JP5561945B2 - Pneumatic transport system - Google Patents

Description

  The present invention relates to a pneumatic transport system that mixes a transported object with a transport gas and transports the transported object to a predetermined position.

  Conventionally, when transporting objects to be transported to a predetermined location such as storage tanks, etc., such as metal sewage, cereals, sludge, sand, powder, or metal scrap generated when processing metal products in factories, etc., 2. Description of the Related Art Pneumatic transport systems that transport a mixed object in a gas such as air that is sucked are widely used (see, for example, Patent Document 1). The pneumatic transport system of Patent Document 1 includes a transport pipe for transporting a transported object, a transported object supply device that supplies the transported object into the transport pipe, and a gas flow providing device that provides a gas flow in the transport pipe. And can be transported without scattering the transported object to the outside during transportation.

JP 2000-085968 A

  By the way, when transporting the metal scrap generated by the processing of the metal product as a transported object, the transport is performed in a state where the liquid (oil water) used at the time of processing the metal product is attached. Since such metal scraps are difficult to dispose and reuse unless the liquid is separated, conventionally, a separation device such as a dryer or a centrifuge is arranged in the pneumatic transportation system, and the metal scrap and liquid are separated by the separation device. Need to be separated. For example, in the pneumatic transportation system of Patent Document 1, a separation device is arranged upstream of the transported object supply device, and the transported object and the liquid are separated at a stage before transporting. Such separation of the transported object and the liquid is not limited to transporting metal scrap as the transported object, and is also required when transporting transported objects containing moisture such as food. Is.

  However, in liquid separation devices such as dryers and centrifuges, the amount of treatment that can be processed in one separation process is determined for each device, and a certain amount of time is required for one separation process. For this reason, it was impossible to continuously process a large amount of transported objects. Therefore, when such a separation device is incorporated into an air transportation system, the flow of the object to be transported stagnate upstream of the separation device, and the transportation efficiency of the entire air transportation system is reduced in accordance with the processing efficiency of the separation device. There was a problem to do. In other words, the processing efficiency of the separation device is significantly lower than the transport efficiency of the transported object transported in the transport pipe.

  The present invention has been made in view of such conventional circumstances, and the object thereof is to reduce the transportation efficiency of the entire pneumatic transportation system while being configured to separate the transported object and the liquid during the transportation. It is an object of the present invention to provide a pneumatic transportation system capable of suppressing the above.

In order to achieve the above object, the pneumatic transportation system according to claim 1 is an pneumatic transportation system for transporting a transported object to a transported object storage device, wherein the transported object is mixed with a transport gas. A transport pipe for transporting the transported object, a transported object supply device that supplies the transported object into the transport pipe, a separation device that separates a liquid contained in the transport gas mixed with the transported object, A dust collector for separating the transported gas mixed with the transported material separated by the separation device into the transported material and the transported gas, and a gas flow for transporting the transported material. wherein the gas flow apparatus for providing a transport pipe, comprising said and be transported substance reservoir unit for storing the object to be transported object separated in the dust collector, the separation device, leading to the dust collector transport together provided in the middle, in the dust collector It is externally integral with a casing, disposed in the casing, and a separation passage to form a flow path of the transport gas in the inner band, said the separation passage, outwardly from the inside A passage portion that allows the liquid to pass through and a corner portion that changes the transport direction of the transport gas are provided.

  According to the present invention, the corner portion is provided in the separation passage formed in the separation device. Further, the separation passage is provided with a passage portion that allows the liquid to pass from the inside to the outside. Therefore, the object to be transported and the liquid transported from the transport pipe to the separation device collide with the wall surface of the separation passage at the corner. At this time, the liquid that can pass through the passage is discharged out of the separation passage, and the transported object that cannot pass through the passage remains in the separation passage and is transported downstream. In this way, the transported object and the liquid can be separated in the separation passage. According to the configuration of the separation device of the present invention, since the transported object and the liquid can be separated only by passing through the separation passage, it is not necessary to stop the flow of the transported object in the separation device. Separation from the liquid can be performed continuously. Therefore, the processing efficiency of the separation device is substantially the same as the transport efficiency of the transported object transported in the transport pipe, and a decrease in the transport efficiency of the entire pneumatic transport system can be suppressed.

  Further, the separation device is integrally attached to the dust collecting device disposed on the downstream side thereof. Therefore, the enlargement of the whole pneumatic transportation system accompanying the installation of the separation device can be suppressed, and the installation area can be reduced. Note that the term “externally attached” means that the casing of the separator and the dust collector are connected without a transport pipe, and the separation passage formed in the casing and the inside of the dust collector are connected. It means a state of direct communication.

  The pneumatic transportation system according to claim 2 is the pneumatic transportation system according to claim 1, wherein the separation passage includes an upstream opening through which the transportation gas flows from the transportation pipe into the separation passage, and the separation. A downstream opening is provided for discharging the transport gas from the passage to the dust collector, and the downstream opening is formed to have a larger opening area than the upstream opening. Is characterized in that a discharge assisting means for assisting the discharge of the object to be transported from the separation passage to the dust collector is provided.

  According to the present invention, since the opening area of the downstream opening is larger than the opening area of the upstream opening, even when a large-sized transported object is transported, the transported object is placed in the separation passage. Can be easily discharged to the dust collector side. In addition, by increasing the opening area of the downstream opening, the flow velocity of the gas flow toward the downstream opening and the dust collector side in the separation passage decreases, and the transported from the separation passage to the dust collector side Although there is a possibility that the discharge efficiency of the object may be lowered, in the present invention, the discharge efficiency is prevented from being lowered by providing discharge auxiliary means.

