KR20090077128A - Trap device for preventing flame of internal combustion engine - Google Patents

Abstract

A trap device for preventing the flame of an internal combustion engine is provided to reduce the amount and the impact of flame emitted outside by maximizing flame heat absorbing space with a first escape duct and a second flame escape duct. A trap device for preventing the flame of an internal combustion engine comprises: first and second flame escape ducts(10,30) absorbing flame through escape holes(10b,30b) formed between straps(10a,30a); a decompression diffusion space(20) reducing the pressure of the flame which becomes weak through the first flame escape duct; and a plurality of flame heat absorbing nets(40) absorbing the flame flowed into the decompression diffusion space. The first and second flame escape ducts are installed at the circumference of an opening of a crankcase in which flame is emitted. The second flame escape duct is installed at the outside of the decompression diffusion space. The flame heat absorbing net is installed inside the decompression diffusion space.

Description

TRAP DEVICE FOR PREVENTING FLAME OF INTERNAL COMBUSTION ENGINE}

The present invention relates to a trap device for preventing flame ejection of an internal combustion engine, and more particularly, in a heat-resistant engine of a large-sized ship, in the event of a misfire, it is possible to absorb and decompress flames emitted to the outside while maintaining the performance of decompression according to the impact of the explosion. The present invention relates to a flameout prevention trap device of an internal combustion engine that can minimize deformation of internal components.

In general, a ship uses an internal combustion engine that directly converts high-temperature, high-pressure gas generated by burning fuel in an engine to work energy, and a general internal combustion engine has a structure from an engine unit having a plurality of cylinder devices. It consists of a system that generates power and converts it into mechanical kinetic energy.

A crank portion, which is a transmission device, is connected to the engine portion, and the crank portion is surrounded by the crankcase, and the inside of the crankcase maintains a relatively high temperature and pressure by the high temperature and high pressure gas of the engine, but inside the crankcase When the pressure rises above the specified pressure (usually 0.03 ~ 0.06kg / ㎠), the internal gas is discharged to the outside by excessive pressure, so that the inside of the crankcase can be always maintained at normal pressure.

When a flame is generated by an error in the crankcase, the flame is widely spilled to the outside, which causes not only various mechanisms around the crankcase, but also fatal damage to the human body.

In order to prevent this, there is a need for a flameout prevention trap device that can block the outflow of flames to the outside during the explosion of the engine unit of the internal combustion engine.

Accordingly, the "apparatus for preventing flame ejection of an internal combustion engine" has been proposed by the applicant in the patent application No. 2005-112691, and the continuous development for the performance improvement is being made.

1 is a longitudinal cross-sectional view of a conventional flame ejection trap device.

As shown in Figure 1, the opening portion of the crankcase is equipped with a flame ejection prevention trap device, it is possible to block the flame when the flame is generated by the error in the crankcase.

Specifically, the conventional flame ejection trap device, the primary flame heat absorption network 10, the decompression diffusion space portion in order from the inner side adjacent to the opening of the crankcase so as to absorb and decompress multiple flames emitted to the outside 20), a conventional flame heat absorbing net portion consisting of a secondary flame heat absorbing net portion 30 and a flame induction duct 60 having a structure in which a plurality of straps 61 having radial irregularities formed on the plate surface are overlapped. In the blowout trap device, a high-strength deformation preventing portion 40 and the deformation preventing space portion 50 is further configured between the flame heat absorbing net portion and the flame extracting duct portion 60.

That is, the flame flowing out to the outside is primarily absorbed by the primary flame heat absorbing net portion 10 and the decompression diffusion space portion 20, and the secondary flame heat absorbing net portion 30 to absorb and disperse the reduced pressure flame secondary (30). It consists of).

The primary flame heat absorbing net portion 10 and the secondary flame heat absorbing net portion 30 has a network structure in which a plurality of metal wires are intersected and overlapped. There is little space to take away the flames, so it has only a resistance effect. Recently, the internal combustion engine of a large-sized ship cannot afford the heat offset efficiency.

In addition, between the flame heat absorbing net portion and the flame extracting duct portion 60, the high strength deformation preventing portion 40 and the deformation preventing space portion 50 is configured, this hollow structure is the ability to absorb and decompress the flame as it is While maintaining the metal mesh to a number of straps effectively prevent the deformation of the strap due to the impact of the pressure, there is a problem that the manufacturing process is complicated, because the spaced apart structure having a hollow on the moving distance of the flame In the case of a large distance or a long distance, the pressure is reduced, but the flame has the property of reviving the flame during the movement, the flame does not decrease, there was a problem that the offset efficiency of the flame falls.

