CN211417564U

CN211417564U - Seawater backflow preventing device for stern smoke exhaust pipe of full-rotation tugboat

Info

Publication number: CN211417564U
Application number: CN201922464271.3U
Authority: CN
Inventors: 孙红娟; 纪震; 韦国新
Original assignee: JIANGSU ZHENJIANG SHIPYARD (GROUP) CO Ltd
Current assignee: JIANGSU ZHENJIANG SHIPYARD (GROUP) CO Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-04
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a device is prevented sea water and is backward irritated to stern exhaust pipe of full gyration tug, include the stern exhaust pipe that is the shape of falling the U, is Z shape at the projection of horizontal plane at the projection of perpendicular, stern exhaust pipe one end is fixed on rudder oar cabin back wall stern shrouding, and the other end links to each other with the slope branch pipe of trident pipe. The horizontal branch pipe of the Y-pipe is connected with the main engine silencer, the vertical branch pipe of the Y-pipe is connected with the top end of the seawater collecting mechanism, and the center of one end of the stern smoke exhaust pipe is higher than the center of the horizontal branch pipe of the Y-pipe. The utility model discloses can avoid the sea water to flow backward into stern exhaust pipe effectively, in case the sea water flows backward into stern exhaust pipe, the sea water is collected to accessible sea water collection mechanism and is collected the sea water to the sea water in the water catch bowl can be released automatically, avoids taking place the flameout serious fault of host computer, ensures that the sea water of flowing backward can not invade host computer muffler and host computer booster via stern exhaust pipe, prolongs the life of host computer, reduces the maintenance cost of full gyration tug, ensures the navigation safety of full gyration tug.

Description

Seawater backflow preventing device for stern smoke exhaust pipe of full-rotation tugboat

Technical Field

The utility model relates to a fume extractor of full gyration tug, especially a prevent that sea water from exhausting fume pipe backward flow from stern and advance host computer muffler, prevent that sea water of host computer booster from backward flow device that flows belongs to special engineering boats and ships technical field even.

Background

The full-rotation tugboat integrates functions of high power, fire fighting, towing, pushing and the like, is a special engineering ship for providing service for large ships entering and exiting ports in a ship operation area, has the greatest characteristic of capability of realizing in-situ 360-degree rotation, has the advantages of high propelling power, high traction force, flexibility in operation, good stability and the like, and is one of two essential machines for port development.

When the full-rotation tugboat serves a large ship, if the structure of the upper smoke exhaust chimney is adopted, the side outer plate of the large ship is easy to be rubbed when the tugboat is pushed laterally. Therefore, part of the full-rotation tug for port operation adopts a stern smoke exhaust structure. However, when the full-circle-turning tugboat with the stern smoke exhaust structure operates in coastal or offshore navigation areas and meets storm waves above sea level 6, the stern smoke exhaust pipe is easy to cause seawater backflow, seawater enters the silencer along the stern smoke exhaust pipe and even enters the main engine supercharger to damage the silencer and the main engine supercharger, and more seriously, the main engine is flameout, the navigation safety of the full-circle-turning tugboat is seriously influenced, the service life of the main engine is shortened, and the maintenance cost of the full-circle-turning tugboat is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, can avoid the sea water to get into the stern of the full gyration tugboat of muffler and host computer booster effectively and discharge fume the tub and prevent the sea water device of irritating backward.

The utility model discloses a following technical scheme realizes:

a stern smoke exhaust pipe seawater backflow prevention device of a full-rotation tugboat comprises a stern smoke exhaust pipe, wherein one end of the stern smoke exhaust pipe is fixed on a stern sealing plate on the rear wall of a rudder propeller cabin; the projection of the stern smoke exhaust pipe on the vertical plane is in an inverted U shape, and the projection of the stern smoke exhaust pipe on the horizontal plane is in a Z shape; the other end of the stern smoke exhaust pipe is connected with an inclined branch pipe of the Y-pipe through a main engine smoke exhaust pipe expansion joint, a horizontal branch pipe of the Y-pipe is connected with the output end of the main engine silencer, and a vertical branch pipe of the Y-pipe is connected with the top end of the seawater collecting mechanism; the seawater collecting mechanism comprises a water collecting barrel, a liquid level switch, a water collecting barrel discharge valve and a water collecting barrel discharge pipe, the top end of the water collecting barrel is fixedly connected with the lower end of a vertical branch pipe of the Y-pipe, the liquid level switch is arranged on the barrel wall of the water collecting barrel, and the barrel bottom of the water collecting barrel is connected with the upper end of the water collecting barrel discharge pipe through the water collecting barrel discharge valve.

