KR20220055566A - Durability test system of LNG bunker devic - Google Patents

Abstract

The present invention relates to a durability test system of an LNG bunkering device, and more specifically, to a durability test system of an LNG bunkering device for connection during the injection of cryogenic LNG into a ship. The durability test system of an LNG bunkering device is a durability test system of an LNG bunkering device in which durability test devices of a quick coupler (QC), a disconnection coupling (DC), an emergency removal coupling (ERC) and bellows are integrally combined with one another. The durability test device of an LNG bunkering system comprises: an upper-end coupling part (10') having the QC and the DC combined therewith; a middle-end coupling part (20') having the ERC combined therewith; a lower-end coupling part (30') having the bellows combined therewith; and a displacement angle operating part (40'). The bellows has an insulating material layer and an anti-rust material layer formed thereon. The present invention provides effects of safely and swiftly performing a durability test of the QC, the DC, the ERC and the bellows of the durability test device of an LNG bunkering device, and providing the insulating material layer and the anti-rust material layer formed on the bellows.

Description

Durability test system of LNG bunker devic

The present invention relates to a durability test system of an LNG bunkering device, and the durability of the quick coupler (QC), disconnect coupling (DC), emergency separation coupling (ERC), and bellows of the durability test device of the LNG bunkering device. The test can be done safely and quickly, and the bellows is related to the durability test device of the LNG bunkering device in which a layer of insulation and rust prevention material is formed.

LNG-fueled ships are on the rise, and China, which is competing with the stagnant domestic shipbuilding industry, is also increasing the construction/operation of LNG-powered ships due to the expansion of emission control areas. As a result of the announcement of infrastructure expansion, government support for the revitalization of the LNG bunkering-based industry and the introduction of LNG bunkering in ports in Korea has resulted in the development of technologies for major equipment for bunkering for ships.

As an example of the prior art number of patents, according to the vessel bunkering apparatus of Patent Registration No. 10-1775472, in general, bunkering refers to the storage and transmission of marine fuel oil known as bunker oil, and the use of LNG has recently increased. Accordingly, the transmission and supply of liquefied natural gas (LNG) fuel is also included as bunkering.

As a prior art, according to the ship bunkering device of Korean Patent Registration No. 10-1775472, in general, a rail member installed in a bunkering ship;

a bunkering line installed along the rail member;

a manifold module installed movably along the rail member and having a fuel supply flow path connecting the bunkering line and a fuel line installed in a liquefied fuel vessel therein; and

Including; a driving unit that provides a moving driving force to the manifold module;

The bunkering line is connected to a liquefied fuel tank installed in the bunkering vessel, extends along the rail member, and a plurality of connector lines connected to the fuel supply passage are formed;

A position sensor for sensing the position of the manifold module is installed in the rail member at a position of the connector line, and a locking part fixed to the rail member at the position where the position sensor is installed is installed in the manifold module, and the locking part A ship bunkering device, which is a cylinder member installed in the manifold module and provided with a pressing part fixed to the rail member on a rod, is disclosed.

As another prior art, according to the liquefied gas supply system and method of a ship of Laid-Open Patent Publication No. 10-2017-0120862 No. 10-2017-0120862, a liquefied gas storage tank that is provided in a bunkering ship and stores liquefied gas; an unloading pump for pumping liquefied gas from the liquefied gas storage tank;

a first liquefied gas transfer line connected to the unloading pump and transferring the liquefied gas to an external vessel; and a heat exchanger provided in the first liquefied gas transfer line for cooling the pumped liquefied gas, characterized in that the liquefied gas is cooled in a bunkering vessel and supplied to the external vessel, liquefied gas of a ship The supply system is open.

However, in order to inject LNG fuel in the STS (Ship to Ship) method, the durability tests of the LNG bunkering devices, such as quick coupler (QC), disconnect coupling (DC), emergency separation coupling (ERC), and bellows, were performed safely. And it could not be done quickly, so there was a risk of an accident when applied to the field, and there was a disadvantage of causing unexpected failure.

