JP2011079611A - Cargo handling promoting device for tip nozzle of pneumatic unloader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the cargo handling capacity in a pneumatic unloader, by enhancing the flowability of a cargo handling object. <P>SOLUTION: This cargo handling promoting device 30 for a tip nozzle of a pneumatic unloader 1 handles a cargo of a cargo handling object by sucking the cargo handling object from the tip nozzle 8 by inserting the tip nozzle 8 into the granular cargo handing object. A tip of the tip nozzle 8 is provided with a jet nozzle 31 for jetting the compressed air supplied from a compressed air supply source B for assisting the flow of the cargo handling object. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cargo handling promotion device for a tip nozzle of a pneumatic unloader that loads a cargo handling material by inserting the nozzle into a granular cargo handling material and sucking the cargo handling material from the nozzle.

  As an unloader used when landing granular cargo loaded on a berthed vessel, the tip nozzle is inserted into the cargo handling material and the cargo handling material is unloaded (landed) by sucking the cargo handling material from the tip nozzle. A pneumatic unloader is generally used (see Patent Documents 1 to 3).

  The pneumatic unloader is connected to a separator disposed on the quay side, and extends horizontally, a bend pipe connected to the tip of the horizontal transfer pipe and bent downward, and its bend A vertical conveying pipe connected to the tip of the pipe and extending substantially vertically downward; and a tip nozzle connected to the tip of the vertical conveying pipe and inserted into a cargo handling material loaded on the ship; The cargo handling material is unloaded by sucking the cargo handling material from the tip nozzle.

  Conventionally, the amount of secondary air sucked into the tip nozzle at the tip of the nozzle has been adjusted to improve the cargo handling capability (see Patent Document 3, etc.).

JP 2004-256298 A JP 58-109331 A JP 60-118530 A

  By the way, when a rectangular or column-shaped cargo handling material such as pellets is handled by a pneumatic unloader, the cargo handling capability may be reduced as compared with the case of handling a near-spherical cargo handling material such as soybean or maize. This decrease in cargo handling capacity is caused by the shape of the cargo handling material. The particle shape of the cargo handling material is not uniform, the particles are large, the particles are elongated, the particles are sharp, etc. This occurs when interference (contact, entanglement) occurs and becomes an obstacle to fluidity.

  The problem of reduced cargo handling capability caused by the shape of the cargo handling object cannot be dealt with only by adjusting the secondary air amount of the tip nozzle.

  Therefore, an object of the present invention is to improve the handling ability of the pneumatic unloader by increasing the fluidity of the cargo handling material.

  In order to achieve the above object, the present invention provides a loading promotion device for a tip nozzle of a pneumatic unloader that loads a tip by inserting a tip nozzle into a granular load and sucks the load from the tip nozzle. And the jet nozzle which ejects the compressed air supplied from the compressed air supply source in order to assist the flow of a cargo handling thing is provided in the front-end | tip part of the said front-end | tip nozzle.

  Here, the jet nozzle may be provided so as to be movable in the axial direction of the tip nozzle via an actuator.

  A plurality of the jet nozzles may be provided at a predetermined interval in the circumferential direction of the tip nozzle.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an outstanding effect that the improvement of the cargo handling capability of a pneumatic unloader can be aimed at by improving the fluidity | liquidity of a cargo handling material.

FIG. 1 is a schematic view of a pneumatic unloader provided with a cargo handling promotion device for a tip nozzle according to an embodiment of the present invention. FIG. 2 is a sectional side view of the tip nozzle cargo handling promotion device according to the embodiment of the present invention. FIG. 3 is a developed view of the tip nozzle cargo handling promotion device according to the embodiment of FIG. 2. FIG. 4 is an enlarged view of a main part of the tip nozzle cargo handling promotion device according to the embodiment of FIG. 2. FIG. 5 is a side cross-sectional view of the tip nozzle cargo handling promotion device according to another embodiment. FIG. 6 is a developed view of the tip nozzle cargo handling promotion device according to the embodiment of FIG. 5.

  Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  As shown in FIG. 1, the pneumatic unloader 1 is connected to a separator 3 disposed on the quay 2 side, and is connected to a lateral transport pipe 4 extending in the lateral direction and a tip of the lateral transport pipe 4. The bent pipe 5 bent downward, connected to the tip of the bent pipe 5, connected vertically to the vertical conveying pipe 6 extending vertically downward, and connected to the tip of the vertical conveying pipe 6 and loaded on the ship 7 And a tip nozzle 8 to be inserted into the loaded cargo. In the present embodiment, a flexible hose 9 is interposed between the bend pipe 5 and the vertical conveyance pipe 6, and a flexible hose 10 and a short pipe 11 are arranged between the vertical conveyance pipe 6 and the tip nozzle 8. Is installed.

  The horizontal transfer pipe 4 includes an outer cylinder 4a and an inner cylinder 4b slidably inserted into the outer cylinder 4a, and can be expanded and contracted by relatively moving the outer cylinder 4a and the inner cylinder 4b by the expansion / contraction mechanism 12. It is like that. Further, the horizontal transfer pipe 4 is swingably connected to the separator 3 and can be swung by a swing mechanism 13. The vertical transport pipe 6 includes an outer cylinder 6a and an inner cylinder 6b slidably inserted into the outer cylinder 6a. The vertical conveying pipe 6 expands and contracts by moving the outer cylinder 6a and the inner cylinder 6b relative to each other by an expansion / contraction mechanism (not shown). It can be made to.

  The cargo handling material is sucked into the tip nozzle 8 together with the air, and the cargo handling material sucked from the tip nozzle 8 passes through the short pipe 11, the flexible hose 10, the vertical conveyance pipe 6, the flexible hose 9, the bend pipe 5, and the horizontal conveyance pipe 4. Thus, it is introduced into the separator 3. The cargo handling material introduced into the separator 3 is separated from the air and then supplied to the quay conveyor 14 or other ship (not shown), while the air passes through the air pipe 15 and is a vacuum pump. 16 is sucked.

  As shown in FIG. 2, in the present embodiment, the tip nozzle 8 has an inner cylinder 17 connected to the tip of the short tube 11 and an outer cylinder 18 attached to the outer peripheral portion of the inner cylinder 17. . The outer cylinder 18 is suspended from the inner cylinder 17 by a plurality of outer cylinder stroke adjustment turnbuckles 19, and a plurality of secondary air inlets 20 are provided at the upper end of the outer cylinder 18. A gap 21 between the lower end portion of the inner cylinder 17 and the lower end portion of the outer cylinder 18 is changed by adjusting the axial relative position between the inner cylinder 17 and the outer cylinder 18 by the turnbuckle 19 for adjusting the outer cylinder stroke, Alternatively, the secondary air amount is adjusted by changing the opening area of the secondary air suction port 20 by the lid member 22 provided in the secondary air suction port 20.

  As shown in FIGS. 2 and 3, the tip nozzle cargo handling promotion device 30 according to the present embodiment is provided at the tip of the tip nozzle 8 and is supplied from a compressed air supply source B to assist the flow of cargo handling material. A jet nozzle 31 for jetting compressed air. The compressed air supply source B is disposed outside the tip nozzle 8. In the present embodiment, a plurality of (six in the illustrated example) jet nozzles 31 are provided in the circumferential direction of the tip nozzle 8 at predetermined intervals (equal intervals in the illustrated example). In FIG. 3, the leftmost jet nozzle 31 (shown by a solid line) and the rightmost jet nozzle 31 (shown by a one-dot chain line) are the same.

  In the present embodiment, the jet nozzle 31 is inserted into the through hole 32 provided in the lower end surface of the outer cylinder 18 of the tip nozzle 8 and is moved along the axial direction of the tip nozzle 8 by the actuator 33. It is like that. That is, the jet nozzle 31 is provided so as to be movable in the axial direction of the tip nozzle 8 via the actuator 33.

