JP2012136347A - 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, and 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 means 19 having air blowout openings 18 drilled in the upper surfaces are arranged on a lower surface side of the returning passage of the belt 3 in a manner of extending in the direction of the movement of the belt 3 and at necessary intervals in the width direction of the belt 3, and an air supply pipe 15 of an air supply means 17 is connected to the air blowout means 19.

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. 5 and 6, the air-floating type belt conveyor has an endless belt 3 between a driving pulley 1 and a driven pulley 2 that are rotatably arranged at a predetermined interval. 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. 6, 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 return path has a V shape in which the upper surface side is recessed in a valley shape. 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 driving pulley and a driven pulley 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. In the return side belt support structure of the air levitation type belt conveyor that circulates and moves the belt while floating from the trough member by supplying air to the upper surface side of the trough member,
A plurality of air blowing means extending in the moving direction on the return path lower surface side of the belt and disposed at a required interval in the width direction of the belt, and having an air outlet formed on the upper surface side;
And an air supply means for supplying air to the air blowing means.

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

  With the configuration as described above, the belt supported in surface contact by the trough member in the belt return path is floated while being supported in line contact by the air blowing means. Even if there is a wrinkle of the belt that curves so as to follow, the end of the belt on the return path side can be prevented from coming into contact with the air blowing means, the running resistance of the belt is reduced, and the capacity of the drive motor that drives the drive pulley to rotate And the wear at the contact points of the belt and the air blowing means can be 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.

  In the return side belt support structure of the air-floating belt conveyor, the air blowing means can be constituted by an air blowing pipe.

In this case, a bottom plate disposed at a lower position of the plurality of air blowing pipes,
A side plate that rises from the bottom plate and is airtightly connected to side surfaces of the air blowing pipes disposed at both ends of the plurality of air blowing pipes in the width direction of the belt;
An air chamber surrounded by a belt moving on the plurality of air blowing pipes can be formed, and in this way, not only the pressure of air blown from the air blowing pipe as the air blowing means, The pressure in the air chamber acts on the belt, which is effective for raising the belt.

  In addition, a wear-resistant member having a lower coefficient of friction than the air blowing pipe can be embedded on the upper surface side where the air blowing pipe is formed, and in this way, as the belt and the air blowing means, The wear at the contact points of the air blowing pipes is further suppressed, and when the wear progresses, it is only necessary to replace the wear-resistant member without replacing the entire air blowing pipe.

  Furthermore, 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, the belt and the air blowing means It is possible to disperse the contact points of the air blowing pipes, which is effective in further suppressing wear.

  On the other hand, in the return side belt support structure of the air levitation belt conveyor, the air blowing means is airtightly fixed to the corrugated upper plate on which a plurality of air blowing ridges are formed and the lower surface of the upper plate. It can comprise with the said air blowing protrusion of the air blowing board which consists of a lower board made.

  In this case, a wear-resistant member having a lower coefficient of friction than the upper plate of the air blowing plate can be embedded on the upper surface side where the air blowing protrusion of the air blowing plate is drilled. Further, wear at the contact points of the belt and the air blowing ridge as the air blowing means is further suppressed, and when wear progresses, only the wear-resistant member is replaced without replacing the entire air blowing plate. Just do it.

  Further, the position of the air blowing ridge in the belt width direction can be shifted by a required amount for each predetermined length of the air blowing ridge, and in this way, the air as the belt and the air blowing means It is possible to disperse the contact points of the blowing ridges, which is effective in further suppressing wear.

  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.

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 perspective view 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 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 of an air levitation belt conveyor according to the present invention. In the figure, the same reference numerals as those in FIGS. 5 and 6 denote the same parts. The basic configuration is the same as that of the conventional one shown in FIGS. 5 and 6, 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 air blowing means 19 having air blowing holes 18 formed on the upper surface side are arranged at a predetermined interval 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 blowing means 19.