Therefore, the present invention has been devised to solve the above problems, and the present invention is a quick coupler (QC), disconnect coupling (DC), emergency disconnect coupling (ERC), durability test of bellows (Bellows) safely and This can be done quickly, and the purpose of this is to provide a durability test system for an LNG bunkering device in which an insulating material and a rust preventive material layer are formed on the bellows.

The present invention relates to a durability test system for an LNG bunkering device, which is a durability test system for an LNG bunkering device to be connected to a vessel when refueling cryogenic LNG gas. In the durability test system of the LNG bunkering device in which the durability test device of the connect coupling (DC), emergency separation coupling (ERC), and bellows are integrally combined,

The durability test apparatus of the LNG bunkering system includes an upper fastening part 10' to which a quick coupler (QC) and a disconnect coupling (DC) are coupled, and a middle fastening part 20' to which an emergency separation coupling (ERC) is coupled. ), a lower fastening part 30' to which the bellows is coupled, and a displacement angle operation part 40'.

In addition, the bellows is characterized in that the insulating material and the rust preventive layer is formed.

Therefore, the present invention can safely and quickly perform durability tests of quick coupler (QC), disconnect coupling (DC), emergency separation coupling (ERC), and bellows of the durability test device of LNG bunkering equipment, The bellows has a remarkable effect in which a layer of insulation and anti-rust material is formed.

1 is a front view of an apparatus for durability testing of an LNG bunkering apparatus of the present invention;
Figure 2 is a plan view of Figure 1
Fig. 3 is a left side view of Fig. 1;
Figure 4 is a right side view of Figure 1;
5 is a state diagram in which the displacement angle operation part is operated to reduce the length and the bellows is deformed;
6 is a cross-sectional view of a quick coupling for refueling an LNG ship according to the present invention;
7 is a perspective view of a disconnect coupling device for refueling an LNG ship according to the present invention;
8 is a cross-sectional view of a disconnect coupling for refueling an LNG ship according to the present invention
9 is a cross-sectional view of a disconnect coupling device for refueling an LNG ship according to the present invention;
10 is an exploded cross-sectional view of a disconnect coupling device for refueling an LNG ship according to the present invention;
11 is a schematic diagram of a disconnect coupling device for refueling an LNG ship according to the present invention
12 is a cross-sectional view of the bellows of the present invention disconnect coupling for refueling of an LNG ship
13 is a cross-sectional view of the spacer of the disconnect coupling for refueling of an LNG ship of the present invention;

The present invention relates to a durability test system for an LNG bunkering device, which is a durability test system for an LNG bunkering device to be connected to a vessel when refueling cryogenic LNG gas. In the durability test system of the LNG bunkering device in which the durability test device of the connect coupling (DC), emergency separation coupling (ERC), and bellows are integrally combined,

The durability test apparatus of the LNG bunkering system includes an upper fastening part 10' to which a quick coupler (QC) and a disconnect coupling (DC) are coupled, and a middle fastening part 20' to which an emergency separation coupling (ERC) is coupled. ), a lower fastening part 30' to which the bellows is coupled, and a displacement angle operation part 40'.

In addition, the bellows 140 installed in the bunkering device 100 includes a pipe-shaped body 141 and a front end of the body 141 to be coupled to the emergency release coupling 110 or the disconnector 130 . It consists of a first connection part 142 and a second connection part 143 formed at the rear end of the body 141 and coupled to the hose 150, and the body 141 is shaped like a pipe, from the outside to the inside. The outer insulating material 141-1, the outer wrinkled portion 141-2, the inner insulating material 141-3, and the inner wrinkled portion 141-4 are formed in this order.

In addition, the bellows is characterized in that the insulating material and the rust preventive layer is formed.

The present invention will be described in detail with reference to the accompanying drawings as follows. 1 is a front view of the durability testing apparatus of the LNG bunkering apparatus of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a left view of FIG. 1, FIG. 4 is a right view of FIG. 1, and FIG. 6 is a cross-sectional view of a quick coupling for refueling an LNG ship of the present invention, FIG. 7 is a perspective view of a disconnect coupling device for refueling an LNG ship of the present invention, and FIG. 8 is a disconnect couple for refueling an LNG ship of the present invention. Ring cross-sectional view, Figure 9 is a cross-sectional view of the present invention LNG ship refueling disconnect coupling device, Figure 10 is an exploded cross-sectional view of the present invention LNG ship refueling disconnect coupling device, Figure 11 is the present invention LNG ship refueling disconnect couple A schematic diagram of the ring device, FIG. 12 is a cross-sectional view of a bellows of the disconnect coupling for refueling of an LNG ship of the present invention, and FIG. 13 is a cross-sectional view of a spacer of the disconnect coupling for refueling of an LNG ship of the present invention.

