JP2009083990A - Transfer device of sulfuric acid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer device of sulfuric acid, having flexibility in absorbing movement of a ship in shipping or landing of sulfuric acid, easily operated and correctly connected, and with reduced cost for installation and maintenance. <P>SOLUTION: In the transfer device, a chemical resistant hose 30 of which base end sides are connected with a pipe on a berth 7 side is suspended and supported at two portions or more, by a wire 25 suspended from a tip of a jib 15 attached to be rotated around a pillar 11 and elevated in a cantilever manner. By rotating and elevating the jib 15 and adjusting the length of the wire 25, a tip side of the hose 30 is moved to a connection part of piping on a ship 1 side, and by connecting between the piping on the berth 7 side and the piping on the ship 1 side by the hose 30, the ship can be connected so as to absorb increase/decrease in a level of the ship 1 caused by ebb and flow or increase/decrease of a load, and to absorb the movement of the ship 1 caused by wind. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sulfuric acid transfer device, and more particularly to a sulfuric acid transfer device for loading or landing sulfuric acid by connecting a land-side storage tank and a ship for transportation.

  While most of the ores used for copper smelting are imported from abroad by ships, chemicals such as sulfuric acid produced by copper smelting are exported by ships because of demand overseas. Yes. Conventionally, since ore and sulfuric acid have completely different properties such as solid and liquid, they have been transported by different transport ships. However, when a ship loaded with ore or a ship loaded with sulfuric acid returns to the port, the cargo hold will operate in an empty state and it will be very uneconomical. An ore / sulfuric acid carrier has also been proposed (Japanese Patent Laid-Open No. 2000-142560). In this way, improvements in the technology and efficiency of ship transportation of sulfuric acid have been attempted.

  Here, when a fluid such as liquid or gas is loaded into or unloaded from a ship, a loading arm is generally used. The loading arm is a device that transfers a fluid by linking a metal pipe movably with a swivel joint or the like, thereby flexibly connecting a land-side storage tank and a marine vessel (for example, Patent Document 1). ). Conventionally, the loading arm is used for loading or unloading sulfuric acid into a ship.

JP-A-11-1300

  However, conventional loading arms have poor flexibility to absorb tides during loading or unloading of sulfuric acid, up and down level of ships due to increase or decrease of loading capacity, and movement of ships due to wind. Of course, various mechanisms for absorbing the movement of such a ship have been proposed. However, a loading arm equipped with such a mechanism is expensive. In addition, since the fluid to be transferred is sulfuric acid, the conventional loading arm has been difficult to maintain due to corrosion of the steel material constituting the apparatus including the pipe. Here, as is well known, sulfuric acid is a colorless oily liquid having strong oxidative and corrosive properties. A 100% sulfuric acid having a specific gravity of 1.83 and a concentration of about 98% is called concentrated sulfuric acid. Sulfuric acid corrodes not only ordinary steel but also stainless steel, so there are many troubles due to corrosion even if it is done with great care in cargo handling work, and not only the cost for installing the loading arm but also the cost for repair is great It was something.

  In addition, since operations such as piping and connection have been complicated, there is a demand for an apparatus that can easily and accurately connect the berth-side piping extending from the land-side storage tank and the transportation ship. It had been.

Therefore, the present invention has the flexibility to absorb the movement of the ship due to winds and the like, the tides at the time of loading or landing of sulfuric acid, up and down of the ship level by increasing and decreasing the load capacity, and easy to operate. An object of the present invention is to provide a sulfuric acid transfer device capable of accurately connecting a land-side storage tank and a transport ship.
Another object of the present invention is to provide a sulfuric acid transfer device that can be installed at low cost and can be greatly reduced in maintenance cost.

  In order to solve the above-mentioned problems, the present invention according to claim 1 is directed to a berth in a sulfuric acid transfer device for loading or landing sulfuric acid by connecting between a storage tank on a land side and a ship for transportation. It has a wire that hangs down from the tip of the jib mounted in a cantilever shape so that it can be swung and raised around the installed pillar, and the length of the wire can be adjusted by unwinding or winding. The hose having chemical resistance connected to the berth-side pipe extending from the storage tank with the base end side extending from the storage tank by the wire is supported by hanging at least two places, turning the jib up and down, Adjust the length from the tip of the jib to move the tip side of the hose to the connecting part of the ship side piping, and connect the berth side piping to the ship side piping with the hose. And the tides, the upper and lower levels of the ship due to load increase and decrease, characterized by absorbing coupling the movement of the ship due to wind or the like.

  In order to solve the above-mentioned problem, the present invention according to claim 2 is the sulfuric acid transfer device according to claim 1, wherein the jib is at least a height position of a connecting portion of the pipe on the ship side at high tide and at empty load. It is possible to ascend to a higher position.

  In order to solve the above-mentioned problem, the present invention described in claim 3 is the sulfuric acid transfer device according to claim 1 or 2, wherein the wire can be unwound and wound by a winch having a ratchet function. Features.

