JPH0480320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an upper spiral gutter dust removal device in a grain circulation drying device.

(Prior Art) Conventionally, a humidity control tank is provided at an upper position, a down-flow type grain drying chamber is connected to a lower position of the tank, and after supplying unhulled rice to the tank, the drying process is performed between the tank and the drying chamber. A grain circulation drying apparatus is well known which is provided with an elevator that also serves as a supply circulation for circulating drying, and an upper spiral gutter for distributed supply provided above the tank.

Furthermore, the conventionally known Japanese Utility Model Application Publication No. 57-137966 describes a dryer in which a dust suction fan is attached to the upper spiral gutter of the well-known dryer.

Furthermore, the conventionally known Japanese Utility Model Publication No. 55-114464 describes a fan in which clogging is removed by reversing the fan.

(Problems to be Solved by the Invention) Among the above-mentioned known examples, the one described in Japanese Utility Model Application Laid-Open No. 55-114464 removes clogging by reversing the fan; Although it can be used to remove clogs in the condenser and fan as in the example, it cannot be applied to remove dust and residual rice in the upper spiral gutter of a grain circulation drying device as in the present invention. In grain drying equipment,
Since both dust and residual rice must be removed, it is not possible to simply reverse the fan.

(Means for Solving the Problems) Therefore, the present invention provides a humidity control tank 4 at an upper position.
, a down-flow type grain drying chamber 5 connected to the lower part of the tank 4, a supply circulation elevator 12 that supplies unhulled rice to the tank 4 and the drying chamber 5, and then circulates and dries it, and the humidity control In the grain circulation drying device, the grain circulation drying device is provided with an upper spiral gutter 15 for distributing and dropping grain discharged from the elevator 12 horizontally installed above the storage tank 4 into the tank 4.
5, an air path for removing dust by suctioning the inside of the upper spiral gutter 15, and an air path for removing dust by suctioning the inside of the upper spiral gutter 15, so that dust and residual rice can be removed by changing the air path, although the direction of rotation of the fan is constant. Dust removal and residue in the upper spiral gutter in a grain circulation drying device equipped with an air path that can blow residual rice into the gutter 15, a fan 22 whose rotation direction is constant, and a switching mechanism for the air path. This is a rice removal device.

(Example) An example will be described with reference to the drawings. Reference numeral 1 indicates an upper humidity control section, 2 indicates a drying section below the humidity control section 1, and 3 indicates a grain collection section below the humidity control section.

Inside the humidity control section 1 is mainly a humidity control tank 4, which is formed into a rectangular empty chamber using a thin iron plate. The drying section 2 is provided with a down-flow type grain drying chamber 5, and both side walls of the drying chamber 5 are formed of nets or perforated plates 6, 6, and a hot air supply chamber 7 is provided on one side of the drying chamber 5, and a hot air supply chamber 7 is provided on the other side. There is a hot air exhaust room 8.
is formed, and the upper end of the drying chamber 5 is connected to the lower end of the humidity control tank 4. The grain collecting section 3 includes:
A rotary valve 9 and a V-shaped gutter 10 are provided. The V-shaped receiving gutter 10 of the embodiment is located directly below the hot air exhaust chamber 8, and is disposed on one side when viewed as a whole. Applicable V
The mold receiving trough 10 slopes lower toward the center, and a take-out spiral conveyor 11 is installed horizontally at the upper center.

An elevator 12 is vertically erected on the side of the machine body, and connects the discharge end of the take-out spiral conveyor 11 to the lower end of the elevator 12. 12a is a supply hopper. A discharge gutter 13 at the upper end of the elevator 12 is connected to a supply section of an upper spiral gutter 15 in which an upper conveyor 14 is installed, and the upper conveyor 14 supplies grain to the humidity control tank 4 .

A blower mechanism 16 is attached to one end of the upper spiral gutter 15. The blowing mechanism 16 includes a fan case 17
, a motor 18, an intake case 19, etc.

The intake case 19 is superimposed on the upper opening 20 of the upper spiral gutter 15. Further, the fan case 17 and the intake case 19 are communicated through a dust suction port 21.

A fan 22 is disposed inside the fan case 17, and the fan 22 is driven by the motor 18.

Further, an opening window 23 is formed on the opposite side of the dust suction port 21 of the intake case 19, and a switching valve 24 is attached to the opening window 23.
As shown in the figure, the lower edge is attached by a hinge 25, and when the switching valve 24 is placed vertically, the opening window 23 is closed (Fig. 5A), and the switching valve 24 is rotated inward in the horizontal direction. When this happens, the upper surface opening 20 is closed (FIG. 5B).

A dust exhaust port 26 is formed in the peripheral wall of the fan case 17 of the blower mechanism 16, and a dust exhaust duct 27 is connected to the dust exhaust port 26. The dust exhaust port 26 and the dust exhaust duct 27 are provided along with the upper spiral gutter 15, and form a communication window 28 communicating from the fan case 17 into the upper spiral gutter 15, as shown in FIG. 5B.

