JP2016124633A - Air floating type belt conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air floating type belt conveyor device capable of reducing recovery work after a fire outbreak.SOLUTION: The air floating type belt conveyor device includes a conveyor body Cm having an endless conveyor belt 1 and configured to place a conveyed article on the conveyor 1 to convey it in a predetermined direction, an approach route side belt guiding part 4 having a cylindrical body into which an approach route side part 1a of the conveyor belt 1 having the conveyed article mounted thereon is inserted, and a plurality of air supply holes provided in the bottom part of the cylindrical body to supply air between the approach side part and the inner bottom part of the cylindrical body, air supply means SA for supplying air to the air supply holes, a plurality of partition devices D1 to D5 for partitioning sectioning planned areas from the unpartitioned state of the sectioning planned areas, a plurality of sectioning planned areas A1 to A4 adjacent to each other in a longitudinal direction being defined in advance inside the cylindrical body, and inactive gas supply means SG1 for supplying inactive gas to each sectioning planned area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air levitation belt conveyor device for conveying bulk materials such as coal and grains such as wheat, soybeans, and rice.

  In recent years, bulk materials (for example, coal, gypsum and wet ash in thermal power plants, iron ore and secondary materials in steelworks, etc.), and grains such as wheat, soybeans, and rice (hereinafter referred to as transported items) 2. Description of the Related Art Air-lifting belt conveyor devices that are effective for dust countermeasures and noise countermeasures are known for smoothly conveying belt conveyor devices (see, for example, Patent Documents 1 and 2).

  In the air levitation type belt conveyor device, belt guide portions having troughs of various shapes such as a tubular shape and an arc shape are provided for each of the forward side and the return side of the conveyor belt. A conveyor belt is disposed on the trough of each belt guide. A large number of air supply holes are provided at the bottom of the trough. Air is supplied between the forward and return troughs and the conveyor belt to float the conveyor belt, and the object to be conveyed is placed on the forward conveyor belt. It is comprised so that it may carry by carrying. And the belt guide part including a trough is comprised by the cylinder shape for dust countermeasures.

JP 2004-224551 A JP 2005-263388 A

  Some of the above conventional air levitation belt conveyor devices are equipped with a sprinkling type fire extinguishing equipment in order to reduce the damage caused by the fire of the conveyed object. In this fire extinguishing equipment, for example, a plurality of watering nozzles are arranged in the transport direction above the belt guide portion on the forward path side.

  However, when the sprinkling fire extinguishing system actually operates, the entire inside of the cylindrical belt guide will be submerged, so not only replacement of damaged parts such as belts but also cleaning of the air supply path including the air supply hole, etc. Will also be required, and the restoration work will take a very long time.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an air-floating type belt conveyor device that can reduce recovery work after a fire occurs.

  In order to achieve the above object, an air levitation type belt conveyor apparatus according to an embodiment of the present invention has an endless conveyor belt, and a conveyor main body that conveys objects to be conveyed on the conveyor belt in a predetermined direction. And a cylindrical body into which the forward path portion on which the conveyed object of the conveyor belt is placed is inserted, and air is supplied to the bottom of the cylindrical body between the forward path side portion and the inner bottom of the cylindrical body. A forward belt guide portion provided with a plurality of air supply holes, an air supply means for supplying air to the air supply holes, and a plurality of scheduled areas adjacent to each other in the longitudinal direction inside the cylinder Are determined in advance, and a plurality of partition devices for partitioning the planned partition area from a state where the planned partition area is not partitioned, and an inert gas for supplying an inert gas to each of the planned partition areas It includes a scan supply means, a.

  According to this configuration, when a fire occurs in a certain planned partition area, both ends of the planned partition area are partitioned by the partition device, and the inert gas is supplied to the planned partition area by the inert gas supply means. Can be extinguished. By extinguishing the fire using the inert gas in this manner, the outward belt guide portion is not submerged, so that it can be restored only by exchanging and repairing the damaged portion, and the restoration work can be reduced.

