JPS6320955Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a drying device that heats a rotating drum while rotating it, thereby efficiently drying the powder material inside the rotating drum.

Conventionally, drying has been carried out by heating the inside of the rotating drum to a required temperature using an external heat source while stirring the powdered material stored inside the rotating drum. As a means of heating the inside of the rotating drum, generally, hot water is circulated through a hot water pipe installed inside the rotating drum to heat the rotating drum to a required temperature, or hot air is directly heated inside the rotating drum. It was heated by blowing air into it. However, in any of the above methods, the joint structure between the rotary drum that performs rotational movement and the fixed pipe that supplies hot water or hot air from the outside into the rotary drum is designed to prevent hot water, etc. from leaking from the joint. Furthermore, in order to ensure smooth rotation of the rotating drum, advanced bonding techniques such as mechanical seals were required, which had the disadvantage of increasing the cost of the drying device. Furthermore, if a hot water pipe for circulating hot water is installed inside the rotating drum, the capacity for storing powdered materials is reduced, and the powdered material adheres to the piping, making cleaning the rotating drum extremely troublesome. Furthermore, during the drying process, the powder material cannot be properly dried unless the moisture inside the rotating drum is discharged to the outside. A fine wire mesh is placed on the lid body to provide dehumidification holes, but in both cases,
The efficient use of the rotating drum was made difficult as filter devices etc. had to be cleaned from time to time due to the risk of clogging during the drying of the powder material, and as a result, the drying process was not efficient. I couldn't do it.

In view of the above-mentioned points, the present invention simplifies the structure inside the rotating drum to increase the storage capacity of powdered materials and other materials to be dried, and also efficiently drains moisture from inside the rotating drum during drying operations. The purpose of the present invention is to provide a drying device that allows work to be carried out efficiently.The embodiments of the present invention will be described below with reference to the drawings.The reference numeral 1 is a base of the drying device.
A bearing 3 is attached to support the shafts through the shafts in parallel with each other. Reference numeral 4 denotes a friction wheel made of heat-resistant rubber, which is attached to both ends of the rotating shaft 2 so as not to contact the base 1, and 5 is a pulley attached between the bearings 3 of the rotating shaft 2. 5 and an electric motor 6 attached to the back of the base 1, a belt 8 is stretched in a V-shape through a belt insertion hole 7 in the base 1, so that the rotating shaft 2 is driven by the electric motor 6. to rotate the friction wheel 4. Reference numeral 9 denotes a rotating drum made of a net plate, which is formed into a hollow cylindrical shape and is rotatably mounted on the friction wheels 4, 4, and a plurality of sheets are arranged along the length direction of the rotating drum 9 on its inner circumferential surface. Scraping plates 10 are arranged at equal intervals in the circumferential direction, and both ends of the rotating drum 9 are formed into a truncated conical shape compared to the body, and have an opening with a slightly smaller diameter than the body. parts a and b are provided, and the lid body 1 is provided in the openings a and b.
1a and 11b are removably attached by locking fittings 12. Reference numeral 13 denotes a cover tube having approximately the same diameter as the rotary drum 9, which surrounds only the narrowed portions at both ends of the rotary drum 9, and a flange 13a protruding outward on one side is attached to the large diameter body end of the rotary drum 9. A hard heat insulating member 15 formed by molding asbestos cement or the like into a ring shape is attached to a mounting piece 14 provided around the part.
By tightening the bolts through the cover tube 1,
3 is attached to the outer periphery of the end of the rotating drum 9. The rotating drum 9 itself is mounted on the friction wheels 4, 4 via the cover tube 13. 16a, 16b
1 are an air supply pipe and an exhaust pipe, and as shown in FIG. One end is supported and the front end is rotated by a drum 9.
The air supply pipe 16a is disposed toward the upper central part of the base 1 so as not to come into contact with the scraping plate 10, and the air supply pipe 16a is connected to the lower part of the base 1 through the air supply path C and the air supply pipe 19 in the pipe mounting body 18. The exhaust pipe 16b is connected to the blower 20 provided in the pipe mounting body 1.
It is connected to the exhaust port 21 via the exhaust path d in the exhaust port 8 . The lid 11a on the side where the pipe attachment 18 is located has its tip end inserted into a through hole 22 opened at the center of the lid 11a so that it can rotate together with the rotating drum 9. A sliding contact plate 24 attached to the outside of the lid 11a so as to cover the through hole 22 is slidably connected between the pair of clamping plates 23, 23 fitted to the tip of the pipe fitting 18. By inserting the lid 11a,
rotates around the pipe attachment body 18 together with the rotating drum 9 via the sliding contact plate 24. Reference numeral 25 is a locking plate that is attached to the front end surface of the pipe mounting body 18 to prevent the clamping plates 23, 23 from coming off the pipe mounting plate 18; It is an L-shaped fixing metal fitting that is clamped and fixed, and is screwed to the pedestal 17 and the pipe attachment body 18, respectively. Reference numeral 27 denotes a heating device mounting box mounted on the base 1 so as to sandwich the lower half of the body of the rotating drum 9 from both sides of the rotating drum 9. Inside the box 27, there is provided a heat source for heating the rotating drum 9. A high-frequency induction heating device 28 is installed facing the body of the rotating drum 9, and this heating device 28 consists of an induction heating coil 28a and a magnetic shielding plate made of a ferrite core or the like disposed below the coil 28a. is attached to the back surface of a top plate 29 made of heat-resistant resin formed in an arc shape. It can be installed with the 9 side exposed. As shown in FIG. 5, the high-frequency induction heating device 28 converts a commercial frequency power source 30 into a DC power source using a rectifier 31, and then converts it to a high-frequency inverter 32.
is converted into high frequency power by induction heating coil 2.
A high-frequency current is passed through the induction heating coil 28a, and the high-frequency magnetic flux generated by the induction heating coil 28a generates an eddy current in the metal of the rotating drum 9, causing the rotating drum 9 to generate heat due to Joule heat generated by the resistance of the metal. let A temperature sensor 33 detects the heating state of the rotating drum 9, and is arranged below the rotating drum 9 at a required interval. 34 is the box 27
This is a small box connected to both sides (left and right sides in FIG. 1) of which a bearing 3 and a pulley 5 are housed with the rotating shaft 2 passing through it. Reference numeral 35 denotes a cover that covers the upper half of the rotary drum 9 so as to be openable and closable so as not to interfere with the rotation of the rotary drum 9. As shown in FIG. A heat insulating material 36 such as glass wool is pasted and attached to the small box 34 with a hinge e so that it can be opened and closed, and the cover 35, 35 is surrounded on the rotating drum 9 as shown by the solid line in FIG. In this case, the cover 35,
35 is latched at its top by a latching fitting 35a to prevent the covers 35, 35 from opening.
37 is a fan for cooling the induction heating coil 28a installed in the case 37, and 38 is an outside air intake port. 3
Reference numeral 9 denotes a heat insulating material attached to the inside of the cover tube 13, and 40 a cover plate that covers the opening of the cover tube 13 to prevent the heat insulating material 39 from being exposed to the outside.

