JPH10152213A - Belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-floating type belt conveyor device to perform feeding in a curved manner. SOLUTION: A device having belt supporting troughs 10, 12 provided with inlets 22a, 32a of the compressed air for floating a belt on an endless carrier side belt and an return side belts 1a, 1b in the belt traveling direction, is provided with a device to invert upper and lower sides of the belt by a driving pulley and a tail pulley at its end part, and the belt supporting troughs 10, 12 are formed of a pair of upper and lower horizontal cylindrical or elliptical steel tubes. The carrier side belt 1a is supported by the lower inner surface of a horizontal tube P and the return side belt 1b is supported by the lower inner surface of a horizontal tube Q, compressed air pipes 24, 32 are connected to lowest air inlets 22a, 32a of the horizontal tubes P, Q, compressed air outlet 24, 34 are provided in the horizontal tubes, a hot air generation device and pipe are provided in the upper and lower horizontal tubes, a temperature sensor and a humidity sensor are arranged inside and outside the horizontal tubes to flow the hot air whose differential temperature and humidity between the outside and the inside, and a bent feeding parts are provided in the right-to-left and vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device, and more particularly, to a pneumatic belt capable of supporting a carrier side belt and a return side belt with a pair of upper and lower horizontal tubes, respectively, and carrying the belt while floating with compressed air. Conveyor, and at the desired location, left or right, or
The present invention relates to a belt conveyor device that has a curved section that is arbitrarily curved in the vertical direction. It is a belt conveyor device that is capable of performing a curved course with anticorrosion measures and capable of transporting a large amount of goods at high speed over a long distance. Can be supplied at low equipment costs.

[0002]

2. Description of the Related Art In a conventional carrier type flat belt conveyor device, a belt for loading and transporting a conveyed product is provided on a central support roller and a pair of left and right side rollers arranged at a plurality of locations at substantially equal intervals in the belt traveling direction. The conveyed material is transferred while rolling and moving. Similarly, the return side belt is configured to roll and move on return rollers arranged at a plurality of locations. Then, a cross beam-shaped pedestal (conveyor frame) that supports these support rollers, side rollers, and return rollers at appropriate intervals in the belt running direction is supported on the ground via a plurality of pillars. I have.

[0003]

However, in such a conventional belt conveyor device, a large amount of power is required to convey a large amount of conveyed objects over a long distance, and various types of rollers are required. There were the following problems due to restrictions on rotational resistance and rotational speed. It was difficult to increase the speed due to the restriction of the belt conveyance speed. The work environment was degraded due to the noise generated by the rotation of the rollers. Labor was required to maintain a large number of rollers. There was vibration of the equipment due to the rotation of the rollers. Life is short due to wear due to belt rolling and sliding. Since the load side of the belt on the return side is on the lower side, some of the load attached to the load side may fall off during traveling on the return side and fall off, polluting the inside of the equipment and the surrounding environment. there were. In the carrier-type flat belt conveyor, a certain amount of tension must be applied to the belt on the carrier side in order to eliminate slack between two adjacent rollers in the belt running direction. Because it was close to the inside, the curvature was limited and it was not suitable for running. In addition, in carrier type flat belt conveyors,
Since the belt on the return side is flat and transported in a horizontal state, there is also a problem that it is difficult to provide a curvature. If the transported material is coal or other chemical substances, if the temperature difference or humidity difference inside the horizontal tube exceeds a certain value during operation or sudden rotation due to weather conditions, dew condensation will occur on the inner surface of the horizontal tube, and this moisture and It reacts with impurities and chemical substances in coal to produce sulfuric acid components, which corrode and damage horizontal pipes (steel pipes) and shorten the life of belts.

[0004]

[Means for Solving the Problems] By solving the above problems,
In order to prevent corrosion damage and to supply a belt conveyor device which can be bent and has a low equipment cost, in the present invention, in the first invention, the endless belt and both the carrier side and the return side of the belt are provided. A belt conveyor device comprising an air-floating belt conveyor having a belt support trough provided with a plurality of compressed air injection holes for lifting a belt in a belt traveling direction, wherein the belt conveyor device is inverted by a driving pulley at an edge of the belt conveyor device. A belt reversing device is provided for reversing the upper and lower surfaces of the return side belt immediately after the reversing and the return side belt immediately before reversing by the tail pulley at the edge of the belt conveyor device. And a horizontal pipe made of a cylindrical pipe or an elliptical pipe formed of a steel pipe of And a return side belt is supported on a lower inner surface of a lower horizontal tube of the pair of horizontal tubes, and is formed at a lowermost portion of each of the horizontal tubes. A compressed air pipe connected to a pressure air source and supplying compressed air to the injection hole and extending along a belt running direction is connected to a lower portion of the injection hole, and the horizontal tube discharges the compressed air after the belt floating action. Provide an exhaust port,
A hot air generator and a hot air pipe are provided for supplying hot air into the pair of upper and lower horizontal tubes, respectively, and a temperature sensor and a humidity sensor are disposed inside and outside an arbitrary portion of the pair of upper and lower horizontal tubes, respectively. Together, the temperature sensor and the humidity sensor receive the temperature and humidity signals detected every moment to calculate the inside / outside temperature difference and inside / outside humidity difference, and when the temperature difference or the humidity difference falls within a preset set range, A control device for transmitting an operation command to supply hot air into the horizontal tube to the hot air generating device, wherein the pair of upper and lower horizontal tubes are the same in a horizontal direction or a vertical direction at an arbitrary position in a longitudinal direction. It has a configuration having a curved portion curved at the curvature of.