The pneumatic transportation system according to claim 3 is a transportation pipe for transporting a transportation object mixed with a transportation gas, a transportation object supply device for supplying the transportation object into the transportation pipe, and the transportation object. A dust collector that separates the transported gas mixed into the transported object and the transported gas, a gas flow providing device that provides a gas flow for transporting the transported object into the transport pipe, and the transported object. In a pneumatic transportation system including a transported material storage device that stores transported material, a separation device that separates the transported material and liquid contained in the transported gas in the middle of transporting to the dust collecting device. The separation device is integrally attached to the dust device, and the separation device includes a casing and a separation passage that is disposed in the casing and forms a flow path for the transport gas in an inner region. In the passage, the liquid from the inside to the outside Passage portions which allow the passage of, and the corner portion to change the transport direction of the transport gas are provided, wherein the transport pipe is connected to the separation device through said dust collecting device, in the separation device, the A partition that separates the inside of the separation passage and the inside of the dust collector is provided around the downstream end of the transport pipe.

  According to this invention, it arrange | positions so that a part of transport pipe located in the upstream of a separation apparatus may penetrate the inside of a dust collector. By arranging a part of the transport pipe and the dust collector in an overlapping manner, the installation area of the entire pneumatic transport system can be further reduced.

  By the way, when the transport pipe is configured to be connected to the separation device from the dust collector side as described above, the upstream region in the separation passage, that is, the periphery of the downstream end portion (upstream opening portion) of the transport pipe. In the region, a gas flow that flows from the separation passage to the dust collector side may occur. And there exists a possibility that the liquid which splashed in the channel | path for a separation may flow into the dust collector side in this gas flow. However, in the present invention, since the partition that separates the inside of the separation passage and the inside of the dust collector is provided around the upstream opening, the separation passage in the region upstream of the separation passage is directed to the dust collector side. The generation of flowing gas flow is prevented. Therefore, it is possible to prevent the liquid scattered in the separation passage from flowing into the dust collector side through the peripheral region of the upstream opening.

  According to the pneumatic transportation system of the present invention, it is possible to suppress a decrease in the transportation efficiency of the entire pneumatic transportation system while configuring the article to be transported and the liquid to be separated during the transportation.

Sectional drawing of the separation apparatus and dust collector of 1st Embodiment. The elements on larger scale of the separation apparatus of 1st Embodiment. XX sectional drawing in FIG. Sectional drawing of a liquid storage apparatus. Schematic which shows a pneumatic transport system. Sectional drawing of the separation apparatus and dust collector of 2nd Embodiment. The elements on larger scale of the separation apparatus of 2nd Embodiment. The YY sectional view taken on the line in FIG.

[First Embodiment]
Hereinafter, the pneumatic transportation system of the 1st embodiment which materialized the present invention is explained based on Drawings 1-5. FIG. 5 schematically shows the overall configuration of an air transportation system that transports a transported object mixed with a transport gas. In the present embodiment, metal scrap generated by processing a metal product using the NC lathe 1 will be described as a transported object. Examples of such metal scrap include iron, cast iron, cast steel, and aluminum.

  The pneumatic transportation system of the present embodiment is provided with a bifurcated transportation pipe 2 on the upstream side. A transported object supply device 3 is disposed on the most upstream side of the transport pipe 2. The transported object supply device 3 supplies the metal scrap discharged from the NC lathe 1 into a transport passage formed in the inner area of the transport pipe 2. As such a transported object supply device 3, for example, And rotary feeders disclosed in Japanese Patent Application Laid-Open Nos. 09-240837 and 2000-142975. In the transport pipe 2, a switching valve 4 is provided in the vicinity of each transported object supply device 3. Then, it is selected by opening and closing each switching valve 4 to which of the bifurcated transport pipe 2 the transport gas is supplied.

  A dust collector 5 is provided on the most downstream side of the transport pipe 2 to separate the transport gas mixed with metal scrap into metal scrap and clean air and collect the metal scrap. A transported object storage device 6 for storing the collected metal waste is provided below the dust collector 5. A suction blower 7 as a gas flow providing device is connected to the downstream side of the dust collector 5. The suction blower 7 is a supply source of transport gas and sucks clean air separated by the dust collector 5.

  In the pneumatic transport system of the present embodiment, the metal scrap supplied into the transport pipe 2 by each transported object supply device 3 is sucked by the suction blower 7 to the downstream side of the negative pressure transport pipe 2. Transported. Further, on the upstream side of the dust collector 5 in the transport pipe 2, a separation device 20 is provided for separating the metal waste and the liquid contained in the transport gas. The separation device 20 is integrally attached to the dust collector 5.

Next, the dust collector 5 and the separation device 20 will be described.
As shown in FIGS. 1 and 2, a casing 21 provided in the separation device 20 includes a cylindrical outer cylinder 21a, a pair of disk-shaped first side plates 21b fixed to both ends of the outer cylinder 21a, and The second side plate 21c is formed. A circular through hole 22 whose center is the same as the axis of the outer cylinder 21a is provided at the center of the second side plate 21c.

  A cylindrical inner cylinder 23 having the same central axis as that of the outer cylinder 21a is fixed to the central portion of the inner side surfaces of the first side plate 21b and the second side plate 21c. The inner diameter of the inner cylinder 23 is set to be equal to the diameter of the through hole 22 formed in the second side plate 21c, and the inner peripheral surface of the inner cylinder 23 and the through hole 22 are flush with each other. Yes. As shown in FIGS. 2 and 3, the second side plate 21 c is attached with a partition wall 24 that partially closes the upper part of the through hole 22 (above the center of the through hole 22). The downstream end of the transport pipe 2 is inserted into the partition wall 24.

  Further, an inner wall 25 that bisects the region in the inner cylinder 23 in the axial direction of the inner cylinder 23 is fixed to the inner peripheral surface of the inner cylinder 23. The inner cylinder 23 and the inner wall 25 are made of punching metal and have holes as passage portions that allow passage of liquid in the inner and outer directions. The size of the hole is set to a size that does not allow the metal scrap to pass through and allows the liquid to pass through.

  In the present embodiment, a region located on the second side plate 21 c side among the regions in the inner cylinder 23 partitioned by the inner wall 25 is the separation passage T. The downstream end opening of the transport pipe 2 becomes the upstream opening 26 of the separation passage T, and the opening portion of the through hole 22 provided in the second side plate 21c is not blocked by the partition wall 24. It becomes the downstream opening 27 of T.

