KR20130085378A - Connection flange for a high pressure conduit - Google Patents

Abstract

PURPOSE: A connection flange for a high pressure conduit is provided to prevent welding waste and welding spatters inside a tube because an inner tube is welded on a proximal surface of the flange and the outer tube is welded from a distal surface of the flange. CONSTITUTION: A connection flange (60) for a high pressure conduit comprises a flange body (61) and at least one welding recess. The flange body comprises a proximal surface (62) and a distal surface. In order to fix an inner tube to the flange, a central hole (70) of the flange body is formed same as the shape and size of the end (81) of the inner tube. The inner tube is extended from the distal surface. Both sides of the central hole are opened. The welding recess is formed to widen the central hole and is opened toward the proximal surface. The welding recess provides a space for a welding part between the end of the inner tube and the flange.

Description

CONNECTION FLANGE FOR A HIGH PRESSURE CONDUIT

The present invention relates to a flange and a flange / tube assembly for the connection of high pressure piping for a high pressure connection for a crosshead type large low speed single flow turbocharged two-stroke diesel engine. The invention also relates to a method of making a high pressure conduit.

Large two-stroke diesel engines of the crosshead type are typically used in propulsion systems of large ships or as main prime movers in power plants. In general, these engines are operated with heavy oil or fuel oil.

Recently, there is a need for large two-stroke diesel engines that can handle alternative types of fuels, such as coal slurries containing hard particles, petroleum coke, etc., but also for clean fuels such as DME, between the plunger and barrel There is a need for a system for preventing seizures. In order to avoid clogging and not clogging the fuel supply system, such fuel needs to be maintained, heated and pressurized to the engine cylinder at high pressure. For example, another fuel used in gas carriers such as LNG carriers is liquefied natural gas. This gas needs to be maintained at high pressure. When fuel is used in large two-stroke diesel engines of the crosshead type, LNG must also be supplied to the engine under very high pressure.

In addition, in large two-stroke diesel engines of the crosshead type, there are many high pressure systems such as cylinder lubrication systems, intake and exhaust valve actuation systems and fuel valve actuation systems.

In marine vessels, a risk arises when a leak occurs in such a high pressure system. Leakage fluid from high pressure systems is dangerous to the staff in the engine room by itself, and leaks can cause failure of critical components of the engine and thus engine failure, which is very costly and time consuming. . Thus, in large two-stroke diesel engines of the crosshead type, many or all high pressure connections are formed from double layer conduits with two sets of overlapping pipes or conduits overlapping one another. In the inner pipe, a high pressure fluid flows. The outer pipe can serve a variety of purposes. One of them is to form a containment barrier that prevents the inner pipe from leaking or stopping. Another is the placement of various types of leak sensors. The gap between the inner and outer pipes can also be used for ventilation, cooling, heating and the like.

In the prior art, these high pressure connections were made with straight conduits. It is very complicated to construct a double pipe structure. Firstly, the inner pipe needs to be welded to the hub. The outer pipe then needs to be mounted on the inner pipe and welded to the hub. This welding process is complicated and inevitably causes welding spatters to be deposited inside the welded pipe, which is very cumbersome and time consuming. Although marine engines come in various types, each engine is individually adapted to the particular vessel's specifications. Thus, the connections are not modular and need to be adopted individually.

Therefore, there is a need for flexible and easy assembly of high pressure conduits.

JP 7-103374 discloses a flange according to the preamble of claim 1.

In this context, it is an object of the present invention to provide a flange for connecting a tube to another entity, which can prevent weld spatter in the tube. It is a further object of the present invention to provide a flange for connecting a tube to another object, in which the connection can be easily welded in tight spaces and even in difficult working positions. It is a further object of the present invention to provide a replaceable flange for connecting the tube to other components.

The above object is achieved by providing a flange for connecting the tube to another entity, the flange of which

A flange body having a proximal side and a distal side opposite for attachment to said other entity,

A central hole in the flange body, the central hole having a size and shape for receiving and supporting an end of a tube that is fixedly connectable to the flange, the central hole being open to the proximal and distal surfaces, and

At least one welding recess provided as an enlargement of the central hole, the at least one welding recess opening to the distal surface, wherein the welding recess is between the end of the tube and the flange. And to provide space for the weld portion of the.

In one embodiment, the at least one welding recess may be formed with one or more openings or holes in communication with the proximal end surface of the central hole and flange and forming an enlarged portion thereof at the proximal end of the central hole. If there are two or more such weld recesses, they are distributed separately around the periphery of the proximal end of the central hole.

Alternatively, the weld recess is an annular enlargement of the central hole. Thus, the enlargement portion extends along the entire periphery of the proximal end of the central hole.

In another embodiment, the central hole may further comprise a main section having a cross section corresponding to the cross section of the end of the tube, the central hole being conical open to the distal surface of the flange body. portion, wherein the cone portion can be configured to cooperate with the mounting region of the tube, the mounting region having a conical shape corresponding to the cone portion of the central hole.

In yet another embodiment, the distal face of the flange is formed on a protrusion extending from the flange body to the distal end such that a ledge towards the distal end is formed around the protrusion and the distal ledge and the protrusion are connected to the outer tube. do.

