JP2001033166A - Dust collector for grain dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable not only working atmosphere around a grain dryer to be the clean atmosphere, but normal operation and drying performance of the grain dryer to be maintained. SOLUTION: The dust collector 10 is provided with a pressure releasing cover 35 on a duct connection part 34 to which a blower side duct 36 connected to a grain dryer is connected. The pressure releasing cover 35 opens in the case where an inner pressure of the blower side duct 36 exceeds a specified value. As a result, even when filters and the like of the dust collector 10 are clogged, the inner pressure of the blower side duct 36 never increases extraordinarily, resulting in no decrease of blowing quantity of the grain dryer and allowing normal operation and drying performance of the grain dryer to be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a dust collector for a grain dryer.

[0002]

2. Description of the Related Art Conventionally, grain dryers have been used to dry grains such as rice. In such a conventional grain dryer, both the exhaust gas discharged from the blower and the exhaust gas discharged from the dust remover are directly discharged out of the grain dryer. For this reason, there has been a problem that dust is scattered to a work place around the grain dryer.

Therefore, the present applicant has already proposed a dust collector capable of removing dust in the exhaust gas discharged from such a grain dryer and discharging only the dust-removed exhaust gas to the outside (Japanese Patent Application No. Hei 10 (1999)). According to the proposed dust collector, the dust in the exhaust gas discharged and discharged from the grain dryer through the duct is removed and collected by the filter, and only the dust-removed exhaust gas is discharged to the outside. No dust is scattered around the work area around the dryer.

By the way, in such a dust collector,
Due to the filter that removes the dust in the exhaust air sent from the grain dryer by pressure, for example, if the operator neglects the regular inspection and maintenance of the equipment and the filter is clogged, the grain The internal pressure of the duct for sending and discharging the exhaust air from the dryer to the dust collector rises. For this reason, the air volume of the blower of the grain dryer is reduced, and there is a possibility that the normal operation of the grain dryer is impaired or the drying performance is reduced.

[0005] In consideration of the above facts, the present invention can not only remove dust in exhaust gas discharged from a grain dryer to make the working environment around the grain dryer clean, but also temporarily Can maintain the normal operation and drying performance of the grain dryer even when the regular inspection and maintenance of the equipment are neglected, and can encourage the workers to perform the periodic inspection and maintenance of the equipment. It is an object of the invention to obtain a dust collector for a grain dryer, which is made possible and which can be realized with a simple structure.

[0006]

According to a first aspect of the present invention, there is provided a dust collector for a grain dryer, wherein the dust collector is connected to an exhaust introduction path for guiding exhaust discharged from the grain dryer, and is fed through the exhaust introduction path. In a dust collector for a grain dryer that removes dust from the exhaust air and discharges dust-removed exhaust to the outside, the dust collector is provided at a connection portion of the exhaust introduction path, and the internal pressure of the exhaust introduction path exceeds a predetermined value. It is characterized by having a pressure release lid for partially opening the exhaust introduction path.

[0007] In the dust collector for a grain dryer according to the first aspect, exhaust gas discharged from the grain dryer is sent through an exhaust gas introduction path, dust is removed from the exhaust gas, and the dust-removed exhaust gas is discharged to the outside. . For this reason, the situation where dust is scattered in the workplace around the grain dryer is eliminated.

Here, a pressure release cover is provided at a connection portion of the exhaust gas introduction passage. When the internal pressure of the exhaust gas introduction passage exceeds a predetermined value, the pressure release cover is opened to open the exhaust gas introduction passage. Are partially opened.

Therefore, for example, if the worker neglects regular inspection and maintenance of the apparatus and the filter of the dust collector is clogged, the internal pressure of the exhaust gas introduction passage increases due to the exhaust pressure from the grain dryer. However, when the pressure release lid is opened, the internal pressure of the exhaust gas introduction passage does not significantly increase beyond a predetermined value. For this reason, the air volume of the blower of the grain dryer does not decrease, and the normal operation and drying performance of the grain dryer can be maintained.

