JPH1059516A - Loading table for air levitation type belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loading table for air levitation type belt conveyor which can ensure the floating amount of a conveyor belt even at a position for inputting an object to be carried and suppress leakage of air for levitating the conveyor belt by minimizing the distance from the conveyor trough of the conveyor belt at the inputting position or in the vicinity thereof. SOLUTION: A loading table 5, which is provided with both the arc-shaped upper and lower surfaces 5a, 5b which meet the inner wall of an inner pipe (conveyor trough) 1b in an air levitation type belt conveyor 1, and an air chamber 5c formed between both the upper and lower surfaces 5a, 5b, is inserted between the inner pipe 1b and a conveyor belt 4 so as to move freely. An intake hole 5d is formed in the inner wall material of the loading table 5, the loading table 5 is supported by means of lowering from a delivery machine, and one end of an air supply pipe 7a formed extending from the delivery machine side is connected with the air chamber 5c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a downwardly projecting arcuate outer tube and a downwardly projecting arcuate inner tube disposed in the outer tube. The present invention relates to an air levitation type belt conveyor device in which air is blown into the lower surface of a flexible conveyor belt having a curved shape along the surface thereof to cause the belt to travel while floating, and more specifically, a reclaimer / unloader at an arbitrary position of the conveyor belt on an inner tube. The present invention relates to a loading table used when a conveyed object (load) such as a granular material is charged from a dispenser capable of traveling.

[0002]

2. Description of the Related Art An air levitation type belt conveyor device having the above-mentioned structure is known, for example, as described in Japanese Patent Publication No. 7-64405.
2. Description of the Related Art There is a belt conveyor device capable of arbitrarily changing the input position when a conveyed object such as a granular material is input from a dispenser such as a reclaimer or an unloader. A yard conveyor device used in combination with a reclaimer and the like and a berth conveyor device used in combination with an unloader and the like belong to them.

By the way, in the case of these belt conveyor devices, when an object to be conveyed is thrown onto the conveyor belt from the dispenser, the weight of the object to be conveyed and the gravitational force at the time of falling act on the conveyor belt. Air ejection pressure (supply pressure) during normal transport to lift the conveyor belt
Then, the conveyor belt cannot be kept floating.

Therefore, conventionally, a roller type loading table has been generally used. As shown in FIG. 7, the loading table 51 is suspended from a dispenser such as a reclaimer or the like so as to contact the lower surface of the conveyor belt 4 on the inner wall of the inner tube (also referred to as a carrier-side conveyor trough) 1b. You. A plurality of rows of horizontal rollers 52 and inclined rollers 53 on both sides inclined upward with the center as the center are provided along the front-rear direction of the conveyor belt 4, and the three rollers 52 and 53 are arranged in a plurality of rows as the dispenser moves. Is configured to move while rotating. The conveyor belt 4 is supported in a dish shape by a plurality of rows of three rollers 52 and 53, and runs while being separated from the carrier side conveyor trough 1b. With this configuration, the transported object A thrown from the dispenser through the chute 54 onto the conveyor belt 4 is
It is supported by rollers 52 and 53.

FIG. 8 is a side view showing a dispensing machine 61 provided with a loading table 51 having the above-mentioned structure. The dispensing machine 61 can run on tracks 62 laid on both sides of the air-floating belt conveyor device 1. Wheels 65 are mounted on the lower end of a gate-shaped frame 63 that is placed and straddles the belt conveyor device 1. A loading table 51 is suspended by a support frame 64 below a central portion in the frame 63, and the conveyor belt 4 on the carrier side is arranged to run on the rollers 52 and 53 at the upper end of the loading table 51.

[0006]

However, the above-mentioned conventional loading table has the following disadvantages.