The present invention will be described in detail with reference to the accompanying drawings as follows.

The present invention relates to a durability testing device for an LNG bunkering device, and more particularly, to a QC/DC/ERC/Bellows durability testing device for connecting a vessel when refueling cryogenic LNG gas. QC/DC/ERC/Bellows can be installed in one piece, and the displacement angle is 15° and it is a device that can be operated 250,000 times.

The present invention is a C/DC/ERC/Bellows endurance test device, and it is a device capable of endurance test operation by integrating QC/DC/ERC/Bellows.

In addition, QC/DC/ERC/Bellows is integrated into a 15° displacement angle operation device.

In addition, it is combined with QC/DC/ERC/Bellows, and the displacement angle is 250,000 times of repeated operation.

The present invention is composed of ① upper fastening part ② middle fastening part ③ lower fastening part ④ displacement angle operation part.

The durability test apparatus is divided into 4 parts: ① upper fastening part ② middle fastening part, ③ lower fastening part, ④ displacement angle operation part.

The upper fastening part is designed so that QC or DC can be fastened, and there should be no movement during the durability test. The fastening part can change the jig according to the inch.

The middle fastening part is designed to allow ERC to be fastened, and care must be taken to avoid damage and fatigue failure of the braking bolt during the endurance test.

The lower fastening part was fastened using a blind flange as a moving fastening part for operating the bellows. It was made to be changeable according to the inch.

The angle of displacement operation part can be changed according to the cylinder, and it is possible to operate at a displacement angle of 15 degrees. Endurance test is performed 25,000 times, and operation can be measured up to 10,000 units.

The upper fastening part is DC fastened, the middle part fastening part is ERC fastened, and the lower part fastening part is connected to the bellow in the form of a blind flange to reciprocate according to the cylinder operation. ERC provides a safe and identifiable separation point within the LNG transportation system It serves to shut off the flow in the event of an emergency, such as a system or other modification of a transport system.

Therefore, in an emergency, the valve is closed and the ERC is separated, the downstream and upstream flow of LNG in the transmission system must be blocked, and the Flip-Flap valve mechanism in the ERC is immediately closed to minimize resource leakage and reduce losses.

And the release mechanism of the ERC limits the stress on the QC/DC connection part, and the compact and light design enables installation, maintenance and space utilization.

In other words, the present invention provides a durability test device for an LNG bunkering device to be connected when refueling cryogenic LNG gas to a ship, wherein the durability testing device for the LNG bunkering device is a QC/DC/ERC/Bellows durability testing device that is integrally coupled will be.

The QC/DC/ERC/Bellows durability test device consists of ① upper fastening part ② middle fastening part, ③ lower fastening part, ④ displacement angle operation part.

The upper fastening part is designed to be fastened by QC or DC, and there is no movement during the durability test, and the fastening part is capable of changing a jig according to inches.

The middle fastening part is designed to be fastened with ERC, and care must be taken to avoid damage and fatigue failure of the braking bolt during the durability test.

The lower fastening part was fastened using a blind flange as a moving fastening part for operating the bellows. It was made to be changeable according to the inch.

The angle of displacement operation part can be changed according to the cylinder, and it is possible to operate at a displacement angle of 15 degrees. Endurance test is performed 25,000 times, and operation can be measured up to 10,000 units.

The bunkering apparatus of the present invention is described as a whole. The bunkering apparatus is an apparatus for injecting LNG gas from a fuel tank outside a ship to a fuel tank of the ship.

The LNG gas is a cryogenic liquefied gas of -162 ℃.

The hose uses a cryogenic hose and is made of stainless steel, and when LNG gas flows into the hose, the hose is hardened.

