JPH03156232A - Double reversing type ventilation device - Google Patents

Abstract

PURPOSE:To facilitate an adjustment or a maintenance work by a method wherein a ventilation device is covered by a casing having divided components to be coupled with screws and one component forming this casing has a coupling port member for use in connecting both ventilation ducts or the like at both ends of the component member. CONSTITUTION:A casing member 7a has a confirming opening 14 capable of confirming each of axial flow vane wheels 2 and 2a at positions corresponding to each of the axial flow vane wheels 2 and 2a within a main body 1. Each of the axial flow vane wheels 2 and 2a can be directly acknowledged with eyes. A ventilation duct is connected to each of connection members 10 of the casing member 7 and then ventilation is carried out through the ventilation ducts. A state of rotation of each of the axial flow vane wheels 2 and 2a can be acknowledged directly with eyes from the confirming opening 14. An air flow or an amount of air at an end part of each of the ventilation ducts can be checked. After mounting, a mere removal of the casing member 7a from the casing member 7 through releasing of a screw 13 enables the main body 1 to be removed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a counter-rotating type ventilation device in which a pair of axial flow impellers and a drive motor for rotating the impellers are arranged in series within a cylindrical main body. It is.

[Prior Art] FIG. 5 is a sectional view showing a conventional counter-rotating type ventilation device disclosed in, for example, Japanese Patent Publication No. 61-4895. That is, this contra-rotating type ventilation device has an axial flow impeller 21.
A and a drive motor 22, 22a for rotationally driving this are arranged in series. - set of axial flow impellers 21;
and the drive motor 22 are connected by one motor mounting leg 23.
The other set of axial flow impeller 21a and drive motor 22a are each mounted within the main body 20 by separate motor mounting legs 24a.

In the counter-rotating type ventilation system described above, two axial flow impellers 21 are rotationally driven by respective drive motors 22 and 22a.
．． Although the rotating direction of 21a is opposite, the air blowing direction is unidirectional as shown by the arrow in the figure, and ventilation can be achieved by connecting a ventilation duct (not shown), etc., and connecting one side indoors and the other outdoors. It is used for

[Problems to be Solved by the Invention] In conventional counter-rotating type ventilation systems, the operation after installation is confirmed by a trial run, but due to the structure, the state of the axial flow impellers 21, 21a cannot be viewed from the outside. Since this cannot be seen, the appropriateness of the operation is determined based on the wind flow and wind I at the terminal of the ventilation duct. However, the flow and volume of air at the terminal of the ventilation duct are factors that change depending on the piping form and length, so the appropriateness of the operation may depend on inappropriate judgment, and the operation may not be normal. In some cases, it was used as is. Further, in order to perform adjustment or maintenance of the axial flow impeller 21.21a after installation, all piping of the ventilation duct must be removed. This invention was made in order to solve the conventional problems, and the first purpose is to use a counter-rotating type that facilitates adjustment and maintenance of the axial flow impeller etc. after installation. The second objective is to obtain a counter-rotating type ventilation system whose operation after installation can be visually confirmed.

[Means for Solving the Problems] A counter-rotating type ventilation device according to the present invention has a cylindrical shape made of resin, and has an axial flow impeller and a rotating impeller inside the main body, which is provided with seal packings on the outer periphery of both ends. A pair of drive motors are arranged in series, and the main body is made up of a split casing made of two semi-cylindrical members joined by screws. , and one member constituting this casing is equipped with connection port members for connecting ventilation ducts and the like at both ends thereof.

Another contra-rotating type ventilation device according to Manako's invention is made of resin that can be seen through in a cylindrical shape, and has an axial flow impeller and a drive that rotates the impeller inside the main body, which is provided with seal pads on the outer periphery of both ends. A pair of motors are arranged in series, and this main body is
It is composed of two semi-cylindrical members and is covered with a split casing that is joined by screws, and one member that makes up this casing is equipped with connection port members at both ends for connecting ventilation ducts, etc. Furthermore, the casing is provided with confirmation openings through which each axial flow impeller within the main body can be visually recognized.

[Function] In the counter-rotating ventilation system of the present invention, one member constituting the casing can be removed while it is connected to the ventilation duct, etc., and by removing one member constituting the casing, , the main body can be removed without removing the piping.

In addition, in other counter-rotating type ventilation systems of the present invention, by removing one member constituting the casing, the main body can not only be removed without removing the piping, but also can be used for confirmation while still in the staged construction state. The state of the axial flow impeller inside the main body can be visually confirmed through the opening.

[Embodiment] FIGS. 1 to 4 all show an embodiment of a counter-rotating ventilation system according to the present invention. That is, in the counter-rotating type ventilation system of this example, two axial flow impellers 2.2a and two drive motors 3, 3a for rotationally driving the impellers are arranged in series in a cylindrical main body 1. Axial flow impeller 2, 2a
is rotated in the opposite direction.

The two drive motors 3, 3a each have a motor handle mounted on a leg 4.
, 4a is fixed to a holding part formed in the central part of the parts by screws. The main body 1 is formed of a transparent resin into a cylindrical body whose inside can be seen through, and double ribs 5 are integrally formed in the circumferential direction at intervals on the outer periphery of the opening at both ends, and the vortex between each rib 5 is formed integrally with the outer periphery of the opening at both ends. A seal packing 6 is attached to the part.