As described above, in the dust collector for a grain dryer according to the first aspect, the dust in the exhaust gas discharged from the grain dryer is removed to make the working environment around the grain dryer a clean environment. Not only is it possible, but also if the operator neglected regular inspections and maintenance of the apparatus, the normal operation and drying performance of the grain dryer can be maintained.
In addition, if the opening of the pressure release lid is displayed by, for example, a buzzer or a lamp, it is possible to urge the operator to perform a periodic inspection or maintenance of the device. Further, it can be realized by a simple structure in which a pressure release lid is provided at a connection portion of the exhaust introduction path.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic front view showing the entire structure of a dust collector 10 for a grain dryer according to an embodiment of the present invention and a grain dryer 100 to which the dust collector 10 is applied. Have been. FIG. 2 is a perspective view showing the entire configuration of the dust collector 10. FIG. 4 is a perspective view showing a configuration of a main part of the dust collector 10.
FIG. 5 is a longitudinal sectional view showing a configuration of a main part of the dust collector 10.

As shown in these figures, the dust collector 10
Is provided with a case 12 constituting its outer shell. The case 12 includes a machine frame 14 framed in a substantially rectangular parallelepiped shape,
The first tent 16 to the third tent 20 covering the machine casing 14
And is constituted by. First, the configuration of the machine casing 14 and the configurations of the first tent 16 to the third tent 20 will be outlined.

In particular, as shown in FIG. 4, a ridge frame 22 in which pipes are bent in a U-shape is disposed between the upper frame 14A on the right side and the upper frame 14B on the left side of the machine casing 14. Near the left side of the machine casing 14, an upper intermediate frame 14D and a lower intermediate frame 14E are disposed in parallel with the upper frame 14A and the lower frame 14C on the right side. Further, a first support plate 24 having a predetermined width is stretched between intermediate portions in the longitudinal direction of the upper frame 14A and the lower frame 14C on the right side. Similarly,
A second support plate 26 having the same width as the first support plate 24 is stretched between intermediate portions in the longitudinal direction of the upper intermediate frame 14D and the lower intermediate frame 14E.

In particular, as shown in FIG. 2, the first tent 16 is formed in a substantially box shape so as to cover most of the machine frame 14, and the second tent 18 is formed in a substantially dish-like shape so as to cover the bottom of the machine frame 14. The third tent 20 is further provided with a dust exhaust port 28 formed on the right side of the machine frame 14 in the first tent 16.
It is formed in a bay window shape to cover (see FIG. 5). The first tent 16 and the second tent 18 are the first chuck 3
0 and the first tent 1
The sixth tent 20 and the third tent 20 are separably joined by a second chuck 32 (see FIG. 5). Further, a third chuck 33 for opening and closing the first tent 16 itself is attached to a center of a side surface of the first tent 16 on which an auxiliary dust collector 82 described later is installed.

As shown in FIG. 2, a large-diameter, tubular duct connecting portion 34 is integrally formed on the upper portion of the first tent 16 on the left side of the machine frame 14. The duct connecting portion 34 is connected to a blower-side duct 36 as an exhaust introduction path connected to the blower 102 of the grain dryer 100. In addition, when normal exhaust is performed by the blower 102 of the grain dryer 100, the internal pressure of the blower-side duct 36 is, for example, 3 to 8 mmAq.

Here, a pressure release lid 35 is provided at the duct connection portion 34. As shown in FIG. 3, the pressure release cover 35 is attached by a hinge 37 so as to be openable and closable so that the lower surface side of the cylindrical duct connection portion 34 can be partially opened. A locking flange 39 is provided on a side surface of the duct connection portion 34 corresponding to a tip portion (an end portion opposite to the hinge 37) of the pressure release lid 35. The locking flange 39 is formed of a magnet (or a magnet is embedded), and locks the pressure release lid 35 in a closed state by a magnetic attraction. Therefore, when the internal pressure of the blower side duct 36 exceeds the suction locking force by the locking flange 39, the pressure release lid 35 rotates around the hinge 37 and the duct connection portion 34 (blower side duct 36) partially becomes. It is configured to be in an open state.