It is a further object of the present invention to provide a flange / tube assembly for connecting a tube to another object, which can prevent weld spatter in the tube. It is a further object of the present invention to provide a flange / tube assembly in which the connection can be easily welded in tight spaces and even in difficult working positions. Another object of the present invention is to provide a replaceable flange / tube assembly.

The above object is achieved by providing a flange / tube assembly, the assembly comprising:

A flange body having a proximal face and a distal face opposite for attachment to another object, and

A flange comprising a central hole in the flange body, the central hole being open to the proximal face and the distal face, and

An inner tube having an end,

The central hole has a size and shape for receiving and supporting an end of a tube that is fixedly connectable to the flange,

The assembly further comprises at least one welding recess provided between the end of the tube and the flange, the at least one welding recess opening to the proximal surface of the flange, the welding recess being the end of the tube. And a space for the weld between the flange and the flange.

In one embodiment, the proximal end of the end of the tube is welded to the flange at or near the proximal face of the flange.

In another embodiment, the weld recess is formed by a recess in the proximal end of the end of the tube.

In another embodiment, the at least one welding recess is alternatively or additionally formed with at least one enlarged diameter portion of the central hole in the flange.

The at least one weld recess may be formed with one or more openings or indentations in communication with the proximal end surface of the central hole and flange and forming an enlarged portion thereof at the proximal end of the central hole. Alternatively or additionally, the at least one welding recess may be formed with at least one opening or depression provided in the outer surface of the proximal end of the end of the tube. If there are two or more such weld recesses, they are distributed separately around the outer surface of the proximal end of the central hole and / or the proximal end of the end of the tube.

In another embodiment, the weld recess may be formed as an annular enlarged diameter portion of the central hole in the flange, or the weld recess is formed as an annular recess in the outer surface around the periphery of the proximal end of the end of the tube. Can be.

In another embodiment, a weld recess is formed between the enlarged diameter portion of the central hole and the recess of the proximal end of the end of the tube.

In another embodiment, the central bore includes a major portion having a cross section corresponding to the end of the tube, the central bore further comprising a cone opening to the distal surface of the flange body, the cone having a mounting area of the tube. Configured to cooperate.

In another embodiment, at least one second hole is provided through the flange body, the second hole being open to the proximal face and the distal face.

In yet another embodiment, the distal face of the flange is formed on a protrusion extending from the flange body to the distal end so that a ledge towards the distal end is formed around the protrusion, and the ledge and the distal towards the distal end are connected to the outer tube.

In another embodiment, the outer tube includes a proximal end and a cone formed at the proximal end, the ledge towards the end of the cone and the flange forms a second weld recess, the second weld recess Is configured to provide space for a weld between the proximal end of the outer tube and the flange.

In another aspect of the invention, the above object can be achieved by a method of manufacturing a high pressure conduit, the high pressure conduit,

A flange body having a proximal face and a distal face opposite for attachment to another object, and

A flange comprising a central hole in the flange body, the central hole being open to the proximal face and the distal face, and

A flange / tube assembly comprising an inner tube having an end,

The central hole has a size and shape for receiving and supporting an end of a tube that is fixedly connectable to the flange,

The assembly includes at least one weld recess provided between the end of the tube and the flange, the weld recess opening to the proximal face of the flange,

The method comprises:

Mounting the end of the tube from the distal face of the flange to the central hole such that the proximal end of the tube extends to or proximal to the proximal face, and

Welding the tube to the flange by providing a weld in each of the at least one welding recess.

In one embodiment of the method, the end of the tube is forced fit into the main portion of the hole.

In another embodiment of the method, the central hole further comprises a cone opening to the distal surface of the flange, the tube having a corresponding mounting area, the method wherein the mounting area is the conical part of the central hole. Includes more steps to be clamped in.

In another embodiment of the method, the distal face of the flange is formed on a protrusion extending from the flange body to the distal end such that a ledge towards the end is formed around the protrusion and the proximal end of the outer tube to the distal end. Forcing the outer tube onto the protrusion to abut the facing ledge.

In another embodiment of the method, the outer tube comprises a proximal end and a cone formed at the proximal end, the ledge towards the end of the cone and the flange forms a second weld recess, and the method And forming a second weld in a second weld recess to securely couple the outer tube to the flange.

The invention also relates to a flange / tube assembly as any one of the foregoing embodiments made as one embodiment of the above method.

In another aspect, the invention relates to a single-flow large-speed low speed turbocharged two-stroke diesel engine with a crosshead, the engine comprising:

A plurality of cylinders arranged in series, and

An object in the form of a gas distribution block on or near each of the cylinders,

The gas distribution blocks are connected to each other by high pressure conduits connecting neighboring gas distribution blocks,

The high pressure conduit is formed with the flange / tube assembly according to any one of the above embodiments of the flange / tube assembly.

In another aspect, the invention relates to a single-flow large-speed low speed turbocharged two-stroke diesel engine with a crosshead, the engine comprising:

A plurality of cylinders arranged in series, and

An object in the form of a gas distribution block on or near each of the cylinders,

The gas distribution blocks are connected to each other by high pressure conduits connecting neighboring gas distribution blocks,

Each end of the high pressure conduit extends substantially downward from the gas distribution block, with a portion of the gas tube between the ends following a continuous curve.

In one embodiment, the curve is an inverted arc.

