JP2012136346A - Return path side belt supporting structure of air floating type belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a return path side belt supporting structure of an air floating type belt conveyor reducing travelling resistance of the return path side belt, reducing the capacity of a driving motor, suppressing the wear at a contacting area of the belt, reducing the processes and workload at the site and the cost of processing and installation, and shortening the installation period.SOLUTION: A plurality of air blowout pipes 20 having air blowout openings 18 drilled in the upper surfaces are arranged on a lower surface side of the return path side of the belt 3 in a manner of extending in the moving direction of the belt 3 and at necessary spacings in the direction of the width of the belt 3. An air-supply pipe 15 of an air supply means 17 is connected to the air blowout pipes 20, and air reservoirs 21 are formed in a recessing manner in the upper surfaces of the air blowout pipes 20 where the air blowout openings 18 are formed.

Description

  The present invention relates to a return side belt support structure for an air-floating belt conveyor.

  2. Description of the Related Art In recent years, an air levitation belt conveyor that floats and holds a conveyor belt by an air layer is used as a conveying device that conveys loose objects such as ore and coal.

  For example, as shown in FIGS. 6 and 7, the air-floating belt conveyor has an endless belt 3 between a driving pulley 1 and a driven pulley 2 that are rotatably arranged at predetermined intervals. The trough members 4, 5 are extended as support members on the lower surface side of the belt 3, and the air ducts 7, to which air is supplied by the blower 6, are provided on the lower surface side in the width direction of the trough members 4, 5. 8 and at the center in the width direction of the trough members 4, 5, air outlets 9, 10 for blowing the air supplied to the air ducts 7, 8 to the upper surface side of the trough members 4, 5 are drilled. Further, a supply chute 11 for supplying the loose material onto the belt 3 is installed at the upstream end position in the forward path (the side where the loose article is conveyed) of the belt 3, and the belt 3 is disposed at the downstream end position in the forward path of the belt 3. Conveyed by 3 It has installed formed by constituting the discharge chute 12 for paying out a La material.

  In the figure, 13 is an air supply pipe for guiding air from the blower 6 to the air duct 7, 14 is a flow rate adjusting valve provided in the air supply pipe 13, and 15 is an air duct for supplying air from the blower 6. An air supply pipe 16 leading to 8 is a flow rate adjusting valve provided in the middle of the air supply pipe 15. The air supply means 17 is constituted by the blower 6, the air supply pipes 13 and 15, and the flow rate adjusting valves 14 and 16. Has been.

  In the air-floating belt conveyor, air is pumped by the blower 6 of the air supply means 17 while the drive pulley 1 is driven to rotate, and the air flow rate is adjusted by adjusting the opening of the flow rate adjusting valves 14 and 16. When supplied from the pipes 13 and 15 to the air ducts 7 and 8, the air supplied to the air ducts 7 and 8 is ejected from the outlets 9 and 10 to the upper surface side of the trough members 4 and 5, and the trough members 4 and 5. In this state, an air layer is formed between the belt 3 and the belt 3 so that the belt 3 circulates and moves between the forward path and the backward path. The loose material is conveyed by the belt 3 and discharged to the discharge chute 12.

  In the example of FIG. 7, the cross-sectional shape of the belt 3 is an arc shape in which the upper surface side is recessed in a valley shape on the forward path, and the V-shape in which the upper surface side is recessed in a valley shape on the return path. Some have a protruding arc shape.

  With such a configuration, in the air levitation belt conveyor, the belt 3 can be moved without causing noise and vibration with extremely low resistance, and a general type of belt belt conveyor in which a general belt is supported by a carrier roller. Thus, the work environment and the surrounding environment are not affected by the noise and vibration generated by the rotation of the roller.

  For example, Patent Document 1 shows a general technical level of a conventional air levitation belt conveyor.