According to a second aspect of the present invention, in the first aspect, when an elliptical tube is used as the pair of upper and lower horizontal tubes, the ratio of the long side to the short side of the steel elliptic tube is 1.5 or less. In addition, the radius of curvature at the curved portion of the pair of upper and lower horizontal pipes is 35 times or more the pipe diameter in the case of a steel pipe cylindrical pipe, and 25 m times or more of the pipe average diameter in the case of a steel pipe elliptic pipe. Further, in the third invention, the belt reversing device according to the first or second invention is such that the belt cross section is U-shaped at at least one of the inlet portion and the outlet portion of the upper horizontal pipe and the lower horizontal pipe. And a bending guide device having a belt cross-section in which a plurality of rollers to be bent are arranged in the same cross-section. In the fourth invention, a horizontal scissor roller provided on the pulley side, a cylindrical support roller provided on the lower cylindrical tube side, and a cylindrical member having the same cross section provided at an intermediate portion between the two rollers. A rounding roller composed of a plurality of arranged rounding rollers, or a pair of upper and lower inclined inner pressing rollers for supporting both ends of a bent belt and both ends of a bent belt from the inside, respectively, or an inclined support. It is formed by an inclined roller that projects at a plurality of locations separated by a certain distance in the axial direction and sequentially projects at a protruding angle and abuts and rolls on the back surface of the belt. Further, in a fifth invention, in the first to third inventions, a pair of upper and lower retainers rolling between the belt reversing device and the lower cylindrical tube by contacting the upper and lower surfaces of the cross-section central portion of the return side belt. A trough forming device is provided which comprises a pair of upper and lower scissoring rollers which roll by rolling the roller and both ends of the return belt at an angle, and forming a belt cross section in a bowl shape. In the sixth invention, the inner surface or the outer surface of the horizontal tube is subjected to hot-dip galvanizing, hot-dip aluminum plating, or diffusion chrome plating to prevent corrosion damage due to dew condensation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, there is provided a belt support trough provided with an endless belt and a plurality of compressed air injection holes for floating the belt on both a carrier side and a return side of the belt in the belt running direction. A belt conveyor device comprising an air-floating belt conveyor having
A belt reversing device for reversing the upper and lower surfaces of the return belt immediately after being reversed by the driving pulley at the edge of the belt conveyor device and the return belt just before being reversed by the tail pulley at the edge of the belt conveyor device. The belt support trough is formed by a horizontal pipe made of a pair of upper and lower steel pipes or a cylindrical pipe or an elliptical pipe, and the carrier side belt is a lower part of the upper horizontal pipe of the pair of horizontal pipes. The return belt is supported on the inner surface, and the return side belt is supported on the lower inner surface of the lower horizontal pipe of the pair of horizontal pipes. And a compressed air pipe extending in the running direction of the belt for supplying compressed air to the injection hole and connected to the horizontal pipe, and discharging the compressed air after the belt floating action to the horizontal pipe. A hot air generator and a hot air pipe for providing hot air into the pair of upper and lower horizontal pipes, and a temperature sensor and a humidity sensor at an arbitrary position inside and outside the pair of upper and lower horizontal pipes, respectively. And the temperature sensor and the humidity sensor receive the temperature and humidity signals detected every moment to calculate the inside / outside temperature difference, and when the inside / outside temperature difference in the inside humidity falls within a set range set in advance. Comprises a control device for transmitting an operation command to supply hot air into the horizontal pipe to the hot air generator, and the pair of upper and lower horizontal pipes are located at any position in the longitudinal direction, in the left-right direction or up and down. Since it is configured to have a curved portion curved at the same curvature in the direction, it is possible to provide a curved portion having an arbitrary curvature within a range that does not interfere with necessary portions, and The belt running by moving while air floating, closed structure fast continuously transported was able conveyed at.

