JPS5825271Y2 - Tobacco dryer heating element - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of several sets of heating elements that are installed separately to form a heating chamber in the body of a cigarette dryer.

Conventionally, as shown in Utility Model Publication No. 49-8960, tobacco dryers have a dryer body that rotates with the tobacco loading side high and the outlet side tilted low.The whole circumference of the dryer is divided into several parts. Heating tubes by steam supply are arranged in an L-shape in parallel with the axis of the body in the circumferential and radial direction, and both ends of the heating tubes are connected by a heating tube header and a condensing wood tube header. A pipe array type heating element is arranged around the entire circumference of the body, and the heating tube group is heated by passing steam through it, and at the same time, it is rotated together with the body, heating and drying the tobacco loaded therein and moving it toward the exit side. The heating element, which is made up of a large number of arranged heating tubes and has a hole-shaped configuration, can be used to discharge tobacco in the valleys between the heating tubes, or when tobacco is ejected from the iron part. Since the phenomenon of spillage occurs, as shown in Figure 6, a closing plate a to prevent tobacco spillage is required between the heating tubes, which reduces the effective heat dissipation of the heating group, which directly affects the drying and curling of tobacco. The area is only on one side shown by the shaded area on the E line, which reduces the effective heat dissipation area, increases the weight due to the installation of a large number of closing plates, and makes manufacturing and processing complicated.

In addition, the steam supply and drain discharge headers that are required at both ends of the pipe array heating tubes that serve as the heating element must be welded directly and individually to this large number of heating tubes, so the pipe gaps are narrow. Combined with this, welding work is extremely difficult, and because of this, stress is easily applied to the welded joints.
As a result, there were drawbacks such as steam leakage often occurring from the welded portions of the heating tubes.

Compared to the L-shaped heating element that is installed in a rotary tobacco dryer and is made up of pipe-arrayed heating tubes, this heating element has a larger effective heat dissipation area, which is the contact surface for tobacco, and is also lightweight and easy to manufacture. Another object of the present invention is to provide a heating element for a cigarette dryer at a low cost, which does not cause strain on the welded portion and is free from the risk of steam leakage.

Embodiments of the present invention will be described below with reference to the drawings.

A plurality of cigarette dryer bodies 1 are provided at equal intervals on the inner circumference along the axial direction of the cigarette dryer body 1 which rotates with a slight inclination in the horizontal direction.
Each one of them is a heating element 14 which forms a hollow curved heating chamber which is open at the center side of the cylinder axis and has a hook-shaped part 2 bent at one end of the open edge, and the heating element is formed on the outer periphery. A continuous corrugated plate 10 having a tangential circular configuration is provided on the inner circumferential surface of the substrate, which forms a steam passage closed at both ends along the longitudinal direction of the substrate with wavy protrusions 11 on the inner peripheral surface of the substrate. Counterpolymerize,
The contact portions 12 between the corrugated bottom portion of the continuous corrugated plate 10 and the substrate 3 are joined by pressurized spot welding at a predetermined interval in the longitudinal direction of the substrate, so that both longitudinal ends of the substrate are connected to the inside of the wavy protrusion 11. It is characterized by providing communicating porous portions 8 and 9, and providing hollow section headers 4 and 5 having a steam supply vibro and a drain discharge pipe 7, respectively, by welding around the outer peripheral side of the substrate of the porous portions 8 and 9. This is the heating element for a tobacco dryer.

Figures 1 and 2 show an assembled front view and a cutaway side view of the rotary cigarette dryer body, respectively, in which the heating body 14 having the above structure is incorporated into the rotary cigarette dryer body. Similar to a tobacco dryer, the receiver is placed on rollers (not shown).

A plurality of heating bodies 14 are equally divided and arranged on the inner circumferential side of the body 1, and each is fixed to the inner wall of the body 1 with a mounting bracket 15.

Further, each heating body 14 is long along the direction of the cylinder axis, is installed with the center side of the cylinder axis open, and has a hook-shaped part 2 bent inward at one end of the open edge, making it hollow. A curved heating chamber is formed.

A closing plate 16 is installed between adjacent heating bodies 14 to prevent tobacco from spilling out.

The headers 4 and 5 provided at both ends of the heating body 14 in the longitudinal direction are connected to a steam supply and drain discharge device (Fig. (not shown).

3, 4, and 5 show a side view, a front sectional view, and a partially enlarged sectional view of a part of the header of the heating element 14 of the present invention, and the heating element 14 is shown with its outer circumferential side facing up. Continuously corrugated plate 1 has a smooth curved substrate 3 and has a tangent circle configuration to provide a large heat dissipation area on the inner circumferential side which is a direct heating surface for tobacco.
0 is opposed to the substrate 3, and the contact portions 12 between the corrugated bottom portion of the corrugated plate and the substrate 3 are pressure spot welded at a predetermined interval in the longitudinal direction of the substrate as shown in FIG. Wavy protrusion 1
1 is closed with blind lids 13 to form a steam passage, so that a minute gap is generated instead of a molecular bond between metals except for the pressurized point weld in the contact part 12. ,
When steam is vented into each corrugated protrusion 11, steam flows into this portion, and the entire corrugated curved surface of the continuous corrugated plate 10 receives the heat of the steam, and the entire surface of the continuous corrugated plate 10 inside the heating body 14 is heated. becomes a large effective heat dissipation area for cigarettes.