In another embodiment of a single flow large speed turbocharged two-stroke diesel engine with a crosshead, the high pressure conduit comprises a flange / tube assembly according to any one of the above embodiments.

Further objects, functions, advantages and characteristics of the flange, flange / tube assembly and method according to the invention will become apparent from the detailed description.

The following detailed section of the disclosure will be described in more detail with respect to the exemplary embodiments shown in the drawings, in which:
1 is a schematic diagram of a large two-stroke diesel engine with a crosshead in front view;
2 is a side view of the large two-stroke engine of FIG. 1;
3 is a schematic diagram of a large two-stroke diesel engine with a crosshead in a side view, showing an arrangement of high pressure conduits for an LNG fuel supply system, in one embodiment of the invention;
4 is a front view of the large two-stroke engine of FIG. 3;
5 and 6 are side and front views showing details of the arrangement of the high pressure conduit for the LNG fuel supply system;
7A-7D illustrate a flange for a high pressure conduit according to one embodiment of the invention, FIG. 7A shows a side view of the flange, FIG. 7B is a bottom view, FIG. 7C is a side sectional view, and FIG. 7D is FIG. 7C A detail of the circle shown in FIG.
8A and 8B show one end of a high pressure conduit according to an embodiment of the present invention, at another stage of assembly;
9 shows the pipe for the high pressure conduit shown in FIGS. 8A and 8B;
10 shows one end of a high pressure conduit according to another embodiment of the present invention; And
11 shows one end of a high pressure conduit according to an embodiment of the invention with a connecting element.

In the detailed description that follows, high pressure conduits for large two-stroke engines will be described by way of example embodiments. 1 and 2 show a large low speed turbocharged two-stroke diesel engine 10 having a crankshaft and crosshead. 1 is a schematic diagram of a large low speed turbocharged two-stroke diesel engine with intake and exhaust system; In this exemplary embodiment, the engine has six cylinders 1 in series. Large turbocharged two-stroke diesel engines generally have five to sixteen cylinders 1 in series, which are accommodated by cylinder frames 42. The cylinder frame 42 is received on the engine frame 45. The engine 10 can be used, for example, as a main engine in marine vessels or as a stationary engine for operating a generator in a power plant. The total output of the engine may range, for example, from 5,000 to 110,000 kW.

The engine 10 is a two-stroke single flow type having a scavenge air port (not shown) in the lower region of the cylinder 1 and an exhaust valve 4 at the top of the cylinder 1. Charging air is passed from the charging air receiver 2 to the scavenging port of each cylinder 1. A piston (not shown) in the cylinder 1 compresses the boost air, and fuel is injected and burned to produce exhaust gas. When the exhaust valve 4 is opened, the exhaust gas flows through the exhaust duct (not shown) associated with the cylinder 1 to the exhaust gas receiver 3 and through the first exhaust conduit 33 the turbocharger 5. To the turbine, from which exhaust gas flows out through a second exhaust conduit (not shown). Through a shaft (not shown), the turbine 6 drives a compressor (not shown). The compressor delivers pressurized boost air supplied through an air inlet (not shown) to the boost air conduit (not shown) and leads to the boost air receiver 2.

The intake air in the boost air conduit passes through an intercooler (not shown) that cools the charge air leaving the compressor at approximately 200 ° C. to a temperature of 36 to 80 ° C.

The cooled boost air flows to the boost air receiver 2 through an auxiliary blower 43 driven by an electric motor that compresses the boost air flow at low or partial load conditions. At high loads, the compressor of the turbocharger 5 delivers sufficient compressed air and then the auxiliary blower 43 is bypassed through a check valve (not shown).

Referring now to FIGS. 3 and 4, there are shown side and front views, respectively, of an engine 10 top similar to that shown in FIGS. 1-2. 4 and 5, many engine parts have been deleted to show details of the fuel supply system using the high pressure conduit 50 according to the present invention. The figure shows a cylinder frame 42 with seven cylinders 1 each having an exhaust valve 4 with an exhaust valve actuator mounted thereon. The exhaust valve 4 is mounted on the upper plate 6 of the cylinder 1. The distribution block 130 is mounted on the top plate 6 with respect to each cylinder. In this case, the distribution block 130 distributes the fuel in the form of gas, such as liquefied natural gas (LNG), through the top plate 6 or through the top of the cylinder 1, for example through an injection valve, to the engine combustion chamber. Used. Similar distribution blocks may be used in connection with each cylinder or a pair of cylinders in connection with the supply of heavy oil or high pressure hydraulic oil for exhaust valves, engine lubrication valves and the like. In this case, the distribution block can be arranged at a position other than the top plate 6 in the engine.

The distribution block 130 is connected via a high pressure conduit 50 according to the present invention. In a conventional engine, the high pressure conduits are formed of straight pipes extending between the distribution blocks 130 or between connecting blocks (not shown) having conduits branched from the distribution block. There are two high pressure conduits 50 between each pair of neighboring distribution blocks 130 in FIGS. 3 and 4. On the right side of FIG. 3, two high pressure conduits 50 ′ are shown. This high pressure conduit 50 'may be connected to a fuel supply line (not shown).

The construction and operation of large two-stroke engines with crossheads are well known and therefore no further explanation is required in this context.

