JP2020142879A - Chain-type conveyor apparatus - Google Patents

Abstract

To provide a chain-type conveyor apparatus allowing for eliminating the slide noise or resistance to transport occurring during conveyance of a particulate matter in a duct.SOLUTION: A chain-type conveyor apparatus 10 in the present invention has a supply port 22 for a particulate matter at one end and a discharge port 24 at the other end, a duct 1 having a hopper 26 between the supply port and the discharge port, a driving sprocket 30 and a driven sprocket 32 that are arranged in the duct, a conveyor chain 2 that is stretched over the driving sprocket and the driven sprocket and moves cyclically, carrying plates 3 that extend in directions intersecting with a transport direction from both side faces of the conveyor chain and push the particulate matter in the duct in the transport direction due to circulatory movement of the conveyor chain. In the chain-type conveyor apparatus, a rail 4 over which the conveyor chain on a feed side rotationally moves is laid on an underside along a transport direction of the duct and an open portion 40 is comprised by cutting the rail on the hopper to a predetermined length.SELECTED DRAWING: Figure 1

Description

The present invention relates to a chain type conveyor device capable of continuously transporting powders and granules of coal, gypsum, wood flour, grains and the like by a transport plate made of a scraper or the like.

There is a chain type conveyor as a device for transporting powdered coal, gypsum, wood flour, grains, etc. in an almost horizontal direction. This chain type conveyor accepts powders and granules to be transported into the space of a duct having a square cross section formed long in the transport direction and transports and moves them in the duct space (for example, disclosed in Patent Documents 1 and 2). ..
3A and 3B are explanatory views of a conventional chain type conveyor device, where (1) is a partially enlarged plan view, (2) is a partially enlarged side view, and (3) is a partially enlarged front view. A conveyor chain 2 is attached to the bottom surface of the duct 1, and a conveyor plate 3 that pushes powder or granular material in the transport direction is attached to the left and right sides of the conveyor chain 2, and the conveyor chain 2 is connected endlessly in the longitudinal direction of the duct 1 space. The powder or granular material is received from one side and discharged to the other destination (see FIG. 3 (1)). At this time, the conveyor chain 2 on the feed side rotates and moves on the rail 4 continuously provided along the longitudinal direction of the lower surface of the duct 1 (see FIG. 3 (2)).
As the discharge portion, a structure is generally adopted in which an opening is provided at the bottom of the space and the powder or granular material scraped by the conveyor chain 2 and the transport plate 3 is dropped.

At this time, the transport amount per unit time is determined by the filling amount of the space for transporting the powder or granular material. When the filling amount is large (the transport load is large), the powder particles are transported while sliding on the inner wall of the square cross section, and the conveyor chain 2 and the transport plate 3 are freed by the reaction force and its own weight in the moving direction of the powder particles. The conveyor chain 2 is conveyed and moved in the pulling direction without any movement.
In the chain type conveyor, the transport plate 3 fixed to the inner or outer link (hereinafter, also simply referred to as a link), the transported object, and the inner wall of the duct 1 are in direct contact with each other, and the chain type conveyor slides between them for transport. The transported object that has entered between the links moves in the transport direction while rubbing against the inner wall of the duct 1 and the rail 4 without being discharged. The roller is configured to roll on the rail 4 of the duct 1. In particular, when the rail 4 is worn due to sliding wear, not only the link but also the transport plate 3 comes into contact with the inner wall of the duct 1, and equipment sliding noise is generated. , It causes an increase in transport resistance (see FIG. 3 (3)).

Japanese Unexamined Patent Publication No. 2003-237924 Japanese Patent No. 5931651

The problem to be solved by the present invention is a chain type capable of eliminating sliding noise and transport resistance generated during transport and movement of powder or granular material in a duct and reducing sliding wear in view of the above-mentioned problems of the prior art. To provide a conveyor device.

