Windbreak valve device

Abstract

To provide a windbreak valve device capable of preventing an abnormal amount of outside air from flowing indoors by closing an air passage during an explosion or sudden and extremely strong wind.SOLUTION: A windbreak valve device comprises: a pair of flanges 2 that define a space in which a cylindrical body 1 is fitted into a ventilation duct 9; the cylindrical body 1 that is provided between the pair of flanges 2; a valve body 3 that is slidably provided in the cylindrical body 1; a stopper ring 6 that is provided on an inner peripheral surface of the cylindrical body 1, and can engage the valve body 3; and a coil spring 4 that serves as a support shaft for the valve body 3, and constantly biases the valve body 3 toward an opening 10 of the ventilation duct 9.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a windbreak valve device, and more specifically to a windbreak valve device that is incorporated into a ventilation duct that is installed, for example, through a wall to ventilate the room, and that closes the ventilation opening when strong winds such as those caused by an explosion or typhoon occur, thereby preventing the inflow of outside air.

[0002] In particular, the present invention relates to a windbreak valve device suitable for facilities with high levels of shielding and airtightness, such as underground disaster prevention shelters and basements that serve as evacuation facilities in the event of natural disasters or emergency disasters. [Background technology]

[0003] Ventilation ducts are installed on the exterior walls of houses to replace indoor air with outside air. Typically, ventilation ducts are cylindrical with an open bottom to prevent rainwater from entering the house, and ventilation is generally carried out through this opening at the bottom.

[0004] On the other hand, while there have been various underground shelters and basements in the past, these facilities are required to minimize the impact on the interior from blasts, shock waves from the blasts, vibrations, radiation, dust, gas, fires, heat, electromagnetic waves, etc.

[0005] The same is true for residential basements, which are often used as parking spaces, audio rooms, music lesson rooms, living rooms, bedrooms, and other rooms for hobbies and entertainment. An abnormal sudden increase in internal pressure caused by backflowing wind can cause serious damage to the internal structures as well as the bodies of the occupants.

[0006] In other words, when an explosion or extremely strong wind occurs outdoors, it can cause air to flow back into the building through the ventilation opening. For this reason, a mechanism has been proposed that operates using the force of strong winds to close the ventilation opening.

[0007] For example, a valve pivoted at the top rotates in strong winds and blocks the air passage. In this case, however, the valve hangs down during normal times, blocking part of the entrance to the air passage and reducing the area of the air opening, which has the disadvantage that the size must be increased to ensure sufficient air supply.

[0008] In addition, the pivot point of the rotating valve is generally located at the same position as or above the center of gravity of the valve. In such a configuration, the wind pressure that acts to close the valve and the indoor pressure that acts to open the valve are the same, which causes the valve to flutter around the pressure that opens and closes, which can easily generate noise.

[0009] For example, the ventilation device described in Patent Document 1 is installed on the exterior wall of a building and is capable of forming an air passage connecting the inside and outside of the building.The ventilation device has a baffle plate pivotally attached to the top of the exterior opening and a guide part fixed to the bottom of the interior opening and forming a concave shape around the baffle plate.The baffle plate can swing between a lower stopper and an upper stopper, and the baffle plate, which faces diagonally downward toward the interior of the room relative to the lower stopper part, forms an air passage between the guide plate and the baffle plate.The baffle plate, which engages with the upper stopper, blocks the air passage between the guide plate and the baffle plate, thereby preventing wind and rain from entering the room.

[0010] Patent Document 2 describes a ventilation louver in which inner and outer walls with ventilation openings are arranged so that the ventilation openings are staggered, and a gate valve with a ventilation opening is provided between the two walls.The inner wall is inclined so that the gap at the bottom is wider than the outer wall, and the upper end of the gate plate is attached so that it can rotate around a horizontal axis parallel to the side wall.When there is no wind or a weak wind, the gate valve becomes approximately vertical due to its own weight, and the ventilation opening in the outer wall and the ventilation opening in the gate valve communicate and open, i.e., the louver is in a ventilated state, allowing air to circulate between inside and outside the room and ventilation is performed.When the wind strength exceeds a predetermined value (when there is a strong wind), the wind pressure acting on the gate valve pushes the inside, pushing it against the front of the inner wall, causing the ventilation opening in the inner wall to be blocked by the gate valve, preventing outside air from entering.

