JP2012122836A - Moisture measurement apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture measurement apparatus which is capable of coping with grains having different grain sizes and can be outfitted on a grain drier used for drying a plurality of types of grains.SOLUTION: A moisture measurement apparatus 1 has an inlet part opening/closing device 5 which has: a cover 6 forming an inlet part 50 allowing one grain K having a large grain size to pass at a time; and a cover movable part 7 for reducing the aperture area of the inlet part 50. The cover 6 has an inlet-forming curved part which forms the inlet part 50 on its lower edge at the center in the right/left direction. The cover movable part 7 is constructed by supporting a movable part body 71 on the cover 6 with a rotating shaft and opens and closes the movable part body 71 in accordance with rotation of the rotating shaft. The movable part body 71 has a passage restriction part 71b on its lower edge at the center in the right/left direction. The passage restriction part 71b reduces the aperture area of the inlet part 50 when the cover movable part 7 is closed to allow one grain K having a small grain size to pass at a time.

Description

  The present invention relates to a moisture measuring device that supplies grain to a measuring unit through an inlet and measures a moisture value.

  There are two types of moisture measuring devices: one for multiple grains that are crushed by a roll and measured the moisture value at once (Patent Document 2), and one grain that is crushed by a roll and measured the moisture value one by one (Patent Document) 1). The moisture measuring device for multiple grains can be used for grains with small grains such as rice and wheat and grains with large grains such as soybeans. The accuracy is poor. On the other hand, the moisture measuring device for single grains measures the amount of each grain, so that the variation in the moisture value is known and the accuracy is high. It is not possible to handle large grains such as

JP-A-2005-77212 JP 2002-228614 A

  Therefore, in order to measure the moisture value of grains with large grains, it is necessary to prepare a moisture measuring device for multiple grains that can measure the moisture value of grains with large grains in addition to the moisture measuring device for single grains. was there.

  This invention is made | formed in view of such a subject, and it aims at providing the moisture measuring apparatus which can solve the said subject.

In order to achieve such an object, the moisture measuring device of the present invention is a moisture measuring device for a grain dryer that can be used for drying a plurality of types of grains, and is larger than the grain size of the large grain. A cover formed with an inlet portion having a slightly larger passage diameter, a cover movable portion that makes the passage diameter of the inlet portion larger than the grain size of the small grain and smaller than the grain size of the large grain, and the outer periphery A pair of supply screws each having a conveying groove on a surface thereof, and the cover includes curved relief portions having a radius of curvature slightly larger than an outer diameter of the supply screw on both sides of the inlet portion. It is characterized by.
In the invention, it is preferable that the cover movable portion is configured by supporting a movable portion main body on the cover with a rotating shaft, and has a radius of curvature slightly larger than an outer diameter of the supply screw, A pair of relief portions overlapped with each other, and a passage restriction portion provided between the relief portions and disposed between the inlet portion and the outer peripheral surface of the supply screw, together with the rotating shaft The movable part main body rotates to reduce the opening area of the inlet part.

  According to the present invention, in the state where the cover is not covered with the cover movable part, large grains can be passed through the inlet part by grain, but a large number of small grains pass through the inlet part at a time and are single grains. Measurement may not be possible. On the other hand, when the cover is covered with the cover movable portion, the entrance portion is narrowed, and small grains can pass through the entrance portion one by one. Therefore, according to the moisture measuring device according to the present invention, a single moisture measuring device can measure both large and small grains.

