JP2006264963A - Rotary drum conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary drum conveyor capable of stably supplying/transporting a dry raw material much in fine powder from a storage place without flushing. <P>SOLUTION: A central shaft 12 and a screw blade 13 erected on this outer periphery are arranged in a cylindrical rotary casing 11. The outer peripheral end of the screw blade 13 is integrally fixed in a state having no clearance with an inner peripheral surface of the rotary casing 11. In an end part of the rotary casing 11, an inlet side end part is rotatably inserted into an inlet side connecting fixed casing 14, and an outlet side end part is rotatably inserted into an outlet part connecting fixed casing 15. The central shaft 12 is projected outward from both ends of the rotary casing 11, and is journaled on one end side, and is connected to a driving source, and is rotatably supported on the outer peripheral side of the rotary casing 11 integrally fixed on the other end side, and is constituted so as to integrally rotate the central shaft 12 and the rotary casing 11 in driving. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention has a standard size of 50 mm or less, and a lump containing a large amount of fine powder containing a lump, a lump containing a lot of moisture, Alternatively, the present invention relates to a rotary drum conveyor that can continue operation without clogging a dry raw material containing a large amount of fine powder that is easy to flush, and that can stably feed and transport without flushing.

When raw materials containing a large amount of clayey raw materials such as shale and slate are dried using a rotary dryer, depending on the drying state, even if the clayy raw material contains a large amount of lump, it will become a powdery material as the drying progresses. It changes to the state where there are many. This situation is the case when only clayey raw materials are dried, or other raw materials, such as cement raw materials, the standard size is 50 mm or less, but lumps of about 50 to 150 mm are slightly mixed with limestone It occurs even when it is dried in a mixed state exceeding 80% by weight, and a belt feeder (hereinafter abbreviated as “Bef”) or an apron feeder (hereinafter abbreviated as “AF”) is often used as a feeding device from a silo for storing dry matter. When used and fed, flushing may occur.
In general, when feeding granular materials with Bef or AF, it is intended to prevent flash by combining with a device such as a rotary feeder (hereinafter abbreviated as RF). Since a considerable amount of materials are mixed in and there is a concern about the occurrence of troubles with masses of lump in RF, it is normal that it is not used.

As described above, it is desired to develop a device that stably feeds and transports dry raw materials with a lot of fine powder that often causes flash when using Bef or AF in a state where RF cannot be used in combination, from the silo that stores them. It was.
If a screw conveyor (hereinafter abbreviated as SC. A screw feeder (abbreviated as SCF) is used as a feeding device) is used as a feeding / transporting device (Patent Documents 1 and 2), in order to prevent flashing. Can be adapted to flash to an approximate extent by reducing the screw pitch (blade interval) of the drawing portion to be small and making the gap between the screw blade and the casing as small as possible.

However, it is a granular material containing a large amount of fine powder, and handles dry materials that are easy to flash (hereinafter abbreviated as dry materials that contain a large amount of fine powder) that are roughly 50 mm or less, and some 50 to 150 mm. In view of this, it can be easily estimated that a material biting trouble occurs in the gap between the screw blade and the casing, and the SC is not an appropriate device.
In addition, when a screw conveyor is formed on the rotating shaft of the motor (Patent Document 3), it can be used for transporting a small amount in quantity, but a large amount of drying is performed directly from a silo or rotary dryer storing dry raw materials with a lot of fine powder. When conveying raw materials, a larger apparatus is required, and many technical problems such as shape stability, heat resistance, and sealing properties must be solved.

Next, when drying the above raw materials, if the water content of the raw material increases abnormally due to heavy rain such as the rainy season or typhoon, or the water content of the dry raw material increases abnormally due to equipment or operational troubles. There is. In such a case, the maximum amount of water may be several tens of percent and may be partially sticky.
In such a case, with the conventional Bef or AF, the raw material adheres to the belt or apron which is a feeding / transporting device, making it impossible to feed / transport, clogging the squeezed part at the bottom of the silo, arching, etc. In some cases, it was not possible to withdraw stably.