In addition, in the figure, the air supply and exhaust pipes 16a,
16b is a metal pipe in this embodiment, and the sliding plate 24 and the clamping plate 23 are each made of a synthetic resin plate made of, for example, tetrafluoroethylene resin, which has low frictional resistance and excellent wear resistance. is used.

Next, to explain the operation, when drying a material to be dried such as a powder material, one side of the lid 11b that is covered with one opening b of the rotary drum 9 is removed from the rotary drum 9, and the rotary drum 9 is After storing an appropriate amount of material that requires drying inside, close the lid 1 again.
1b is attached to the rotating drum 9 using a locking fitting 12. Thereafter, the drying temperature is set using the scale 41 and the switch S is turned on. As a result, the electric motor 6 is started, and the rotating drum 9 is moved by the friction wheel 4 to the cover tube 1.
At the same time, a high frequency current is passed through the induction heating coil 28a through the rectifier 31 and the high frequency inverter 32.
8a generates an eddy current in the metal of the rotating drum 9 by the generated high-frequency magnetic flux, thereby heating the rotating drum 9. Therefore, the material to be dried on the rotary drum 9 is gradually dried by the heat that heats the rotary drum 9 while being scraped up by the scraping plate 10 inside the rotary drum 9 . Also, during the drying work, a blower 20 is installed inside the rotating drum 9.
Fresh outside air is supplied through the air supply pipe 19, the air supply path C, and the air supply pipe 16a. As a result,
The moisture generated in the rotating drum 9 is replaced with the fresh outside air and is sequentially discharged from the exhaust port 21 of the pipe fitting 18 via the exhaust pipe 16b and the exhaust path d. That is, during the drying operation, the inside of the rotating drum 9 is constantly supplied with fresh outside air and good ventilation is maintained, so that the drying operation is facilitated. Moreover, one side end of the rotating drum 9 is
The sliding contact plate 24 attached to the lid body 11a is slidably rotated while being sandwiched between the clamping plates 23, 23 fitted to the pipe attachment body 18, thereby maintaining good airtightness of the rotating drum 9. Since there is a rotating drum 9, the outside air is
When the material to be dried is being fed inside, a part of the material to be dried is blown away by the outside air, and the sliding contact plate 24 is
There is no leakage to the outside from between the and the clamping plates 23, 23. Furthermore, since the rotating drum 9 is mounted on the friction wheels 4, 4 via the cover tube 13, the sliding plate 24 of the lid 11a is not subjected to any special load and can be inserted between the clamping plates 23, 23. Since it is only inserted, the rotational movement of the rotating drum 9 will not be made unsmooth. When the heating temperature of the rotating drum 9 reaches the set temperature, it is detected by the temperature sensor 33, and this detection signal is sent to the control section 43 via the comparison element 42 to operate it.
3 sends a stop signal to the high frequency inverter 32 to stop the high frequency inverter 32, and the rotating drum 9
Temporarily suspend heating. When the temperature of the rotary drum 9 falls below the set value, the high frequency inverter 32 is operated again according to a command from the control section 43 to resume heating the rotary drum 9. By repeating such an operation, the drying process for the material to be dried in the rotating drum 9 is performed. During the drying process, the induction heating coil 28a is cooled by the fan 37, so it does not overheat, and the cooling air passes through the box 27 and is discharged to the outside from the belt insertion hole 7 of the base 1. Therefore, the rotating drum 9 is not cooled down. After drying, when taking out the dried material in the rotary drum 9, the covers 35, 35 covering the upper half of the rotary drum 9 are opened as shown by the two-dot chain line in FIG. After it has cooled down, open the lid 11b and take it out.

