JPH0646481Y2 - Drum type dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a drum type drying device applied to the drying of a product having large viscoelasticity.

[Conventional technology]

The conventional drum type drying device has a structure as shown in FIG. That is, a pair of drums 01, through which high-heated steam, high-temperature gas, etc. are passed inside and supported by bearings 02 on both sides, rotate in the direction of the arrow of the drawing, from the material-to-be-dried pipe 03 to the meeting portion of both of them. An article to be dried 05 containing water is supplied. The material to be dried 05 that has been supplied is spread between both drums 01 to form a thin film, which is brought into close contact with the peripheral surface of the drum 01 and rotationally moves,
In the meantime, it is dried and reaches the installation portion of the scraper 04, where it is peeled off to become a product.

[Problems to be solved by the device]

The conventional drum type drying device has the following problems to be solved.

(1) In a conventional device having a structure in which the material to be dried is directly pressed and spread by the drum, as shown in FIG. 9 (c), the material to be dried attached to both drums is left and right at the part where the drum is separated. However, due to the adhesiveness of the material to be dried,
The two drums behave as if they were peeled from each other,
Adhesion to the drum surface is reduced, and in some cases it may fall off the drum.

(2) Due to the action of attracting the materials to be dried when separating them into both the drums described above, the materials to be dried do not evenly adhere to both drums, resulting in uneven thickness and uneven coating, until reaching the scraper for scraping. In addition, it may not be sufficiently dried, or may be over-dried, resulting in defective products such as darkening.

(3) Due to the circumstances as described in (2) above, it is necessary to reduce the number of rotations of the drum so as to prevent insufficient drying, which is an obstacle to improving productivity.

(4) The undried material to be dried, which has fallen off the drum, has a strong adhesiveness and requires a long time of stopping the apparatus and a great deal of time and labor for removing and cleaning the material.

(5) When there is a hard foreign matter in the material to be dried, since the pressing force of the drums is large, the foreign matter that has been bitten may scratch the drum surface.

[Means for Solving the Problems]

As a means for solving the above problems, the present invention pressurizes and extends a material to be dried, which is partially supplied at substantially equal intervals on the surface of a drum which is heated and automatically or driven, and relatively uniformly dries the surface of the drum. In a drum-type drying device for forming a thin layer of a material and drying the roll, a roll provided in the vicinity of the upper part of the drum so as to be substantially parallel to the axis of the drum and to have a peripheral surface capable of holding a predetermined clearance with the peripheral surface of the drum. A bearing that supports the roll at its axial end and that is capable of responding to the above-mentioned gap depending on the hardness, size, etc. of the material to be dried passing between the roll and the drum and that applies a predetermined pressing force in the direction of the drum. An object of the present invention is to provide a drum type drying device characterized by comprising:

[Action]

Since the present invention is constructed as described above, it has the following effects.

(1) In the vicinity of the upper part of the drum, the material to be dried is supplied to the roll and the drum immediately before the drum so that the material to be dried is spread on the heating drum by the roll having a relatively low temperature. There is no separation of the material, and the material to be dried is attached only to the drum side.

(2) By providing a roll above the drum and supplying the material to be dried immediately before the roll, approximately 1/4 of the surface of the drum which has not been used as a drying surface in the past (the meeting of the drums from the top surface) Is used to improve the drying efficiency.

(3) Since the gap between the roll and the drum can respond depending on the hardness and size of the material to be dried, even if hard foreign matter is mixed in the material to be dried, the roll will react and escape and press the hard foreign matter against the drum. Since it does not exist, the damage to the drum surface is addressed.

(4) Since the pressing of the material to be dried is performed by the roll, the drum does not need to be a pair and may be a single drum.

〔Example〕

A first embodiment of the present invention will be described with reference to FIGS.

In these figures, bearings 2 are attached to both ends of the roll 1, and the roll 1 is suspended by a bracket 4 provided on a fixed side frame via a shaft rod 3 coupled to the bearing 2. A spring (disc spring in FIG. 2) 5 is normally attached to the shaft 3 between the plates 6 and 7 in a pre-compressed state, and a stop bolt 8 screwed into the bracket 4 is lightly attached to the plate 7. It's set to hit.
The above-mentioned combination is provided as a pair at both ends of the roll 1 as shown in the figure.