JP 2004-151118 A JP-A-9-169421 JP 59-90795 A

[Problems of the prior art]
In the silo at the end that temporarily stores the dry material dried by the rotary dryer, and the silo that contains the remaining dust part that has been removed from the dry material using the tripper in the previous silo, almost only the granular material Is inserted. However, since there is a possibility that some lumps may be thrown in, since the silo extraction device used AF alone without using RF or the like, the flash was most frequently generated among silos of this system. .
In conventional feeding and transporting devices such as Bef and AF, it is difficult to feed dry raw materials of powder containing a lot of fine powders without flushing, and generally RF is incorporated before that. To prevent flash.
Considering only flash countermeasures, if SC is used, there are some structures that support the feeding and transportation of powders that are relatively easy to flash, but the dry raw materials that contain a lot of fine powder handled this time are less than 50 mm. Since the lump contains some lump of about 50 to 150 mm, the type of RF or SC that supports flushing is likely to cause troubles that bite the lump into the gap between the rotating part and the casing. It cannot be used as a device.

Therefore, it was unavoidable to use Bef and AF alone to feed and transport, but the dry raw material that was handled this time often caused problems due to flushing when it was pulled out of the silo, and it was a transport device in the subsequent stage. The belt conveyor was buried or the belt was damaged.
In addition, as a conventional feeding device from silos, there are shaking feeders, table feeders, chain feeders, air feeders, etc. Regarding transportation, there are problems such as difficulty in taking a complete flash prevention measure and difficulty in handling a granular material mixed with lump, and it is difficult to say that it is a suitable device.

Furthermore, if the moisture of the raw material supplied to the dryer becomes abnormally high due to heavy rain such as rainy season or typhoon, or if the drying equipment system is severely defective due to operational or mechanical problems, it will pass through the dryer. A silo having a water content of several tens of percent by weight may be charged later.
Thus, it is desirable that even a raw material containing a massive substance with a high water content can be stably drawn out for feeding and transportation.

The present invention has been made in view of the above problems in the prior art, and the problem specifically set in order to solve the problem is to stably dry a dry raw material containing a lot of fine powder without flushing from the storage location. It is to provide a rotating drum conveyor that can be fed and transported.
In addition, there is a device that can stably feed and transport from dry raw materials with a lot of fine powder with little moisture, to dry raw materials with relatively large particle sizes, and further to raw materials with a large amount of water. There is to do.

  Therefore, a silo drawing device is conceived of a sealed type and has a structure that prevents the force of the dry raw material to be flushed. In this process, the inside of the casing is the raw material while being like an SC. As a result, it is no longer flashed by being filled with, and in addition, it is assumed that a lump of about 50 mm to 150 mm or a smaller granular material does not bite into it. As a result of earnest research on the basis of this idea, there is a lot of fine powder. In order to stably draw out the dry material from the silo, there is no problem of biting trouble by not providing a rotating part such as SC or RF inside the device. In addition, since often dry ingredients of fine powder as an object it is of easy to flush, in order to prevent flash and solve the problems be provided with a wall including the object itself in the apparatus. That is, the problem solving means is as follows.

  As a specifically configured means that can effectively solve the above-mentioned problems, the first problem solving means in the rotary drum conveyor of the present invention includes a central axis in a cylindrical rotary casing and an outer periphery of the central axis. A screw blade is provided, and the outer peripheral end of the screw blade is integrally fixed to the inner peripheral surface of the rotating casing without any gap, and the end of the rotating casing is connected to the end on the inlet side. Insert in the fixed casing for connection rotatably, insert the end on the outlet side rotatably in the fixed casing for outlet connection, the central axis protrudes outward from both ends of the rotary casing, The one end side is pivotally supported and connected to the drive source, and the other end side is rotatably supported on the outer peripheral side of the rotating casing that is integrally fixed. During driving, the central shaft and the rotating casing rotate integrally. And it is characterized in Rukoto.

The second problem solving means in the rotary drum conveyor is that the inlet end of the screw blade is inserted into the fixed casing for connection on the inlet side in a state of protruding from the end of the rotary casing together with the central axis. It is characterized by.
The third problem-solving means in the rotary drum conveyor is characterized in that the moisture of the object to be fed and transported is used in the range of 0 to 30% by weight.

