JPH0448426Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention This invention relates to an air pipe support ring that is fixed inside a flexible air pipe connected to a blower such as a fan or a blower.

(b) Background of the invention For example, when the above-mentioned flexible blower pipe is connected to a blower, the air supplied from the blower comes into contact with the inner peripheral surface of the blower pipe, causing air to be blown through the center of the pipe. The flow velocity of the blast air blown along the inner peripheral surface of the pipe is slower than the flow velocity of the blast air, and many small vortices are generated in the direction of the blast at the boundary between the center and outside of the pipe. This causes turbulence in the flow of the blast air, making it difficult to blow the blast air straight along the blast pipe.

In addition, while the above-mentioned blower is blowing air, the end of the blower tube on the discharge side is violently vibrated by the blowing air, so this vibration may cause cracks or tears in the end of the blower tube. etc., which ultimately results in damage to the end of the blast duct.Furthermore, since the blast duct tends to deform due to stress applied from outside the tube, the diameter of the blast duct may be partially reduced. This poses a problem, such as creating resistance to air blowing and making it difficult to blow a constant amount of air.

(C) Purpose of the invention This invention has a unique structure that fixes a support ring with straightening blades installed inside the blast pipe, thereby rectifying the flow of air and blowing it straight. An object of the present invention is to provide a blower tube support ring that can prevent blower tubes from being damaged by blowing air, and can smoothly blow air at a constant flow rate to maintain its effectiveness.

(d) Structure of the device This device fixes a support ring made of a hard material and having the same diameter as the inside diameter of the air pipe inside a flexible air pipe, and also fixes a support ring made of a hard material with the same diameter as the inside diameter of the air pipe. The present invention is characterized in that it is a blow pipe support ring on which straightening blades are installed to straighten the blow air along the direction.

(E) Function of the device In this device, a blower tube support ring is fixed inside a flexible blower tube, and the air supplied from, for example, an air blower is rectified by a rectifying blade.

(f) Effects of the invention According to this invention, the air is rectified by the straightening blades of the air pipe support ring and the air is blown straight along the air pipe, so the vibration of the air pipe due to the air is eliminated, and the vibration causes the pipe to It is possible to reliably prevent the ends from being damaged, and by fixing the blower tube to the blower tube support ring, the blower tube is reinforced and prevents the blower tube from deforming due to stress applied from outside the tube. As a result, obstacles such as turbulence and pipe deformation that create resistance to air blowing are removed, and air blowing at a constant air volume can be carried out smoothly. , it is possible to maintain the effects of ventilation and air cooling in the tunnel by blowing air.

(g) Example of the invention An example of the invention will be described below in detail based on the drawings.

The drawings show a blower tube support ring fixed inside the blower tube connected to the blower, and in FIGS. 1 and 4, the blower tube support ring 1 has the same inner diameter as the flexible blower tube 2. A support ring 3 is formed on the diameter of the support ring 3 using a hard material such as a difficult synthetic resin or metal, and two rectifier blades 4 are fixed orthogonally to the inner surface of the support ring 3 in the radial direction. .

As shown in FIG. 2, each of the above-mentioned straightening vanes 4, 4 is made of the same hard material as the support ring 3, and is formed to have a streamlined cross-section corresponding to the air blowing direction. The formed notches 4a, 4a are fitted together, and each rectifying blade 4,
4 are fitted in a cross shape, and the ends of each of the rectifying vanes 4, 4 are fixed by welding or gluing to the inner surface of the support ring 3.

The above-mentioned blower pipe 2 is formed into a flexible tube shape using a cloth member impregnated with a difficult-to-use synthetic resin, and a wire such as a piano wire is sewn inside in a spiral direction along the circumferential surface, or A ring-shaped wire is sewn at equal intervals to form a tube.

The blow pipe 2 has one end connected to a blower 5 such as a fan or a blower, and the other end connected to a predetermined air supply section (not shown).

The operation of the illustrated embodiment will be described below assuming that it is constructed as described above.

As shown in FIG. 3, when fixing the blow pipe support ring 1 to the discharge side pipe end 2a or the pipe intermediate part 2b of the blow pipe 2 connected to the blower 5, as shown in FIG. After storing the blow pipe support ring 1 inside the blow pipe 2, insert each bolt 6 from the outer circumferential side of the blow pipe 2 into each round hole 3a opened on the circumferential surface of the support ring 3.
... are inserted, and each nut 7 is screwed onto the insertion side end of each bolt 6 to fix the position.

By fixing the blower tube support ring 1 inside the flexible blower tube 2 in this way, the blower air supplied from the blower 5 is rectified by each straightening blade 4, 4, and is blown straight. This eliminates the vibration of the flexible blower pipe 2, and prevents the pipe end 2a from being damaged due to vibration.

Moreover, by fixing the flexible blower tube 2 to the blower tube support ring 1 described above, the blower tube 2 is reinforced, and the blower tube 2 is prevented from deformation such as bending or denting due to stress applied from outside the tube. This can be prevented, and the blower pipe 2 can be supported at a pipe diameter with a predetermined air volume.

As a result, obstacles such as turbulence phenomena and pipe deformation that cause resistance to air blowing are removed, and a constant amount of air can be smoothly blown, and for example, the effectiveness of ventilation or air cooling in the tunnel by air blowing can be maintained.

In addition, as shown in FIG. 5, when connecting another blower tube 8 to the pipe end 2a of the blower tube 2 connected to the blower 5 to extend the air blowing distance, the blower tube connected to the blower 5 The blower tube support ring 1 is stored in the tube end portion 2a of the blower tube 2, and after the tube end portion 8a of the blower tube 8 is fitted onto the tube end portion 2a of the blower tube 2, it is fixed on the outer peripheral surface of this fitted portion. Wrap band 9 and tighten to secure.

The above-mentioned fixing band 9 has upper and lower parts 2 attached to one end.
By inserting the other ends into the D-shaped rings 10 and 11 from the back side, folding back the insertion-side ends, inserting them into the lower D-shaped rings 10 from the front side, and pulling them, the air pipe support ring 1 is Tighten and fix each blower pipe 2, 8.

In this case, the same effects as in the above-mentioned embodiment can be obtained, the connection and removal of each of the blower pipes 2 and 8 can be easily performed, and the above-mentioned fixing band 9 allows
The blow pipe support ring 1 can be easily fixed at any position inside the blow pipe 2.

Note that this invention is not limited to the configuration of the above-described embodiment.

For example, a plurality of straightening blades 4 may be combined in a lattice or installed in parallel inside the support ring 3 constituting the blow pipe support ring 1. It may be fixed inside the air suction pipe 2 connected to the air suction port of the blower 5.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a perspective view of a blow pipe support ring, Fig. 2 is an exploded perspective view of the blow pipe support ring, and Fig. 3 is a side view of the blow pipe showing an example of installation. Figure 4 is an enlarged vertical cross-sectional view of the attachment part shown in Figure 3, Figure 5 is a side view of the air pipe showing another installation example, and Figure 6 is an enlarged longitudinal cross-section of the air pipe connection part shown in Figure 5. It is a diagram. 1... Air pipe support ring, 2... Air pipe, 3...
...Support ring, 4...Blower, 5...Blower, 6
...Bolt, 7...Nut, 8...Air pipe, 9...
...Fixing band, 10, 11...D-shaped ring.

Claims (1)

[Scope of Claim for Utility Model Registration] A support ring made of a hard material and having the same diameter as the inside diameter of the air pipe is fixed inside the flexible air pipe, and a A blow pipe support ring with rectifying blades installed along it to straighten the air.