When the internal pressure of the blower side duct 36 exceeds, for example, 10 to 15 mmAq, the pressure release cover 35 by the locking flange 39 is released so that the suction release of the pressure release lid 35 by the locking flange 39 is released. , The magnetic force of the locking flange 39 is set.

Further, near the duct connection portion 34 of the first tent 16, a small-diameter hose connection opening 38 is provided.
(See FIG. 5). An exhaust pipe 88 of an auxiliary dust collector 82 described later is connected to the hose connection opening 38.

Next, the structure of the main part of the dust collector 10 will be described in detail.

As shown in FIG. 4 and FIG.
A rotation horizontal shaft 42 serving as a rotation center axis of the drum filter 40 is supported between intermediate portions of the first support plate 24 and the second support plate 26 in the height direction. Rotating horizontal shaft 42
, The driven pulley 44
Is fixed. Further, a motor 46 is provided below the second support plate 26. An output shaft 48 of the motor 46 passes through a lower portion of the second support plate 26, and a driving pulley 50 is fixed to a penetrating end thereof. The driving pulley 50 and the driven pulley 44 are arranged vertically opposite to each other, and are connected to each other by being wound around a driving force transmission belt 52.

A drum filter 40, which is a cylindrical body having an internal cavity, is attached to the above-mentioned rotary horizontal shaft 42.
As shown in FIG. 5, the drum filter 40 includes a disc-shaped closing plate 54 and an annular ring plate 56 arranged in parallel with each other. These closing plates 54
Are bent in directions approaching each other, and both bent portions 54A, 56A are bent.
A filter 58 is wound between the outer peripheral surfaces of A.
The filter 58 is made of a non-woven fabric or the like, and is fixed to the bent portions 54A and 56A by a pair of holding bands 60.

Further, a large-diameter support ring 62 is inserted into the first support plate 24 so as to be adjacent to the ring plate 56 of the drum filter 40. Inside the support ring 62, a packing 64 having a substantially U-shaped cross section fixed to an end face of the ring plate 56 is fitted to secure airtightness. The packing 64 is formed by forming a sponge into an annular shape. A terminal portion of the dust removal exhaust port 28 of the first tent 16 is wound around the outside of the support ring 62, and a sheet holder 66 having a U-shaped cross section is fitted to the terminal portion.

At the lower end of the outer peripheral portion of the above-mentioned drum filter 40, a filter suction portion 68 is arranged in close proximity. As shown in FIG. 6, the filter suction unit 68
A gutter-shaped cover 70 arranged longitudinally in the drum axis direction and having both ends closed, and a brush 7 housed in the cover 70 such that the tip thereof contacts the outer peripheral surface of the filter 58.
2 and a pipe 74 communicated with the center of the bottom of the cover 70 and extends in a direction perpendicular to the cover 70. The pipe 74 of the filter suction unit 68 has a dust collector 1
Hose 78 of suction machine (vacuum cleaner) 76 placed outside
Is connected.

As shown in FIGS. 4 and 5, between the left side of the machine frame 14 and the closing plate 54 of the drum filter 40, a pre-filter 8 formed in a substantially rectangular shape is provided.
0 is detachably installed. The pre-filter 80 is configured by a network or the like.

Further, as shown in FIGS. 2, 4 and 7, dust is collected outside the above-mentioned dust collector 10 using the cyclone principle (that is, dust and airflow are separated by centrifugal force due to a swirling flow). An auxiliary dust collector 82, which is an auxiliary machine that separates and collects dust, is provided. This auxiliary dust collector 82
Is disposed so as to penetrate a bottomed cylindrical main body portion 84 made of vinyl or the like, a cylindrical hose connection portion 86 connected to an outer peripheral portion of the main body portion 84, and a top portion of the main body portion 84. An L-shaped exhaust pipe 88 is provided. A hose duct 86 connected to the dust collector 104 of the grain dryer 100 is connected to the hose connection portion 86 of the auxiliary dust collector 82. As shown in FIG. 4, the main body 84 of the above-mentioned auxiliary dust collector 82 is fixed to the machine frame 14 by screws 94 through angle-shaped fasteners 92.
Is fixed to the vertical frame 14F.