A fourth problem solving means in the rotary drum conveyor is characterized in that the outer peripheral surface of the rotary casing is supported by a plurality of rollers on the same cross section.
The fifth problem solving means in the rotary drum conveyor is characterized in that the outer periphery of the portion received by the roller of the rotating casing is doubled in a belt shape, and the outer peripheral surface of the doubling portion is processed into a perfect circle concentric with the central axis. And

The sixth problem solving means in the rotary drum conveyor as described above uses a sealing member made of a flexible material between the outer surface of the rotary casing and the fixed casing for connecting the inlet side and the fixed casing for connecting the outlet portion. It is characterized by forming a seal structure.
The seventh problem-solving means in the rotary drum conveyor is characterized in that in the seal structure, a sliding surface abutting member is always pressed against the sliding surface by an urging force of an elastic member such as a spring.

As described above, the first problem-solving means in the rotary drum conveyor of the present invention is a hermetic feeding / transporting device, and the screw blade has an outer edge portion spaced from the inner peripheral surface of the cylindrical rotary casing. In this rotating casing, a spiral passage is formed, and the dry raw material is gradually sent to the outlet side as it rotates with the passage filled.
Since the actual passing distance of the dry raw material greatly exceeds the length of the device, the dry raw material itself fills the spiral path and flows in the axial direction even when handling items that are easy to flush. It works to prevent you.
For this reason, dry raw materials are fed and transported stably and continuously without flashing. At the same time, no dust is generated due to the blowout around the apparatus, and no dust accumulates on the rotating drum conveyor and the periphery of the transport device located downstream thereof, so that a clean state can be maintained.
As a matter of course, when the rotary casing is viewed in cross section, the screw blades are overlapped with each other, and act to prevent axial flow by dispersing and receiving the force of the dry raw material to be flushed.
As a result, the dry raw material is sewed in a screw-shaped space between the screw blades and the casing, and is gradually sent from the inlet toward the outlet, and the conveying part is formed in the spiral space, so that the silo is removed from the silo. The force of flushing the dry raw material drawn out is absorbed by the screw blades and the raw material itself between them, and can be fed and transported without flushing.

  In the second problem solving means in the rotary drum conveyor, the screw blades are inserted into the fixed casing for connection on the inlet side together with the central shaft, so that the fixed casing for connection on the inlet side provided in the lower part of the silo. Because it works like cutting out the raw material, it can be pulled out stably, and it can be fed and transported without causing adhesion or arching, even if it is a dry raw material that is relatively free of clumps or a raw material with a lot of moisture. Furthermore, if a clogging prevention device such as a vibrator is provided at a suitable position, there is a synergistic effect, and feeding and transportation can be performed more effectively.

  Further, in the third problem solving means in the rotary drum conveyor, if the moisture content of the raw material is in the range of 0 to 30% by weight, adhesion, clogging, arching or the like in the existing silo or feeding / transporting device can be avoided, There is no deficiency of the raw material drawing due to these, and the dry raw material can be drawn stably. In particular, if the amount of moisture in the dry material increases due to heavy rain such as the rainy season or typhoon, or the water content of the dry material increases abnormally due to equipment or operational problems, existing silos, Even if the transport device is stuck inside, clogged, or arched and cannot be pulled out stably, the inlet end of the screw blade is deep inside the inlet side connection casing at the bottom of the silo. By forming so that it may enter, the force which cuts and pulls a screw out to a dry raw material acts, and it can feed and transport easily.

In the fourth problem solving means in the rotating drum conveyor, the outer peripheral surface of the rotating casing is supported by a roller, so that the center shaft is supported in a cantilevered state. In a more preferable state, the support becomes appropriate, and the load on the bearing can be reduced to disperse the support load appropriately, the size of the apparatus can be increased, and the conveyance capacity can be improved.
Further, in the fifth problem solving means in the rotating drum conveyor, the rotating casing can be supported at the true circular position, the rotation of the rotating shaft is eliminated, the rotation is smoothed, and the load on the supporting portion is reduced. Uniformity can be achieved and the sealing performance of the seal portion can be improved.