Referring to FIG. 8A, the figure shows a high pressure conduit 50 which is particularly suitable for supplying high pressure fluids such as LNG fuel gas, heavy oil, high pressure valve working fluids to the injection valves or other hydraulic valves of a large two-stroke diesel engine 10. A first embodiment of one end of a preferred flange / tube assembly is shown.

As can be seen in FIG. 3, each high pressure conduit 50 has two ends 52 and 53 and a central portion 54 (see, eg, FIG. 3). Each high pressure conduit 50 includes at least one tube 80 and a flange 60 formed at each end of the tube to provide a fluid connection between the tube and two other entities. These other entities may be valves such as fuel injection valves or exhaust valves, or gas distribution block 130 (see description below in connection with FIGS. 3-6) of a gas operated engine or more generally fuel distribution. Block or high pressure fluid distribution block, or other high pressure conduit 50. In addition, another entity may be connected to the high pressure conduit 50, such as, for example, a dispensing block at one end and a valve at the other end. In other embodiments (not shown), the flange 60 may be formed at one end of the high pressure conduit and another type of connection to the individual may be formed at the other end.

In FIG. 8A, one flange / tube assembly 51 is shown at one end of the high pressure conduit 50. The flange / tube assembly 51 includes a flange 60 and a tube 80.

The flange 60 includes a flange body 61. The flange body 61 includes a proximal face 62 and an opposite distal face 63 configured for attachment to another entity.

The central hole 70 is provided in the flange body 61. The central hole 70 is sized and shaped to accommodate and support the end 81 of the tube 80, and the tube is thus connectably fixed to the flange 60. Preferably, the cross-sectional shape of the central hole 70 is circular. The central hole 70 opens not only to the proximal face 62 but also to the distal face 63 of the flange body 61, ie the central hole extends in all directions through the flange 60.

The tube 80 is in one embodiment a straight cylinder tube (not shown) or a major portion 82 having a first diameter and a reduced diameter end 81 at the proximal end 81 ′ of the tube 80. It can have A mounting region 84 having a conical shape is formed between the end 81 and the main portion 82. In another embodiment, the diameter or cross-sectional shape of the tube 80 or of the reduced diameter end 81 is preferably slightly larger than the corresponding portion of the central hole 70, so that the tube 80 is of the flange 60. Press fit into the hole 70 to provide a tight and durable connection between them. It is desirable for at least the tube and the hole to form a tight fit.

In the illustrated embodiment, the central hole 70 includes the main portion 72. The main portion 72 has a cross-sectional shape and size that corresponds to the cross-sectional shape and size of the end 81 of the tube 80. The central hole 70 further has a cone 74 which opens to the distal face 63 of the flange body 61. The cone 74 is configured to cooperate with the mounting area 84 on the tube 80. Cone 74 will be understood in detail of FIG. 7D. By this, a interference fit between the tube 80 and the central hole 70 of the flange 60 can be achieved at the distal face 63 of the flange 60. The cone 74 can also serve as a guide for inserting the tube 80 into the central hole 70 in manufacturing. In other embodiments (not shown), cone portion 74 may be excluded.

In FIG. 9, an embodiment is shown in which the tube has an end portion 81 of reduced diameter and the aperture 70 has a corresponding shape. In another embodiment, not shown, the tube 80 is a straight tube and the holes 70 form a straight cylinder. In another embodiment, the hole 70 can have a shape, for example, as shown in FIG. 9, and the tube 80 can be a straight cylindrical shape before being forced fit and into the hole 70. It may have the shape shown in FIG. 9 after being forced fit.

As shown in FIGS. 7C and 8A and 8B, a weld recess 71 may be provided as part 71 ′ of the central hole 70 having an enlarged diameter with respect to the main portion 72. The welding recess 71 opens to the proximal face 62 of the body portion 61 of the flange 60. The weld recess 71 so formed by the enlarged diameter portion 71 ′ provides space for the weld 100 between the end 81 of the tube 80 and the flange 60.

In another embodiment (not shown), the weld recess (es) 71 are provided by a plurality of enlarged discrete portions or recesses disposed around the central hole 70 such that each individual recess is flanged. It may be opened to the proximal surface 62 of the body portion 61 of 60. Thus, there may be one or more weld recesses 71 configured to provide a number of spaces for the weld 100 between the end 81 of the tube 80 and the flange 60.

By doing so, a fixed or permanent connection between the tube 80 and the flange 60 can be provided from the proximal face 62 of the flange, which is particularly useful in situations where high pressure conduits are formed in tight spaces. This is a great advantage in situations with two external conduits (see below).

The weld is preferably provided between the proximal end 81 ′ of the end 81 of the tube 80 and the recess 71 ′ at or near the proximal face 62 of the flange 60.

In embodiments where the flange / tube assembly 51 also has a clamp fit between the tube 80 and the central hole 70 (conicals 74 and 84), between the tube 80 and the flange 60 Particularly stable and rigid connections are achieved, where the weld 100 closes the cones 74 and 84 at one proximal end of the central hole 70 and the other (distal) end of the central hole 70.

The distal face 63 or distal end surface of the flange 60 is preferably formed on a protrusion 64 extending distal from the flange body 61. The protrusion 64 has a circumferential sidewall 64 '. A ledge 65 facing in the distal direction is formed around the protrusion 64. The ledge 65 and the projection 64 towards the end are configured to be connected to the outer tube 90, as can be seen in FIG. 8B.

