JPS583786Y2 - Rotary valve for supplying pulverized raw materials - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary pulp that is used as a raw material control valve for inserting and carrying out coarse or fine pulverized raw materials such as chips into a pressurized container.

Conventionally, in this type of rotary valve, a necessary gap s, s' for the rotation of the rotor 4 is provided between the rotor 4 and the case 1, as shown in FIG.

Therefore, high-pressure steam from the input port 2 side enters the end bell spaces io, io' formed between the flange plates 9, 9' and the rotor 4 through the gaps s, s'.

This high-pressure steam serves to keep the pressure in the end bell spaces 10.degree. and 10' at both ends of the rotor 4 in equilibrium and to allow the rotor 4 to rotate smoothly.

However, at the same time that high-pressure steam enters the gaps s and s', dust accompanying the chip also flows into the end bell spaces io and to'.
Get into it.

As a result, the bell space 10.10' becomes clogged with dust, making it impossible for the rotor 40 to rotate smoothly.

Also, since the bell spaces 10 and 10' on both sides are not evenly filled with dust, the air pressure in the end bell spaces 10 and 10' loses equilibrium, causing the rotor 4 to move to the side with lower pressure. Become.

In particular, when the pressure in the bell space 10 of the tapered rotor 4 with the larger diameter increases as shown in FIG. becomes hard, making rotation of the rotor 4 even more difficult.

In order to smoothly rotate the rotor 40, the rotor 4 has been artificially moved in the direction of the larger diameter in the axial direction of the rotor to widen the gaps s and s' to allow dust to circulate.

However, if the frequency of artificially moving the rotor 4 increases in this way, a considerable number of workers will be required.

Furthermore, if the end bell spaces 10, 10' become too clogged with dust, the clogging cannot be removed simply by moving the rotor 4 as described above, and the rotor 4 cannot rotate. You'll have to take it apart and clean it thoroughly.

When the rotor 4 is moved to the larger diameter side, the gaps s and s'
becomes large, making it impossible to seal the high-pressure steam itself.

The present invention aims to solve the problems of the prior art as described above.

Embodiments of the present invention illustrated in the drawings will be described below.

The case 1 has an input port 2 and a discharge port 3 for chips or coarse and fine pulverized raw materials.

The case 1 has a tapered rotor 4, and the rotor 4 has a tapered shape.
A liner 5.5' having a tapered inner surface is fixedly attached to the inner surface of the case 1 in contact with the case 1 in order to reduce the distances s and s' from the case 1.

The rotor 4 is provided with at least one pocket 6 for conveying raw materials separated in the circumferential direction thereof.

The rotor 4 is rotated by the rotor shaft 1 and is slidable on the rotor shaft 1, and chips and the like placed in the pockets 6 are discharged from the discharge port 3 to the outside of the machine.

Several protrusions 8, 8' for scraping off dust are curved on both end surfaces of the rotor 40.

Various shapes of the protrusion 8° 8' can be considered, such as semicircular, trapezoidal, and angular.

Flange plates 9, 9 forming a substantially annular shape with both end surfaces of the rotor 40
End bell spaces io and io' are formed between the end bell spaces io and io'.

A fluid such as steam is sprayed onto the side surfaces of the end bell spaces io and io' onto both sides l or one side of the tapered rotor 40 to maintain its position on the rotor axis 7 neutral. In addition to openings 11 and 11', an exhaust opening 12 and 12' is provided on the lower surface for discharging dust and fluid sprayed from the injection openings 11 and 11'.

As described above, the present invention uses the spacing S as in the conventional case.

The high pressure steam from the input port 2 is sent to the end bell space 1 through S'.
0, 10' and maintains the rotation of the rotor 4 by keeping the pressure balanced, the end bell spaces 10, 1
Fluid is sprayed from the fluid injection port 11.11' at 0' to both end faces of the rotor 40 to equalize the pressure in the bell space 10.10', and by eliminating "clogs", the rotor maintains 40 revolutions. It was designed to do so.

However, the raw material is input from the input port 2 of the pocket 6 of the rotor 4, rotates toward the discharge port 3, and is discharged outside the machine, so the steam pressure becomes reduced at the discharge port 3, and the end bell space 10. Also at 10', steam is constantly flowing in the direction of the discharge port 3.

