JP3030642U - Natural ventilation equipment for livestock houses - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a natural ventilation device installed at an exhaust port of a livestock house or the like, which is reliably exhausted without external air flowing in even if wind blows. SOLUTION: A support frame 11 is attached to the inside of an outlet of an exhaust pipe 10 installed in a livestock house, and a lower end portion 26 of a fixed shaft 12 is coaxially fixed to the exhaust pipe 10 on the support frame, and an upper end portion 24 of the fixed shaft 12 is fixed. A head 15 of a fan 14 is rotatably mounted on a shaft bearing 13 via a thrust bearing 13, a ring 20 is rotatably mounted on a middle portion 25 of a fixed shaft 12 via a bearing 19, and a fan is mounted on the ring 20 via an arm 21. The skirt 16 of the body 14 is connected, and a large number of blades 17 are passed between the head 15 and the skirt 16 to form a side peripheral surface of the fan body 14, and in the horizontal cross section, both ends of the blade 17 are separated from the axial center of the fan body 14. The wind turbine was formed by shifting the radii up to, and the fan body 14 was rotated by the wind, and the air was exhausted from between the blades 17 by the device.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a natural ventilation device installed at an exhaust port of a livestock house or the like.

[0002]

[Prior art]

 The conventional natural ventilation system for exhaust, which does not use power, is a mere chimney-shaped cylinder, and the exhaust opening was opened horizontally to prevent the inflow of rainwater. There is also used one in which an upper part with a unidirectional radial exhaust opening is attached to the lower part so as to be rotatable around a vertical axis, and the direction of the exhaust opening is always aligned with the wind direction by a wind direction plate. There is.

[0003]

[Problems to be solved by the device]

 In the conventional device, when the wind is strong, the outside air conversely enters through the exhaust opening, and not only the odor inside the barn cannot be discharged, but also the air inside the barn is disturbed. The present invention was made to solve this problem.The purpose of this invention is to prevent outside air from entering through the exhaust port even when the wind is strong, and to prevent internal odors from being exerted by the force of the wind. It is to provide a natural ventilation device that is more effectively discharged.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the means adopted by the present invention is to fix a supporting frame to a cylindrical exhaust port fixed to a building, and to fix the lower part of the fixed shaft to the supporting frame coaxially with the connecting port. A fan is rotatably attached to the upper part of the shaft so as to cover the connection port, and blades are provided on the side peripheral surface of the fan to allow the wind to rotate the fan and discharge the internal air. .

[0005]

[Embodiment of device]

 An embodiment of the present invention will be described based on vertical and horizontal cross sections of the apparatus shown in FIGS. A support frame 11 is fixed to the outlet of an exhaust pipe 10 installed on the roof of a livestock building, and the lower end of a fixed shaft 12 is fixed to the support frame 11. The fixed shaft 12 projects coaxially from the exhaust pipe 10. A thrust bearing 13 is mounted on the upper end of the fixed shaft 12, and a spherical fan body 14 is rotatably supported via the thrust bearing. The fan body 14 is composed of an inverted dish-shaped head 15, a cylindrical skirt 16, and a plurality of blades 17 provided therebetween. The thrust bearing 13 is housed between the central lower surface of the head 15 and the support plate 18 attached below it.

Above the support frame 11, a ring 20 is rotatably fitted onto the fixed shaft 12 via a solid bearing 19 made of synthetic resin. The arm 21 is radially extended from the ring 20 and its tip is fixed to the skirt 16. The plurality of blades 17 have the same shape and size and form the side peripheral surface of the fan 14. In the horizontal cross section, both ends of each blade 17 are located on concentric circles with different radii around the fixed shaft 12, so the fan 14 is a wind turbine that rotates around the fixed shaft 12, and from which direction the wind flows. The fan 14 rotates even when it is blown. When the fan body 14 rotates, the air inside the blades 17 is subjected to the centrifugal force to be discharged from the gaps between the blades 17 by the blades 17. That is, when the wind blows, the fan 14 rotates and natural exhaust is performed.

[0007]

【Example】

 The device of the present invention will be described in detail with reference to the embodiments shown in the drawings. As shown in FIGS. 1 and 2, the rotating fan 14 has a spherical shape similar to the shape of a bun, and covers the outlet of the exhaust pipe 10 fixed to the roof of a livestock house or the like. The fan 14 includes an inverted dish-shaped head 15 at the top, 21 blades 17 with the upper end riveted to the peripheral edge of the head, and a cylindrical skirt 16 with the lower end of the blade riveted. Consists of. Each blade 17 has a shape that forms a part of a spherical surface, and 21 blades 17 form the side peripheral surface of the fan 14.