Tube 80 may also be referred to as an inner tube.

The outer tube 90 can be connected to the protrusion 64 by a forced fit connection. The outer tube 90 has a proximal end 91, and the proximal end 91 may be adjacent to the ledge 65 towards the end in one embodiment (not shown). The connection between the outer tube and the flange 60 may be provided between the proximal end 91 and the ledge 65 towards the end in one embodiment (not shown). In other embodiments, and as shown in FIG. 8B, the proximal end 91 does not contact the ledge 65 towards the end. In one embodiment (not shown), the weld can thus be formed between the proximal end 91 of the outer tube 90, the ledge 65 facing the distal end and the circumferential sidewall 64 ′ of the protrusion 64.

In another embodiment, the outer tube 90 has a cone 92 formed at the proximal end 91. By doing so, when the second welding recess 91 ′, the outer tube, is mounted on the protrusion 64, the cone 92, the ledge 65 facing the end of the flange 60, and the protrusion 64. Is formed between the circumferential sidewalls 64 '. As can be seen in FIG. 8B, a second weld recess 91 ′ is formed between the proximal end 91 of the outer tube 90, the ledge 65 facing the end and the circumferential sidewall 64 ′ of the protrusion 64. Is configured to provide space for the weld 110. Even in embodiments where the proximal end 91 is adjacent to the ledge 65 toward the end, the cone 92 also provides a stable, durable and complete pressure-tight connection between the outer tube 90 and the flange 60. It is ensured that a second welding recess 91 ′ is formed which provides sufficient space for the weld 110.

An intermediate space 140 is formed between the tube 80 and the outer tube 90. In the event of a rupture of the tube 80, the outer tube 90 will act as a backup barrier against the leakage of high pressure fluid flowing or contained in the tube 80, and the tube 80 and the outer tube ( Intermediate space 140 formed between 90 will provide a backup receptacle for the high pressure fluid leaking out of the tube 80. Intermediate space 140 provides general information about the state of the high pressure conduit 50, such as, for example, pressure, temperature, conductivity, or the like for detecting leaks from tube 80. It may include a sensor (not shown). The sensor (not shown) may be in wireless communication with a control device (not shown). Alternatively, such a sensor (not shown) may include at least one second hole formed through the flange 60, as described below. It can communicate with a control device (not shown) through. By doing so, it is possible to carry out the preparation or repair of the high pressure conduit 50, while suppressing the leak until the repair can be carried out most conveniently.

In another embodiment, at least one second hole 75 or through hole is provided through the flange body 61. The second hole 75 thus opens to the proximal face 62 and the distal face 63. The at least one second hole 75 is provided in or through the body portion 61 of the flange 60 between the central hole 70 and the outer periphery 66 of the flange 60. Preferably, a plurality of second holes 75 are arranged in or through the body portion 61 of the flange 60 between the central hole 70 and the outer periphery 66 of the flange 60 to form the central hole 70. Surrounds.

The at least one second hole 75 is provided to allow a passage between the intermediate space 140 and at least a portion of the object to which the high pressure conduit 50 is to be connected. The passage provided by the at least one second hole 75 can thus be used to provide a connection, such as a wire, to a sensor provided in the intermediate space 140, for example. Alternatively, one or more sensors may be provided in the object to which the high pressure conduit 50 is connected, wherein the at least one second hole 75 allows for the detection of leaks therefrom, for example.

The at least one second hole 75 may alternatively or additionally allow control of the conditions in the intermediary space 140. Such control may involve ventilation, cooling or heating of the intermediate space 140 via ventilation, cooling or heating means provided in the object to which the high pressure conduit 50 is connected.

8A and 8B thus illustrate another embodiment of the flange / tube connection 51 and the high pressure conduit 50. In one embodiment, there is only one tube 80. In another embodiment there are two tubes of (inner) tube 80 and outer tube 90, which are formed concentrically with respect to each other. However, FIGS. 8A and 8B also show two steps of fabrication of the flange / tube connection 51 and the high pressure conduit 50. In Fig. 8A, the tube 80 is mounted in the central hole, preferably by a forced fit. The weld recess 71 formed between the enlarged diameter portion 71 ′ of the central hole 70 and the outer surface of the proximal portion 81 of the tube 80 does not yet have a weld. In FIG. 8B, a weld 100 is formed in the weld recess 71. The outer tube is also mounted on the protrusion 64 to form a second weld recess, and the second weld 110 is formed in the second weld recess.

The flange / tube connection 51 shown in FIG. 10 may have an outer tube 90 in the same manner as described above in another embodiment.

Above, a fixed connection between the (inner) tube 80 and the flange 60 is provided by a weld 100 formed in the weld recess 71, the weld recess 71 being provided in the flange 60. What was formed with the enlarged diameter part 71 'of the center hole 70 was demonstrated.

As such, in another embodiment, and as shown in FIG. 10, the weld recess 71 is alternatively by a recess in the proximal end 81 ′ of the end 81 of the tube 80. Is formed. This recess is provided by the conical portion 85 of the tube 80 at the proximal end 81 ′ of the end 81 of the tube 80.

