JP2009269749A - Trough expansion joint part structure of air floating type rollerless belt conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trough expansion joint part structure of an air floating type rollerless belt conveyor allowing improvement of sealing property by a backing trough and avoiding of damage of the backing trough when an earthquake occurs, while surely absorbing expansion-contraction of a trough member. <P>SOLUTION: The backing trough 13 is mounted to hold at least liquid-tightness at an end part of one trough member 4 divided at a longitudinal direction required portion to absorb the expansion-contraction according to a temperature difference. The backing trough 13 is extended to an end part side of the divided other trough member 4 to cover a clearance c formed between the trough members 4 from a back side. An elastic tube member 17 supplied with pressurized air to the inside from a pressurized air supply means is interposed between the backing trough 13 and an end part of the divided other trough member 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a trough expansion joint structure of an air floating type rollerless belt conveyor.

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

  For example, as shown in FIGS. 4 and 5, the air-floating rollerless belt conveyor has a carrier belt 3 disposed between a driving pulley 1 and a driven pulley 2 that are rotatably arranged at a predetermined interval. An air duct 7 that extends endlessly, extends trough members 4 and 5 on the lower surface side of the carrier belt 3, and is supplied with air by a blower 6 on the lower surface side in the center in the width direction of the trough members 4 and 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 carrier belt 3 is installed at an upstream end position on the forward path (a side for conveying loose objects) of the carrier belt 3, and a downstream end of the carrier belt 3 on the forward path The location has installed formed by constituting the discharge chute 12 for paying out the rose was carried by the carrier belt 3.

  In the air-floating rollerless belt conveyor, when air is supplied to the air ducts 7 and 8 by the blower 6 while the drive pulley 1 is driven to rotate, the air supplied to the air ducts 7 and 8 is blown out from the air outlet 9. , 10 are ejected from the trough members 4 and 5 to the upper surface side, and an air layer is formed between the trough members 4 and 5 and the carrier belt 3 so that the carrier belt 3 floats and circulates in the forward path and the return path. In this state, when a loose article is supplied from the supply chute 11 onto the carrier belt 3, the loose article is conveyed by the carrier belt 3 and delivered to the discharge chute 12.

  In the example of FIG. 5, the cross-sectional shape of the carrier belt 3 is an arc shape in which the upper surface side is recessed in a valley shape on the forward path, and the arc shape in which the upper surface side protrudes in a mountain shape on the return path. Some have a V shape that is recessed.

  With such a configuration, in the air floating type rollerless belt conveyor, the carrier belt 3 can be moved without causing noise or vibration with extremely low resistance, and a general carrier belt is supported by the carrier roller. Unlike the roller belt conveyor, noise and vibration caused by the rotation of the rollers do not affect the work environment and the surrounding environment.

  By the way, in the air-floating type rollerless belt conveyor as described above, the trough members 4 and 5 are long and continuous structures over the entire length of the conveying distance, and it is necessary to absorb expansion and contraction due to temperature difference between summer and winter. Therefore, an expansion joint portion is provided at a required position in the longitudinal direction of the trough members 4 and 5.

  6 and 7 show an example of a trough expansion joint part structure of a conventional air levitation type rollerless belt conveyor, and in one of the trough members 4 divided so as to face each other in the longitudinal direction, The backing trough 13 as a backing cover member that is curved so as to follow the curvature of the lower surface of the trough member 4 is made of bolts, nuts, etc. so that the clearance c formed between the trough members 4 is covered from the back side. Even if the clearance c is changed by the expansion and contraction of the trough member 4, the other trough member 4 on the side where the backing trough 13 is not fixed and the backing trough 13 are relative to each other. Thus, the expansion / contraction of the trough member 4 is absorbed.

For example, Patent Document 1 shows a general technical level of a conventional air floating type rollerless belt conveyor.
JP 10-316244 A

  However, in the trough expansion joint structure of the conventional air-floating rollerless belt conveyor as described above, the backing trough 13 is formed by bending a steel plate with a press, so that the manufacturing accuracy can be sufficiently increased. Difficult, the adhesion between the other trough member 4 on the side where the backing trough 13 is not fixed and the backing trough 13 is poor, and the sealing performance is poor, especially when transporting coal etc. wet with rainwater In some cases, water containing dust such as coal exudes from the gap between the other trough member 4 and the backing trough 13.

  In view of such circumstances, the present invention is intended to provide a trough expansion joint structure for an air-lifting rollerless belt conveyor that can improve the sealing performance of a backing trough while reliably absorbing expansion and contraction of the trough member. To do.