Moreover, in the 6th problem-solving means in a rotating drum conveyor, while using a flexible material for a sealing structure, the sealing in a large rotator can be facilitated and the sealing performance can be improved.
Further, in the seventh problem solving means in the rotary drum conveyor, even if the sealing structure uses a flexible material, the sliding surface abutting member is pressed against the sliding surface by the urging force of the elastic member, It is possible to prevent the deterioration of the property, to prevent the leakage from the seal structure portion, to prevent the flash, and to maintain the predetermined sealing property.

Hereinafter, embodiments of the present invention will be specifically described.
In addition, this embodiment is specifically described in order to make the gist of the invention better understood, and does not limit the items described in the claims unless otherwise specified.

〔Constitution〕
The rotating drum conveyor 10 in this embodiment forms the rotating casing (henceforth abbreviated as casing) 11 which forms a rotating drum in the shape of a cylinder, as shown in FIGS. And the diameter of the outer edge of the screw blade 13 is increased until it contacts the inner surface of the casing 11, and the gap between the outer peripheral end of the screw blade 13 and the inner surface of the casing 11 is closed by arc welding or the like. It sticks. One end of the casing 11 is an inlet and the other end is an outlet.
An inlet portion 11a of the casing 11 is a fixed casing for connecting the inlet side at the lower part of a silo, a bin, a hopper, etc. (not shown, hereinafter referred to as a silo) (hereinafter abbreviated as an inlet side connecting casing). 14, the outlet portion 11 b is inserted into a fixed casing (hereinafter abbreviated as an outlet portion connecting casing) 15 for connecting the outlet portion to transfer to a downstream (downstream) transport machine (not shown).

The connection angle between the casing 11 and the inlet-side connecting casing 14 is normally attached with a horizontal or outlet-side down gradient, and for dry raw materials that are extremely prone to flushing, the outlet side is attached with an upward slope, and the outlet side is lowered. When the gradient is expressed as a positive (+) angle and the rising gradient is expressed as a negative (−) angle, it is preferably in the range of −10 to + 15 °, and in particular, it is preferably in the range of 0 to + 5 °.
The diameter of the casing 11 is at least three times the maximum diameter (length on the long axis side) of the lump mixed in the dry raw material. In particular, considering the transport efficiency, the diameter of the casing 11 is the maximum diameter of the lump ( It is desirable that the length be 3 to 5 times the length of the long axis.

A central shaft 12 that passes through the central portion of the casing 11 from the inlet side to the outlet side protrudes outward from the casing 11 so as to be connected to a driving device (not shown) on the outlet side, and the inlet side connecting casing on the inlet side. 14 protrudes deep inside.
The end of the central shaft 12 on the outlet side protrudes outward to a length connectable to the drive device, and the tip end is formed to be connectable to the drive side shaft 16 by a flange 17 or a fitting member. Or it connects with the axis | shaft 16 connected with the drive device with the fitting + through-bolt through the Labrex coupling.

The end located on the outlet side of the screw blade 13 is provided with an end on the inner side within a range of 100 mm or less from the end face of the open end of the casing 11, and in particular within a range of several tens of mm from the end in consideration of the raw material discharge efficiency. It is desirable to provide it inside.
Appropriate so that the end on the outlet side of the screw blade 13 can be used in an open state, the downstream side is connected to a subsequent transport device, dust generation is prevented, and the downstream transport device can be quickly connected. An outlet connection casing 15 is provided so as to provide a hood on the outlet side.

Since the outlet side of the casing 11 is connected to the next transporter in an open state structure, in order to prevent dust generation and provide an appropriate outlet connection casing so that the next transporter can be quickly connected, If a dusting device is provided, a more preferable configuration is obtained.
A motor for driving and a speed reducer are connected to the outlet side end of the central shaft 12, and the rotation of the motor is controlled via an inverter (hereinafter abbreviated as INV) to control the increase / decrease in the number of rotations of the casing 11. Adjust the transport amount as appropriate to achieve the required amount of feeding and transportation.
The increase / decrease in the amount of drawer from the lower part of the silo is adjusted by controlling the increase / decrease in the rotation speed of the casing 11.