  As shown in FIGS. 2 and 3, three air supply pipes extending in the axial direction of the inner cylinder 23 along the inner cylinder 23 are provided in the region between the outer cylinder 21 a and the inner cylinder 23 in the casing 21. 28 are arranged so as to be positioned on the left and right sides and the upper side of the inner cylinder 23. The air supply pipe 28 is provided with an air injection port 28 a that opens toward the central axis of the inner cylinder 23. The air supply pipe 28 is connected to the compressed air supply device A and a control device (not shown) outside the casing 21. The air supply pipe 28 injects the compressed air supplied from the compressed air supply device A toward the inner cylinder 23 from the air injection port 28a. In the present embodiment, the air supply pipe 28, the compressed air supply device A, and the control device constitute clogging prevention means for preventing clogging of holes formed in the inner cylinder 23 that constitutes the separation passage T. .

  The control device activates the clogging prevention means when transporting the metal scrap is stopped, and jets compressed air toward the inner cylinder 23. Metal scraps and liquid adhering to the inner cylinder 23 due to the pressure of the compressed air are blown off inward of the inner cylinder 23. Thereby, generation | occurrence | production of the clogging of the hole formed in the inner cylinder 23 accompanying the long-term use of the separation apparatus 20 is suppressed.

  In addition, an air supply connected to a compressed air supply device A and a control device (not shown) is provided at the center lower portion of the region located on the first side plate 21b side among the regions in the inner cylinder 23 partitioned by the inner wall 25. A portion 29 is provided. The air supply unit 29 has an opening facing the inner wall 25 and injects compressed air supplied from the compressed air supply device A toward the inner wall 25 and the downstream opening 27. In the present embodiment, the air supply unit 29, the compressed air supply device A, and the control device constitute discharge assisting means. The control device activates the discharge assisting means when transporting the metal scrap, and intermittently injects compressed air from the air supply unit 29 toward the inner wall 25 and the downstream opening 27 (for example, once every 5 to 12 seconds). Spray.) Due to the pressure of the compressed air, the metal scrap that reaches the lower portion of the separation passage T is blown off toward the downstream opening 27 side. Thereby, discharge of the metal waste from the separation passage T is promoted.

  As shown in FIGS. 2 and 3, an attachment hole 30 is formed in the lower portion of the outer cylinder 21 a, and a square box-shaped liquid receiving portion 31 is attached to the attachment hole 30. A liquid discharge path 32 communicating with a liquid storage device (not shown) is connected to the center of the bottom surface of the liquid receiving unit 31. Further, the bottom surface of the liquid receiving portion 31 is formed in an inclined surface shape that is inclined downward toward the connection portion with the liquid discharge path 32.

  As shown in FIG. 1, a storage part 33 for temporarily storing the liquid discharged from the liquid receiving part 31 is formed in the intermediate part of the liquid discharge path 32. A first opening / closing valve 34 is provided on the upstream side of the storage portion 33 in the liquid discharge path 32, and a second opening / closing valve 35 is provided on the downstream side thereof. The first on-off valve 34 and the second on-off valve 35 are connected to a control device (not shown), and the control device periodically opens and closes the first on-off valve 34 and the second on-off valve 35 when transporting the metal scrap. So that it is controlled. At this time, the control device controls the opening / closing timing of the first opening / closing valve 34 and the second opening / closing valve 35 so that the first opening / closing valve 34 and the second opening / closing valve 35 are not simultaneously opened. That is, when one of the first on-off valve 34 and the second on-off valve 35 is in an open state, the other is controlled to be in a closed state.

  As shown in FIG. 1, the separation device 20 is externally attached to the outside of the dust collecting device 5 and is formed integrally with the dust collecting device 5. Specifically, the second side plate 21c of the casing 21 of the separation device 20 and the side surface of the casing 51 constituting the dust collecting device 5 are fixed in contact with each other.

  In the pneumatic transportation system of the present embodiment, the liquid separated by the separation device 20 is stored in the liquid storage device 40. As shown in FIG. 4, the liquid storage device 40 includes a square box-like case 41 that opens upward. A caster 41 a is provided on the bottom surface of the case 41, and a cock 41 b for discharging the liquid stored in the case 41 is provided on one side surface of the case 41. In addition, a transport pipe 41c and a transport pump 41d for transporting the liquid stored in the case 41 to a predetermined position are attached to the case 41. Further, the inner bottom surface of the case 41 is formed in an inclined surface shape that is inclined downward toward the cock 41b.

  A filter 42 having a truncated cone shape with a diameter decreasing downward is attached to the opening of the case 41 so as to close the opening. The filter 42 is formed of punching metal and has a hole as a passage portion that allows passage of liquid in and out. A filter cloth 43 is lined on the inner peripheral surface of the filter 42.

  A lid plate 44 connected to the end of the liquid discharge path 32 is attached to the upper portion of the case 41 with the filter 42 interposed therebetween, and the inside of the case 41 is closed by the lid plate 44. A biaxial feeder type on-off valve 45 extending toward the filter 42 is attached to the center of the lid plate 44. The open / close valve 45 is disposed inside the outer cylindrical portion 46 with a bottomed cylindrical outer tube 46 fixed to the cover plate 44, and is capable of relative rotation while being in sliding contact with the outer cylindrical portion 46. It is comprised from the inner cylinder part 47 and the actuator 48 which rotationally drives the inner cylinder part 47. FIG.

  A communication hole 46 a is formed in the central portion of the outer cylinder portion 46, and the communication hole 46 a is connected to a communication passage 49 that communicates with the dust collector 5. In addition, a pair of openings 46 b facing each other are formed in the lower portion of the outer cylinder portion 46. Similarly, a communication hole 47 a is formed at a position corresponding to the axial direction with respect to the communication hole 46 a of the outer cylinder portion 46 at the center of the inner cylinder portion 47. In addition, a pair of openings 47 b facing each other are formed in the lower portion of the inner cylinder portion 47 at positions corresponding to the openings 46 b of the outer cylinder portion 46 in the axial direction.

