KR100842175B1 - Chamber structure for underwater sealing - Google Patents

Abstract

A chamber structure for underwater sealing is provided to reduce working time and costs by being easily attached and detached for an installation. A chamber structure(100) for underwater sealing includes a main body(10), a movable suction unit(20), a sealing unit(30), and a buoyancy control unit(40). The main body contains a hollow and rectangular in shape. The movable suction unit detachably attaches the main body to a surface of working object. The sealing unit is installed on an upper part of the main body and seals the main body and the surface of the working object. The buoyancy control unit is installed on the main body and controls buoyancy of the main body.

Description

Chamber Structure for Underwater Sealing

1 is a perspective view of an underwater sealing chamber structure according to an embodiment of the present invention;

FIG. 2 is a side view of the underwater seal chamber structure of FIG. 1; FIG.

3 is a cross-sectional view of a sealing seal portion of an uneven shape which is installed on an upper end of the main body of the underwater sealing chamber structure of FIG. 1 and is in watertight contact with the surface of the workpiece;

4 is a perspective view of a movable adsorption unit consisting of a lifting cylinder actuator fixed to a main body surface of the underwater sealing chamber structure of FIG. 1 and a vacuum suction unit connected to the lowering cylinder actuator to closely contact the surface of the object to be worked on;

5 is a cross-sectional view of the vacuum adsorption portion of FIG. 4;

FIG. 6 is a schematic diagram of a buoyancy control unit (ballast) fixedly installed on the body surface of the underwater sealing chamber structure of FIG. 1 to facilitate movement and provisional attachment of the chamber structure in water; FIG.

FIG. 7 is a view showing a state in which the working object surface is watertightly sealed by attaching and installing the underwater sealing chamber structure of FIG. 1 to the ship bottom surface for maintenance work on board;

FIG. 8 is a perspective view of a partially sealed embodiment of the underwater sealing chamber structure of FIG. 1, wherein the lower portion of the chamber structure is openable.

<Description of the symbols for the main parts of the drawings>

10: chamber body for underwater operation

17a: air supply

19: observation window

20: movable adsorption unit

20a: vacuum suction unit

20b: connection load

20c: cylinder actuator

30: sealing part

30a: seal body

30b: seal head

30c: head side

31: recess

33: hollow hole

40: buoyancy control unit

43: exhaust valve

45: air supply valve

47: water supply drain

60: camera / lighting unit

The present invention relates to an underwater operation method in ships used for installing or repairing large underwater structures, such as ships and artificial islands. In repairing relatively small damaged parts on board or in offshore structures, irrespective of the shape or angle of the work surface, the work surface can be repaired directly from the sea without lifting the work object in the dry dock. The present invention relates to an underwater sealing chamber structure that can be easily and safely carried out at low cost in a ship or an offshore structure by avoiding expensive underwater work.

Among the conventional techniques of repairing cracks on the bottom of super-sized vessels, such as mini-cofferdams, general underwater exposure direct welding, and general patching, etc. It is used

The double submerged cladding method covers the pyramid-shaped underwater submerged minicofferdams on the bottom cracks of large ships or offshore submarines, which are then welded to the outside of the minicofferdams by underwater exposure direct welding. After finishing the repair of the crack part on board, it goes into the water again, cuts the copper dam welded into the water and cuts the remainder of the cut by grinding.

Although this method is relatively safe and can achieve high quality work, it has the disadvantage that it has to go through complicated process such as underwater welding, cutting and grinding for installing and withdrawing the mini cofferdam. It is not possible to secure safety, such as perforation of the bottom of the bottom surface, which is likely to be applied to the bottom repair method of such expensive offshore structures. Above all, it is impossible to perform ground dry welding on the bottom part.

In addition, wet welding and general patching applications are unreliable in quality, making them unsuitable for bottom repairs of offshore structures such as ultra-expensive ultra-large vessels or offshore artificial islands.