The object of the invention is further achieved by the following technical measures.

Furthermore, the center of one end of a stern smoke exhaust pipe fixed on a stern closing plate on the rear wall of the rudder propeller cabin is higher than the center of a horizontal branch pipe of the Y-pipe, and the height difference A =590 mm-610 mm.

Further, the height difference B =1180 mm-1220 mm between the center of one end of the stern smoke exhaust pipe and the design waterline a-a; the vertical distance D between the center of one end of the stern smoke exhaust pipe and the center of the horizontal pipe at the top of the inverted U-shaped stern smoke exhaust pipe is less than 520 mm-540 mm. The ratio of the height C of the center of the liquid level switch from the bottom of the water collecting bucket to the depth H of the water collecting bucket: C/H =0.35 ~ 0.45.

Furthermore, the seawater backflow preventing mechanism for the diesel generating set smoke exhaust pipe comprises a plurality of sections of diesel generating set smoke exhaust pipes and diesel generating set silencers, expansion joints are arranged between every two adjacent sections of diesel generating set smoke exhaust pipes respectively, two ends of each diesel generating set silencer are connected with the corresponding diesel generating set smoke exhaust pipe respectively, and the tail section of diesel generating set smoke exhaust pipe is connected with the transverse pipe at the top of the inverted U-shaped stern smoke exhaust pipe.

The utility model discloses simple structure adopts the exhaust port height, discharges fume the pipe with the low inverted U-shaped stern of host computer muffler connector to and the exhaust port center of stern discharge fume the pipe and the difference in height of design waterline reach the structure more than 1200mm, can avoid the sea water to flow backward into stern discharge fume the pipe effectively. Once the seawater flows backwards into the stern smoke exhaust pipe, the seawater can be collected by the water collecting barrel at the lower end of the vertical branch pipe of the Y-tube connected with the stern smoke exhaust pipe, when the liquid level of the seawater collected by the water collecting barrel reaches the height of the liquid level switch, the liquid level switch sends a signal to the central processing unit, the central processing unit sends a signal to open the discharge valve of the water collecting barrel below the water collecting barrel, the seawater in the water collecting barrel is automatically released, the backward flowing seawater is ensured not to invade into the main engine silencer and the main engine supercharger through the stern smoke exhaust pipe, the serious fault of flameout of the main engine is avoided, the service life of the main engine is prolonged, the maintenance cost of the full-circle tug is reduced, and the sailing.

The advantages and features of the invention will be illustrated and explained by the following non-restrictive description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.

Drawings

Fig. 1 is a side view of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is an enlarged view of a portion i of fig. 1.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

In the midship and stern structures of the full-circle tug boat shown in fig. 1 and 2, two main engines 10 and two diesel generator sets 20 are approximately symmetrically arranged in the port and starboard sides of the midship, and the upper parts of two rudder propeller engines 30 are symmetrically arranged in rudder propeller cabins 40 of the stern. The plurality of smoke exhaust pipes are sequentially connected with a main engine supercharger smoke exhaust port 101 to a rudder propeller cabin rear wall stern closing plate 401.

The left end of a stern smoke exhaust pipe 11 of the embodiment is welded and fixed on a stern closing plate 401 of the rear wall of a rudder propeller cabin, the right end of a first section of smoke exhaust pipe 12 is fixedly connected with a main engine supercharger smoke exhaust port 101, a middle smoke exhaust pipe 13 is connected with the right end of the stern smoke exhaust pipe 11 sequentially through a main engine silencer 50 and a main engine smoke exhaust pipe expansion joint 60, the projection of the stern smoke exhaust pipe 11 on the vertical plane is in an inverted U shape, and the projection on the horizontal plane is in a Z shape.