  When the inner cylinder 47 is rotated by the actuator 48, the communication hole 46a of the outer cylinder 46 and the communication hole 47a of the inner cylinder 47 overlap, and at the same time, the opening 46b of the outer cylinder 46 and the inner cylinder 47 The opening 47b overlaps, and the on-off valve 45 is in an open state (the on-off valve 45 shown in FIG. 5 is in a closed state). When the on-off valve 45 is opened, the inside of the case 41 and the dust collector 5 are in communication with each other.

  Next, the dust collector 5 will be described. The casing 51 is formed in a rectangular tube shape extending in the vertical direction. On the bottom surface of the casing 51, a discharge path 52 communicating with the transported object storage device 6 is formed. Further, the bottom surface of the casing 51 is formed in an inclined surface shape that is inclined downward toward the connection portion with the discharge path 52. As shown in FIG. 2, the side plate connected to the separation device 20 in the casing 51 is the same as the through hole 22 at a position corresponding to the through hole 22 formed in the second side plate 21 c of the separation device 20. A shaped opening 53 is formed.

  A plurality of cylindrical filter cloths 54 are suspended from the upper portion of the casing 51. Each filter cloth 54 is connected to the exhaust path 55 at its upper end. The exhaust passage 55 is connected to a suction blower 7 disposed on the downstream side of the dust collector 5, and the transport gas supplied into the casing 51 of the dust collector 5 passes through each filter cloth 54 and the exhaust passage 55. And sucked into the suction blower 7. At this time, the transport gas and the metal scrap are separated by the filter cloth 54, and only clean air from which the metal scrap is separated is exhausted from the dust collector 5. That is, only the transport gas that can pass through the filter cloth 54 passes through the filter cloth 54 and is exhausted to the suction blower 7, and the metal dust that cannot pass through the filter cloth 54 is accumulated in the lower portion of the casing 51. The accumulated metal scrap is sent to the transported object storage device 6 through the discharge path 52.

The transport pipe 2 is inserted through the dust collector 5 so as to penetrate the casing 51, but the inner area and the outer area of the transport pipe 2 are completely separated in the casing 51.
Next, the operation of the pneumatic transportation system of this embodiment will be described.

  First, the suction blower 7 is driven, the inside of the transport pipe 2 is in a negative pressure state, and a gas flow of transport gas is generated in the transport pipe 2. When metal scrap is supplied from the transported object supply devices 3 into the transport pipe 2 in such a state, the metal scrap is transported to the downstream side by transport gas flowing in the transport pipe 2. Then, the metal scrap is discharged from the downstream end opening (upstream opening 26) of the transport pipe 2 into the separation passage T of the separation device 20.

  At this time, the metal scrap discharged into the separation passage T continues to advance straight with its momentum, so that it collides with the upper portion of the inner wall 25 positioned facing the upstream opening 26. At this time, the liquid that can pass through the hole formed in the inner wall 25 is discharged to the outside of the separation passage T and stored in the liquid receiving portion 31. Further, the metal scrap that cannot pass through the hole falls along the inner wall 25 and is discharged from the downstream opening 27 into the dust collector 5 along the gas flow of the transport gas flowing through the separation passage T. . At this time, the discharge assisting unit is activated, and compressed air is intermittently injected from the air supply unit 29 toward the inner wall 25 and the downstream opening 27. Thereby, the metal scrap which reached the lower part of the channel | path T for separation is blown off toward the downstream opening 27 side, and is discharged | emitted.

  Thus, the U-shaped transport gas flow path R as shown in FIG. 2 is formed in the separation passage T of the present embodiment. A corner defined by the upper portion of the inner wall 25 and the inner cylinder 23 in the separation passage T and a portion defined by the lower portion of the inner wall 25 and the inner cylinder 23 change the transport direction of the transport gas by about 90 degrees. Functions as part C.

  In addition, the liquid that has passed through the hole serving as the passage portion of the separation passage T is stored in the liquid receiving portion 31 and discharged to the liquid storage device 40 through the liquid discharge passage 32 (see FIGS. 1 and 3). . Specifically, the liquid stored in the liquid receiving portion 31 passes through the first on-off valve 34 and moves to the storage portion 33 when the first on-off valve 34 is opened. At this time, the second on-off valve 35 is in a closed state. Subsequently, when the first opening / closing valve is closed and the second opening / closing valve 35 is opened, the first opening / closing valve passes through the second opening / closing valve 35 and is discharged to the liquid storage device 40. At this time, the first on-off valve 34 and the second on-off valve 35 are controlled so as not to be opened at the same time, and the amount of air flowing from the liquid discharge passage 32 side into the separation passage T is minimized. It has been.

  By repeatedly opening and closing the first on-off valve 34 and the second on-off valve 35, the liquid stored in the liquid receiving part 31 is continuously discharged during the transport of the metal scrap. The first on-off valve 34 and the second on-off valve 35 are controlled so as to be alternately opened and closed every 5 to 10 seconds, for example. As a result, a decrease in the flow velocity of the transport gas flowing in the separation passage T, which is caused by air flowing into the separation passage T from the liquid discharge passage 32 side, and a liquid discharge failure through the liquid discharge passage 32 are prevented. It can be minimized.

  Then, the liquid is discharged to the liquid storage device 40, filtered by the filter cloth 43 and the filter 42, and stored in the case 41. By this filtration treatment, even when fine metal debris is contained in the liquid separated by the separation device 20, fine metal debris can be removed from the liquid. The metal scrap that cannot pass through the filter cloth 43 and the filter 42 is discharged to the dust collector 5 by opening the on-off valve 45.

  On the other hand, the liquid that has passed through the filter cloth 43 and the filter 42 and is stored in the case 41 is appropriately discarded or recycled. At that time, the liquid can be transported to an arbitrary position by using the transport pipe 41c and the transport pump 41d attached to the case 41.

  Further, the transport gas and metal waste discharged from the separation device 20 to the dust collector 5 are separated into the transport gas and metal waste in the dust collector 5. That is, the transport gas passes through the filter cloth 54, is separated from the metal scrap, becomes clean air, and is discharged to the outside through the exhaust path 55 and the suction blower 7. Since the metal scrap cannot pass through the filter cloth 54, it accumulates in the lower part of the casing 51, and is discharged from the dust collector 5 to the transported object storage device 6 for appropriate disposal or recycling. .

