KR102036364B1 - Relief valve for overpressure equipment - Google Patents

Abstract

The present invention relates to a relief valve for a positive pressure device of a vehicle or a facility, which is installed in a vehicle or a facility, forms an accommodating space in which the interior of the vehicle or the facility communicates with air, and on one side of the accommodating space the outdoor of the vehicle or the facility. And a housing having an air vent formed therein, and having a shape corresponding to the shape of the vent to seal the vent of the housing, the vent of the housing being rotated about a rotation axis disposed outside the housing to be disposed within the housing. A movable disk for sealing or opening, a torsion spring which is twisted by the rotation of the movable disk and pressurizes the movable disk in the direction of closing the vent, and is disposed to face the vent in the outer side of the accommodation space to operate when the movable disk is opened. The disk has a rotational limiting surface to abut against it, Intended to include a rotation restricting member is configured such that the distance is adjusted to the surface.

Description

Relief valve for overpressure equipment

The present invention relates to a relief valve for use in a positive pressure device, and more particularly, by maintaining a pressure inside the vehicle or facility higher than atmospheric pressure to prevent the inflow of external air contaminated with a chemical agent or a radioactive fallout. The present invention relates to a relief valve that discharges indoor air so that excessive positive pressure is not generated inside the facility.

A positive pressure device that protects the crew, evacuator or equipment from contamination by combat tanks such as tanks and armored vehicles, or NBC protection facilities, by making the pressure inside the vehicle or facility higher than the external pressure to block outside polluted air from entering the interior. Is provided.

Korean Patent Publication No. 10-247725 (Document 1) discloses a positive pressure device provided in a combat vehicle.

Document 1 discloses the overall configuration of a conventional positive pressure device, after the air is sucked through the air inlet from the outside of the combat vehicle, through the filter for separating dust and the like from the sucked air, and after the air is filtered through the NBC filter The blower is supplied to the room with the crew.

When air is supplied while the vehicle is sealed, positive pressure higher than atmospheric pressure is formed in the interior of the vehicle, thereby preventing unpolluted external polluted air from flowing through the gap of the vehicle.

In addition, a relief valve is provided to allow the air in the room to be discharged to the outside when the pressure in the room exceeds the required positive pressure. When the blower operates to form a positive pressure in the room and exceeds a predetermined pressure, the relief valve is operated to discharge the indoor air to the outside, thereby preventing the positive pressure formed in the room from being raised to a degree harmful to the human body.

On the other hand, as a way to maintain the interior of the combat vehicle at a certain level of positive pressure, it may be considered to provide a sensor for measuring the air pressure in the room to control the operation of the blower according to the pressure measured by the sensor.

However, the positive pressure device of a combat vehicle or NBC is related to the survival of the person inside, so it should work normally even when other equipment is not working due to the damage of the vehicle or equipment, so it is independent of other equipment. It should work.

Therefore, the positive pressure device of a normal combat vehicle or NBC protection facility should not only operate with an independent power source but also operate without using various sensors that may be damaged or malfunction.

A relief valve for a positive pressure device is also used that operates without a sensor or electrical control, and is disclosed in Korean Patent Publication No. 10-1158737 (Document 2), which is conventionally used as such a relief valve.

Literature 2 discloses a relief valve used in a positive pressure device under the name of 'pressure control valve.' The pressure control valve of Document 2 has a slight structural change, but the relief valve having a structure conventionally used in the basic configuration is used. I adopt it.

A relief valve of the type disclosed in Document 2 has a concave disk-shaped cover attached to an interior side of a vehicle and formed with a vent, and is formed in the form of a concave disk disposed on an outer side of the vehicle, the circumference of which is combined with a circumference of the cover. And a movable disk disposed in the space between the base and the cover and linearly moving in the axial direction to selectively seal the vent of the cover.

A compression coil spring is disposed between the movable disk and the base in the movable direction of the movable disk to press the movable disk in a direction in which the movable disk seals the vent of the cover, and an adjustment member for adjusting the compression amount of the compressed coil spring is provided on the base side. have.