A rotatable switching valve 29 is attached to the communication window 28. When the switching valve 29 rotates around the shaft mounting portion 30, it closes the communication window 28 and closes the dust exhaust port 26.

When the communication window 28 is closed by the switching valve 29 and the opening window 23 is closed by the switching valve 24, as shown in FIG. Flow within 27 days. When the communication window 28 is opened by the switching valve 29 and the dust exhaust port 26 is closed, and the opening window 23 is opened by the switching valve 24, outside air is transferred to the upper spiral gutter 15 as shown in FIG.
Send it inside with fan 22.

The elevator 12 and the supply side of the upper spiral gutter 15 are connected by a discharge gutter 13, and a discharge part 3 is located on the bottom of the part where the discharge gutter 13 is attached on one side of the upper spiral gutter 15.
Attach the residual rice discharge funnel 32 to 1. 33 is the residual rice discharge shutter.

The residual rice discharge shutter 33 is attached to the discharge part 31 so as to be slidable in the horizontal direction, and one end of a spring 34 is attached to one side of the residual rice discharge shutter 33, and the other end of the spring 34 is attached to the humidity control tank. It is locked to a tongue piece 36 protruding from one side of the ceiling part 35 of No. 4.

An L-shaped ejection lever locking member 37 is attached to one side of the lower part of the elevator 12, and the ejection lever locking member 3
A vertical groove 38 is bored in one side of the groove 7, and hook grooves a and b are provided above and below the vertical groove 38. A discharge lever 39 is fitted into the vertical groove 38 so as to be vertically slidable, and one end of the discharge lever 39 is pivoted 40 to the L-shaped discharge lever locking member 37 .

Two wires 41 and 42 and one discharge rope 43 are respectively locked to the discharge lever 39, and the other end of the wire 41 is connected to an L-shaped rod 44 attached to one end of the shaft attachment part 25 of the switching valve 24. , the other end of the wire 42 is fixed to an L-shaped rod 45 attached to the upper end of the shaft attachment part 30 of the switching valve 29.

Further, the discharge rope 43 passes around a guide pulley 46 provided on one side of the upper part of the elevator 12, and then is fixed to the side opposite to the side on which the spring 34 of the residual rice discharge shutter 33 is attached.

The ejection lever 39 is connected to a hook groove a provided in the vertical groove 38 of the L-shaped ejection lever locking member 37.
When it is locked, the opening window 23 is closed by the switching valve 24, the residual rice discharge shutter 33 of the discharge part 31 of the discharge funnel 32 is closed, and the communication window 28 is closed by the switching valve 29. When the discharge lever 39 is locked in the hook groove b provided in the vertical groove 38 of the L-shaped discharge lever locking member 37, the opening window 23 is opened by the switching valve 24, and the discharge funnel 32 is discharged. The residual rice discharge shutter 33 of the section 31 is opened, and the communication window 28 is opened by the switching valve 29.

Note that 47 is a burner and 48 is a suction fan.

(effect) Next, we will discuss the effect.

When undried rice is supplied to the supply hopper 12 a of the elevator 12 , it rises inside the elevator 12 , flows into the upper spiral trough 15 from the discharge trough 13 , is conveyed by the upper spiral conveyor 14 , and enters the humidity control tank 4 . The grain is supplied into the downflow type grain drying chamber 5.

Then, the burner 47 is ignited, and the suction fan 48
When rotated, the hot air is blown from the hot air supply chamber 7 through the down-flow type grain drying chamber 5 to the hot air exhaust chamber 8, and the hot air is sprayed onto the unhulled rice in the down-flow type grain drying chamber 5 to dry the skin.

Next, when the rotary valve 9 is rotated at a constant cycle, the unhulled rice with the dry skin is fed out little by little by the rotation of the rotary valve 9 and discharged onto the V-shaped receiving trough 10, where it is transported laterally by the take-out spiral conveyor 11. It flows into the lower end of the elevator 12, rises inside the elevator 12, and is piled on top of the unhulled rice in the humidity control tank 4. When paddy rice is piled up one after another, the paddy rice piled up in advance becomes
The grain gradually flows down and flows into the down-flow type grain drying chamber 5 again, undergoes second drying, and is again stacked in the humidity control tank 4.

When this drying is repeated about 4 to 6 times, the humidity control drying is completed.

When the humidity control and drying process is completed, a large amount of dust and residual rice accumulates in the upper spiral gutter 15, so the inside of the upper spiral gutter 15 is cleaned to remove the dust and residual rice, and the method is as follows. It is.

The ejection lever 39 is connected to the L-shaped ejection lever locking member 3.
7, the residual rice discharge shutter 33 of the discharge section 31 is closed, the opening window 23 is closed, the top opening 20 is open, and the switching valve 29 is connected to the communication window 28. is closed, and the dust exhaust port 26 is opened. Therefore, when the fan 22 in the fan case 17 of the ventilation mechanism 16 is rotated by the motor 18,
Paddy and dust in the upper spiral gutter 15 are sucked into the dust exhaust duct 27 through the upper surface opening 20 and the dust exhaust port 26.
It is discharged further outside.

