KR20230099765A - Gas feeding system of ship engine - Google Patents

Abstract

The present invention compacts a fuel supply system for supplying fuel at a constant pressure and flow rate to the ship engine 40 while maintaining the temperature of the fuel gas supplied to the ship engine at a constant temperature, so that the installation on the ship is easy and the fuel supply It relates to a fuel supply system for a marine engine with excellent performance, a storage tank 10 for supplying fuel to the marine engine 40, and fuel supplied from the storage tank 10 to the fuel supply condition of the marine engine 40 In the fuel supply system of a marine engine composed of a fuel supply unit 20 that converts to fit and a gas valve unit 30 that supplies the converted fuel to the marine engine 40, the fuel supply unit 20 and the gas valve unit It includes a first double pipe (100a) for moving fuel between (30) and a second double pipe (100b) for moving fuel to the gas valve unit 30 and the marine engine 40, wherein the first The double pipe 100a and the second double pipe 100b are composed of an inner pipe 110 for moving fuel and an outer pipe 120 surrounding the inner pipe 110 and forming a space S therebetween. Air circulates in the spaces S respectively formed in the first double pipe 100a and the second double pipe 100b.

Description

Fuel supply system of ship engine {GAS FEEDING SYSTEM OF SHIP ENGINE}

The present invention relates to a fuel supply system for a marine engine, and more specifically, to a compact fuel supply system for supplying fuel to a marine engine at a constant pressure and flow rate while maintaining a constant temperature of fuel gas supplied to the engine. It relates to a fuel supply system for a marine engine that is easy to install on a ship and has excellent fuel supply.

As the International Maritime Organization (IMO) regulations on emissions of greenhouse gases and various air pollutants become stricter, the shipbuilding and shipping industry uses natural gas, a clean energy source, as fuel for ships instead of using heavy oil and diesel oil, which are conventional fuels. It is becoming more and more.

In addition, when natural gas such as liquefied natural gas (LNG) is used as a ship's fuel, a high-pressure gas injection engine (eg, ME-GI engine) and a low-pressure engine (X-DF) are used as the ship's engine. , DFDE and ME-GA engines) may be applied.

Ships using the ME-GI engine require a high-pressure gas supply pressure of about 300 Bar, and accordingly, fuel gas of the pressure required by the high-pressure gas injection engine is generated, and even in the case of a low-pressure engine, only the pressure is 6-16 The principle of driving with a bar includes the same fuel gas supply system as the high-pressure engine.

In addition, in order for a marine engine to use high-pressure natural gas as fuel, the pressure and temperature conditions required by the engine must be matched. So control is important.

1. Republic of Korea Patent Registration No. 10-1873780 (Fuel Supply System for Ships) 2. Republic of Korea Patent Registration No. 10-1825605 (Fuel supply device for ships)

Accordingly, an object of the present invention is to solve the problems according to the prior art, and the gas valve unit (GVU or GVU or It is intended to provide a fuel supply system for a marine engine including a gas regulating unit (GRU).

An embodiment of the present invention is a fuel supply system for a marine engine, a storage tank for supplying fuel to the marine engine, a fuel supply unit for converting fuel supplied from the storage tank to suit the fuel supply conditions of the marine engine, and the converted fuel In the fuel supply system of a marine engine composed of a gas valve unit supplied to the marine engine, a first double pipe for moving fuel between the fuel supply unit and the gas valve unit, and moving fuel to the gas valve unit and the marine engine It includes a second double pipe, wherein the first double pipe and the second double pipe consist of an inner pipe for moving fuel and an outer pipe for forming a space between the inner pipe and surrounding the inner pipe.

On the other hand, the pipe structure included in the gas valve unit may be provided with a double pipe having the same shape as the double pipe connected to the fuel supply unit, and a first double pipe is connected between the fuel supply unit and the gas valve unit and the gas valve unit In this case, the fuel gas supplied through the double pipe can increase fuel efficiency by controlling the temperature of the circulating air in the double pipe.