Further, by measuring the temperature difference and the humidity difference between the inside and outside of the horizontal pipe, when there is a risk of dew condensation, hot air can be supplied to the inside of the horizontal pipe to prevent it and prepare for corrosion. Then, the return side belt is reversed by the belt reversing device and then enveloped in a substantially cylindrical shape, and since the belt overlap portion is located above, the return side belt is transferred in a state where there is no ore dropping of the transported goods. You. In addition, since the belt whose cross section is bent in a U-shape on the carrier side in the upper horizontal pipe passes through the lower horizontal pipe while being bent in the U-shape on the return side as well, compared with a belt that is not inverted on the return side. The wear phenomenon due to the sliding operation on the inner surface of the horizontal pipe at the end of the belt is reduced, and the life of the belt is extended.

In the second invention, the condition for adopting a pair of upper and lower horizontal pipes having a curved portion is grasped, so that there is no trouble in bending the horizontal pipes and the belt is damaged during running. The minimum radius of curvature of a cylindrical tube or an elliptical tube with a smooth and curved belt deformed without any difficulty in actual operation was presented.

According to the third aspect of the present invention, a belt cross-section bending guide device in which a plurality of rollers for bending the belt cross-section into a U-shape are arranged in the same cross-section is provided. Since the belt is guided into the cylindrical tube without abrasion, abrasion of the belt edge can be avoided.

[0010] In the fourth invention, the belt reversing device is provided with a horizontal scissor roller provided on the pulley side, a cylindrical support roller provided on the lower cylindrical tube side, and an intermediate portion between the two rollers. It is composed of a plurality of rounding rollers arranged in a cylindrical shape on the same cross section, or a pair of upper and lower inclined inner pressing rollers for supporting both ends of a bent belt and both ends of a bent belt from the inside, respectively. Rolling roller,
Alternatively, the belt can be easily and easily inverted because the projection is formed by changing the projection angle sequentially at a plurality of locations separated by a fixed distance in the axial direction from the inclined support and projecting from the inclined support to abut and roll on the back surface of the belt.

Further, in the fifth invention, the trough forming device is disposed between the belt reversing device and the lower cylindrical tube, and the U-shaped trough is formed along the inner surface of the cylindrical tube for guiding the belt after reversing in advance. Since the belt is formed in a cross section, the belt is smoothly introduced into the cylindrical pipe without contacting the edge portion with the inner surface of the cylindrical pipe, so that unnecessary wear phenomenon is prevented. In the sixth aspect, the inner surface or outer surface of the horizontal tube is subjected to hot-dip galvanizing, hot-dip aluminum plating, or diffusion chrome plating, so that dew condensation occurs on the inner surface or outer surface of the horizontal tube to prevent corrosion damage due to sulfuric acid components and other acids. This can be prevented (in this case, the supply of warm air can be omitted).

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 17 relate to an embodiment of the present invention, FIG. 1 is an overall side view of a belt conveyor device (first embodiment), FIG. 2 is a longitudinal sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a schematic perspective view of a belt reversing device, FIG. 5 is a schematic perspective view of a belt reversing device showing another embodiment, and FIG. FIG. 7 is a cross-sectional view of a main part of a belt reversing device showing another embodiment. FIG. 8 is an overall side view of a belt conveyor device (second embodiment) showing another embodiment. FIG. 10 is a front view of the bending guide device, FIG. 11 is a perspective view of the bending guide device, and FIG. 12 is an overall plan view of a belt conveyor device (third embodiment) showing another embodiment. 13 is an overall perspective view of a belt conveyor device (fourth embodiment) showing another embodiment, and FIG. 14 is a view taken along BB of FIG. Vertical sectional view, FIG. 1
5 is a longitudinal sectional view taken along line CC of FIG. 12, FIG. 16 is a sectional perspective view of a curved portion (curved portion) of the horizontal pipe, and FIG. 17 is a graph showing the correlation between dew condensation and the temperature difference between inside and outside and humidity. .

The belt conveyor device 100 of the present invention has a structure in which an air-floating belt conveyor 200 and a reversing device 50 are connected at required places, as shown in FIGS. Air levitated belt conveyor 20
For 0, an arbitrary number of necessary curved portions are provided to bend and curved, thereby transporting the transported object while bending the transport line. As will be described later, the trough forming device 60 and the bending guide device 80 are arranged at necessary places so that the transported object can be efficiently transported without any trouble.

Hereinafter, the details will be described. Figure 1
As shown in FIG. 2, an air-floating belt conveyor 200 in the belt conveyor device 100 is configured such that an endless smooth belt 1 is wound between a head pulley 2 and a tail pulley 3 and can move endlessly. At the intermediate portion between the head pulley 2 and the tail pulley 3, as shown in FIG. 2, a pair of upper and lower belt support troughs (a carrier side belt support trough 10 and a return side belt support trough 1).
2) is formed by a cylindrical pipe made of a steel pipe or a horizontal pipe made of an elliptic pipe made of a steel pipe. That is, the horizontal pipe of the present invention is either a steel pipe cylindrical pipe, a steel pipe elliptical pipe, or a combination thereof.