  The apparatus further comprises temperature detection means for detecting the temperature of each of the planned section areas, and when the detected temperature of the planned section area by the temperature detection means exceeds a predetermined temperature, the conveyor body stops its transport operation. The air supply means stops the supply of air, the partition device partitions the planned partition area where the detected temperature is equal to or higher than a predetermined temperature, and the inert gas supply means determines the detected temperature to be higher than a predetermined temperature. You may be comprised so that an inert gas may be supplied to a division plan area | region.

  According to this configuration, it is possible to automatically detect that a fire has occurred in a certain planned area and extinguish it.

  The air supply means sucks and sends out air, a plurality of air introduction paths for guiding the air sent out from the blower to the air supply holes in each of the planned areas, and each of the air introductions A plurality of valves provided in the middle of the path for opening and closing each of the air introduction paths, wherein the inert gas supply means includes a gas tank storing an inert gas, and the gas tank instead of air to the blower And switching means for supplying the inert gas therein.

  According to this configuration, by using the air introduction path also as the inert gas introduction path, the cost can be reduced as compared with the case where the inert gas introduction path is separately provided.

  The inert gas supply means guides the gas tank storing the inert gas, a blower for sucking and sending the inert gas in the gas tank, and the inert gas sent from the blower to each of the scheduled areas. A plurality of gas introduction passages, and a plurality of valves provided in the middle of each of the gas introduction passages for opening and closing each of the gas introduction passages.

  The present invention has the above-described configuration, and has an effect that it is possible to provide an air levitation belt conveyor device that can reduce the recovery work after the occurrence of a fire.

FIG. 1 is a schematic side view showing an example of an air levitation belt conveyor device according to the first embodiment. 2A is a schematic view of a partition device and the like provided in the forward belt guide portion of the air-floating belt conveyor device of FIG. 1 as viewed from the front, and FIG. 2B is a diagram of the partition device and the like. It is the schematic diagram which looked at from the side. FIG. 3 is a view showing a modification of the partition plate used in the partition device. FIG. 4 is a schematic side view showing an example of an air levitation belt conveyor device according to the second embodiment. FIG. 5 is a perspective view showing an example of the first and second belt reversing mechanisms of the air-floating belt conveyor device according to the first and second embodiments.

  Hereinafter, preferred embodiments will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout the drawings, and redundant description thereof may be omitted. In addition, the drawings schematically show the respective components, and the shape and dimensional ratio may not be accurately displayed. Further, the present invention is not limited to the following embodiment.

(First embodiment)
FIG. 1 is a schematic side view showing an example of an air levitation belt conveyor device according to the first embodiment. 2A is a schematic view of a partition device and the like provided in the forward belt guide portion of the air-floating belt conveyor device of FIG. 1 as viewed from the front, and FIG. 2B is a diagram of the partition device and the like. It is the schematic diagram which looked at from the side.

  In this air levitation belt conveyor apparatus, an endless conveyor belt 1 is wound between a drive pulley 2 that is a head pulley and a driven pulley 3 that is a tail pulley, and the drive pulley 2 is moved by an arrow by a motor (not shown). It is configured to be rotationally driven in the R direction. Here, a conveyor main body Cm is configured by the conveyor belt 1, the driving pulley 2, the driven pulley 3, and a motor (not shown) that rotationally drives the driving pulley 2.

  Between the driving pulley 2 and the driven pulley 3, an outward belt guide part 4 (hereinafter referred to as “outward side guide part 4”) that is a cylinder into which the outward part 1 a of the conveyor belt 1 is inserted; A return-side belt guide portion 5 (hereinafter referred to as “return-side guide portion 5”), which is a cylindrical body into which the return-side portion 1b is inserted, is disposed.