  The jet nozzle 31 according to the present embodiment includes a cylindrical cylindrical portion 34 connected to a later-described jet nozzle air pipe 42 and a conical cone portion 35 connected to the tip of the cylindrical portion 34. Yes. In the present embodiment, the jet nozzle 31 is provided at the cone portion 35, opens toward the axial center C of the tip nozzle 8, and extends obliquely downward, and at the tip portion of the cylindrical portion 34. And a second ejection hole 37 that opens toward the axial center C of the tip nozzle 8 and extends horizontally (see FIG. 4).

  In the present embodiment, a recess 38 is provided in the outer periphery of the tip of the cylindrical portion 34 of the jet nozzle 31, and the second ejection hole 37 is provided in the recess 38 (see FIG. 4). The second ejection hole 37 can be closed by a plug (not shown). By selectively closing the second ejection hole 37 with a plug, the injection amount of compressed air in the entire jet nozzle 31 can be adjusted. The plug that closes the second ejection hole 37 is sized to be accommodated in the recess 38 of the cylindrical portion 34, and the jet nozzle 31 can be placed in the tip nozzle 8 even when the second ejection hole 37 is blocked by the plug. Can be stored.

  In the present embodiment, the compressed air from the compressed air supply source B is temporarily supplied to the annular air pipe 39 that is disposed inside the outer cylinder 17 of the tip nozzle 8 and surrounds the inner cylinder 17. The jet nozzle 31 is supplied to each jet nozzle 31 via a jet nozzle air hose 40, an expansion / contraction pipe 41, and a jet nozzle air pipe 42 (see FIG. 3). The expansion / contraction pipe 41 includes an outer cylinder 41a connected to the jet nozzle air hose 40 and an inner cylinder 41b connected to the jet nozzle air pipe 42 so that the expansion / contraction pipe 41 expands / contracts according to the expansion / contraction of the expansion cylinder 46 described later. It has become.

  The jet nozzle air hose 40 is provided with a jet nozzle solenoid valve (in this embodiment, an on-off valve) 43 that opens and closes an air flow path in the jet nozzle air hose 40. The jet nozzle solenoid valve 43 may be a flow control valve. The jet nozzle solenoid valve 43 is electrically connected to a control panel 45 by an electric pipe 44 and is controlled to be opened and closed by the control panel 45.

  In the present embodiment, the actuator 33 is composed of an expansion / contraction cylinder (in this embodiment, an air cylinder) 46. The telescopic cylinder 46 includes a cylinder 46 a that is rotatably attached to the inner peripheral surface of the outer cylinder 18 of the tip nozzle 8, and a rod 46 b that is rotatably attached to the jet nozzle air pipe 42. . The compressed air from the compressed air supply source B is supplied to the telescopic cylinder 46 through the telescopic cylinder air hose 47.

  The telescopic cylinder air hose 47 is provided with a telescopic cylinder solenoid valve (open / close valve in this embodiment) 48 that opens and closes the air flow path in the telescopic cylinder air hose 47. The telescopic cylinder solenoid valve 48 may be a flow control valve.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 4, when the tip nozzle cargo handling promotion device 30 is not used, the jet nozzle 31 (shown by a one-dot chain line) is stored in the outer cylinder 18 of the tip nozzle 8 by contracting the telescopic cylinder 46. .

  On the other hand, when using the tip nozzle cargo handling promotion device 30, the jet nozzle 31 (shown by a solid line) is moved by the telescopic cylinder 46 to a position where compressed air from the tip of the jet nozzle 31 can be blown into the cargo handling object. Specifically, the jet nozzle 31 is moved so that the tip of the jet nozzle 31 is positioned below the tip of the tip nozzle 8.

  Then, with the jet nozzle 31 moved to a position where compressed air from the tip of the jet nozzle 31 can be blown into the cargo, the tip nozzle 8 is inserted into the cargo. At this time, the tip portion of the jet nozzle 31 provided at the tip portion of the tip nozzle 8 is also inserted into the cargo handling article.