The right end of the stern smoke exhaust pipe 11 is connected with the inclined branch pipe 21 at the left end of the Y-pipe 2 through a main engine smoke exhaust pipe expansion joint 60, the right end of the horizontal branch pipe 22 of the Y-pipe 2 is connected with the output end of the main engine silencer 50, and the vertical branch pipe 23 of the Y-pipe 2 is connected with the top end of the seawater collecting mechanism 3. The center of the left end of the stern smoke exhaust pipe 11 is higher than the center of the horizontal branch pipe 22 of the Y-pipe 2, the height difference A =600mm between the left end and the center of the stern smoke exhaust pipe 11 in the embodiment, the height difference B =1200mm between the center of the left end of the stern smoke exhaust pipe 11 and a designed waterline a-a, and the vertical distance D =530mm between the center of the left end of the stern smoke exhaust pipe 13 and the center of the horizontal pipe 111 at the top of the stern smoke exhaust pipe in the shape of an inverted U. The utility model discloses a stern discharge fume pipe 11 adopts the export high, low and discharge fume that the pipe top is violently managed 111 with the 50 links of host computer muffler and is higher than the inverted U-shaped structure at 11 left ends centers of stern discharge fume pipe to and the stern discharge fume 11 discharge fume port centers be higher than the pattern of arranging more than 1200mm of design waterline, make and adopted the utility model discloses a full gyration tug is in the sea condition of the stormy waves below 6 grades, and the sea water is difficult to flow backward and advances stern discharge fume pipe 11, has improved full gyration tug navigation security.

As shown in fig. 3, the seawater collecting mechanism 3 of the present embodiment includes a water collecting barrel 31, a liquid level switch 32, a water collecting barrel discharge valve 33 and a water collecting barrel discharge pipe 34, wherein the top end of the water collecting barrel 31 is fixedly connected to the lower end of the vertical branch pipe 23 of the Y-pipe 2 through a connecting flange 311, the liquid level switch 32 is disposed on the barrel wall of the water collecting barrel 31, and the bottom of the water collecting barrel 31 is connected to the upper end of the water collecting barrel discharge pipe 34 through the water collecting barrel discharge valve 33. The liquid level switch 32 can effectively avoid the accident potential that sea water in the water collecting bucket 31 overflows into the stern smoke exhaust pipe 11 because a crew mistakenly operates to close the water collecting bucket discharge valve 33. The ratio of the height C of the center of the liquid level switch 32 to the bottom of the water collecting barrel and the depth H of the water collecting barrel 31 is as follows: C/H =0.40, when the seawater in the water collecting bucket 31 rises to trigger the liquid level switch 32, the liquid level switch 32 generates an alarm signal, the alarm signal is transmitted to an alarm board of a cabin centralized control room, the central controller sends a signal to automatically open the water collecting bucket discharge valve 33, the seawater in the water collecting bucket 31 is discharged in time, and the seawater cannot overflow. The seawater in the water collecting barrel 31 is discharged to the lowest part of the bottom of the rudder propeller cabin 40 through the water collecting barrel discharge pipe 34, and then is pumped out to the bottom of the cabin through a bottom water cabin suction inlet, a bottom suction pipe and the like of the ship system cabin. The seawater collecting mechanism 3 can be controlled in a centralized manner by the cabin centralized control room, and seawater in the water collecting barrel 31 can be prevented from overflowing into the stern smoke exhaust pipe 11. When the full-rotation tugboat encounters wind waves above the level 6, the seawater flowing into the stern smoke exhaust pipe 11 is intensively discharged through the water collecting barrel 31, so that the seawater is ensured not to flow into the main engine supercharger. According to the requirement, the stern smoke exhaust pipe 11 can be made of corrosion-resistant stainless steel pipes or the inside and outside of the steel pipes are galvanized, so that the corrosion resistance of the stern smoke exhaust pipe 11 is improved, and the service life of the stern smoke exhaust pipe is prolonged.