  In addition, first and second belt reversing mechanism portions 100A and 100B for reversing the belt by 180 degrees are provided between both end portions of the return path side guide portion 5 and the drive pulley 2 and the driven pulley 3. FIG. 5 is a perspective view showing an example of the first and second belt reversing mechanisms 100A and 100B. As shown in FIG. 5, the first belt reversing mechanism unit 100 </ b> A includes the conveyor belt 1 in which the dirty surface (the surface on which the object is placed) faces downward in the upstream portion in the moving direction of the return path side portion 1 b of the conveyor belt 1. Is reversed so that the dirty surface faces upward. The second belt reversing mechanism unit 100B is configured to invert the conveyor belt 1 with the dirt surface facing upward in the downstream portion in the moving direction of the return path side portion 1b of the conveyor belt 1 to the dirt surface facing downward. Since the first and second belt reversing mechanism units 100A and 100B have the same configuration, the first belt reversing mechanism unit 100A will be described as an example.

  The first belt reversing mechanism section 100A is disposed between the two pinch rollers 50 and 51 which are arranged apart from each other in the moving direction of the conveyor belt 1 and support the upper and lower surfaces of the conveyor belt 1, and between these pinch rollers 50 and 51. Two sets of guide rollers that guide the conveyor belt 1 in a cylindrical shape from the outside that is turned 180 degrees and is twisted so that the center portion of the span between the pinch rollers 50 and 51 has a cylindrical shape with an open section with the dirty surface inside. And a mechanism 52.

  The twisting direction of the conveyor belt 1 between the pinch rollers 50 and 51 is clockwise from the upstream side toward the downstream side in the first belt reversing mechanism unit 100A, and upstream in the second belt reversing mechanism unit 100B. The counterclockwise direction is from the side toward the downstream direction. The upstream pinch roller 50 is composed of two rollers 50a and 50b, and the downstream pinch roller 51 is composed of two rollers 51a and 51b.

  The conveyor belt 1 is formed of a flexible material so as to be twisted so as to have the above-described cylindrical shape or to travel in a curved shape along the inner bottom surfaces of the forward and backward path side guide portions 4 and 5. .

  For example, as shown in FIG. 2 (A), the forward path side guide portion 4 includes a lower trough portion 8a, side plate portions 8b on both sides, and an upper lid portion 8c. The trough portion 8a and the side plate portions 8b on both sides are provided. The side plate portions 8b and the lid portions 8c on both sides are fixed so as to be in close contact with each other. As for this outward path side guide part 4, the side plate part 8b of both sides is being fixed to the some support | pillar (not shown) arrange | positioned on both sides.

  The trough portion 8a has a concave curved surface portion whose cross section is, for example, an arc shape, and air supply holes 9 made of, for example, round holes at a predetermined pitch in the longitudinal direction are provided at the bottom of the trough portion 8a.

  A plurality of air supply paths 6 are provided directly below the trough portion 8a along the longitudinal direction thereof. Both ends of each air supply path 6 are partitioned by a partition wall 6d. Although not shown in FIG. 2 (A), the partition wall 6d has a position corresponding to both ends in the longitudinal direction of the forward path side guide portion 4 and a position corresponding to a position directly below partition devices D2, D3, and D4 described later. Is provided.

  The return path side guide part 5 has the same configuration as the forward path side guide part 4 except that the upper cover part 8c is formed in a flat plate shape. In addition, a plurality of air supply paths 7 are provided just below the return path side guide portion 5 in the same manner as the air supply path 6.

  The forward path side portion 1a and the backward path side portion 1b of the conveyor belt 1 are moved to the inner bottom portions of the forward path side and the backward path side guide portions 4 and 5 by the air supplied from the air supply holes 9 via the air supply paths 6 and 7, respectively. It floats from (trough part 8a).

  Further, one ends of branch pipes 12 and 13 are connected to the air supply paths 6 and 7, and the other ends of the branch pipes 12 and 13 are connected to the main pipe 11. In addition, electric valves V1 and V2 for adjusting the flow rate are connected in the middle of the branch pipes 12 and 13, respectively. A blower 10 is connected to the upstream side of the main pipe 11. An inert gas tank 23 storing an inert gas (for example, nitrogen) is installed in the vicinity of the blower 10. Air can be supplied to the blower 10 via the electric valve 21 and the electric valve 22. The inert gas can be supplied from the inert gas tank 23 via the.