If the elliptical tube is too flat in the horizontal or vertical direction, it may hinder the transportation of the goods at the bend,
Since there is a possibility that structural defects such as crushing or cracking may occur in the pipe during bending at the time of forming a curved portion, the flatness, that is, the ratio of the major axis to the minor axis of the ellipse (with respect to the minor axis) is as follows. Restrictions on the ratio of major axis). Flatness (ratio of major and minor diameters) In the case of a steel pipe elliptic pipe, the ratio of the long and short sides of the steel pipe elliptic pipe is 1.5.
The following is assumed. Curvature radius R The diameter of the steel pipe is 35 times or more the pipe diameter, and the diameter of the elliptic steel pipe is 25 m or more the average diameter of the pipe.

Each of the upper horizontal pipe P and the lower horizontal pipe Q is a steel pipe cylindrical pipe, a steel pipe elliptical pipe, or a combination thereof. However, if necessary, a steel pipe can be used instead of a resin pipe. Carrier side belt 1a
A carrier-side belt support trough (hereinafter, referred to as a carrier-side trough) 10 that supports the return-side belt 1b and a return-side belt support trough (hereinafter, referred to as a return-side trough) 12 that supports the return-side belt 1b.
Corresponds to the lower inner surface of the lower horizontal pipe Q.

The upper horizontal pipe P and the lower horizontal pipe Q are connected by an air duct 22 disposed along the belt running direction, and are formed at the lowermost portion of the upper horizontal pipe P at substantially equal intervals in the belt running direction. Compressed air supplied via the air supply pipe 20 and the air duct 22 through the provided inlet 22a enters the upper horizontal pipe P, and floats the carrier-side belt 1a. The air after the floating action is discharged from the exhaust pipe 24. In the same manner as described above, the lower horizontal pipe Q is also provided with an air duct 32 below in the belt running direction, and the air supply pipe 30, the air duct 30, and the inlet 32a.
Compressed air is supplied to the lower horizontal pipe Q through the lower side to move the return side belt 1b while floating. The air after the levitation action is exhausted by an exhaust pipe 34 provided on the oblique side
Is discharged from

In the present invention, as shown in FIG. 2, a hot air generator 300 and a hot air controller 310 are provided at required locations of the horizontal pipes P and Q via hot air pipes 320. Temperature sensors Ti, To and humidity sensors Mi, Mo are installed inside and outside the horizontal pipes at arbitrary one or more locations in the longitudinal direction of the horizontal pipes P, Q, respectively. Sensor Mi,
The measured values measured by Mo are converted to electrical signals,
It is transmitted to the hot air control device 310 of the hot air generation device 300 every moment. The hot air control device 310 inputs the temperature information and the humidity information to calculate the inside / outside temperature difference ΔT, and the dew condensation inside the horizontal pipes P and Q set by a program previously input to the hot air control device 310. When a set condition for preventing the generation is satisfied, an operation command is issued to the hot air generator 300 to supply a required amount of hot air to the inside of the horizontal tube. The hot air pipe 310 may be provided separately from the compressed air supply air supply pipes 20 and 30 for floating the belt, or may be connected to the air supply pipes 20 and 30 and mixed with the compressed air to be supplied. The relationship between the dew condensation, the humidity, and the temperature difference between the inside and outside occurs, for example, in an area above the curve of the graph shown in FIG. 17, so that the program is designed so as to supply hot air when these boundaries are exceeded. .

Also, on the inner surface or outer surface of the horizontal pipes P and Q,
By applying hot-dip galvanizing, hot-dip aluminum plating, or diffusion chrome plating, corrosion damage may be avoided even if dew condensation occurs and a sulfuric acid component or other acid is generated. "Hot dipping" is a technique in which a material is immersed in molten metal and then pulled up to solidify and coat the molten metal on the material surface.
Sn and Pb may be used in addition to n and Al. The feature of hot-dip plating is that a thick coating is possible, and the adhesion and deformation workability depend on the properties of the alloy layer formed between the coating material and the material (horizontal pipe). Of the hot-dip galvanizing, the most widely used is hot-dip galvanizing for steel materials, which is carried out at a bath temperature of about 450 ° C., and contains aluminum in an amount of 0.1 to suppress the development of an alloy layer. 1-0.2% is added. The excellent corrosion resistance of galvanized steel is due to the excellent corrosion resistance of zinc itself and the cathodic protection of zinc.
"Hot dipped aluminum plating" is divided into heat resistance and corrosion resistance. The former is an Al-Si alloy bath containing 5 to 10% of Si, and the latter is a pure aluminum bath. In addition, diffusion plating of chromium, aluminum, silicon, or the like may be performed for corrosion resistance. In "diffusion chromium plating", which is one type of "diffusion plating", for example, metal chromium powder, ammonium chloride as an activator, and alumina powder as a sintering inhibitor are mixed, and a material is embedded therein. Heated in an inert gas or reducing gas, the chromium metal powder evaporates as chromium chloride and decomposes on the material surface to deposit metal chromium, which diffuses into the material. It penetrates to form an alloy layer.