That is, since the loading table moves in accordance with the running of the dispensing machine, the distance at which the conveyor belt separates from the conveyor trough also changes, and when the transport amount of the object changes, the conveyor belt moves from the conveyor trough. It is difficult to seal the air supply holes in the conveyor trough because of the change in separation distance. As a result,
A large amount of air for levitation leaks from the vicinity of the loading table, and the air pressure is greatly reduced, so that the levitation state of the conveyor belt cannot be sufficiently maintained, the traveling speed of the conveyor belt decreases, and the transport efficiency may be deteriorated. There is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a sufficient floating amount of a conveyor belt can be ensured even at a loading position of a conveyed object. It is an object of the present invention to provide a loading table of an air levitation type belt conveyor device which can minimize the separation distance and suppress the leakage of air for floating the conveyor belt.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, a loading table of an air-floating belt conveyor device according to the present invention comprises a downwardly convex arc-shaped outer tube (return side conveyor trough) and A downwardly projecting arc-shaped inner tube (carrier-side conveyor trough) disposed in the outer tube, and air is blown on the lower surface of the curved flexible conveyor belt along the inner wall of the inner and outer tubes (conveyor trough). In the air-floating belt conveyor device that blows air to float and travels, a conveyed object such as powder or granules is loaded from a movable dispenser such as a reclaimer / unloader into an arbitrary position of the conveyor belt on the inner pipe. A loading table used in the loading operation, wherein an arc-shaped inner / outer surface (upper / lower surface) corresponding to the inner wall of the inner tube and an empty space formed between the inner / outer surface (up / down surface). A loading table having a chamber is inserted between the inner wall of the inner tube (conveyor trough) and the conveyor belt so as to be movable in the front-rear direction, and an air supply hole is provided on the inner surface (upper surface) of the loading table. The loading table is suspended from the dispenser and supported, and one end of an air supply pipe extending from the dispenser is connected to the air chamber.

According to the loading table having the above-described configuration, the loading table moves with the clearance between the lower surface of the loading table and the conveyor trough kept to a minimum as the dispensing machine travels. Leakage of air blown toward the lower surface can be considerably reduced as compared with a conventional roller-type loading table. On the other hand, with respect to the conveyor belt on the loading table, regardless of the pressure and the amount of air blown out from the conveyor trough, the air can be blown out by determining the injection pressure and the air amount of the air. By adjusting the pressure and amount of air according to the weight per unit of the conveyed object dropped from the dispenser and thrown in, the conveyor belt can stably float constantly.

According to a second aspect of the present invention, a wear-resistant seal plate capable of closing an air supply hole provided in the inner pipe is provided.
It is desirable that the loading table is mounted on the outer surface (lower surface).

With this configuration, the seal plate closes the air supply hole of the carrier-side conveyor trough below the loading table, thereby preventing air from being blown out. The seal plate also has a spacer-like function of maintaining a constant gap between the conveyor trough and the lower surface of the loading table.

According to a third aspect of the present invention, it is preferable that the air chamber of the loading table is supplied with pressurized air having an air pressure higher than an air pressure blown from the belt conveyor device to the conveyor belt.

According to this configuration, high-pressure air is jetted onto the conveyor belt on the loading table, so that the conveyor belt is kept in a floating state even if the conveyed object is dropped from a dispenser such as a reclaimer and thrown in. It is.

Preferably, both front and rear ends of the loading table are formed in a streamline shape.

With this configuration, even if the loading table is moved between the conveyor belt and the conveyor trough, the sliding resistance is small, and the conveyor belt does not largely separate from the conveyor trough, and the loading table moves smoothly. .

According to a fifth aspect of the present invention, a flange frame is erected along both upper end edges of the outer tube, and a strip-shaped seal belt is detachably mounted on an upper flange of the flange frame. The seal belt is configured to be detached from above the upper flange as the dispenser moves, and seal members can be attached to both sides of the dispenser so as to be able to contact the upper flange.

