JPS60197524A - Rotary valve for feeding powdery material - Google Patents

Abstract

PURPOSE:To prevent an influence from being exercised on powdery material feeding action by discharged gas and to enable smooth feed of quantities of powder materials, by a method wherein a passage for introduction of a powdery material is formed separately from a passage for discharge of gas. CONSTITUTION:A powdery material 80 is fed through a hopper 72 in the direction of an arrow mark T as a rotor 52 is rotated. The powdery material 80 is dropped in a case 50 under gravity, and is contained in chambers, divided by vanes 54, once. Since the vanes 54 are rotated togetherwith the rotor 52, the powdry material 80 is dropped, as shown by an arrow mark U, in a pressure tank 76 with the rotation of the rotor. Pressure gas, of which a chamber on the tank 76 side is full, is forced into contact with a gas discharge room 62 with the rotation of the rotor 52, and is discharged through a discharge hole 64. In which case, the powdery material 80 is dropped in a spot about right below an introduction 58. Even in case the powdery material is temporarily accumulated in a chamber formed with the vane plates 54, the shape of such accumulation maintains an angle of repose, and thereby the powdery material 80 is prevented from enterance and accumulation in the gas discharge room 62. This causes discharge gas to be discharged to the outside through the discharge room 62 and a discharge hole 64.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotary pulp for supplying powder, which is used when supplying powder to pressure piping, etc. across a pressure tank.

[Background technology]

A conventional rotary valve of this type is shown in FIG. In this figure, a rotor 12 is rotatably installed on the central axis of a hollow cylindrical case 10. A vane plate 14 that rotates inside the case 10 together with the vane plate 12. ..., 14 are attached. Further, a powder inlet 16, which is an opening penetrating into the case 10 from the outer periphery, is provided in the upper part of the case 10, and a similar powder outlet 18 is provided in the lower part.

In order to supply the powder 30 to the pressure tank 20 etc. using this type of rotary valve, there are 18 discharge ports in the pressure tank 20, etc.
The inlet 16 is connected to the powder supply port 22 of the hopper 24 . Hopper 24 used in this case
The vicinity of the connection part is formed in a double structure, and the powder 30
is introduced into the case 10 of the rotary valve from the inner cylinder 26, and the pressurized gas is discharged to the outside from the outer cylinder 28. That is, when the powder 30 is supplied in the direction of the arrow Q in the figure while rotating the rotor 12 in the direction of the arrow P in the figure, the powder 30 is temporarily accommodated in each chamber divided by the vanes 14, and the rotation of the rotor 12 As time passes, the liquid drops and is supplied into the pressure tank 20 as shown by the arrows. At this time, the pressure difference between the pressure inside the pressure tank 20 and the pressure of the outside air is maintained by the vanes 14°..., 14. However, the room in contact with the pressure tank 20 is filled with pressurized gas, and as it rotates, it reaches the inlet 16, and when it comes into contact with outside air, the gas expands due to the pressure difference and excess gas is released. In this case, since the inner cylinder 26 is filled with powder 30, the outer cylinder 28? ]l- is discharged to the outside through.

In such conventional rotary pulp, the outer cylinder 2
As the amount of gas released to the outside through the tube 8 increases, the powder 30 is blown up to the top and the supply efficiency decreases.
The space between the container and the outer cylinder 28 may become full, making it impossible to supply the liquid. Therefore, it is necessary to keep the released gas below a predetermined value. On the other hand, since the amount of released gas depends on the pressure value of the pressure tank 2° and the rotation speed of the rotor 12, the pressure of the pressure tank 20 and the rotation speed of the rotor 12 must be kept below a certain value. For example, when the pressure in the pressure tank 20 is high, the rotation speed must be reduced, and conversely, when trying to increase the supply amount, the pressure tank 20
pressure must be reduced. A decrease in the rotation speed of the rotor 12 means a decrease in the amount of powder supplied, and the pressure tank 20
The requirement for pressure reduction in this type of rotary pulp significantly narrows the range of applications for this type of rotary pulp. Therefore, in the conventional rotary pulp of this type, it was not possible to increase the amount of powder supplied above a certain value, and there was a risk that supply could not be achieved due to pressure fluctuations or other factors.

[Purpose of the invention]

The present invention takes the above facts into account and eliminates the above disadvantages by making the flow path for the discharged gas and the powder path separate, thereby making it possible to supply a large amount of powder and at the same time making it impossible to supply the powder. The purpose is to provide rotary pulp for powder feeding without any danger.