As a result, dust enters the gaps s and s' from the inlet 2, although it is very less than in the past, and the dust enters the bell space 10.10'.
and adheres to the 9° and 9' surfaces of the flange plate.

The dust attached to the 7-lunge plates 9, 9' is removed from the protrusion 8.
．． Scrape off by turning 8'.

In this way, the bell spaces io, io' are prevented from being clogged with dust, and the dust is removed from the exhaust ports 12, 12'.

Furthermore, if the pressure balance between the bell spaces 10 and 10' is broken, and for example the pressure in the bell space 10' on the small diameter side increases, the rotor 4 will move to the large diameter side and the high pressure steam seal will be broken. .

At this time, the supply of steam from the injection port 11' of the bell space 10' on the small diameter side is temporarily stopped, the pressure in the bell space 10' is reduced, and the rotor 4 is moved to the small diameter side and brought to a neutral position. If you return it, you can maintain the high-pressure steam seal.

At this time, the pressure imbalance in the bell spaces 10 and 10' is caused by clogging of the bell spaces io and io' with dust, so the change in the current value for operating the rotary valve is measured. Then, when the current value exceeds a certain value, the ejection of steam from one of the injection ports 11 and 11' is automatically stopped.

The dust collected in the lower part of the bell spaces 10, 10' as described above is discharged from the machine together with steam through the exhaust ports 12, 12' installed below the end bell spaces io, io'. Discharge.

・The functions and effects of this invention can be summarized as follows.

■ In order to hold the tapered rotor 4 in a neutral position on the rotor shaft 7, fluid such as steam is ejected into the bell space 10t10', so that dust leakage from the gaps s and s' is minimized. It can be prevented.

■ Despite the above-mentioned sealing of the ejected steam, the leaked dust is absorbed by the steam into the exhaust ports 12 and 1 before it becomes a lump.
Excluded from 2'.

Further, even if the dust is removed before it becomes a lump, a part of it will inevitably stick to the seven lunge plates 9, 9' and become a lump.

When this lump grows to a certain extent, the protrusion 8.8' scrapes off the lump, and the dust is removed from the bell space 10, 10'.
There will be no confusion.

■ Since the protrusions 8 and 8' are integrally provided on both end faces of the tapered rotor 4, they are constantly rotated on the flange plate 9° and 9' surface, and are automatically rotated without any special operation. The dust is scraped off.

[Brief explanation of drawings]

Fig. 1: A sectional view of a conventional rotary valve, Fig. 2: A sectional view of a rotary valve of the present invention, and Fig. 3: A perspective view of a rotor. 1... Case 2... Inlet, 3...
...Discharge port, 4...Rotor, 5,5'--
...Liner, 6...Pocket, T...
...Rotation axis, 8.8 (...Protrusion, 9,9'...
...7 lunge plate, 1o, 1o<...end bell space, 11.11! ...Injection port, 12t12'
...exhaust port, S, S/...gap.

Claims (1)

[Scope of Claim for Utility Model Registration] A tapered case 1 having an input port 2, a discharge port 3, and seven flange plates 9°9' at both ends, and a rotor shaft 7 within the case 1 that is slidably suspended. It has a tapered rotor 4,
Bell spaces io and io' are formed between the tapered rotor 4 and the 7 flange plates 9 and 9', and the pocket 6 of the rotor 4 receives the pulverized raw material from the input port 2, and the pulverized raw material is In the rotary pulp discharged into the discharge port 3, protrusions 8, 8' for scraping off dust are provided on both end surfaces of the tapered rotor 4 to protrude toward the 7 flange plates 9, 9'. 9' is provided with injection ports 11.11' for spraying fluid such as steam into the bell spaces 10 and 10', and by relatively adjusting the amount of fluid ejected from the injection ports 11.11' on both sides. The rotor 4 is maintained at a neutral position on the rotor axis 7 line, and the bell space 10
．． A rotary pulp for supplying pulverized raw material, characterized in that exhaust ports 12 and 12' are provided at 10' for removing dust as well as fluid such as steam.