With this configuration, rainwater and the like are prevented from entering through the upper end opening of the air-floating belt conveyor device, and air supplied to the lower surface of the conveyor belt is prevented from leaking to the outside. In addition, the amount and pressure of air supplied for floating the conveyor belt can be minimized, and the floating state of the conveyor belt can be maintained almost reliably. On the other hand, when the dispensing machine is moved, the seal belt is detached from the upper flange and does not hinder the movement of the dispensing machine, so that the dispensing machine can be smoothly moved without any trouble. Further, at the position where the seal belt separates with the movement of the dispensing machine, the seal members provided on both sides of the dispensing machine come into contact with the upper flange, thereby preventing rainwater and the like from entering and also preventing air from leaking.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a loading table of an air-floating belt conveyor device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment applied to an air-floating belt conveyor device (berth conveyor) installed on a quay (berth). In FIG. 1, berth B
Above, two air-floating belt conveyor devices 1 and 1 are installed in parallel via a support member 2 at predetermined intervals. A cable rack 18 and a grating (grid frame) 19 are installed in parallel between the belt conveyor devices 1 along the longitudinal direction. An air supply pipe 20 is provided along the belt conveyor device 1 near the lower inside of each support member 2.

The belt conveyor device 1 has a known structure. As shown in FIGS. 2 (a) and 2 (b), a downwardly convex arc-shaped outer tube (return-side conveyor trough) 1a includes an outer tube 1a. An inner tube (carrier-side conveyor trough) 1b having a smaller inner diameter than that of the inner tube and having a downwardly convex shape is provided. The air supply ducts 1c are arranged so as to cover the air supply holes 1f. An air supply pipe 1e from a blower 1d is connected to each air supply duct 1c of the outer pipe 1a and the inner pipe 1b. Endless flexible conveyor belt 4 of curved shape along the inner walls of outer tube 1a and inner tube 1b
2a is continuously wound around the right driving pulley 4a and the left driven pulley 4b in FIG. 2A, and floats on the lower surface of the conveyor belt 4 by air blown from an air supply hole to travel.

FIG. 3 is an enlarged view of a part (carrier side) of FIG. 1, and is a sectional view taken along the line III-III of FIG. 4, and FIG.
FIG. 2 is a sectional view taken along line II-II. As shown in these figures, an arc-shaped loading table 5 corresponding to the inner wall of the conveyor trough 1b is arranged in a conveyor trough (inner tube) 1b on the carrier side. Loading table 5
An outer surface (lower surface) 5a whose cross section in the width direction is an arc as shown in FIG.
An inner surface (upper surface) 5b having the same cross section as an arc and an air chamber 5c formed between the inner and outer surfaces (upper and lower surfaces) 5a and 5b are provided. The loading table 5 is used for the dispensing machine 2
1 (see FIG. 6) is supported by being suspended via a support frame 3, and a constant gap is always maintained between the lower surface 5a and the carrier-side conveyor trough 1b.

As shown in FIG. 4, both ends of the loading table 5 are formed in a so-called streamline, which is formed by a smooth curve, and is inserted between the carrier-side conveyor trough 1b and the conveyor belt 5. The loading table 5 can be smoothly moved in any of the front and rear directions. Further, a predetermined width (the air supply hole 1 of the carrier side conveyor trough 1b) is provided at the center of the lower surface of the loading table 5.
f) (sufficient width to cover f). The seal plate 6 is made of a material having low sliding resistance and high abrasion resistance, for example, a high-molecular synthetic resin (high-molecular-weight polypropylene, high-molecular-weight polyethylene, etc.).

At the front and rear portions of the air chamber 5c of the loading table 5, the other end of an air supply pipe 7a having one end connected to a blower 7 mounted on a dispenser 21 (see FIG. 6) is branched. One ends of the tubes 7b and 7c are connected. At the center of the arc-shaped upper surface 5b, air supply holes 5d are formed at a predetermined pitch in the longitudinal direction. By setting the pressure of the air supplied from the blower 7 to the air chamber 5c higher than the pressure of the air supplied from the blower 1d to each of the air supply ducts 1c, a chute 8 is provided from a dispenser (not shown).
Thus, even if a powder (particles) A such as pulverized coal or cement falls onto the conveyor belt 4 on the carrier side, the floating state of the conveyor belt 4 can be stably maintained.