The relief valve of such a structure presses the movable disk to the cover side, and the vent of the cover is sealed, and when the air pressure in the room rises, the pressure acts in the direction of opening the movable disk. When the force for opening the movable disk becomes larger than the force for the compression coil spring to press the movable disk, the movable disk moves to the base side and is opened.

In this type of relief valve, by adjusting the pressing force or pressing range of the coil spring by the adjusting member, the movable disk is opened to adjust the pressure at which air is discharged from the room.

However, the conventional relief valve of such a configuration has a limitation that it must be installed horizontally.

Conventional relief valves are configured such that the movable disk is displaced by positive pressure of the room air, but the vertical positioning of the relief valve can overcome the frictional forces associated with the weight and linear movement of the movable disk and its members guiding its linear movement. A positive level of pressure is required.

However, the positive pressure at a level that does not adversely affect the human body is known in the range of 2 to 3.8 mbar, which is not enough to open the movable disk in the vertical arrangement of the relief valve.

Therefore, all conventional relief valves must be arranged horizontally in the operating direction of the movable disk, and have a constraint that they cannot be vertically or inclined.

In addition, the conventional relief valve has a problem that the movable disk does not work because foreign matter or dust penetrates or accumulates in the working space of the movable disk from the outside.

Particularly, in the relief valve having the same structure as the pressure control valve disclosed in Document 2, which is widely used, an opening through which air is circulated from the outside is formed in a plate-shaped base placed in an external atmospheric environment, and a movable disk is placed inside the base. In addition, dust or the like introduced from the opening of the base accumulates between the movable disk and the opening or accumulates in a portion for guiding linear movement of the movable disk, thereby causing the movable disk to become inoperable or the vent is not sealed.

Republic of Korea Patent Publication No. 10-247725 (Document 1) Republic of Korea Patent Publication No. 10-1158737 (Document 2)

The present invention is to maintain the pressure inside the vehicle or facility higher than the atmospheric pressure to prevent the inflow of outside air contaminated with chemical agents or radioactive fallout to discharge the air in the room so that excessive pressure is not generated inside the vehicle or facility The main purpose is to provide a relief valve.

In particular, it is an object of the present invention to provide a relief valve that acts independently of a vehicle or facility.

In addition, the present invention provides a relief valve for a positive pressure device that can be installed in a vehicle or a facility irrespective of the installation posture such as horizontal or vertical by minimizing the effect of the weight of the movable disk of the relief valve or the frictional force of the operation on the relief valve operation. Is to provide.

In addition, the present invention is to provide a relief valve for a positive pressure device having a structure in which dust or the like flows from the outside to the movable portion including the movable disk of the relief valve does not occur.

The above object of the present invention is achieved by the relief valve of the present invention, which is used together with a positive pressure device of a vehicle or a facility, the relief valve of the present invention,

A housing which is installed in a vehicle or facility, forms an accommodation space in which air communicates with the interior of the vehicle or facility, and an air vent is formed in one side of the accommodation space to communicate with the outside of the vehicle or facility,

A movable disk having a shape corresponding to the shape of the vent to seal the vent of the housing, the movable disc being rotated about an axis of rotation disposed outside the accommodating space of the housing to be disposed in the accommodating space to seal or open the vent of the housing;

A torsion spring which is twisted by the rotation of the movable disk and presses the movable disk in the direction of closing the vent;

And a rotation limiting member, which is disposed opposite to the vent on the outside of the accommodation space, has a rotation limiting surface to which the movable disk abuts upon opening of the movable disk, and is configured to adjust a distance from the ventilation port to the rotation limiting surface.

In the relief valve of the present invention, when positive pressure acts on the accommodation space of the housing, the movable disk is rotated by the positive pressure to open the ventilation holes, and air is discharged to the outside through the ventilation holes from the housing space of the housing. This opening causes the torsion spring to twist and presses the movable disk in the closing direction, and when the positive pressure is lowered, the cover closes the vent again.