It is front sectional drawing which shows the grain dryer of one Embodiment of this invention. It is a figure which shows the moisture measuring apparatus with which a grain dryer is equipped, (a) is a perspective view which shows the whole structure in the state which closed the cover movable part, (b) is the enlarged front view. It is a figure which shows the moisture measuring apparatus with which a grain dryer is equipped, (a) is a perspective view which shows the whole structure in the state which opened the cover movable part, (b) is the enlarged front view. It is sectional drawing which shows the state in which the moisture measuring apparatus was attached to the elevator of the grain dryer. It is a front view which shows the partition cover with which a moisture measuring apparatus is provided. It is a figure which shows the inlet part opening / closing apparatus with which a moisture measuring apparatus is provided, (a) is a front perspective view in the state which closed the cover movable part, (b) is the back perspective view. It is a figure which shows the inlet part opening / closing apparatus with which a moisture measuring apparatus is provided, (a) is a front perspective view in the state which opened the cover movable part, (b) is the back perspective view.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
As shown in FIG. 1, the grain dryer 2 of the present embodiment is a grain dryer that can be used for drying a plurality of types of grains such as rice, wheat, soybeans, buckwheat, etc., and drying is performed for each type of grain. Done. The grain dryer 2 includes a grain tank 21 in the upper part of the machine body 2A having a rectangular parallelepiped box shape, and a pair of exhaust duct bulkheads 22 inclined downward in a funnel shape toward the center in the width direction. Yes. Inside the exhaust passage partition 22, a wind tunnel plate 23 constituting the air passage 23 a and a pair of air guide passage partitions 24 constituting the air guide passage 24 a on both sides in the width direction of the air passage 23 a are provided. Yes.

  Between the wind tunnel plate 23, the air guide partition 24 and the exhaust channel partition 22, there is a grain flow path 25 through which the grain K stored in the grain tank 21 flows down. The air passage 23a and the air guide passage 24a are supplied with ambient air at the time of tension operation, circulation operation, or discharge operation, and hot air generated by a burner (not shown) during the drying operation. The air is blown into the grain downflow passage 25 through openings formed in the wind tunnel plate 23 and the air guide passage partition wall 24.

  Below the exhaust passage partition wall 22, a pair of extension flow plates 26 extend downwardly in a funnel shape toward the center in the width direction of the machine body 2 </ b> A. The lower end of the grain flow path 25 is opened and closed during rotation, drying, and discharge operations as the shutter drum 27 rotates, and the grain K in the grain flow path 25 is discharged into the lower screw conveyor 29.

  The grain K is stretched from the tension hopper 28 opened on the side surface in the width direction of the machine body 2A to the machine body 2A during the tension operation. When the grain K stretched from the stretcher hopper 28 flows into the lower transport bar 29a of the lower screw conveyor 29 from between the lower ends of the stretcher plate 26, the lower screw 29b passes the lower transport bar 29a outside the machine body 2A. It is conveyed to the lower part of the elevator 30 standing upright.

  In the elevator 30, an endless belt 30 b to which buckets 30 a are attached at regular intervals rotates during each operation of stretching, circulation, drying, and discharging, and the grain K conveyed to the lower part of the elevator 30 is stored in the bucket 30 a. After being lifted and conveyed to the upper end, it is caused to flow down to the upper conveying rod 31a of the upper screw conveyor 31.

  When the grain K is conveyed in the upper conveying basket 31a with the upper screw 31b, it flows down to the upper surface of the leveling machine 32 at the center of the grain dryer 2 in the front-rear direction, and the grain tank is rotated by the centrifugal force of the rotating classifier 32 21 evenly dissipated and distributed. At the time of the discharging operation, one end of the upper conveying basket 31a is communicated with a discharging pipe (not shown), and the grain K flowing down to the upper conveying basket 31a is discharged from the grain dryer 2 through the discharging pipe.

  As shown in FIG. 4, the moisture measuring device 1 is attached to the side plate of the elevator 30. The moisture measuring device 1 is for measuring the moisture value of the grain K. As shown in FIGS. 2 and 3, a pair of supply screws 14 having a conveying groove 14 a on the outer peripheral surface are provided in the mounting frame 11. Are arranged side by side. The moisture measuring apparatus 1 has an opening 30c that is inserted into the pair of rails (not shown) provided on the side plate of the elevator 30 and the left and right edges of the mounting frame 11 and is open to the side plate located between the rails. The attachment frame 11 is screwed to the side plate so as to cover it.