As shown in fig. 2, the seawater backflow preventing mechanism 4 of the diesel generator set smoke exhaust pipe of the present embodiment includes several sections of diesel generator set smoke exhaust pipes 41 and diesel generator set silencers 42, expansion joints 43 are respectively disposed between two adjacent sections of the diesel generator set smoke exhaust pipes 41, two ends of the diesel generator set silencers 42 are respectively connected to the corresponding diesel generator set smoke exhaust pipes 41, and the last section of the diesel generator set smoke exhaust pipe 41 is connected to the horizontal pipe 111 at the top of the stern smoke exhaust pipe in the shape of an inverted U. Due to the structure, the two sections of smoke exhaust pipes 41 of the diesel generating set at the left end of the silencer 42 of the diesel generating set shown in fig. 1 are Z-shaped, so that seawater can be effectively prevented from flowing backwards into the silencer 42 of the diesel generating set through the smoke exhaust pipes 41 of the diesel generating set.

In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A stern smoke exhaust pipe seawater backflow prevention device of a full-rotation tugboat comprises a stern smoke exhaust pipe, wherein one end of the stern smoke exhaust pipe is fixed on a stern sealing plate on the rear wall of a rudder propeller cabin; the method is characterized in that: the projection of the stern smoke exhaust pipe on the vertical plane is in an inverted U shape, and the projection of the stern smoke exhaust pipe on the horizontal plane is in a Z shape; the other end of the stern smoke exhaust pipe is connected with an inclined branch pipe of the Y-pipe through a main engine smoke exhaust pipe expansion joint, a horizontal branch pipe of the Y-pipe is connected with the output end of the main engine silencer, and a vertical branch pipe of the Y-pipe is connected with the top end of the seawater collecting mechanism; the seawater collecting mechanism comprises a water collecting barrel, a liquid level switch, a water collecting barrel discharge valve and a water collecting barrel discharge pipe, wherein the top end of the water collecting barrel is fixedly connected with the lower end of a vertical branch pipe of the Y-pipe, the liquid level switch is arranged on the barrel wall of the water collecting barrel, and the barrel bottom of the water collecting barrel is connected with the upper end of the water collecting barrel discharge pipe through the water collecting barrel discharge valve; the center of one end of a stern smoke exhaust pipe fixed on a stern closing plate on the rear wall of the rudder propeller cabin is higher than the center of a horizontal branch pipe of the Y-pipe.

2. The stern smoke exhaust pipe anti-backflow device of the full-circle-turning tugboat as claimed in claim 1, wherein: the height difference A =590 mm-610 mm between the center of one end of the stern smoke exhaust pipe and the center of the horizontal branch pipe of the Y-pipe.

3. The stern smoke exhaust pipe anti-backflow device of the full-circle-turning tugboat as claimed in claim 1, wherein: the height difference B =1180 mm-1220 mm between the center of one end of the stern smoke exhaust pipe and the design waterline a-a.

4. The stern smoke exhaust pipe anti-backflow device of the full-circle-turning tugboat as claimed in claim 1, wherein: the vertical distance D between the center of one end of the stern smoke exhaust pipe and the center of the horizontal pipe at the top of the inverted U-shaped stern smoke exhaust pipe is less than 520 mm-540 mm.

5. The stern smoke exhaust pipe anti-backflow device of the full-circle-turning tugboat as claimed in claim 1, wherein: the ratio of the height C of the center of the liquid level switch from the bottom of the water collecting bucket to the depth H of the water collecting bucket: C/H =0.35 ~ 0.45.

6. The stern smoke exhaust pipe anti-backflow device of the full-circle-turning tugboat as claimed in claim 1, wherein: the seawater backflow preventing mechanism comprises a plurality of diesel generating set smoke exhaust pipes and a diesel generating set silencer, expansion joints are arranged between every two adjacent sections of diesel generating set smoke exhaust pipes respectively, two ends of the diesel generating set silencer are connected with the corresponding diesel generating set smoke exhaust pipes respectively, and the tail section diesel generating set smoke exhaust pipe is connected with the transverse pipe at the top of the inverted U-shaped stern smoke exhaust pipe.