As a result, if the positive pressure acting on the room becomes excessive, the cover opens the vents and the positive pressure is lowered so that the person in the room does not suffer from excessive positive pressure or damage to the body.

In addition, by adjusting the rotation range of the movable disk by the rotation limiting member, it is possible to adjust the cross-sectional area through which air flows between the movable disk and the vent, thereby limiting the amount of air flowing out through the vent, thereby adjusting the positive pressure acting on the room.

According to the configuration of the present invention, since the movable disk for closing the vent opening is opened and closed by rotation, the force required to operate the movable disk is reduced and the frictional force accompanying the operation of the movable disk is reduced to that of the linear movement method of the prior art. Significantly lower than the relief valve, the valve can be operated by a low positive pressure, allowing the valve to be placed vertically or inclined.

In addition, the relief valve of the present invention,

A rotation shaft disposed in the accommodation space and a rotation bracket freely rotatably coupled to the rotation shaft and fixed to the movable disk;

The torsion spring is composed of a coil spring wound on the rotating shaft, and a part of the coil spring abuts or is fixed to the rotating bracket, and the torsion spring is twisted according to the rotation of the rotating bracket, and the movable disk closes the ventilation hole by the restoring force of the torsion spring. It is pressed in the direction to.

Thus, the configuration of the relief valve is made compact by arranging the torsion spring as a coil spring and winding it on the rotating shaft disposed in the accommodation space to place the elements in the housing which apply the pressing force for rotation and closure of the lid.

As a specific embodiment of the present invention, in the relief valve of the present invention, the torsion spring is composed of a first portion and a second portion wound on the rotation shaft, and an acting portion between the first portion and the second portion, the acting portion being the first portion and It extends from the second portion and abuts against the rotating bracket, and both ends may be fixed to the housing.

According to this configuration, by allowing the torsion springs to act differently in each part, it is possible to implement a number of functions as a single coil spring, making the configuration of the relief valve simpler, more compact, easier assembly and disassembly, There is less risk of failure.

Further, in the relief valve of the present invention, the rotation limiting member is formed with a cover covering the outer surface of the vented portion of the housing, and is coupled to the housing by screws, and adjusts the engagement position of the screw with respect to the housing to adjust the rotation limiting surface. By adjusting the distance between the air vent and the air vent, the rotational range of the movable disk rotating from the position of closing the air vent is adjusted.

According to the configuration, the member restricting the rotation of the movable disk also serves as a function of covering the vent, thereby reducing the inflow and accumulation of foreign matter into the vent and its surroundings and the movable disk, the overall relief valve configuration is compact Done.

1 is a perspective view of a relief valve according to an embodiment of the present invention.
2 is a perspective view from below of a relief valve according to an embodiment of the present invention;
3 is a bottom view of a relief valve according to an embodiment of the present invention.
4 is an exploded perspective view of a relief valve according to an embodiment of the present invention.
5 and 6 are longitudinal cross-sectional views taken along line AA of FIG. 3, FIG. 5 shows a closed state of the relief valve and FIG. 6 shows an open state of the relief valve.
FIG. 7 is a longitudinal cross-sectional view taken along line BB of FIG. 3.

Hereinafter, the configuration and operation of the embodiment of the relief valve for a positive pressure device according to an embodiment of the present invention as a specific content for carrying out the present invention will be described with reference to the accompanying drawings.

The relief valve for the positive pressure device of the present embodiment can be applied as it is to a combat vehicle such as an armored vehicle, a vehicle that starts in a NBC situation, or an NBC evacuation facility as it is, but will be described as being mounted on an armored vehicle in the following description.