  According to the sulfuric acid transfer device of the present invention, the berth-side piping and the ship-side piping are flexibly connected by a chemical-resistant hose. There is an effect that it is possible to flexibly absorb the movement of the ship due to ups and downs of the ship due to increase and decrease, wind and the like.

  Moreover, according to the sulfuric acid transfer device of the present invention, there is an effect that a hose having chemical resistance can be easily and accurately disposed at an appropriate position.

  Furthermore, according to the sulfuric acid transfer device of the present invention, there is an effect that the installation cost of the device can be reduced to about 1/10 of that of the conventional loading arm type sulfuric acid transfer device.

  Hereinafter, the sulfuric acid transfer device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing from a storage tank on the land side to a ship for transportation, and FIG. 2 is a front view of one embodiment of the sulfuric acid transfer device according to the present invention.

  First, as shown in FIG. 1, sulfuric acid produced by copper smelting is stored in a storage tank 3 and is transported to a berth 7 by a pipe 5. Then, one end of the hose 30 of the sulfuric acid transfer device 10 is connected to the end of the pipe 5 on the berth 7 side, and the end of the hose 30 on the opposite side is connected to the pipe connection on the ship 1 side. Thus, the storage tank 3 and the hold of the ship 1 are connected to each other, and sulfuric acid in the storage tank 3 is transferred by a pump (not shown) and sent to the hold of the ship 1.

  The sulfuric acid transfer device 1 shown in FIG. 2 schematically includes a pillar 11 installed in a berth 7, a frame 13 that is pivotable and liftable around the pillar 11, and a cantilever with respect to the frame 13. A jib 15 attached in a beam shape, a wire 25 whose length from the tip of the jib 15 can be adjusted by unwinding or winding, and a hose 30 supported by being suspended by at least two or more places by the wire 25. It is prepared for. Hereinafter, each part will be described in detail.

  The pillar 11 is a columnar steel member and is fixedly attached to a predetermined position of the berth 7. Reinforcing plates 11 a are arranged at four locations around the lower side of the pillar 11. Here, the pillar 11 is preferably formed of a material having corrosion resistance and weather resistance since it is installed in a place where it is directly exposed to seawater or sea breeze and the transfer target is sulfuric acid. For example, by forming a coating film on a corrosion-resistant steel such as SUS with a synthetic resin such as acrylic or polyethylene, it is possible to form a member that can ensure accurate operation even under severe conditions. Can do. Not only the pillar 11 but also each member described later is the same. The pillar 11 is erected and fixed to the berth 7 via the base plate 11b, but is more firmly attached by an anchor member (not shown). In the present embodiment, the pillar 11 is fixed to the berth 7, but may be movable.

  A frame 13 that can turn around the pillar 11 is attached to the upper side of the pillar 11. The frame 13 is formed in a cylindrical shape by a steel member as in the case of the pillar 11. The frame 13 is turned by a gear case (not shown) in which a plurality of gears are combined, and the operation can be performed by appropriate hydraulic, electric, or manual power. The frame 13 can be moved up and down, and the frame 13 can be raised and lowered by, for example, a hydraulic cylinder or an actuator. Moreover, you may comprise so that it may operate | move electrically, manually, etc. via a gear similarly to the case of turning. Here, in order to facilitate the connecting work of the hose 30, the rising position of the frame 13 is the height of the connecting portion of the pipe on the ship 1 side when the height of a jib 15 to be described later is at least at high tide and when it is empty. It is preferable to be able to ascend to a position higher than the position. Furthermore, it goes without saying that operability and safety can be improved by providing brakes and stoppers in the turning and lifting mechanism.

  A jib 15 is attached to the side surface of the frame 13 like a cantilever. The jib 15 is a steel member having an H-shaped cross section, and is disposed so as to extend in the horizontal direction with respect to the vertically installed frame 13. Thereby, the jib 15 can be swung and lifted up and down around the pillar 11 via the frame 13. A sheave 27 is attached to the top surface of the jib 15 at three locations, and a sheave 29 is attached to the lower portion on the tip side of the jib 15. A wire 25 described later is stretched around the sheaves 27 and 29.

  The wire 25 is suspended from the tip of the jib 15 and is stretched so as to reach the vicinity of the base portion of the pillar 11 via the sheave 27 of the jib 15. A cover member 20 for covering the wire 25 is attached to a portion extending in the vertical direction so as to be parallel to the pillar 11 and the frame 13. A hook 26 is attached to the end portion of the wire 25 suspended from the tip end side of the jib 15, and the opposite end portion of the wire 25 is wound around a winch 23 having a ratchet mechanism. Thus, the wire 25 can be unwound and wound, and as a result, the length from the tip of the jib 15 can be adjusted as appropriate. The winch 23 can be operated by either manual or electric drive.

