JPS6326345Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a powder and gas mixture distribution duct, more specifically, a powder and gas mixture distribution duct that is installed in the distribution duct to allow a powder and gas mixture to flow at a substantially uniform concentration. This invention relates to a completely new non-uniform flow block that separates a flow part with a higher concentration and a flow part with a lower powder concentration, or makes a mixture flow with an originally non-uniform powder concentration uniform. It is something.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the drifting block itself installed in a powder and gas mixture distribution duct according to the invention, this drifting block 1 having a longitudinally elongated cross section with respect to the flow 2 of the powder and gas mixture. It has a sufficient thickness (wear allowance) t in the direction of mixture flow. Therefore, the deflection block 1 has a sufficient wear allowance, so it can be used for a sufficiently long time even though it is worn by the powder in the mixture flow 2, and it does not need to be made of expensive wear-resistant materials. Nor.

FIG. 2 shows an example in which the biased flow block 1 shown in FIG. 1 is installed in the powder and gas mixture distribution duct 3. It is set up so that it gradually becomes narrower and more limited. Therefore, the mixture flow 2 whose flow is blocked by the deflection block 1 is forcibly guided to one side (left side) as shown by the arrow, thereby making the powder concentration in the flow path 4a higher than that in the flow path 4b. can do.

However, if the deflection block 1 shown in FIG. 1 is simply installed in the mixture flow 2 as shown in FIG. The flow is not completely guided to one side of the flow path as shown in Figure 3, but there is a considerable amount of flow out of the plane of the deflection block 1, as shown in Figure 3. Unachievable.

Therefore, in the present invention, as an example shown in FIG. 4, guides 5 are provided on both sides of the deflection block 1 to extend upstream of the mixture flow 2. By providing such a pair of guides 5 on both sides of the deflection block 1, the mixture flow 2 flows as shown by the arrow in FIG. It can be prevented.

In this case, the powder, which has a higher density than the gas, is drifted upstream of the guide 5 at a smaller rate than the gas due to inertia. Therefore, in FIG. 4, the mixture flow inside the guide 5 has a high concentration of powder, but the concentration of powder outside the guide 5 is low. By guiding the mixture to the flow path 4a shown in FIG. 2, the powder concentration of the mixture flow flowing through this flow path 4a is increased.

As mentioned above, by using a deflection block having a guide as shown in FIG. 4, the flow of a mixture of powder and gas can be divided into a flow part with a higher concentration of powder and a flow part with a lower concentration of powder. It is possible to effectively separate the powders from each other, or to make a mixture flow, which originally has a non-uniform powder concentration, to a uniform powder concentration.

In addition, as mentioned above, this drift block
Since it has a longitudinal cross section with respect to the mixture flow,
It can provide a sufficient amount of wear allowance against wear and can therefore withstand long-term use, and is particularly effective against highly abrasive powders. Furthermore, there is no need to create drift blocks using expensive wear-resistant materials.
Moreover, it has the advantage that it has a simple structure and that a deflection block can be installed without bending the flow path of the mixture flow.

FIG. 5 shows an example in which a large number of drifting blocks 1 are installed in parallel in a powder and gas mixture distribution duct 3 at intervals in the width direction of the duct according to the present invention, and the drifting blocks 1 on both sides are It has a guide 5 only on one side. Therefore, in FIG. 5, by changing the ratio of the width dimension a of the drifting block 1 to the dimension b between the blocks, the guide 5
By changing the ratio of the protruding dimension c from the block, the drifting effect can be changed.

FIG. 6 similarly shows an example in which a large number of drifting blocks 1 are installed in one stage in a distribution duct 13 having a rectangular cross section.

FIG. 7 shows an example in which a large number of drifting blocks 1 are installed in two stages in a distribution duct 13 with a rectangular cross section, and the large number of drifting blocks 1 in each stage are arranged alternately with respect to the mixture flow 2. .

FIG. 8 shows two examples in which a large number of drifting blocks 1 are installed in a circulation duct 23 having a circular cross section.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the deflection block itself installed in a powder and gas mixture distribution duct according to the present invention, and Figs. 2 and 3 show the action of the deflection block itself shown in Fig. 1. side view and front view,
Fig. 4 is a front view showing the action of a deflection block having guides on both sides, and Fig. 5 shows a large number of deflection blocks according to the present invention placed in a powder and gas mixture distribution duct at intervals in the width direction of the duct. Fig. 6 shows an example in which a large number of drifting ducts are installed in a single stage in a distribution duct with a rectangular cross section, a is a front view, and b is a B- of a. Fig. 7 shows an example in which a large number of drifting ducts are installed in two stages in a distribution duct with a rectangular cross section; Front view, b is a side sectional view taken along line B-B of a, c is a bottom view taken along line C-C of b, d is a bottom view taken along line D-D of b, a and b in Figure 8. These are bottom views showing two examples in which a large number of drifting blocks are installed in a circulation duct having a circular cross section, taken along a right-angled cross section of the duct. 1...Difference flow block, 2...Flow of powder and gas mixture, 5...Guide.

Claims (1)

[Scope of utility model registration request] During the flow of a mixture of powder and gas, a large number of deflection blocks are installed in parallel at intervals in the width direction of the distribution duct to narrow the flow path of the mixture flow from upstream to downstream. A powder and gas mixture distribution duct characterized in that each deflection block has a vertically elongated cross section with respect to the mixture flow, and has a pair of guides on both sides thereof extending upstream of the mixture flow.