Next, when washing the inside of the rotating drum 9 with water to dry different types of materials, the pipe attachment body 18 and the fixing fittings 26 are unfixed, and the cover plates 35 and 3 are unfixed.
5, lower the rotary drum 9 from the friction wheels 4, 4 onto the floor, and then attach the lid 11a to the locking metal fitting 1.
2 is released and removed from the rotating drum 9 together with the pipe attachment body 18. At this time, since the supply and exhaust pipes 16a and 16b are attached to the pipe attachment body 18, they do not remain inside the rotating drum 9. Further, the other lid 11b is removed from the rotating drum 9 in the same manner as described above, and only the hollow cylindrical rotating drum 9 is washed with water. Further, the supply and exhaust pipes 16a and 16b may be washed with water together with the lids 11a and 11b. After washing with water, the rotating drum 9 is assembled in the reverse order to the above and mounted on the friction wheels 4, 4.

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

(1) While heating the rotating drum and drying the material to be dried inside, the rotating drum is designed so that fresh outside air can always be supplied by a blower, so the inside of the rotating drum is kept well-ventilated. Since drying is carried out well, drying work can be carried out efficiently in a short time.

(2) In addition, both the air supply pipe that sends outside air from the blower into the rotating drum and the exhaust pipe that exhausts moisture inside the rotating drum to the outside have an opening near the top of the rotating drum. Therefore, there is no possibility that the material to be dried will enter the pipes and adversely affect the ventilation inside the rotating drum.

(3) Furthermore, the pipe mounting body to which the above-mentioned air supply pipe and exhaust pipe are attached is constructed by sandwiching a sliding plate provided on one lid of the rotating drum between the clamping plates, so that the rotating drum can easily attach the above-mentioned pipe to the pipe mounting body. Because it is tightly and rotatably fitted to the body,
Even though there are two pipes fixed inside the rotating drum for supplying and discharging air, the rotating drum can operate without being obstructed by these pipes.
It can be rotated smoothly and well.

As explained above, the present invention simplifies the structure inside the rotating drum to increase the storage capacity of powdered materials and other materials to be dried, and also effectively drains the moisture inside the rotating drum during drying operations. An object of the present invention is to provide a drying device that can perform drying work efficiently.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the drying device of the present invention, Fig. 2 is a side view, and Fig. 3 is A--A in Fig. 1.
A cross-sectional view, FIG. 4 is a cross-sectional view showing an enlarged portion P of FIG. 1, and FIG. 5 is a schematic diagram for explaining the operation of the drying apparatus of the present invention. 4...Friction wheel, 9...Rotating drum, 13...Cover tube, 15...Insulating member, 16a...Air supply pipe,
16b...exhaust pipe, 18...pipe mounting body,
20...Blower, 21...Exhaust port, 28...High frequency induction heating device.

Claims (1)

[Scope of utility model registration request] A rotary drum rotatably mounted on a friction wheel is rotated by the electrically driven friction wheel, and the material to be dried in the rotary drum is stirred and heated by heat that heats the rotary drum. In the dryer for drying, a pipe attachment body is arranged separately from the rotary drum at one side end of the rotary drum, and the side end of the rotary drum is slidably fitted into the pipe attachment body. , An air supply pipe and an exhaust pipe are attached to the above-mentioned pipe mounting body toward the upper side of the rotating drum, the air supply pipe is connected to the blower through the pipe mounting body so as to be able to communicate with the air blower, and the exhaust pipe is connected to the pipe mounting body. A drying device characterized in that it communicates with a provided exhaust port.