In order to solve the problems described above, the present invention, the flame flowing out of the crankcase is absorbed and dispersed in the primary and secondary flame extraction ducts and primary and secondary flame extraction ducts 1 and 2, decompression diffusion space It is an object of the present invention to provide a flameout prevention trap device for an internal combustion engine that is capable of completely absorbing the flames and flames of an enlarged internal combustion engine by providing at least one flame heat absorption net portion for absorbing and dispersing the flames flowing out to the side. .

Flame spray prevention trap device of the internal combustion engine according to a preferred embodiment of the present invention for achieving the above object is installed on the outer periphery of the opening of the crankcase from which the flame is ejected, a plurality of radially irregularities formed on the plate surface A primary flame leading-out duct portion having a structure in which the straps are overlapped to absorb the flame while passing through the lead-out hole formed between the straps and to discharge the flame in a non-flame state due to the non-combustion caused by oxygen deficiency; A reduced pressure diffusion space portion configured to provide an empty space portion extended outside the primary flame discharge duct portion to reduce pressure of the dispersed and weakened flame passing through the primary flame discharge duct portion; It is installed outside the decompression diffusion space part, and a plurality of straps, such as the primary flame extracting duct part, are overlapped to form a plurality of outlet holes that provide a flame movement path to the inside and the outside to finally absorb the remaining flame. A secondary flame extracting duct portion; comprising a plurality of metal wires intersecting and overlapping with each other, formed in a decompression diffusion space portion, and absorbing and dispersing a flame flowing out of the decompression diffusion space portion; At least one heat absorption net is characterized in that it is provided.

In addition, the flame spray prevention trap device of the internal combustion engine according to the first embodiment of the present invention, it is preferable that the flame heat absorbing net portion is installed on the side close to the primary flame extraction duct inside the decompression diffusion space. .

Further, in the flame ejection prevention trap apparatus of the internal combustion engine according to the second preferred embodiment of the present invention, the flame heat absorbing net portion is preferably installed near the secondary flame extracting duct portion inside the decompression diffusion space portion. .

In addition, in the flameout prevention trap apparatus of the internal combustion engine according to the third embodiment of the present invention, the flame heat absorbing net portion is close to the primary flame extracting duct portion inside the decompression diffusion space portion and the secondary flame outflow It is preferable to be installed in the side close to a duct part.

In addition, the flame spray prevention trap device of the internal combustion engine according to the fourth, fifth and sixth preferred embodiments of the present invention, the second flame heat absorption net portion between the opening of the crankcase and the primary flame extraction duct portion It is preferable to be installed.

In addition, in the trap device for preventing flame discharge of the internal combustion engine according to the seventh preferred embodiment of the present invention, it is preferable that the second flame heat absorbing net part is further installed outside the secondary flame discharge duct part.

On the other hand, the secondary flame extracting duct portion according to the present invention, it is preferably formed the same thickness or thicker than the primary flame extracting duct portion, the width is preferably formed the same or longer.

In addition, it is preferable that the primary flame extracting duct portion and the secondary flame extracting duct portion according to the present invention are shaped and fixed by a plurality of support bolts in contact with the inner and outer sides.

The present invention by the configuration as described above, by maximizing the flame heat absorption space by the primary flame discharge duct portion and the secondary flame discharge duct portion of the heat of the flame discharged to the outside of the opoxy of the enlarged internal combustion engine It is possible to significantly reduce the amount and impact, and also by absorbing and attenuating by the flame heat absorption network installed in the first and second or multiple, there is an effect that can be suppressed to the maximum release of the flame to the outside.

In addition, according to the present invention, in order to offset the gap space which is increased with respect to the contact area of the flame in the secondary flame extracting duct part according to the enlarged internal combustion engine, the secondary flame extracting duct part is equal to or more than the primary flame extracting duct part. To form a thick, the width is the same or longer to form an effect that can finally catch the flame.

