JPS622320Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is applicable, for example, to flat-bottomed floating structures such as oil drilling rigs and other offshore bases for offshore development, or to pumping up seawater from floating structures such as barges that are jacked up and raised on the water surface. , harbor seawater,
It also relates to a device for pumping up seawater, etc., which is used as a water intake facility for lake water (fresh water) such as a lake or marsh.

Conventionally, this type of equipment uses riser pipes equipped with a pump and motor at the upper or lower end of the pipe body, but these riser pipes are manufactured with a diameter designed solely for pumping water. Because it is vulnerable to collisions with wind, waves, and drifting objects, a truss-structured frame made of pipe-type caissons and angle materials was installed as a strength member for protection and reinforcement.

However, these methods have the following drawbacks. In other words, (a) In the case of a caisson type protection frame As shown in Figure 1, several riser pipes b are installed inside a caisson a to protect the riser pipes b, but the caisson a has a large diameter. It becomes a pipe.

Therefore, it needs to be strong enough to withstand tidal currents and wave forces, making it thicker and heavier.

The structure for attaching large diameter and heavy objects to barge c also becomes complicated.

The installation location of the caisson is also restricted within the barge c, making it difficult to take out the riser pipe b for maintenance, and requiring submersible pump d and motor e to be replaced by diving.

There are also restrictions on the expansion of riser pipes b.

There are drawbacks such as.

(b) In the case of a truss structure reinforcement frame As shown in Figure 2, a truss structure reinforcement frame f is assembled, a riser pipe b is placed inside this frame, and the reinforcement frame f and riser pipe b are fixed with a riser pipe band g. Also, since the riser pipe b is bent and guided into the barge c via the expansion joint h, the structure becomes larger and more complex due to the need for a reinforced frame f that can handle tidal currents, wave force, and wind power. This also affects transportation costs.

Furthermore, reinforcing legs i are required to supplement the strength, making installation work even more difficult, and cracks are likely to occur due to the difference in vibration frequency between the vibration of the barge body and the frame itself.

When pulling the submersible pump d, motor e, etc. out of the water for maintenance, after removing the riser pipe band g and expansion joint h,
It takes time and effort to lift the riser pipe vertically using a crane (not shown).

Furthermore, there is a restriction that the riser pipe b must be lifted vertically within the reinforcing frame f, and improvements are required from the viewpoint of work safety.

There are many welding points, which leads to production time and distortion problems.

On-site installation work on the barge takes a long time and is dangerous.

For the above, there is a method of replacing the parts by diving, but this does not improve the trouble and danger.

There are drawbacks such as.

The present invention eliminates the protective caisson and reinforcing frame of the riser pipe as described above, and saves material quality.
The purpose of this project is to shorten production time, reduce installation time on the barge on site, reduce the impact of tides, waves, and wind, and facilitate maintenance of submerged items such as motors and pumps. The submersible pump and motor are attached to the submerged part of the riser pipe, and there are multiple riser pipe units that can be attached and detached halfway up the top to guide the pumped water into the barge, and each of these riser pipes The unit's riser pipe has a flexible diameter and wall thickness that take wind and waves into consideration, and is equipped with eddy current prevention fins in the submerged part, as well as a hanging pin protruding from the upper end. A supporting hardware with an upper platform form that suspends and supports each riser pipe unit by individually supporting pins, and a supporting hardware with a lower platform that receives external force from the side to each riser pipe. are provided extending above and below the outer periphery of the barge, and the upper and lower platform support hardware are provided with fixing members for securing bolts attached to the riser pipe with nuts, and The riser pipe has a rotating table for laying down the suspended riser pipe and a cradle for receiving the upper side of the riser pipe when it is turned sideways, and the space on the upper platform is used as a place for inspecting the riser pipe unit and motor. In order to serve as a storage area for riser pipes, the top of the barge is equipped with a support to support riser pipes.

Embodiments of the present invention will be described below based on the drawings.

Fig. 3 schematically shows the entire structure, which includes a known submersible pump 1 and an electric motor 2 at the lower end, and a spiral fin 3 for preventing swirling currents in the submerged part of the lower part, and a rotating pin 4 with a riser pipe in the lower part. Using a flexible riser pipe 5 provided with is passed through and taken out from the takeout pipe 7 led into the barge 8, so that there is no caisson or reinforcing frame outside the riser pipe 5.

