JP5747693B2 - Flight conveyor - Google Patents

Description

  The present invention relates to a flight conveyor. In more detail, it is related with the flight conveyor used when conveying a concentrate.

In general, since copper concentrate contains about 10% by weight of water, the copper concentrate is dried to obtain a dry concentrate with a moisture content of 1% by weight or less, and then this dry concentrate is used for smelting. (For example, Patent Document 1).
For example, as shown in FIG. 10, copper concentrate with a water content of about 10% by weight is charged into a drying facility 1 such as a rotary steam dryer and dried to a water content of 1% by weight or less to become a dry concentrate. The dried concentrate is charged into the flight conveyor 3 through the chute 2 and is transported to the transport facility 4 by the flight conveyor 3. Then, the dried concentrate is supplied to the smelting furnace 6 after being supplied and stored in the concentrate bottle 5 by the transfer equipment 4.
Here, since the transporting facility 4 transports the dried concentrate by airflow, the flight conveyor 3 connected to the transporting facility 4 has an airtight structure surrounded by a casing. The flight conveyor 3 is also charged with water vapor from the drying facility 1 along with the dried concentrate. Therefore, the flight conveyor 3 is connected to the bag filter 7, and water vapor is sucked into the bag filter 7 together with the dry concentrate dust floating in the casing. The water vapor sucked by the bag filter 7 is discharged out of the system, and the dried concentrate dust is returned to the flight conveyor 3 again.

  As shown in FIG. 11, the flight conveyor 3 includes the casing 110, two chains 120 and 120 housed in the casing 110, and a number of flights 130 spanned over the two chains 120 and 120. It consists of and. The casing 110 is configured in a cylindrical shape having a quadrangular sectional view, which includes an upper surface 111, a bottom surface 112, and side walls 113 and 113. As for the chain 120, the chain 120 positioned above and below in FIG. 11 is a single annular chain 120, and is wound around a pair of sprockets (not shown). When one of the sprockets is rotationally driven, the chain 120 advances, and the flight 130 advances accordingly. Specifically, the flight 130 located below the casing 110 travels from the chute 2 toward the flow facility 4, and the dry concentrate loaded through the chute 2 is pushed by the flight 130 to flow the facility. 4 is transported. The flight 130 that has traveled to the flow facility 4 is circulated in the direction above the casing 110 from the flow facility 4 toward the chute 2.

By the way, when the dry concentrate is transported by the flight conveyor 3, the flight 130 may be lifted by the resistance of the dry concentrate, and the chain 120 may be lifted accordingly. Therefore, as shown in FIG. 12, an anti-lifting guide 150 is provided above the chain 120 traveling on the bottom surface 112. The lifting prevention guide 150 is a plate member that is long in the longitudinal direction of the chain 120, and is attached to the liner 114 attached to the side wall 113 via an L-shaped fitting 140.
By providing the lifting prevention guide 150 above the chain 120, the raised chain 120 can be pressed downward, and the chain 120 and the flight 130 can be prevented from lifting.
The liner 114 is provided to prevent the side wall of the chain 120 from coming into contact with the side wall 113 and making a hole in the casing 110 by making the side wall 113 thick.

  Most of the dried concentrate charged in the flight conveyor 3 is pushed by the flight 130 and conveyed to the transporting facility 4, but part of the dried concentrate is a space S between the chain 120 and the side wall 113. Leaks out. Since the casing 110 has an airtight structure, the dried concentrate once leaked into the space S is not easily discharged from the space S and stays there. Then, the dried concentrate staying in the space S absorbs the water vapor in the casing 110 and adheres to the bottom surface 112 and the liner 114. Further, when the chain 120 meanders and approaches the side wall 113, the adhering matter is pressed and hardened by the side surface of the chain 120, resulting in a very hard adhering matter X. This fixed object X is called “residence” and grows in a triangular shape in cross section at the corner of the bottom 112 and the liner 114.