The bunkering device 100 refuels the LNG gas stored in the fuel tank outside the ship to the fuel tank of the ship, and is installed at an inlet of the fuel tank and an outlet of the fuel tank outside the ship, respectively.

That is, the LNG gas stored in the fuel tank outside the ship is refueled from the fuel tank outside the ship to the fuel tank of the ship by a separately installed fuel supply pump, and bellows are respectively in the fuel tank outside the ship and the fuel tank of the ship. Since the bunkering device 100 is installed, it is possible to prevent the hardened hose from being destroyed due to shaking by waves and external impact while refueling LNG gas.

The bunkering device 100 is made of a hose 150 , a bellows 140 , an emergency release coupling 110 , a quick connector 120 , a disconnector 130 , a bellows 140 , and a hose 150 .

And the LMG gas is supplied in the direction in which the quick connector 120 and the disconnector 130 are installed in the emergency release coupling 110 .

The emergency release coupling 110 is a well-known and customary one in the prior art, to provide a safe and confirmed separation point within the bunkering device. The emergency release coupling is usually located between the hose and the manifold of the receiving vessel, and the emergency release coupling operates at cryogenic temperatures.

The quick connector 120 and the disconnector 130 are coupled to each other and are referred to as QCDC, also referred to as an LNG terminal. It is a device to cut off the LNG gas in an emergency situation.

That is, since it is dangerous if the LNG gas is immediately separated while unloading, the separation occurs after the LNG gas is shut off, and the pipe between the fuel tank of the ship and the fuel tank outside the ship is blocked with a ball valve.

After the LNG gas is cut off, the middle part is separated and one side is hung from the vessel and the other side is hung from the fuel tank outside the vessel.

In addition, the system for blocking and separating the LNG gas is a well-known and customary one, and since it is described in the emergency stop system for ships of Registered Patent Publication No. 10-0445323, a detailed description will be omitted.

On the other hand, the bellows 140 installed in the bunkering device 100 has a pipe-shaped body 141 and is formed at the front end of the body 141 to be stuck in the emergency release coupling 110 or disconnector 130 . It consists of a first connection part 142 and a second connection part 143 formed at the rear end of the body 141 and coupled to the hose 150 .

The body 141 has a pipe shape, from the outside to the inside in the order of an external insulating material 141-1, an external corrugated part 141-2, an internal insulating material 141-3, and an internal corrugated part 141-4. is done

The outer insulating material 141-1 and the inner insulating material 141-3 are made of nano-silica, and the outer wrinkled portion 141-2 and the inner wrinkled portion 141-4 are made of stainless steel.

The bellows is provided with external and internal insulating materials, so that when LNG gas passes through the bellows, it is cut off from room temperature to prevent expansion.

And, since the bellows has external and internal wrinkled parts, it is possible to absorb shaking caused by waves and external shocks, thereby preventing the destruction of the warped hose.

The first connection part 142 formed at the front end of the body 141 includes a fastening part 142-1 having a screw thread formed on its outer periphery, and a nut part 142- formed at the rear of the fastening part 142-1. 2) and a coupling part 142-3 formed at the rear of the nut part 142-2 and welded to the body 141.

The coupling part is formed to surround the outer periphery of the front end of the body, and the coupling part is coupled by welding while surrounding the outer periphery of the body.

The fastening part is screwed to the emergency release coupling 110 or the disconnector 130, and it is easy to couple by using a tool to the nut part formed at the rear of the fastening part.

And the second connection portion 143 formed at the rear end of the body 141 is formed in the second half of the grip portion 143-1, the grip portion 143-1 is formed to surround the outer periphery of the rear end of the body It consists of a flange part (143-2).

The grip part is formed to surround the outer periphery of the rear end of the body, and is coupled to the body by coupling a bolt to the rear surface of the grip part.

The bolt coupled to the rear end of the gripper is embedded in the internal insulation of the body, and the gripper is fixedly coupled to the rear end of the body.