The present invention has been made to solve the above-mentioned problems of the prior art, by realizing the perfect water tightness of the work surface in the water to easily repair the work on board the ship, to improve the quality of work, the process of fastening and detaching It is an object of the present invention to provide a chamber structure for underwater sealing that can maximize the working efficiency and reduce the cost by providing a convenient moving function in the water.

In addition, the present invention provides an underwater sealing chamber structure that can be flexibly applied without being constrained by the shape of the marine structure, such as super large marine floats, ship barge joint construction, or repair and repair of large vessels that cannot be placed on dry docks. It aims to provide.

In order to achieve the above object, the present invention provides a hollow body having a top open, the air inlet arranged to supply air in the body, and a drain control valve for regulating the inflow and outflow of water into and out of the body, The main body is further provided with a viewing window for checking the state in the main body at the upper end side; a sealing seal portion provided at the upper end of the main body and sealingly contacting the work object; and a lifting cylinder actuator fixedly fixed to the outer surface of the main body at regular intervals. And a vacuum suction unit connected to the upper end of the cylinder actuator, the movable suction unit for watertightly attaching the main body to the surface of the workpiece, and a buoyancy control unit provided on the main body surface to adjust the buoyancy of the main body. Provided is a sealing chamber structure.

According to one embodiment of the invention, the hollow body is characterized in that the hollow polygonal tubular.

According to one embodiment of the invention, the hollow body is characterized in that the hollow cylindrical.

According to an embodiment of the present invention, the main body further comprises a camera / lighting unit.

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According to an embodiment of the present invention, the sealing seal portion is made of a flexible elastic material, and has a seal body formed with a recess fitted in the upper edge of the main body, and a seal head in close contact with the surface of the workpiece as the upper end of the main body. The seal head may include a head surface and a hollow hole inside the head surface having one or more protrusions formed at predetermined intervals.

According to an embodiment of the present invention, the elevating cylinder actuator is characterized in that it is driven by any one of the drive source of hydraulic and pneumatic.

According to an embodiment of the present invention, the vacuum adsorption unit is connected to the lifting cylinder actuator and the hinge shaft-joint is characterized in that the lifting and lowering.

According to an embodiment of the present invention, the vacuum adsorption unit is connected to a vacuum source.

According to one embodiment of the invention, the buoyancy control unit is provided with a compartment, an air supply valve for supplying air in the compartment, an exhaust valve for discharging the air in the compartment, and a water supply and drain for allowing water in and out of the compartment, Characterized in that it further comprises a see-through window for checking the state of the water supply and drainage in the compartment.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the chamber structure for underwater work of the present invention.

1 is a perspective view of an underwater sealing chamber structure according to an embodiment of the present invention, Figure 2 is a side view of the underwater sealing chamber structure of FIG.

Referring to these drawings, the underwater sealing chamber structure 100 according to the present invention is a top-opened rectangular cylindrical hollow body 10, and the hollow body 10 to be detachable to the working surface of the work object in the water A movable adsorption unit 20 for watertight attachment, a sealing seal portion 30 provided at an upper end of the main body 10 and sealingly contacting the surface of the work object, and a buoyancy force attached to the main body 10 to adjust buoyancy of the main body. And an adjusting unit 40.

The main body 10 includes a supply port 17a arranged to supply air in the main body and a connector 17b to which various work cables are connected.

The bottom wall of the main body 10 is provided with a drain valve for entering and entering the water in the chamber structure.

In addition, the upper side of the main body 10 is further provided with a see-through window 19 that can check the state in the main body, by visually checking whether the environment has become a workable environment inside the main body by checking the state of the water escaped from the inside of the main body; You can check it.

Although the main body 10 is illustrated as having an upper open rectangular cylindrical structure, if necessary, it may have a hollow polygonal cylindrical shape or a hollow cylindrical structure.

FIG. 3 is a cross-sectional view of a sealing seal 30 having a concave-convex shape installed on an upper end of the main body 10 of the underwater sealing chamber structure 100 of FIG. 1 to be in watertight contact with a surface of a workpiece.

The sealing seal portion 30 is made of a flexible elastic material, the seal body 30a is formed with a recess 31 fitted in the upper edge of the main body 10, the seal body is in close contact with the surface of the work object as the upper end The seal head 30b is provided.