  In the state where the residence X is generated, when the chain 120 meanders and approaches the side wall 113, the side surface of the chain 120 comes into contact with the residence X, and the residence 120 causes the chain 120 to wear and the strength is insufficient. There is a problem. If it does so, the lifetime of the chain 120 will become short, and since it is necessary to stop an operation | movement frequently in order to replace | exchange the chain 120, there exists a problem that operation efficiency will worsen and the expense concerning replacement | exchange will become high.

JP-A-9-53128

  In view of the above circumstances, an object of the present invention is to provide a flight conveyor that can suppress meandering of a chain and extend the life of the chain.

Flight conveyor of the first invention, casing and, a chain accommodated in the casing, a flight conveyor and a flight mounted on the chain, and flight shoe attached to the flight, before Symbol Chain A shoe guide for guiding the flight shoe so as to suppress meandering, and a mounting bracket for mounting the shoe guide to the casing. The shoe guide and the mounting bracket are configured as a unit having a predetermined length. The plurality of units are attached to the casing side by side in the length direction .
The flight conveyor according to a second aspect is characterized in that, in the first aspect, the unit comprises a lift prevention guide for preventing the chain from lifting, in addition to the shoe guide and the mounting bracket.
A flight conveyor according to a third aspect of the present invention is the flight conveyor according to the first or second aspect, wherein the flight shoe is attached to the flight at a predetermined interval in the longitudinal direction of the chain to such an extent that the chain meandering is suppressed. It is characterized by that.
According to a fourth aspect of the present invention, in the first, second, or third aspect, the flight shoe is easily attached to and detached from the flight.

According to the first invention, the meander of the chain can be suppressed by guiding the flight shoe to the shoe guide. Therefore, it can suppress that the side of a chain contacts and wears the concentrate of the concentrate which generate | occur | produced in the casing, and can extend the lifetime of a chain. Further, since the shoe guide and the mounting bracket are configured as a unit, maintenance such as replacement of the shoe guide is facilitated.
According to the second aspect of the present invention, the lifting prevention guide can hold down the chain that is lifted due to the resistance of the concentrate, and can prevent the chain and the flight from rising.
According to the third aspect, by reducing the number of flight shoes, the frequency of contact of the flight shoes with the shoe guide is reduced, and wear of the shoe guide can be suppressed.
According to the fourth invention, since the flight shoe is easily attached to and detached from the flight, the flight shoe can be easily replaced when the flight shoe is worn.

It is a section view partial enlarged view of the flight conveyor concerning one embodiment of the present invention. It is the II-II arrow directional view in FIG. It is the III-III arrow directional view in FIG. It is the IV-IV arrow directional view in FIG. It is a section view partial enlarged view of the flight conveyor concerning other embodiments. It is side view sectional drawing of the flight conveyor which concerns on one Embodiment of this invention. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. It is a top view of a chain and a flight. It is a side view of a chain and a flight. It is the schematic of the installation in which a flight conveyor is used. It is sectional drawing of the conventional flight conveyor. It is a section view partial enlarged view of the conventional flight conveyor.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 6 and 7, a flight conveyor A according to an embodiment of the present invention includes a casing 10, two chains 20 and 20 housed in the casing 10, and two chains 20 and 20. It is composed of a large number of flights 30 spanning 20. This flight conveyor A is used, for example, to load the dried concentrate dried by a drying facility such as a rotary steam dryer from the chute 2 and transport it to the flow facility 4.

  The casing 10 of the flight conveyor A is configured in an airtight cylindrical shape having a quadrangular sectional view, which includes an upper surface 11, a bottom surface 12, and side walls 13 and 13. The chain 20 has an annular shape and is wound around a pair of sprockets 70 and 70. Then, when one of the sprockets 70 is rotationally driven, the chain 20 advances, and the flight 30 advances accordingly. Specifically, the flight 30 located below the casing 10 advances from the chute 2 toward the flow facility 4, and the dry concentrate loaded through the chute 2 is pushed by the flight 30 and the flow facility. 4 is transported. Then, the flight 30 that has traveled to the flow facility 4 is circulated in the direction above the casing 10 from the flow facility 4 toward the chute 2.