At the upper end of the riser pipe 5, the riser pipe 5
In order to suspend the barge 8 with a simple structure, the riser pipe pin 9 is made to protrude laterally.
By hooking the pin 9 with the riser pipe to the tip of the support hardware 10 with the upper platform that projects horizontally from the top of the barge 8, the riser pipe 5 is suspended and supported, and the riser pipe 5 is suspended and supported horizontally from the bottom of the barge 8. The riser pipe 5 is supported by a protruding support metal fitting 11 with a lower platform so that it does not receive the vertical load of the riser pipe 5, but receives only the external force due to the tidal current and wave force.

As shown in FIGS. 4 to 6, the relationship between the riser pipe 5 and the support hardware 10 with the upper platform is such that the support hardware 10 with the upper platform is composed of a support base 10a and a mounting hardware 10b. Support platform 10 juts out along barge passage space 8a
Mounting hardware 10b that engages with each riser pipe attachment pin 9 is attached to the top surface of the support base 10a in order to independently support several riser pipes 5 (eight in the embodiment). , a checker plate 10c serving as a foothold is stretched, and a fixing bolt 10d attached to the riser pipe 5 and the bolt 1 are attached.
The support metal fitting 10 and the riser pipe 5 can be fixed and separated by a lock nut 10e screwed into the lock nut 10e. Note that 10f is a grooved fixing member fixed on the support base 10a so as to apply the tightening force of the lock nut 10e, that is, the fixing force of the riser pipe 5.

The relationship between the riser pipe 5 and the support hardware 11 with the lower platform is as shown in FIGS. 7 to 9, and the support hardware 11 with the lower platform is also composed of a support base 11a and a mounting hardware 11b. However, the support stand 11a overhangs the barge 8 and supports the support stand 11a.
Mounting hardware 11b for receiving only the external force in the lateral direction of each riser pipe 5 is attached to 1a corresponding to each riser pipe 5, and a checker plate 11c as a scaffold is placed on the upper surface of the support base 11a. The support hardware 11 and the riser pipe 5 can be fixed and separated by a fixing bolt 11d attached to the riser pipe 5 and a lock nut 11e screwed into the bolt 11d, and the upper and lower support hardware 10
and 11 two-point support system. Note that 11f is a fixing member similar to the fixing member 10f.

Furthermore, a rotary table 12 is provided on the top of the barge 8 to overhang the riser pipe 5 for laying it down when storing it, as shown in FIGS. 10 and 11. A cradle 13 is provided on the top of the barge 8 as shown in FIG. 1,
The barge 8 is provided at a height with an appropriate slope in consideration of drainage of the electric motor 2, expansion joint 6, and extraction pipe 7, and is located at a required distance from the support 14, as shown in FIG. A support 15 with a band has a band 17 that can secure the riser pipe 5 with a tightening device 16 as shown in FIG.
is provided at the same height as the support 14.

In addition, in FIG. 3, 18 is a leg, in FIG.
In the figures and FIG. 13, reference numeral 20 denotes a rubber sheet provided on a roller supporting the riser pipe 5.

Since the device of the present invention has the above-mentioned configuration, when pumping up seawater, etc., each independent pump is suspended and supported via pins 9 from the upper platform supporting hardware 10, as shown in FIG. This is done using a riser pipe unit. At this time, since the submersible pump 1 and the electric motor 2 are directly connected to the riser pipe 5, and the submerged portion of the riser pipe 5 is provided with fins 3 for preventing the generation of eddies, the vibration of the riser pipe 5 can be minimized. Also, since the riser pipe 5 itself has a plastic design with flexibility, it can sufficiently cope with tidal currents, wave force, wind power, etc.
In addition, transmission of vibration can be cut off by the expansion joint 6.

Next, when removing the riser pipe unit for maintenance etc.,
Remove the lock nuts 10e, 11e on the checker plates 10c, 11c stretched over the riser pipe 5 to release the fixation between the riser pipe 5 and the supporting hardware 10, 11. Remove and lift the riser pipe unit using crane 21. At this time, since each riser pipe unit can be operated independently, the upper and lower supporting hardware 10 of the target riser pipe 5,
By removing fixing bolts 10d, 11d and lock nuts 10e, 11e from 11 and removing pipe 7, the desired riser pipe unit can be handled independently. Since it is hung on the support metal fitting 10 with the foam, it can be easily hoisted up by the crane 21.

