WO2009142376A1 - Trap for preventing the burst of flame for pressure control valve of crankcase and manufacturing method thereof - Google Patents

Trap for preventing the burst of flame for pressure control valve of crankcase and manufacturing method thereof Download PDF

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Publication number
WO2009142376A1
WO2009142376A1 PCT/KR2008/007305 KR2008007305W WO2009142376A1 WO 2009142376 A1 WO2009142376 A1 WO 2009142376A1 KR 2008007305 W KR2008007305 W KR 2008007305W WO 2009142376 A1 WO2009142376 A1 WO 2009142376A1
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WO
WIPO (PCT)
Prior art keywords
trap
flames
crankcase
eruption
preventing
Prior art date
Application number
PCT/KR2008/007305
Other languages
French (fr)
Inventor
Tae Hyun Cho
Original Assignee
Tae Hyun Cho
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tae Hyun Cho filed Critical Tae Hyun Cho
Publication of WO2009142376A1 publication Critical patent/WO2009142376A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/10—Safety means relating to crankcase explosions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/06—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for extinguishing sparks

Definitions

  • the present invention relates to a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase and a manufacturing method thereof, and more particularly, to such a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, in which a ring-shaped trap has grooves formed thereon so as to intersect the eruption paths along which flames erupt radially, each of the grooves being positioned at both ends thereof on an inner peripheral edge and an outer peripheral edge of the trap, respectively, so that the eruption of flames generated from the inside the crankcase can be delayed so as to minimize the outward eruption of the flames, and a manufacturing method thereof.
  • Background Art
  • a crank installed at an engine of ships, vehicles and the like is surrounded by a crankcase.
  • the inside of the crankcase is in a high-temperature and high-pressure state due to a gas generated by combustion of a fuel.
  • the crankcase includes a crankcase explosion relief valve installed at an aperture formed at one side thereof so that when the internal pressure of the crankcase increases up to a prescribed pressure (typically, 0.03 to 0.05 kg/cm 2 ) or more, an internal gas of the crankcase flows out by an excessive pressure, thereby preventing a damage of the crankcase.
  • a prescribed pressure typically 0.03 to 0.05 kg/cm 2
  • a trap device for preventing the eruption of flames is often attached to a crankcase explosion relief valve mounted at an aperture of the crankcase.
  • Such a trap device is formed in the shape of a hollow cylindrical body in which a plurality of traps is stacked on one another.
  • each of the traps constituting the trap device for preventing the eruption of flames is generally formed in a ring shape which has a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof.
  • the flame-inducing face has a plurality of grooves formed thereon so that flames generated from the inside of the crankcase for an internal combustion engine are dispersedly induced to the grooves to prevent the outward eruption of the flames.
  • valve device for automatically controlling the internal pressure of a crankcase for internal combustion engines attached with a trap for preventing the eruption of flames which is disclosed in the above Korean Utility Model Registration No. 20-0155647, after a seat fitted with an O-ring is securely fixed to an aperture by means of a stud bolt having a pipe inserted thereto for maintaining an interval, a nut is fastened to the bolt to fix a cover, and a movable disk abuts against the O-ring while being elastically supported.
  • This valve device is characterized in that the spring employs a conical spring whose diameter is gradually decreased as it goes toward one side thereof, i.e., from the seat side toward the nut side such that one end having the smallest diameter of the spring is brought into close contact with the cover and the other end having the largest diameter of the spring is brought into close contact with the movable disk so as to confer elasticity to the movable disk, and in that a trap is fixedly mounted between an outer seat fixed with several stud bolts and the cover, the trap being formed by winding a steel plate having folded projections equidistantly pro- trudingly formed thereof and a ">"-shaped cross-section in a coil spring shape, so that when a fire or an explosion occurs inside the crankcase, flames flowing out of the aperture can be prevented from being widely dispersedly diffused to the outside of the crankcase.
  • a conical spring whose diameter is gradually decreased as it goes toward one side thereof, i.e., from the seat side toward the nut side such
  • the trap used in the above valve device is constructed to have a ">"-shaped cross- section and folded projections of a "V" shape to dispersedly induce the flames.
  • a trap has a drawback in that since the folded projections take a "V" shape whose width is gradually increased toward the outside, they are positioned on paths along which the flames erupt, which results in a limitation in preventing the outward eruption of the flames through the disperse induction of the flames.
  • the method of manufacturing a trap for preventing the eruption of flames for internal combustion engines includes: a first step of horizontally forming corrugations on an outer edge of a single band-shaped strap along the longitudinal direction of the strap; a second step of folding the strap about a geometrical lengthwise central line of the strap formed with the corrugations; and a third step of forming a plurality of flame-introducing nozzles at the central line portion of the folded strap so as to allow the flame-introducing nozzles to fluidically communicate with a plurality of flame-discharging ducts formed between the corrugations, and then stacking a plurality of folded straps on one another to form a cylindrical multi-layered structure.