[0011] Patent Document 3 describes a windbreak valve in which the valve disc does not flap and no noise is generated due to flapping of the valve plate. This windbreak valve consists of a circular frame with an inverted trapezoidal opening frame that is fitted into the air intake port to which it is to be assembled, and a valve disc that has a shape that corresponds to the opening frame and opens and closes the opening frame and is pivotally supported on the lower side of the opening frame, with the upper end face of the opening frame inclined so that it protrudes forward, and a torsion coil spring that constantly urges the valve disc in a direction away from the opening frame is wound around the pivot of the valve disc, thereby creating a difference between the wind pressure that acts to close the valve disc and the wind pressure that acts to open it. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Japanese Patent Application Publication No. 05-295959 [Patent Document 2] Japanese Patent Application Publication No. 06-129163 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-95300 Summary of the Invention [Problem to be solved by the invention]

[0013] However, the above-mentioned conventional technologies have a problem in that they do not address the types of blasts and shock waves caused by blasts, or the extremely strong and sudden winds caused by typhoons, etc. that are anticipated in underground shelters, etc. In view of this problem, the present invention aims to provide a windbreak valve device that can ensure sufficient ventilation during normal times, can close the ventilation path during a blast or a sudden and extremely strong wind, preventing an abnormal amount of outside air from flowing indoors, and can return to a ventilated state when the wind subsides. [Means for solving the problem]

[0014] Therefore, the windbreak valve device of the present invention has a first feature in that it comprises a pair of flanges that define a space in which a cylinder is fitted into a ventilation duct, a cylinder disposed between the pair of flanges, a valve body slidably disposed within the cylinder, a stopper ring disposed on the inner circumferential surface of the cylinder to which the valve body can be engaged, and a coil spring that serves as a support shaft for the valve body and constantly urges the valve body toward the opening of the ventilation duct, one end of the coil spring being fixed to the valve body and the other end being fixed to a load-receiving base, and that the outer circumferential edge of the valve body and the load-receiving base are provided with vent holes through which ventilation can pass under normal conditions.A second feature is that the periphery of the valve body is provided with a tapered surface that is inclined relative to the inner circumferential surface of the cylinder. [Effects of the Invention]

[0015] The present invention configured as above has the following excellent effects. The device can be easily incorporated into various ventilation passages, can ensure sufficient ventilation during normal times, can close the ventilation passage in strong winds to prevent wind from flowing into the building, and can return to a state where ventilation is possible when the wind subsides. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing an embodiment of a windbreak valve device according to the present invention. [Figure 2] 2 is a partial cross-sectional side view showing the state in which the device of FIG. 1 is incorporated into an air passage. FIG. [Figure 3] FIG. [Figure 4] (a) is a plan view showing the valve body, and (b) is a side view. [Figure 5] FIG. 1(a) is a plan view showing the stopper ring, and FIG. 1(b) is a side view. [Figure 6] (a) is a plan view of the load-bearing stand, and (b) is a side view. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0017] Hereinafter, an embodiment of the present invention will be described based on the examples shown in the drawings. As shown in Figures 1 and 2, the cylindrical body 1 has a pair of upper and lower circular flanges 2, and these flanges 2 abut against the peripheral edge of the ventilation duct 9 of the ventilation opening 10 when it is inserted into the duct 9, thereby positioning the cylindrical body 1.Furthermore, by fastening the flanges 2 with bolts 8, the cylindrical body 1 is fixed to the passage portion of the ventilation opening 10.

[0018] 3, the flange 2 is made by stacking first flanges 2a and 2b with different internal gaps according to the internal diameter dimensions of the ventilation duct 9 and the cylindrical body 1, and is appropriately fastened with bolts 8 through bolt holes 2c. In this way, a space is defined in which the cylindrical body 1 is fitted into the ventilation duct 9.

