JP4632967B2 - Combined steam processing dryer - Google Patents

Description

  The present invention relates to a device for preventing the adhesion of steaming dew and improving the color and flavor of tea leaves steamed by a steamer before the kneading with a coarse kneader in the manufacture of sencha. The present invention relates to a compound steamed leaf processing dryer that performs a plurality of types of processing on a single machine.

  In the tea production process, it is preferable to further subdivide and process the tea leaf processing from the steaming process to the rough kneading process by the koji machine in several stages. For this reason, multiple types of single-function processing devices were installed in several stages to meet the needs. Specifically, as shown in FIG. 5, a stationary drum processing machine 40 or a leaf-type machine 41 such as a fluid type is used (refer to Patent Documents 1 and 2, for example). The tea leaves are put into the fixed drum processing machine 40 and the leaf cutter 41 by using the vertical bucket conveyor 42 to put the tea leaves from the upper opening of the dry drum.

  However, even though such a technique can be adopted in a large-scale factory, it has been difficult to introduce it in a small-scale tea garden called so-called self-made because of space constraints. On the other hand, even in the case where a plurality of devices can be introduced in a large-scale factory, a vertical bucket conveyor or the like is usually used so as to pass over the operator's head in order to transfer tea leaves between the devices. When such related equipment is included, it is necessary to increase the total number of devices and to frequently carry out sanitary management of overhead conveyor lines centering on vertical bucket conveyors.

When trying to improve such an existing method, it is not impossible to assume a technical idea until it can be solved by obtaining a plurality of processing functions with a single device. There was a problem that had to be solved separately to make progress. In other words, no proposal has yet been made for an actual machine that can perform processing in accordance with actual changes in the properties of steamed tea leaves (such as the progress of drying) with a single device. In other words, models that can perform different processing operations with a single device were still under study.
JP-A-9-168364 Japanese Patent No. 3386194

  The present invention has been made from such a background, and has attempted to develop a new combined steamed leaf processing dryer having the functions of both a fixed barrel processor and a leaf cutter. It is intended to solve the problem of purchase costs.

  That is, the compound steamed leaf dryer according to claim 1 divides the inside of the drying chamber into two chambers, and each drying chamber is provided with one rotating main shaft that is driven independently of each other. The drying chamber is a fixed barrel processing chamber in which a plurality of leaf ridges are attached to the rotating spindle and the rotation speed of the rotating spindle is set to 15 to 28 rpm, and the drying chamber on the downstream side is connected to the rotating spindle. A plurality of leaf ridges and claws or only a plurality of leaf ridges are attached to form a fluidized leaf punching chamber in which the rotational speed of the rotary spindle is set to 28 to 41 rpm.

  Furthermore, in addition to the above requirements, the composite steamed leaf dryer according to claim 2 further includes a flow control intermediate valve for controlling the flow rate while separating the fixed barrel processing chamber and the fluidized leaf punching chamber with a partition wall. It is characterized by providing.

  In addition to the above requirements, at least one finger of the wiper at the tip of the leaf barrel of the fixed barrel processing chamber has a blade shape and is rotated. It is configured to be tiltable in the direction.

  In addition to the above requirements, the composite steamed-foil treatment dryer according to claim 4 is also installed on the back side of the tiltable finger in a fixed state with a blade-shaped finger bent at a predetermined angle on the opposite side in the rotational direction. It is characterized by being.

  In addition to the above requirements, the compound steamed leaf processing dryer according to claim 5 includes a moisture measuring device for measuring moisture by sampling tea leaves in the fixed barrel processing chamber and tea leaves in the fluidized leaf punching chamber. In addition, it is provided in the dry dry drum facing the fluidized leaf punching chamber, and the amount of hot air supplied based on this moisture value, the number of rotations of each rotary spindle, the opening amount of the flow control intermediate valve, or the end of the fluidized leaf punching chamber And a control device for controlling the opening amount of the discharge valve for discharging the tea leaves.

The compound steamed leaf dryer according to the present invention has the following effects by the above-described means.
That is, according to the composite steamed leaf processing dryer according to claim 1, the fixed barrel processing machine that performs the pre-drying processing of the tea leaves before brewing and the fluidized leaf punching machine are integrated, so that members constituting these are integrated. The number of points and a transfer device for transferring between these devices are not required, and the device can be provided at a low cost, and the installation space can be reduced.

  Further, according to the compound steamed leaf dryer according to claim 2, each of the chambers is provided by separating the fixed barrel processing chamber and the fluidized leaf punching chamber by a partition wall and providing a flow control intermediate valve therein. It is possible to maintain an atmosphere suitable for the treatment.