The seal head 30b includes a head surface 30c having one or more protrusions 30c 'formed at regular intervals and a hollow hole 33 inside the head surface.

Therefore, when the seal head 30b comes into contact with the surface of the work object, the head surface 30c is pressed against the work surface and is elastically pressed toward the working surface side by the hollow hole 33 inside the head surface 30c. Since the projections 30c ′ protruding from the surface 30 are more closely adhered to the working surface, the watertightness between the underwater structure chamber structure body and the workpiece is ensured.

4 is a perspective view of the movable adsorption unit 20, and FIG. 5 is a cross-sectional view of the vacuum adsorption unit 20a of the movable adsorption unit 20 of FIG. 4.

Referring to these drawings, the movable adsorption unit 20 includes a lifting cylinder actuator 20c fixedly installed on the main body surface of the underwater seal chamber structure 100 of FIG. 1, and a vacuum suction adhering to the surface of the workpiece. A connection rod 20b provided between the portion 20a and the cylinder actuator 20c and the vacuum suction unit 20a to lift and lower the vacuum suction unit 20a by the lifting and lowering driving force of the cylinder actuator 20c. Equipped.

A front cylinder fluid supply port 21c and a rear cylinder fluid supply port 23c are disposed at upper and lower portions of the cylinder actuator 20c, respectively, to provide upward or downward driving force of the cylinder actuator 20c through fluid supply to each supply port. Make it up At this time, the fluid source is a pneumatic or hydraulic source, and the cylinder actuator is operated by pneumatic or hydraulic driving force.

The upward or downward driving force of the cylinder actuator 20c is transmitted to the connecting rod 20b to raise and lower the connecting rod, so that the suction part 20a connected to the connecting rod is lifted by the cylinder actuator.

The connecting rod 20b and the suction part 20a are hingedly connected by the joint connecting parts 21b and 21a, so that the suction part 20a is brought up and down by the connecting rod 20b while being in contact with the work target surface. Even if the angle is not vertical, it can be pivoted to make vertical contact with the work surface.

The vacuum suction unit 20a is formed of a cylindrical hollow body 21a and a suction pad 23a installed in the hollow body, and the hollow body is connected to a communication port 25a connected to a vacuum source (not shown). As a result, the adsorption unit is vacuum-adsorbed to the work target surface by removing water in the body and forming a vacuum state.

To facilitate such vacuum adsorption, the suction pad 23a has a skirt end 23a 'with a front end surface.

6 is a perspective view of a buoyancy control unit (ballast) fixed to the main body surface of the underwater sealing chamber structure of FIG. 1 to facilitate movement and provisional attachment of the chamber structure.

The buoyancy control unit 40 provides neutral buoyancy to the chamber structure to facilitate movement when the chamber structure is dropped into the working position while being dropped in water, and also works on the chamber structure moved to the working position. It is provided to provide positive buoyancy for injury when floating to the work surface to attach to the work surface.

The buoyancy control unit 40 is composed of a compartment 41, an air supply valve 45 for supplying air in the compartment, an exhaust valve 43 for discharging air in the compartment, and the air supply to the water in and out of the compartment It is provided with a drain 47, it may further include a see-through window 49 to check the state of the water supply and drainage.

Meanwhile, the underwater sealing chamber structure 100 of FIG. 1 may be modified in the form of the chamber structure 100 ′ shown in FIG. 8.

The chamber structure 100 ′ shown in FIG. 8 is a structure in which the lower wall 15 is openable by a hinge (not shown) and a fastener 15a. The chamber is opened by the worker through the lower wall in an accidental situation. It is a configuration that allows you to go inside the structure and work underwater.

Operation of the underwater construction chamber structure of the above-described configuration and the underwater operation process using the same is as follows.

Underwater working chamber structures 100 and 100 'made of lightweight materials are launched from the bottom of the surface using a crane on board, or the operator directly launches the surface from a boat, etc. By adjusting the air supply valve of the buoyancy control unit 40 installed in the upper, to create a neutral buoyancy to move the body to the working position without weight.