Therefore, in the fuel supply system of the marine engine according to an embodiment of the present invention, the double pipe of the fuel supply is stable and the fuel gas is supplied at a constant temperature, and the fuel gas is efficiently supplied through the fuel supply line to the marine engine. let it bear

In addition, the temperature of the air circulated through the double pipe ventilation fan or exhaust fan constituting the fuel supply system of the marine engine of the present invention can be adjusted, so that the fuel gas is supplied at a temperature with good fuel efficiency. can supply

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing a fuel supply system for a marine engine according to an embodiment of the present invention.
Figure 2 is a schematic configuration diagram showing a fuel supply system for a marine engine according to an embodiment of the present invention.
Figure 3 is a perspective view (a) and an internal cross-sectional view (b) of a space installation installed in the space of the first and second double pipes in the fuel supply system of the marine engine according to an embodiment of the present invention.
4 is a perspective view of a first support part (a) and a perspective view of a connection part (b) of components of a spacer in a fuel supply system for a marine engine according to an embodiment of the present invention.
Figure 5 is a partial cross-sectional view showing a state in which a connection part having a different shape of the spacer and the third support part are coupled in the fuel supply system of the marine engine according to an embodiment of the present invention.

The present invention will be described in detail with reference to the accompanying drawings. Here, repeated descriptions, well-known functions that may unnecessarily obscure the subject matter of the present invention, and detailed descriptions of configurations are omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clarity.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

In addition, the term "unit" described in the specification means a unit that processes one or more functions or operations, which may be implemented as hardware or software or a combination of hardware and software.

Hereinafter, a preferred embodiment of a fuel supply system for a marine engine according to the present invention will be described in detail with reference to the accompanying drawings.

A fuel supply system for a marine engine according to an embodiment of the present invention, as shown in FIGS. In the fuel supply system of a marine engine composed of a fuel supply unit 20 that converts according to the fuel supply conditions of the marine engine 40 and a gas valve unit 30 that supplies the converted fuel to the marine engine 40, A first double pipe 100a for moving fuel between the fuel supply unit 20 and the gas valve unit 30, and a second double pipe for moving fuel between the gas valve unit 30 and the ship engine 40 (100b),

The first double pipe 100a and the second double pipe 100b are an inner pipe 110 that moves fuel and an outer pipe 120 that surrounds the inner pipe 110 and forms a space S therebetween. made up of

Here, the pipe structure included in the fuel supply unit 20 and the gas valve unit 30 may be provided with a second double pipe 100b having the same shape as the first double pipe 100a, and the fuel supply unit 20 And the first double pipe (100a) is connected between the gas valve unit 30 and connected to the second double pipe (100b) between the gas valve unit 30 and the ship engine 40, at which time the first double pipe ( 100a) is associated with the second double pipe (100b).

And, as shown in FIG. 1, in the first and second double pipes 100a and 100b for moving fuel while being connected between the storage tank 10 and the marine engine 40, the inner pipe 110 and the outer pipe An air supply line 50 is provided on one side of the outer pipe 120 of the first double pipe 100a to move the heated air to the space S between the 120,

An air heating device 60 connected to one end of the air supply line 50 to heat air is provided,

A blowing device 80 connected in series or parallel structure is provided at one end of the air moving line 70 for supplying air to the air heating device 60.

In a ship that is a conventional LNG carrier, liquid NG is stored in the storage tank 10, and the liquid LNG stored in the storage tank 10 is transferred to the first and second double pipes 100a by a high pressure pump or differential pressure. It is supplied to the ship engine 40 through the inner tube 110 of (100b), and at this time, in the form of a double tube, which is a structure in which an outer tube 120 accommodating the inner tube 110 is formed in the longitudinal direction of the inner tube 110 An empty space (S) is formed between the outer circumferential surface of the inner tube 110 and the inner circumferential surface of the outer tube 120, and the LNG fuel supplied from the storage tank 10 while the heated air is moved to the space (S) is vaporized from a liquid to a gas through a vaporizer, and the ambient temperature of the inner tube 110 to which the vaporized gas is supplied and moved is heated to an appropriate temperature so that the vaporized gas is maintained and supplied at a constant temperature.

At this time, it is preferable that the temperature of the vaporized gas of LNG injected into the ship engine 40 is about 20 ° C., and the outside air is moved through the air heating device 60 by the blower 80 The external air introduced into the air movement line 70 is heated, and the heated air heated by the air heating device 60 passes through the air supply line 50 to the air between the inner tube 110 and the outer tube 120. Heating air is circulated in the space (S).

Hereinafter, each component of the fuel supply system will be described in detail.

1 to 2, the storage tank 10 is connected to the fuel supply unit 20 and the gas valve unit 30 by a first fuel supply line, and the first double pipe 100a and the second double pipe 100a. Fuel is supplied toward the ship engine 40 through the pipe 100b. The fuel is stored in a liquefied state in the storage tank 10 .

The fuel supply unit 20 may change the pressure, temperature, state, and the like of the fuel supplied from the storage tank 10 according to the fuel supply conditions of the ship engine 40.