In addition, according to the present invention, the first and second flame extracting ducts are installed on the outer circumferential surface of the plurality of support bolts so as to be adjacent and supported with the deformation preventing space interposed therebetween. It has the effect of sufficiently enduring to prevent breakage.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, and like reference numerals refer to like elements throughout. The terminology used in the description is not to be construed as merely limiting or limiting, because it is used in conjunction with the description of certain specific embodiments of the invention. In addition, embodiments of the present invention may include a variety of new features, and are not intended to be exclusively applied to the required characteristics, it is a basic content in practicing the present invention.

2 is a longitudinal cross-sectional view of a flame ejection prevention trap apparatus of an internal combustion engine according to a first embodiment of the present invention.

As shown in Figure 2, the flame ejection prevention trap device of the internal combustion engine according to the first embodiment of the present invention, the primary flame extraction duct 10 from the inner side adjacent to the opening of the crankcase, the pressure diffusion space portion 20 and the secondary flame extracting duct unit 30 are installed in this order, and a flame heat absorbing net unit 40 is further installed inside the decompression diffusion space unit 20 to absorb multiple flames emitted to the outside. It has a structure which can reduce pressure.

First, the primary flame induction duct 10 according to the present invention will be described.

The primary flame extracting duct unit 10 has a structure in which a plurality of straps 10a having radial irregularities on a plate surface are overlapped to form a plurality of outlet holes 10b providing a flame movement path to the inside and the outside. It is a component installed most adjacent to the outer circumference of the opening of the crankcase to be ejected. The leading hole 10b of the primary flame extracting duct part 10 has the unevenness of the strap 10a to form the upper and lower side walls to provide a large surface area and to expand the contact area with cold air therein. The flame passing through the opening of the case is effectively cooled. And, a flame having a high flow rate passes through every long path formed by each of the outlet holes 10b, and a phenomenon in which oxygen is depleted instantly occurs, and the flame can be significantly reduced by oxygen deficiency.

In addition, the primary flame induction duct 10 has a structure in which a plurality of straps 10a and lead holes 10b overlap each other, and the width thereof is generally about 20 mm to 30 mm, so that the flames are formed on the strap 10 a and the lead holes. The resistance to air flow through (10b) is large, so that deformation due to the impact of the explosion is less likely to occur. Therefore, there is an advantage that the high-strength deformation prevention portion as in the prior art is unnecessary.

Next, the decompression diffusion space 20 according to the present invention will be described.

The reduced pressure diffusion space portion 20 is a component that provides an empty space portion that is extended to the outside of the primary flame induction duct 10, the flame passing through the primary flame induction duct 10 is suddenly expanded As the pressure is rapidly reduced, the pressure is rapidly reduced, and the pressure is uniformly absorbed into the reduced pressure diffusion space 20 so as to be introduced into the secondary flame extracting duct unit 30 to be described later. At this time, the flame heat absorption net portion 40 is further provided inside the decompression diffusion space portion 20, the flame heat absorption net portion 40 will be described in detail below.

Next, the secondary flame extraction duct unit 30 according to the present invention will be described.

The secondary flame extracting duct unit 30 is a component that finally absorbs and attenuates a flame, and has a plurality of straps 30a having radial irregularities on a plate surface like the primary flame extracting duct unit 10. The overlapping structure is formed so as to form a plurality of outlet holes 30b providing a flame movement path to the side, and are spaced apart while forming the reduced pressure diffusion space portion 20 outside the flame heat absorbing net portion 40.

The outlet hole 30b of the secondary flame extracting duct portion 30 forms an upper and lower wall of the unevenness of the strap 30a to provide a large surface area and to expand the contact area with cold air therein. The flame passing through the secondary flame extracting duct unit 30 is effectively cooled, and a phenomenon in which oxygen is deficient instantaneously occurs as the flame having a high flow velocity passes through each long path formed by each of the outlet holes 30b. As a result of the oxygen deficiency, the flame is no longer in the form of a flame, but changes to a smoke state and discharged to the outside.

Here, the thickness of the secondary flame extracting duct unit 30 is the same or thicker than the thickness of the primary flame extracting duct unit 10, and the width thereof is also the same or longer. That is, even in the same height space, the cylindrical secondary flame extracting duct portion 30 installed on the outer side of the primary flame extracting duct portion 10 increases in area, and when the area increases, the space also increases. Therefore, in order to offset the gap space increased in relation to the contact area of the flame in the secondary flame extracting duct unit 30 to form the same or thicker, the width is formed to be the same or longer to finally catch the flame will be. For example, if the thickness of the primary flame extracting duct part 10 is 0.5t, the thickness of the secondary flame extracting duct part 30 is preferably about 0.5t to 1.0t, and the primary flame extracting duct part If the width of 10 is 30 mm, it is preferable that the width of the secondary flame extracting duct part 30 is about 35 mm to 40 mm. These thickness values can be adjusted to any number of internal combustion engines and may be used equally within certain ranges.