  Further, according to the composite steamed leaf processing dryer according to claim 3, when the tea leaves are picked up with leaf grinds and thrown away upward, at least one finger of the wiper is tilted in the rotating direction, As the dropping force becomes stronger, the tea leaves sandwiched between the fingers can be surely shaken off.

  According to the composite steamed leaf dryer according to claim 4, it is possible to scoop up tea leaves that are not able to scoop up tea leaves well because the tiltable fingers are bent. In addition, since the finger is bent at a predetermined angle on the opposite side in the rotation direction, the tea leaves are not sandwiched between the bottom of the cocoon drying drum and the leaf texture, and a more effective leaf cutting process can be performed. Furthermore, since the finger is bent at a predetermined angle on the opposite side in the rotation direction, it is possible to move away from the leaf texture of the tea leaf when thrown upward.

  Moreover, according to the composite steamed leaf processing dryer according to claim 5, it becomes possible to make the tea leaf have a desired moisture value by using a moisture measuring device for measuring moisture.

  The best mode of the present invention is specifically as described in the following examples.

The present invention will be described below based on the illustrated embodiments.
As shown in FIG. 1, the compound steamed leaf dryer 1 according to the present invention includes a semi-cylindrical lower torso 3 fixed to a machine frame, and an upper torso 4 connected to the upper part thereof. It comprises a cocoon drying drum 2 consisting of The lower body portion 3 is formed by sticking a large number of bowl-shaped duck plates 3a on the inner surface thereof in the longitudinal direction in close contact. The upper torso 4 above the lower torso 3 is formed by covering the machine frame with a flat panel or the like, and forms a box-like space whose upper part is open. A front management door 5 is provided on the front surface of the upper body portion 4 to be opened and used when performing various setting adjustments, maintenance inspections, and cleaning. On the other hand, a hot air guide 6 is provided behind the upper body portion 4, and hot air from a hot air generator H provided outside is sent into the dry drum 2. An inlet 21 and an outlet 31 are respectively provided on the left and right side plates of the kite drum 2. The vibratory conveyor B faces the input port 21 and the discharge port 31, and a discharge valve 37 is provided at the discharge port 31. The discharge valve 37 has a semicircular plate shape and can be tilted by a rotating shaft 37a.

  The inside of the dry drum 2 is partitioned substantially at the center by a partition wall 8, the upstream side is a fixed barrel processing chamber 20, and the downstream side is a fluidized leaf punching chamber 30. The partition wall 8 is provided with a flow control intermediate valve 9, and the flow control intermediate valve 9 has a semicircular plate shape. The flow control intermediate valve 9 is tiltable by a rotating shaft 9a, and the flow rate of the tea leaves A is controlled by the tilt angle.

  The fixed cylinder processing chamber 20 will be described. A rotation main shaft 22 is suspended through the center of the fixed cylinder processing chamber 20, and a plurality of leaf blades 23 are provided on the rotation main shaft 22. The fixed cylinder processing chamber 20 corresponds to a conventional fixed cylinder processing machine 40, and the rotation speed of the rotary spindle 22 is set to 15 to 28 rpm, preferably about 22 rpm. Is done. The rotation main shaft 22 of the fixed barrel processing chamber 20 is driven by a variable speed drive motor M1 installed on the inlet 21 side. Further, in the fixed barrel processing chamber 20, for example, 360% of tea leaves A are dried to 320 to 340% by the moisture content display based on the dry amount.

  The leaf texture 23 will be described. As a characteristic of the present embodiment, the leaf drum 23 of the fixed barrel processing chamber 20 is composed of a blade-shaped movable plate and an auxiliary plate 25B that are attached so that the center finger 25 of the tip wiper 24 is overlapped. Consists of. The movable plate at the front in the rotational direction is attached so as to be able to tilt in the rotational direction, and the auxiliary plate 25B attached to the back side thereof is attached in a fixed state, and has a predetermined angle (about 40 in this embodiment) on the opposite side in the rotational direction. Degree) is bent and installed. In the figure, the bending angle of the auxiliary plate 25B is indicated by α.

  At the end position of the fixed barrel processing chamber 20 of the front management door 5, a moisture measuring device 7F that samples the tea leaves A in the fixed barrel processing chamber 20 at this position, measures the moisture value, and calculates the moisture content is provided. In the moisture measuring device 7F, the applicant forms a transmission path between a microwave transmitter and a receiver as disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-247951. It is located in the tea leaf accommodating part 70 to be accommodated, and the moisture content is measured. The measured tea leaves A are pushed back into the fixed barrel processing chamber 20 by a return plate 72 driven by a return cylinder 71 as an example.