In addition, after reaching the working position, the air supply valve of the buoyancy control unit is adjusted to give positive buoyancy to the chamber structure body, thereby causing the main body to float and temporarily attach to the work target surface such as the bottom of the ship.

In order to completely attach the working chamber structure to the work target surface in the temporary attachment state, the vacuum suction unit is first attached by attaching the vacuum suction unit to the work target surface and evacuating with a vacuum pump.

Thereafter, the cylinder actuator fixed to the lower part of the vacuum adsorption part is adjusted, and the main body is secondarily attached by pulling the main body upward so that the sealing seal portion of the upper part of the main body is in close contact with the work target surface.

With the watertight attachment complete, the supplied air pushes the water in the chamber structure out of the body by forcing air through the air supply of the body to remove water in the working chamber structure.

When the operator checks the watertightness of the interior through the observation window and judges that the proper working environment is achieved, the worker locks the drain valve installed in the lower part of the main body to block water from entering and maintains the watertight working surface in the watertight state. do.

In this state, the worker can perform welding work, inspection work, etc. which are necessary for a work object surface in the ship of a work object.

After work on board, the underwater worker adjusts the cylinder actuator to finely lower the main body to fill the water in the chamber structure, and separates the main body from the work surface by releasing the vacuum state of the vacuum adsorption unit, and then buoyancy as described above. The operation is terminated by easily returning the working chamber to the shipboard or the ground using the control unit.

According to the above-described configuration and operation, the underwater sealing chamber structure of the present invention is perfect for watertightness in a simple manner in the case of crack repair of the bottom surface of a very large ship or offshore structure that cannot be repaired by mounting on a dry dock or costly. It is very easy to move, detach and attach for installation, which can reduce the construction period and construction cost, and can be attached and removed without restricting the direction and form of the bottom. Above all, the quality and reliability of underwater work As a result, it is possible to propose a new engineering method that breaks the existing common sense that crack repair on the bottom of a ship is only possible on a dry dock.

Claims (12)

delete delete delete An underwater sealing chamber structure for watertight sealing of an object to be worked on the ship, A hollow body having an upper opening, provided with an air inlet arranged to supply air in the body, and a drainage control valve on the bottom wall for controlling the inflow and outflow of water into and out of the body, and at the upper side, a viewing window for checking the state inside the body. This body further provided; A sealing seal portion provided at an upper end of the main body and in sealing contact with a work object; A movable suction unit comprising a lifting cylinder actuator fixed to the outer surface of the main body at regular intervals and a vacuum suction unit connected to the upper end of the cylinder actuator to detachably seal the main body to the surface of the work object; Underwater sealing chamber structure comprising a buoyancy control unit is provided on the body surface to adjust the buoyancy of the body. 5. The underwater seal chamber structure of claim 4, further comprising a camera / lighting unit within the body. 5. The seal according to claim 4, wherein the sealing seal portion is made of a flexible elastic material, and has a seal body formed with a recess fitted to an upper edge of the main body, and a seal head in close contact with the surface of the workpiece as the upper end of the main body. The head is a chamber structure for underwater sealing, wherein the head surface and the hollow hole inside the head surface formed with one or more projections at regular intervals. The chamber structure of claim 4, wherein the elevating cylinder actuator is driven by a drive source of either hydraulic or pneumatic. The submerged chamber structure of claim 4, wherein the vacuum suction unit is pivotally lowered in connection with a hinge shaft-joint connected to the elevating cylinder actuator. 9. The chamber structure of claim 8, wherein the vacuum adsorption portion is connected to a vacuum source. The submerged seal according to claim 4, wherein the buoyancy control unit has a compartment, an air supply valve for supplying air into the compartment, an exhaust valve for discharging air in the compartment, and a water supply and drain port for introducing water into and out of the compartment. Chamber structure. The submerged chamber structure of claim 10, wherein the buoyancy control unit further comprises a viewing window for checking a water supply and drainage state in the compartment. The chamber structure of claim 4, wherein the bottom wall is openable.

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