  • the trap device for preventing the eruption of flames for internal combustion engines which is disclosed in the above Korean Patent Registration No. 10-0661925, includes: a flame heat- absorbing mesh section installed at an outer periphery of an aperture of a crankcase and formed in a mesh structure in which a plurality of metal wires intersects one another and is overlapped with one another so as to absorb and disperse flames flowing out to the outside of the crankcase; a high- strength, deformation-preventing section formed in the same mesh structure as that of the flame heat-absorbing mesh section and installed adjacent to an outer side of the flame heat-absorbing mesh section, the deformation-preventing section being made of a material higher in durability than the flame heat-absorbing mesh section so as to externally inhibit an outward bending deformation of the flame heat-absorbing mesh section; a deformation-preventing space section for providing an empty space allowing the high-strength, deformation-preventing section to be distorted and deformed at an outer side of the high-strength, deformation-preventing section within
  • the trap to which the method and apparatus for manufacturing a trap for preventing the eruption of flames for internal combustion engines is applied, and the trap used in the trap device for preventing the eruption of flames for internal combustion engines encounter a problem in that the grooves for dispersedly inducing flames are formed merely in a radial linear shape in such a manner as to be positioned on paths along which the flames erupt, so that there is still a limitation in preventing the outward eruption of the flames through the disperse induction of the flames. Disclosure of Invention
  • the present invention has been made in an effort to solve the above problem occurring in the prior art, and it is an object of the present invention to provide a novel type of trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, in which a ring-shaped trap has grooves formed thereon so as to intersect the eruption paths along which flames erupt radially, each of the grooves being positioned at both ends thereof on an inner peripheral edge and an outer peripheral edge of the trap, respectively, so that the eruption of flames generated from the inside the crankcase can be delayed so as to minimize the outward eruption of the flames.
  • Another object of the present invention is to provide a method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, which can minimize waste of a material for molding the trap.
  • a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines the trap being installed at an aperture of the crankcase, the improvement wherein the trap is formed in a ring shape having a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof, the fame-inducing face having a plurality of grooves formed thereon, and wherein each of the plurality of grooves extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
  • the bent shape of the groove is any one selected from the group consisting of a " > " shape, an "S" shape and a "C” shape.
  • the flame-inducing face has an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves is bent so as to allow the flames to be dispersed thereto.
  • the flame-inducing face has a plurality of coupling holes formed therein in such a manner as to be spaced apart from one another so that a plurality of traps staked on one another is integrally coupled to one another by means of fastening bolts passing through the plurality of coupling holes.
  • a method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines the trap constituting a trap device for preventing the eruption of flames installed at an aperture of the crankcase and being formed in a ring shape
  • the method including the steps of: arranging the contour lines of a plurality of divided segments of the same size on a thin plate having a predetermined size in such a manner that the plurality of divided segments can be drawn on the thin plate; incising the thin plate along the contour lines of the segments drawn on the thin plate to mold the plurality of segments, and then forming a plurality of grooves on each of the molded segments; and allowing the plurality of molded segments formed with the grooves to be positioned adjacent to one another and to be engaged with one another to thereby manufacture a single trap.
  • the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention has an advantageous effect in that the eruption of flames generated from the inside the crankcase is delayed so as to minimize the outward eruption of the flames.
  • the method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention has an advantageous effect in that waste of a material for molding the trap is minimized.
  • FIG. 1 is a schematic view illustrating a crankcase for internal combustion engines to which a trap for preventing the eruption of flames according to the present invention is applied;
  • FIG. 2 is a view illustrating a crankcase explosion relief valve of a crankcase for internal combustion engines, which is attached with a trap for preventing the eruption of flames;
  • FIG. 3(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes grooves formed thereon in a " > " shape;
  • FIG. 3(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the " > "-shaped grooves;
  • FIG. 4 is a detailed view of FIG. 3(b);
  • FIG. 5 (a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "S"-shaped grooves formed thereon;
  • FIG. 5(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "S"-shaped grooves;
  • FIG. 6(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "C"-shaped grooves formed thereon;
  • FIG. 6(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "C"-shaped grooves;
  • FIG. 7 (a) and 7(b) are views illustrating a state in which a plurality of traps for preventing the eruption of flames is stacked on one another and is integrally coupled to one another by means of fastening bolts, each of traps including " > "-shaped grooves formed thereon; and
  • FIG. 8 is a view illustrating a process of manufacturing a trap for preventing the eruption of flames, which includes " > "-shaped grooves formed thereon.
  • crankcase 2 crankcase explosion relief valve
  • [40] 100 trap for preventing the eruption of flames
  • FIG. 1 is a schematic view illustrating a crankcase for internal combustion engines to which a trap for preventing the eruption of flames according to the present invention is applied
  • FIG. 2 is a view illustrating a crankcase explosion relief valve of a crankcase for internal combustion engines, which is attached with a trap for preventing the eruption of flames
  • FIG. 3(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes grooves formed thereon in a " > " shape
  • FIG. 3(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the " > "-shaped grooves
  • FIG. 4 is a detailed view of FIG. 3(b);
  • FIG. 5 (a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "S"-shaped grooves formed thereon
  • FIG. 5(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "S"-shaped grooves
  • FIG. 6(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "C"-shaped grooves formed thereon
  • FIG. 6(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "C"-shaped grooves
  • FIG. 7(a) and 7(b) are views illustrating a state in which a plurality of traps for preventing the eruption of flames is stacked on one another and is integrally coupled to one another by means of fastening bolts, each of traps including " > "-shaped grooves formed thereon
  • FIG. 8 is a view illustrating a process of manufacturing a trap for preventing the eruption of flames, which includes " > "-shaped grooves formed thereon.