  Next, the fluidized leaf chamber 30 will be described. A rotation main shaft 32 that is independent from the rotation main shaft 22 of the fixed barrel processing chamber 20 is suspended through the center of the fluidized leaf punching chamber 30. And are provided. Only the leaf texture 33 is provided on the upstream side, and both the leaf texture 33 and the grip 36 are provided on the downstream side. As shown in FIG. 3 (b), the repellent hand 34 of the leaf weir 33 is a leaf weir 33 having a well-known and commonly used hook-shaped finger 35 in the conventional leaf cutter 41. The flow leaf chamber 30 may be partitioned by a partition wall 8 having a flow rate adjusting valve.

  In the present embodiment, the rotational speed of the rotary spindle 32 is set to about 37 r.p.m as an example, but is set and adjusted in a range of 28 to 41 r.p.m. The rotating main shaft 32 of the fluidized leaf punching chamber 30 is driven by a variable speed drive motor M2 installed on the discharge port 31 side. In the fluidized leaf chamber 30, for example, tea leaves A having a moisture content of 310 to 320% are dried to a moisture content of about 250% on the basis of dry weight. Both ends of the rotation main shafts 22 and 32 of the fixed drum processing chamber 20 and the fluidized leaf punching chamber 30 are respectively supported by the bearing 10, and the ends of the two rotation main shafts 22 and 32 near the center of the drying drum 2. The part is supported by a bearing 10 and covered with a housing 11 as shown in the enlarged view of FIG.

  A moisture measuring device 7B that samples the tea leaves A in the fluidized leaf punching chamber 30 at this position and measures the moisture value is provided at the end position of the fluidized leaf punching chamber 30 of the front management door 5. The specific configuration of the moisture measuring device 7B is the same as that of the moisture measuring device 7F of the fixed barrel processing chamber 20.

An example of the compound steamed leaf dryer 1 of the present invention has the above-described specific form, and this operation mode will be described below.
(1) Installation state Since the conventional fixed barrel processor 40 and the leaf cutter 41 are integrated, the installation state is very compact and requires less installation space than installing two separate devices. That's it.

(2) Fixed barrel processing chamber In the fixed barrel processing chamber 20, the tea leaves A steamed by the steamer are received, the tea leaves A are picked up by the leaf crusher 23, and left to loosen up the lump of the tea leaves A. Promotes drying. In the present embodiment, the rotational speed of the rotary spindle 22 is set to about 22 rpm as an example.

  As a feature of the present embodiment, the tilting plate 25A is set at the same angle as the other left and right fixed fingers 25 as shown in FIG. However, when it is rotated and positioned above the dry drum 2, it rotates as shown in FIG. Further, the tea leaves A sandwiched between the tilting plate 25A and the left and right fixed fingers 25 are also dropped when the tilting plate 25A tilts. Therefore, since the force to shake off the tea leaves A is strong, the tea leaves A containing a lot of moisture do not adhere to the wiper 24.

The auxiliary plate 25B located on the back side of the tilting plate 25A scoops up the tea leaves A scooped by the tilting plate 25A following the tilting plate 25A. Further, for example, even when the tea leaves A are tilted when scooping up and cannot be scooped up well, the tea leaves A can be scooped up.
Also, the tea leaves A that have moved to the end of the fixed barrel processing chamber 20 are transferred little by little from the gap of the flow control intermediate valve 9 that is opened when being scraped up by the leaf plate 23 to the flowing leaf punching chamber 30. In the fixed barrel processing chamber 20, the tea leaf A having a moisture content of 360% is dried to a moisture content of 320 to 310% according to the dry standard.

  Further, the tea leaves A that have moved to the vicinity of the terminal end of the fixed barrel processing chamber 20 fall into the tea leaf accommodating section 70 of the moisture measuring device 7F when being picked up by the leaf crusher 23, and are sampled. The sampled tea leaves A are returned to the cocoon drying drum 2 after the moisture content is measured. After the moisture content is measured, the controller C compares the moisture content with a target moisture content set in advance, and controls the amount of hot air, the number of revolutions of the rotary spindle 22, the amount of opening of the flow control intermediate valve 9, and the like.