The flange portion is formed in the form of a disk, a plurality of holes are radially formed. And a flange portion is also formed at the end of the hose, and after contacting the flange portion of the second connection portion with the flange portion of the hose, inserting a bolt into the hole and fastening the nut to the end of the bolt, the bellows and the hose will be connected

If the Quick Coupling of the STS (Ship to Ship) method for an LNG ship of the present invention is described, it is a Quick Coupling that satisfies 0.01% airtightness at an LNG cryogenic temperature. It is also a quick coupling that satisfies the 1.5 MPa internal pressure at cryogenic LNG temperature.

The present invention is a STS (Ship to Ship) type Quick Coupling device for LNG ships, which is quickly combined when refueling an LNG ship STS to minimize time consumption, and secures durability, airtightness, and stable ship in a cryogenic environment.

Quick Coupling is mainly represented in 3 parts and consists of ①Body part, ②Disc part, ③Bush part. It is not the final design considering the cryogenic environment, but the design considering leakage, withstand pressure, and durability first. The O-ring on the connection part connected to the ERC is deformed when pressure is applied to prevent the gap. The sealing between the disk and the body minimizes fluid leakage and minimizes friction in the fluid connection part.

The upper part of the body part consists of a method of fastening with three grooves, and this is a design considering the rotation radius of the disk when fastening with DC. The body shape considers disk leakage, fluid flow, and processing assembly.

The disc part, which controls the movement of fluid, consists of a stem and a spring, and the disc opens and closes by the force of the spring to allow the fluid to move. In Quick Coupling, the disc is always closed by spring force, and when it is connected to the disconnect coupling, the disc of the disconnect coupling is pushed and opened and closed when the disc is fastened.

The bush part plays a role in supporting the fixation of the disc and reflects durability and fluid flow as much as possible.

That is, in the quick coupling for refueling of an LNG ship of the present invention, a disk 2' is installed in the front of the inside, which is the inlet side of the body 1', and a stem 3' is coupled to the rear of the disk 2'. , one end of the coil spring 9' is coupled to the rear of the stem 3', the other end of the coil spring 9' is coupled to one end of the spring guide 8' at the rear, and the other end of the spring guide 8' is It is inserted outside the rear bush (7'), and the bush (7') is coupled to the rear of the body (1').

The bush 7' and the body 1' are coupled by a wrench bolt 6', and a capsule O-ring 4 is installed between the body and the disk to maintain airtightness.

In addition, a seal (U-Seal) 5' is installed in front of the disk 2' to maintain airtightness.

And the spring guide (8') of the present invention has a cylindrical front and a larger diameter at the rear, and a flange is formed, and the rear end of the flange is inserted outside the flange protruding in front of the bush.

If the present invention describes the Dry Disconnect Coupling of the STS (Ship to Ship) method for an LNG ship, it is a Dry Disconnect Coupling that satisfies 0.01% airtightness at an LNG cryogenic temperature. In particular, it is a dry disconnect coupling that satisfies 1.5 MPa withstand pressure at cryogenic LNG temperatures.

That is, the present invention is a STS (Ship to Ship) type Dry Disconnect Coupling device for an LNG ship, which is quickly combined when refueling an LNG ship STS to minimize time consumption, and secures durability, airtightness, and stable ship in a cryogenic environment.

Dry Disconnect Coupling can be divided into ①Body part, ②Connector part, ③Disc part. Airtightness and friction were considered by applying U-Seal to the body part, connector part, and disc holder. It consists of 3 grooves that can be fastened to QC inside the upper part of the body, and the disc is opened and closed while the disc plate and body rotate by turning the handle at the same time as fastening. In order to open and close the disc while the disc plate rotates spirally, a space is required for the guide pin to move spirally in the body.

It is located on the back of the body and serves as a fixing part for connection like the disc holder. It should be designed in close contact with the body so that it does not move by considering air tightness and friction. On the inside, a U-Seal with a small friction coefficient and a wide pressure range was applied. O-Ring for airtightness was applied to the outer part.

Disc and Disc Holder play a role of opening/closing DC and QC, and as the Holder is combined with QC, it is fixed in 3 grooves. After fastening, the disc is opened and closed by rotating the body, pushing the disc of QC to open and close both sides at the same time so that the fluid can pass. The 3 grooves of the holder should be the same as the QC, and there should be no flow when fastening. The holder should fix the disc plate and allow the disc to move vertically as the body rotates. O-ring was applied to the disc to secure airtightness, and a U-Seal was applied to the outside of the holder to reduce the friction coefficient and increase the pressure range.