The relief valve according to the present embodiment includes a housing 10, which forms a main body of the valve, forms an accommodation space 16 through which the interior of the armored vehicle communicates with air, and an air vent 13 through which air flows out of the armored vehicle is formed. Movable disk 20 which opens or closes the ventilation opening 13 by the rotation which makes the rotating shaft 40 arrange | positioned in the space 16 the rotation axis, and the torsion which presses the movable disk 20 to close the ventilation opening 13 The spring 60 and the movable disk 20 are rotatably coupled to the rotary shaft 40 and the pressing force and the torsion spring 60 according to the rotation of the movable disk 20 between the torsion spring 60 and the movable disk 20. And a cover member 50 which functions as a rotation limiting member for limiting the rotational range of the movable disk 20 and a cover of the ventilation opening 13, which transmits the restoring force.

The housing 10 is formed in the shape of a box having a rectangular cross section by the side wall 11, and forms a rectangular accommodating space 16 therein. One end of the housing 10 arranged downward in the drawing is open to allow air to flow into the interior of the armored vehicle, and the open end has a flange 14 having a mounting hole 141 formed at each corner thereof. It is extended vertically with respect to 11), and is integrally formed, and the housing 10 is fixed to the vehicle body of an armored vehicle by this flange 14.

In the housing, the opposite side of the flange 14 is closed by the upper wall 12, but the upper wall 12 is formed with a rectangular vent 13, the inner wall is wide around the vent 13 in the upper wall 12 The outer side narrow groove 121 is formed, and the sealing 15 of circular cross section is inserted in this groove 121.

The rotating shaft 40 is attached to the accommodation space 16 of the housing. A screw hole 111 is formed in two sidewalls 11 facing each other of the housing, and a coupling screw 43 is inserted therein and screwed to both ends of the rotation shaft 40 so that the rotation shaft 40 is connected to the housing ( It is fixed to 10).

The movable disk 20 is composed of a disk body 21 for closing the vent 13 and elements for rotatably mounting the disk body 21 about the rotating shaft 40.

The disc body 21 is made of a panel having a flat and thin thickness, and generally has a quadrangular shape corresponding to the shape of the air vent, and contacts the seal 15 around the air vent 13 to seal the air vent 13. It has a size extending outward from the circumference. The seal 15 is inserted into the groove 121 of the upper wall 12 of the housing, but part of the surface is exposed to the outside to contact the surface of the disc body 21.

The disc body 21 is disposed on the outer side of the receiving space 16 with respect to the upper wall 12 of the housing to close the vent 13 from the outside, and rotates in a direction away from the upper wall 12 to rotate the vent 13. Open.

The rotating bracket 30 is provided by bending a flat metal plate, and is generally formed in an 'L' shape. The rotating bracket 30 is generally perpendicular to each other, and the first and second portions 31 and 32 and 32 are substantially perpendicular to each other. At both ends of the c), a third portion 33 extending vertically opposite the first portion 31.

The first portion 31 is a portion that is coupled to the disc body 31, and a through hole 311 is provided, and the fixing member 22 is coupled thereto.

The fixing member 22 includes a cylindrical head 221 having a diameter not penetrating the through hole 311 and a coupling part 222 extending from the head. In the coupling part 222, the head 221 is smaller in diameter and the tip is larger in diameter, and the fixing member 22 is deformed and inserted into the through hole 311 of the rotating bracket 30 to be fixed to the rotating bracket 30. I do not leave it. The coupling portion may be formed by a separate screw to be fastened to the fixing member.

On the other hand, while the rotation bracket 30 is described as a separate element from the movable disk 20, the rotation bracket 30 is an element that rotatably mounts the movable disk 20 with respect to the rotating shaft 40, the movable disk ( It is also possible to form a part of 20), and in particular, the rotation bracket 30 may be integrally fixed by welding or the like to the disk body 21 of the movable disk, or one panel may be formed to integrally form the disk body and the rotation bracket. .

Referring to FIG. 5, the female thread is machined on the opposite side of the coupling portion 222 in the head 221 of the fixing member, and a through hole (211 in FIG. 4) is formed in the center of the disc body 21. In this case, the fixing bolt 25 penetrates the through hole 311 and is fastened to the female screw of the head 221 of the fixing member. As a result, the disc body 21 is fixedly coupled to the first portion 31 of the rotary bracket 30 by the fixing member 22.