JP 2009-269949 A

  However, in the conventional air levitation belt conveyor as described above, the trough member 5 on the return path side made of a flat steel plate having a V shape is formed by the wrinkles of the belt 3 that curves so as to follow the trough member 4 on the forward path side. The entire surface of the belt 3 is not lifted up, and the end of the belt 3 is likely to come into contact with the trough member 5, and the running resistance of the belt 3 increases to drive the drive pulley 1 (not shown). In addition to the necessity of increasing the capacity, the belt 3 and the trough member 5 have the disadvantages that the wear at the contact points with each other becomes severe.

  In addition, in order to reduce the number of contact portions of the belt 3 as much as possible, it is necessary to finish the surface of the trough member 5 with a grinder or the like. This increases the number of processing steps on the site, increases the processing installation cost, and requires installation. It also had the disadvantage that the construction period was prolonged.

  In view of such circumstances, the present invention can reduce the running resistance of the belt on the return path, reduce the capacity of the drive motor, suppress wear at the contact point of the belt, It is an object of the present invention to provide a return side belt support structure for an air levitation belt conveyor that can reduce processing installation costs and shorten the installation period.

In the present invention, a belt is looped endlessly between a plurality of pulleys that are rotatably arranged with a predetermined interval, and a trough member that is curved is extended on the lower surface side of the forward path of the belt, In the return side belt support structure of the air levitation type belt conveyor that circulates and moves the belt from the trough member by supplying air to the trough member upper surface side,
A plurality of air outlet pipes extending in the moving direction on the lower surface side of the return path of the belt and arranged at a required interval in the width direction of the belt, and having an air outlet formed on the upper surface side;
Air supply means for supplying air to the air outlet pipe,
The present invention relates to a return-side belt support structure for an air-floating belt conveyor, wherein an air reservoir is recessed on the upper surface side where an air outlet of the air outlet pipe is formed.

  According to the above means, the following operation can be obtained.

  With the above-described configuration, in the belt return path, the belt that is supported in surface contact by the trough member is floated while being supported in line contact by the air outlet pipe having the air reservoir recessed in the upper surface side. Therefore, even if there is a bend on the belt that curves to follow the trough member on the forward path side, the end of the belt on the return path side is prevented from contacting the air outlet pipe, and the running resistance of the belt is reduced. Thus, it is not necessary to increase the capacity of the drive motor that rotationally drives the pulley, and wear at the contact point between the belt and the air blowing pipe is suppressed.

  In addition, as in the past, in order to reduce the number of parts that contact the belt as much as possible, it is not necessary to finish the surface of the trough member on the return path smoothly with a grinder, etc., reducing the number of on-site processing steps and reducing processing installation costs. In addition, the construction period required for installation can be shortened.

  Moreover, since the air reservoir is recessed on the upper surface side where the air outlets of the plurality of air outlet pipes are drilled, the pressure of the air blown from the air outlet pipe is stored in the air reservoir. Thus, the belt acts efficiently and becomes effective in raising the belt.

  In the return-side belt support structure of the air-floating belt conveyor, a wear-resistant member having a lower friction coefficient than that of the air blowing pipe is embedded in belt contact portions at both edges of the air reservoir of the air blowing pipe. In this way, the wear at the contact point between the belt and the air blowing pipe is further suppressed, and when wear progresses, only the wear-resistant member is replaced without replacing the entire air blowing pipe. Just do it.

  Further, in the return side belt support structure of the air levitation belt conveyor, the arrangement position of the air blowing pipe in the belt width direction can be shifted by a required amount for each predetermined length of the air blowing pipe. In this way, it is possible to disperse the contact points of the belt and the air blowing pipe, which is effective in further suppressing wear.

  Furthermore, in the return path side belt support structure of the air levitation belt conveyor, the return path of the belt can be arranged above the forward path of the belt. While falling on the forward belt, it can be automatically collected, while the forward belt and the return belt can be compactly combined to save space. .

  According to the return side belt support structure of the air levitation type belt conveyor of the present invention, the running resistance of the return side belt can be reduced, the capacity of the drive motor can be reduced, and wear at the contact point of the belt can be suppressed. In addition, it is possible to achieve an excellent effect of reducing the number of processing steps and processing installation costs at the site and shortening the installation work period.

