JPS6218949Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary dryer with an improved sealing mechanism at the outlet and inlet of the dryer body.

Conventional rotary dryers have the outlet or inlet provided at both ends of the dryer body sealed with various sealing mechanisms, but all of them have insufficient sealing performance, and in some cases, the This has caused problems such as leaking toxic gases to the outside, or conversely allowing oxygen to enter the dryer body from the outside, reducing the quality of the product.

The purpose of the present invention is to solve such problems, and the present invention has a pair of discs that rotate together with the dryer body, sandwiching the outlets or inlets provided at both ends of the dryer body that rotates around the axis. A cylindrical chute case, which is provided at right angles to the axis of the main body and has a chute corresponding to the outlet or inlet of the dryer main body, is provided on the fixed side so as to cover the pair of discs, and the chute case is slidably connected to the discs. This objective is achieved by providing a rotary dryer with a structure in which a seal is inserted between the contact parts, thereby ensuring a seal between the internal pressure and external pressure of the dryer body. .

The configuration of the present invention will be explained in detail below based on the drawings showing one embodiment thereof.

In FIGS. 1 and 2, 1 is a dryer main body that is rotated around two shafts, and 3 is a product discharge shell that is protruded from the end of the dryer main body 1. Discs 5 are spaced apart and opposed to each other on the provided flange 4, and communication pipes 1 pass through the flanges 4 and the discs 5 at equal intervals in the circumferential direction in two directions of the axis of the dryer body.
3 are connected. Thereby, a product outlet 6 is formed at the end of the product discharge shell 3. Reference numeral 7 denotes a heat insulating material provided on the outer periphery of the peripheral wall of the product discharge shell 3, and the heat insulating material 7 is sandwiched between the end surface of the dryer main body 1 and the ring-shaped plate 4. 8,9
are a pair of discs provided perpendicularly to the axis 2 of the dryer main body 1 so as to sandwich the product outlet 6 of the discharge shell 3; one disc 8 is formed in a ring plate shape and is connected to the outer periphery of the product discharge shell 3; The other disc 9 is located at a distance from and opposite to the disc 5 of the product discharge shell 3. Both discs 8 and 9 are each attached to an outer cylinder 10 provided on the outside of the product discharge shell 3 with the product outlet fixed therethrough. Therefore, the dryer main body 1, product discharge shell 3, outer cylinder 10, and pair of disks 8, 9 rotate as one. 11 is the product discharge shell 3 and the outer cylinder 1
Gas supply ports 14 are provided at two locations on the axis of one disk 9 to supply cooling or heating gas to the space 12 formed between the space 12 and the cooling or heating gas provided to the space 12. A suitable number of gas exhaust ports 15 are provided in the vicinity of the dryer main body 1 of the outer cylinder 10 to guide the operating gas to the outside. This is an expansion agent inserted at a suitable location between the disks 8 and 9 on the peripheral wall of the cylinder 10.

Reference numeral 16 denotes a cylindrical chute case that covers the pair of discs 8 and 9, and has a chute 17 at its lower end that corresponds to the product outlet 6, and is fixed to a fixed body (not shown) outside the dryer main body 1. It is suspended and fixed via a metal fitting 18. 19 is this fixed chute case 16, a pair of rotating discs 8,
A sealing mechanism provided at the sliding contact portion with the dryer body 9 serves to seal the internal pressure and external pressure of the dryer body 1. Reference numeral 20 denotes a telescoping mechanism provided at one end of the chute case 16 in the two axial directions, and serves to absorb expansion and contraction of the dryer main body 1 in the two axial directions.