Alternatively (not shown), the weld recess 80 is circular with the enlarged diameter portion 70 ′ of the central hole 70 at the proximal end 81 ′ of the end 81 of the tube 80. It may be partially formed by the weight 85.

More generally, a weld recess 71 may be provided at the proximal face 62 of the flange between the proximal end 81 ′ of the end 81 of the tube 80 and the flange 60.

The high pressure fluid conduit 50 is thus connected by a method in which the end 81 of the tube 80 is mounted from the distal face 63 of the flange 60 into the central hole 70 of the flange 60 and the tube ( Proximal end 81 ′ of 80 may be provided to extend to proximal face 62 (with proximal end 81 ′ coplanar with the end surface provided by proximal face 62). Alternatively, the proximal end 81 ′ of the tube 80 extends close to the surface provided by the proximal face 62. Preferably, the proximal end 81 ′ of the tube 80 extends slightly above or near the surface provided by the proximal face 62.

In another step, the tube 80 is welded to the flange by providing a weld 100 in the weld recess 71 as described above.

Preferably, any excess weld material and / or proximal end 81 'of the tube 80 extending from the proximal face 62 is ground and removed from the surface (proximal end 81' of the tube 80). The proximal face 62 of the flange is polished. This is easy due to the placement of the welding recess 71.

In one embodiment of the manufacturing process, the end 81 of the tube 80 is forced fit into the main portion 72 of the hole 70 prior to the welding process.

In another embodiment of the manufacturing process, and when the central hole 70 further has a conical portion 73 open to the distal face 63 of the flange, and the tube 80 has a corresponding mounting area 84. In the case of (), the mounting area 84 is clamped to the conical portion 73 of the central hole 70 prior to the welding process.

In another embodiment of the manufacturing process, the outer tube 90 is forced fit over the protrusion 64 on the flange. The proximal end 91 of the outer tube 90 may be adjacent to the ledge 65 towards the end.

In another embodiment of the manufacturing process, the outer tube 90 is welded to the flange 60. The second weld 110 may be formed in the second weld recess 91 ′.

The above embodiment of the manufacturing method requires one tube to be welded from the distal face of the flange, which allows for easy production compared to the prior art method, which can be difficult to apply to the tight spaces of a marine vessel. do. In addition, the method provides a much more stable, durable and rigid connection. In the case where the outer tube is provided over the inner tube / embodiment, the flange, assembly and method according to the invention allow the inner tube to be welded to the proximal face of the flange, while the outer tube is to be welded to the flange from the distal face. Can be. This allows for much easier manufacture of high pressure piping, for example on the site of marine vessels, and it is much easier to prevent welding waste, welding spatters inside these tubes.

The flange / tube assembly includes part of the high pressure conduit. The high pressure conduit may be connected to another entity 150, such as gas distribution block 130 or other high pressure conduit. The connection is provided through corresponding and cooperating connection means 151 provided on the flange 160 and other object 150. An example of such a connection is shown in FIG. 11. A sealing element 250 can be provided between the flange 60 and the corresponding and cooperating connecting means 151 provided on the other object 150. In the embodiment shown, the sealing element 250 is a ring element having a flange 251 in the same plane as the proximal end surface 62, and the two annular projections 252, 253 are opposite the flange 251. Is extended. Annular protrusions 252 and 253 each have a conical outer surface.

One annular protrusion 152 is arranged to cooperate with the inlet 171 of the passage 170 in the other object 150, the inlet 170 being the passage provided by the tube 80 when the high pressure conduit is connected with the other object. To form an extension. Another annular protrusion 153 is arranged to cooperate with the inlet formed by the proximal end 81 ′ of the tube 80. Alternatively or additionally, an o-ring may be provided between the proximal end surface 62 of the flange 60 and the end surface 162 of the corresponding and cooperating connecting means 151 on the other object 150. . In an embodiment (not shown), an annular groove is provided between the proximal end surface 62 of the flange 60 and / or the end surface 162 of the corresponding and cooperating connecting means 151 on the other object 150. And the annular groove is configured to receive and guide the O-ring.

The corresponding and cooperating connecting means 151 and the flange 60 on the other object 150 are connected to each other by tightly pressing by the compression means. Such means may be provided, for example, by a flange connected to the flange 60 in an annular groove 260 in the outer wall of the flange body. As shown in FIG. 11, a similar annular groove 260 'may be provided on the outer surface of the connecting means 151 on the other entity 150. Alternatively (not shown), the connecting means 151 on the flange 60 and the other object 150 can be, for example, a flange extending radially around the outer wall of the body 61 of the flange 60 and the other. Screws, bolts or similar connections provided in a suitable mating hole provided on the connecting means 151 on the object 150 or through the body 61 of the flange and through the connecting means 151 on the other object 150. Pressurized together by means.

The sealing element 250 shown in FIG. 11 may be of a type that is modified to provide a seal when pressed between two parts, the flange 60 and the connecting means 151 on the other object 150.

3 and 4 show another embodiment of the present invention. 3 shows the engine and its parts in a side view. 4 also shows the engine 10 and parts thereof in a front view. For simplicity, only the most relevant parts of the engine 10 are shown in these figures. Embodiments of the manufacturing method of the flange 60, the flange / tube assembly 51, and the high pressure conduit shown in FIGS. Suitable for applications in, the engine 10 operates on gases such as high pressure liquefied natural gas (LNG).