  The air supply means SA that supplies air to the air supply hole 9 of the forward path side guide 4 includes a blower 10, a main pipe 11, a branch pipe 12, an electric valve V1, and an air supply path 6. Here, the air supply path 6 and the branch pipe 12 connected thereto constitute an air introduction path. The inert gas supply means SG1 includes an inert gas tank 23 and switching means constituted by the electric valves 21 and 22.

  In addition, a supply port 18 through which an object to be conveyed is supplied is provided at a portion near the forward path side guide portion 4 at the top of the cover 19. Here, the object to be transported is a combustible material such as coal.

  Further, a cover 19 that covers the conveyor belt 1 and the driven pulley 3 is provided on the driven pulley 3 side from the forward and backward guide portions 4 and 5, and the drive pulley 2 side from the forward and backward guide portions 4 and 5. Is provided with a cover and chute 20 that covers the conveyor belt 1 and the drive pulley 2 and that has a discharge port 20a for a conveyed object at the lower end. A dust collecting fan 17 is connected to the upper part of the cover / chute 20 via a bag filter 16.

  Moreover, the optical fiber temperature sensor 15 which has the optical fiber 15a installed in the inside of the outward path side guide part 4 over the full length direction is provided. The optical fiber temperature sensor 15 detects the internal temperature at a predetermined position of the forward guide 4 and outputs the detected temperature and the detected position to the controller 30. The optical fiber temperature sensor 15 is a known sensor that can detect the temperature at intervals of 1 m, for example.

  In addition, the outward guide unit 4 is provided with partition devices D1 to D5 at a predetermined interval. For example, as shown in FIGS. 2 (A) and 2 (B), each of the partition devices D1 to D5 includes a metal partition plate 31, a hydraulic cylinder 32, a guide portion 33 of the partition plate 31, and a lid portion 8c. And a fixed cover 34. A hole 31 a is provided in the upper part of the partition plate 31, and a pin 32 a attached to the tip of the cylinder rod of the hydraulic cylinder 32 is inserted into the hole 31 a to support the partition plate 31. The hydraulic cylinder 32 is fixed inside the cover 34 by appropriate fixing means, and is normally maintained in a state where the cylinder rod is extended and supports the partition plate 31.

  When the hydraulic cylinder 32 is operated to contract the cylinder rod, the pin 32a at the tip of the cylinder rod comes out of the hole 31a of the partition plate 31, and the partition plate 31 falls along the guide portion 33 by its own weight. Thereby, the inside of the outward path side guide part 4 is divided by the partition plate 31 into the area | region of the both sides. At this time, a slight gap may be formed between the partition plate 31, the conveyor belt 1, and the trough portion 8 a by sandwiching the object to be conveyed F.

  Further, a guide portion 35 for guiding the falling partition plate 31 and shielding the gas flow between the regions on both sides partitioned by the partition plate 31 is provided inside the forward path side guide portion 4. Such a guide part 35 does not exist in the return path side guide part 5.

  Moreover, this air floating type belt conveyor apparatus is provided with the controller 30 which controls operation | movement of this whole apparatus. Therefore, the controller 30 operates the conveyor main body Cm (the operation of the motor that rotationally drives the drive pulley 2), the operations of the blower 10 and the dust collecting fan 17, the operations of the electric valves 21, 22, V1, V2, and the partition device. The operation of D1 to D5 is controlled. The controller 30 can be configured by, for example, a microcontroller, MPU, PLC (Programmable Logic Controller), or the like. Further, the controller 30 may be configured by a single controller that performs centralized control, or may be configured by a plurality of controllers that perform distributed control in cooperation with each other.

  An example of the operation of the air levitation belt conveyor device will be described.