  In the case of the first embodiment, the air blowing means 19 is composed of a plurality of (four in the illustrated example) air blowing pipes 20, and a bottom plate 21 is disposed below the plurality of air blowing pipes 20. A side plate 22 rising from the bottom plate 21 is hermetically connected to side surfaces of the air blowing pipes 20 disposed at both ends in the width direction of the belt 3 among the plurality of air blowing pipes 20; An air chamber 23 surrounded by the side plate 22 and the belt 3 moving on the plurality of air blowing pipes 20 is formed. The air supply pipe 15 of the air supply means 17 passes through the bottom plate 21 and is connected to the lower surface side of each air outlet pipe 20 in the air chamber 23. The bottom plate 21 of the air outlet pipe 20 The penetrating part is kept airtight so that air in the air chamber 23 does not leak.

  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 on the upper surface side of the air blowing pipe 20 where the air outlet 18 is formed. 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. 6) in the return path of the belt 3 is supported in line contact by the air blowing pipe 20 as the air blowing means 19. Since the air floats up, the end of the belt 3 on the return path is the air blowing pipe 20 as the air blowing means 19 even if the belt 3 is bent 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) for rotationally driving the drive pulley 1, and as the belt 3 and the air blowing means 19 Wear at the contact points of the air blowing pipes 20 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 no longer necessary to smoothly finish the surface of the trough member 5 (see FIG. 6) on the return path side with a grinder, etc. As a result, the processing and installation costs can be reduced, and the work period required for installation can be shortened.

  Moreover, a bottom plate 21 disposed at a lower position of the plurality of air blowing pipes 20, and rising from the bottom plate 21 and disposed at both ends of the plurality of air blowing pipes 20 in the width direction of the belt 3. Since the air chamber 23 surrounded by the side plate 22 that is airtightly connected to the side surface of the air blowing pipe 20 and the belt 3 that moves on the plurality of air blowing pipes 20 is formed, the air blowing means 19 is formed. In addition to the pressure of the air blown out from the air blowing pipe 20, the pressure in the air chamber 23 acts 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 on the upper surface side of the air blowing pipe 20 where the air outlet 18 is drilled. 3 and the air blowing pipe 20 as the air blowing means 19 are further prevented from being worn at each other contact point, 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 air blowing pipe 20 as the blowing means 19, which is effective in further suppressing wear.

  The arrangement of the air blowing pipe 20 as the air blowing means 19 is such that the cross-sectional shape of the belt 3 in the return path is V-shaped in the example of FIG. It is also possible to change the arrangement of the air blowing pipe 20 as the air blowing means 19 so that the shape is a flat shape or an arc shape whose upper surface protrudes 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.

  FIG. 4 is a second embodiment of the return-side belt support structure of the air levitation belt conveyor of the present invention, and in the figure, the parts denoted by the same reference numerals as in FIGS. 1 to 3 represent the same thing, Although the basic configuration is the same as that of the first embodiment shown in FIGS. 1 to 3, the feature of the second embodiment is that, as shown in FIG. The point which comprised the said air blowing protrusion 25 of the air blowing board 28 which consists of the corrugated upper board 26 in which the blowing protrusion 25 was formed, and the lower board 27 airtightly fixed to the lower surface of this upper board 26 It is in.

  When configured as in the second embodiment shown in FIG. 4, the belt 3 supported in surface contact by the trough member 5 (see FIG. 6) in the return path of the belt 3 serves as the air blowing means 19 of the air blowing board 28. The air blowing ridge 25 supports the air levitation while being supported in a line contact manner, so that even if there is a wrinkle of the belt 3 that curves to follow the trough member 4 on the forward path side, the belt 3 on the return path side. Is not contacted with the air blowing ridge 25 as the air blowing means 19 of the air blowing board 28, the driving resistance of the belt 3 is reduced, and a driving motor (not shown) for driving the driving pulley 1 to rotate. ) Is not required to be increased, and wear at the contact points of the air blowing ridges 25 as the air blowing means 19 of the belt 3 and the air blowing plate 28 is suppressed, 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 (see FIG. 6) on the return path smoothly with a grinder, etc., reducing the number of processing steps at the site and reducing the processing installation cost. In addition, the construction period required for installation can be shortened.