Figure 3 shows an enlarged view of the main parts. Seal mechanism 19
A ring-shaped seat packing 21 is provided on the outer periphery of both discs 8 and 9, and a chute case 16 is provided on one side of the ring-shaped seat packing 21.
The ring-shaped gaskets 22 provided on both sides of the periphery are brought into contact with each other, and the other side of the ring-shaped sheet gasket 21 is pressed by presser rollers 23 provided at appropriate locations on both side peripheries of the chute case 16 so that the ring-shaped gasket 22 side is always pressed. It is configured to be biased with a constant surface pressure. On the other hand, the telescopic mechanism 20 has a flexible joint 2 at one end of the peripheral wall of the shoot case 16.
4 is interposed therebetween, and the width of this flexible joint 24 is adjusted with an adjustment bolt 25.

FIG. 4 shows an enlarged view of the ring-shaped packing 22.
As shown in the figure, the ring-shaped packing 22 is constructed by combining two inner and outer packing rings 22A and 22B, into which grease is injected from a grease cup 26 for the purpose of sealing and lubricity. In addition, in the figure, grease cup 2
6 is shown, but a grease pump may also be used.

The operation of this configuration will be explained next. When the dryer main body 1 is rotated around the axis 2, the product discharge shell 3, the outer cylinder 10, a pair of disks 8,
9 etc. rotate integrally, while the chute case 1
6 will be held fixed. The product dried in the dryer main body 1 is fed into a product discharge shell 3 and dropped from a product outlet 6. It is then led to the next facility through the chute 17. During these operations, the pressure inside the dryer main body 1 and the pressure in the space 27 between the outer cylinder 10 and the chute case 16 are kept equal through the product outlet 6, but the internal pressure and external pressure in this space 27 are separated by a seal. Mechanism 19 ensures reliable sealing. Even if the dryer main body 1 expands or contracts due to heat, the expansion/contraction mechanism 20 and the expansion joint 15 absorb the expansion/contraction. On the other hand, during these operations, if the dryer body 1 is a high-temperature kiln (500°C or higher), the gas supply port 1
Cooling air or cooling gas is supplied from 1 into the space 12. Then, the space 27 and the inside of the dryer main body 1 will be insulated by the heat insulating material 7 and the cooling space 12, making it possible to maintain the sealing mechanism 19 at a temperature of, for example, 100° C. or lower. This makes it possible to use a normal packing material for the ring-shaped packing 22. In addition, space 1
The inside of the dryer 2 maintains a pressure that is separate from the dryer main body 1 and external pressure.

In the above embodiment, the product outlet side of the rotary dryer has been described as an example, but the product inlet side may also have the same symmetrical configuration.

As described above, according to the present invention, it is possible to reliably seal the internal pressure and external pressure of the dryer main body. Therefore, it is no longer possible to eliminate the problems that occur in the past, such as high-temperature gas or toxic gas inside the dryer body leaking to the outside, or oxygen entering the dryer body, which deteriorates the quality of the product. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical cross-sectional side view of the product outlet side of the rotary dryer according to the present invention, FIG. 2 is a sectional view of FIG. 1, and the left half is A of FIG. 1. -A sectional view, right half is B-B in Figure 1
3 is an enlarged view of the main part of FIG. 1, and FIGS. 4a and 4b are a sectional view and a front view of the ring-shaped packing. DESCRIPTION OF SYMBOLS 1... Dryer main body, 2... Shaft core, 6... Manufacturing outlet, 8, 9... Pair of disks, 16... Cylindrical chute case, 17... Chute, 19... Seal mechanism, 20... Telescopic mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of discs that rotate together with the dryer body across the outlets or inlets provided at both ends of the dryer body that rotates around the axis, are arranged at right angles to the axis of the dryer body. A cylindrical chute case having a chute corresponding to the outlet or inlet of the dryer main body is provided on the fixed side so as to cover the pair of discs, and a packing is provided at the sliding contact portion of the chute case with the discs. A rotary dryer characterized by the fact that it is equipped with 2. The rotary dryer according to claim 1 of the utility model registration, characterized in that an expansion joint for absorbing thermal expansion in the axial direction of the dryer body is interposed at an appropriate location in the axial direction of the cylindrical chute case.