ROTARY ROOF VENT

Abstract

This invention relates to smoke removal and exhaust air ventilation devices with a radial flow, namely to radial-flow (centrifugal) smoke removal and ventilation fans installed on the roofs of buildings, and providing removal of smoke, gases and air from the premises in the event of fire or gas contamination by force of the natural draft. The rotary roof vent comprises a base, a rim, blades, a shaft on which the rim with the blades rotate; wherein the base, rims with the bushings, a cover and the blades are monolithically cast from plastic, the roof vent comprises two rims mounted one in the other and connected by a locking mechanism consisting in three protuberances on the bushings, the blades are installed in the upper and lower rims, with bearings being provided for installation of the upper and lower rims. The cover is made in the form of a hemisphere. The technical result consists in the improvement of technical and operational characteristics, as well as expanding the range of technical means stack. 3 files, 2 figures.

Claims

1. (canceled)

2. (canceled)

3. (canceled)

4. (canceled)

5. A rotary roof vent, comprising: base, rim, blade, shaft, bearings, and an additional rim, both rims are monolithic and provided with bushings, to be installed in such a way that the bushings are inserted into each other by means of bushing bosses, thus forming upper and lower rims in which the blades are installed; a cover is made in the form of a hemisphere, while the base, the rims with the bushings, the cover and the blades are monolithically cast from a plastic; the base has stiffening ribs and installation seat enveloping a first ring by a second ring, the installation seat has a recess; the rim is provided with the stiffening ribs and reinforced installation seat enveloping the first ring by the second ring; and the cover is made with the stiffening rib in the form of a ring from an inner side where latches for connection to the rim are installed, at top and on bottom portions of the blade there are provided two horizontal stiffening ribs and two latches for connection to the rim.

6. A rotary roof vent of claim 5, wherein the base and rims with the bushings, the cover and blades are made of polypropylene. A rotary roof vent of claim 5, wherein the blade of the rotary roof vent is 1 mm thick at a front, with the thickness increased to 1.6 mm at a back portion thereof, with abruptly reduced thickness forming a beveled corner.

Description

[0026] The essence of the invention is illustrated by drawings in which:

[0027] FIG. 1—is a general view of the device; and

[0028] FIG. 2—is a sectional

[0029] view thereof.

[0030] Wherein, [0031] 1—base [0032] 2—rim with the bushing (upper and lower) 3—cover [0033] 4—blade (vane) [0034] 5—bolt [0035] 6—shaft [0036] 7—bearing.

[0037] The rotary roof vent (turbo roof vent) consists of a base 1 and a turbine head, which rotates in one direction regardless of the wind direction. Base 1 is rigid with six ribs additionally fastened together in the middle by a common seat. As a result, the base is rigid and cannot be deformed.

[0038] An installation frame (rims with bushings 2) is attached to the base by a rod (shaft 6), to assure the strength and rigidity of the entire structure, the blades 4 and the aerodynamic cover 3 are attached to the frame.

[0039] Bearings 7 are provided at the top and at the bottom of the installation frame to assure balancing and uniform rotating load.

[0040] The base 1 is provided with six stiffening ribs, and installation seat with a recess. The base is monolithic. Since the base is molded it is perfectly even and symmetrical. The strength of the base is enhanced by six stiffening ribs and reinforced central installation seat that envelopes the first ring with a second one. The installation seat has a recess in the shape of a bushing with a depth of 10 mm, so that the shaft fits tightly and is ideally centered in the vertical direction.

[0041] Rims 2 are monolithic. Due to the utilized molding process, the rims are even and symmetrical. Six stiffening ribs at the bottom and reinforced central seat that envelop the first ring with a second one, contribute to the strength of the rims. There are two rims in a rotary turbo roof vent installed within each other and fixed to each other by three bosses on each of the bushings having 5 mm high. These bosses in the rims are fit tightly into each other to provide additional rigidity to the structure. The cast bushing in the rim is reinforced by three stiffening ribs at the top. The bushing in two rims is one piece that protects the metal shaft from corrosive environment. The blades are tightly inserted into the upper and lower rims; twenty narrowing holes in each rim with protrusions on both sides securely fix each blade. At the base of the rim, under the bushing, there is an installation seat for a bearing which is about 10 mm deep. The bearing seat is embedded into the base of the rim at the bottom, this reliably protects the bearing from aggressive environment and assures a longer service life of the bearing.