Next, operational effects in the present embodiment will be described below.
(1) In the separation device 20 provided in the present embodiment, the inner cylinder 23 and the inner wall 25 that form the separation passage T are formed by punching metal, so that the liquid passes through the separation passage T from the inside to the outside. A hole is provided as a passage portion that allows the Further, a corner portion C for changing the transport direction of the transport gas is provided in the separation passage T.

  As a result, the metal scrap and liquid transported into the separation device 20 are introduced into the separation passage T and collide with the wall surface (inner wall 25) of the separation passage T at the corner portion C. At this time, the liquid that can pass through the hole as the passage portion provided in the separation passage T is discharged out of the separation passage T, and the metal scrap that cannot pass through the hole remains in the separation passage T. It is discharged to the dust collector 5 along with the gas flow of the transport gas. As described above, according to the configuration of the present embodiment, it is possible to separate the metal scrap and the liquid simply by passing the separation passage T in the separation device 20, and therefore the transport flow in the separation device 20. There is no need to stop, and the separation process of the metal scrap and the liquid can be performed continuously. Therefore, even when the separation device 20 is provided in the pneumatic transportation system, it is possible to minimize a decrease in the transportation efficiency of the entire pneumatic transportation system.

  (2) The separation device 20 provided in the present embodiment is integrally attached to the dust collector 5, and the separation passage T of the separation device 20 and the inside of the dust collector 5 are in direct communication. . Thereby, the enlargement of the whole pneumatic transportation system accompanying installation of the separation apparatus 20 can be suppressed, and the installation area can be reduced.

  (3) In the present embodiment, the opening area of the upstream opening 26 of the separation passage T is formed to be equal to the opening area of the transport pipe 2. The downstream opening 27 of the separation passage T is configured such that the opening area thereof is larger than the opening area of the upstream opening 26. As a result, even when metal scrap having a relatively large size has been transported into the separation passage T, such metal waste can be easily discharged from the separation passage T.

  (4) The separation device 20 provided in the present embodiment includes an air supply unit 29, a compressed air supply device A, and a control device as discharge assisting means. And it is comprised so that compressed air may be intermittently injected toward the downstream opening 27 side from the inner wall 25 side at the time of transport of a metal scrap. When the opening area of the downstream opening 27 is configured to be larger than the opening area of the upstream opening 26 and the transport pipe 2, the flow velocity of the transport gas flowing from the upstream opening 26 to the downstream opening 27 in the separation passage T. May decrease and the metal scrap discharge efficiency may decrease. However, according to the configuration of the present embodiment, even when the flow velocity of the transport gas flowing in the separation passage T decreases, the compressed gas injected toward the downstream opening 27 side causes the separation gas from the separation passage T. Since the discharge of the metal scrap is assisted, it is possible to suppress a decrease in the discharge efficiency of the metal scrap in the separation passage T.

  (5) In the present embodiment, a part of the downstream side of the transport pipe 2 is configured to pass through the casing 51 of the dust collector 5 and be connected to the separation device 20. Thus, by arranging a part of the transport pipe 2 and the dust collecting device 5 so as to overlap each other, the installation area of the entire pneumatic transport system can be further reduced.

  (6) In the separation device 20 provided in the present embodiment, a partition that separates the inside of the separation passage T and the inside of the casing 51 of the dust collector 5 around the downstream end of the transport pipe 2 that becomes the upstream opening 26. 24 is provided. When the downstream end of the transport pipe 2 is connected from the casing 51 of the dust collector 5 to the separation device 20 (separation passage T), it is collected from the separation passage T in the upstream region of the separation passage T. A gas flow that flows toward the casing 51 of the dust device 5 may occur. Then, there is a possibility that the liquid scattered in the separation passage T due to this gas flow flows into the casing 51 of the dust collector 5. In the configuration of the present embodiment, by providing the partition wall 24, the liquid splashed in the separation passage T is prevented from flowing into the casing 51 of the dust collector 5 through the vicinity of the upstream opening 26. Yes.

  (7) In the separation device 20 provided in the present embodiment, the storage unit 33 for temporarily storing the liquid in the liquid discharge path 32 formed in the lower part of the liquid receiving unit 31, and the upstream side of the storage unit 33 And a first on-off valve 34 and a second on-off valve 35 disposed on the downstream side. The opening / closing timing of the first opening / closing valve 34 and the second opening / closing valve 35 is controlled so that they are not simultaneously opened. Thereby, the amount of inflow of gas from the liquid discharge passage 32 side into the separation passage T can be minimized, and a decrease in the flow velocity of the transport gas flowing through the separation passage T can be suppressed. In addition, it is possible to suppress a decrease in the liquid discharge efficiency due to the gas flowing into the separation passage T from the liquid discharge path 32 side.

  (8) The separation device 20 provided in the present embodiment includes an air supply pipe 28, a compressed air supply device A, and a control device as clogging prevention means. By jetting the compressed air supplied from the compressed air supply device A toward the inner cylinder 23, metal scraps and liquid adhering to the inner cylinder 23 are blown off inside the inner cylinder 23. Thereby, generation | occurrence | production of the clogging of the hole as a passage part formed in the inner cylinder 23 can be suppressed, and the fall of the separation efficiency in the channel | path T for separation can be suppressed.

[Second Embodiment]
Next, the pneumatic transportation system of the second embodiment will be described based on FIGS. 6 to 8 with a focus on differences from the first embodiment. The pneumatic transportation system of the second embodiment is mainly different from the first embodiment in the configuration of the separation device 60.

  As shown in FIGS. 6 and 7, the casing 61 provided in the separation device 60 includes a cylindrical outer cylinder 61a, a pair of disk-shaped first side plates 61b fixed to both ends of the outer cylinder 61a, and The second side plate 61c is formed. A circular through hole 62 whose center is the same as the axis of the outer cylinder 21a is provided at the center of the second side plate 61c. Moreover, the diameter of the through hole 62 is partially enlarged.