To this end, the fuel supply unit 20 may include various means such as, for example, a plurality of compressors, coolers, and heat exchangers, and converts the pressure, temperature, state, etc. of the fuel to suit the fuel supply conditions of the marine engine 40. Since the configuration method and operation contents of the means are variously disclosed in conventional open literature, a detailed description thereof will be omitted.

Most of the fuel that has passed through the fuel supply unit 20 can be converted into a gaseous state, and the gas valve unit 30 supplies the fuel that has passed through the fuel supply unit 20 to the marine engine 40, for example, the marine engine ( 40) may include means for adjusting the flow rate of fuel, cutting off or allowing fuel, adjusting the pressure of fuel, controlling the movement path of fuel, and the like, according to the fuel supply conditions of 40).

Two or more blower devices 80 may be installed in parallel or may have a structure in which one blower device 80 is directly connected. Air heating device 60 by reducing the movement speed of external air moved from the blower 80 to the air movement line 70 connected to the air heating device 60 before or after flowing into the air heating device 60 While moving the air to the air supply line 50 as heating air completely heated by the hair heating device 60, it is introduced into the space S of the first double pipe 100a and introduced into the first, It circulates through the space (S) of the two double pipes (100a, 100b).

In addition, although not shown in the drawings, in addition to the above-described structure in which the heated air circulates in the space between the inner pipe 110 and the outer pipe 120, when fuel leaks through the inner pipe 110, the blower 80 ) may further include the following structures in addition to the method of forcibly sucking or circulating the air containing the fuel leakage gas and removing it outside the ship.

An inert gas supply unit (not shown) for supplying an inert gas, provided in at least one of the first double pipe 100a and the second double pipe 100b, the first double pipe 100a and the second double pipe 100b A sensor unit (not shown) for detecting the first fuel leaked into the space (S) between the inner tube 110 and the outer tube 120, and when the leak of fuel is detected by the sensor unit, inert gas supply and a control unit (not shown) for supplying an inert gas to the space through the unit.

In addition, the fuel supply system is pushed by the pressure of the inert gas supplied to the space (S) between the inner pipe 110 and the outer pipe 120 of the first double pipe 100a and the second double pipe 100b. It may include a catalytic reaction unit (not shown) that receives the leaked fuel and reacts with the catalyst to convert it into harmless components.

When fuel leaks into the space between the inner pipe 110 and the outer pipe 120 of the first double pipe 100a and the second double pipe 100b, the inert gas supply unit passes through the inert gas supply line to the corresponding space. supply inert gas. This is to prevent an explosion due to combustible components of the fuel leaking into the space S between the inner pipe 110 and the outer pipe 120 of the first double pipe 100a and the second double pipe 100b. . The inert gas may include nitrogen or the like, and the gas component of the fuel pushed by the pressure of the supercharged inert gas may be moved to the catalytic reaction unit, and the liquid component of the fuel may be moved to a drain tank (not shown).

The sensor unit may be provided with one or more of the above-described first double pipe (100a) and the second double pipe (100b), and the inner pipe 110 of the first double pipe (100a) and the second double pipe (100b) and Fuel leaking into the space (S) between the outer tubes (120) is detected. Specifically, the sensor unit may be provided in the second double pipe (100b) connecting the gas valve unit 30 and the ship engine 40, and another sensor unit is connected to the fuel supply unit 20 and the gas valve unit 30. 1 may be provided in the double pipe (100a).

The sensor unit may, for example, detect fuel leaking into the space S between the inner pipe 110 and the outer pipe 120 of the first double pipe 100a and the second double pipe 100b, so that a part of the sensor is external. It may be provided to protrude toward the corresponding space while being fixed to the tube 120.

The controller may control each component of the fuel supply system. For example, the controller detects leakage of fuel in the space S between the inner tube 110 and the outer tube 120 of the first double pipe 100a and the second double pipe 100b by one or more of the sensor units. In this case, the inert gas supply unit may be operated so that the inert gas is supplied to the corresponding space.

At this time, the controller opens the valve on the inert gas supply line. Through this, the inert gas supplied to the space (S) between the inner pipe 110 and the outer pipe 120 of the first double pipe (100a) and the second double pipe (100b) leaked into the corresponding space (S). Explosion due to combustible components of fuel can be prevented.