  As shown in FIG. 4, the moisture measuring device 1 attached to the elevator 30 has the tip of the supply screw 14 so that the grain K dropped from the bucket 30 a during the upward conveyance is accumulated on the outer peripheral surfaces of both supply screws 14. Is positioned in the vicinity of the elevator 30 toward the opening 30c. Grain K collected on the outer peripheral surfaces of both supply screws 14 is accommodated in a conveying groove 14a on the outer peripheral surface of the supply screw 14, and the supply screw 14 is driven by a drive device accommodated in the apparatus main body 12 (see FIGS. 2 and 3). As it rotates, it moves backward in the conveying groove 14a.

  As shown in FIGS. 2 to 4, a partition cover 13 is attached to the inner surface of the attachment frame 11. The supply screw 14 extends forward of the partition cover 13 through a through hole 13 a formed in the partition cover 13. As shown in FIG. 5, the through-hole 13a is provided with an insertion portion 13a1 through which the supply screw 14 is inserted side by side, and a passage portion 13a2 for the grain K conveyed by the supply screw 14 between the insertion portions 13a1. Is provided. The grain conveyed by the supply screw 14 moves to the rear (back) side of the partition cover 13 through the passage portion 13 a 2, and then a pair of electrode rolls 9 arranged side by side below the supply screw 14. It is dropped on the outer peripheral surface. The grain K dropped on the outer peripheral surface of the electrode roll 9 is sandwiched between the electrode rolls 9 rotated by a driving device housed in the apparatus main body 12 and crushed, and the electrical resistance value is measured for each grain. . Then, the electrical resistance value is converted into a moisture value for each grain, and the average moisture value and variation of the grains stuck to the drying device are calculated by statistical processing.

  As shown in FIGS. 2 and 3, an entrance opening / closing device 5 for changing the opening area of the entrance 50 of the grain K to the passage 13 a 2 is provided on the upper portion of the partition cover 13. The inlet part opening / closing device 5 is for changing the opening area of the inlet part 50 in accordance with the size of the grain whose moisture value is measured so that it can cope with grains having different sizes. A cover 6 that is installed at the top and forms the entrance 50 to the passage 13a2 and a movable cover 7 for reducing the opening area of the entrance 50 are provided.

  As shown in FIGS. 6 and 7, the cover 6 is configured by extending side plates 62 rearward from the left and right side edges of the cover body 61. The cover body 61 includes a pair of screw holes 61a for screwing to the partition cover 13 in the upper edge portion, and includes an inlet forming curved portion 61d that forms the inlet portion 50 in the central portion in the left-right direction of the lower edge. The inlet portion 50 formed by the inlet forming curved portion 61d has a passage diameter slightly larger than the particle size of the large grain. That is, the entrance 50 is formed in a size that allows large grains to pass through one by one.

  On the lower edges of the cover main body 61 located on the left and right sides of the entrance forming curved portion 61d, curved escape portions 61b for avoiding interference with the supply screw 14 are provided. The curved relief portion 61 b has a radius of curvature that is slightly larger than the outer diameter of the supply screw 14. From the lower edges of both curved relief portions 61b, slits 61c for avoiding interference with a side plate 72 of the movable portion main body 71 described later extend upward. Each slit 61c is disposed on the left and right sides of the entrance forming curved portion 61d so as to sandwich the entrance forming curved portion 61d.

  The cover movable portion 7 includes a movable portion main body 71 for reducing the opening area of the inlet portion 50 and a rotating shaft 81 that rotatably supports the movable portion main body 71 on the cover 6.

  The movable part main body 71 is provided with escape parts 71a for avoiding interference with the supply screw 14 on both left and right side parts of the lower edge, and is located between the two escape parts 71a and extends in the horizontal direction. The portion forms a passage restricting portion 71b that reduces the opening area of the inlet portion 50 and prevents passage of large grains. The escape portion 71a has a radius of curvature that is slightly larger than the outer diameter of the supply screw 14, and overlaps with the curved escape portion 61b when the cover movable portion 7 is closed. The passage restricting portion 71 b is disposed between the inlet portion 50 and the outer peripheral surface of the supply screw 14 with the cover movable portion 7 closed. Both escape portions 71a are formed so that a gap that allows small grains to pass through is formed between the tip of the passage restricting portion 71b and the outer peripheral surface of the supply screw 14 with the cover movable portion 7 closed. It extends downward between. The gap has a passage diameter that is larger than the grain size of the small grain and smaller than the grain size of the large grain. That is, when the cover movable part 7 is closed and the tip of the passage restricting part 71b moves to the lower limit, the passage diameter of the inlet part 50 is formed such that small grains pass through one grain at a time.