When storing and fixing the riser pipe unit lifted as described above, as shown in FIG. The rotating pin 4 with the riser pipe attached to the lower part of the riser pipe 5 is moved to the position of the stand 12 as shown in FIGS. 10 and 11 by turning the crane 21.
Hang and support as shown in the figure. Next, as shown in C, the hook of the crane 21 is lowered, the riser pipe unit is laid down, and the upper end of the riser pipe 5 is received by the cradle 13 shown in FIG. Next, place the riser tube unit in the state shown in D.
It is moved by the crane 21 to the position of the checker plate 10c of the upper platform support hardware 10 as shown in E, and placed on the support 14 and banded support 15 attached to the barge 8 as shown in FIGS. 13 and 14. The riser pipe 5 is fixed by tightening the band 17 of the banded support 15 and stored.

Note that the device of the present invention is not limited to the illustrated embodiment, and the number of riser pipe units supported by the upper and lower support metal fittings 10 and 11 with platform may be other than eight, and other types of riser pipe units of the present invention may be used. Of course, various changes may be made without departing from the spirit of the invention.

As described above, according to the device of the present invention, the riser pipe is made flexible and the conventional protective caissons and reinforcing frames are abolished.
The structure is suspended via pins and is supported using a two-point support system that does not receive vertical loads but supports external forces. Therefore, material costs can be saved, and the number of manufacturing days can be shortened due to a significant reduction in welding work.

(ii) Since the riser pipe unit is simply suspended via pins and fixed with bolts and nuts,
It can be easily installed and removed, shortening the installation time on the barge on site and ensuring safety.

(iii) The supporting hardware with the upper platform extending over the outer periphery of the barge can be used both as a maintenance work area and a storage area for the riser pipe unit, making it possible to use the space effectively and also for suspending the riser pipe unit. Maintenance is also easy because cranes, etc. can be used easily.

(iv) It can be made to have less influence on tides, waves, and wind.

(v) By providing a spiral fin in the submerged portion of the riser pipe, it is possible to prevent vortices generated by laminar flow and reduce the vibration of the riser pipe, so that the vibration of the riser pipe can be reduced to the minimum required without protecting or reinforcing the riser pipe. The diameter and wall thickness can be made as large as possible.

It can produce excellent effects such as

[Brief explanation of the drawing]

1 and 2 are both schematic diagrams showing a conventional example, FIG. 3 is a side view of the device of the present invention, FIG. 4 is a view taken in the direction of the arrow in FIG. 3, and FIG. 6 is a plan view of FIG. 5, FIG. 7 is a view taken in the direction of the arrow in FIG. 3, FIG. 8 is an enlarged view of a portion of FIG. 3, FIG. 9 is a plan view of FIG. Fig. 10 is a side view of the turntable in the device of the present invention, Fig. 11 is a front view of Fig. 10, Fig. 12 is a side view of the cradle, Fig. 13 is a side view of the support, and Fig. 14 is the band. FIG. 15 is a side view of the attached support and a schematic front view showing how the riser pipe unit is lifted by a crane, laid down on its side, and stored. 1... Submersible pump, 2... Electric motor, 3...
Spiral fin for preventing vortex flow, 5...Riser pipe, 6
...Expansion joint, 7...Take-out pipe, 8...Barge,
10... Support hardware with upper platform, 11
...Support hardware with lower platform form.

Claims (1)

[Scope of utility model registration request] A submersible pump and a motor are attached to the submerged part of the riser pipe, and a plurality of riser pipe units are installed in the upper part of the riser pipe in which a take-out pipe for guiding the pumped water into the barge can be attached and detached, and the riser pipe of each of these riser pipe units is In addition to being flexible, the submerged portion is provided with eddy current prevention fins, and hanging pins are provided protruding from the upper end so that each riser pipe unit can be suspended by supporting each pin individually. A supporting metal fitting with an upper platform formed in a cylindrical shape, and a supporting metal fitting with a lower platform designed to receive external force from the side on each riser pipe are respectively provided to extend above and below the outer periphery of the barge,
Furthermore, the support hardware with the upper and lower platform forms is provided with a fixing member for fastening bolts attached to the riser pipe with nuts, and furthermore, a rotating table is provided at the top of the barge for turning the suspended riser pipe sideways. A device for pumping up seawater, etc., comprising: a cradle for receiving the upper side of the riser pipe when it is laid down; and a support for supporting the riser pipe when it is stored.