At one end of the upper horizontal pipe P on the side of the tail pulley, an inlet 4 for the goods M is provided, and end covers 7 and 8 for covering the tail pulley 3 and the head pulley 2 are provided, respectively. A chute 9 for discharging the transported material M is connected to a lower portion of the chute 8. As shown in FIG. 2, a plurality of column bases 40 are fixed to the lower horizontal pipe Q in the belt running direction.
An inspection corridor 44, a stand 46, a handrail 48 and the like are provided via the support 42.

Between the head pulley 2 and the lower horizontal tube Q, and between the tail pulley 3 and the lower horizontal tube Q, belt reversing devices 50 are provided. The belt reversing device 50
As shown in FIGS. 3 to 5, a horizontal scissor roller 52 is provided on one pulley side, and a cylindrical support roller 52a is provided on the other lower horizontal tube side.
A rounding roller 5 is provided at an intermediate portion between the
4 (FIG. 3), a cylindrical holding roller 59 (FIG. 4), or an inclined roller 58 (FIG. 5). That is, the horizontal scissoring roller 52 horizontally sandwiches a flat belt from above and below, and the cylindrical supporting roller 52a has a plurality of rollers arranged in a semicircular shape, and the cross section of the roller leaving the lower horizontal pipe Q is half. Circular bent return belt 1b
Is maintained as it is, or the return belt 1b is formed into a semicircular shape immediately before entering the lower horizontal pipe Q.

On the other hand, the rounding roller 54 is a roller for rounding the return belt 1b into a cylindrical shape.
) Rollers are arranged in the same cross section in a polygonal shape. Further, as shown in FIG. 7, the cylindrical holding roller 59 is
Vertical press roller 59a and bent return belt 1b
And a pair of upper and lower inclined inner pressing rollers 59b, 59b that support both ends from the inside. Furthermore, as shown in FIGS. 5 and 6, the inclined roller 58
6 (generally, a pipe is used), it is configured to protrude at a plurality of locations separated by a predetermined distance in the axial direction while sequentially changing the projection angle, and to abut and roll on the back surface of the belt. The belt reversing devices 50 (shown in FIG. 3), 50A (shown in FIG. 4), and 50B (shown in FIG. 5) configured as described above are all from the left side to the right side of the drawing or the right side of the drawing. When the return belt 1b passes from the left to the right, the front and back surfaces of the return belt 1b are turned upside down.

On the other hand, the belt conveyor device 10 shown in FIG.
0A is the second embodiment of the present invention (corresponding to the third invention)
And the belt conveyor device 100 of FIG.
The difference from the embodiment is that a trough forming device 60 is disposed between the belt reversing device 50 and the lower horizontal pipe Q. As shown in FIGS. 8 and 9, the trough forming device 60 is a flat belt 1 that has passed through the belt reversing device 50.
(Actually, the return side belt 1b) is curved into a U-shaped cross section and smoothly introduced into the lower horizontal pipe Q. In order to prevent the return side belt 1b near the entrance of Q from being flat and the belt end portion being strongly rubbed against the inner wall surface of the lower horizontal pipe and being worn, the belt section is installed for the purpose of holding the belt cross section in a U-shape. is there. Specifically, a pair of upper and lower pressing rollers 61 and 62 at the center of the belt cross section and a pair of upper and lower scissoring rollers 63 that sandwich the belt end obliquely,
63, 64 and 64.

The inlet and outlet of the upper horizontal pipe P and the lower horizontal pipe Q are provided with bending guide devices 8 shown in FIGS.
0 is provided (the examples of FIGS. 1 and 8 show examples in which only the entrance of the upper horizontal pipe P is provided). Bending guide device 80
In order to prevent a wear phenomenon in which the belt end of the carrier-side belt 1a having a flat cross-section passing through the tail pulley 3 slides on the inner wall of the upper horizontal pipe entrance, the cross-section of the belt 1a is bent in advance into a U-shape. A plurality of pressing rollers 81, 82, 83, 84 and 85 for pressing the carrier side belt 1a from the outside are arranged in the same cross section. At the entrance and exit of the lower horizontal pipe Q, the return side belt 1b that has passed through the belt reversing device 50 tends to move inward.
In addition, on the opposite side of the pressing roller 81 and the pressing roller 85, an inner pressing roller 81a and an inner pressing roller 85a sandwiching the edge of the return side belt 1b from the inside are arranged. Reference numeral 86 denotes a support for the inner pressing roller 81a and the inner pressing roller 85a. FIG. 11 shows an example in which the bending guide device 80 is arranged at the outlet of the lower horizontal pipe Q. As described above, it is desirable to dispose the bending guide devices 80 at all four points at the outlet of the upper horizontal pipe P and at the inlet and outlet of the lower horizontal pipe Q in order to prevent the same wear phenomenon from occurring.