In the present invention, as a first means for solving the above-mentioned problems, a duct having a powder / granule supply port at one end, a discharge port at the other end, and a hopper between the supply port and the discharge port, and the above-mentioned A drive sprocket and a driven sprocket arranged in a duct, a conveyor chain that circulates across the drive sprocket and the driven sprocket, and a conveyor chain that extends from both sides of the conveyor chain in a direction intersecting the transport direction to circulate the conveyor chain. In a chain type conveyor device having a transport plate for pushing out the powders and granules in the duct in the transport direction with movement.
A chain type characterized in that a rail on which the conveyor chain on the feed side rotates is laid on the lower surface along the transport direction of the duct, and an open portion obtained by cutting the rail on the hopper to a predetermined length is provided. The purpose is to provide a conveyor device.
According to the first means, the powder or granular material sandwiched between the links of the conveyor chain can be discharged to the hopper below the duct by its own weight, and the sliding wear of the conveyor chain and the rail can be prevented. In addition, sliding noise due to contact between the transport plate and the inner wall of the duct due to rail wear can be suppressed. Furthermore, the transport resistance of the conveyor device can be reduced, and energy saving can be expected.

The present invention is characterized in that, as a second means for solving the above problems, in the first means, the open portion is formed to have a length of 1 pitch or more and less than 2 pitches of the conveyor chain. The purpose is to provide a type conveyor device.
According to the second means, the conveyor chain does not fall into the open portion, the conveyor chain can be smoothly transported, and wear due to contact between the open portion and the conveyor chain and noise generated by the contact can be prevented. In addition, a space can be obtained for discharging the powder or granular material between the links to the lower hopper.

According to the present invention, as a third means for solving the above problem, in the first or second means, the open portion is vibrated with respect to the powder or granular material sandwiched in the link of the conveyor chain. It is an object of the present invention to provide a chain type conveyor device provided with a wiping means for blowing air or blowing air.
According to the third means, even when viscous powder or granular material that cannot be removed by dropping by its own weight is sandwiched between the links, it can be efficiently removed at the open portion.

According to the present invention, as a fourth means for solving the above-mentioned problems, in any one of the first to third means, the powder particles deposited between the links of the conveyor chain are formed in the open portion. It is an object of the present invention to provide a chain type conveyor device characterized by providing a flapper that pushes downward.
According to the fourth means, the powder or granular material accumulated between the links of the conveyor chain is efficiently pushed out to the hopper below the duct by the flapper during the transport movement of the powder or granular material to reduce the sedimentary layer pressure of the flapper. It can be oscillated by pendulum movement.

According to the present invention, it is possible to eliminate powder or granular material caught in the link of the conveyor chain, and it is possible to prevent sliding wear of the conveyor chain and rail. In addition, sliding noise due to contact between the transport plate and the inner wall of the duct due to rail wear can be suppressed. Furthermore, the transport resistance of the conveyor device can be reduced, and energy saving can be expected.

It is a schematic block diagram of the chain type conveyor device of this invention. It is a partially enlarged view of the conveyor chain on the hopper. It is explanatory drawing of the conventional chain type conveyor device.

An embodiment of the chain type conveyor device of the present invention will be described in detail below with reference to the drawings.
[Chain type conveyor device 10]
FIG. 1 is a schematic configuration diagram of the chain type conveyor device of the present invention. FIG. 2 is a partially enlarged view of the conveyor chain on the hopper, (1) is a side sectional view, and (2) is a view taken along the line AA of (1). As shown in the figure, the chain type conveyor device 10 of the present invention (hereinafter, may be simply referred to as a conveyor device 10) has a supply port 22 for powder and granules 12 at one end, a discharge port 24 at the other end, and a supply port 22 and discharge. A duct 1 having a plurality of hoppers 26 between outlets 24, a drive sprocket 30 and a driven sprocket 32 arranged in the duct 1, a conveyor chain 2 that circulates across the drive sprocket 30 and the driven sprocket 32, and a conveyor chain. The conveyor plate 3 that extends from both side surfaces of 2 in a direction intersecting the transport direction and pushes out the powder and granules 12 in the duct 1 in the transport direction, and the rail 4 on which the conveyor chain 2 on the feed side rotates and moves are transported by the duct 1. It is provided with an open portion 40 (see FIG. 2) laid on the lower surface along the direction and the rail 4 on the hopper 26 is cut to a predetermined length.