  • a trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase is an element constituting a trap device 3 attached to a crankcase explosion relief valve 2 installed at an aperture of a crankcase 1 for internal combustion engines.
  • the trap 100 is formed in a ring shape having a flame-inducing face 30 of a predetermined width formed between an inner peripheral edge 10 and an outer peripheral edge 20 of the trap, the fame-inducing face having a plurality of grooves 40 formed thereon, so that flames generated from the inside of the crankcase 1 for internal combustion engines are dispersedly induced to the grooves to prevent the outward eruption of the flames.
  • the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase features that each of a plurality of grooves 40 extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a " > ", "S” or “C” shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
  • one end of the groove 40 is connected to the inner peripheral edge 10 of the trap so that the flames generated from the inside of the crankcase 1 are induced thereto, and then are moved to the other end of the groove 40 connected to the outer peripheral edge 10 of the trap while being dispersed along the grooves 40.
  • such a groove 40 is formed in a " > ", "S” or “C” shape in which both ends of the groove are positioned on the inner peripheral edge 10 and the outer peripheral edge 20 of the trap, respectively. Since the flames generated from the inside of the crankcase due to an erroneous explosion generally erupt radially, the grooves 40 formed on the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention intersect the typical flame eruption paths.
  • the flames induced to the grooves 40 travel while encountering a resistance of the grooves 40 so that the eruption of the flames is effectively delayed and the time during which the flames dispersedly induced to the grooves 40 are cooled by the flame-inducing face 30 having a relatively low temperature is increased by the time during which the eruption of the flames is delayed. Further, the time during which the flames are brought into close contact with air is decreased so that the flames are extinguished effectively.
  • FIGs. 3 (a) and 3(b) and FIG. 4 show the trap 100 for preventing the eruption of flames according to the present invention, which has a plurality of " > "-shaped grooves 40 formed thereon.
  • the central portion where the groove 40 is bent is preferably rounded off.
  • FIGs. 5(a) and 5(b) show the trap 100 for preventing the eruption of flames according to the present invention, which has a plurality of "S"-shaped grooves 40 formed thereon.
  • FIGs. 6(a) and 6(b) show the trap 100 for preventing the eruption of flames according to the present invention, which has a plurality of semicircular or "C"-shaped grooves 40 formed thereon.
  • the flame-inducing face 30 of the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase shown in FIGs. 3(b), 5(b) and 6(b) has an auxiliary annular groove 50 extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves 40 is bent so as to allow the flames to be dispersed thereto.
  • Such an auxiliary groove 50 allows the flames inductively traveling along first halves of the grooves 40 to be dispersed in both directions of the grooves 40 so as to further delay the eruption of the flames.
  • the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention includes the plurality of " > "-shaped grooves 40 and the auxiliary annular groove 50m, so that the flames are effectively dispersed, and the eruption of the flames are effectively delayed, thereby preventing the outward eruption of the flames from the crankcase 1.
  • a plurality of traps 100 each having the flame-inducing face 30 having a plurality of coupling holes 60 formed thereon in such a manner as to be spaced apart from one another is stacked on one another and is integrally coupled to one another by means of fastening bolts 70 passing through the coupling holes 60 and fastening nuts 80.
  • fastening bolts 70 passing through the coupling holes 60 and fastening nuts 80.
  • a method of manufacturing the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention has been devised to minimize waste of a thin plate 200 for molding the trap 100.
  • the trap 100 is formed such that a plurality of divided segments 90 of the same size is molded and then is engaged with one another.
  • each different segment 90 is a quarter segment of the trap 100, which is formed in a shape divided into four parts. Formed at both ends of each segment 90, are a male engagement portion 92a and a female engagement portion 92b which have a mating relationship with each other, so that the male engagement portion 92a and the female engagement portion 92b of two adjacent segments 90 are engaged with each other in a press-fit manner.
  • the four segments 90 may be engaged with each other by engaging both opposed ends of adjacent segments with each other by a spot welding method.
  • Each segment 90 is formed by incising a thin plate 200 of a predetermined size. To this end, as shown in FIG. 8, a contour line of the segment 90 is drawn on the thin plate 200 of a predetermined size.
  • the contour lines of the segments 90 are arranged such that a plurality of segments 90 is more densely positioned, so that the segments 90 can be drawn as many as possible on the thin plate 200, thereby minimizing waste of the thin plate 200.
  • the plate 200 is incised along the contour lines of segments 90 drawn on the plate 200 to mold a plurality of segments 90.
  • a plurality of grooves 40 is formed on the molded segments 90.
  • the male engagement portions 92a and the female engagement portions 92b of the opposed adjacent segments 90 are engaged with one another to thereby manufacture a single trap 100.
  • a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines the trap being installed at an aperture of the crankcase, the improvement wherein the trap is formed in a ring shape having a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof, the fame-inducing face having a plurality of grooves formed thereon, and wherein each of the plurality of grooves extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
  • the bent shape of the groove is any one selected from the group consisting of a " > " shape, an "S” shape and a "C” shape.
  • the flame-inducing face has an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves is bent so as to allow the flames to be dispersed thereto.
  • the flame-inducing face has a plurality of coupling holes formed therein in such a manner as to be spaced apart from one another so that a plurality of traps staked on one another is integrally coupled to one another by means of fastening bolts passing through the plurality of coupling holes.