A through hole 331 is formed in the third portion 33 of the rotation bracket, and the rotation shaft 40 penetrates and is inserted into the through hole 331. In addition, grooves 41 are formed on both end side surfaces of the rotation shaft 40, and the third portion 33 of the rotation bracket is disposed inward of the grooves 41, and each groove 41 has a ' C 'type stop ring 42 is fitted so that the position of the rotation bracket 30 in the longitudinal direction of the rotation shaft 40 is fixed.

The torsion spring 60 is wound around the rotating shaft 40.

The torsion spring 60 has a first portion 61 and a second portion 62 of a coil form coaxial with each other, and an acting portion 63 having a 'c' shape therebetween, and both ends 64 ) Is formed in a straight line. Both the acting portion 63 and the end portion 64 extend outward in the radial direction.

When the rotary shaft 40 is inserted into the rotary bracket 30, the rotary shaft 40 is inserted through the first and second portions 61 and 62 of the torsion spring 60, thereby causing the torsion spring 60 to rotate. It is attached to 40, and the 1st and 2nd parts 61 and 62 are arrange | positioned in the form wound on the rotating shaft 40. As shown in FIG. The acting portion 63 of the torsion spring abuts against the first portion 31 of the rotating bracket 30, and both ends 64 are fixed to the bottom of the side wall 11 of the housing.

When the rotation bracket 30 rotates in the counterclockwise direction in FIG. 5, the first part 31 pushes the acting portion 43 of the torsion spring 40 upward in FIG. 5, and both ends 64 of the torsion spring. ) Is fixed to the side wall 11 of the housing, so that the first and second portions 61, 62 of the torsion spring 60 are torsionally.

The lid member 50 is disposed facing the outer surface of the upper wall 12 of the housing and extends vertically from the upper lid toward the housing 10 from the upper lid 51 and the side wall 11 of the housing. It consists of a side cover 53 of the surrounding shape at intervals.

The lower surface 511 of the upper lid 51 faces the upper wall 12 of the housing in parallel with each other so that a gap G is formed therebetween so that the disc main body 31 is movable in the range of this gap G. The lower surface 511 of the upper lid 51 functions as a rotation limiting surface.

Concave recesses 52 are formed at both end portions of the upper cover 51 of the lid member, and two through holes 521 are formed at each of the two sides, and the through holes (521) are formed in the flange 14 of the housing. Coupling holes 142 having female threads are formed at positions corresponding to 521, respectively.

A coupling bolt 55 is inserted into each through hole 521 of the cover member 50. The coupling bolt includes a bolt head 551 which can be rotated by a hexagon wrench and an extension 552 in which a male thread is processed at the tip. )

Referring to FIG. 7 mainly, the extension part 552 of the coupling bolt 55 is inserted into the through hole 521 to pass through, and is sequentially formed between the upper cover 51 of the cover member and the flange 14 of the housing. The furnace washer 56, the nut 57, the nut 58 and the washer 59 are disposed and screwed through the extension 552 of the coupling bolt, and finally, the coupling hole of the flange 14 of the housing. Screwed to 142.

When one nut 57 is fastened to abut the lower surface of the top cover 51 and the other nut 58 is fastened to abut the upper surface of the flange 14, the fastening bolt 55 does not rotate. The coupling bolt 55 is not loosened unless the nuts 57 and 58 are loosened.

According to this configuration, the gap G becomes large when the coupling bolt 55 is released from the flange 14, and the gap G becomes smaller when the coupling bolt 55 is further tightened, so that the coupling bolt 55 is screwed to the flange 14. By adjusting, the gap (G in FIG. 5) between the top wall 12 of the housing and the surfaces facing each other on the top cover 51 of the lid member can be adjusted.

The operation of the relief valve of the present embodiment having the above configuration will be mainly described with reference to FIGS. 5 and 6, which are cross-sectional views along the line A-A of FIG. 3.

FIG. 5 shows a state in which the disc main body 31 closes the vent 12 of the housing, and FIG. 6 shows a state in which the disc main body 21 opens the vent 13.