In the present invention, a carrier 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 carrier belt. In the trough expansion joint structure of the air-lifting rollerless belt conveyor that circulates and moves the carrier belt while floating from the trough member by supplying air to the upper surface side of the trough member,
A trough member divided at a required position in the longitudinal direction so as to absorb expansion and contraction due to a temperature difference;
To the end portion of the other divided trough member, attached to the end portion of the one divided trough member so as to maintain at least liquid tightness and to cover the clearance formed between the trough members from the back side. The overhanging trough,
An elastic tube member supplied with pressurized air therein and interposed between the backing trough and the end of the other divided trough member to maintain at least liquid-tightness;
The invention relates to a trough expansion joint part structure of an air floating type rollerless belt conveyor, characterized in that it includes a pressurized air supply means for supplying pressurized air to the elastic tube member.

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

  The backing trough is attached to an end portion of one trough member that is divided so as to face each other at a required position in the longitudinal direction, and covers the clearance formed between the trough members from the back side. Projecting toward the end of the other divided trough member, and between the backing trough and the end of the other divided trough member, from the pressurized air supply means to the inside When an elastic tube member to which pressurized air is supplied is interposed and at least liquid tightness is maintained, and the clearance changes due to expansion and contraction of the trough member in this state, the other trough member By the relative sliding of the elastic tube member, the expansion / contraction of the trough member is absorbed.

  As a result, unlike the conventional trough expansion joint structure of air-lifted rollerless belt conveyors, the backing trough is manufactured by simply forming and sliding the backing trough by press bending of a steel plate. Even if the accuracy is not sufficiently increased, the elastic tube member to which the pressurized air is supplied from the pressurized air supply means improves the adhesion to the divided portion of the trough member, and the sealing performance is improved. Even when transporting coal wet with rainwater, there is no fear that water containing dust such as coal will ooze out from the gap between the trough member and the backing trough.

  Even when the trough member and the backing trough slide relatively large with an impact force when an earthquake occurs, the elastic tube member is interposed between the backing trough and the other trough member. Therefore, the backing trough can follow the movement of the trough member without being damaged.

  In the trough expansion joint structure of the air floating type rollerless belt conveyor, the pressurized air supply means includes a pressure source of pressurized air, a pressurized air line connecting the pressure source and the elastic tube member, The pressure control valve provided in the middle of the pressurized air line can be configured, and in this way, the pressure source is pressurized by adjusting the opening of the pressure control valve of the pressurized air supply means. It becomes possible to maintain the pressure of the pressurized air supplied to the elastic tube member via the air line at an appropriate value.

  According to the trough expansion joint structure of the air floating type rollerless belt conveyor of the present invention, it is possible to improve the sealing performance by the backing trough while reliably absorbing the expansion and contraction of the trough member, and at the time of the occurrence of an earthquake. An excellent effect of avoiding breakage of the trough can be obtained.

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

  1 to 3 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 4 to 7 denote the same components, and the basic configuration is shown in FIGS. Although it is the same as the conventional one shown in FIG. 7, the feature of this example is that it is divided at a required portion in the longitudinal direction so as to absorb expansion and contraction due to a temperature difference, as shown in FIGS. A backing trough 13 is attached to the end of the one trough member 4 so as to maintain at least liquid-tightness, and the backing trough 13 is projected to the end of the other divided trough member 4. The clearance c formed between the trough members 4 is covered from the back side, and the pressurized air supply means 16 is provided between the backing trough 13 and the end portion of the other divided trough member 4. An elastic tube member 17 to which pressurized air is supplied from the inside is interposed And a, it lies in that to constitute a trough expansion joints.

  In the illustrated example, the pressurized air supply means 16 includes a pressurized air pressure source 16a, a pressurized air line 16b connecting the pressure source 16a and the elastic tube member 17, and the pressurized air line 16b. It is comprised from the pressure control valve 16c provided in the middle.

  A flange portion 13 a is formed on the base end side of the backing trough 13, and the flange portion 13 a is bolted and nuted with respect to the flange portion 4 a projecting to the outer periphery at the end portion of the one trough member 4. However, it is possible to maintain liquid-tightness by interposing a gasket (not shown) between the flange portions 4a and 13a. . A reinforcing flange portion 13b is formed on the outer periphery of the intermediate portion between the base end and the tip end of the backing trough 13.

  Next, the operation of the illustrated example will be described.