(3) Fluidized leaf punching chamber In the fluidized leaf punching chamber 30, the tea leaves A dried in the fixed barrel processing chamber 20 are received and diffused and exposed to hot air while the lump of tea leaves A is unraveled by the leaf crusher 33. As a result, the tea leaves A are squeezed by the hand 36. As an example, the rotation speed of the rotation main shaft 32 is set to about 37 rpm.
Further, the tea leaves A that have moved to the end of the fluidized leaf punching chamber 30 are discharged little by little from the gap of the discharge valve 37 that is opened when the tea leaves 33 are lifted up by the leaf sander 33. The tea leaf A having a moisture content of 320 to 310% in terms of the dry weight in the flowing leaf chamber 30 has a moisture content of about 250%.

Further, the tea leaves A that have moved to the vicinity of the end of the fluidized leaf punching chamber 30 are dropped into the tea leaf accommodating section 70 of the moisture measuring device 7B when being picked up by the leaf cutter 33 and sampled. The sampled tea leaves A are returned to the cocoon drying drum 2 after the moisture content is measured.
After the moisture content is measured, it is compared with the target moisture content set in advance by the control device C, and the amount of hot air, the number of revolutions of the rotating spindle 32, the amount of opening of the flow control intermediate valve 9, and the amount of opening of the discharge valve 37 are compared. Are controlled.

  As described above, the tea leaves A are taken into and taken out from the lower positions of the left and right side plates of the kite drying drum 2 with respect to the present apparatus, so that the cleaning is easy and can be carried out well.

It is the longitudinal cross-sectional front view and partial enlarged view which show the compound steamed leaf processing dryer of this invention. They are a top view (a), left side view (b), and right side view (c). It is a front view which shows the leaf roughness (a) provided in a fixed trunk | drum processing chamber, and the leaf roughness (b) provided in a fluidized leaf punching chamber, respectively. It is a side view which shows the difference (a) and (b) of the effect | action with respect to a tea leaf by the rotation position of the leaf roughness provided in a fixed cylinder processing chamber. It is a front view which shows typically the conventional air drying line which combined the fixed cylinder processing machine and the leaf cutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compound steamed leaf processing dryer 2 Straw drying drum 3 Lower trunk 3a Duc plate 4 Upper trunk 5 Front management door 6 Hot air guide 7B Moisture measuring device 7F Moisture measuring device 8 Partition wall 9 Flow control intermediate valve 9a Rotating shaft 10 Bearing 11 Housing 20 Fixed barrel processing chamber 21 Input port 22 Rotating main shaft 23 Leaf crush 24 Fraying hand 25 Finger 25A Tilting plate 25B Tilting plate 25B Auxiliary plate 30 Flowing leaf punching chamber 31 Discharge port 32 Rotating main shaft 33 Leaf crushing 34 Wrapping hand 35 Finger 36 37 Discharge valve 37a Rotating shaft 40 Fixed barrel processor 41 Leaf cutter 42 Vertical bucket conveyor 70 Tea leaf accommodating portion 71 Return cylinder 72 Return plate A Tea leaf B Vibratory conveyor C Controller M1 Drive motor M2 Drive motor α Bending angle of auxiliary plate

Claims (5)

  The inside of the drying chamber is divided into two chambers, and each drying chamber is provided with a rotating spindle that is driven independently, and the upstream drying chamber is attached to a plurality of leaf blades on the rotating spindle. The rotation speed of the rotation main shaft is set to 15 to 28 rpm, and the drying chamber on the downstream side includes a plurality of leaf ridges and claws or only leaf ridges with respect to the rotation main shaft. A combined steamed leaf dryer having a fluidized leaf punching chamber in which the rotational speed of the rotating spindle is set to 28 to 41 rpm.   The combined steamed leaf processing dryer according to claim 1, wherein a partition wall is provided between the fixed barrel processing chamber and the fluidized leaf punching chamber, and a flow rate control intermediate valve for controlling the flow rate is provided.   3. At least one finger of the wiper at the tip of the leaf blade of the fixed cylinder processing chamber has a blade shape and is configured to be tiltable in the rotation direction. The combined steamed leaf processing dryer described.   4. The compound steamed leaf dryer according to claim 3, wherein a blade-shaped finger is bent and fixed at a back side of the tiltable finger at a predetermined angle on the opposite side in the rotational direction. .   A moisture measuring device that samples the tea leaves in the fixed barrel processing chamber and the tea leaves in the fluidized leaf punching chamber to measure moisture is provided on the dry drum facing the fixed barrel processing chamber and the fluidized leaf punching chamber. A control device for controlling the amount of hot air supplied based on the value, the number of rotations of each rotary main shaft, the amount of opening of the flow control intermediate valve, or the amount of opening of the discharge valve for discharging tea leaves at the end of the flow leaf punching chamber The combined steamed-leaf processing dryer according to claim 1, 2, 3 or 4, wherein

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