  First, during normal operation, the electric valve 21 is open and the electric valve 22 is closed. Further, all the electric valves V1, V2 are in an open state after the flow rate is adjusted. And the blower 10 and the dust collecting fan 17 are driven, the motor of the conveyor main body Cm is driven, and the drive pulley 2 is rotated in the arrow R direction.

  In this case, air is supplied from the blower 10 through the main pipe 11 and the branch pipes 12 and 13 to the air supply paths 6 and 7 provided in the lower portions of the forward and backward guide portions 4 and 5. The air supplied to the air supply paths 6 and 7 is supplied between the lower surface of the conveyor belt 1 (1a, 1b) and the trough part 8a from the air supply holes 9 of the forward path and return path side guide parts 4 and 5. The conveyor belt 1 (1a, 1b) is levitated. Further, the conveyor belt 1 circulates between the driving pulley 2 and the driven pulley 3 by the rotation of the driving pulley 2, conveys the object to be conveyed supplied from the supply port 18 to the driving pulley 2, and discharges it from the discharge port 20a. To do.

  For example, when the conveyed object is ignited by spontaneous ignition or the like, the vicinity of the ignited conveyed object becomes high temperature. The temperature of the forward path guide unit 4 to which the object is conveyed is always detected by the optical fiber temperature sensor 15, and the detected temperature and the detection position are input to the controller 30. The controller 30 determines that a fire has occurred when the detected temperature is equal to or higher than a predetermined temperature, and determines in which section planned areas A1 to A4 the fire has occurred from the detection position.

  In addition, each division plan area | region A1-A4 shows the area | region inside the outward route side guide part 4, and the controller 30 is beforehand provided with the range of each division planned area | region A1-A4 (for example, in the longitudinal direction of the outward path side guide part 4). (Positions at both ends of each scheduled partition area A1 to A4) are set.

  For example, when a fire has occurred in the scheduled section area A1, the controller 30 stops the conveying operation of the conveyor body Cm (stops the motor) and stops the blower 10 and the dust collecting fan 17 from being driven. The electric valve V1 provided in the branch pipe 12 connected to the air supply path 6 immediately below the planned area A1 is fully opened, and all the electric valves V1, V2 other than the electric valve V1 and the electric valve for supplying air are used. 21 is closed. Then, the hydraulic cylinders 32 of the partition devices D1 and D2 arranged at both ends of the planned partition area A1 are operated so that both ends of the planned partition area A1 are partitioned by the partition plates 31, and then an electric valve for supplying inert gas. 22 is opened and the blower 10 is driven. As a result, the inert gas stored in the inert gas tank 23 is supplied to the air supply path 6 immediately below the planned partition area A1, and further supplied from the air supply hole 9 into the planned partition area A1. Thereby, the fire which generate | occur | produced in division division area | region A1 can be extinguished.

  If the controller 30 determines that a fire has occurred in the area below the supply port 18, the controller 30 waits for the fired object to be conveyed into the section planned area A <b> 1, and It is sufficient to perform the control. In other words, the controller 30 may detect the occurrence of a fire only in the planned division areas A1 to A4.

  Moreover, since the partition wall 6d of the air supply path 6 is provided directly below or substantially immediately below the partition devices D1 to D5, a fire occurs when a fire occurs in any of the planned partition areas A1 to A4. By partitioning both ends of the scheduled partition area with the partition plate 31, the amount of inert gas leaking to other areas is small.

  In this example, the bowl-shaped member is partitioned by the partition wall 6d to form each air supply path 6. However, each air supply path 6 is individually configured by a completely separated member. May be. That is, each air supply path 6 may be configured by providing walls such as a partition wall 6d at both ends of a U-shaped member. The same applies to the air supply path 7 on the return path side.

  As described above, in this embodiment, it is possible to extinguish the fire by dividing the both ends of the planned partition area where the fire has occurred with the partition plate 31 and supplying the inert gas to the area. Thus, by extinguishing with the inert gas, the outward guide unit 4 or the like is not submerged, so that it can be restored only by exchanging and repairing the damaged part, and the restoration work can be reduced.