  Further, when the return path of the belt is disposed above the forward path of the belt, the excellent effect that the loose matter attached to the belt can be automatically collected on the forward path belt and space can be saved. Can be played.

It is a front sectional view showing the first example of the return side belt support structure of the air floating type belt conveyor of the present invention. It is sectional drawing which shows the air blowing pipe in the 1st Example of the return side belt support structure of the air floating type belt conveyor of this invention. It is a top view which shows the belt width direction arrangement | positioning position of the air blowing pipe in the 1st Example of the return side belt support structure of the air floating type belt conveyor of this invention. It is a whole schematic block diagram which shows the 2nd Example of the return path side belt support structure of the air floating type belt conveyor of this invention. It is a front sectional view showing a second embodiment of the return side belt support structure of the air levitation belt conveyor of the present invention. It is a whole schematic block diagram which shows an example of the conventional air floating type belt conveyor. It is a front sectional view showing an example of a conventional air levitation belt conveyor.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 3 show a first embodiment of a return side belt support structure for an air levitation belt conveyor according to the present invention. In the figure, the same reference numerals as those in FIGS. 6 and 7 denote the same parts. The basic configuration is the same as the conventional one shown in FIGS. 6 and 7, but the feature of the first embodiment is that the lower surface of the return path of the belt 3 as shown in FIGS. On the side, a plurality of (four in the example shown in the figure) air outlet pipes 20 having air outlets 18 formed on the upper surface side are spaced in the width direction of the belt 3 so as to extend in the moving direction of the belt 3. The air supply pipe 15 of the air supply means 17 is connected to the air outlet pipe 20, and the air reservoir 21 is recessed on the upper surface side where the outlet 18 of the air outlet pipe 20 is drilled. It is in the point.

  In the case of the first embodiment, the belt 3 contact portions at both edges of the air reservoir 21 of the air blowing pipe 20 have wear resistance having a lower friction coefficient than that of the air blowing pipe 20 as shown in FIG. The member 24 is embedded. As the wear resistant member 24, for example, a polymer resin or the like can be used.

  Further, the position of the air blowing pipe 20 in the width direction of the belt 3 is shifted by a required amount for each predetermined length of the air blowing pipe 20, as shown in FIG.

  Next, the operation of the first embodiment will be described.

  When configured as described above, the belt 3 supported in surface contact by the trough member 5 (see FIG. 7) in the return path of the belt 3 is lined by the air outlet pipe 20 in which the air reservoir 21 is recessed on the upper surface side. Since the air levitates while being supported in a contact manner, the end of the belt 3 on the return path is connected to the air outlet pipe 20 even if there is a wrinkle of the belt 3 that curves so as to follow the trough member 4 on the forward path. Contact with the belt 3, the running resistance of the belt 3 is reduced, and it is not necessary to increase the capacity of a drive motor (not shown) that drives the drive pulley 1 to rotate, and the belt 3 and the air blowing pipe 20 are mutually connected. The wear at the contact point is suppressed.

  Further, as in the prior art, in order to reduce the portion where the belt 3 contacts as much as possible, it is not necessary to finish the surface of the trough member 5 on the return path side (see FIG. 7) smoothly with a grinder or the like. As a result, the processing and installation costs can be reduced, and the work period required for installation can be shortened.

  Moreover, since the air reservoir 21 is recessed on the upper surface side where the air outlets 18 of the plurality of air outlet pipes 20 are drilled, the pressure of the air blown from the air outlet pipe 20 is air. The shape is stored in the reservoir portion 21 and acts efficiently on the belt 3, which is effective in raising the belt 3.

  Further, as shown in FIG. 2, a wear-resistant member 24 having a lower friction coefficient than that of the air blowing pipe 20 is embedded in the contact portion of the belt 3 at both edges of the air reservoir 21 of the air blowing pipe 20. Therefore, the wear at the contact point between the belt 3 and the air blowing pipe 20 is further suppressed, and when the wear progresses, only the wear-resistant member 24 is replaced without replacing the entire air blowing pipe 20. Just do it.