The hopper 26 is a discharge port for delivering the powder or granular material 12 being transported to the transport device in the next step on the way, and is provided at a predetermined position on the lower surface of the duct 1.
The rail 4 is a lower surface of the duct 1 and is continuously provided along the longitudinal direction at a position facing the roller of the conveyor chain 2. During the transport movement of the powder or granular material 12, the rollers of the conveyor chain 2 are rotationally moving on the rail 4.
In such a configuration of the hopper 26 and the rail 4, the rail 4 laid on the lower surface of the duct 1 along the longitudinal direction conventionally extends to the upper surface of the hopper 26, in other words, the opening on the bottom surface of the duct 1 (rail 4). Only) is installed. However, the rail 4 on the hopper 26 of the present invention is provided with an open portion 40 (partially) cut to a predetermined length. The length of the opening portion 40 is formed to be at least 1 pitch of the conveyor chain 2 (1 pitch of the present embodiment means the length between the rollers of the link) and less than 2 pitches. As a result, the conveyor chain 2 does not fall on the open portion 40, the conveyor chain 2 can be smoothly transported, and noise due to contact between the open portion 40 and the conveyor chain 2 can be prevented.

A pay-off means 50 is provided above the conveyor chain 2 of the hopper 26. The paying means 50 pays the powder or granular material 12 sandwiched in the link to the hopper 26 via the lower opening portion 40. The wiping means 50 may have a configuration capable of wiping off the powder or granular material 12 sandwiched in the link. For example, the compressed air supply means for blowing compressed air (in FIG. 2, the nozzle of the compressed air supply means is used). Disclosure), vibration means such as a hammer or a vibrator can be applied.
A flapper 60 is provided above the conveyor chain 2 of the hopper 26. The flapper 60 is provided directly above the opening portion 40 sandwiching the conveyor chain 2 in between. The flapper 60 is attached so as to hang down from a rotary shaft 62 extending in a direction orthogonal to the transport direction and rotatably supported on both side surfaces of the duct 1 toward the conveyor chain 2 below and pendulum movement. The tip of the flapper 60 is arranged with a gap between it and the conveyor chain 2, and does not come into contact with the conveyor chain 2 and the conveyor plate 3 when rotating (pendulum movement) around the axis of the rotating shaft 62. Further, the rotating shaft 62 is provided with a weight 64 extending radially from the axis. When the flapper 60 comes into contact with the powder or granular material 12 deposited on the conveyor chain 2 and is pushed in the transport direction, the weight 64 applies a predetermined pressing force (reaction force) to the powder or granular material 12 on the conveyor chain 2. It is a weight that scrapes off from above and pushes out the powder or granular material between the links downward. The weight 64 is attached to a rotating shaft 62 protruding from the side surface of the duct 1 so that the weight can be arbitrarily changed according to the type and amount of the powder or granular material 12.