Further, a small gear 9 which meshes with a large gear 101 provided on the drum 20 and transmits a rotational force is attached to one end of the roll 1. The surface of the roll 1 is subjected to an appropriate surface treatment (Teflon coating, plating, etc.) in order to prevent the adhesion of the material to be dried. Further, the roll 1 is provided with a connection port 102 for introducing and discharging cooling water (or auxiliary heating medium). Therefore, the roll 1 is a hollow roll. A dial gauge 10 is mounted on a fixed frame which is not particularly called for adjusting a clearance described later, and its contact is provided so as to come into contact with the plate 103 protruding from the bearing 2.

In the above-described configuration, for adjusting the clearance between the drum 20 and the roll 1, the nut 12 attached to the upper end of the shaft rod 3 is turned to rotate the shaft rod 3,
The entire assembly of the bearing 2 and the roll 1 is lifted and lowered. At that time, the stop bolt 8 is retracted so as not to contact the plate 7, and when a predetermined clearance can be set,
It is set so that the tip of the stop bolt 8 is in close contact with the plate 7. When determining the clearance between the drum 20 and the roll 1, it is possible to read the position of the roll 1 by the dial gauge 10 and thus the relative clearance between the drum 20 and the roll 1. Instead of the dial gauge 10, a scale plate and a pointer or a differential transformer type gauge may be used.

When the material to be dried is supplied, the drum follows the rotation of the drum 20.
The material to be dried is sandwiched between the roll 20 and the roll 1, compressed and spread by the roll 1 and the drum 20, and is adhered or applied to the surface of the drum 20 in the form of a sheet having a substantially uniform thickness. At this time, the roll 1 is lifted upward by the reaction force from the material to be dried, but the roll 1 needs to maintain its position with respect to a certain reaction force.

The force for lifting the roll 1 upward is transmitted to the shaft rod 3 via the bearing 2 and further to the plate 6, the spring 5 and the plate 7 attached to the shaft rod 3, but is attached to the fixed side bracket 4. It is stopped by the stop bolt 8. However, if the force of pushing upward exceeds the value obtained by adding the self-weight of the roll 1 and the preliminary compression force of the spring 5, the shaft 3
Slides upward at the fitting part with the plate 7,
Allow roll 1 to be pushed up. This prevents the roll 1 and the like from being damaged when a reaction force equal to or higher than a predetermined pressing force is generated (for example, a hard foreign matter is caught). Sliding plates 11 are provided on both sides of the bearing 2 and are fitted in groove portions (not shown) of the bearing 2, and serve as guides when the roll 1 moves up and down.

The first embodiment in which the biting of a hard foreign matter between the roll 1 and the drum 20 is escaped by the spring action has been described above, but an example in which it is escaped by the cylinder will be described next by the second embodiment. FIGS. 5 to 7 are views of the second embodiment. As shown in FIG. 5, each set of the devices of the embodiment is attached to each of the drums 20 provided separately from each other. Each device has the same configuration, and one of these will be described. Similar to the first embodiment, bearings 2 are attached to both ends of the roll 1 and slide plates 31 for vertical movement guides fitted in grooves on both sides of the roll 1 are attached to a fixed frame which is not particularly called. The bearing 2 is connected to both ends of a cylinder 33 attached to a fixed frame bracket 32. Further, the contact of the dial gauge 10 is attached so as to come into contact with the protruding portion of the bearing 2.

On the other hand, a motor 34 with a speed reducer is coupled to one end of the roll 1 to directly rotate the roll 1.

Next, in order to avoid redundancy, the operation of the configuration different from that of the first embodiment will be described. The clearance between the drum 20 and the roll 1 is adjusted by a stop block 35 and a shim 36 attached to the bearing 2. Instead of the stop block 35 and the shim 36, a jack bolt 37 shown in FIG. 5 (a) may be used. A fluid supply circuit to the cylinder 33 is provided so as to counteract the force for pushing the roll 1 upward by the downward pushing force of the cylinder 33 and allow the pushing force when the pushing force exceeds a certain value. An example thereof is shown in FIG. In the figure, the circuit portion is shown regardless of the vertical direction (against gravity), but the roll 1 and the bearing 2 portion are shown above and below the figure, and the roll 1 is its own weight. When a larger upward force is received by the material to be dried, the cylinder 33 appropriately restrains it downward, and in the case of a large force exceeding the limit due to hard foreign matter, it escapes upward and the roll 1 is damaged. prevent.