  • a method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines the trap constituting a trap device for preventing the eruption of flames installed at an aperture of the crankcase and being formed in a ring shape, the method including the steps of: arranging the contour lines of a plurality of divided segments of the same size on a thin plate having a predetermined size in such a manner that the plurality of divided segments can be drawn on the thin plate; incising the thin plate along the contour lines of the segments drawn on the thin plate to mold the plurality of segments, and then forming a plurality of grooves on each of the molded segments; and allowing the plurality of molded segments formed with the grooves to be positioned adjacent to one another and to be engaged with one another to thereby manufacture a single trap.
  • the present invention relates to a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase and a manufacturing method thereof, and more particularly, to such a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, in which a ring-shaped trap has grooves formed thereon so as to intersect the eruption paths along which flames erupt radially, each of the grooves being positioned at both ends thereof on an inner peripheral edge and an outer peripheral edge of the trap, respectively, so that the eruption of flames generated from the inside the crankcase can be delayed so as to minimize the outward eruption of the flames, and a manufacturing method thereof.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

The present invention provides a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, wherein the trap is formed in a ring shape having a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof, the fame-inducing face having a plurality of grooves formed thereon so that flames generated from the inside of the crankcase are inductively dispersed to the grooves, thereby preventing the outward eruption of the flames from the crankcase, and a manufacturing method thereof. The trap and the manufacturing method thereof according to the present invention allows each groove to extend in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and allows each groove to be formed in a shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed, thereby preventing the outward eruption of the flames.

Description

Description
TRAP FOR PREVENTING THE BURST OF FLAME FOR PRESSURE CONTROL VALVE OF CRANKCASE AND MANUFACTURING METHOD THEREOF
Technical Field
[1] The present invention relates to a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase and a manufacturing method thereof, and more particularly, to such a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, in which a ring-shaped trap has grooves formed thereon so as to intersect the eruption paths along which flames erupt radially, each of the grooves being positioned at both ends thereof on an inner peripheral edge and an outer peripheral edge of the trap, respectively, so that the eruption of flames generated from the inside the crankcase can be delayed so as to minimize the outward eruption of the flames, and a manufacturing method thereof. Background Art
[2] A crank installed at an engine of ships, vehicles and the like is surrounded by a crankcase. The inside of the crankcase is in a high-temperature and high-pressure state due to a gas generated by combustion of a fuel.
[3] The crankcase includes a crankcase explosion relief valve installed at an aperture formed at one side thereof so that when the internal pressure of the crankcase increases up to a prescribed pressure (typically, 0.03 to 0.05 kg/cm2) or more, an internal gas of the crankcase flows out by an excessive pressure, thereby preventing a damage of the crankcase.
[4] In the meantime, when an explosion occurs inside the crankcase due to an erroneous explosion such as ignition caused by the overheating of oil gas or the like, flames erupt to the outside of the crankcase. Such erupting flames cause breakage of components around the crankcase or facility or the casualty of the driver and/or any passenger in the vehicle.
[5] To prevent this, a trap device for preventing the eruption of flames is often attached to a crankcase explosion relief valve mounted at an aperture of the crankcase. Such a trap device is formed in the shape of a hollow cylindrical body in which a plurality of traps is stacked on one another.
[6] Here, each of the traps constituting the trap device for preventing the eruption of flames is generally formed in a ring shape which has a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof. The flame-inducing face has a plurality of grooves formed thereon so that flames generated from the inside of the crankcase for an internal combustion engine are dispersedly induced to the grooves to prevent the outward eruption of the flames. In this regard, as examples of the traps constituting the trap device for preventing the eruption of flames, there have been proposed Korean Utility Model Registration No. 20-0155647 entitled "VALVE DEVICE FOR AUTOMATICALLY CONTROLLING THE INTERNAL PRESSURE OF CRANKCASE FOR INTERNAL COMBUSTION ENGINES ATTACHED WITH TRAP FOR PREVENTING THE ERUPTION OF FLAMES", Korean Patent Registration No. 10-0325021 entitled "METHOD OF AND DEVICE FOR MANUFACTURING TRAP FOR PREVENTING THE ERUPTION OF FLAMES FOR INTERNAL COMBUSTION ENGINES", Korean Patent Registration No. 10-0661925 entitled "TRAP DEVICE FOR PREVENTING THE ERUPTION OF FLAMES FOR INTERNAL COMBUSTION ENGINES", etc.
[7] In the valve device for automatically controlling the internal pressure of a crankcase for internal combustion engines attached with a trap for preventing the eruption of flames, which is disclosed in the above Korean Utility Model Registration No. 20-0155647, after a seat fitted with an O-ring is securely fixed to an aperture by means of a stud bolt having a pipe inserted thereto for maintaining an interval, a nut is fastened to the bolt to fix a cover, and a movable disk abuts against the O-ring while being elastically supported. This valve device is characterized in that the spring employs a conical spring whose diameter is gradually decreased as it goes toward one side thereof, i.e., from the seat side toward the nut side such that one end having the smallest diameter of the spring is brought into close contact with the cover and the other end having the largest diameter of the spring is brought into close contact with the movable disk so as to confer elasticity to the movable disk, and in that a trap is fixedly mounted between an outer seat fixed with several stud bolts and the cover, the trap being formed by winding a steel plate having folded projections equidistantly pro- trudingly formed thereof and a ">"-shaped cross-section in a coil spring shape, so that when a fire or an explosion occurs inside the crankcase, flames flowing out of the aperture can be prevented from being widely dispersedly diffused to the outside of the crankcase.