3 and 4 illustrate a single flow large speed turbocharged two-stroke diesel engine 10 with a crosshead. The engine 10 includes a plurality of cylinders 1 arranged in series and gas distribution blocks 130 at or near each cylinder 1. The gas distribution blocks 130 are connected to each other by high pressure conduits 50 connecting neighboring gas distribution blocks 130.

Engine fuel is gas. The gas must be supplied to the engine at a high pressure of 100 to 500 bar, for example 200 to 400 bar. The high pressure conduit should be tightly coupled with another object 150 to prevent leakage or explosion. The flange 60 and flange / tube assembly described above are particularly useful for providing such rigid high pressure conduits and connections.

Each end 52 and 53 of the high pressure conduit 50 extends substantially downward from the gas distribution block 130. The portion 54 of the gas tube between the two ends 52 and 53 follows a continuous curve. Preferably, the continuous curve is an inverted arc. The high pressure conduit 50 preferably comprises a flange 60 or a flange / tube assembly 51 as described above. Preferably, the high pressure conduit 50 is of a type comprising an (inner) tube 80 and an outer tube 90.

5 and 6 show detailed front and side views of the high pressure conduit 50 and the distribution block 130.

This provides a very flexible way of connecting the gas distribution block 130 and the gas fuel supply to the cylinder 1 to each other. The "hanging" arrangement of the high pressure conduit 50 is affected by the expansion and contraction of the mechanical parts and from the running engine while moving from the cooling stage to the heating stage (when starting the engine). It further has the advantage that the high pressure conduits subject to vibration can very easily adapt to the expansion / contraction of the engine due to temperature fluctuations. The "hanging" arrangement also consumes vibration of the engine.

Tube 80 and outer tube 90 are preferably formed of a metal, such as, for example, steel, stainless steel, or the like. They can be flexible or flexible.

Accordingly, the present invention provides a wide variety of possible designs and adaptations of all high pressure conduits for large low speed turbocharged two-stroke diesel engines.

In addition, due to its flexibility and limited space requirements, the present invention can be utilized in engines that already exist.

Although the teachings of this application have been described in detail for purposes of illustration, those skilled in the art will understand that such details are for that purpose only and modifications may be made without departing from the scope of the teachings of this application.

In the context of the present application, the term "proximal" should be interpreted as proximal or "close to" an object 150 such as, for example, distribution block 130 to which a flange or flange / tube assembly is to be connected. do. Likewise, the term "distal" should be interpreted as "deviating" from an object 150 such as, for example, distribution block 130 to which a flange or flange / tube assembly is to be connected.

As used in the claims, the term "comprising" does not exclude other elements or steps. As used in the claims, the phrase "one" does not exclude a plurality. A single processor or other device may accomplish the functions of the various means recited in the claims.

1: cylinder
10: Engine
50, 50 ': high pressure conduit
51: flange / tube assembly
60: flange
70: center hole
80: inner tube
90: outer tube
100, 110: welded portion
130: gas distribution block
150: object

Claims (17)