Meanwhile, the first and second flame induction ducts 10 and 30 have inner and outer sides adjacent to the outer circumferential surfaces of the plurality of inner support bolts 11 and the outer support bolts 12 with the pressure reducing diffusion space 20 therebetween. It is installed so as to be supported, so that it is cylindrically shaped and at a constant distance from each other so that the path of flame discharge is not impeded.

Next, the flame heat absorption net portion 40 according to the present invention will be described.

The flame heat absorbing net part 40 is installed inside the decompression diffusion space part 20 to absorb and disperse the flame flowing out into the decompression diffusion space part 20, and a plurality of metal wires intersect and overlap each other. Is formed. That is, as the flame passes between the metal wires, the air flow strikes a plurality of metal wires, the air flows stagnate and are dispersed in the gaps of the metal wires, consuming energy, thereby reducing the impact, and by contact with the metal wires. The heat is cooled, which weakens the force of the flame. Therefore, by placing the flame heat absorbing net portion 40 in the decompression diffusion space 20, it is possible to enhance the flame absorption and impact resistance. In this case, the metal wire rod constituting the flame heat absorption net portion 40 is made of a wire material or the like, easy to be processed into a wire rod or a net shape and excellent heat absorption rate.

According to the first embodiment of the present invention, the flame first flows into the lead-out hole 10b, which is the flame moving space of the primary flame-out duct part 10, and the lead-out hole 10b. Cool the flame passing through it. And, the flame passing through the primary flame extracting duct portion 10 passes through the plurality of metal wires of the flame heat absorbing net portion 40 installed in the decompression diffusion space portion 20 secondly while the air flows. It hits a plurality of metal wires, stagnates and is dispersed in the gaps of the metal wires, and consumes energy, thereby reducing the pressure. The heat is secondarily cooled by the contact with the metal wires, thereby weakening the force of the flame. In particular, the pressure caused by the explosion in the reduced-pressure diffusion space 20 is evenly formed in the entire space portion, and the pressure is drastically reduced, and finally the primary flame-out duct unit 10 passes through the secondary flame-out duct unit 30. In the same principle as), it is possible to block the heat of the weakened flame, so that even if an explosion occurs inside the crankcase, the flame is effectively prevented from being released to the outside.

Hereinafter, the flame heat absorbing net portion 40 described in the second to sixth embodiments is installed on the side close to the primary flame extracting duct portion 10 inside the decompression diffusion space portion 20. Named the flame heat absorption net portion (40a), and installed on the side close to the secondary flame extracting duct portion 30 inside the decompression diffusion space portion 20 is named as 'outer flame heat absorption net portion (40b)' In addition, what is installed between the opening of the crankcase and the primary flame extracting duct unit 10 will be described as 'second flame heat absorbing net portion 41'.

3 is a longitudinal sectional view of a flame ejection prevention trap apparatus of an internal combustion engine according to a second preferred embodiment of the present invention.

As shown in FIG. 3, the flame ejection prevention trap device of the internal combustion engine according to the second exemplary embodiment of the present invention includes a primary flame extracting duct part 10 and a reduced pressure diffusion space part from an inner side adjacent to an opening of a crankcase. 20 and the secondary flame extracting duct unit 30 are installed in sequence, and the outer flame heat absorbing net unit 40b is provided on the side close to the secondary flame extracting duct unit 30 inside the decompression diffusion space 20. Have the installed configuration.

According to the second embodiment of the present invention, the flame first flows into the lead-out hole 10b, which is the flame moving space of the primary flame-out duct part 10, and the lead-out hole 10b. Cool the flame passing through it.

In addition, the flame passing through the primary flame extracting duct part 10 forms the pressure caused by the explosion in the decompression diffusion space part 20 evenly in the entire space part, thereby rapidly reducing the pressure, and thirdly, the outer flame heat absorbing net part ( The flow of air hits the plurality of metal wires while stagnating and dispersing in the gaps of the metal wires while passing between the plurality of metal wires of 40b), consuming energy and reducing the pressure, so that heat is generated by contact with the metal wires. Cooling weakens the force of the flame.