In addition, the controller includes an input unit for inputting the set temperature, set time, and set mode of the air heating device 60 and a display unit for displaying the set temperature, set mode, and set time of the input unit. The operation is controlled, and the operating state of the blower 80, which blows air while being driven by the input signal of the input unit, is monitored and controlled through a flow rate sensor, a pressure sensor, and a temperature sensor.

In addition, while maintaining the space area between the inner pipe 110 and the outer pipe 120 constituting the first and second double pipes 100a and 100b as it is, the residence time during the movement of the heating air is maintained so that the temperature is uniform The following structure is further included so that the space can be moved with .

As shown in FIGS. 3 and 4, the space S between the inner tube 110 and the outer tube 120 of the first double pipe 100a and the second double pipe 100b is equally spaced in the longitudinal direction. A plurality of spacers 500 are disposed,

In the spacer 500, the inner circumferential surface is closely fixed to the outer circumferential surface of the inner tube 110, and the first coupling part 511 having first coupling holes 512 penetrating both sides while protruding connected to one surface of the outer circumference is formed on the outer circumferential surface. A plurality of ring-shaped first support parts 510 formed at equal intervals;

It is provided in a symmetrical form on both sides of the first support part 510, and the outer circumferential surface is closely fixed to the inner circumferential surface of the outer tube so as to correspond to the position of the first coupling part 511. A ring-shaped second support portion 520 in which a plurality of second coupling portions 521 having two coupling holes 522 are formed at equal intervals on the inner circumferential surface;

Upper and lower fitting protrusions 531-1 are formed at both ends of the first support portion 510 and the second support portion 520 so as to cross each other and be connected obliquely, and fitting grooves between the fitting protrusions 531-1 ( 531-2) are provided, and a connecting portion 530a is formed with a connecting base 532 inclined at a predetermined angle between the fastening portion 531a and the fastening portion 531b. have a structure

The spacer 500 deforms the space S between the outer tube 120 and the inner tube 110 by the temperature difference between the heated air moving into the space S and the fuel moving through the inner tube 110. While controlling the temperature of the heating air in the space (S) can be maintained uniformly through the dispersion and mixing of the heating air moving to the space (S).

In addition, the spacer 500 is formed so that the second support 520 in a mutually symmetrical form is spaced apart from the first support 510 at the center, and the first support 510 and the second support 520 are formed on both sides. ) has an integral coupling structure consisting of a connecting portion 530a connecting radially between them.

The first support part 510 has a cylindrical shape in which an inner circumferential surface is tightly fixed to the outer circumferential surface of the inner tube 110, and a plurality of first coupling parts 511 are formed on the outer circumferential surface of the first support part 510 at equal intervals, First coupling holes 512 penetrating both sides are formed while connecting and protruding from one surface of the outer circumference of the first support portion 510. Specifically, the first support portion 510 has a tetrahedral shape and corresponds to the width of the first support portion 510 on both sides. A first coupling hole 512 having a square cross section penetrating through the center is formed.

The second support part 520 is spaced apart at equal intervals on both sides of the first support part 510, has a width corresponding to the width of the first support part 510, and is provided on the inner circumferential surface of the outer tube 120. The outer circumferential surface of the second support part 520 is fixed in a cylindrical shape, and the second coupling part 521 connects to one inner circumferential surface of the second support part 520 to correspond to the position of the first coupling part 511 and penetrates both sides while protruding. A plurality of second coupling portions 521 having second coupling holes 522 are formed at regular intervals on the inner circumferential surface, and at this time, the first coupling portion 511 and the second coupling portion 521 have the same shape and size. have

The connecting part 530a is a body composed of fastening parts 531a and 531b at both ends and a connecting rod 532 connecting between the fastening parts 531a and 531b, and is connected to the first support part 510 and the first supporting part 510. The two support parts 520 are connected at an angle across each other, and the fastening parts 531a and 531b are recessed inward between the fitting protrusions 531-1 as fitting protrusions 531-1 are formed on the upper and lower sides, respectively. A fitting groove 531-2 is formed, and at this time, when the fastening part 531a is coupled to the second coupling part 521 of the second support part 520, the upper fitting protrusion 531-1 forms the second coupling part 521. While being inserted into the second coupling hole 522 of the ), the fitting groove 531-2 is sandwiched between the second coupling hole 522 and the exposed surface of the second coupling portion 521, thereby exposing the second coupling portion 521. The lower fitting protrusion 531-1 is located on the outer side of the surface and is tightly inserted and coupled. -1) is inserted into the first coupling hole 512 of the first coupling portion 511, and the fitting groove 531-2 moves between the first coupling hole 512 of the first coupling portion 511 and the exposed surface. While being inserted, the upper fitting protrusion 531-1 is located on the outer side of the exposed surface of the first coupling part 511, so that it is closely inserted and coupled.