In the present embodiment, in order to prevent the transferred object A conveyed by the belt conveyor device 1 from being exposed to wind and rain and to make it difficult for the air supplied into the belt conveyor device 1 to escape to the outside, We are elaborating such ideas. That is, as shown in the conveyor device 1 on the right side of FIG. 1, an inward flange frame 9 having an L-shaped cross section is erected along both upper end edges of the outer pipe 1 a, and the upper flange 9 a of the flange frame 9 is formed.
A band-shaped seal belt 10 is detachably mounted on the upper part. The seal belt 10 is provided over the entire length of the outer pipe 1a except for the position of the dispenser 21 (FIG. 6). At the position of the dispensing machine (not shown), the seal belt 10 is moved upward so as to avoid the chute 8, and instead, as shown in the conveyor device 1 on the left side of FIG. The inner portions of the seal rubber (seal member) 11 are bonded to each other, and the outer portion of the seal rubber 11 is moved together with the dispensing machine (not shown) while being in contact with the upper flange 9 a of the flange frame 9. Seal belt 1
As shown in FIG. 6, which will be described later, a guide roller 23 rotatably mounted on the front and rear lower portions of a frame 22 of the dispenser 21 and support legs 24 erected on front and rear portions of the upper surface of the frame 22 are avoided. The operation is performed by guiding the seal belt 10 above the dispensing machine 21 along a guide roller 25 rotatably supported at the upper end.

The air-floating belt conveyor device 1 having the loading table 5 of the present embodiment is constructed as described above. The loading table 5 operates as follows. In FIG. 1, a chute 8 is placed on a carrier-side conveyor belt 4 of a belt conveyor device 1 on a berth B by a dispenser (not shown) such as an unloader from a coal carrier (not shown).
An object (load) A such as coal is fed from the container. In this state, the loading table 5 is located on the lower surface side of the conveyor belt 4 below the chute 8, and the pressurized air supplied into the air chamber 5 c is simultaneously blown out from the air supply holes 5 d, and the conveyor belt 4 is moved to the loading table 5. 5 It keeps floating from above and runs around.

Since the unloader or the like changes the unloading position according to the unloading state of the load of the coal carrier or the like, the load input position on the carrier-side conveyor belt 4 also moves. The loading table 5 moves between the carrier-side conveyor trough 1b and the conveyor belt 4 with movement of an unloader or the like, but moves smoothly as both ends form streamlines as shown in FIG. When the loading table 5 moves, the upper end opening 1 'is closed by the seal belt 1 similarly to the belt conveyor device 1 on the right side of FIG.
0 seals.

At the position of the loading table 5,
As shown in FIG. 3, the air supply hole 1 of the carrier side conveyor trough 1b.
Since f is closed by the seal plate 6, the air supplied to the carrier-side air supply duct 1c hardly leaks. For this reason, at positions other than the loading table 5, the carrier-side conveyor belt 4 moves the conveyor trough 1b.
, And the load A is smoothly transported. Further, the return side conveyor belt 4 also runs while maintaining a state of floating from the conveyor trough 1a.

FIG. 5 shows a loading table of a belt conveyor device according to another embodiment of the present invention. In this embodiment, a chute 8 from a dispenser such as an unloader is inclined by about 60 ° with respect to a horizontal plane. .

A rectangular frame-shaped auxiliary chute 15 extends from the lower end opening 8 a of the chute 8, and the lower end of the auxiliary chute 15 is connected to the upper end of the flange frame 9. In the auxiliary chute 15, the upper ends of a pair of opposing guide plates 12 are pivotally supported in the width direction by a pivot shaft 13, and the screw rod 14 is rotated by a handle 14 a, whereby the guide plates 12 are rotated. The angle of inclination can be adjusted. In addition, an auxiliary guide plate 16 is disposed to be inclined inward from the lower end opening 8a, and covers the pivot shaft 13. Further, the seal plate 6 is mounted in the longitudinal direction at the center of the lower surface of the loading table 5, and the guide plate 31 is mounted in the longitudinal direction on both sides of the upper end of the lower surface. Other configurations are the same as those of the above-described embodiment, and thus common members are denoted by the same reference numerals, and description thereof will be omitted.