Further, since the rotation speed of the motor 34 attached to the roll 1 can be changed by inverter control, the roll peripheral speed different from the drum peripheral speed may be applied as necessary to impart a kneading action to the material to be dried. Is possible.

As described above, according to the first embodiment, the hard foreign matter and the like can be escaped upward by the roll that is restrained downward by the spring, and neither the roll surface nor the drum surface is damaged. In the case of the present embodiment, since the structure is simple and the foreign matter is avoided by the spring, there is an advantage that it can be installed at low cost. In addition,
In the case of the first embodiment, since the material to be dried is spread on the drum by the roll, a large spreading force is not required between the drums. Therefore, the gap between the drums can be made larger than that of the conventional example, and the possibility that the hard foreign substances that have passed through the roll and the drum damage the drums is extremely small. An automatic stop device that detects the amount of upward movement of the roll (escape) due to foreign matter and if the program determines that it is large enough to damage the drums, immediately stops operation and avoids damage to the drum. It is free to attach. Of course, it is also free to separate the drums sufficiently.

In the case of the second embodiment, the clearance between the roll and the drum can be adjusted, and maintaining a constant clearance is basically the same as in the case of the first embodiment, but constant pressure control and hard and large foreign matter are mixed. Since the escape of the roll in the case of being carried out is due to the cylinder, there is an advantage that the average pressing force required for the material to be dried can be freely adjusted each time.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

(1) Since a roll is provided near the upper part of the drum and the material to be dried is supplied immediately before that, almost the entire circumference of the drum is utilized for drying, and it is possible to dry the material to be dried uniformly and with high efficiency.

(2) It has become possible to prevent the surface of the drum from being scratched by a hard material such as a foreign substance contained in the material to be dried.

(3) The material to be dried does not fall off the drum surface, and the time and effort required for cleaning the device are reduced.

(4) The thickness of the material to be dried applied to the drum can be set easily and reliably.

(5) It is possible to obtain a drying device that is small, simple, and low cost.

[Brief description of drawings]

1 is a side view of the first embodiment of the present invention, FIG. 2 is a view II of FIG. 1, FIG. 3 is a view III of FIG. 1, and FIG. 4 is an arrow of FIG. FIG. 5 is a side view of the second embodiment of the present invention, FIG. 5 (a) is a view of an alternative jack bolt, and FIG. 6 is a plan view of FIG. Etc. are shown in cross section), FIG. 7 is a right side view (front view) of FIG. 5, FIG. 8 is a fluid supply circuit diagram used in the second embodiment, and FIG. 9 is a diagram of a conventional example. Is a schematic side view, (b) is a right side (front) view of (a), and (c) is an enlarged view of an enclosure c of (a). 1 …… Roll, 2 …… Bearing 3 …… Shaft bar, 4 …… Bracket 5 …… Spring, 6,7 …… Plate 8 …… Stop bolt, 9 …… Spindle 10 …… Dial gauge, 11 …… Slide plate 12 …… Nut, 20 …… Drum 31 …… Slide plate, 32 …… Fixed frame bracket 33 …… Cylinder, 34 …… Motor 35 …… Stop block, 36 …… Shim

Claims (1)

[Scope of utility model registration request] 1. A material to be dried, which is heated and is partially or partially supplied at substantially equal intervals on a drum surface which is automatically or driven, is spread by pressure to form a relatively uniform thin layer on the surface of the drum. In a drum-type drying device for forming and drying, a roll provided in the vicinity of the upper part of the drum so that the peripheral surface of the drum is substantially parallel to the shaft of the drum and can hold a predetermined clearance with the peripheral surface of the drum; And a bearing capable of responding to the above-mentioned gap depending on the hardness and size of the material to be dried passing between the roll and the drum and applying a predetermined pressing force in the direction of the drum. A drum type drying device characterized in that