  Two chain members 25a and 25b are attached to the hook 26 attached to the tip of the wire 25, and a hose 30 to be described later is supported at two places by the two chain members 25a and 25b. ing. Thus, the reason for supporting the hose 30 not at one place but at two places is to facilitate the handling of the hose 30 suspended. That is, the hose 30 is interposed between the berth 7 and the ship 1 so as to transfer sulfuric acid, and thus has a certain length. When the sulfuric acid is circulated therein, the hose 30 has a considerable weight. . For this reason, if the hose 30 is supported only at one location, it is not easy to handle the portion that is grounded to the ground. Therefore, by supporting at least two places, preferably at least two places, the grounding portion of the hose 30 to the ground is reduced, and as a result, the handling of the hose 30 is facilitated. Thus, the handling of the hose 30 can be facilitated by reducing the portion where the hose 30 is in contact with the ground as much as possible.

  The hose 30 is made of a material having chemical resistance because it transfers sulfuric acid. That is, the hose 30 is formed of a material having improved chemical resistance against chemicals by combining various synthetic resins with polypropylene (PP) as a main material. Also. Since the hose 30 has a composite structure composed of several tens of layers reinforced with a wire spiral inside and outside, the hose 30 is excellent in flexibility and is not easily broken or twisted even during repeated bending. A joint 31 is attached to the tip of the hose 30 so that it can be connected to a pipe (not shown) connected to the hold of the ship 1. On the other hand, the end of the hose 30 opposite to that of the hose 30 is connected to a joint 5 a connected to a pipe 5 extending from the storage tank 3, whereby the hull of the ship 1 and the storage tank 3 are connected to the hose of the transfer device 10. 30 is communicated with each other. Here, it is preferable that the length of the hose 30 is secured so as to be able to absorb the movement of the ship 1 due to wind and the like, up and down of the level of the ship 1 due to tides, increase / decrease of the load. As described above, since the sulfuric acid is transferred by the flexible hose 30, it becomes possible to easily absorb the movement of the ship 1 due to tides, up and down of the level of the ship 1 due to increase / decrease of the load capacity, and wind. .

  In addition, by providing a mechanism for electronically controlling the turning and raising / lowering mechanism of the frame 13, the jib 15 can be automatically moved to a predetermined position and stopped at that position. In addition, a detector for detecting an overload applied to the wire 25 is attached, and when it is detected that the wire 25 is overloaded with a predetermined size, the wire 25 is unwound little by little, or the position of the jib 15 It is also possible to add a function to reduce the burden on the transfer device 10 by changing the above.

  In order to transport sulfuric acid from the sulfuric acid storage tank 3 on the land side to the ship anchored at sea, the height to the upper part of the frame 13 is about 4 m, the length of the jib 15 is about 4.4 m, from the joint 5a. The sulfuric acid was transferred using the transfer device 10 in which the length to the joint 31 was about 9 and the inner diameter was 15 cm and the hose 30 was supported by the wire 25 at two locations. When sulfuric acid flows through the hose 30 having a length of about 9 m and an inner diameter of about 15 cm, the weight of the hose 30 becomes about 300 kg or more, but the work of connecting the joint 31 to the piping of the ship 1 while turning and raising and lowering the jib 15 It was easy to do from the side. In addition, there were fewer failures compared to the conventional loading arm type transfer device, the installation cost was reduced to about 1/10, and the maintenance cost was greatly reduced. Furthermore, the maintenance rate was only once a year and there was no problem.

  As described above, the preferred embodiment of the present invention has been described in detail. However, the present invention is not limited to the specific embodiment, and within the scope of the gist of the present invention described in the claims, Needless to say, various modifications and changes are possible.

It is a schematic diagram showing from a land-side storage tank to a ship for transportation. It is a front view of one Embodiment of the transfer apparatus of the sulfuric acid which concerns on this invention.

Explanation of symbols

1 ship 3 storage tank 5 pipe 5a joint 7 berth 10 transfer device 11 pillar 11a reinforcing plate 11b base plate 13 frame 15 jib 20 cover member 23 winch 25 wire 25a chain member 25b chain member 27 sheave 29 sheave 30 hose 31 joint

Claims (3)

In a sulfuric acid transfer device for loading or landing sulfuric acid by connecting between a storage tank on the land side and a ship for transportation,
A wire suspended from the tip of a jib mounted in a cantilevered manner so as to be able to swivel and move up and down about a pillar installed on the berth, and the wire extends from the tip of the jib by unwinding or winding. The hose having chemical resistance connected to the berth-side pipe extending from the storage tank by the wire is supported by hanging at least two or more places.
The jib is swung and lifted and the length of the wire from the tip of the jib is adjusted to move the tip of the hose to the connecting part of the ship side pipe, and the berth side pipe and the ship side pipe A sulfuric acid transfer device characterized in that the hose is connected with the hose so as to absorb tides, up and down of the level of the ship due to increase / decrease of the load capacity, and movement of the ship due to wind and the like. In the sulfuric acid transfer device according to claim 1,
The sulfuric acid transfer device according to claim 1, wherein the jib can be raised to a position higher than a height position of a connecting portion of the ship-side pipe at least at high tide and when empty. In the sulfuric acid transfer device according to claim 1 or 2,
2. The sulfuric acid transfer device according to claim 1, wherein the wire can be unwound and wound by a winch having a ratchet function.

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