  Side plates 72 having insertion holes 72 a extend rearward from the left and right side edges of the movable portion main body 71. The rotation shaft 81 is inserted into the insertion hole 72 a and fixed to the movable portion main body 71, and is inserted into the insertion holes 62 a provided on the left and right side plates 62 of the cover 6 and is rotatably supported by the cover 6. .

  A rotation operation lever 82 is fixed to the right end of the rotation shaft 81 extending rightward from the right side plate 62 of the cover movable portion 7. The rotation operation lever 82 has a base end portion fixed to the rotation shaft 81, and a fixing screw 83 for fixing the rotation position of the rotation operation lever 82 is attached to the distal end portion. The fixing screw 83 is screwed into a screw hole 12 a (see FIGS. 2 and 3) provided in the apparatus main body 12, thereby fixing the rotation position of the rotation operation lever 82 with respect to the apparatus main body 12.

  As shown in FIGS. 6A and 6B, in a state where the rotation operation lever 82 is rotated downward, the movable portion main body 71 is located at the closed position, and the passage restricting portion 71b of the cover movable portion 7 is covered with the cover. The inlet portion 50 formed by the six inlet forming curved portions 61d is covered from the front. As a result, as shown in FIGS. 2A and 2B, the entrance 50 has a gap that allows the small grain K <b> 1 to pass therethrough so as to be formed between the outer peripheral surface of the supply screw 14. The opening area is reduced.

  As shown in FIGS. 7A and 7B, in a state where the rotation operation lever 82 is rotated upward, the movable portion main body 71 is located at the open position, and the passage restricting portion 71 b of the cover movable portion 7 is the cover 6. The entire inlet portion 50 formed by the inlet forming curved portion 61d is exposed forward. As a result, as shown in FIGS. 3A and 3B, the entrance 50 is formed with a gap that allows the large grain K2 to pass therethrough between the outer peripheral surface of the supply screw 14. Increase the opening area.

  The moisture measuring device 1 samples (collects) each grain, converts the electrical resistance value measured for each grain into a moisture value for each grain, and is attached to the drying device by statistical processing. The average moisture value and variation of the cereals are calculated, and the drying of the cereals in the grain dryer 2 is controlled based on the calculated average moisture value and variation.

  According to the present embodiment, by opening and closing the movable portion main body 71 to reduce or increase the opening area of the inlet portion 50, the inlet portion 50 having a size that matches the size of the grain whose moisture value is to be measured. It can be provided on the grain conveyance path by the supply screw 14. That is, when measuring the moisture value of small grains, the movable part main body 71 is positioned in the closed position, the opening area of the inlet 50 is reduced, and small grains are passed through the inlet 50 one by one. When measuring the moisture value of the grain, the movable portion main body 71 is positioned at the open position, and the opening area of the inlet portion 50 can be increased to allow large grains to pass through the inlet portion 50 one by one. Accordingly, the moisture measurement of large grains and the moisture value of small grains can be accurately measured with a single moisture measuring device 1.

  In the above embodiment, the case where the cover movable part 7 includes one movable part main body 71 provided with the passage restricting part 71b has been described. However, a cover 6 for forming the inlet portion 50 for the medium grain is prepared separately by the entrance forming curved portion 61d, and the cover 6 for the large grain or the cover for the medium grain is selected according to the grain size of the grain whose moisture is to be measured. 6 is recombined and attached to the partition cover 13 so that the moisture measuring device 1 can measure either the moisture measurement of large grains and small grains or the moisture measurement of medium grains and small grains. Good.