The end portion on the inlet side of the central shaft 12 is provided in a state protruding from the end portion on the inlet side of the casing without being supported by a bearing or the like, and the screw blade 13 is provided up to the shaft end position.
A portion protruding from the casing 11 of the central shaft 12 to which the screw blades 13 are attached is provided so as to enter deeply into the inside of the inlet side connection casing 14 formed in the lower part of the silo of the dry raw material.
This is because the dry raw material put into the silo is about several millimeters or less in size, and there is little risk of damage to the screw blades 13 due to the lump, and it has the effect of scraping even if a lot of moisture enters. Since it can be expected, the center shaft 12 provided with the screw blades 13 is inserted.

The casing 11 has an outer diameter of 700 mm, a plate thickness of 6 mm, a length of 3100 mm, the center shaft 12 is a steel pipe of STPG125Asch60 and has a thickness of 140 mm, the screw blade 13 has a pitch of 350 mm, a plate thickness of 6 mm, and a pitch of 10 pitches. The screw blade 13 is attached from the inside of 75 mm.
The casing diameter should be at least three times the maximum diameter (length on the long axis side) of the lump that is mixed with the dry raw material, and as the minimum dimension to prevent clogging of the lump Is preferably about 3 to 5 times.
Therefore, the casing diameter is preferably 1000 mm or less, and more preferably in the range of about 400 to 800 mm.
Moreover, it is desirable that the pitch of the screw blades 13 is at least twice the maximum diameter (length on the long axis side) of the lump that is mixed with the dry raw material, and at least 2 to 4 times. The length of the screw blade 13 in the axial direction is preferably 5 to 20 pitches, particularly 7 to 12 pitches from the viewpoint of miniaturization.

In addition, since the support state of the central shaft 12 is a cantilever structure at only one bearing on the drive side, there is a possibility that the entrance side may be swung without drawing a perfect circle. The position near the inlet side end of the casing 11 is received by the plurality of rollers 18,.
For this reason, the roller receiving portion 11c of the casing 11 is doubling with a thickness of 10 mm like a tire so as to increase rigidity, and the outer surface is processed into a perfect circle concentric with the central axis. Then, at least four rollers 18,..., 18 are equally arranged in a circumferentially uniform place in the cross section of the perfect circle machining place, and are rotatably attached, so that the axis of the casing 11 rotates without shaking. Each of the rollers 18,..., 18 is rotatably attached to the opposing surfaces of the beam members 20, 20 spanned over the support columns 19, 19 via support members 20a,.
The casing 11 is inserted into a space surrounded by the support columns 19 and 19 and the beam members 20 and 20 so as to be surrounded by the rollers 18.
The roller 18 is a urethane rubber wheel, but other rollers may be used.

As shown in FIGS. 3 and 4, a rubber plate or the like is provided between the inlet-side connection casing 14 at the lower part of the silo that is the fixed part and the casing 11 that is the rotating part, where the gap cannot be completely eliminated. The sealing structures 23 and 24 using the sealing members 21 and 22 made of a flexible material are formed as a countermeasure against leakage.
As shown in FIG. 3, the sealing structure 23 on the inlet side is provided with a receiving portion 25 for contacting the sealing member on the outer peripheral side of the casing 11, and the sealing member 21 that functions as a seal by contacting the receiving portion 25. The sandwiched seal member support structures 27a and 27b are projected from the inlet side connection casing 14, and a plate-like member 27c extending from the seal member support structure 27a to the casing 11 side is not contacted from both sides on the outer peripheral surface of the casing 11. The labyrinth plates 29a and 29b arranged at positions sandwiched between the two are erected. The base portion 27 d of the seal member support structure 27 a is fixed to the inlet side connection casing 14.
As shown in FIG. 4, the outlet side seal structure 24 is provided with a receiving portion 26 for contact with the sealing member on the outer peripheral side of the casing 11, and the sealing member 22 that functions as a leak stopper by contacting the receiving portion 26. The sandwiched seal member support structures 28 a and 28 b are projected from the outlet connection casing 15. The base portion 28 c of the seal member support structure 28 a is fixed to the outlet connection casing 15.

[Function and effect]
In the rotary drum conveyor 10 of the present embodiment, the casing 11 is formed in a cylindrical shape, the screw blades 13 are provided integrally with the central shaft 12 penetrating through the center portion thereof, and the screw blades 13 are rotated together with the central shaft 12. Since the screw blade 13 is expanded and fixed to the inner surface of the casing 11, it is a sealed feeding / transporting device, and the dry raw material sews a screw-like space between the screw blade 13 and the casing 11. And gradually sent from the inlet toward the outlet.