[0019] Inside the cylindrical body 1 are a valve body 3 slidably provided in the space within the cylindrical body 1, a stopper ring 6 provided on the inner circumferential surface of the cylindrical body 1 to which the valve body 3 can be locked, and a coil spring 4 which serves as a support shaft for the valve body 3 and constantly urges the valve body 3 toward the opening of the ventilation duct 9, i.e., the ventilation port 10, one end of the coil spring 4 is fixed to the valve body 3 and the other end of the coil spring 4 is fixed to the load-receiving stand 5. A spring insertion hole 6a is formed in the stopper ring 6, through which the coil spring 4 is inserted vertically (see Figure 5).

[0020] Here, the cylindrical body 1 and flange 2a, the cylindrical body 1 and flange 2b, the cylindrical body 1 and stopper ring 6, the valve body 3 and coil spring 4, and the coil spring 4 and load-bearing stand 5 are fixed together by welding.

[0021] 4, multiple notched recesses 3a are provided on the outer periphery of the valve body 3, forming vent holes that allow ventilation under normal conditions between the valve body 3 and the inner wall surface of the cylindrical body 1. Similarly, as shown in FIG. 6, the load-bearing stand 5 is formed in a cross shape with each vertex rounded to match the inner wall surface of the cylindrical body 1 in a plan view, and vent holes 7 are formed between the load-bearing stand 5 and the fan-shaped spaces that are divided into four directions.

[0022] The coil spring 4 serves as a support shaft for the valve element 3 and constantly urges the valve element 3 toward the opening 10, i.e., acts to move it away from the stopper ring 6. If the resilience of the coil spring 4 is made stronger than the expected wind pressure, it will be difficult for the valve element 3 to close, so it goes without saying that the strength should be set to an optimum value taking into consideration the opening angle, wire diameter, number of turns of the coil spring 4, the material thickness, dimensions, etc. of the valve.

[0023] The valve disc 3 has a tapered surface 3b on its periphery that gradually converges downward, allowing it to slide smoothly within the cylindrical body 1. This tapered surface 3b assists the movement of the valve disc 3. In other words, as the valve disc 3 moves along the inner periphery of the cylindrical body 1, it must slide reliably to prevent the valve disc 3 from stopping midway due to interference between the periphery and the inner surface caused by a slight tilt of the valve disc 3 or a slight discrepancy between the edge surface and the inner periphery. However, depending on the headwind, a random pressure may be generated on the valve disc 3, causing it to lose its vertical position within the cylindrical body 1. The tapered surface 3b on the periphery of the valve disc 3 that is inclined relative to the inner periphery of the cylindrical body 1 solves this problem. [Industrial Applicability]

[0024] As described above, the present invention can be applied to various uses as needed, such as disaster prevention underground shelters, basements, underground safes, and underground warehouses, which are facilities that are designed to withstand blasts and shock waves caused by blasts, as well as severe and sudden strong winds caused by typhoons, etc., which are expected to be generated in underground facilities with high levels of shielding and airtightness. [Explanation of symbols]

[0025] 1 cylinder 2 flanges 2a First flange 2b Second flange 2c Bolt holes 3 Valve body 3a Notch recess 3b Tapered surface 4 coil springs 5 Load-bearing stand 6 Stopper ring 6a Spring insertion hole 7 Ventilation hole (fan-shaped opening) 8 volts 9. Ventilation duct 10 Ventilation vent

Claims

1. A windproof valve device comprising a pair of flanges that define a space in which a cylinder is fitted into a ventilation duct, a cylinder arranged between the pair of flanges, a valve body arranged slidably within the cylinder, a stopper ring arranged on the inner surface of the cylinder to which the valve body can be engaged, and a coil spring that serves as a support axis for the valve body and constantly urges the valve body toward the opening side of the ventilation duct, one end of the coil spring being fixed to the valve body and the other end being fixed to a load-bearing frame, and having air vents on the outer edge of the valve body and on the load-bearing frame that are open to ventilation under normal conditions.

2. 2. The windbreak valve device according to claim 1, wherein the valve body has a tapered surface on its periphery that is inclined relative to the inner circumferential surface of the cylinder.

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