JPH0396792A - Drift forming device of drifting pipe curved part - Google Patents

Abstract

PURPOSE:To precisely form a drift of drifted material by providing a drift forming device of a drifting pipe curved part having a plurality of plate bodies having different lengths provided therein at the corner of the drift pipe. CONSTITUTION:A box drift forming device 6 is provided at the right-angled corner 1 of a drifting pipe 7 having a circular section. The drift forming device 6 is formed of a plurality of plate bodies having different lengths and one bedplate body 4. An aerial line B connecting the side ends of the plate bodies 2 continuously contacts the recessed surface 5 of the bedplate body 4, and maintains the form of the drifted accumulation in curved-face form. Consequently, deterioration of quality of a drifted material by collision to the pipe wall can be remarkably reduced while smooth drifting speed in the drifting pipe curved part.

Description

DETAILED DESCRIPTION OF THE INVENTION (AL Industrial Field of Application) This invention is aimed at preventing the blown material from being damaged or crushed during blowing in a blowing pipe that blows and transports wood chips, grains, etc. using wind pressure. The present invention relates to a device for forming a blowhole at a bend in a blow pipe.

(b) Prior Art The bending angle of a conventional blowing pipe was such that the inner surface of the pipe wall was formed smoothly.

tc) Problem to be solved by the invention Although the smooth inner surface of the curved part prevents the insufflated material from stagnation and is convenient for high-speed insufflation, on the other hand, a part of the insufflated material collides with the pipe wall of the curved part. There was a serious flaw in that it had to be crushed.

For example, in the case of wood chips, the diameter between the chip dumper attached to the truck and the chip yard in the open storage area is 1.5 mm.
It is connected by a ~2m steel pipe pipeline,
The chipyard is then connected to the paper mill by a conveyor belt. However, this pipeline is not a straight line at any factory, and there are several curves of approximately 30 to 90 degrees along the way. As the chips collide with the curved tube wall, they are inevitably damaged to a greater or lesser extent, and several percent of the chips become waste powder that cannot be used as a raw material for paper pulp.

The inventor of this invention believes that by inserting a cushion near the bend in the iron pipe, where chips collide violently with loud noises that cannot be heard, damage can be reduced. I thought it was supposed to be.

The problem to be solved by this invention is how to provide an effective damping means at the bend of the blow pipe.

fd) Means for Solving the Problem The inventor made a model of an insufflation pipe using a transparent acrylic pipe and repeatedly experimented with various buffering means using Styrofoam particles, beans, wheat, wood chips, etc. As a result, they discovered, quite surprisingly, that the snowdrifts, which had previously been seen as a negative factor, were actually the best cushion. In other words, rather than attaching a special cushioning material to the inside of the pipe wall at the curved part, the airflow can be achieved by forming a snowdrift with the same shape and material as wood chips and grains, respectively. They were able to complete this invention by confirming through experiments that it was not only extremely effective in preventing damage to objects, but also did not impair smooth blowing speed.

The blowhole-shaped blowpipe bending device according to the present invention solves the above-mentioned problems, and has the following features. That is, a plurality of plate-like bodies (2) of different lengths are installed inside the bending angle +1) of the blowing pipe.

The shape, length and thickness of the plate (2), installation angle and spacing,
The number and the like are appropriately selected depending on the type of insufflation material, the cross-sectional shape of the insufflation pipe, the radius of curvature of the bending corner, and the like. The material of the plate-shaped body (2) is also arbitrary, such as metal, reinforced plastic, ceramics, stone, wood, etc., and the surface treatment, color, pattern, etc. are not particularly limited. In addition, in a snowdrift forming device (6) formed by arranging a plurality of plate-like bodies (2) at appropriate intervals, a part of the plate-like bodies {2} is formed into a platform (4).
} may be replaced.

+81 Effect A blowhole type device for a blow pipe bending portion according to this invention (6)
When using this, as shown in FIG. 2, the leading part of the insufflated material blown from the direction of A accumulates in the gaps between the plate-like bodies (2) which are successively arranged at appropriate intervals.

