JPH10280975A - Automatic pressure adjusting valve device for internal combustion engine which is equipped with flame injection preventing trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strictly operate a movable disk which is opened and closed by inner pressure of a crank case, and to cut blowout of flame to prevent human life and equipment around the crank case from damaging when flame caused by fire or explosion in the crank case is blown out of an opening. SOLUTION: By using a conical spring 4 as a spring energizing a movable disk 2, forming projecting and recessed wrinkles 6a with a constant pitch between a sheet 1 and a lid 5, and fixing a trap 6 which is formed by winding an almost outward V-shaped metal plate whose cross section expands outward into the shape of a coil spring, flame which is blown out of an opening 13a after fire or explosion in the crank case 13 is prevented from expanding widely outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine crankcase which is installed in an opening formed in a crankcase of an internal combustion engine so that the pressure inside the crankcase of the internal combustion engine is always maintained at a predetermined pressure or less. Oil and gas inside the crankcase are overheated and ignited due to the carelessness of the engine operator or the equipment itself, while preventing damage to the engine and preventing defects in related engine equipment. A crankcase for an internal combustion engine equipped with a flame ejection prevention trap invented to prevent a fire from being excessively ejected from the opening due to causing a fire and causing fatal damage to the human body and mechanical equipment around the crankcase The present invention relates to an internal automatic pressure control valve device.

[0002]

2. Description of the Related Art Conventionally, a cover is fixed to an opening of a crankcase with bolts and nuts, and a movable disk is resiliently applied to the cover by a spring so that a pressure inside the crankcase is regulated (usually 0.03). When the pressure rises above -0.05 kg / cm ² ), the movable disc is pushed outward, so that excessive pressure can flow out to the outside through the opening, so that the inside of the crankcase can always be maintained at a normal pressure. The automatic pressure control valve device inside the case is widely known.

[0003]

This is because the spring for making the movable disk resilient has the same single-diameter shape (spring wound spirally with the same diameter). In addition to the inability to operate sharply, there was a case where a fire occurred inside the crankcase or a wide explosion of fire caused by explosion caused a lot of damage to the human body and various equipment around the crankcase. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and not only can the movable disk opened and closed by the internal pressure of the crankcase be sharply actuated, but also a fire inside the crankcase can be prevented. Automatic pressure regulation inside a crankcase for an internal combustion engine equipped with a flame ejection prevention trap that shuts off the flame emission when the flame due to the explosion is ejected from the opening, and prevents human life and damage to equipment around the crankcase (Escape) valve device is provided.

[0005]

According to the present invention, a cover is fixed to an opening of a crankcase of an internal combustion engine, and a movable disk is resiliently mounted on the cover by a spring to automatically open the opening. The movable disk is made to resilient by a conical spring whose one diameter is gradually narrower, while the wrinkles between the outer periphery of the movable disk and the lid are uneven at regular intervals. Further, the present invention is characterized in that a flame ejection prevention trap, which is formed by spirally winding a metal plate having a generally outwardly V-shaped cross section outwardly expanded like a coil spring, is provided. That is, the seat 1 in which the O-ring 3 is inserted and fixed in the opening 13a of the crankcase 13 is fixed with the bolt 7, the gap is maintained by the stud bolt 7 and the pipe 10, and the lid 5 is fixed with the nut. 9, the movable disk 2 is brought into close contact with the O-ring 3, and is urged by a spring 4. The spring 4 uses a conical spring 4 having a diameter gradually reduced to one side. The part is brought into contact with the lid 5, the large-diameter end is brought into contact with the movable disk 2 so as to repel, and outside the several stud bolts 7, the unevenness is formed at a constant pitch between the sheet 1 and the lid 5. A trap 6 formed by winding a metal plate having a generally outward V-shape having a wrinkle 6a and having a cross section expanded outward in a coil spring shape is fixed, and a fire inside the crankcase 13 is prevented. Or explosion occurs and the opening 13 Flame is an automatic pressure regulating valve device for an internal combustion engine annexed flame blowout preventer trap to prevent the spread widely outside ejected from.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a front view in which a part of the present invention is cut, FIG. 2 is an exemplary view of the present invention, and FIG. 5 is a sectional view of a main part of the present invention.