In the belt conveyor device 1 of the present embodiment, a loader (not shown) can be installed at a distance from the belt conveyor device 1 so as to be able to travel, since the load A is fed through the inclined chute 8. it can. The load A falls with a constant force in the width direction of the belt conveyor device 1, but the load A is accurately placed on the conveyor belt 4 on the carrier side by adjusting the inclination angles of the guide plates 12 on both sides. Can be put in. In addition, a necessary gap between the carrier side conveyor trough 1b and the loading table 5 is formed by setting the seal plate 6 at the center at the lower end and the guide plates 31 at both sides at the upper end.
Therefore, the predetermined gap can be reliably maintained.

FIG. 6 shows a dispensing machine provided with the loading table 5 of the first embodiment. The dispensing machine 21 is installed in a pulverized coal storage site (silo). A cover D with a triangular roof structure is installed on silo C,
Dispensing machine 2 straddling this cover D and tunnel E below it
1 is arranged. At the center of tunnel E,
As shown in (b), the belt conveyor device 1 described above is installed in the longitudinal direction. Tracks 26 are laid on both sides of the belt conveyor device 1, and the dispenser 21 is mounted on the track 26 via wheels 27 so as to be able to travel freely.

The frame 22 of the dispensing machine 21 comprises a gate-shaped lower frame 22a straddling the belt conveyor device 1, and an upper frame 22b integrally formed on the lower frame 22a. A pulverized coal discharging blade 28 is rotatably supported at the center of the upper frame 22b. A chute 8 is disposed below the discharging blade 28 toward the carrier-side conveyor belt 4 of the belt conveyor device 1. Has been established. An electric motor 29 and a speed reducer 29a are provided at the center of the upper surface of the upper frame 22b.
Rotate 8. The wheels 27 are pivotally supported at the lower end of the lower frame 22a, and a traveling motor 30 is connected to each wheel 27.

The belt conveyor device 1 as a conveyor device provided with the dispensing machine 21 configured as described above uses the pulverized coal A stored on the silo C to discharge the blades 2 as follows.
The belt 8 is collected in the chute 8 by the rotation of the chute 8, and is moved from the chute 8 to the carrier-side conveyor belt 4
It falls into the upper part. Since the conveyor belt 4 floats by pressurized air blown from the air supply holes 5d of the loading table 5 toward the lower surface thereof, the conveyor belt 4 is maintained in a floating state even when the pulverized coal A is dropped and introduced. For this reason, even if it is thrown on the conveyor belt 4 under the falling force of the pulverized coal A, it comes into contact with the loading table 5 or
The running of the conveyor belt 4 is not hindered.

When the pulverized coal A on the silo C near the stop position of the dispensing machine 21 is dispensed in this way, the wheels 27 are driven to rotate by the electric motor 30 for traveling and the dispensing machine 2 is dispensed.
1 moves along the trajectory 26. With this movement, the loading table 5 moves below the conveyor belt 4. Further, the seal belt 10 covering the upper end opening 1 'of the belt conveyor device 1 is guided above the dispensing machine 21 via the guide rollers 23 and 25 as the dispensing machine 21 moves, so that the running of the dispensing machine 21 is hindered. I can't. On the other hand, at the stop position or the movement position of the dispensing machine 21, the seal belt 10 covering the upper end opening 1 'of the flange frame 9 of the belt conveyor device 1 is detached.
The seal rubber 11 provided on both sides of the flange 1 contacts the flange 9a of the flange frame 9 and covers the upper end opening 1 ', so that rainwater intrusion and air leakage are prevented.

[0036]

As is apparent from the above description,
The loading table of the belt conveyor device according to the present invention has the following excellent effects.

(1) The floating amount of the conveyor belt can be sufficiently ensured even at the position where the conveyed object is loaded, and furthermore, the separation of the conveyor belt from the conveyor trough can be minimized in the vicinity of the conveyor belt. Air leakage can be kept very low.

(2) According to the configuration of the second aspect, the seal plate closes the air supply hole of the conveyor trough below the loading table, thereby preventing unnecessary air blowing, and the seal plate ensures that the conveyor trough and the loading table are securely connected. The gap with the lower surface can be kept constant.