The spacer is arranged in a circular ring shape with a hole in the center, respectively, and serves to hold and fix both ends of the wave washer.

And the inner heat insulating material 141-3 of the bellows is a nano-silica material, the outer wrinkled portion 141-2 and the inner wrinkled portion 141-4 are made of stainless steel, and the heat insulating material is 0.023w/mk, so that the inner The surface temperature of the wrinkle part is -162℃, and the surface temperature of the outer wrinkle part is 20℃, which is room temperature. And a rust preventive layer is formed on the insulating material layer. The composition of the rust preventive layer is applied after stirring by mixing 20 to 50 parts by weight of glass powder and 5 to 10 parts by weight of aluminum powder with respect to 100 parts by weight of the epoxy resin. And the present invention can form a rust-preventing and heat-insulating layer by mixing the nano-silica material and the rust-preventing composition together. At this time, the composition is applied after stirring by mixing 50 to 60 parts by weight of nano silica powder, 20 to 30 parts by weight of glass powder, and 2 to 5 parts by weight of aluminum powder with respect to 100 parts by weight of the epoxy resin.

And in the present invention, the bellows 140 can be configured by connecting both ends of the two bellows with bolts. When a length longer than the extended length is required, the length can be adjusted by rotating the turnbuckle.

And a length sensor is installed in the bellows, and transmits the length displacement as a signal to the control unit, the control unit can record the length change, and when the set length or more is displaced, the alarm means is operated to make a sound.

100: bunkering device 110: emergency release coupling (emergency separation coupling)
120: quick connector 130: disconnector
140: bellows 141: body
141-1: external insulation 141-2: external corrugation
141-3: inner insulation 141-4: inner wrinkle part
142: first connection part 142-1: fastening part
142-2: nut part 142-3: coupling part
143: second connection part 143-1: grip part
143-2: flange part
150: hose 160: cylinder
1 : Body 2 : Connector Connector
3 : Disc Holder Disc Holder 4 : Disc Disc
5 : Disc Plate 6 : Guide Pin
7: Guide Ring 8: Pin
9: Spacer 10: Guide
11: Bearing 12: Bolt
13: Ring Ring 14: Hexa socket head bolt HEX. Socket Head Bolt
15: O-Ring O-Ring 16: Capsule O-Ring
17: U-seal 18: U-seal
19: Ball 20: Hex nut HEX. Nuts
21: HandleHandle 22: Wave Washer
23: Hex socket head bolt HEX. Socket Head Bolt
24: Split Pin
1' : Body 2' : Disc
3': Stem 4': Capsule O-Ring
5' : U-Seal 6' : Wrench Bolt
7' : Bush 8' : coil spring guide
9': coil spring
10': upper fastening part 20': middle fastening part
30': lower fastening part 40': displacement angle operation part

Claims (2)

A durability test system for an LNG bunkering device to be connected when refueling cryogenic LNG gas to a ship. , In the durability test system of the LNG bunkering device in which the durability test device of bellows is integrally combined,
The durability test device of the LNG bunkering system includes an upper fastening part 10' to which a quick coupler (QC) and a disconnect coupling (DC) are coupled, and a middle fastening part 20' to which an emergency separation coupling (ERC) is coupled. ), a lower fastening part 30' to which the bellows is coupled, and a displacement angle operation part 40', and an insulating material layer and a rust preventive material layer are formed on the bellows. system According to claim 1, wherein the bellows 140 installed in the bunkering device 100 is a pipe-shaped body 141, is formed at the front end of the body 141, the emergency release coupling 110 or the disconnector 130 ) and a first connection part 142 coupled to, and a second connection part 143 formed at the rear end of the body 141 and coupled to the hose 150, the body 141 being in the shape of a pipe, Durability test of an LNG bunkering device, characterized in that it consists of an external insulating material 141-1, an external corrugated part 141-2, an internal insulating material 141-3, and an internal corrugated part 141-4 from the outside to the inside system

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