The seat 1 to which the O-ring 3 is inserted and fixed is fixed to the opening 13a of the crankcase 13 with bolts 7, and a pipe 10 for maintaining an interval is inserted into the bolt 7. The cover 5 is fixed with a nut 9, and the movable disk 2 is brought into close contact with the O-ring 3 and is made to resilient by a spring 4. The spring 4 has a diameter gradually reduced toward one side. The end having a small diameter is brought into contact with the lid 5 and the end having a large diameter is brought into contact with the movable disk 2 so as to be resilient. Outside the several bolts 7, there is a gap between the sheet 1 and the lid 5. , Uneven wrinkles 6 at regular intervals
a trap, which is formed by spirally winding a substantially outward V-shaped metal plate having a cross section that expands outward like a coil spring, is fixed to the inside of the crankcase. When a flame or explosion occurs, it is configured to prevent the flame ejected from the opening 13a from spreading widely to the outside.

In the figure, reference numeral 8 denotes a washer, 1
1 is a hexagon bolt, 12 is a spring washer, and 15 is a small hole.

The present invention constructed as described above is installed and used in the opening 13a of the crankcase 13 of the internal combustion engine as shown in FIG.
When the internal pressure of the movable disk 2 is normal, the force applied to the inner surface of the movable disk 2 is smaller than the elastic force of the spring 4, so that the movable disk 2 comes into contact with the surface of the sealing O-ring 3 and airtightness is maintained (FIG. 5) When the pressure inside the crankcase 13 is higher than normal, the force applied to the inner surface of the movable disk 2 is larger than the spring force of the spring, and the movable disk 2
When the excess pressure inside the crankcase 13 escapes to the outside through the opening 13a and becomes normal pressure, the movable disk 2 is resiliently moved by the spring 4 by the elastic force of the spring 4 as shown in FIG.
It returns to the original state like. The above operation is the same as a known operation.

In the above operation, since the movable disk 2 is resilient by the conical spring 4, the conventional one-shape spring having the same diameter (spring spirally wound with the same diameter) is used.
The operation can be sharpened in response to a change in the internal pressure of the crankcase 13. When an explosion or fire occurs in the crankcase 13 and the flame is ejected to the outside through the opening 13a, the flame becomes uneven wrinkles 6a. The flame is extinguished by the contracting action or the cooling effect while being discharged to the outside through the gap and the small hole 15 of the trap 6 formed as described above. That is, after the flame is weakened by the constriction effect while flowing through the narrow gap, the flame is extinguished while flowing outward while being cooled from the generally outward V-shaped outer cooling surface whose cross section is expanded outward. It becomes.

[0011]

As described above, according to the present invention, the opening / closing operation of the movable disk is sharply operated by the pressure inside the crankcase, so that the internal pressure inside the crankcase can always be maintained at a good normal pressure. The trap prevents the flame emitted by the fire or the explosion inside from being spread widely by the trap, so that there is an effect that it is possible to prevent human life and damage to the equipment around the crankcase.

[Brief description of the drawings]

FIG. 1 is a front view of a part of an automatic pressure control valve device according to an embodiment of the present invention.

FIG. 2 is an exemplary illustration of the embodiment.

FIG. 3 is a perspective view of a main part of the embodiment.

FIG. 4 is a sectional view of a main part of the embodiment.

FIG. 5 is a partial sectional view of the embodiment.

FIG. 6 is an operation sectional view of a main part of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet 2 Movable disk 3 O-ring 4 Spring 5 Lid 6 Trap 6a Uneven wrinkle 7 Bolt 9 Nut 10 Pipe 13 Crankcase 13a Opening

Claims (1)

[Claims] 1. An opening (13) in a crankcase (13).
a) The sheet (1) is fixed to the sheet (1), the cover (5) is fixed while maintaining a gap between the sheet (1), and the movable disc (2) is brought into contact with the sheet (1). , Spring (4), the spring (4) uses a conical spring (4) having a diameter gradually reduced to one side, the narrow end of which is brought into contact with the lid (5), The wide end is brought into contact with the movable disk (2) so as to be resilient, and the opening (1)
On the outside of 3a), there are irregular wrinkles (6a) at a fixed pitch between the sheet (1) and the lid (5), and the cross-section of the sheet (1) and the lid (5) is outwardly expanded. A trap (6) formed by winding a metal member in a coil spring shape is fixed, and a fire or an explosion occurs inside the crankcase (13), and the flame ejected from the opening (13a) spreads to the outside. Automatic pressure control valve device for internal combustion engine equipped with a flame ejection prevention trap that prevents spreading.