  Furthermore, the position of the air blowing pipe 20 in the width direction of the belt 3 is shifted by a required amount for each predetermined length of the air blowing pipe 20, as shown in FIG. It is possible to disperse the contact portions of the blow pipe 20 with each other, which is effective in further suppressing wear.

  In the example of FIG. 1, the air blowing pipe 20 is arranged such that the cross-sectional shape of the belt 3 on the return path is V-shaped, but the cross-sectional shape of the belt 3 on the return path is flat. Alternatively, it is possible to change the arrangement of the air outlet pipe 20 so that the upper surface side has an arc shape protruding in a mountain shape.

  In this way, the running resistance of the belt 3 on the return path side can be reduced, the capacity of the drive motor can be reduced, the wear at the contact point of the belt 3 can be suppressed, and the processing man-hours and processing installation costs at the site can be reduced. The installation period can be shortened.

  4 and 5 show a second embodiment of the return side belt support structure of the air levitation belt conveyor of the present invention. In the figure, the same reference numerals as in FIGS. 1 to 3 denote the same parts. The basic configuration is the same as that of the first embodiment shown in FIGS. 1 to 3, but the feature of the second embodiment is that the belt 3 has a characteristic as shown in FIGS. The return path is located above the forward path of the belt 3.

  In the case of the second embodiment, the belt 3 wound around the drive pulley 1 from the forward path side is sequentially wound around the plurality of driven pulleys 22a, 22b, 22c, and 22d to change the direction thereof, whereby the forward path of the belt 3 is reached. Further, the belt 3 is wound around the driven pulley 2 of the belt 3 by sequentially winding the belt 3 around the driven pulleys 23a, 23b, 23c, and 23d to change the direction. It is supposed to lead to the outward trip.

  In FIG. 4, 30 is a conveyor for supplying loose articles disposed above the supply chute 11 so as to extend in a direction orthogonal to the paper surface of FIG. 4, and 31 is discharged so as to extend in a direction orthogonal to the paper surface of FIG. A loose material discharge conveyor disposed below the chute 12, which drops the rose material supplied by the supply conveyor 30 from the supply chute 11 onto the belt 3, while being discharged to the discharge chute 12. The loose objects are dropped onto the discharge conveyor 31 and carried out to the outside.

  When configured as in the second embodiment shown in FIGS. 4 and 5, as in the first embodiment shown in FIGS. 1 to 3, the trough member 5 (see FIG. 7) is in surface contact in the return path of the belt 3. Since the supported belt 3 is in the form of air levitation while being supported in line contact by the air outlet pipe 20 having the air reservoir 21 recessed on the upper surface side, it follows the trough member 4 on the forward path side. Even if the curled belt 3 has wrinkles, the end of the belt 3 on the return path side is prevented from coming into contact with the air blowing pipe 20, and the driving resistance of the belt 3 is reduced to drive the drive pulley 1 to rotate. It is not necessary to increase the capacity of the belt 3 (not shown), and wear at the contact point between the belt 3 and the air blowing pipe 20 is suppressed. To reduce It is no longer necessary to finish the surface of the trough member 5 (see FIG. 7) smoothly with a grinder, etc., reducing the number of on-site processing steps, reducing processing installation costs, and shortening the work period required for installation, Since the air reservoir 21 is recessed on the upper surface side where the air outlets 18 of the plurality of air outlet pipes 20 are drilled, the pressure of the air blown from the air outlet pipe 20 is reduced to the air reservoir. 21 is stored in the belt 3 and acts efficiently on the belt 3, which is effective in raising the belt 3, and further, by arranging the return path of the belt 3 above the forward path of the belt 3, The loose material adhering to the belt 3 falls onto the forward belt 3 and can be automatically collected, while the forward belt 3 and the backward belt 3 are shown in FIG. Compact belt 3 Collectively, it is also possible to achieve space saving.

  Incidentally, the reason why the return path of the belt 3 can be arranged above the forward path of the belt 3 is that the air reservoir 21 is recessed on the upper surface side where the outlets 18 of the plurality of air outlet pipes 20 are drilled. The pressure of the air blown out from the air blowing pipe 20 is stored in the air reservoir 21 and acts on the belt 3 efficiently, and only the air blowing pipe 20 arranged at intervals, particularly the lower surface of the belt 3. This is because the belt 3 can be levitated without forming an air chamber that is covered.