  In the present embodiment, as shown in FIG. 2A, the shape of the partition plate 31 used in the partition devices D1 to D5 is such that the lower edge thereof is along the surface of the trough portion 8a. However, in consideration of the existence of the object F to be transported on the trough portion 8a, for example, a shape having no portion below the two-dot chain line Lx may be used. Moreover, you may use the partition plate 36 as shown in FIG. FIG. 3 is a view showing a modification of the partition plate used in the partition devices D1 to D5. The partition plate 36 is obtained by combining a metal plate 37 with a heating rod 38 formed of a flame-retardant rubber sheet. As described above, the partition plate may be variously changed in shape and material.

  Moreover, the action | operation mechanism of the partition plate 31 of the partition apparatuses D1-D5 is not restricted to the structure shown to FIG. 2 (A) and (B). For example, the partition plate 31 may be pushed down or pulled up with a hydraulic cylinder or the like.

  In short, it suffices if the partition devices D1 to D5 can partition both ends of each of the planned scheduled areas A1 to A4. In addition, the number of division area (A1-A4) is not restricted to four pieces.

(Second Embodiment)
FIG. 4 is a schematic side view showing an example of an air levitation belt conveyor device according to the second embodiment.

  Unlike the first embodiment, the second embodiment is different from the first embodiment in that the inert gas supply path is provided separately from the normal air supply path. is there.

  That is, a blower 24 connected to the inert gas tank 23 via the electric valve 22 is separately provided, the main pipe 25 is connected to the blower 24, and the planned divided areas A1 to A4 (see FIG. 1) is connected to each other by a branch pipe (gas introduction path) 26, and an electric valve V21 is connected in the middle of each branch pipe 26. Here, in each of the scheduled sections A1 to A4, for example, a hole is provided in the side plate portion 8b or the lid portion 8c, and a branch pipe 26 is connected to the hole. The blower 24, the electric valve 22, and V21 are also controlled by the controller 30.

  The inert gas supply means SG2 here includes an inert gas tank 23, an electric valve 22, a blower 24, a main pipe 25, a branch pipe 26, and an electric valve V21.

  An example of the operation of the air levitation belt conveyor device will be described. This operation is controlled by the controller 30.

  First, during normal operation, the electric valve 22 and all the electric valves V21 in the inert gas supply path are closed, and the blower 24 is in a drive stop state. As in the case of the first embodiment, all of the electric valves V1, V2 are in an open state after the flow rate is adjusted. And the blower 10 and the dust collecting fan 17 are driven, the motor of the conveyor main body Cm is driven, and the drive pulley 2 is rotated in the arrow R direction.

  For example, if the controller 30 determines that a fire has occurred, for example, in the planned section area A1, based on the detection information (detection temperature and detection position) from the optical fiber temperature sensor 15, the controller 30 Then, the conveying operation of the conveyor body Cm is stopped (the motor is stopped), and the drive of the blower 10 and the dust collecting fan 17 is stopped, and all the electric valves V1, V2 are closed. Then, the hydraulic cylinders 32 of the partition devices D1 and D2 arranged at both ends of the planned partition area A1 are operated so that both ends of the planned partition area A1 are partitioned by the partition plates 31, and then an electric valve for supplying inert gas. 22 and the electric valve V21 provided in the branch pipe 26 connected to the planned partition area A1 where the fire has occurred are opened, and the blower 24 is driven. Thereby, the inert gas stored in the inert gas tank 23 is supplied into the planned division area A1, and the fire generated in the planned division area A1 can be extinguished.

  Also in this embodiment, as in the case of the first embodiment, by extinguishing with an inert gas, the forward path side guide unit 4 and the like are not submerged, so that it can be recovered only by repairing the damaged part. , Can reduce the recovery work.

  In the first embodiment described above, since the air supply path is also used as the inert gas supply path, the cost can be reduced compared to the case of the second embodiment.