In Figures 5 and 6 the upper side of the figure is the outdoor side and the lower side of the armored vehicle, but this is for convenience of the city, on the contrary, the relief valve may be arranged so that the outdoor side is down, horizontally arranged or inclined May be

The bottom surface 143 of the flange 14 of the housing is attached to the vehicle body of the armored vehicle (not shown), and the housing space 16 of the housing is in a state where air in the interior of the armored vehicle passes, so that the housing space 16 in the movable disk 21 is provided. Positive pressure acts on the surface on the side), and atmospheric pressure acts on the upper surface of the movable disk 31, that is, the surface facing the upper lid 61 of the lid member.

In the state shown in FIG. 5, the disc body 21 is placed between the lower surface 511 of the upper lid 51 of the lid member and the upper wall 12 of the housing to abut against the seal 15 of the vent 13. (13) is sealed.

When the positive pressure device (not shown) of the armored vehicle is operated in the NBC situation, and positive pressure is formed in the interior of the armored vehicle, the positive pressure causes the disc body 21 to move away from the vent 13, that is, the cover member 50 facing the vent. Is pressed toward the surface of the (), that is, the lower surface 511 of the upper cover.

When the positive pressure reaches the force capable of rotating the movable disk 20 and the rotary bracket 30, the disc body 21 moves away from the seal 15, and the rotary shaft 30 is moved by the rotary bracket 30 Rotate around 40).

In the rotary bracket 30, the first portion 31 abuts against the action portion 63 of the torsion spring 60, and the torsion bracket 30 rotates due to the positive pressure acting on the disc body 21. The spring 60 is the first portion 61 and the second portion 62 is twisted, the restoring force is transmitted to the disk body 21 through the rotating bracket 30 to vent the disk body 21 vent 13 ) In the direction of closing.

In a state in which the positive pressure is very low or the positive pressure does not act, as shown in FIG. 5, the disc body 21 is pulled by the restoring force of the torsion spring 60 to be pressed against the vent 13 and the disc body 21. ) Abuts against the seal 15 around the vent 13 of the housing to seal the vent 13.

When the positive pressure rises and the disc body 21 is opened, the disc body 21 rotates about the rotation shaft 40 together with the rotation bracket 30.

In the open state of FIG. 6, the edge farthest from the rotating shaft 40 in the disc body 21 abuts against the lower surface 511 of the lid member. Accordingly, the rotation of the rotating bracket 30 and the movable disk 20 is limited to limit the opening of the disc body 21, thereby limiting the cross-sectional area through which the air is discharged from the accommodation space 16 through the vent 13.

The cross-sectional area through which this air can flow limits the flow rate of air discharged from the indoor furnace to the outside through the relief valve by the blower of the positive pressure device, and the positive pressure in the room is determined by the flow rate.

Therefore, the positive pressure in the room can be adjusted by adjusting the position where the rotation of the disc main body 21 which opens the ventilation opening 13 is restricted.

This adjustment is made by changing the gap G between the lower surface 511 of the lid member 50 and the upper wall 12 of the housing.

As the gap G increases, the disc body 21 opens and rotates further, thereby increasing the open cross-sectional area of the vent hole 13, and when the gap G decreases, the rotatable range of the disc body 21 decreases so that the vent hole 13 The open cross sectional area of 작아 becomes small.

The adjustment of this gap G is made by adjusting the length by which the coupling bolt 55 is screwed to the flange 14.

When adjusting the gap G, loosen the nuts 57 and 58 between the top cover 51 of the cover member and the flange 14 of the housing, and wind or unfasten the coupling bolt 55 to the flange 14. After adjusting the fastening length G to adjust the fastening length, the fastening bolts 55 are fixed by fastening the nuts 57 and 58 again.

In this embodiment, the movable disk 20 and the rotating bracket 30 rotate by the positive pressure of the room acting on the disk main body 21, and the vent opening 13 is opened. In the relief valve of, the disk closing the valve makes linear movement in the direction of opening or closing the vent, so when the valve is placed vertically, the force to move the disk linearly is the weight and linear movement of the disk and the member guiding its operation. The frictional force according to must be greater than the combined load.