In addition, the spacer 500 is a portion where the first and second double pipes 100a and 100b are connected to the fuel supply unit 20 or the first and second double pipes 100a to the gave valve unit 30 ( 100b) may be installed at a portion connected, and the installation position of the spacer 500 is not limited thereto, and one or more in the space S of the first and second double pipes 100a and 100b. Can be installed at equal intervals.

In addition, as shown in FIG. 5, the first support part 510 of the spacer 500 is not installed, and the ring-shaped coupling pipe 541 whose inner circumferential surface is tightly fixed to the outer circumferential surface of the inner circumferential pipe 110 and It consists of a connecting pipe 542 connected to both ends of the coupling pipe 541 in a mutually symmetrical form and having a plurality of connecting holes 542-1 formed at equal intervals on the outer circumferential surface as the diameter gradually increases toward the outside of the coupling pipe 541. A third support part 540 is installed,

A connection part 530b is provided to connect and fix the third support part 540 and the second support part 520, and one end of the connection part 530b is attached to the second coupling part 521 of the second support part 520. The fastening part 531a and the other end of the connecting part 530b to be fitted are formed with a fastening bar 533 extending to a predetermined horizontal length to be inserted into the connecting hole 542-1 of the connecting pipe 542. While being screwed to the end of the fastening bar 533 passing through the connection hole 542-1 of the connection pipe 542 on one side of the 3 support part 540, the connection hole 542-1 of the connection pipe 542 on the other side passes through. It has a structure in which a turnbuckle 534 screwed to the end of the fastening bar 533 is installed.

The spacer 500 has a third support part 540 in the center and a second support part 520 spaced apart on both sides of the third support part 540, so that the second support part 520 and the third support part 540 The connecting portion 530b is coupled and fixed between them.

As described above, the shape and structure of the second support part 520 are arranged spaced apart at equal intervals on both sides of the third support part 540, and the outer circumferential surface of the second support part 520 closely adheres to the inner circumferential surface of the outer tube 120. As a fixed cylindrical shape, the second coupling part 521 connects to one surface of the inner circumference of the second support part 520 so as to correspond to the position of the connection hole 542-1 of the connection pipe 542 and protrudes through both sides. A plurality of second coupling portions 521 having coupling holes 522 are formed at regular intervals on the inner circumferential surface.

The third support part 540 is a body in which a central coupling pipe 541 and both ends of the coupling pipe 541 are connected and a symmetrical connection pipe 542 is formed, and the coupling pipe 541 is an inner pipe. It is a cylindrical shape in which the inner circumferential surface is closely fixed to the outer circumferential surface of (110), and the coupling pipe 542 is connected to the outer circumferential end of the coupling pipe 541, and the diameter gradually increases toward the outside of the coupling pipe 541. The other side opposite to one side connected to the outer circumference has an open shape, and a plurality of connecting holes 542-1 are formed at equal intervals on the inclined outer circumferential surface.

The connecting part 530b is formed of a fastening part 531a at one end and a fastening bar 533 at the other end, and a connecting rod 532 inclined at a predetermined angle between the fastening part 531a and the fastening bar 533 is formed. As a body, the fastening part 531a has fitting protrusions 531-1 on the upper and lower sides, respectively, like the above-described connection bar 530a so as to be fitted to the second coupling part 521 of the second support part 520. As it is formed, a fitting groove 531-2 recessed inward between the fitting protrusions 531-1 is formed, and at this time, when the fastening part 531a is coupled to the second coupling part 521 of the second support part 520, the upper side As the fitting protrusion 531-1 is inserted into the second coupling hole 522 of the second coupling portion 521, the fitting groove 531-2 is connected to the second coupling hole 522 of the second coupling portion 521. While being sandwiched between the exposed surfaces, the lower fitting protrusion 531-1 is located outside the exposed surface of the second coupling part 521 and closely inserted and coupled, and the fastening bar 533 is connected to the connecting hole of the connecting pipe 542 ( 542-1) is extended to a predetermined horizontal length to be inserted into the coupling pipe 541, and is located outside the outer circumferential surface of the coupling pipe 541, and the connection hole of one side connection pipe 542 among the connection pipes 542 on both sides of the third support part 540. Turnbuckle 534 screwed to the end of the fastening bar 533 passing through the connection hole 542-1 of the other connector 542 while being screwed to the end of the fastening bar 533 passing through (542-1) is installed

The rotation of the turnbuckle 534 narrows or widens the gap between the fastening bars 533 on both sides screwed into the turnbuckle 534, so that the connection part 530b is firmly fixed and coupled between the second support part 520 and the third support part 540. It becomes.