Finally, while passing through the secondary flame extracting duct unit 30 in the fourth order, the heat and pressure of the greatly weakened flame can be completely blocked from being released to the outside in the same principle as the primary flame extracting duct unit 10. Will be.

4 is a longitudinal sectional view of a flame ejection prevention trap apparatus of an internal combustion engine according to a third preferred embodiment of the present invention.

As shown in FIG. 4, the flame ejection prevention trap apparatus of the internal combustion engine according to the third exemplary embodiment of the present invention includes a primary flame extracting duct part 10 and a reduced pressure diffusion space part from an inner side adjacent to an opening of a crankcase. 20 and the secondary flame extracting duct part 30 are installed in sequence, and the inner flame heat absorbing net part 40a is disposed on the side close to the primary flame extracting duct part 10 inside the decompression diffusion space part 20. In addition, the outer flame heat absorbing duct portion 30 has a configuration in which the outer flame heat absorbing net portion 40b is further installed.

According to the third embodiment of the present invention, first, the flame first flows into the derivation hole 10b, which is the flame moving space of the primary flame evacuation duct unit 10, and the derivation hole 10b. It cools the flame passing through.

In addition, the flame passing through the primary flame extracting duct part 10 is secondarily passed between the plurality of metal wires of the inner flame heat absorbing net part 40a, and the air flow is stagnated by the plurality of metal wires. The energy is dissipated as it is dispersed in the gaps of the pressure, and the pressure is reduced. The heat is cooled by the contact with the metal wire, thereby weakening the force of the flame.

In addition, the pressure due to the explosion is formed in the reduced pressure diffusion space portion 20 evenly in the entire space portion, thereby rapidly reducing the pressure, and fourthly passing through the outer flame heat absorption network portion 40b while the inner flame heat absorption network portion 40a. In the same principle as the more energy is consumed to reduce the pressure, the heat is cooled by the contact with the metal wire to further weaken the force of the flame.

Finally, it is possible to completely block the heat and pressure of the greatly weakened flame in the same principle as the primary flame extracting duct unit 10 while passing through the secondary flame extracting duct unit 30 in fifth order.

5 is a longitudinal sectional view of a flame ejection prevention trap apparatus of an internal combustion engine according to a fourth preferred embodiment of the present invention.

As shown in FIG. 5, the flame ejection prevention trap device of the internal combustion engine according to the fourth exemplary embodiment of the present invention includes a primary flame extracting duct part 10 and a reduced pressure diffusion space part from an inner side adjacent to an opening of a crankcase. (20) and the secondary flame extracting duct part (30) are installed one by one, and the second flame heat absorbing net part (41) is spread between the openings of the crankcase and the primary flame extracting duct part (10). The inner flame heat absorbing net part 40a is provided in the space part 20 in the side close to the primary flame extracting duct part 10. As shown in FIG.

According to the fourth embodiment with such a structure, first, the flow of air hits the plurality of metal wires and passes through the plurality of metal wires of the second flame heat absorbing net part 41 to stagnate. The energy is dissipated while the gap is dispersed, and the pressure is reduced, whereby the heat is primarily cooled by the contact with the metal wire.

Then, the flame passing through the second flame heat absorbing net portion 41 flows into the lead-out hole 10b, which is the flame moving space of the primary flame-out duct part 10, and passes the flame passing through the lead-out hole 10b. Secondary cooling.

And, the flame passing through the primary flame extracting duct part 10 consumes more energy on the same principle as the second flame heat absorbing net part 41 while passing through the inner flame heat absorbing net part 40a. The pressure is further reduced and the heat is cooled by the contact with the metal wire to further weaken the force of the flame.

In particular, the pressure caused by the explosion in the reduced-pressure diffusion space 20 is evenly formed in the entire space portion, and the pressure is drastically reduced, and finally the primary flame-out duct unit 10 passes through the secondary flame-out duct unit 30. The same principle as) will completely block the heat of the weakened flame.

6 is a longitudinal cross-sectional view of a flame ejection prevention trap apparatus of an internal combustion engine according to a fifth embodiment of the present invention.