However, since the positive pressure generated in the room must be maintained at a very low level so that there is no adverse effect on a person, the relief valve does not operate when the relief valve is placed vertically or inclined.

On the other hand, in the relief valve of the present embodiment, since the movable disk 20 for closing the ventilation opening 13 and the rotation bracket 30 for guiding the movement of the relief valve rotate, the friction force according to the linear movement does not work and the lid 30 is closed. And the load according to the mass of the rotating bracket 60 also acts small, it is possible to rotate with a small force compared to the case of linear movement.

In addition, in the relief valve of the present embodiment, since the rotating bracket 30 for guiding the operation of the movable disk 21 can be formed in a thin and flat panel, the weight can be reduced, so that even when the valve is vertically or inclined, the valve has a low positive pressure. The valve can also be opened.

In addition, the valve of the prior art in which the disk has a linear motion is a movable disk for opening and closing the vent in the relief valve of the present embodiment, although the foreign matter such as dust from the outside adheres to the disk or the moving part rapidly increases the friction force, Rotation bracket for guiding the rotation is a rotary motion does not significantly inhibit the rotary motion even if foreign matter is attached to the moving part.

Furthermore, in the relief valve of the present embodiment, since the cover member 50 which limits the rotation range of the movable disk 20 surrounds the space in which the vent hole 13 and the disc body 21 are disposed, the infiltration of foreign matter from the outside is reduced. do.

The configuration and operation of the preferred embodiments of the present invention have been described above, and the present invention is not limited to these embodiments, and various modifications and additions of elements can be made within the scope of the claims.

10: housing 13: vent
16: accommodation space 20: movable disk
30: rotating bracket 40: rotating shaft
50: cover member 60: torsion spring

Claims (4)

A relief valve for a positive pressure device in a vehicle or facility,
A housing which is installed in a vehicle or a facility, forms an accommodation space 16 through which the interior of the vehicle or facility communicates with air, and an air vent 13 is formed in one side of the accommodation space to communicate with the outside of the vehicle or facility ( 10),
A rotating shaft 40 disposed in the accommodation space 16,
It has a shape corresponding to the shape of the vent so as to seal the vent 13 of the housing, is disposed outside the receiving space 16 of the housing to rotate about the rotation axis 40 to seal or open the vent 13 of the housing Movable disk 20,
Rotating bracket 30 is rotatably coupled to the rotating shaft 40 and the movable disk 20 is fixedly coupled,
Consists of a coil spring wound on the rotating shaft 40, a portion of the coil spring is abutted or fixed to the rotary bracket 30, and is twisted by the rotation of the rotary bracket 30 according to the rotation of the movable disk 20, and the vent hole by the restoring force A torsion spring 60 for urging the movable disk 20 in a direction to close the
It is formed of the cover member 50 which covers the outer surface of the part in which the ventilation opening 13 was formed in the housing 10, It is arrange | positioned facing the ventilation opening in the outer side of the accommodating space 16, and is movable at the time of opening of the movable disk 20. FIG. The disk has a rotational limiting surface 511 with which the disk abuts and is coupled to the housing 10 by screws to adjust the engagement position of the screw with respect to the housing 10 so that the clearance between the rotational limiting surface 511 and the vent 13 is reduced. The rotation limiting member of which the rotation range of the movable disk 20 which rotates from the position which closes the ventilation opening 13 by adjusting is adjusted.
Relief valve for a positive pressure device comprising a. delete The method according to claim 1,
The torsion spring 60 includes a first portion 61 and a second portion 62 wound around the rotating shaft 40, and an acting portion 63 between the first portion and the second portion, and the acting portion 63. ) Is a relief valve for the positive pressure device, which extends from the first part 61 and the second part 62 to abut the rotating bracket 30, and both ends 64 abut or are fixed to the housing 10. . delete

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