Next, the operation and effect of this embodiment will be described.

The exhaust gas discharged from the blower 102 of the grain dryer 100 contains dust, and the exhaust gas is indicated by a hatched arrow A in FIGS. Such exhaust
From the duct connection portion 34 through the blower side duct 36, the first
It is sent into the tent 16.

Further, dust is also contained in the exhaust gas discharged from the dust remover 104 of the grain dryer 100, and the exhaust gas is indicated by a diagonal arrow B in FIGS. Note that the amount of dust is much larger in the exhaust discharged from the dust remover 104 (shaded arrow B) than in the exhaust discharged from the blower 102 (shaded arrow A). The exhaust gas discharged from the dust remover 104 side is sent from the hose connection portion 86 into the main body portion 84 of the auxiliary dust collector 82 through the dust remover side duct hose 90. As shown in FIG. 7, the exhaust gas sent into the main body 84 of the auxiliary dust collector 82 is separated into dust and airflow by the cyclone principle. Although dust remains in the separated airflow, the airflow is sent into the first tent 16 through the hose connection opening 38 through the exhaust pipe 88.

The two kinds of exhaust air sent into the first tent 16 as described above pass through the pre-filter 80 next. At this time, part of the dust in each exhaust gas adheres to the pre-filter 80, thereby further removing the dust from each exhaust gas. However, some dust is still contained in the exhaust gas that has passed through the pre-filter 80 and merged, and the exhaust gas is indicated by a hatched arrow C in FIG. The exhaust gas is sent to the drum filter 40 which is scheduled as a next step.

As shown in FIGS. 4 and 5, when the exhaust gas after passing through the pre-filter 80 is sent to the drum filter 40 side, the motor 46 is already driven and the drum filter 40 rotates slowly. It is rotating around the horizontal axis 42. In this state, the exhaust gas that has passed through the pre-filter 80 is passed from the outer peripheral side to the inner peripheral side of the drum filter 40. At this time, the dust in the exhaust gas adheres to the outer peripheral portion of the filter 58 in the drum filter 40 and is collected, and the remaining dust remaining in the exhaust gas is removed.

At the lower end of the outer peripheral portion of the drum filter 40, a filter suction portion 68 is arranged close to the drum filter 40. In the process of slowly rotating the drum filter 40, the brush 72 in the cover 70 contacts the filter 58. We scrape off attached dust. The scraped dust is covered by a cover 70
Fall into. Then, by operating the suction device 76, the dust falling into the cover 70 is sucked into the suction device 76 through the pipe 74 and the hose 78 and is collected.

The dust exhaust (clean exhaust) from which the dust has been completely removed in this manner is sent from the ring plate 56 of the drum filter 40 to the third tent 20 through the dust exhaust port 28 of the first tent 16, and Third tent 2
0 is released to the outside from the lower end. Therefore, the situation where dust is scattered in the work place around the grain dryer 100 is eliminated.

In FIGS. 2 and 4, the dust removal exhaust from which the dust is completely removed is indicated by a white arrow D. In FIG. 5, two types of exhaust gas flows in the dust collector 10 are indicated by arrows P.
(Corresponding to the flow of exhaust gas from the blower of the grain dryer) and arrow Q (corresponding to the flow of exhaust gas from the dust remover of the grain dryer).

In this dust collector 10, a pressure release lid 35 is provided at a duct connecting portion 34 to which a blower duct 36 connected to a blower 102 of the grain dryer 100 is connected. (Duct connection 3
When the internal pressure of 4) exceeds the suction locking force of the pressure release lid 35 by the locking flange 39, the pressure release lid 35 rotates around the hinge 37 and the blower side duct 36 (the duct connection portion 34).
Are partially opened.

