JPS61268299A - Drum type dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a drum dryer in which a fan-shaped casing is disposed behind the drum.

[Technical Background of the Invention] In recent years, drum dryers have been equipped with a flat, rear-open casing of approximately the same diameter as the drum at the rear of the drum, and a device for sucking hot air inside the drum into the casing. A configuration in which a fan is rotatably provided is provided. An example of this will be explained in detail with reference to FIG. 4. 1 is an outer box, 2 is a drum, and 3 is a casing disposed behind the drum 2. The casing 3 has approximately the same diameter as the drum 2, has an open rear surface, and is fixed to a support plate 4. The support plate 4 is fixed to the rear surface of the outer box 1 in a horizontally extending state, and a pivot shaft 6 is rotatably provided in the center via a bearing 5. The tip of the pivot 6 extends forward through the casing 3 and is fixed to the center of the rear surface of the drum 2, thereby rotatably supporting the rear of the drum 2. Further, a fan 7 which also serves as a heat exchanger is rotatably disposed within the casing 3. This includes a large number of circulation fins 8a on both the front and rear surfaces of the rotating board 8.
and cooling fins 8b radially protruding,
It is rotated by a motor (not shown) via a belt 9, thereby circulating hot air within the drum 2, and drawing outside air into the casing 3 to exchange heat with the warm air via the rotating base plate 8.

[Problems with the Background Art] However, with the above configuration, if it becomes necessary to repair or inspect the fan 7 (for example), the back plate 1a of the outer box 1 is removed and the support plate 4 is positioned so that it hides the fan 7. Therefore, it is sometimes necessary to remove this support plate 4 from the outer box 1 and disassemble it, and since this support plate 4 supports the load of the drum 2, etc., the fan 7 needs to be repaired and inspected. But it's extremely troublesome. Furthermore, since the belt 9 for driving the fan 7 is located between the fan 7 and the support plate 4, when assembling the belt 9, the support plate 4 is first stretched over the outer box 1 with the belt 9 stretched properly. It has the disadvantage that it has to be fixed in place, making it difficult to assemble.

[Object of the Invention] An object of the present invention is to provide a drum dryer that can improve both repair and inspection workability and assembly workability.

[Summary of the Invention] The present invention fixes the casing to the outer box by a support plate integrally provided on the outer periphery of the casing, and also provides a pivot shaft for pivoting the fan on the casing, which is hidden by the support plate. The unique feature is that the fan is exposed at the rear of the casing.

[Embodiments of the invention] This will be explained with reference to FIGS. 1 to 3.

11 is an outer box, and 12 is a drum. Front panel 1 of outer box 11
3 has a cylindrical support tube portion 14 that protrudes rearward.
A short cylindrical portion 12a on the front surface of the drum 12 is rotatably fitted and supported on the outer periphery of the support cylindrical portion 14 via a bearing member 15. The inside of the support cylinder part 14 of the front plate 13 constitutes an entrance/exit for the material to be dried, and can be opened and closed by l1m16 rotatably supported by the front plate 13.