As shown in FIG. 6, the flame ejection prevention trap device of the internal combustion engine according to the fifth exemplary embodiment of the present invention includes a primary flame saluting duct part 10 and a reduced pressure diffusion space part from an inner side adjacent to an opening of a crankcase. (20) and the secondary flame extracting duct part (30) are installed one by one, and the second flame heat absorbing net part (41) is spread between the openings of the crankcase and the primary flame extracting duct part (10). The outer flame heat absorbing net part 40b is provided in the space part 20 in the side near the secondary flame extracting duct part 30. As shown in FIG.

According to the fifth embodiment of the present invention, first, the flow of air hits the plurality of metal wires and passes through the plurality of metal wires of the second flame heat absorbing net portion 41, thereby stagnating the metal wires. The energy is dissipated while the gap is dispersed, and the pressure is reduced, whereby the heat is primarily cooled by the contact with the metal wire.

Then, the flame passing through the second flame heat absorbing net portion 41 flows into the lead-out hole 10b, which is the flame moving space of the primary flame-out duct part 10, and passes the flame passing through the lead-out hole 10b. Secondary cooling.

In addition, the flame passing through the primary flame derivation duct 10 forms a pressure caused by the explosion in the decompression diffusion space 20 evenly in the entire space, thereby rapidly reducing the pressure, and in the outer flame heat absorption network 40b. In the same principle as the second flame heat absorbing net portion 41, the energy is further consumed, and the pressure is further reduced, and the heat is further cooled by the contact with the metal wire to further weaken the force of the flame.

Finally, it is possible to completely block the heat of the flame weakened significantly in the same principle as the primary flame duct duct 10 while passing through the secondary flame duct duct unit (30).

7 is a longitudinal cross-sectional view of a trap device for preventing flame ejection of an internal combustion engine according to a sixth preferred embodiment of the present invention.

As shown in FIG. 7, the flameout prevention trap device of the internal combustion engine according to the sixth exemplary embodiment of the present invention includes a primary flame discharge duct part 10 and a reduced pressure diffusion space part from an inner side adjacent to an opening of a crankcase. (20) and the secondary flame extracting duct part (30) are installed one by one, and the second flame heat absorbing net part (41) is spread between the openings of the crankcase and the primary flame extracting duct part (10). Inside the space portion 20, the inner flame heat absorbing net portion 40a on the side close to the primary flame extracting duct portion 10, and the outer flame heat absorbing net portion 40b on the side near the secondary flame extracting duct portion 30. ) Has a more installed configuration.

According to the sixth embodiment of the present invention, first, the flow of air hits the plurality of metal wires while passing between the plurality of metal wires of the second flame heat absorbing net part 41, thereby stagnating the metal wires. The energy is dissipated while the gap is dispersed, and the pressure is reduced, whereby the heat is primarily cooled by the contact with the metal wire.

Then, the flame passing through the second flame heat absorbing net portion 41 flows into the lead-out hole 10b, which is the flame moving space of the primary flame-out duct part 10, and passes the flame passing through the lead-out hole 10b. Secondary cooling.

And, the flame passing through the primary flame extracting duct part 10 consumes more energy on the same principle as the second flame heat absorbing net part 41 while passing through the inner flame heat absorbing net part 40a. The pressure is further reduced and the heat is cooled by the contact with the metal wire to further weaken the force of the flame.

In particular, the pressure caused by the explosion in the decompression diffusion space portion 20 is formed evenly throughout the space portion to reduce the pressure rapidly, passing through the outer flame heat absorption network portion 40b and the second flame heat absorption network portion 41 and In the same principle as the inner flame heat absorption net portion 40a, energy is further consumed to minimize the pressure, and heat is further cooled by contact with the metal wire to almost extinguish the power of the flame.

Finally, it is possible to completely block the heat of the flame weakened significantly in the same principle as the primary flame duct duct 10 while passing through the secondary flame duct duct 30.

On the other hand, the flame spray prevention trap device of the internal combustion engine according to the seventh preferred embodiment of the present invention, although not shown in the drawings, the second flame heat absorbing net portion 41 outside the secondary flame extracting duct portion (30) Of course, you can install more.

While the present invention has been described with reference to specific embodiments, it will be understood that various modifications and equivalent embodiments are possible without departing from the spirit of the invention as defined by the claims. The technical protection scope should be defined only in the appended claims, and the detailed description and the accompanying drawings should not be construed as limiting the technical spirit of the present invention but as merely illustrative.

