil mist detector from giving a false alarm in an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the other side of a device for preventing a diesel engine oil mist detector from giving a false alarm in an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure of a device for preventing a diesel engine oil mist detector from giving a false alarm in an embodiment of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the oil mist separation mechanism in the embodiment of the utility model.

[0026] Explanation of the reference numerals: 1. housing; 2. oil mist outlet pipeline; 3. inlet pipeline; 4. oil mist separation mechanism; 400. herringbone mounting strip; 401. disc; 5. discharge pipe; 6. L-shaped support strip; 7. cover plate. DETAILED DESCRIPTION

[0027] The following is combined with Figures 1 to 4 The utility model is described in further detail.

[0028] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0029] The utility model discloses a device for preventing a diesel engine oil mist detector from falsely alarming. Figures 1 to 4 A device for preventing a diesel engine oil mist detector from giving a false alarm comprises a housing 1; an oil mist outlet pipeline 2, which is connected and arranged at the top of the housing 1; an inlet pipeline 3, which is connected and arranged at the bottom of the housing 1, and the inlet pipeline 3 is bolted to the flange at the upper end of the armored hose through a flange, so as to facilitate regular cleaning of the armored hose; an oil mist separation mechanism 4, which is detachably assembled inside the housing 1, and the top port of the inlet pipeline 3 corresponds to the position of the oil mist separation mechanism 4; and a discharge pipe 5, which is connected and arranged at the bottom of the housing 1.

[0030] Specifically, two L-shaped support bars 6 are symmetrically fixed inside the box body 1 for supporting the oil mist separation mechanism 4 .

[0031] Specifically, the oil mist separation mechanism 4 includes two herringbone mounting bars 400, between which a plurality of discs 401 are fixedly mounted. The herringbone mounting bars 400 are fixedly mounted in the housing 1 by screws, and two L-shaped support bars 6 are in contact with the herringbone mounting bars 400.

[0032] Specifically, the discs 401 are symmetrically arranged between the two herringbone mounting bars 400 , and the number of the discs 401 is sixteen.

[0033] The disc 401 is used to separate and collect the oil mist at the outlet of the diesel engine oil mist detector to prevent the oil droplets gathered on the pipe wall of the upper pipeline from directly falling into the detection area of ​​the oil mist detector, thereby preventing the oil mist detector from falsely alarming.

[0034] Specifically, the discs 401 on one side are arranged at an inclination angle of thirty degrees, and the discs 401 on the other side are arranged at an inclination angle of one hundred and fifty degrees.

[0035] Specifically, the front of the box body 1 is detachably equipped with a cover plate 7 .

[0036] The device integrates the separation, collection and discharge of diesel engine crankcase oil mist, effectively eliminating the risk of the crankcase vent pipe closing and collecting oil and dripping, causing the oil mist detector to falsely alarm or even shut down the diesel engine. The implementation of this technology only requires adding a box 1 with a "human"-shaped disc 401 group inside to the existing armored hose outlet flange and the upper pipe section. The later operation and maintenance are simple, and only the separation disc 401 group needs to be checked and cleaned regularly, which can reduce the unit shutdown maintenance.

[0037] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0038] In the description of the present utility model, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0042] In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for preventing a diesel engine oil mist detector from falsely alarming, characterized in that: include: Box body (1); An oil mist outlet pipeline (2) is connected and arranged at the top of the box body (1); An inlet pipeline (3) is connected and arranged at the bottom of the box body (1); The oil mist separation mechanism (4) is detachably mounted inside the box (1), and the top port of the inlet pipeline (3) corresponds to the position of the oil mist separation mechanism (4); The discharge pipe (5) is connected and arranged at the bottom of the box body (1).

2. A device for preventing a diesel engine oil mist detector from falsely alarming according to claim 1, characterized in that: Two L-shaped support bars (6) are symmetrically fixed inside the box body (1) for supporting the oil mist separation mechanism (4).

3. A device for preventing a diesel engine oil mist detector from falsely alarming according to claim 2, characterized in that: The oil mist separation mechanism (4) comprises two herringbone mounting strips (400), a plurality of discs (401) are fixedly mounted between the two herringbone mounting strips (400), the herringbone mounting strips (400) are fixedly mounted in the box body (1) by means of screws, and two L-shaped support strips (6) are in contact with the herringbone mounting strips (400).

4. A device for preventing a diesel engine oil mist detector from falsely alarming according to claim 3, characterized in that: The discs (401) are symmetrically arranged between two herringbone mounting strips (400), and the number of the discs (401) is sixteen.

5. A device for preventing a diesel engine oil mist detector from falsely alarming according to claim 4, characterized in that: The arrangement inclination angle of the discs (401) on one side is thirty degrees, and the arrangement inclination angle of the discs (401) on the other side is one hundred and fifty degrees.

6. The device for preventing a diesel engine oil mist detector from falsely alarming according to claim 1, characterized in that: The front of the box body (1) is detachably equipped with a cover plate (7).

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