Reference numeral 17 denotes a casing located at the rear of the drum 12, which is in the shape of a flat container with approximately the same diameter as the drum 12, with an open rear surface and an annular cylindrical portion 17a formed near the outer periphery of the front surface. . As shown in FIG. 2, a pair of support plate portions 18 are integrally provided on both left and right sides of the outer peripheral portion of the rear surface of the casing 17 and protrude toward both left and right sides of the rear surface of the outer box 1. is screwed to the rear flange portion 11a of the outer box 1. As a result, the casing 17 is fixed within the outer box 11, and the short cylindrical portion 12b with a large diameter protruding backward from the rear surface of the drum 12 is connected to the cylindrical portion 17af of the casing 17 via one bearing member. By being fitted, the rear part of the drum 12 is rotatably supported by the casing 17. 20 is a pivot fixed to the front center of the casing 17, and 21 is attached to the casing 17 together with this pivot 20.
A plurality of air intake ports 22 are intermittently formed in an annular area surrounding the mounting cylinder 21 of the casing 17, and a filter is installed so as to cover the air intake ports 22. 23 is removably attached to the cylinder 21. 24 is a fan that is placed inside the casing 17 and also serves as a heat exchanger, for example. A cylindrical pulley portion 28 is integrally formed in the center of the rotary base plate 25.The central boss portion 24a of the 7-inch 24 is The stop ring 3 is rotatably provided on the pivot shaft 20 via a bearing 29.
With 0, extraction is stopped. Inside the casing 17 is a circular opening 31 whose diameter is slightly larger than the outer diameter of the fan 24.
A partition plate 31 having a diameter a is provided, and the inside of the casing 17 is divided into front and rear parts along with the rotating board 25 of the fan 24. Reference numeral 32 denotes a sealing member that seals between the outer circumference of the rotary substrate 25 and the inner circumference of the circular opening 31a of the partition plate 31. 33 is a heater support case, which has a heater 34 inside and is attached to the inner lower part of the casing 17;
Correspondingly, the casing 17 has a large number of hot air discharge ports 3.
5 is formed. 36 is a back plate provided on the rear surface of the outer box 11, which is attached to the open rear surface of the outer box 1 and the casing 17.
A large number of outside air inflow holes 37 and a large number of outside air outflow holes 38 are formed in each annular region near the center and around the outer periphery. Three motors are provided with two pulleys 40 on their rotating shaft 39a, and belts 41 are stretched between the drum 12 and the pulley part 28 of the fan 24, respectively. and fan 2
4 is driven to rotate. When the fan 24 rotates, the centrifugal air blowing action of the circulation fins 26 causes the drum 1 to
2 is sucked into the casing 17 through the filter 23 and the intake port 22, and passes through the heater 34 to wet the casing 17. It returns into the drum 12 from the discharge port 35 as warm air. On the other hand, due to the centrifugal blowing action of the cooling fins 27, outside air is drawn into the casing 17 through the outside air inflow holes 37 of the back plate 36, and is discharged to the outside of the machine through the outside air outflow holes 38. Due to such circulation of the air inside the drum 12 and flow of the outside air, heat exchange is performed between the two airs mainly through the rotating base plate 25, and the warm air circulating inside the drum 12 is thereby dehumidified.

Note that dehumidified water generated during heat exchange flows through a receiver 43 from a drain port 42 formed at the bottom of the casing 17 and is discharged to the outside of the machine.

According to this embodiment, only the back plate 36 is located behind the fan 24, so in the event that the fan 24 or the like needs repair or inspection, only the back plate 36 can be removed. Good. As a result, the entire inside of the casing 17 is exposed as shown in FIG.
2, the belt 41, etc. can be replaced or repaired.

Furthermore, when assembling, the casing 17 with the pivot @ 20 attached is first fixed to the outer box 11, then the fan 24 and the belt 40 are sequentially assembled, and finally the back plate 36 is fixed. Assembling the casing 3, fan 7, and bell l-9 to the support plate 4 of this type is easier to assemble compared to a configuration in which the support plate 4 had to be fixed to the outer box 1 with the belt 9 under tension. is significantly improved. In addition, especially in this embodiment, since the support plate portion 18 is integrally formed with the casing 17, it is also possible to reduce costs by reducing the number of parts.

In the above embodiment, the support plate portion 18 is integrally formed with the casing 17, but the present invention is not limited to this, and the support plate portion may be integrally provided with a separate support plate. In addition, the present invention is not limited to any particular configuration such as the shape of the support plate, and is not limited to the fan function, etc., and is not limited to the embodiments not shown in the drawings. However, various changes and modifications can be made without departing from the scope of the invention.

[Effects of the Invention] As described above, the present invention has excellent effects in that since the fan inside the casing can be exposed, repair and inspection can be made extremely easy and assembly efficiency can be improved.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a longitudinal cross-sectional view of the whole, Figure 2 being a rear view of the whole with the back plate removed, and Figure 3 being an exploded view of the casing. The perspective view and FIG. 4 are partially cutaway side views showing a conventional example. In the drawings, 11 is an outer box, 12 is a drum, 17 is a casing, 18 is a support plate, 20 is a pivot, and 24 is a fan. Figure 1

Claims (1)

[Claims] 1. A casing with an open rear surface is disposed behind a drum disposed in an outer box, and a fan is provided in the casing for supplying hot air into the drum, and the casing is attached to the outer periphery of the drum. What is claimed is: 1. A drum type dryer, characterized in that the drum dryer is fixed to an outer box by a support plate integrally provided in the casing, and a pivot shaft for pivotally supporting the fan is provided in the casing.