This forms a stable snowdrift and acts as a soft cushion. Therefore, the subsequent blowing object that reaches the corner does not collide with the pipe wall and is spared damage. Moreover, very conveniently, the blown material that hits the snowdrift rolls on the edge (3) of the plate-shaped body (2) and the concave surface of the imaginary gland B, in which the snowball is formed, and immediately follows a straight course C. can be moved to.

That is, the plurality of plate-shaped bodies (2) inserted into the bending corner (1) of the insufflation pipe function to solve the above-mentioned problem.

(f+Example Example 1 Example 1 of this invention is shown in Figure t, Figure 2, Figure 3, Figure 4).
This will be explained based on Fig. 5. Figure 1 shows Example 1
FIG. (7) is a blow pipe with a circular cross section, and a box-shaped blowhole forming device (6) is provided at a right-angled bend (1).

FIG. 2 is a perspective view showing the interior of FIG. 1.

A plurality of plate-like bodies (2) with different lengths and one platform-like body (4
) constitutes a snowdrop-shaped device (6). The overhead wire B connecting the side edges of the plate-shaped body (2) is connected to the concave surface (
5) to maintain the shape of the accumulated sediment in a curved surface.

FIG. 3 is a plan view of FIG. 2. The plate-like bodies (2) are arranged at appropriate intervals so that the overhead line B formed by the plate-like bodies (2) and the snowdrift draws a curve.

FIG. 4 is a plan view of the plate-shaped body (2) used in Example 1. Each rectangular plate-like body {2} has a different length, and each side edge (3) is recessed into a U-shape.

FIG. 5 is a perspective view of the platform (4) used in Example 1. It is provided with a smooth recess (5) to assist in the smooth movement of the bark.

(g) Example 2 Example 2 of the present invention will be described based on FIGS. 6, 7, and 8.

FIG. 6 is a plan view showing the second embodiment. In Embodiment 2, a blowhole forming device (6) is installed inside the corner (1) of a blowpipe (7) having a circular cross section. In order to eliminate passage obstruction due to the formation of snowdrifts, the tlII slope angle +1
) has a bulge. This Example 2 also applies to Example 1.
Similarly, a snowdrift forming device is composed of a plurality of plate-like bodies (2) of different lengths and one platform-like body (4), and the imaginary McB on which the blowing material collides and rolls is The same will be maintained.

FIG. 7 is a plan view of the plate-shaped body (2) used in Example 2. The plate-shaped bodies (2) each having a different length are connected to the insufflation pipe (
Because it is installed inside the corner (1) of 7), and because the edges are recessed in a U-shape, the overall shape is half-moon-like.

FIG. 8 is a perspective view of the platform (4) used in Example 2. It is equipped with four smooth parts (5) to assist the smooth movement of the insufflation material.

(11) Effects of the Invention The insufflation pipe bending part forming device in the form of a blowhole according to the present invention can reliably form a blowhole of the insufflation material at the four corners of the blowpipe.

Since the blowhole exerts a buffering effect, the blowing object that collides with it will not be damaged or shattered into pieces.

In addition, since it is pushed by the wind pressure and moves while rolling on top of the snowdrift, there is no chance that the blown material will get stuck in one exit corner.

Therefore, while ensuring a smooth blowing speed in the auxiliary part of the blowing pipe as before, it is possible to significantly reduce quality deterioration of the blowing material due to collision with the pipe wall.

[Brief explanation of drawings]

FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5 are a perspective view and a plan view, respectively, showing Embodiment 1 of the present invention. 6th
7 and 8 are a plan view and a perspective view showing the second embodiment.

Claims (1)

[Claims] 1. A device for forming a blowhole at a bent part of an insufflation pipe, in which a plurality of plate-like bodies (2) of different lengths are installed inside the bend (1) of the insufflation pipe.