As shown in FIGS. 3 and 4, feet 23 radially extending from the central portion 22 of the support frame 11 are riveted to the inner peripheral surface of the outlet of the exhaust pipe 10. The central portion 22 of the support frame 11 has two stages, the upper and lower stages, and the fixed shaft 12 is coaxially fixed to the exhaust pipe 10 at the central portion. The lower end portion 26 of the fixed shaft 12 is a screw shaft having a smaller diameter than the intermediate portion 25, and the lower end portion 26 is fitted into the lower fixing hole 27 of the central portion 22 to support the fixed shaft 12 and fixed by the nut 28. . The upper end 24 of the fixed shaft 12 is also a shaft having a smaller diameter than the intermediate part 25, and the upper end 24 is fitted in the thrust bearing 13. The thrust bearing 13 is inserted and held between the lower surface of the center of the head 15 and a hollow disk-shaped support plate 18 riveted thereto.

A solid bearing 19 made of synthetic resin is fitted to an intermediate portion 25 of the fixed shaft 12, and its bearing is held by a ring 20 having a double hollow disc shape. The tips of the three arms 21 extending radially from the ring 20 are riveted to the inner peripheral surface of the skirt 16. Thus, the support frame 12 supporting the fixed shaft 12 has a stable fixed structure having the upper and lower central portions 22 and the fan body 14 is supported by the fixed shaft 12 via the upper and lower two bearings 13 and 19. Due to the structure, the rotation is smooth and stable.

As shown in FIG. 4, reinforcing rims 29 are formed at both ends of each blade 17 in a horizontal section to prevent the blades from being deformed. Both ends of the 21 blades 17 are arranged at equal intervals on the circumference around the fixed shaft 12, but the diameter of the circumference where one is arranged is larger than the diameter of the circumference where the other is arranged. There is a gap between them. Since the blades 17 arranged in this way form a wind turbine, the fan 14 rotates about the fixed shaft 12 regardless of the direction in which the wind blows. When the fan 14 rotates, the internal air is exhausted from the gap between the blades 17 and the roots 17 by the action of centrifugal force, so there is no risk of outside air passing through the fan 14 and entering the inside, and the wind blows. The more you blow, the more the ventilation of the barn progresses.

[0011]

[Effect of device]

 As described above, in the device of the present invention, the fan that rotates when it receives wind and discharges the internal air is provided at the outlet of the ventilation tube.Therefore, even if the wind is strong, outside air can enter the stall through the exhaust tube. On the contrary, it has an excellent effect that the ventilation in the livestock house is smoothly performed by the wind.

[Brief description of drawings]

FIG. 1 is a side view of an apparatus according to an embodiment of the present invention,

2 is a plan view of the apparatus of FIG. 1,

3 is a central vertical sectional view of the device of FIG. 1,

4 is a central horizontal sectional view of the device of FIG. 1,

[Explanation of symbols] 10: Exhaust stack, 11: Support frame, 12: Fixed shaft, 13: Thrust bearing, 14: Fan body, 15: Head, 16: Skirt, 17: Blade, 18: Support plate, 19: Bearing , 20: Ring, 21: Arm, 22: Center part, 23: Foot, 24: Upper part, 25: Middle part, 26: Lower part, 27: Fixing hole, 28: Nut, 29: Reinforcing rim

Claims (1)

[Scope of utility model registration request] 1. A support frame (11) is attached inside the outlet of an exhaust stack (10) installed in a livestock shed or the like, and a fixed shaft (1) is attached to the support frame.
The lower end (26) of 2) is coaxially fixed to the exhaust pipe, and the head (15) of the fan (14) is rotatably attached to the upper end (24) of the fixed shaft via the thrust bearing (13). The ring (20) is rotatably attached to the intermediate portion (25) of the fixed shaft via the bearing (19), and the skirt (16) of the fan body is connected to the ring via the arm (21). Then, a large number of blades (17) are passed between the head and the skirt to form the side peripheral surface of the fan body, and in the horizontal cross section, there is a difference in the distance from the axis of the fan body to both ends of the blade. A natural ventilation device for a livestock house or the like, characterized in that a fan is attached to the fan to rotate the fan by receiving wind to discharge the internal air from between the blades.