  As described in the first embodiment, the partition devices D1 to D5 can change the shape and material of the partition plate 31, the operation mechanism, and the like.

  Moreover, in said 1st, 2nd embodiment, although the optical fiber temperature sensor 15 was used as a temperature detection means, it is not restricted to this, What is necessary is just to be able to measure the temperature of each division division area A1-A4, for example, One or a plurality of temperature sensors using thermocouples or resistance temperature detectors may be installed in each of the scheduled areas A1 to A4.

  Further, in the first and second embodiments described above, the planned partition area in which a fire has occurred to an operator, such as a display device that displays the planned partition area in which the controller 30 has determined that a fire has occurred. An informing means for informing may be provided. Then, all or any of the electric valves (21, 22, V1, V2, V21) may be replaced with a manual valve, and the operator manually opens and closes when a fire is notified by the notification means. May be. Alternatively, an electric valve operating means connected to the controller 30 may be provided, and the electric valve may be controlled by an operator operating the operating means. Further, an operation unit for the partition devices D1 to D5 connected to the controller 30 may be provided, and the partition devices D1 to D5 may be operated by operating the operation unit by an operator.

  INDUSTRIAL APPLICATION This invention is useful as an air floating type belt conveyor apparatus etc. which can reduce the restoration operation | work after a fire outbreak.

Cm Conveyor bodies A1 to A4 Scheduled areas D1 to D5 Partition device SA Air supply means SG1 and SG2 Inert gas supply means 1 Conveyor belt 1a Conveyor belt forward path side 1b Conveyor belt return path side part 4 Forward path belt guide 5 Return side belt guides 6, 7 Air supply path 9 Air supply holes 10, 24 Blower 11, 25 Main piping 12, 13, 26 Branch piping 15 Optical fiber temperature sensors 21, 22, V1, V2, V21 Motorized valve 23 Inactive Gas tank 30 controller

Claims (4)

A conveyor main body having an endless conveyor belt, carrying a transported object on the conveyor belt, and transporting it in a predetermined direction;
A cylinder body into which a forward path portion on which the conveyed object of the conveyor belt is placed is inserted, and air is supplied to the bottom portion of the cylindrical body between the forward path portion and the inner bottom portion of the cylindrical body; A forward belt guide portion provided with a plurality of air supply holes;
Air supply means for supplying air to the air supply hole;
A plurality of partitioning areas adjacent to each other in the longitudinal direction inside the cylindrical body are determined in advance, and a plurality of partition devices for partitioning the partitioning planned area from a state where the partitioning planned area is not partitioned,
An inert gas supply means for supplying an inert gas to each of the planned partition regions;
An air levitation type belt conveyor device. A temperature detecting means for detecting the temperature of each of the planned sections;
When the temperature detected by the temperature detection means in the planned section area is equal to or higher than a predetermined temperature, the conveyor body stops its conveying operation, the air supply means stops supplying air, and the partition device Partitioning the planned partition area where the detected temperature is equal to or higher than a predetermined temperature, and the inert gas supply means is configured to supply an inert gas to the planned partition area where the detected temperature is equal to or higher than a predetermined temperature;
The air levitation type belt conveyor device according to claim 1. The air supply means includes
A blower that draws in air and delivers it,
A plurality of air introduction passages for guiding the air delivered from the blower to the air supply holes in each of the planned sections;
A plurality of valves that are provided in the middle of each of the air introduction paths and open and close each of the air introduction paths;
The inert gas supply means includes
A gas tank storing an inert gas;
Switching means for supplying an inert gas in the gas tank instead of air to the blower,
The air levitation type belt conveyor device according to claim 2. The inert gas supply means includes
A gas tank storing an inert gas;
A blower that sucks and delivers the inert gas in the gas tank;
A plurality of gas introduction passages for guiding the inert gas delivered from the blower to each of the scheduled areas;
A plurality of valves provided in the middle of each gas introduction path and opening and closing each gas introduction path;
The air levitation type belt conveyor device according to claim 2.

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