Since the conveying unit is formed in a closed spiral space, the force of flushing the dry raw material drawn from the silo is absorbed by the screw blade 13 and the raw material itself between them as a wall, and sent without flushing. Is done.
As a result, the dry raw material can be fed and transported stably and continuously without flashing, and at the same time, no dust is generated due to blowing around the apparatus, and dust is accumulated around the rotary drum conveyor 10 and the transport equipment in the subsequent stage. Can maintain a beautiful state.
As a matter of course, the screw blades overlap each other when viewed in the cross section of the cylindrical casing, and act to prevent the flow of the dry raw material by dispersing and receiving the force of the dry raw material to be flushed.
By setting the size of the casing of the rotary drum conveyor and the size and pitch of the screw blades to an appropriate range, the strength of the roller receiving the casing and its mount can be increased without increasing the weight and driving power of the rotary drum conveyor. Without needing, it can effectively improve feeding and transport capacity and prevent flushing.

  Since the casing 11 rotates unlike the SC, all the load of the apparatus is applied to the central shaft 12 as it is, but the casing 11 is received by the rollers 18,..., 18 like the kiln or the rotary dryer. As a result, the load on the bearing of the central shaft 12 can be reduced, and the casing 11 also has increased rigidity by doubling the roller receiving portion 11c provided at the location received by the rollers 18,. Abrasion resistance can be improved, and the doubling part is machined into a perfect circle to create a roundness, which makes the rotation smooth and the casing rotates almost to a perfect circle. , You will be able to effectively anti-vibration.

As a result, the cylindrical casing 11 rotating in a state close to a perfect circle also has a favorable effect on the maintenance of the seal, and in particular, the connection between the casing 11 and the inlet side connection casing 14 at the lower part of the silo becomes constant. Thus, the seal structure 23 at the inlet portion can be maintained in a relatively good state, and the spilling or blowing out of the dry raw material can be prevented.
Similarly, the blowout and generation of dust can be effectively prevented by the mechanical seal structure 24 provided on the outlet side of the casing 11.

With the configuration of the seal structures 23 and 24, the seal members 21 and 22 can be easily adjusted and replaced even during operation.
Further, in the case of a dry raw material that is relatively free from clumps and a lot of moisture, the screw blades 13 protrude to the inside of the inlet side connecting casing 14 at the lower part of the silo on the inlet side of the casing 11. Since the screw blade 13 functions to cut out the dry raw material in the inlet side connection casing 14, the dry raw material can be pulled out stably. If a clogging prevention device such as a vibrator is provided at a suitable position on the inlet side connection casing 14, there is a synergistic effect, and feeding and transportation can be performed without causing adhesion or arching.

  In addition, in dry raw materials, which were another problem, the moisture of the raw materials increased due to heavy rain such as the rainy season and typhoon, or the moisture of the dry raw materials due to equipment or operational troubles. Even if it becomes abnormally large and adheres to existing silos or feeding / transportation devices, becomes clogged, or arches and cannot be pulled out stably, the end on the inlet side of the screw blade 13 is silo. By being formed so as to enter the inside of the lower inlet side connection casing 14, it is possible to easily feed and transport the contents by pulling out the contents while digging holes in the dry raw material like boring.

  Normally, the amount of water increase in the dry raw material stored by the rainy season or typhoon is about several percent, so that this amount of water increase may cause clogging of the inlet side connection casing 14 and the rotary drum conveyor 10 at the lower part of the silo. In addition, even if the amount of increase in moisture is abnormally large in the case of a combination of equipment trouble and operational error, if the rotating drum conveyor 10 rotates, the boring effect causes the silo lower part and the inlet side. The dry raw materials inside the connection casing 14 and the casing 11 of the rotary drum conveyor 10 and the inside of the main body are sent to the outlet side of the casing 11 according to the feeding speed, and can be normally fed and transported.