Next, when the ejection lever 39 is engaged with the hook groove b of the vertical groove 38 formed in the L-shaped ejection lever locking member 37, the residual rice ejection shutter 33 of the ejection section 31 is opened, and the opening window 23 is opened. , the top opening 20 is closed, the switching valve 29 opens the communication window 28, and the dust exhaust port 26 is closed. Therefore, when the fan 22 in the fan case 17 of the blower mechanism 16 is rotated by the motor 18,
Outside air is absorbed through the opening window 23, blown into the upper spiral gutter 15 through the communication window 28, blows off the residual rice accumulated in the upper spiral gutter 15, and passes through the residual rice discharge funnel 32 from the residual rice discharge section 31. It falls and is ejected.

(Effect) Among the above-mentioned known examples, the one described in Japanese Utility Model Application Publication No. 55-114464 removes clogging by reversing the fan, but this is different from the condenser as in the known example. However, it cannot be applied to remove dust and residual rice in the upper spiral gutter of a grain circulation dryer, as in the present invention. In grain drying equipment,
Since both dust and residual rice must be removed, it is not possible to simply reverse the fan.

However, the present invention provides a humidity control tank 4 located at an upper position, a downstream type grain drying chamber 5 connected to a lower position of the tank 4, and supplying unhulled rice to the tank 4 and the drying chamber 5 and then circulating it. This grain circulation drying device is equipped with a supply circulation elevator 12 for drying the grains, and an upper spiral gutter 15 for dispersing and dropping grains discharged from the elevator 12 installed horizontally above the humidity control tank 4 into the tank 4. In the upper spiral gutter 15, there is an air passage for removing dust by suctioning the inside of the upper spiral gutter 15 so that dust and residual rice can be removed by changing the direction of rotation of the fan although the direction of rotation of the fan is constant. In the upper spiral gutter of a grain circulation drying device, the grain circulation drying device is provided with: an air path capable of blowing residual rice into the upper spiral gutter 15; a fan 22 whose rotation direction is constant; and a switching mechanism for the air path. Therefore, as mentioned above, the dust and residual rice removal in the upper spiral gutter 15 is carried out by keeping the rotating direction of the fan 22 constant.
In particular, since the air path of the fan 22 is switched,
Even the difficult removal of residual rice can be reliably carried out. Further, since a reversing mechanism for the fan 22 is unnecessary, the motor is inexpensive, switching wiring and a switch mechanism are also unnecessary, and there are no malfunctions due to poor contact, etc., and the entire structure can be made inexpensive and robust.

[Brief explanation of the drawing]

Figure 1 is a longitudinal front view, Figure 2 is a perspective view of the main parts,
A plan view, FIG. 3 is a perspective view of the upper spiral gutter, FIG. 4 is a rear perspective view of the ventilation mechanism, FIG. 5 is a plan sectional view of the ventilation mechanism, FIG. 6 is a front view, and FIG. 7 is an operating state. FIG. Explanation of symbols, 1...Humidity control section, 2...Drying section, 3
... Grain collecting section, 4 ... Humidity control tank, 5 ... Downstream grain drying room, 6 ... Perforated plate, 7 ... Hot air supply room,
8...Hot air exhaust chamber, 9...Rotary valve, 10...
V-shaped receiving gutter, 11... Take-out spiral conveyor, 12...
Elevator, 12a... Supply hopper, 13... Discharge gutter, 14... Upper spiral conveyor, 15... Upper spiral gutter, 16... Air blower mechanism, 17... Fan case, 18... Motor, 19... Intake case , 20
...Top opening, 21...Dust suction port, 22...Fan, 23...Opening window, 24...Switching valve, 25...
Shaft mounting part, 26...dust exhaust port, 27...dust exhaust duct,
28...Communication window, 29...Switching valve, 30...Shaft attachment part, 31...Discharge part, 32...Remaining rice discharge funnel,
33...Residual rice discharge shutter, 34...Spring, 35...Ceiling part, 36...Tongue piece, 37...L
Ejection lever locking member in the shape of 38... vertical groove, 39...
...Ejection lever, 40... Pivot mounting, 41... Wire,
42...Wire, 43...Discharge rope, 44...
L-shaped rod, 45... L-shaped rod, 46... Guide pulley, 4
7... Burner, 48... Suction fan, a... Hook groove, b... Hook groove.

Claims (1)

[Claims] 1. A humidity control tank 4 at the upper position, a downstream type grain drying room 5 connected to the lower part of the tank 4, and a supply for supplying unhulled rice to the tank 4 and the drying room 5 and then circulating and drying it. Circulation elevator 12
In the grain circulation drying apparatus, the upper spiral gutter 15 is provided with an upper spiral gutter 15 for dispersing and dropping grain discharged from the elevator 12 horizontally installed above the humidity control tank 4 into the tank 4. Although the direction of rotation of the fan is constant, dust and residual rice can be removed by changing the air path. A device for removing dust and residual rice in an upper spiral gutter in a grain circulation drying device, which is provided with an air path capable of blowing residual rice away, a fan 22 whose rotation direction is constant, and a switching mechanism for the air path. .