  In addition, a circular through hole (not shown) is formed at the lower center of the first side plate 61b, and an inflow passage 63 is inserted through the through hole. A downstream end portion of the transport pipe 2 is connected to an end portion of the inflow passage 63 located outside the casing 61. The cross-sectional shape of the inflow channel 63 is the same as the cross-sectional shape of the transport pipe 2.

  An end portion of the inflow passage 63 located on the inner side of the casing 61 is connected to a lower end surface of the bottomed cylindrical inner cylinder 64 having an opening on one end side. The inner cylinder 64 has the same inner diameter as the through-hole 62 formed in the second side plate 61c, and is matched with the enlarged diameter part formed in the lower part of the through-hole 62 at the opening side end of the inner cylinder 64. And the enlarged diameter part 64a formed so that the opening may be expanded is provided.

  The end of the inner cylinder 64 on the opening side is fixed to the inner side surface of the second side plate 61c so that the position of the opening corresponds to the through hole 62 formed in the second side plate 61c. The inner peripheral surface on the opening side of the inner cylinder 64 and the through hole 62 are flush with each other. The inner cylinder 64 is formed of punching metal, and has holes as passage portions that allow passage of liquid in the inner and outer directions on the peripheral surface and the bottom surface thereof. The size of the hole is set to a size that does not allow the metal scrap to pass through and allows the liquid to pass through.

  As shown in FIG. 7, a rotating lid 65 that is closed except for a part of the upper portion of the opening is attached to the opening portion of the inner cylinder 64. The rotating lid 65 has a pair of discs 65a and 65b having a substantially semicircular shape with the upper part cut out with respect to a circle having the same diameter as the inner diameter of the inner cylinder 64, and the peripheral edges of both the discs 65a and 65b. And a peripheral wall 65c for connecting the two. The disc 65a and the peripheral wall 65c located on the inner region side of the inner cylinder 64 are each formed of a punching metal and have holes as passage portions that allow the passage of liquid in the inner and outer directions. In addition, about the surrounding wall 65c, the hole as a passage part should just be formed in the lower part at least. Further, no passing portion is provided in the disc 65b.

  As shown in FIGS. 7 and 8, a pair of rotating shafts 66 are fixed to the outer peripheral surface of the peripheral wall 65 c of the rotating lid 65. Both rotating shafts 66 are fixed to the outer peripheral surface of the peripheral wall 65c so as to be positioned on a straight line extending in the radial direction and the horizontal direction of the discs 65a and 65b. The rotation shaft 66 is attached to the end of the inner cylinder 64 on the opening side so as to be rotatable relative to the inner cylinder 64. Therefore, the rotation lid 65 can be rotated relative to the inner cylinder 64 about the rotation shaft 66, and the lower opening portion of the inner cylinder 64 is closed (solid line portion in FIG. 7) and the opened state. It is possible to take at least two states (a broken line portion in FIG. 7). The enlarged diameter portion 64 a of the inner cylinder 64 is provided in order to ensure the rotation trajectory of the rotation lid 65. The thickness of the rotation lid 65 is set to a thickness that allows rotation with respect to the inner cylinder 64. Further, the rotation shaft 66 is connected to an actuator (not shown), and the actuator is configured to open and close the rotation lid 65 by the actuator.

  In the present embodiment, a region surrounded by the inner cylinder 64 and the rotating lid 65 is the separation passage T. A through hole formed in the lower end surface of the inner cylinder 64 and communicating the inflow path 63 and the inner region of the inner cylinder 23 serves as an upstream opening 64b of the separation passage T, and rotates at the opening of the inner cylinder 64. The portion not closed by the lid 65 becomes the downstream opening 64c of the separation passage T. Further, the opening area of the downstream opening is larger than the opening area of the downstream end portion of the inflow path 63 which is the upstream opening.

  A cylindrical intermediate cylinder 67 is fixed to the center of the inner side surfaces of the first side plate 61b and the second side plate 61c so as to surround the inner cylinder 64. The intermediate cylinder 67 is formed of a punching metal, and has a hole as a passage portion that allows the liquid to pass inward and outward in the peripheral surface portion.

  Also in this embodiment, clogging prevention means and discharge assisting means are provided. The clogging prevention means includes an air supply pipe 68, a compressed air supply device A, and a control device. Four air supply pipes 68 are arranged in a region between the outer cylinder 61 a and the intermediate cylinder 67 in the casing 61 so as to be positioned on the left and right sides and the upper and lower sides of the intermediate cylinder 67. Each air supply pipe 68 is provided with an air injection port 68 a that opens toward the central axis of the intermediate cylinder 67. The air supply pipe 68 is connected to the compressed air supply device A and a control device (not shown) outside the casing 61. The air supply pipe 68 injects compressed air supplied from the compressed air supply device A toward the intermediate cylinder 67 from the air injection port 68a.

  The discharge assisting unit includes an air supply unit 69, a compressed air supply device A, and a control device. The air supply unit 69 is provided at the center upper portion of the region between the first side plate 61 b and the end surface of the inner cylinder 64 in the casing 61. The air supply unit 69 has an opening facing the inner cylinder 64, and injects compressed air supplied from the compressed air supply device A toward the inner cylinder 64.

  An attachment hole 70 is formed in the lower part of the outer cylinder 61 a of the casing 61, and a square box-shaped liquid receiving portion 71 is attached to the attachment hole 70. A liquid discharge path 72 is connected to the center of the bottom surface of the liquid receiving part 71. The configurations of the liquid receiving part 71 and the liquid discharge path 72 are the same as those in the first embodiment.

  Moreover, the dust collector 5 of this embodiment is the same structure as the dust collector 5 of 1st Embodiment except the point to which the transport pipe 2 is not penetrated. The opening 53 formed in the casing 51 has the same shape as the through hole 62 formed in the second side plate 61c of the separation device 60.

Next, the operation of the separation device 60 of the pneumatic transportation system of this embodiment will be described.
The metal scrap transported through the transport pipe 2 is introduced into the separation passage T from the inflow path 63 of the separation device 60. Since the metal scrap that has flowed into the separation passage T from the inflow path 63 continues straight ahead with its momentum, it collides with the circular plate 65a of the rotating lid 65 located opposite to the downstream end of the inflow path 63. . At this time, the liquid that can pass through the hole formed in the disk 65 a is discharged to the outside of the separation passage T, passes through the peripheral wall 65 c, the inner cylinder 64, and the intermediate cylinder 67 and is stored in the liquid receiving portion 71.