[8] The trap used in the above valve device is constructed to have a ">"-shaped cross- section and folded projections of a "V" shape to dispersedly induce the flames. However, such a trap has a drawback in that since the folded projections take a "V" shape whose width is gradually increased toward the outside, they are positioned on paths along which the flames erupt, which results in a limitation in preventing the outward eruption of the flames through the disperse induction of the flames.
[9] In the method of and apparatus for manufacturing a trap for preventing the eruption of flames for internal combustion engines, which is disclosed in the above Korean Patent Registration No. 10-0325021, the method of manufacturing a trap for preventing the eruption of flames for internal combustion engines, includes: a first step of horizontally forming corrugations on an outer edge of a single band-shaped strap along the longitudinal direction of the strap; a second step of folding the strap about a geometrical lengthwise central line of the strap formed with the corrugations; and a third step of forming a plurality of flame-introducing nozzles at the central line portion of the folded strap so as to allow the flame-introducing nozzles to fluidically communicate with a plurality of flame-discharging ducts formed between the corrugations, and then stacking a plurality of folded straps on one another to form a cylindrical multi-layered structure.
[10] In addition, the trap device for preventing the eruption of flames for internal combustion engines, which is disclosed in the above Korean Patent Registration No. 10-0661925, includes: a flame heat- absorbing mesh section installed at an outer periphery of an aperture of a crankcase and formed in a mesh structure in which a plurality of metal wires intersects one another and is overlapped with one another so as to absorb and disperse flames flowing out to the outside of the crankcase; a high- strength, deformation-preventing section formed in the same mesh structure as that of the flame heat-absorbing mesh section and installed adjacent to an outer side of the flame heat-absorbing mesh section, the deformation-preventing section being made of a material higher in durability than the flame heat-absorbing mesh section so as to externally inhibit an outward bending deformation of the flame heat-absorbing mesh section; a deformation-preventing space section for providing an empty space allowing the high-strength, deformation-preventing section to be distorted and deformed at an outer side of the high-strength, deformation-preventing section within a predetermined width; and a flame-inducing duct section installed at an outer side of the deformation- preventing space section and formed in a multi-layered structure in which a plurality of straps is stacked on one another, each strap having corrugations radially formed on a surface thereof, so that the remaining flames having passed through the deformation- preventing space section are finally absorbed while passing through a plurality of flame-inducing holes formed between the plurality of straps and are discharged in a free-of-flame state under an incomplete combustion condition due to the lack of oxygen.
[11] However, the trap to which the method and apparatus for manufacturing a trap for preventing the eruption of flames for internal combustion engines is applied, and the trap used in the trap device for preventing the eruption of flames for internal combustion engines encounter a problem in that the grooves for dispersedly inducing flames are formed merely in a radial linear shape in such a manner as to be positioned on paths along which the flames erupt, so that there is still a limitation in preventing the outward eruption of the flames through the disperse induction of the flames. Disclosure of Invention
Technical Problem
[12] Accordingly, the present invention has been made in an effort to solve the above problem occurring in the prior art, and it is an object of the present invention to provide a novel type of trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, in which a ring-shaped trap has grooves formed thereon so as to intersect the eruption paths along which flames erupt radially, each of the grooves being positioned at both ends thereof on an inner peripheral edge and an outer peripheral edge of the trap, respectively, so that the eruption of flames generated from the inside the crankcase can be delayed so as to minimize the outward eruption of the flames.
[13] Another object of the present invention is to provide a method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, which can minimize waste of a material for molding the trap. Technical Solution
[14] To accomplish the above objects, according to one aspect of the present invention, there is provided a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines, the trap being installed at an aperture of the crankcase, the improvement wherein the trap is formed in a ring shape having a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof, the fame-inducing face having a plurality of grooves formed thereon, and wherein each of the plurality of grooves extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
[15] In the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the bent shape of the groove is any one selected from the group consisting of a " > " shape, an "S" shape and a "C" shape.
[16] In the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the flame-inducing face has an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves is bent so as to allow the flames to be dispersed thereto. [17] In the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the flame-inducing face has a plurality of coupling holes formed therein in such a manner as to be spaced apart from one another so that a plurality of traps staked on one another is integrally coupled to one another by means of fastening bolts passing through the plurality of coupling holes.
[18] To accomplish the above objects, according to another aspect of the present invention, there is provided a method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines, the trap constituting a trap device for preventing the eruption of flames installed at an aperture of the crankcase and being formed in a ring shape, the method including the steps of: arranging the contour lines of a plurality of divided segments of the same size on a thin plate having a predetermined size in such a manner that the plurality of divided segments can be drawn on the thin plate; incising the thin plate along the contour lines of the segments drawn on the thin plate to mold the plurality of segments, and then forming a plurality of grooves on each of the molded segments; and allowing the plurality of molded segments formed with the grooves to be positioned adjacent to one another and to be engaged with one another to thereby manufacture a single trap.