On the other hand, FIGS. 12 and 13 show an embodiment in which a curved portion is provided in the air-floating type conveyor 200.
FIG. 12 is an example (third embodiment) of a belt conveyor device 100B provided with planar curved portions, and FIG. 13 is an example (fourth embodiment) of a belt conveyor device 100C provided with vertical curved portions. 12 and 13 show a state in which a steel pipe cylindrical pipe or a resin pipe cylindrical pipe is curved in a curved portion (curved portion) in the horizontal or vertical direction within the above-described limited curvature range (the radius of curvature R is set to the above-described value). Above the limit).
In each case, the cylindrical tube has changed to an elliptical shape due to the influence of the curvature. In the curved portions shown in FIGS. 12 and 13, as shown in FIG. 16, the pitches of the compressed air injection ports 22a and 32a in the belt running direction are reduced on both the carrier side and the return side so that compressed air is densely distributed in the horizontal pipe. Care should be taken to inject into the P and Q, and in the case of a horizontal curve (corresponding to FIG. 12), the belt on the convex side of the curved portion goes down, and conversely, the belt on the concave side (the side with the center of curvature). Since the belt tends to rise, the inlets 22a and 32a are also desirably provided at positions deviated from the lowermost points of the horizontal pipes P and Q to the concave side. The amount of eccentricity is larger on the return side than on the carrier side.

The belt conveyor device 100 (first embodiment) shown in FIGS. 1 to 7 and the belt conveyor device 100A (second embodiment) shown in FIG.
2 belt conveyor device 100B (third embodiment) and FIG.
The operation of the third belt conveyor device 100C (fourth embodiment) will be described.

The transported material M is supplied from the inlet 4 on the tail pulley side onto the carrier belt 1a on the carrier trough 10, and is transported by a belt driving device (not shown) and the carrier belt 1a driven by the head pulley 2. Is discharged from the chute 9 on the head pulley side. During operation of the belt conveyor device 100 or the belt conveyor devices 100A, 100B, 100C, the carrier-side belt 1a and the return-side belt 1b are compressed between the carrier-side trough 10 and the return-side trough 12, respectively. It moves while slightly rising due to the film layer due to air, and the abrasion with the troughs 10 and 12 is greatly reduced as compared with the conventional model, and power consumption is reduced.

FIG. 2, FIG. 14, and FIG. 15 show cross sections on the head pulley side and the tail pulley side, respectively.
In addition, the belt conveyor device 100B of FIGS.
In 100C, the carrier-side belt 1a travels while floating above the lower inner surface of the upper horizontal pipe P, and the belt traveling direction is curved horizontally or vertically.

On the other hand, the belt 1 inverted by the head pulley 2, that is, the return side belt 1b, enters the belt inverting device 50, and the upper and lower surfaces are replaced with the top and bottom as described above.
Due to the floating action of the compressed air introduced into and injected into the lower horizontal pipe Q of FIG. Then, after passing through the lower horizontal pipe Q, the belt is turned upside down again by the belt reversing device 50 and returned to the original state, the tail pulley 3 is reversed, and the return side belt 1b becomes the carrier side belt 1a and reaches the input port 4. .

In the belt conveyor device 100A, during the above operation, after the belt is inverted by the belt inverting device 50 after the head pulley 2, the belt 1b passes through the trough forming device 60 and enters the lower horizontal tube Q beforehand. It is formed into a U-shaped cross section to facilitate the introduction into the lower horizontal pipe Q, and as described above, the belt cross section when exiting the lower horizontal pipe Q is formed as U-shaped.
It is held in the shape of a letter to prevent harmful friction between the inner surface of the lower cylindrical tube Q and the end of the belt.

The belt conveyor devices 100, 100A, 1
In 00B and 100C, the reason that the return side belt 1b entering the lower horizontal tube Q is inverted by the belt reversing device 50 is that the carrier M is loaded while the carrier side belt 1a is held in the U-shaped cross section by the upper horizontal tube P. When the return side belt 1b passes through the lower horizontal pipe Q as it is, the return side belt 1b is not flat but rather an inverted U-shaped cross section (curved shape).
This is to prevent the belt end from sliding on the inner side wall of the lower horizontal pipe Q to promote frictional wear.