  Further, the metal scraps that cannot pass through the holes formed in the disc 65a remain in the separation passage T and collect from the downstream opening along the gas flow of the transport gas flowing in the separation passage T. It is discharged into the dust device 5. At this time, the discharge assisting unit is activated, and compressed air is intermittently injected from the air supply unit 69 toward the rotating lid 65 side. Thereby, discharge of the metal scrap remaining in the separation passage T from the separation passage T is promoted. In the present embodiment, the portion defined by the peripheral wall of the inner cylinder 64 and the lower portion of the rotating lid 65 functions as a corner portion C that changes the transport direction of the transport gas from the horizontal direction to the vertical direction by about 90 degrees. To do.

  In the present embodiment, in the corner portion C, the transport direction of the transport gas is changed from the horizontal direction to the vertical direction (upward direction), and the downstream opening 64c is located above the upstream opening 64b. Yes. Therefore, a part of the metal scrap may be accumulated around the corner portion C without being discharged from the downstream opening 64c of the separation passage T. In such a case, as shown by the broken line in FIG. 7, the rotation lid 65 is rotated to open the end portion on the opening side of the inner cylinder 64 to the periphery of the corner portion C. The accumulated metal scrap can be discharged to the dust collector 5.

Also in 2nd Embodiment, the effect of said (1)-(4), (7) and (8) can be obtained. In the second embodiment, the following effects can be obtained.
(9) In the separation device 60 provided in the present embodiment, the rotary lid 65 is a portion that partitions the corner portion C of the separation passage T and that separates the inside of the separation passage T from the dust collecting device 5. Is configured to be rotatable with respect to the inner cylinder 64. Then, the separation passage T and the dust collector 5 are separated from each other by the rotating lid 65 (the state in which the opening of the inner cylinder 64 is closed), and the separation passage T and the dust collection device 5 are entirely separated. A state (a state in which the opening of the inner cylinder 64 is opened) can be taken. Therefore, even when metal debris is accumulated around the corner portion C without part of the metal debris being discharged from the downstream opening 64c of the separation passage T, the rotating lid 65 is rotated, By making the inside of the separation passage T and the dust collector 5 communicate with each other as a whole, the metal debris accumulated around the corner portion C can be removed.

In addition, the said embodiment can also be changed and actualized as follows.
In the transport system of the present embodiment, an air transport system that transports metal scrap as a transported object is employed, but the transported object is not limited to metal scrap. That is, you may employ | adopt the pneumatic transportation system which conveys pulverized bodies, such as glass, a plastics, board | plate material, garbage, vinyl, etc., powder, such as cement and wood powder.

  In the pneumatic transport system of the present embodiment, the transport pipe 2 that is bifurcated is provided on the upstream side, but a configuration in which the transport pipe 2 that is branched into three or more branches may be employed. With such a configuration, various types of metal scraps (for example, iron, cast iron, cast steel, aluminum, etc.) can be transported by type, which is efficient. Moreover, you may employ | adopt the transport pipe 2 which does not have a branch. In this case, the switching valve 4 is omitted.

  -Although the suction blower 7 was employ | adopted as a gas flow provision apparatus in the pneumatic transport system of this embodiment, it is good also as a structure which employ | adopts a supply blower. In this case, the supply blower may be provided on the upstream side of the transported object supply device 3.

  In the pneumatic transportation system according to the first embodiment, the second side plate 21c constituting the casing 21 of the separation device 20 and the side wall of the casing 51 of the dust collection device 5 are contacted and fixed to the dust collection device 5. Although the separation device 20 is externally attached as a single unit, the mounting configuration of both configurations is not limited to this. For example, the second side plate 21c constituting the casing 21 of the separation device 20 and the side wall of the casing 51 of the dust collector 5 may be formed by one wall. That is, the side surface of the casing 51 of the dust collector 5 may also serve as the second side plate 21 c that constitutes the casing 21 of the separation device 20. The same applies to the pneumatic transportation system of the second embodiment.

  In the separation apparatus 20 provided in the pneumatic transportation system of the first embodiment, the corner gas C in the separation passage T is configured to change the transportation direction of the transportation gas by about 90 degrees. However, the degree of change in the transport direction is not limited to 90 degrees, and any angle can be used as long as the metal scrap and liquid transported into the separation passage T can collide with the walls of the separation passage T. Such an angle may be used. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the separation device 20 provided in the pneumatic transportation system of the first embodiment, the downstream opening 27 of the separation passage T is formed to have a larger opening area than the upstream opening 26, but the upstream opening 26 and the opening area of the downstream opening 27 may be set in any manner. For example, the opening area of the upstream opening 26 may be set larger than the opening area of the downstream opening 27, or the opening areas of the upstream opening 26 and the downstream opening 27 may be set to be the same. Further, the shapes of the upstream side opening 26 and the downstream side opening 27 are not particularly limited, and may be any shape. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the separation device 20 provided in the pneumatic transportation system of the first embodiment, the air supply unit 29, the compressed air supply device A, and the control device are provided as the discharge auxiliary means, but the configuration of the discharge auxiliary means is not limited to this. It is not something that can be done. For example, a screw feeder that carries metal scrap toward the downstream opening 27 may be provided in the separation passage T as discharge assisting means. Moreover, it is good also as a structure which is not equipped with the discharge assistance means. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the separation device 20 provided in the pneumatic transportation system of the first embodiment, the discharge assisting means intermittently injects the compressed air during the transportation of the metal scrap, but continuously injects the compressed air. It may be configured. A plurality of air supply units 29 may be provided. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the pneumatic transport system of the first embodiment, the transport pipe 2 passes through the casing 51 of the dust collector 5 and is connected to the separator 20 from the dust collector 5 side. However, the separator 20 and the dust collector However, the arrangement of the transport pipe 2 is not limited to this. For example, the transport pipe 2 may be connected to the separation device 20 in the horizontal direction (lateral direction in FIG. 3) from the outer cylinder 21a side of the separation device 20.