(3) According to the configuration of the third aspect, high-pressure air can be supplied to the conveyor belt on the loading table, so that the conveyed object is dropped from a high position of a dispensing machine such as a reclaimer and thrown in. Even so, the conveyor belt can be kept in a floating state.

(4) According to the structure of the fourth aspect, even if the loading table is moved between the conveyor belt and the conveyor trough, the sliding resistance is small, and the conveyor belt is not largely separated from the conveyor trough. The loading table moves smoothly.

(5) According to the fifth aspect of the present invention, it is possible to prevent rainwater or the like from entering the belt conveyor device, and to prevent the air for floating the conveyor belt from leaking out of the device and supply it. Air volume and pressure can be minimized. On the other hand, even when the dispensing machine is moved, the dispensing machine can be moved smoothly because the seal belt is detached and does not hinder the movement of the dispensing machine. Also, at the position where the dispensing machine moves or stops, the seal rubber provided on both sides of the dispenser comes into contact with the upper flange, so that it is possible to prevent rainwater and the like from entering and also prevent air from leaking.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment in which a loading table of the present invention is applied to an air-floating belt conveyor device (berth conveyor) installed on a quay (berth).

FIG. 2 shows a belt conveyor device 1 having a known structure.
(a) and (b)

FIG. 3 is an enlarged view of a part (carrier side) of FIG. 1, and is a cross-sectional view taken along line III-III of FIG.

FIG. 4 is a sectional view taken along line II-II of FIG.

FIG. 5 is a cross-sectional view illustrating a loading table of a belt conveyor device according to another embodiment of the present invention.

6 (a) is a side view showing a dispensing machine provided with a loading table of the first embodiment, and FIG. 6 (b) is a sectional view taken along line bb of FIG. 6 (a).

7 (a) is an enlarged sectional view taken along the line bb of FIG. 7 (b) showing a conventional roller type loading table, and FIG. 7 (b) is a side view of the same.

FIG. 8 is a side view showing a dispenser provided with a conventional roller-type loading table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt conveyor device 1a Outer tube (return side conveyor trough) 1b Inner tube (carrier side conveyor trough) 1c Air supply duct 4 Conveyor belt 5 Loading table 6 Seal plate 8 Chute 9 Flange frame 10 Seal belt 11 Seal rubber (seal member) 21 Dispenser

Claims (5)

[Claims] 1. An arcuate outer tube having a downward convex shape and an inner tube having a downwardly convex arc shape disposed inside the outer tube, and having a curved flexibility along the inner wall of the inner and outer tubes. In an air-floating belt conveyor device in which air is blown into the lower surface of a conveyer belt to make it float and travel, an arbitrary position of the conveyor belt on the inner pipe may be moved from a movable dispenser such as a reclaimer / unloader. A loading table used when loading an object to be conveyed, such as a loading table, comprising an arc-shaped inner and outer surface corresponding to the inner wall of the inner pipe and an air chamber formed between the inner and outer surfaces. Is inserted between the inner wall of the inner tube and the conveyor belt so as to be movable in the front-rear direction, and an air supply hole is provided on the inner surface of the loading table. While supporting suspended loading table of an air floating belt conveyor device, characterized in that one end of which is connected to the air supply pipe that extends from the dispensing machine side to the air chamber. 2. The loading table of an air-floating belt conveyor device according to claim 1, wherein a wear-resistant seal plate capable of closing an air supply hole provided in the inner pipe is mounted on an outer surface of the loading table. 3. An air-floating belt conveyor according to claim 1, wherein pressurized air having an air pressure higher than an air pressure blown from said belt conveyor device to said conveyor belt is supplied to an air chamber of said loading table. Equipment loading table. 4. The loading table according to claim 1, wherein the front and rear ends of the loading table are formed in a streamline shape. 5. A flange frame is erected along upper edges of both sides of the outer tube, and a strip-shaped seal belt is detachably mounted on an upper flange of the flange frame, and the seal belt is mounted on a dispensing machine. The air levitation belt according to any one of claims 1 to 4, wherein the belt is detached from the upper flange with movement, and seal members are attached to both sides of the dispenser so as to be able to contact the upper flange. Loading table for conveyor equipment.