Further, the belt conveyor device 100 of the present invention
2 to 14C, as shown in FIGS. 2, 14 and 15, a pair of upper and lower carrier-side belt support troughs 10 (upper horizontal pipe P) and a return-side belt support trough 12 (lower horizontal pipe) connected by an air duct 22. Since the pipe Q) is the main structure and is only supported on the ground by column bases 40 intermittently arranged in the belt running direction, a large number of pipes Q) are provided in the belt running direction as in the conventional belt conveyor device. A frame (also called a conveyor frame) for supporting the arranged carrier rollers becomes unnecessary, and the equipment cost is greatly reduced. That is, since the pair of upper and lower horizontal pipes P and Q themselves are relatively lightweight, they have rigidity and also function as cross beams, so that the gantry as a cross beam of the conventional belt conveyor device is used. May be omitted. Therefore, in the case of a long distance span or an inclined conveyor, the effect of omitting the gantry becomes remarkable. Further, in addition to the above-described case where the belt is used for a long-span belt conveyor device, a strength member (structure) having a large rigidity such as a long-span portion of cargo handling equipment such as a stacker, a reclaimer, an unloader, and a ship loader. When a member is required, it is convenient to adopt the belt conveyor device of the present invention instead of the flat belt type belt conveyor.

[0033]

The belt conveyor apparatus of the present invention described above employs a long-span air-floating belt conveyor, and can be curved by arranging a curved position at an arbitrary position as required. Thus, a large amount of high-speed transfer over long distances is possible. In addition, the air-floating type belt conveyor has a closed structure, so there is no noise or contamination of the work environment due to dropping, and there is no loss due to dropping of transported goods. As well as improving the running cost, the running cost due to the reduction in power consumption and the initial cost due to the omission of the gantry can be greatly reduced. Furthermore, in the present invention, the lower inner surface is used as a support trough for the carrier-side belt or the return-side belt by skillfully utilizing a horizontal cylindrical tube or an elliptic tube, and a belt reversing device or a trough forming device is provided on the return side. Since the wear of the belt is significantly reduced, the maintainability is improved, and the operation can be performed safely and stably for a long period of time. In addition, since the bending guide device is provided at the entrance and / or exit of the horizontal pipe, it is possible to prevent the belt end from sliding on the inner wall of the cylindrical pipe, prevent belt deterioration due to abrasion, and prolong the service life. Can be. Temperature sensors and humidity sensors are installed inside and outside the horizontal pipe to measure the temperature difference between inside and outside and inside and outside humidity, and to supply hot air to the inside of the horizontal pipe as necessary so as to prevent dew condensation. Since the outer surface is plated with molten metal, corrosion damage due to sulfuric acid components and the like can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall side view of a belt conveyor device according to a first embodiment of the present invention.

FIG. 2 is a transverse sectional view taken along line AA of FIG.

FIG. 3 is a schematic side view of the belt reversing device according to the embodiment of the present invention.

FIG. 4 is a schematic perspective view of a belt reversing device according to an embodiment of the present invention.

FIG. 5 is a schematic perspective view of a belt reversing device according to another embodiment of the present invention.

FIG. 6 is a sectional view of a main part of an inclined roller portion of the belt reversing device of FIG. 5;

FIG. 7 is a schematic perspective view of a belt reversing device according to another embodiment of the present invention.

FIG. 8 is an overall side view of a belt conveyor device according to another embodiment (second embodiment) of the present invention.

FIG. 9 is a longitudinal sectional view of a trough forming apparatus according to an embodiment of the present invention.

FIG. 10 is a front view (longitudinal sectional view) of the bending guide device according to the embodiment of the present invention.

FIG. 11 is a perspective view of a bending guide device according to an embodiment of the present invention.

FIG. 12 is an overall plan view of a belt conveyor device according to another embodiment (third embodiment) of the present invention.

FIG. 13 is an overall perspective view of a belt conveyor device according to another embodiment (fourth embodiment) of the present invention.

FIG. 14 is a transverse sectional view taken along line BB of FIG. 12;

FIG. 15 is a transverse sectional view taken along the line CC of FIG. 13;

FIG. 16 is a sectional perspective view of a curved portion (curved portion) of the horizontal pipe of the belt conveyor device of the present invention.

FIG. 17 is a graph showing a correlation between dew condensation, an inside / outside temperature difference, and humidity according to the present invention.