[Structure of the invention]

The rotary pulp for powder supply according to the present invention includes a hollow cylindrical case, a rotor rotatably installed on the central axis within the case, and a plurality of rotary rotors attached to the rotor. A vane plate divided into two chambers and rotatable within the case, a powder inlet provided at the top of the case and penetrating from the outer circumference to the inner circumference of the case, and a powder inlet provided at the bottom of the case. A powder discharge port penetrating from the outer periphery to the inner periphery of the case, and a gas discharge port penetrating from the outer periphery to the inner periphery of the case, and a By separating the gas discharge passage and the powder supply passage, it is possible to supply a large amount of powder and there is no danger of supply failure.

[Embodiments of the invention]

FIG. 2 shows an embodiment of the rotary pulp for supplying powder according to the present invention. In this embodiment, a rotor 52 is rotatably installed on the central axis inside a hollow cylindrical case 50, and the inside of the case 50 is divided into a plurality of chambers in the radial direction of the rotor 52.
Four blade plates 54 rotating inside. ..., 54 are attached.

Further, a powder introduction port 56 that opens from the inner circumference of the cooler 250 to the outside is bored in the upper part of the case 50.
A powder introduction pipe 58 is erected upward, and a flange portion 6o is formed at its upper end. Further, on both sides of the introduction pipe 58, gas release rooms 62°62 are provided, the openings of which are in contact with the inside of the case 50.
2 is provided with gas discharge holes 64 and 64 that communicate with the outside. Further, the lower part of the case 50 is provided with the case 50.
0 inside □ A powder discharge port 66 that opens from the periphery to the outside is drilled, and a powder discharge pipe 68 is erected downward from the discharge port 66, and a 7-rank part 70 is provided at the tip of the powder discharge port 66.
is formed. This 7-rank section 60 is connected to a 7-rank section 74 of a hopper 72 for supplying the powder 80, and the 7-rank section 70 of the discharge conduit 68 is connected to a 7272 section 78 of a pressure tank 76 to which the powder is supplied. It is something that is joined.

Next, the operation of this embodiment will be explained. Powder 80 is supplied from the hopper 72 in the direction of arrow T while the rotor 52 is rotated in the direction of arrow S in FIG. The powder 80 falls into the case 50 due to gravity, and is temporarily accommodated in each chamber divided by the wing plate 54. Since the vane plate 54 rotates together with the rotor 52, the powder 80 sequentially falls into the pressure tank 76 as shown by arrow U in the figure as the vane plate 54 rotates. In this case, the pressure difference between the pressure inside the pressure tank 76 and the pressure of the outside air is determined by the pressure difference between the pressure inside the pressure tank 76 and the pressure of the outside air. ..., maintained by 54.

Further, the pressurized gas filling the chamber of the pressure tank 76@ comes into contact with the gas release room 62 as the rotor 52 rotates, and is released to the outside from the release hole 64. At that time, powder 80
falls almost directly below the introduction pipe 58, and the blade plate 54. ...
, 54, the shape of the deposit maintains the angle of repose, so there is no risk of the powder 80 entering and depositing in the gas release room 62.

Therefore, the released gas is transferred to the release room 62 and the release hole 64.
The powder 80 is smoothly discharged to the outside through the pump, and the powder 80 is not blown up to reduce its supply efficiency or become unable to be supplied.

In the above embodiment, the gas discharge ports 64 are provided on both sides of the powder introduction pipe 58, but they are provided, for example, in front of the particle introduction pipe 58, that is, at a distance toward the rotation direction of the rotor 52. It is also possible to provide them completely separately. In this case, compared to the above embodiment, the pressure tank 76
This reduces the number of vanes 54 inserted between the air and the outside air, which is disadvantageous from the viewpoint of maintaining pressure difference, but since the powder inlet 56 and the gas outlet 64 are completely separate, the gas It is possible to completely block out the influence of the discharge on the powder supply, which is advantageous when supplying a very large amount of powder.

〔Effect of the invention〕

As explained above, in the rotary pulp for powder supply according to the present invention, by separating the powder introduction passage and the gas discharge passage, the influence of the discharged gas on the powder supply action is eliminated, and the powder It is possible to smoothly supply a large amount of powder without the risk of supply failure.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional rotary pulp for supplying powder, Fig. 2 is a vertical cross-sectional view showing a preferred embodiment of the present invention, and Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 2. FIG. 50... Case, 52... Rotor, 54... Vane plate 56... Powder introduction port, 66... Powder discharge port, 6
2...Gas release room, 64...Gas release application Hitachi Plan Shi Construction Co., Ltd. Figure 1 3゜Figure 2 mw! ■'' Figure 3

Claims (1)

[Claims] A hollow cylindrical case, a powder discharge port rotatable into the case and opening downward from the case, and a gas discharge port provided near the powder introduction port and formed separately from the introduction port. A rotary pulp for supplying powder, comprising: and ′.