  In the separation device 20 provided in the pneumatic transportation system of the first embodiment, the inner cylinder 23 and the inner wall 25 that form the separation passage T are formed by punching metal, thereby providing a hole as a passage for the separation passage T. However, the configuration of the passing portion is not limited to this. If it is possible to pass only liquid by preventing the passage of metal scraps, for example, the passage part may be provided by forming the inner cylinder 23 and the inner wall 25 with a wire mesh, a resin filter, or the like.

  Further, although the passage portion is provided in the entire separation passage T, the passage portion may be provided only in a part of the separation passage T as long as the passage portion is formed at least at a portion that divides the corner portion C. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the separation device 20 provided in the pneumatic transportation system of the first embodiment, the air supply pipe 28, the compressed air supply device A, and the control device are provided as clogging prevention means. It is not limited to. For example, a vibration generator may be provided as clogging prevention means, and the inner cylinder 23 and the inner wall 25 may be vibrated to shake off metal scraps and liquid adhering to the inner cylinder 23 and the inner wall 25. Moreover, it is good also as a structure which is not provided with the clogging prevention means. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the separation device 20 provided in the pneumatic transportation system of the first embodiment, the three air supply pipes 28 are provided on the left and right and the upper part of the inner cylinder 23, but the number of air supply pipes 28 and the arrangement positions thereof are particularly It is not limited. The air supply pipe 28 is provided with an air injection port 28a that opens toward the central axis of the inner cylinder 23. However, the opening direction of the air injection port 28a is not limited to this, Any opening direction may be used as long as air can be injected to the cylinder 23. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  -The separating device 20 provided in the pneumatic transportation system of the first embodiment may be provided with suction means for sucking air in the casing 21, particularly in the separation passage T. When configured in this way, the passage of liquid from the inner region to the outer region of the separation passage T is promoted. The same applies to the separation device 60 provided in the pneumatic transportation system of the second embodiment.

  In the separation device 60 provided in the pneumatic transportation system of the second embodiment, the rotation lid 65 is provided as a configuration (opening means) for opening the inner region of the separation passage T. However, the configuration of the opening means is not limited to this, and the configuration is such that at least a part of the wall forming the separation passage T is opened, and the metal debris accumulated in the separation passage T can be removed. Any configuration may be used. For example, instead of the rotating lid 65, a slide lid that is slidable in the vertical and horizontal directions may be adopted. The opening means such as the rotating lid 65 may be omitted.

-Although the intermediate | middle cylinder 67 was provided in the separation apparatus 60 provided in the pneumatic transport system of 2nd Embodiment, it is good also as a structure which does not provide this intermediate | middle cylinder 67. FIG.
-As long as the opening part 53 is formed with respect to the casing 51, the dust collector 5 will be whatever the structure for isolate | separating the transport gas provided in the inside of a casing 51, and metal waste. Good.

Next, a technical idea derived from the above embodiment and another example will be described.
The pneumatic transport system is characterized in that the separation passage is provided with an opening means that opens a part of a wall forming the separation passage to open the separation passage.

  A liquid discharge path for discharging the liquid separated by the separation passage is provided for the separation means, and the liquid discharge path is a first open / close valve located upstream of the storage section and the storage section. And a second on-off valve located on the downstream side of the storage section, and the first on-off valve and the second on-off valve are controlled so as to have different opening / closing timings. system.

C ... Corner part, R ... Flow path, T ... Separation passage, 2 ... Transport pipe, 3 ... Transported material supply device, 5 ... Dust collector, 6 ... Transported material storage device, 20, 60 ... Separation device, 21, 61 ... casing, 24 ... partition, 26, 64b ... upstream opening, 27, 64c ... downstream opening.

Claims (3)

A pneumatic transportation system for transporting a transported object to a transported object storage device,
A transport tube for transporting by mixing the object to be transported object to transport gas,
A transported object supply device for supplying the transported object into the transport pipe;
A separation device for separating a liquid contained in the transport gas mixed with the transported object;
A dust collector that separates the transport gas mixed with the transported material , separated from the liquid by the separation device, into the transported material and the transported gas;
A gas flow providing device for providing a gas flow for transporting the transported object in the transport pipe;
With the and be transported substance reservoir unit for storing the object to be transported object separated in the dust collector,
The separation device is provided in the middle of transportation to the dust collecting device, and is integrally attached to the dust collecting device. The separation device is disposed in the casing and in the casing. A separation passage formed in the inner region, and the separation passage is provided with a passage portion that allows passage of liquid from the inside to the outside thereof, and a corner portion that changes the transport direction of the transport gas. Pneumatic transport system characterized by The separation passage is provided with an upstream opening through which the transport gas flows from the transport pipe into the separation passage, and a downstream opening through which the transport gas is discharged from the separation passage into the dust collector. And
The downstream opening is formed so as to have an opening area larger than that of the upstream opening, and the separation device has a discharge for assisting the discharge of the transported object from the separation passage to the dust collector. The pneumatic transportation system according to claim 1, wherein auxiliary means are provided. A transport pipe for transporting the transported object mixed with a transport gas, a transported object supply device for supplying the transported object into the transport pipe, and a transport gas in which the transported object is mixed with the transported object A dust collector that separates the transported gas, a gas flow providing device that provides a gas flow for transporting the transported object in the transport pipe, and a transported object storage device that stores the transported object. In a pneumatic transportation system comprising:
A separation device that separates the transported object and the liquid contained in the transport gas in the middle of the transportation to the dust collector is integrally attached to the dust collector,
The separation device includes a casing and a separation passage that is disposed in the casing and forms a flow path for the transport gas in an inner region. The separation passage has a liquid passage from the inside to the outside thereof. Is provided, and a corner portion for changing the transport direction of the transport gas is provided,
The transport pipe passes through the dust collector and is connected to the separation device. In the separation device, around the downstream end of the transport pipe, the separation pipe and the dust collector are provided. air transport system that is characterized in that partition wall separating the door is provided.

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