A case where a lump with a size of 50 mm or less as a dry raw material or a lump with a size of about 50 to 150 mm is slightly extracted from the silo that is primarily stored will be described below.
As shown in FIGS. 5 and 6, the rotary drum conveyor 30 is connected to the screw blades performed in the first embodiment on the inlet side at the lower part of the silo because the target dry raw material is relatively large in volume. Instead of being inserted into the casing, the outlet end portion of the inlet side connecting casing 34 is formed like a cylindrical chute so as to be inserted into the inlet side end portion 31 a of the casing 31.

A screw blade 33 is joined to the inlet side end portion 31a of the casing 31, and an introduction portion 31b having the same diameter is attached to the inlet side to be connected to the outlet portion 34a of the inlet side connection casing 34 at the lower part of the silo.
The introduction portion 31b is further divided into two in the axial direction, and the half located on the screw blade forming side has a spiral blade (50mm in height, 9mm in thickness this time) 31c in the axial direction that serves as a guide blade. The half located on the silo side is only the cylindrical body.
Further, the screw blade 33 is formed so that both the inlet and the outlet end inside (approximately 75 mm) from the end portion. For this reason, the total length is about 7 pitches.

The end of the central shaft 32 on the outlet side is formed to have a length connectable to the drive device 39 and protrudes into the outlet connection casing 35, and the tip is formed to be connectable with the drive side shaft 36 and the flange 37. Then, it is connected to the drive device 39 via the shaft 36 connected by the flange 37, the Labrex coupling 38 and the like.
Since the outlet side end portion of the inlet side connection casing 34 is formed into the outlet portion 34a like a cylindrical chute into the inlet side end portion 31a of the casing 31, it is completely sealed in the gap portion of the joint portion. The seal structure 40 on the inlet side is formed so that the sliding surface is always pressed by a spring 41 as shown in FIG.

  The seal structure 40 on the inlet side projects a seal member support structure 42 from the end surface of the inlet side end 31 a of the casing 31, and a receiving member 43 for holding the seal member is provided at the tip of the seal member support structure 42. A seal member 44 that functions as a leak stopper is attached to the end surface of the receiving member 43, and a support structure 45 is erected on the outer peripheral surface of the outlet portion 34 a of the inlet side connection casing 34. A spring 41 is attached to the support structure 45. A contact member 46 that contacts and presses the seal member 44 is provided. The support structure 45 and the spring 41 are attached by a screw part 47 so that the position thereof can be adjusted, and the pressing force applied to the contact member 46 that presses the seal member 44 is adjusted by adjusting the position of the screw part 47.

The seal on the outlet side of the casing is structurally the same as that of the first embodiment, and is such that the dimensions of the members used are slightly adjusted.
As shown in FIG. 8, the seal structure 50 on the outlet side protrudes from the outlet portion connecting casing 35 with seal member support structures 52 and 53 sandwiching a seal member 51 functioning as a leakage stopper on the outer peripheral side of the casing 31. . The base 52 a of the seal member support structure 52 is fixed to the outlet connection casing 35, and the seal member 51 is sandwiched between the seal member support structures 52 and 53, and is tightened by bolts 54 and nuts 55 to fix the position.
Felt packing is used as the sealing material, but a suitable sealing material will be searched for in the future.
Other details are the same as in the first embodiment.

[Function and effect]
The rotary drum conveyor 30 configured as described above and the rotary drum conveyor 10 of the first embodiment are sequentially replaced with nine feeding / transporting devices provided in a silo for temporarily storing dry raw materials, and the rotary drum conveyor 10 is replaced. 1 unit, with a configuration comprising 8 rotary drum conveyors 30
Since the dried material contains a large amount of lumps, it is not clogged or arched at the bottom of the silo, and the dried material can be smoothly drawn out from the cylindrical chute-shaped outlet at the bottom of the silo. It was.
The dry raw material thrown into the silo can be continuously pulled out without flashing, and the raw material is not deposited around the rotary drum conveyors 10 and 30 and the BC which is the next transporter.