Each motor mounting leg 4, 4a to which the drive motor 3, 3a is fixed
The arc-shaped flanges formed at the free ends of the legs are fitted into the main body 1, and each is attached to the main body 1 by tightening screws from the outside of the main body 1. Each axial flow impeller 2,
2a are respectively attached to rotating shafts of drive motors 3 and 3a extending in the same direction, and are rotated in opposite directions by the drive motors 3.3a. However, the air blowing direction is unidirectional as shown by the arrow in FIG. 1, as in the conventional example.

The main body 1 having the above structure is entirely covered on the outside by a casing 8 formed by joining two semi-cylindrical casing members 7.7a. The casing member 7 has a joining flange 9 projecting in the radial direction at an edge parallel to the center line of the semi-cylindrical portion, and a cylindrical connection port member 10 is fixed to each end of the joining flange 9. Furthermore, the casing member 7a has a joining flange 11 extending in the radial direction at an edge parallel to the center line of the semi-cylindrical portion. A hook 12 for hanging is bent on one side of the joining flange 11.

The casing parts 7, 7a are connected to each other by a joining flange 9.11.
By joining them together and fastening them with screws 13, a cylindrical casing 8 is constructed, and the main body 1 is covered with a seal packing 6. The casing member 7a is provided with a confirmation opening 14 at a position corresponding to each axial flow impeller 2, 2a in the main body 1, through which each axial flow impeller 2゜2a can be visually recognized. Each axial flow impeller 2°2a can be directly observed. A ventilation duct (not shown) is connected to each connection port member 10 of the casing member 7, and ventilation is performed through the ventilation duct.

The operation of the counter-rotating type ventilation system after installation can be confirmed by directly observing the rotation of each axial flow impeller 2, 2a through the confirmation opening 14, as well as by checking the rotation of each axial flow impeller 2, 2a at the terminal of the ventilation duct. This can be done by checking the wind flow and air volume, and the appropriateness of the operation can be accurately determined. Therefore, there are almost no cases where the device is used without normal operation.

Furthermore, for adjustment and maintenance of the axial impellers 2 and 2a after installation, the main body 1 can be removed by simply removing the casing member 7a from the casing member 7 by removing the screws 13, without removing the ventilation duct piping. , it can be easily carried out in the installed construction state. Since the confirmation opening 14 is sealed on both sides by the seal packing 6 of the main body 1, there is no air leakage from this part.

In addition, in the counter-rotating ventilation system, the first-stage axial-flow impeller 2 and the second-stage axial-flow impeller 2a have blade shapes in which the flow direction is the same but the rotation direction is different, and by reversing each other,
A high static pressure can be obtained by rectifying the swirling fluid pressure component generated after the second stage and recovering the swirling fluid pressure component as static pressure. Therefore, due to incorrect wiring etc., the axial flow impeller 2
, 2a rotate in the opposite direction or do not rotate, the blowing performance will be extremely reduced, so it is essential to confirm the operation through a trial run after installation.

[Effects of the Invention] As described above, according to the counter-rotating ventilation system of the present invention,
One member constituting the casing can be removed while remaining connected to the ventilation duct, etc., and by removing one member constituting the casing, the main body can be removed without removing the piping. Therefore, adjustment and maintenance of the axial flow impeller can be carried out in the installed state.

Furthermore, according to the other counter-rotating type ventilation system of the present invention, the adjustment and maintenance of the axial flow impeller can be easily carried out in the installed state, and the operation of the axial flow impeller can be directly visually observed from the outside. , it becomes possible to confirm reliable operation.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a counter-rotating type ventilation device showing an embodiment of the present invention, FIG. 2 is a perspective view of the main body of the same, and FIG.
The same figure is an exploded perspective view showing the configuration of each motor mounting leg and each drive motor, etc., and FIG. , 1 is the main body, 2, 2a are axial flow impellers, 3, 3a are drive motors, 4, 4a are motor mounting legs, 6 is seal packing, 7, 7a are casing members, 8 is cooling, 10 is connection port member , 13 is a screw, and 14 is an opening for confirmation. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A cylindrical main body made of resin with seal packings provided on the outer periphery of both ends, a pair of axial flow impellers arranged in series within this main body, a drive motor that rotationally drives the impellers, and a semi-cylindrical body. A split-structure casing, which is composed of two shaped members and covers the entire outside of the main body by joining with screws;
A counter-rotating ventilation system that is equipped with connection port members that are attached to both ends of one of the members that make up the casing and connect to a ventilation duct or the like. (2) A cylindrical main body made of resin that can be seen through, with seal packing on the outer periphery of both ends, a pair of axial flow impellers arranged in series within this main body, and a drive motor that rotationally drives the impellers. , a split casing consisting of two semi-cylindrical members that are joined by screws to cover the entire outside of the main body, and a connection that is attached to each end of one of the members constituting this casing and connects a ventilation duct, etc. A counter-rotating type ventilation device comprising: a mouth member; a confirmation opening formed in the casing, through which each axial impeller in the main body can be visually recognized;