  The backing trough 13 is attached to an end portion of one trough member 4 divided so as to face each other at a required position in the longitudinal direction so as to maintain at least liquid tightness, and a clearance c formed between the trough members 4 Is extended to the end side of the other divided trough member 4 so as to cover from the back side, and further, between the backing trough 13 and the end portion of the other divided trough member 4 is added. An elastic tube member 17 that is supplied with pressurized air from the compressed air supply means 16 is interposed to maintain at least liquid-tightness. In this state, the clearance c changes due to expansion and contraction of the trough member 4. In this case, the other trough member 4 and the elastic tube member 17 slide relative to each other so that the expansion / contraction of the trough member 4 is absorbed.

  As a result, unlike the trough expansion joint structure of a conventional air-floating rollerless belt conveyor, the backing trough 13 is different from simply forming and sliding the backing trough 13 by press bending of a steel plate. Even if the manufacturing accuracy is not sufficiently improved, the elastic tube member 17 to which the pressurized air is supplied from the pressurized air supply means 16 improves the adhesion to the divided portion of the trough member 4 and improves the sealing performance. In particular, even when coal or the like wet with rainwater is transported, there is no fear that water containing dust such as coal will ooze out from the gap between the trough member 4 and the backing trough 13.

  Here, the pressure of the pressurized air supplied from the pressure source 16a to the elastic tube member 17 through the pressurized air line 16b by adjusting the opening of the pressure regulating valve 16c of the pressurized air supply means 16 is as follows. It is held at an appropriate value.

  Further, even if the trough member 4 and the backing trough 13 slide relatively large with an impact force when an earthquake occurs, the elasticity between the backing trough 13 and the other trough member 4 can be reduced. Since the tube member 17 is interposed, the backing trough 13 can follow the movement of the trough member 4 without being damaged.

  Thus, the sealing performance of the backing trough 13 can be improved while reliably absorbing the expansion / contraction of the trough member 4, and the damage of the backing trough 13 can be avoided when an earthquake occurs.

  In addition, the trough expansion joint part structure of the air levitation type rollerless belt conveyor of the present invention is not limited to the above illustrated example, and various modifications can be made without departing from the gist of the present invention. Of course.

It is a front sectional view showing an example of an embodiment for carrying out the present invention. It is a side view which shows an example of embodiment which implements this invention, Comprising: It is the II-II arrow equivalent view of FIG. It is a top view which shows an example of embodiment which implements this invention, Comprising: It is the III-III cross-section equivalent figure of FIG. It is a whole schematic block diagram which shows an example of the conventional air floating type rollerless belt conveyor. It is a principal part cross-sectional perspective view which shows an example of the conventional air floating type rollerless belt conveyor. It is a front sectional view showing an example of a trough expansion joint part structure of a conventional air floating type rollerless belt conveyor. It is a side view which shows an example of the trough expansion joint part structure of the conventional air floating type rollerless belt conveyor, Comprising: It is a VII-VII arrow equivalent view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive pulley 2 Drive pulley 3 Carrier belt 4 Trough member 13 Backing trough 13a Flange part 13b Reinforcement flange part 15 Fastening member 16 Pressurized air supply means 16a Pressure source 16b Pressurized air line 16c Pressure control valve 17 Elastic tube member c Clearance

Claims (2)

A carrier belt is looped endlessly between a drive pulley and a driven pulley, which are rotatably arranged at a required interval, and a curved trough member is extended on the lower surface side of the carrier belt, In the trough expansion joint structure of an air-lifting rollerless belt conveyor that circulates and moves the carrier belt while floating from the trough member by supplying air to the upper surface side of the trough member,
A trough member divided at a required position in the longitudinal direction so as to absorb expansion and contraction due to a temperature difference;
To the end portion of the other divided trough member, attached to the end portion of the one divided trough member so as to maintain at least liquid tightness and to cover the clearance formed between the trough members from the back side. The overhanging trough,
An elastic tube member supplied with pressurized air therein and interposed between the backing trough and the end of the other divided trough member to maintain at least liquid-tightness;
A trough expansion joint structure for an air-floating rollerless belt conveyor, comprising: pressurized air supply means for supplying pressurized air to the elastic tube member.   The pressurized air supply means comprises a pressurized air pressure source, a pressurized air line connecting the pressure source and the elastic tube member, and a pressure control valve provided in the middle of the pressurized air line. The trough expansion joint part structure of the air floating type roller-less belt conveyor of Claim 1.

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