1 is a longitudinal cross-sectional view showing an embodiment of a conventional flame ejection trap device for an internal combustion engine.

Figure 2 is a longitudinal sectional view of the flame ejection prevention trap device of the internal combustion engine according to the first embodiment of the present invention.

Figure 3 is a longitudinal sectional view of the flame ejection prevention trap device of the internal combustion engine according to a second embodiment of the present invention.

Figure 4 is a longitudinal sectional view of the flame ejection prevention trap device of the internal combustion engine according to a third embodiment of the present invention.

5 is a longitudinal cross-sectional view of a flameout prevention trap apparatus of an internal combustion engine according to a fourth embodiment of the present invention.

6 is a longitudinal cross-sectional view of a flameout prevention trap apparatus of an internal combustion engine according to a fifth embodiment of the present invention;

7 is a longitudinal cross-sectional view of a flameout prevention trap apparatus of an internal combustion engine according to a sixth preferred embodiment of the present invention.

* Explanation of symbols on main parts of the drawings *

10: primary flame induction duct 10a: strap

10b: lead hole 11: inner support bolt

12: outer support bolt 20: decompression diffusion space

30: secondary flame induction duct portion 30a: strap

30b: lead hole 40. Flame heat absorption net part

40a. Inner flame heat absorption network 40b. Outer flame heat absorption net

41. Second flame heat absorption net

Claims (10)

It is installed in the outer periphery of the opening of the crankcase in which the flame is ejected, and is formed in a structure in which a plurality of straps (10a) formed radially irregularities on the plate surface to pass through the outlet hole (10b) formed between the strap (10a) A primary flame extracting duct unit 10 for absorbing the flame and discharging the flame in a non-flame state due to non-combustion due to oxygen deficiency; Decompression diffusion space portion 20 to provide an extended empty space portion outside the primary flame extraction duct portion 10, passing through the primary flame extraction duct portion 10 to reduce the pressure of the dispersed and weakened flame Wow; A plurality of outlet holes 30b installed outside the reduced pressure diffusion space 20 and providing a flame movement path to the inside and the outside in a structure in which a plurality of straps 30a, such as the primary flame extracting duct part 10, are overlapped. It is formed to include; A plurality of metal wires are formed to cross and overlap the network structure, is installed in the decompression diffusion space portion 20, the flame heat absorption net portion 40 for absorbing and dispersing the flame flowing out to the decompression diffusion space portion 20 side is Flame ejection prevention trap device of the internal combustion engine, characterized in that provided with one or more. According to claim 1, wherein the flame heat absorption network 40, The apparatus for preventing flame ejection of an internal combustion engine, characterized in that it is installed on the side close to the primary flame extracting duct portion (10) inside the reduced pressure diffusion space (20). According to claim 1, wherein the flame heat absorption network 40, Trap apparatus for preventing flame ejection of an internal combustion engine, characterized in that installed on the side close to the secondary flame extraction duct unit 30 in the decompression diffusion space (20). According to claim 1, wherein the flame heat absorption network 40, The apparatus for preventing flame ejection of an internal combustion engine, characterized in that it is installed on the side close to the primary flame extracting duct portion 10 and the side close to the secondary flame extracting duct portion 30 in the decompression diffusion space portion 20. The method of claim 2, And a second flame heat absorbing net portion (41) is further provided between the opening of the crankcase and the primary flame extracting duct portion (10). The method of claim 3, wherein And a second flame heat absorbing net portion (41) is further provided between the opening of the crankcase and the primary flame extracting duct portion (10). The method of claim 4, wherein And a second flame heat absorbing net portion (41) is further provided between the opening of the crankcase and the primary flame extracting duct portion (10). The method according to any one of claims 2 to 7, The second flame heat extracting duct unit 30, the second flame heat absorption net portion 41 is further installed on the outside of the flame spray prevention trap device of the internal combustion engine. The method according to any one of claims 1 to 7, The secondary flame extracting duct unit 30 is formed to have the same thickness or thicker than the primary flame extracting duct unit 10, and the width thereof is the same or longer than the flame discharge prevention of the internal combustion engine. Trap device. The method according to any one of claims 1 to 7, The primary flame extracting duct portion 10 and the secondary flame extracting duct portion 30, Shaped and fixed by a plurality of support bolts (11, 12) in contact with the inner and outer sides flame trap prevention device of the internal combustion engine.

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