Advantageous Effects
[19] As described above, the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention has an advantageous effect in that the eruption of flames generated from the inside the crankcase is delayed so as to minimize the outward eruption of the flames.
[20] Moreover, the method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention has an advantageous effect in that waste of a material for molding the trap is minimized. Brief Description of Drawings
[21] FIG. 1 is a schematic view illustrating a crankcase for internal combustion engines to which a trap for preventing the eruption of flames according to the present invention is applied;
[22] FIG. 2 is a view illustrating a crankcase explosion relief valve of a crankcase for internal combustion engines, which is attached with a trap for preventing the eruption of flames;
[23] FIG. 3(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes grooves formed thereon in a " > " shape; [24] FIG. 3(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the " > "-shaped grooves;
[25] FIG. 4 is a detailed view of FIG. 3(b);
[26] FIG. 5 (a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "S"-shaped grooves formed thereon;
[27] FIG. 5(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "S"-shaped grooves;
[28] FIG. 6(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "C"-shaped grooves formed thereon;
[29] FIG. 6(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "C"-shaped grooves;
[30] FIG. 7 (a) and 7(b) are views illustrating a state in which a plurality of traps for preventing the eruption of flames is stacked on one another and is integrally coupled to one another by means of fastening bolts, each of traps including " > "-shaped grooves formed thereon; and
[31] FIG. 8 is a view illustrating a process of manufacturing a trap for preventing the eruption of flames, which includes " > "-shaped grooves formed thereon.
[32] <Explanation on reference numerals of main elements in drawings >
[33] 1: crankcase 2: crankcase explosion relief valve
[34] 3: trap device 10: inner peripheral edge
[35] 20: outer peripheral edge 30: flame-inducing face
[36] 40, 40', 40": grooves 50: auxiliary groove
[37] 60: coupling holes 70: fastening bolts
[38] 80: fastening nuts 90: divided segment
[39] 92a, 92b: engagement ends
[40] 100: trap for preventing the eruption of flames
[41] 200: thin plate
Best Mode for Carrying out the Invention
[42] Now, a preferred embodiment of the present invention will be described in detail hereinafter with reference to FIGs. 1 to 8.
[43] Meanwhile, in the drawing and the detailed description, illustration and explanation on the construction and operation which one of ordinary skill in the art can easily understand from a trap for preventing the eruption of flames for a crankcase explosion relief valve of a general crankcase and a manufacturing method thereof will be made briefly or will be omitted for brevity. In particular, in the drawings and the detailed description, illustration and explanation on the detailed technical construction and operation of elements, which have no direct connection with the technical features of the present invention, will be omitted, and only the technical constructions directly related with the present invention will be briefly illustrated and explained.
[44] FIG. 1 is a schematic view illustrating a crankcase for internal combustion engines to which a trap for preventing the eruption of flames according to the present invention is applied, FIG. 2 is a view illustrating a crankcase explosion relief valve of a crankcase for internal combustion engines, which is attached with a trap for preventing the eruption of flames, FIG. 3(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes grooves formed thereon in a " > " shape, FIG. 3(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the " > "-shaped grooves, FIG. 4 is a detailed view of FIG. 3(b); FIG. 5 (a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "S"-shaped grooves formed thereon, FIG. 5(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "S"-shaped grooves, FIG. 6(a) is a top plan view illustrating a trap for preventing the eruption of flames, which includes "C"-shaped grooves formed thereon, FIG. 6(b) is a top plan view illustrating a trap for preventing the eruption of flames, which further includes an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the "C"-shaped grooves, FIG. 7(a) and 7(b) are views illustrating a state in which a plurality of traps for preventing the eruption of flames is stacked on one another and is integrally coupled to one another by means of fastening bolts, each of traps including " > "-shaped grooves formed thereon, and FIG. 8 is a view illustrating a process of manufacturing a trap for preventing the eruption of flames, which includes " > "-shaped grooves formed thereon.
[45] As shown in FIGs. 1 and 2, a trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention is an element constituting a trap device 3 attached to a crankcase explosion relief valve 2 installed at an aperture of a crankcase 1 for internal combustion engines. The trap 100 is formed in a ring shape having a flame-inducing face 30 of a predetermined width formed between an inner peripheral edge 10 and an outer peripheral edge 20 of the trap, the fame-inducing face having a plurality of grooves 40 formed thereon, so that flames generated from the inside of the crankcase 1 for internal combustion engines are dispersedly induced to the grooves to prevent the outward eruption of the flames. [46] Here, as shown in FIGs. 3 to 6, the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention features that each of a plurality of grooves 40 extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a " > ", "S" or "C" shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
[47] That is, one end of the groove 40 is connected to the inner peripheral edge 10 of the trap so that the flames generated from the inside of the crankcase 1 are induced thereto, and then are moved to the other end of the groove 40 connected to the outer peripheral edge 10 of the trap while being dispersed along the grooves 40.
[48] Here, such a groove 40 is formed in a " > ", "S" or "C" shape in which both ends of the groove are positioned on the inner peripheral edge 10 and the outer peripheral edge 20 of the trap, respectively. Since the flames generated from the inside of the crankcase due to an erroneous explosion generally erupt radially, the grooves 40 formed on the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention intersect the typical flame eruption paths. Thus, in the trap 100 for preventing the eruption of flames according to the present invention, the flames induced to the grooves 40 travel while encountering a resistance of the grooves 40 so that the eruption of the flames is effectively delayed and the time during which the flames dispersedly induced to the grooves 40 are cooled by the flame-inducing face 30 having a relatively low temperature is increased by the time during which the eruption of the flames is delayed. Further, the time during which the flames are brought into close contact with air is decreased so that the flames are extinguished effectively.