  As shown in FIGS. 8 and 9, the chain 20 is configured by connecting a plurality of chain pieces 21 with connecting pins 22. A recess 23 is formed on the inner side surface of the chain piece 21. The two chains 20, 20 are disposed on both side edges of the flight 30, and the flights 30 are fixed to the chain 20 by inserting lower end portions of both side edges of the flight 30 into the recesses 23.

A scraper plate 24 is provided on the outer side surface of the chain piece 21. The scraper plate 24 may be anything that is hard and protrudes from the outer side surface of the chain piece 21. For example, the scraper plate 24 may be formed by welding a square pillar steel material to the outer side surface of the chain piece 21 and further hardening the surface thereof.
Further, the scraper plate 24 may be provided on all chain pieces 21 or may be provided on some chain pieces 21 at predetermined intervals.

As shown in FIG. 7, a lift prevention guide 50 and a shoe guide 60 are attached to both side walls 13, 13 of the casing 10 via attachment fittings 40, respectively.
As shown in FIGS. 1, 2, and 3, the mounting bracket 40 includes a fixing plate 41 that is fixed to the side wall 13, an L-shaped bracket 42 that fixes the lift prevention guide 50 and the shoe guide 60, and the fixing plate 41. It comprises a plurality of ribs 43 that connect the L-shaped bracket 42.

The lifting prevention guide 50 is a plate member that is long in the longitudinal direction of the chain 20, and is fixed to the horizontal portion of the L-shaped metal fitting 42. The lift prevention guide 50 is provided above the chain 20 that travels on the bottom surface 12, and the chain 20 and the flight 30 are lifted by pressing down the chain 20 that is lifted by the resistance of the dried concentrate to be conveyed. It is preventing.
Here, the lifting prevention guide 50 is provided such that a gap g is formed between the side edge thereof and the side wall 13 of the casing 10.

The shoe guide 60 is a plate member that is long in the longitudinal direction of the chain 20, and is fixed to a vertical portion of the L-shaped metal fitting 42. A flight shoe 61 is attached to the side edge of the flight 30, and the flight shoe 61 comes into contact with and is guided by the shoe guide 60 to suppress meandering of the chain 20.
Here, the clearance between the shoe guide 60 and the flight shoe 61 is configured to be smaller than the distance between the side wall 13 and the chain 20. In order to configure in this way, it is preferable not to provide the liner provided in the conventional flight conveyor on the side wall 13 of the casing 10 because the interval between the side wall 13 and the chain 20 can be increased. Of course, if the clearance between the shoe guide 60 and the flight shoe 61 can be configured to be smaller than the distance between the side wall 13 and the chain 20, a liner may be provided on the side wall 13.

The mounting bracket 40, the anti-lifting guide 50, and the shoe guide 60 are formed to have a predetermined length and are configured as one unit u. By mounting the unit u side by side on the side wall 13 of the casing 10, the lift prevention guide 50 and the shoe guide 60 are provided over the entire length of the flight conveyor A. By using the unit u as described above, maintenance such as replacement of the lift prevention guide 50 and the shoe guide 60 is facilitated.
Note that the lift prevention guide 50 has its both ends bent upward so that the chain 20 is not caught at the seam of the unit u. Both ends of the shoe guide 60 are also bent toward the side wall 13 so that the flight shoe 61 is not caught at the joint of the unit U.

  As shown in FIG. 4, the flight shoe 61 is a member made of stainless steel and formed in an L shape in plan view, and a surface facing the shoe guide 60 is subjected to wear-resistant thermal spraying. Further, the flight shoe 61 is attached to the side edge of the flight 30 with bolts and nuts, so that it can be easily attached and detached. Therefore, when the flight shoe 61 is worn, it can be easily replaced.