Therefore, for example, if the operator neglects regular inspection or maintenance of the apparatus and the drum filter 40 or the pre-filter 80 of the dust collector 10 is clogged, the exhaust pressure from the grain dryer 100 causes Although the internal pressure of the blower side duct 36 rises, the pressure release lid 3
The opening of 5 prevents the internal pressure of the blower-side duct 36 from significantly increasing beyond a predetermined value. For this reason, the air volume of the blower 102 of the grain dryer 100 does not decrease, and the normal operation and drying performance of the grain dryer 100 can be maintained.

As described above, the dust collector 1 according to the present embodiment
In the case of 0, not only the dust in the exhaust gas discharged from the grain dryer 100 can be removed and the working environment around the grain dryer 100 can be made clean, but also the worker can perform periodic inspection and maintenance of the apparatus. Even when neglecting, etc., normal operation and drying performance of the grain dryer 100 can be maintained. In addition, if the opening of the pressure release cover 35 is displayed by a buzzer, a lamp, or the like, it is possible to urge the operator to perform a periodic inspection of the device, maintenance, or the like. Furthermore, it can be realized by a simple structure in which the pressure release lid 35 is provided at the duct connection portion 34 to which the blower side duct 36 is connected.

In this embodiment, the dust collector 10 is provided with the drum filter 40 and the pre-filter 80. However, the configuration for dust collection is not limited to this. Any material can be used as long as it can remove dust in exhaust gas discharged from the device and collect dust.

[0038]

As described above, the dust collector for a grain dryer according to the present invention removes dust in the exhaust gas discharged from the grain dryer to make the working environment around the grain dryer clean. Not only can the grain dryer be operated properly and the drying performance can be maintained even if the worker neglected the regular inspection and maintenance of the equipment.
Moreover, there is an excellent effect that it is possible to urge the operator to carry out a periodic inspection, maintenance and the like of the device, and this can be realized with a simple structure.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an entire configuration of a dust collector according to an embodiment of the present invention and a grain dryer to which the dust collector is applied.

FIG. 2 is a perspective view showing the entire configuration of the dust collector according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a configuration of a pressure release lid of the dust collector according to the embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a main part of the dust collector according to the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a configuration of a main part of the dust collector according to the embodiment of the present invention.

6 is a vertical sectional view showing the internal structure of the filter suction unit shown in FIG. 5, taken along the line 6-6 in FIG. 5;

FIG. 7 is a longitudinal sectional view showing the internal structure of the auxiliary dust collector shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Dust collector 28 Dust removal exhaust port 34 Duct connection part 35 Pressure release lid 36 Blower side duct (exhaust introduction path) 39 Engagement flange 40 Drum filter 68 Filter suction part 76 Suction machine 80 Pre-filter 82 Auxiliary dust collector 90 Dust remover side duct hose 100 Grain dryer 102 blower

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F26B 21/04 F26B 21/04 B (72) Inventor Kazumi Jimbo 404 Oinomori, Tendo-shi, Yamagata Pref. (72) Inventor Mutsumi Goto 404 Oinomori, Tendo-shi, Yamagata Prefecture, Ltd.Yamamoto Works, Ltd. AC46 AC53 AC54 AC57 AC60 AC63 AC67 AC75 AC81 AC82 AC83 BA03 CA10 CB24 CB28 CB31 CB34 CB37 CB38 DA13 DA22 4D043 JB07 JB08 JF10 4D058 JA12 JA42 QA01 QA09 QA11 SA20 UA30

Claims (1)

[Claims] 1. A grain dryer which is connected to an exhaust gas introduction path for guiding exhaust gas discharged from a grain dryer, removes dust from exhaust gas sent through the exhaust gas introduction path, and discharges dust-removed exhaust to the outside. A dust release device, provided at a connection portion of the exhaust gas introduction path, wherein the pressure release lid is provided to partially open the exhaust gas introduction path when the internal pressure of the exhaust gas introduction path exceeds a predetermined value. Dust collector for grain dryer.