  The compressed air supplied from the compressed air supply source B is ejected from the first ejection hole 36 and the second ejection hole 37 provided at the tip of the jet nozzle 31, and the particles of the cargo are blown up. At this time, since the first ejection hole 36 and the second ejection hole 37 of the jet nozzle 31 are opened facing the axial center C of the tip nozzle 8, the particles of the cargo handling material enter the inner cylinder 17 of the tip nozzle 8. Blown up. By blowing up the particles of the cargo, the interference between the particles is reduced and the fluidity is increased. The compressed air may be continuously ejected from the jet nozzle 31 or may be intermittently ejected.

  By increasing the fluidity of the cargo handling material, the cargo handling material is promoted to be sucked into the tip nozzle 8, and the cargo handling capacity and cargo handling capability of the pneumatic unloader 1 are improved. Therefore, stable cargo handling capability can be obtained even when cargo handling such as pellets or prismatic cargoes is handled.

  Further, in the present embodiment, when the cargo handling material loaded on the ship 7 is reduced, the telescopic cylinder 46 is contracted, and the jet nozzle 31 is moved to the tip nozzle 8 so that the tip of the jet nozzle 31 does not hit the bottom of the cargo handling material loading unit. It is made to move upward from the tip of.

  As described above, according to the present embodiment, the jet nozzle 31 for ejecting the compressed air supplied from the compressed air supply source B to assist the flow of the cargo handling material is provided at the tip of the tip nozzle 8 to promote the handling of the tip nozzle. Since the apparatus 30 is configured, the fluidity of the cargo handling material can be increased by blowing up the particles of the cargo handling material with the compressed air ejected from the jet nozzle 31, and the cargo handling capacity of the pneumatic unloader 1 can be improved.

  Further, since the jet nozzle 31 is provided so as to be movable in the axial direction of the tip nozzle 8 via the actuator 33, the jet nozzle 31 is placed in the tip nozzle 8 when the tip nozzle cargo handling promotion device 30 is not used. Can be stored.

  In addition, since a plurality of jet nozzles 31 are provided at a predetermined interval in the circumferential direction of the tip nozzle 8, the fluidity of the cargo can be efficiently increased, and the cargo handling capacity of the pneumatic unloader 1 is improved. be able to.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various other embodiments can be adopted.

  For example, as shown in FIGS. 5 and 6, the telescopic cylinder 46 and the telescopic pipe 41 may be integrated. In the illustrated example, an air flow path 49 for supplying compressed air to the telescopic cylinder 46 through the rod 46b is provided. In the embodiment shown in FIGS. 5 and 6, the compressed air from the compressed air supply source B is supplied to each jet nozzle 31 via the annular air pipe 39, the jet nozzle air hose 40, and the air flow path 49. It has become.

  Further, as shown in FIGS. 5 and 6, a protective frame 50 may be attached to the outer peripheral portion of the outer cylinder 18 of the tip nozzle 8, and a protective frame 51 may be attached to the lower end portion of the outer cylinder 18. These protective frames 50 and 51 are constituted by pipes, for example.

DESCRIPTION OF SYMBOLS 1 Pneumatic unloader 8 Tip nozzle 30 Cargo promotion device 31 for tip nozzle Jet nozzle 33 Actuator B Compressed air supply source

Claims (3)

  A device for promoting loading of a tip of a pneumatic unloader that loads a tip by inserting a tip nozzle into a granular load and sucking the load from the tip nozzle. A loading / unloading promotion device for a tip nozzle of a pneumatic unloader, comprising a jet nozzle for ejecting compressed air supplied from a compressed air supply source to assist the flow of an object.   The cargo handling promotion device for a tip nozzle of a pneumatic unloader according to claim 1, wherein the jet nozzle is provided so as to be movable in an axial direction of the tip nozzle via an actuator.   The cargo handling promotion device for a tip nozzle of a pneumatic unloader according to claim 1 or 2, wherein a plurality of the jet nozzles are provided at a predetermined interval in the circumferential direction of the tip nozzle.

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