Next, there was a question of whether or not the rotating drum conveyor 30 could feed and transport a lot of water, but it was found that a relatively good operation was possible.
Actually, abnormally high moisture content of the dry raw material occurs in a unique case where operation mistakes occur in combination with equipment troubles. In this case, the moisture content of the dry raw material exceeds 10%. Even in such a high state, after the trial introduction of the rotary drum conveyor 30, a situation in which the clogging occurs in the inlet end 31 a of the casing 31 of the rotary drum conveyor 30 or the casing 31 from the lower part of the silo occurs once. Not done.
The generated trouble is almost all clogged due to the arching phenomenon inside the silo, and no problem occurs in the rotary drum conveyor 30. This is because the rotating drum conveyor 30 is rotated so that even a raw material with a lot of moisture is drawn out from the outlet portion 34a formed in the chute shape of the inlet side connection casing 34.

It is a longitudinal cross-sectional view which shows the rotary drum conveyor of Example 1 in this invention. It is a cross-sectional explanatory drawing which shows the receiving roller part of a rotary drum conveyor same as the above. It is expansion sectional explanatory drawing which shows the entrance side seal structure of a rotary drum conveyor same as the above. It is expanded sectional explanatory drawing which shows the exit side seal structure of a rotary drum conveyor same as the above. It is a longitudinal cross-sectional view which shows the rotary drum conveyor of Example 2 in this invention. It is a top view which shows a rotary drum conveyor same as the above. It is expanded sectional explanatory drawing which shows the state which presses the inlet side seal structure of a rotary drum conveyor same as the above with a spring. It is expanded sectional explanatory drawing which shows the exit side seal structure of a rotary drum conveyor same as the above.

Explanation of symbols

10, 30 Rotating drum conveyors 11, 31 (Rotating) casing 11a Inlet portion 11b Outlet portion 11c Roller receiving portions 12, 32 Center shafts 13, 33 Screw blades 14, 34 Inlet side connecting casing (fixed casing for inlet side connection)
15, 35 Outlet connection casing (fixed casing for outlet connection)
16, 36 Shaft 17, 37 Flange 18 Roller 19 Strut 20 Beam member 20a Support member 21, 22, 44, 51 Seal member 23, 24, 40, 50 Seal structure 25, 26 Receiving portion 27a, 27b, 28a, 28b Seal member Support structure 27c Plate member 27d Base portions 29a, 29b Labyrinth plate 31a Inlet side end portion 31b Introduction portion 31c (Short spiral) blade 41 Spring 42, 52, 53 Seal member support structure 43 Receiving member 45 Support structure 46 Contact member 47 Screw part

Claims (7)

In the cylindrical rotating casing, a central axis and a screw blade standing on the outer periphery of the central axis are provided,
The outer peripheral end of the screw blade is fixed integrally with the inner peripheral surface of the rotating casing without any gap,
The end portion of the rotating casing is rotatably inserted into the fixed casing for connecting the inlet side, and the end portion on the outlet side is rotatably inserted into the fixed casing for connecting the outlet portion,
The central shaft protrudes outward from both ends of the rotary casing, is pivotally supported on one end side and connected to a drive source, and is rotatably supported on the outer peripheral side of the rotary casing fixed integrally on the other end side. And
The rotating drum conveyor, wherein the central shaft and the rotating casing rotate together during driving.   2. The rotary drum conveyor according to claim 1, wherein an end portion on the inlet side of the screw blade is inserted into the fixed casing for connection on the inlet side in a state of protruding from the end portion of the rotary casing together with the central axis. .   The rotary drum conveyor according to claim 2, wherein the moisture of the object to be fed or transported is used in the range of 0 to 30% by weight.   The rotary drum conveyor according to claim 1, wherein the outer peripheral surface of the rotary casing is supported by a plurality of rollers on the same cross section.   5. The rotary drum conveyor according to claim 4, wherein the outer periphery of the portion received by the roller of the rotary casing is doubled in a belt shape, and the outer peripheral surface of the doubling portion is processed into a perfect circle concentric with the central axis.   The sealing structure using a sealing member made of a flexible material is formed between the outer surface of the rotating casing, the fixed casing for connecting the inlet side, and the fixed casing for connecting the outlet portion. The rotating drum conveyor according to 1.   7. The rotary drum conveyor according to claim 6, wherein in the seal structure, the sliding surface abutting member is always pressed against the sliding surface by an urging force of an elastic member such as a spring.

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