  In addition, the size of the entrance 50 can be adjusted according to the opening area of the entrance 50 that changes depending on the rotation angle of the rotary shaft 81, and 2 out of combinations of multiple types of grains having different grain sizes. Any kind of grain may be passed through the inlet 50 one by one. Further, the cover movable portion 7 may be configured to slide to change the opening area of the inlet portion 50. In the above-described embodiment, the case where the movable portion main body 71 is opened and closed by manually operating the rotation operation lever 82 has been described. However, when the operator operates the operation portion, driving means such as a motor is movable. The part main body 71 may be rotated. For example, when the operation unit provided in the moisture measuring device 1 is operated, the driving unit may rotate the movable unit main body 71. In addition, when the operator operates the operation unit provided in the grain dryer 2, the type of grain to be dried is selected, and the driving means is movable according to the grain size of the selected grain. The part main body 71 may be rotated. Alternatively, the position of the movable part main body 71 may be detected by a position detection sensor, and the movable part main body 71 may be automatically rotated according to the grain K to be dried.

  In the said embodiment, the case where the passage control part 71b which prevents passage of a large grain was formed in the center part of the left-right direction which was located between the right-and-left escape parts 71a and extended below was demonstrated. However, if the opening area of the inlet portion 50 can be reduced so that a gap that allows small grains to pass therethrough is formed between the outer peripheral surface of the supply screw 14 and the shape of the passage restricting portion 71b. Is arbitrary, and for example, the lower edge of the passage restricting portion 71b may be curved similarly to the entrance forming curved portion 61d. Moreover, the support method and support position of the movable part main body 71 to the cover 6 are also arbitrary.

DESCRIPTION OF SYMBOLS 1 Moisture measuring apparatus 11 Mounting frame 12 Apparatus main body 12a Screw hole 13 Partition cover 13a Through hole 13a1 Insertion part 13a2 Passing part 14 Feed screw 14a Grain dryer 2A Machine body 21 Grain tank 22 Drainage path partition wall 23 Wind tunnel plate 23a Air passage 24 Air guide passage partition wall 24a Air guide passage 25 Grain flow down passage 26 Stretching plate 27 Shutter drum 28 Tightening hopper 29 Lower screw conveyor 29a Lower conveying rod 29b Lower screw 30 Elevator 30a Bucket 30b Endless belt 30c Opening 31 Upper screw conveyor 31a Upper conveying rod 31b Upper screw 32 Grader 5 Inlet portion opening / closing device 50 Inlet portion 6 Cover 61 Cover body 61a Screw hole 61b Curved relief portion 61c Slit 61d Inlet formation curved portion 62 Side plate 62a Insertion hole 7 Cover movable portion 71 Movable part main body 71a escape part 71b Excessive restriction portion 72 side plate 72a insertion hole 81 rotating shaft 82 rotates the operating lever 83 fixing screw 9 electrode rolls (measuring section)
K grain K1 small grain K2 large grain

Claims (2)

A moisture measuring device for a grain dryer, which can be used for drying a plurality of types of grains,
A cover formed with an inlet having a passage diameter slightly larger than the grain size of the large grain,
A movable cover portion that has a passage diameter of the inlet portion larger than the grain size of the small grain and smaller than the grain size of the large grain;
A pair of supply screws provided with conveying grooves on the outer peripheral surface;
The moisture measuring apparatus according to claim 1, wherein the cover includes curved relief portions having a radius of curvature slightly larger than an outer diameter of the supply screw on both sides of the inlet portion. The cover movable part is configured by supporting the movable part main body on the cover with a rotation shaft,
A pair of relief portions that have a radius of curvature slightly larger than the outer diameter of the supply screw and are superimposed on the curved relief portion;
A passage restricting portion provided between the relief portion and disposed between the inlet portion and an outer peripheral surface of the supply screw, and the movable portion main body rotates together with the rotation shaft, thereby the inlet portion. The moisture measuring device according to claim 1, wherein the opening area of the water is reduced.

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