1. In the flange 60 for connecting the tube 80 to another object 150, the flange 60,
A flange body 61 having a proximal surface 62 and an opposite distal surface 63 for attachment to the other entity,
A central hole 70 in the flange body 61, the central hole 70 accommodates an end 81 of the inner tube 80 such that the inner tube 80 can be fixedly connected to the flange 60. The inner tube 80 extends from the distal face 63, the central hole 70 opens into the proximal face 62 and the distal face 63, and And
At least one welding recess 71 provided as an enlarged portion of the central hole 70, wherein the at least one welding recess 71 opens to the proximal surface 62 and the welding recess ( 71 is configured to provide space for a weld between the end 81 of the tube 80 and the flange 60,
The distal surface 63 is formed on a protrusion 64 extending distal from the flange body 61 so that a ledge 65 facing the distal end is formed around the protrusion, and the ledge 65 and the protrusion facing the distal end are formed. And a flange configured to be connected to an outer tube (90) extending from the distal surface (63) and surrounding the inner tube (80). The method of claim 1,
Flange (60), characterized in that the welding recess (71) is an annular enlargement (71 ') of the central hole (70). 3. The method according to claim 1 or 2,
The central hole 70 comprises a main portion 72 having a cross section corresponding to the cross section of the end 81 of the tube 80, wherein the central hole 70 is the distal surface 63 of the flange body 61. Further comprises a conical portion 74, wherein the conical portion 74 is configured to cooperate with the mounting area 84 of the tube 80, the mounting area 84 being the circle of the tube 80. Flange 60, characterized by having a conical shape corresponding to the weight (74). In the flange / tube assembly 51, the assembly is
A flange body 61 having a proximal face 62 and an opposite distal face 63 for attachment to another object 150, and
A flange 60 comprising a central hole 70 in the flange body 61, the central hole 70 is open to the proximal face 62 and the distal face 63, and
An inner tube 80 having an end 81,
The assembly is characterized by an outer tube 90 surrounding the inner tube,
The central hole 70 has a size and shape for receiving and supporting an end portion 81 of the inner tube 80 for fixedly connecting the inner tube 80 to the flange 60, the inner tube 80 protrudes from the distal face 63,
The assembly further comprises at least one welding recess 71 provided between the end 81 of the inner tube 80 and the flange 60, wherein the at least one welding recess 71 is formed of a flange. Open to the proximal face 62, the weld recess 71 is configured to provide space for a weld between the end 81 of the inner tube 80 and the flange 60,
The distal face 63 of the flange 60 is formed on a protrusion 64 extending distal from the flange body 61 so that a ledge 65 towards the end is formed around the protrusion 64, and to the distal end 63. The facing ledge 65 and the protrusion 64 are configured to be connected to the outer tube 90, wherein the outer tube 90 protrudes from the distal face 63. ). 5. The method of claim 4,
The proximal end (81 ′) of the end (81) is welded to the flange (60) at or near the proximal face (62) of the flange (60). The method according to claim 4 or 5,
The weld recess (71) is formed by a recess in the proximal surface (81 ') of the end (81) of the tube (80). The method according to claim 4 or 5,
The at least one weld recess (71) is formed with an annular enlarged diameter portion (71 ') of the central hole (70). The method according to claim 4 or 5,
The welding recess 71 is formed between an enlarged diameter portion 71 ′ of the central hole 70 and a recess of the proximal end 81 ′ of the end 81 of the tube 80. Flange / tube assembly (51). 9. The method according to any one of claims 4 to 8,
The central hole 70 comprises a main portion 72 having a cross section configured to cooperate with the end 81 of the tube 80, the central hole 70 being the distal surface 63 of the flange body 61. Further comprising a conical portion 74, wherein the conical portion 74 is configured to cooperate with the mounting region 84 of the tube 80, the mounting region 84 corresponding to the conical portion 74. Flange / tube assembly (51), characterized in that it has a conical shape. 10. The method according to any one of claims 4 to 9,
At least one second hole 75 is provided through the flange body 61, the second hole 75 being open to the proximal face 62 and the distal face 63 of the flange. Flange / tube assembly (51). 11. The method of claim 10,
The outer tube 90 includes a proximal end 91 and a conical portion 92 formed at the proximal end 91, wherein the ledge 65 facing the end of the flange and the conical portion 92 has a second portion. A welding recess 91 'is formed, and the second welding recess 91' forms a space for the weld 110 between the proximal end 91 of the outer tube 90 and the flange 60. Flange / tube assembly (51), characterized in that it is configured to provide. In a method of making a high pressure conduit 50, the high pressure conduit 50,
A flange body 61 having a proximal face 62 and an opposite distal face 63 for attachment to another object 150, and
A flange 60 comprising a central hole 70 in the flange body 61, the central hole 70 is open to the proximal face 62 and the distal face 63,
An inner tube 80 having an end 81, and
A flange / tube assembly 51 comprising an outer tube 90 surrounding the inner tube,
The central hole 70 has a size and shape for receiving and supporting the end portion 81 of the inner tube 80 that can be fixedly connected to the flange 60,
At least one welding recess 71 is provided between the end 81 of the tube 80 and the flange 60, the welding recess 71 opening to the proximal surface 62 of the flange, And
The distal face 63 of the flange 60 is formed on a protrusion 64 extending distal from the flange body 61 so that a ledge 65 towards the end is formed around the protrusion 64, and to the distal end 63. Facing ledge 65 and the protrusion 64 are configured to be connected to the outer tube 90, the outer tube 90 protrudes from the distal surface 63,
The method comprises:
Mounting the end portion 81 of the tube 80 from the distal surface 63 of the flange 60 to the central aperture 70 so that the proximal end 81 ' ) Or proximal thereto,
Welding the tube 80 to the flange by providing a weld 100 in each of the at least one weld recess 71, and
And forcing the outer tube (90) onto the protrusion (64), wherein the proximal end (91) of the outer tube (90) is adjacent the ledge (65) towards the end. 13. The method of claim 12,
The end (81) of the tube (80) is forcibly fitted into the main part (72) of the hole (70). The method according to claim 12 or 13,
The center hole (70) further comprises a conical portion (73) open to the distal face (63) of the flange, the tube (80) having a corresponding mounting area (84) ) Is clamped to the conical portion (73) of the central hole (70). 15. The method of claim 14,
The outer tube 90 includes a proximal end 91 and a conical portion 92 formed at the proximal end 91, wherein the ledge 65 facing the end of the flange and the conical portion 92 has a second portion. A welding recess 91 ′ is formed, and a second welding portion 110 is formed in the second welding recess 91 ′ to securely connect the outer tube 90 to the flange 60. How to. In a single-flow large-speed low-speed turbocharged two-stroke diesel engine 10 having a crosshead, the engine includes:
A plurality of cylinders 1 arranged in series, and
A gas distribution block 130 on or near each of the cylinders,
The gas distribution blocks 130 are connected to each other by high pressure conduits 50 connecting neighboring gas distribution blocks 130,
Each end 52, 53 of the high pressure conduit 50 extends substantially downward from the gas distribution block 130, and a portion 54 of the gas tube between the ends 52, 53 is a continuous curve. Follow
Engine (10), characterized in that the high pressure conduit (50) comprises a flange / tube assembly (51) according to any one of claims 4-11. 17. The method of claim 16,
And the curve is an inverted arc.

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