[49] FIGs. 3 (a) and 3(b) and FIG. 4 show the trap 100 for preventing the eruption of flames according to the present invention, which has a plurality of " > "-shaped grooves 40 formed thereon. The central portion where the groove 40 is bent is preferably rounded off.
[50] In addition, FIGs. 5(a) and 5(b) show the trap 100 for preventing the eruption of flames according to the present invention, which has a plurality of "S"-shaped grooves 40 formed thereon. FIGs. 6(a) and 6(b) show the trap 100 for preventing the eruption of flames according to the present invention, which has a plurality of semicircular or "C"-shaped grooves 40 formed thereon.
[51] Here, the flame-inducing face 30 of the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase shown in FIGs. 3(b), 5(b) and 6(b) has an auxiliary annular groove 50 extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves 40 is bent so as to allow the flames to be dispersed thereto. Such an auxiliary groove 50 allows the flames inductively traveling along first halves of the grooves 40 to be dispersed in both directions of the grooves 40 so as to further delay the eruption of the flames.
[52] The trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention includes the plurality of " > "-shaped grooves 40 and the auxiliary annular groove 50m, so that the flames are effectively dispersed, and the eruption of the flames are effectively delayed, thereby preventing the outward eruption of the flames from the crankcase 1.
[53] In the meantime, in the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, as shown in FIG. 7 (a) and 7(b), a plurality of traps 100 each having the flame-inducing face 30 having a plurality of coupling holes 60 formed thereon in such a manner as to be spaced apart from one another is stacked on one another and is integrally coupled to one another by means of fastening bolts 70 passing through the coupling holes 60 and fastening nuts 80. As a result, it is possible to simply and easily attach the trap device 3 composed of the plurality of traps 100 to the crankcase explosion relief valve 2 installed at the aperture of the crankcase 1.
[54] A method of manufacturing the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention has been devised to minimize waste of a thin plate 200 for molding the trap 100. The trap 100 is formed such that a plurality of divided segments 90 of the same size is molded and then is engaged with one another.
[55] In this case, each different segment 90 is a quarter segment of the trap 100, which is formed in a shape divided into four parts. Formed at both ends of each segment 90, are a male engagement portion 92a and a female engagement portion 92b which have a mating relationship with each other, so that the male engagement portion 92a and the female engagement portion 92b of two adjacent segments 90 are engaged with each other in a press-fit manner. Alternatively, the four segments 90 may be engaged with each other by engaging both opposed ends of adjacent segments with each other by a spot welding method.
[56] Each segment 90 is formed by incising a thin plate 200 of a predetermined size. To this end, as shown in FIG. 8, a contour line of the segment 90 is drawn on the thin plate 200 of a predetermined size. In this case, in the method of manufacturing the trap 100 for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the contour lines of the segments 90 are arranged such that a plurality of segments 90 is more densely positioned, so that the segments 90 can be drawn as many as possible on the thin plate 200, thereby minimizing waste of the thin plate 200.
[57] Next, as shown in FIG. 8(b), the plate 200 is incised along the contour lines of segments 90 drawn on the plate 200 to mold a plurality of segments 90. Thereafter, as shown in FIG. 8(c), a plurality of grooves 40 is formed on the molded segments 90. Then, as shown in FIG. 8(c), after the plurality of molded segments 90 formed with the grooves 40 is positioned adjacent to one another, the male engagement portions 92a and the female engagement portions 92b of the opposed adjacent segments 90 are engaged with one another to thereby manufacture a single trap 100.
[58] Although the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase and the manufacturing method thereof according to the present invention have been described in connection with the exemplary embodiments illustrated in the drawings, it will be appreciated that they are merely an illustrative embodiments and various equivalent modifications and variations of the embodiments can be made by a person having an ordinary skill in the art without departing from the spirit and scope of the present invention. Mode for the Invention
[59] To accomplish the above objects, according to one aspect of the present invention, there is provided a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines, the trap being installed at an aperture of the crankcase, the improvement wherein the trap is formed in a ring shape having a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof, the fame-inducing face having a plurality of grooves formed thereon, and wherein each of the plurality of grooves extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
[60] In the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the bent shape of the groove is any one selected from the group consisting of a " > " shape, an "S" shape and a "C" shape.
[61] In the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the flame-inducing face has an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves is bent so as to allow the flames to be dispersed thereto.
[62] In the trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase according to the present invention, the flame-inducing face has a plurality of coupling holes formed therein in such a manner as to be spaced apart from one another so that a plurality of traps staked on one another is integrally coupled to one another by means of fastening bolts passing through the plurality of coupling holes.