The heating body 14 of the present invention is the body 1 of the tobacco dryer as described above.
It is used by arranging multiple pieces inside as shown in Figure 1.
To explain its operation, as in a normal cigarette dryer, the body 1 is rotated in the direction of the arrow in FIG. Then, the wavy protrusion 1 of the continuous corrugated plate 10 passes from the header 4 through the porous portion 8 provided in the substrate 3.
1, and this steam also vents through the minute openings between the continuous corrugated plate 10 and the pressurized spot welds of the substrate 3, and around the heating body 14 C, D, E, as shown in FIG. F and the entire surface of the heating body 14 in the longitudinal direction A and B shown in FIG. be discharged.

On the other hand, the tobacco loaded into the body 1 of the tobacco dryer absorbs heat by passing steam to each of the heating elements 14, and radiates heat from the entire surface of the board.The continuous corrugated board 10 has a hollow curved shape and has a large effective heat radiation area. As the body 1 rotates, it repeatedly rises, reverses and falls, and is smoothly heated, properly dried, and, like a normal rotary dryer, cigarette packs are Tobacco is gradually transferred to the discharge side by the inclined rotation of the body 1, which is arranged such that the entrance side is high and the discharge side is low.

As explained above, inside the rotary body of the cigarette dryer,
The heating elements of the present invention, which are arranged in plural pieces along the cylinder axis and equally divided on the inner circumference, are long in the cylinder axis direction and have a smooth outer peripheral surface with a hook-shaped part at one end of the curved open edge. A hollow curved substrate and a continuous corrugated plate having a tangential circular configuration forming a vapor passage with a wavy protrusion along the longitudinal direction of the substrate are opposed to the inner peripheral surface of the substrate,
The contact area between the wave bottom and the board is joined by pressurized spot welding at intervals, and the curved circumferential surface of the heating body forms a continuous waveform, making it possible to convert the conventional heating tube into an L-shape. There is no need for a closing plate that must be installed to prevent tobacco from getting caught in the gap between the tubes or falling through the gap, as in the case of a pipe-array heating element arranged in parallel with the mold, and the pipe-array heating element Due to the presence of closing plates between the heating tubes, the heat radiation area of the heating tubes that come into contact with the tobacco is halved, and the ineffective heat radiation area accounts for a large proportion, resulting in a lot of wasted thermal energy.However, the heating element of the present invention Since the contact points between the continuous corrugated plate and the substrate are spaced apart and joined by pressure spot welding, steam can vent even in the minute holes between the welds, and the entire surface of the continuous corrugated plate on the inner surface of the heating element is heated. It serves as a heat dissipation surface, and its wavy shape provides a large effective heat dissipation area that comes into contact with the cigarette, and reduces loss of thermal energy.

In addition, the heating element of the present invention has a curved substrate with a smooth outer circumferential surface and a continuous corrugated plate on the inner circumferential surface, making it easy to bond and manufacture.
Moreover, it is much lighter and can be obtained at a lower cost than the conventional pipe arrangement type heating body which requires closing plates between the parallel heating tube groups and base tubes.

The header for supplying steam and discharging drain from the main heating element is provided as a hollow section around the outer periphery of the substrate, and the structure allows steam supply and drain discharge from the porous part provided in the substrate, so the pipe arrangement is There is no need for the manufacturing process of welding a large number of parallel heating tubes to the header one by one as in a type heating element, and there is also the difficulty of welding, stress on the welded parts, and steam leakage. This shortcoming can be solved very easily, maintenance is easy, and when using a plurality of heating elements distributed equally around the entire circumference of the body of a rotary cigarette dryer, the hook-shaped Due to the hollow curved shape of the heating body, the tobacco is held for a long time during rotation, which is advantageous for drying and curling the tobacco.

[Brief explanation of the drawing]

Fig. 1 is an assembled front view of a cigarette dryer using the heating element of the present invention, Fig. 2 is a side view with the body of the dryer cut away, and Fig. 3 is an enlarged side view of the heating element of the invention for a cigarette dryer. FIG. 4 is a front sectional view of FIG. 3, FIG. 5 is an enlarged sectional view of a part of the header of the heating element of the present invention, and FIG. 6 is a schematic front sectional view of a conventional heating element for a cigarette dryer. . 1... Body, 2... Hook-shaped part, 3...
...Curved board, 4゜5...Header, 6
... Steam supply pipe, 7 ... Drain discharge pipe, 8, 9 ... Porous section, 10 ...
... Continuous corrugated plate, 11 ... Wave-like protrusion, 14 ...
... Heating body.

Claims (1)

[Scope of utility model registration request] A plurality of cigarette dryers are provided on the inner periphery of the body 1 of a cigarette dryer which is rotated with an inclination in the horizontal direction, and are equally divided along the inner circumference along the body axis direction, each one of which opens the body axis 6 side, and A heating body 14 forming a hollow curved heating chamber having a hook-shaped portion 2 bent at one end of the open edge, the heating body having a curved cylindrical substrate 3 with a smooth outer circumferential side, A continuous corrugated plate 10 having a tangential circular configuration, which forms a steam passage closed at both ends in the longitudinal direction of the substrate with wavy protrusions 11 on the circumferential surface, is opposed to each other, and the contact portion 12 between the wave bottom of the continuous corrugated plate 10 and the substrate 3 is connected in the longitudinal direction of the substrate. The substrates are joined by pressure spot welding at a predetermined interval in the direction, and porous portions 8 and 9 communicating with the inside of each wavy protrusion portion 11 are provided at both ends in the longitudinal direction of the substrate.
, 9 are provided with headers 4 and 5 each having a mouth-shaped hollow cross section and having a steam supply vibro and a drain discharge pipe 7, respectively, by welding and surrounding the substrates.