[Action]
The operation of the chain type conveyor device 10 of the present invention according to the above configuration will be described below.
As shown in FIG. 1, the conveyor device 10 of the present embodiment is installed and used in a storage silo that stores coal or biomass as fuel in a power plant or the like. Coal and biomass fuel (for example, wood flour, wood pellets, etc.) are transported by ship, vehicle, freight car, etc. from various places and accepted by the hopper. This delivery is not continuous, but once it is received in a yard or a large container, it is mixed for the purpose of adjusting the water content and calorific value of coal and biomass fuel, which have different physical properties depending on the production area. After this adjustment, it is stored in a storage silo by the conveyor device 10 and transported to a fuel-using facility (power plant, heat utilization factory, etc.) in the subsequent stage. At this time, the coal and biomass fuel are weighed and discharged from the storage silos, respectively, and blended to be used as fuel so as to meet the calorific value required by the fuel-using equipment.
The powder or granular material 12 supplied from the supply port 22 of the duct 1 is temporarily piled up in the duct 1 below the supply port 22 of the duct 1, and the conveyor chain 2 is conveyed and moved while being buried in the powder or granular material 12. The transport plate 3 moves in the duct 1 by a chain tension in the horizontal direction orthogonal to the layer pressure in the vertical direction of the powder or granular material 12. The larger the filling amount of the powder or granular material 12 in the duct 1, the larger the chain tension. At this time, the amount of sliding wear between the powder or granular material 12 and the inner wall of the duct 1 also increases. Conventionally, the powder or granular material 12 accumulated between the links of the conveyor chain 2 slides without being discharged during the transfer movement, which causes wear of the equipment. In particular, the powder or granular material 12 deposited between the links is compacted and hardened, and the sliding wear is accelerated. Further, the rollers and rails 4 of the conveyor chain 2 that constantly rotate and move in the powder or granular material 12 have more opportunities to slide with the powder or granular material 12 than others, so that the amount of wear increases.

In the present invention, the open portion 40 is provided on the rail 4 on the hopper 26, and the powder or granular material 12 deposited in the link is discharged to the hopper 26 via the open portion 40.
Further, with respect to the powder or granular material 12 having high viscosity and not falling by its own weight, the powder or granular material in the link and the powder or granular material 12 on the conveyor chain 2 are combined by the combination of the paying means 50 provided above the opening portion 40 in the duct 1. Has been paid off.
Further, a flapper 60 provided above the inside of the duct 1 of the opening portion 40 may be combined. The flapper 60, which comes into contact with the transporting and moving powder or granular material 12 and causes a pendulum movement with a predetermined load, can scrape the powder or granular material between the links and scrape the powder or granular material from the conveyor chain 2 and further between the links. The powder or granular material can be pushed downward by the flapper 60.
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
Further, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

The chain type conveyor device of the present invention has industrial applicability, especially in storage and transportation equipment for powders such as coal, gypsum, wood flour, and grains.

1 Duct 2 Conveyor chain 3 Conveyor plate 4 Rail 10 Chain type conveyor device 12 Powder and granular material 22 Supply port 24 Discharge port 26 Hopper 30 Drive sprocket 32 Driven sprocket 40 Open part 50 Discharge means 60 Flapper 62 Rotating shaft 64 Weight

Claims (4)

A supply port for powder and granules at one end, a discharge port at the other end, a duct having a hopper between the supply port and the discharge port, a drive sprocket and a driven sprocket arranged in the duct, the drive sprocket and the driven sprocket. A conveyor chain that circulates across a sprocket and extends from both sides of the conveyor chain in a direction intersecting the transport direction, and pushes out the powders and particles in the duct in the transport direction as the conveyor chain circulates. In a chain type conveyor device having a transport plate and
A chain type characterized in that a rail on which the conveyor chain on the feed side rotates is laid on the lower surface along the transport direction of the duct, and an open portion obtained by cutting the rail on the hopper to a predetermined length is provided. Conveyor device. The chain type conveyor device according to claim 1.
A chain type conveyor device characterized in that the open portion is formed to have a length of 1 pitch or more and less than 2 pitches of the conveyor chain. The chain type conveyor device according to claim 1 or 2.
A chain-type conveyor device characterized in that the open portion is provided with a wiping means for vibrating or blowing air on the powder or granular material sandwiched in the link of the conveyor chain. The chain type conveyor device according to any one of claims 1 to 3.
A chain type conveyor device characterized in that the open portion is provided with a flapper for pushing down the powder or granular material accumulated between the links of the conveyor chain.

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