The flight shoes 61 may be attached to all the flights 30 or may be attached to some of the flights 30 at predetermined intervals. The space | interval which provides the flight shoe 61 can be set in the range which can suppress the meandering of the chain 20. FIG. For example, if one flight shoe 61 is attached to four of the flights 30, the meandering of the chain 20 can be suppressed, and if one flight shoe 61 is attached to five of the flights 30, the chain 20 between the two flight shoes 61. In such a case, the flight shoe 61 is preferably attached to one of the four flights 30.
Thus, by reducing the number of flight shoes 61, the frequency of the flight shoes 61 coming into contact with the shoe guides 60 is reduced, and wear of the shoe guides 60 can be suppressed. Further, the cost for attaching the flight shoe 61 can be reduced.

As shown in FIG. 1, most of the dry concentrate C charged in the flight conveyor A is pushed and transported by the flight 30, but a part of the dry concentrate C is formed between the chain 20 and the side wall 13. It leaks into the space S between. The dry concentrate C leaking into the space S discharges water vapor due to residual heat, and when the dry concentrate C absorbs the water vapor again, it adheres to the side wall 13 and causes a presence.
Here, since a gap g is formed between the lift prevention guide 50 and the side wall 13 of the casing 10, the dried concentrate C that has leaked into the space S is discharged from the gap g and generation of a residence X occurs. Can be reduced. However, there is a case where the residence X still occurs.

However, since the flight shoe 61 is guided by the shoe guide 60 as described above, the meandering of the chain 20 can be suppressed. Therefore, even if the presence X occurs in the casing 10, the side surface of the chain 20 remains. It is possible to suppress wear due to contact with the appendage X, and the life of the chain 20 can be extended.
Therefore, the frequency | count of the stop of the operation | movement for replacing | exchanging the chain 20 can be decreased, operational efficiency is good, and cost becomes low.

(Other embodiments)
As shown in FIG. 5, in the flight conveyor A according to the above embodiment, the lifting prevention guide 50 may be provided so as to be in contact with the side wall 13 of the casing 10 so as not to leave the gap g.
In this case, the dried concentrate C leaking into the space S is not discharged, and a residence X is generated in the casing 10. However, since the flight shoe 61 is guided by the shoe guide 60, the meandering of the chain 20 is suppressed, so that the side surface of the chain 20 is in contact with the living X and is worn until the living X grows greatly. Therefore, the life of the chain 20 can be extended.

Next, the effect will be described with reference to examples.
(Comparative example)
When the flight conveyor having the conventional configuration shown in FIG. 12 was used, the chain 120 was worn out by the presence X, so that it was necessary to replace the chain 120 once every 3 to 4 months.

Example 1
When the flight conveyor of the present invention having no gap g shown in FIG. 5 was used, the chain had to be replaced once every eight months.
Therefore, it has been found that the life of the chain 20 is twice as long as that of a conventional flight conveyor.

(Example 2)
When operated with the flight conveyor of the present invention having a gap g shown in FIG. 1, the wear of the chain 20 was enough to withstand use even after 14 months.
For this reason, it has been found that the life of the chain 20 is more than three times longer than that of a conventional flight conveyor.

DESCRIPTION OF SYMBOLS 10 Casing 13 Side wall 20 Chain 21 Chain top 22 Connecting pin 23 Recess 24 Scraper 30 Flight 40 Mounting bracket 41 Fixing plate 42 L-shaped bracket 43 Rib 50 Lift prevention guide 60 Shoe guide 61 Flight shoe

Claims (4)

A flight conveyor comprising a casing, a chain housed in the casing, and a flight attached to the chain,
A flight shoe attached to the flight ;
And a shoe guide for guiding the flight shoe so as to suppress the meandering of the previous Symbol chain,
A mounting bracket for attaching the shoe guide to the casing,
The shoe guide and the mounting bracket are configured as a unit having a predetermined length,
A flight conveyor , wherein the plurality of units are attached to the casing side by side in the length direction .   In addition to the shoe guide and the mounting bracket, the unit includes a lift prevention guide that prevents the chain from lifting.
The flight conveyor according to claim 1. The flight conveyor according to claim 1, wherein the flight shoe is attached to the flight at a predetermined interval in the longitudinal direction of the chain to such an extent that the meandering of the chain is suppressed. The flight conveyor according to claim 1, wherein the flight shoe is easily attached to and detached from the flight.

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