[0042] The cover 3 is made in the form of a hemisphere, which does not allow snow and ice to accumulate on it to protect the structure against the imbalance. There are twenty aerodynamic stiffening ribs on the outside to improve the roof vent rotation at low winds. Since the cover is monolithic, it is perfectly smooth, symmetrical, and very durable. There is also a stiffening rib in the form of ring on the inner side with six latches to connect the cover to the rim. It is much larger in size than in prior art roof vents, so it fulfills increased protective function for the inner part of the roof vent, as well as the upper bearing, which reliably protects the inner part and the bearing from aggressive environments and ensures a longer life of the roof vent.

[0043] The blade (vane) 4 is designed with the consideration of the aerodynamic properties of the aircraft wing and repeats its shape. The blade is 1 mm thick at the front with the sickness increased to 1.6 mm at the back of it, and then it abruptly reduces in thickness forming a beveled corner. This shape allows the wind to create more thrust, which is of great importance when the wind has a very low intensity. The blade has two horizontal (vertical in iron roof vents) stiffening ribs at the top and at the bottom, which provide additional strength to the structure. At the top and at the bottom each blade has two cylindrical latches with protrusions on both sides, which securely fix each blade. Since the part is molded, the blade is smooth, symmetrical, and very durable.

[0044] The rotary (active) roof vent is mainly made of the following materials: base, rim with the bushing, cover, blade are made of plastic or polypropylene, bolt and shaft are made of galvanized steel, bearing is made of metal.

[0045] The aerodynamic cover improves the aerodynamic properties of the device, protects against precipitation, a n d prevents the bearing from freezing in winter due to ingress of moisture.

[0046] In view of the above-described design of the roof vent, the following characteristics are achieved: the rigidity of the entire structure, balance during rotation, noiselessness, it also provides improved operational characteristics (uniformity of rotation, rotation speed, rotation duration, minimum wind force to start rotation) and a much longer service life are achieved.

[0047] The device operates in the following manner.

[0048] The wind passing the blades (vanes), makes the head of the device to move, thereby discharging air in the system and improving thrust. Since all parts are made of lightweight materials, wind speed of 0.5 meters per second is sufficient for the operation of the turbo roof vent of the invention. Thus, the stronger the wind, the higher power is generated by the device. The turbo roof vent provides autonomous operation and excludes reverse thrust.

[0049] Thus, the disclosed rotary roof vent has the following properties (advantages):

[0050] 1. The plastic roof vent is completely molded and manufactured using molds and production lines, which virtually eliminates manual labor and guarantees perfect accuracy, symmetry and balance, which ensures uniform rotation. It also contributes to quick and easy production, no rejects, any uniform color by adding dye to raw materials, and, as a result, low production costs is assured.

[0051] 2. All parts are designed in such a way that the entire roof vent is rigid, tightly assembled, does not loosen over time and is durable. There are stiffening ribs on the rims, cover, base and blades, blades are equipped with the cylindrical latches with protrusions on both sides. The construction of the base with the axle inserted into it is also aimed at structural rigidity and fine balance. In the abovementioned design of the roof vent, the rigid framework, balance during rotation, noiselessness are resulted in improved operational characteristics and a much longer service life are achieved.

[0052] 3. The roof vent is designed in such a way to be the leader in the market in terms of rotating properties. This is ensured by aerodynamic shape of the blades and cover, fine balance of the structure and light weight. All this allows the invention to start rotation at a lower wind and rotate at a higher speed for longer time, which ultimately provides a greater cumulative total useful life of the roof vent, and, accordingly, a much more efficient operation of the ventilation system as a whole.

[0053] 4. The roof vent of the invention is designed in such a way to protect all iron parts of the device (bearings, shaft, bolts) against corrosive environments by mean of plastic. Upper bearings and bolt are covered by spherical cover, shaft is covered by the rim bushings, lower bearing and bolt are embedded in the lower rim. This ensures the durability of the metal elements and, as a result, a longer service life of the roof vent. This is because the plastic itself does not change its characteristics over time. In addition, the protection of metal parts ensures uninterrupted operation of the roof vent throughout the winter, unlike metal samples, in which moisture freezes in winter and the roof vent stops rotating until the thaw. It also eliminates the frequent maintenance of the roof vent, consisting in lubrication of the bearings, which can be difficult to do on the roof. The replacement of metal parts in the presented model is very easy and the service life of the roof vent can thus be increased several times (in metal samples, the bearings and axle cannot be replaced separately).