[Explanation of symbols]

Reference Signs List 1 belt 1a carrier side belt 1b return side belt 2 head pulley 3 tail pulley 4 slot 7 end cover 8 end cover 9 chute 10 carrier side belt support trough (carrier side trough) 12 return side belt support trough (return side trough) 20 supply Trachea 22 Air duct 22a Inlet 24 Exhaust pipe 30 Intake pipe 32 Air duct 32a Inlet 34 Exhaust pipe 40 Pillar 42 Support 44 Inspection corridor 46 Stand 48 Handrail 50, 50A, 50B Belt reversing device 52 Horizontal scissors roller 52a Cylindrical support roller 54 rounding roller 56 support 58 inclined roller 59 cylindrical holding roller 59a vertical pressing roller 59a inner pressing roller 60 trough forming device 61, 62 pressing roller 63, 64 scissors roller 80 bending guide device 81 82, 83, 84, 85 Holding roller 81a, 85a Inner holding roller 86 Support 100 Belt conveyor device (first embodiment) 100A Belt conveyor device (second embodiment) 100B Belt conveyor device (third embodiment) 100C Belt conveyor Apparatus (fourth embodiment) 200 Air levitated belt conveyor M Transported material P Upper horizontal pipe Q Lower horizontal pipe R Radius of curvature Mi, Mo Humidity sensor Ti, To Temperature sensor ΔM Internal / external humidity difference ΔM Internal / external temperature difference

Claims (6)

[Claims] 1. An air-floating belt conveyor having an endless belt and a belt-supporting trough having a plurality of compressed air injection holes for floating the belt on both a carrier side and a return side of the belt in a belt running direction. A belt on the return side immediately after being inverted by the drive pulley at the edge of the belt conveyor device and a return side belt immediately before being inverted by the tail pulley on the edge of the belt conveyor device. A belt reversing device for reversing the upper and lower surfaces is provided. Each of the belt support troughs is formed of a horizontal tube formed of a pair of upper and lower steel tubes or a cylindrical tube or an elliptical tube. The lower belt is supported on the lower inner surface of the upper horizontal pipe of the pair of pipes, and the return belt is located below the lower horizontal pipe of the pair of horizontal pipes. A compression member supported on the inner surface and extending along a belt running direction that communicates with a pressure air source and supplies compressed air to the injection hole at a lower portion of the injection hole formed at the bottom of each of the horizontal pipes. An air pipe is connected, an exhaust port for discharging the compressed air after the belt levitation action is provided in the horizontal pipe, a hot air generator and a hot air pipe for supplying hot air into the pair of upper and lower horizontal pipes are provided, A temperature sensor and a humidity sensor are respectively provided inside and outside of a pair of upper and lower horizontal tubes at an arbitrary position, and the temperature and humidity signals detected by the temperature sensor and the humidity sensor are received every time, and the temperature difference between the inside and outside and the inside and outside are detected. Calculates the humidity difference and sends an operation command to supply hot air into the horizontal pipe to the hot air generator when the temperature difference or the humidity difference falls within a preset range. A belt conveyor device, characterized in that the pair of upper and lower horizontal pipes has a curved portion curved at the same curvature in the left-right direction or the up-down direction at any position in the longitudinal direction. 2. In the case where an elliptical pipe is adopted as a pair of upper and lower horizontal pipes, the length ratio of the long and short sides of the steel pipe elliptical pipe is 1.5 or less, and the bending of the pair of upper and lower horizontal pipes is performed. The belt conveyor device according to claim 1, wherein the radius of curvature at the location is at least 35 times the pipe diameter in the case of a steel pipe cylindrical pipe, and at least 25m times the average pipe diameter of a steel pipe elliptic pipe. 3. A belt in which a plurality of rollers for bending a belt cross section into a U-shape are arranged in the same cross section at at least one of the entrance and the exit of the upper horizontal pipe and the lower horizontal pipe. 3. The belt conveyor device according to claim 1, further comprising a bending guide device having a cross section. 4. A belt reversing device comprising: a horizontal scissor roller provided on a pulley side; a cylindrical support roller provided on a lower cylindrical tube side; and a cylinder having the same cross section provided at an intermediate portion between the two rollers. A plurality of rounding rollers arranged in a circle, or a rounding roller composed of a pair of vertical pressing rollers and a pair of upper and lower inclined inner pressing rollers that support both ends of a bent belt from the inside, respectively, 4. The belt conveyor device according to claim 1, wherein the belt conveyor device is formed by an inclined roller which projects at a plurality of locations separated by a predetermined distance in the axial direction from the support, and which protrudes while abutting and rolling on the back surface of the belt. . 5. Between the belt reversing device and the lower horizontal tube,
The return belt is composed of a pair of upper and lower pressing rollers that roll by contacting the upper and lower surfaces of the cross-section central part and a pair of upper and lower scissors rollers that roll while holding both ends of the return belt at an angle. The belt conveyor device according to claim 1, further comprising a trough forming device that forms the troughs in a bowl shape. 6. The belt conveyor device according to claim 1, wherein the inner surface or the outer surface of the horizontal tube is subjected to hot-dip galvanizing, hot-dip aluminum plating or diffusion chrome plating.