Although specific embodiments of the present invention have been shown and described above, the technical idea of the present invention is not limited to the accompanying drawings and the above description, and various forms of modification are possible without departing from the spirit of the present invention. It is obvious to those of ordinary skill in the art, and variations in this form will be considered to fall within the scope of the claims of the present invention within the scope that does not violate the spirit of the present invention.

Storage tank 10 Fuel supply unit 20 Gas valve unit 30
Marine engine 40 Air supply line 50 Air heating device 60
Air movement line 70 Blower 80 First double piping 100a
2nd double pipe 100b inner pipe 110 outer pipe 120
Spacer 500 First support part 510 First coupling part 511
Second support part 520 second coupling part 521 connection part 530a, 530b
Fastening part 531a, 531b connecting rod 532 fastening bar 533
Turnbuckle 534 Third support 540 Coupling pipe 541
connector 542

Claims (3)

A storage tank 10 for supplying fuel to the marine engine 40, a fuel supply unit 20 for converting the fuel supplied from the storage tank 10 to suit the fuel supply conditions of the marine engine 40, and the converted In the marine engine fuel supply system composed of a gas valve unit 30 for supplying fuel to the marine engine 40,
A first double pipe 100a for moving fuel between the fuel supply unit 20 and the gas valve unit 30, and a second double pipe for moving fuel between the gas valve unit 30 and the ship engine 40 (100b),
The first double pipe 100a and the second double pipe 100b are an inner pipe 110 that moves fuel and an outer pipe 120 that surrounds the inner pipe 110 and forms a space S therebetween. The fuel supply system of the marine engine, characterized in that air circulates in each space (S) of the first double pipe (100a) and the second double pipe (100b) while being made of. According to claim 1,
A plurality of spacers 500 at equal intervals in the longitudinal direction of the space S between the inner tube 110 and the outer tube 120 of the first double pipe 100a and the second double pipe 100b, respectively are placed,
In the spacer 500, the inner circumferential surface is closely fixed to the outer circumferential surface of the inner tube 110, and the first coupling part 511 having first coupling holes 512 penetrating both sides while protruding connected to one surface of the outer circumference is formed on the outer circumferential surface. A plurality of ring-shaped first support parts 510 formed at equal intervals;
It is provided in a symmetrical form on both sides of the first support part 510, and the outer circumferential surface is closely fixed to the inner circumferential surface of the outer tube so as to correspond to the position of the first coupling part 511. A ring-shaped second support portion 520 in which a plurality of second coupling portions 521 having two coupling holes 522 are formed at equal intervals on the inner circumferential surface,
Upper and lower fitting protrusions 531-1 are formed at both ends of the first support portion 510 and the second support portion 520 so as to cross each other and be connected obliquely, and fitting grooves between the fitting protrusions 531-1 ( 531-2) are provided, and a connecting portion 530a is formed with a connecting base 532 inclined at a predetermined angle between the fastening portion 531a and the fastening portion 531b. Marine engine fuel supply system, characterized in that being. According to claim 2,
The first support part 510 of the spacer 500 is not installed, and the inner circumferential surface of the inner circumferential tube 110 is closely fixed to the ring-shaped coupling tube 541 and both ends of the coupling tube 541. A third support part 540 composed of a connecting pipe 542 having a plurality of connecting holes 542-1 formed at equal intervals on the outer circumferential surface is installed as the diameter gradually increases toward the outside of the coupling pipe 541 connected in a mutually symmetrical form. become,
A connection part 530b is provided to connect and fix the third support part 540 and the second support part 520, and one end of the connection part 530b is attached to the second coupling part 521 of the second support part 520. The fastening part 531a and the other end of the connecting part 530b to be fitted are formed with a fastening bar 533 extending to a predetermined horizontal length to be inserted into the connecting hole 542-1 of the connecting pipe 542. While being screwed to the end of the fastening bar 533 passing through the connection hole 542-1 of the connection pipe 542 on one side of the 3 support part 540, the connection hole 542-1 of the connection pipe 542 on the other side passes through. A fuel supply system for a marine engine, characterized in that a turnbuckle 534 screwed to the end of the fastening bar 533 is installed.

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