  In the case of the second embodiment shown in FIGS. 4 and 5, the belt 3 abutting portions at both edges of the air reservoir 21 of the air blowing pipe 20 are formed in the same manner as the example shown in FIG. The wear-resistant member 24 having a lower friction coefficient than that of the air blowing pipe 20 can be embedded. In this way, wear at the contact point between the belt 3 and the air blowing pipe 20 is further suppressed, and wear has progressed. In this case, it is only necessary to replace the wear-resistant member 24 without replacing the entire air blowing pipe 20.

  In the case of the second embodiment shown in FIGS. 4 and 5, the position of the air blowing pipe 20 in the width direction of the belt 3 is set to a predetermined length of the air blowing pipe 20 in the same manner as in the example shown in FIG. It is also possible to shift the required amount every time, and in this way, the contact points of the belt 3 and the air blowing pipe 20 can be dispersed, which is effective in further suppressing wear.

  Furthermore, in the example of FIG. 5, the air blowing pipe 20 is arranged such that the cross-sectional shape of the return path of the belt 3 is a flat shape, but the cross-sectional shape of the return path of the belt 3 is V-shaped. Alternatively, it is possible to change the arrangement of the air blowing pipe 20 so that the upper surface side has an arc shape protruding in a mountain shape.

  Thus, in the second embodiment shown in FIGS. 4 and 5, as in the first embodiment shown in FIGS. 1 to 3, the traveling resistance of the belt 3 on the return path side is reduced and the capacity of the drive motor is reduced. In addition, the wear at the contact point of the belt 3 can be suppressed, the on-site processing man-hours and processing installation costs can be reduced, and the installation period can be shortened. By disposing it above the forward path, the loose matter attached to the belt 3 can be automatically collected on the belt 3 on the forward path side, and space can be saved.

  It should be noted that the return side belt support structure of the air levitation belt conveyor of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. is there.

1 Drive pulley (pulley)
2 Driven pulley (pulley)
3 Belt 4 Trough member 6 Blower 7 Air duct 9 Air outlet 13 Air supply pipe 14 Flow rate adjusting valve 15 Air supply pipe 16 Flow rate adjusting valve 17 Air supply means 18 Air outlet 20 Air outlet pipe 21 Air reservoir 22a Drive pulley (pulley)
22b Driven pulley (pulley)
22c Driven pulley (pulley)
22d Driven pulley (pulley)
23a Driven pulley (pulley)
23b Driven pulley (pulley)
23c Driven pulley (pulley)
23d Driven pulley (pulley)
24 Wear-resistant members

Claims (4)

A belt is looped endlessly between a plurality of pulleys that are rotatably arranged with a required interval, and a trough member that is curved is extended on the lower surface side of the forward path of the belt, and the upper surface side of the trough member In the return side belt support structure of the air levitation belt conveyor that circulates and moves the belt while floating from the trough member by supplying air to the belt,
A plurality of air outlet pipes extending in the moving direction on the lower surface side of the return path of the belt and arranged at a required interval in the width direction of the belt, and having an air outlet formed on the upper surface side;
Air supply means for supplying air to the air outlet pipe,
A return-side belt support structure for an air-floating belt conveyor, wherein an air reservoir is recessed on an upper surface side where an air outlet of the air outlet pipe is formed.   The belt support on the return side of the air levitation belt conveyor according to claim 1, wherein a wear-resistant member having a lower friction coefficient than that of the air blowing pipe is embedded in belt contact portions at both edges of the air reservoir of the air blowing pipe. Construction.   The return-side belt support structure for an air levitation belt conveyor according to claim 1 or 2, wherein a position in the belt width direction of the air blowing pipe is shifted by a required amount for each predetermined length of the air blowing pipe.   The return path side belt support structure for an air-floating belt conveyor according to any one of claims 1 to 3, wherein the return path of the belt is disposed above the forward path of the belt.

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