[63] To accomplish the above objects, according to another aspect of the present invention, there is provided a method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines, the trap constituting a trap device for preventing the eruption of flames installed at an aperture of the crankcase and being formed in a ring shape, the method including the steps of: arranging the contour lines of a plurality of divided segments of the same size on a thin plate having a predetermined size in such a manner that the plurality of divided segments can be drawn on the thin plate; incising the thin plate along the contour lines of the segments drawn on the thin plate to mold the plurality of segments, and then forming a plurality of grooves on each of the molded segments; and allowing the plurality of molded segments formed with the grooves to be positioned adjacent to one another and to be engaged with one another to thereby manufacture a single trap. Industrial Applicability
[64] The present invention relates to a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase and a manufacturing method thereof, and more particularly, to such a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase, in which a ring-shaped trap has grooves formed thereon so as to intersect the eruption paths along which flames erupt radially, each of the grooves being positioned at both ends thereof on an inner peripheral edge and an outer peripheral edge of the trap, respectively, so that the eruption of flames generated from the inside the crankcase can be delayed so as to minimize the outward eruption of the flames, and a manufacturing method thereof.

Claims

Claims
[1] In a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines, the trap being installed at an aperture of the crankcase, the improvement wherein the trap is formed in a ring shape having a flame-inducing face of a predetermined width formed between an inner peripheral edge and an outer peripheral edge thereof, the fame- inducing face having a plurality of grooves formed thereon, and wherein each of the plurality of grooves extends in such a manner that both ends thereof are positioned on the inner peripheral edge and the outer peripheral edge of the trap, respectively, and is formed in a shape which is bent to intersect the path along which the flames erupt radially, so that the eruption of flames generated from the inside of the crankcase is delayed so as to prevent the outward eruption of the flames.
[2] The trap according to claim 1, wherein the bent shape of the groove is any one selected from the group consisting of a " > " shape, an "S" shape and a "C" shape.
[3] The trap according to claim 2, wherein the flame-inducing face has an auxiliary annular groove extending continuously in the circumferential direction in such a manner as to intersect the central portion where the plurality of grooves is bent so as to allow the flames to be dispersed thereto.
[4] The trap according to claim 2 or 3, wherein the flame-inducing face has a plurality of coupling holes formed therein in such a manner as to be spaced apart from one another so that a plurality of traps staked on one another is integrally coupled to one another by means of fastening bolts passing through the plurality of coupling holes.
[5] A method of manufacturing a trap for preventing the eruption of flames for a crankcase explosion relief valve of a crankcase for internal combustion engines, the trap constituting a trap device for preventing the eruption of flames installed at an aperture of the crankcase and being formed in a ring shape, the method comprising the steps of: arranging the contour lines of a plurality of divided segments of the same size on a thin plate having a predetermined size in such a manner that the plurality of divided segments can be drawn on the thin plate; incising the thin plate along the contour lines of the segments drawn on the thin plate to mold the plurality of segments, and then forming a plurality of grooves on each of the molded segments; and allowing the plurality of molded segments formed with the grooves to be po- sitioned adjacent to one another and to be engaged with one another to thereby manufacture a single trap.
PCT/KR2008/007305 2008-05-20 2008-12-10 Trap for preventing the burst of flame for pressure control valve of crankcase and manufacturing method thereof WO2009142376A1 (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN106681272A (en) * 2017-02-15 2017-05-17 广东工业大学 Hull planking heating way processing method and device
CN107503846A (en) * 2017-08-04 2017-12-22 浙江工业大学 A kind of flame retardant type explosion-proof valve
CN107575306A (en) * 2017-08-04 2018-01-12 浙江工业大学 A kind of fire-retardant ring of explosion-proof valve
CN109723552A (en) * 2018-12-05 2019-05-07 江苏科技大学 A kind of flow-guiding type explosion-proof valve and explosion-proof flame-retardant implementation method for crankcase

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
KR100981453B1 (en) * 2008-12-11 2010-09-13 현우에스엠티 주식회사 Internal combustion engine cover for installing arrest

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JPH0814509A (en) * 1994-07-01 1996-01-19 Paloma Ind Ltd Pulse burner
KR19990033833U (en) * 1999-05-31 1999-08-16 강은석 trap device for preventing flame of internal combustion engine
KR19990083733A (en) * 1999-07-07 1999-12-06 강은석 method for manufacturing trap for preventing flame of internal combustion engine and thereby apparatus
KR100767283B1 (en) * 2006-10-04 2007-10-17 엠티에이치콘트롤밸브(주) Trap device for preventing flame of internal combustion engine

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JPH0814509A (en) * 1994-07-01 1996-01-19 Paloma Ind Ltd Pulse burner
KR19990033833U (en) * 1999-05-31 1999-08-16 강은석 trap device for preventing flame of internal combustion engine
KR19990083733A (en) * 1999-07-07 1999-12-06 강은석 method for manufacturing trap for preventing flame of internal combustion engine and thereby apparatus
KR100767283B1 (en) * 2006-10-04 2007-10-17 엠티에이치콘트롤밸브(주) Trap device for preventing flame of internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106681272A (en) * 2017-02-15 2017-05-17 广东工业大学 Hull planking heating way processing method and device
CN107503846A (en) * 2017-08-04 2017-12-22 浙江工业大学 A kind of flame retardant type explosion-proof valve
CN107575306A (en) * 2017-08-04 2018-01-12 浙江工业大学 A kind of fire-retardant ring of explosion-proof valve
CN109723552A (en) * 2018-12-05 2019-05-07 江苏科技大学 A kind of flow-guiding type explosion-proof valve and explosion-proof flame-retardant implementation method for crankcase

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