  In the case of the second embodiment shown in FIG. 4, in the same manner as in the example shown in FIG. 2, the air is provided on the upper surface side where the air outlet 18 of the air outlet rib 25 of the air outlet 28 is drilled. The wear-resistant member 24 having a lower friction coefficient than the upper plate 26 of the blowing board 28 can be embedded, and in this way, the wear at the contact point between the belt 3 and the air blowing protrusion 25 as the air blowing means 19 is achieved. When the wear progresses, it is only necessary to replace the wear-resistant member 24 without replacing the entire air blowing board 28.

  In the case of the second embodiment shown in FIG. 4, the position of the air blowing ridge 25 in the width direction of the belt 3 for each predetermined length of the air blowing ridge 25 is the same as the example shown in FIG. 3. It is also possible to shift the required amount, and in this way, it is possible to disperse the contact points of the belt 3 and the air blowing ridges 25 as the air blowing means 19 to further suppress wear. It becomes effective.

  Furthermore, the air blowing disk 28 as the air blowing means 19 has a flat plate shape in the example of FIG. 4, but the cross-sectional shape of the return path of the belt 3 is V-shaped, or the upper surface side is a mountain. It is also possible to change the shape of the air blowing board 28 as the air blowing means 19 so as to have a circular arc shape protruding in a shape.

  Thus, in the second embodiment shown in FIG. 4 as well as in the first embodiment shown in FIGS. 1 to 3, the running resistance of the belt 3 on the return path side can be reduced, and the capacity of the drive motor can be reduced. Wear at the contact point of the belt 3 can be suppressed, and the number of on-site processing steps and processing installation costs can be reduced and the installation period can be shortened.

  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.

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 19 Air outlet means 20 Air outlet pipe 21 Bottom plate 22 Side plate 23 Air Chamber 24 Wear-resistant member 25 Air blowout ridge 26 Upper plate 27 Lower plate 28 Air blowout plate

Claims (8)

A belt is looped endlessly between a driving pulley and a driven pulley that are rotatably arranged at a required 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 blowing means extending in the moving direction on the return path lower surface side of the belt and disposed at a required interval in the width direction of the belt, and having an air outlet formed on the upper surface side;
An air supply means for supplying air to the air blowing means, and a return side belt support structure for an air floating belt conveyor.   2. The return side belt support structure of an air levitation type belt conveyor according to claim 1, wherein said air blowing means comprises an air blowing pipe. A bottom plate disposed at a lower position of the plurality of air blowing pipes;
A side plate that rises from the bottom plate and is airtightly connected to side surfaces of the air blowing pipes disposed at both ends of the plurality of air blowing pipes in the width direction of the belt;
The return side belt support structure for an air levitation belt conveyor according to claim 2, wherein an air chamber surrounded by a belt moving on the plurality of air blowing pipes is formed.   4. A return-side belt support structure for an air-floating belt conveyor according to claim 2, wherein a wear-resistant member having a lower friction coefficient than that of the air blowing pipe is embedded on the upper surface side where the air blowing pipe is formed. .   The return path of the air levitation belt conveyor according to any one of claims 2 to 4, 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. Side belt support structure.   The air blowing means is the air blowing ridge of an air blowing plate comprising a corrugated upper plate formed with a plurality of air blowing ridges and a lower plate airtightly fixed to the lower surface of the upper plate. The return path side belt support structure of the air floating type belt conveyor of Claim 1 comprised.   The air levitation belt conveyor according to claim 6, wherein a wear-resistant member having a lower coefficient of friction than that of the upper plate of the air blowing plate is embedded in an upper surface side of the air blowing ridge of the air blowing plate. Inward belt support structure.   The return side belt support structure for an air-lifting belt conveyor according to claim 6 or 7, wherein the position of the air blowing ridge in the belt width direction is shifted by a required amount for each predetermined length of the air blowing ridge.

Images