A LNG gas-permeable mast for ro-ro passenger ships

Abstract

The present invention relates to an LNG gas ventilation mast for a ro-ro passenger ship, which may include a cylinder, a first ventilation pipe and a second ventilation pipe, wherein the cylinder is fixedly installed on an open deck at an angle toward the stern and has a first channel and a second channel extending in a length direction spaced apart from each other, a ventilation net and a rain cover are installed on the top of the first channel and the second channel, the first channel is divided into a plurality of chambers spaced apart from each other, the size of the chamber is positively correlated with the caliber of the first ventilation pipe, the caliber of the second ventilation pipe is smaller than the caliber of the first ventilation pipe, the first ventilation pipe extends a predetermined length in the chamber after passing through the open deck, and the second ventilation pipe extends to the top in the second channel after passing through the open deck. The present invention makes a reasonable division in the internal structure, has a compact structure, occupies a small space, and takes into account both functionality and aesthetics.

Description

Technical Field

[0001] The invention belongs to the field of ro-ro passenger ships, and in particular relates to an LNG gas venting mast of a ro-ro passenger ship. Background Art

[0002] Ro-Ro passenger ships have strict control over vibration and noise, and generally use electric propulsion systems and install multiple LNG dual-fuel generators. When LNG is used as fuel, the vent pipes of the LNG gas-related system contain flammable gas, and the end opening is a dangerous area. In order to reduce the distribution of dangerous areas, it is necessary to discharge them outward in a centralized manner and have a certain height, so a vent mast is required.

[0003] Although conventional LNG dual-fuel ships are also equipped with ventilation masts, the design of ventilation masts generally only considers economy and practicality, and there is a wide range of options for the location of the ventilation masts, which are generally arranged on the relatively open top deck. The shape is generally designed to be round or square, and is arranged perpendicular to the deck.

[0004] Ro-Ro passenger ship is a kind of ship used for sightseeing, and the ventilation mast is located on the open deck. The open deck of the Ro-Ro passenger ship is a valuable resource, which is used for passengers' leisure and entertainment. The ventilation mast arranged in the open area needs to occupy as little space as possible and avoid the passenger activity area as much as possible. The ventilation mast must meet the requirements of functionality, safety, reasonable location and aesthetics at the same time. Conventional ventilation mast design cannot meet these requirements at the same time. Summary of the invention

[0005] The present invention aims to provide a LNG gas-permeable mast for a ro-ro passenger ship that is both functional and aesthetically pleasing. To this end, the specific technical solution adopted by the present invention is as follows:

[0006] A LNG gas ventilation mast for a passenger and vehicle ship, which may include a cylinder, a first ventilation pipe and a second ventilation pipe. The cylinder is fixedly installed on an open deck at an angle toward the stern and has a first channel and a second channel extending in a length direction and spaced apart from each other. A ventilation net and a rain cover are installed on the top of the first channel and the second channel. The first channel is divided into a plurality of chambers spaced apart from each other, the size of the chamber is positively correlated with the caliber of the first ventilation pipe, the caliber of the second ventilation pipe is smaller than that of the first ventilation pipe, the first ventilation pipe extends a predetermined length in the chamber after passing through the open deck, and the second ventilation pipe extends to the top in the second channel after passing through the open deck.

[0007] Furthermore, the chambers are arranged in two rows of six.

[0008] Furthermore, the chamber in the middle is the largest, and the chamber adjacent to the second channel is the smallest.

[0009] Furthermore, the cylinder is large in the middle and small on both sides, and its cross section includes a rectangle in the middle and a first isosceles trapezoid and a second isosceles trapezoid on both sides. The cross section of the portion of the cylinder corresponding to the second channel is the second isosceles trapezoid.

[0010] Furthermore, the predetermined length is 1 / 4 of the length of the first channel.

[0011] Furthermore, discharge pipes are arranged at the bottom of the first channel and the second channel, and the discharge pipes are flush with the open deck.

[0012] Furthermore, a reinforcing toggle plate is provided at the bottom end of the cylinder.

[0013] Furthermore, an eye plate is arranged near the top of the cylinder, and the eye plate is used for tying the steel wire rope to prevent the air-permeable mast from shaking.

[0014] Further, the second passage is provided with a manhole and a climbing ladder, the manhole is arranged on the outer side and is installed with a manhole cover, and the climbing ladder is arranged on the inner side opposite to the manhole.

[0015] Furthermore, the inclination angle of the cylinder is 60-70 degrees.

[0016] The present invention adopts the above technical solution, which has the beneficial effects of: the air-permeable mast of the present invention is improved in appearance, and the aesthetics is improved; and the internal structure is reasonably divided, the structure is compact, and the space occupied is small; and both functionality and aesthetics are taken into account. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0018] Figure 1 is a perspective view of the LNG gas-permeable mast of a ro-ro passenger ship of the present invention;

[0019] Figure 2 yes Figure 1 The rear view of the LNG gas vent mast of the ro-ro passenger ship is shown;

[0020] Figure 3 yes Figure 1 A side view of the LNG gas vent mast of a ro-ro passenger ship is shown;

[0021] Figure 4 is along Figure 3The cross-section of the LNG gas vent mast of the ro-ro passenger ship taken along the AA line;

[0022] Figure 5 is along Figure 3 The cross-section of the LNG gas vent mast of the ro-ro passenger ship taken along the BB line;

[0023] Figure 6 is along Figure 3 The cross-section of the LNG gas vent mast of the ro-ro passenger ship taken along the CC line;

[0024] Figure 7 is along Figure 3 A cross-sectional view of the LNG gas vent mast of a ro-ro passenger ship taken along the DD line. DETAILED DESCRIPTION

[0025] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1-7 As shown, a LNG gas ventilation mast for a ro-ro passenger ship may include a cylinder 1, a first ventilation pipe 2 and a second ventilation pipe 3. The cylinder 1 is fixed on the open deck 100 and has a certain height, so that the dangerous area is in a safe position. The cylinder 1 is designed as an inclined type (inclined toward the stern) to make the ro-ro passenger ship harmonious and beautiful as a whole. The inclination angle θ of the cylinder 1 is generally not less than 60 degrees. The cylinder 1 has a first channel 11 and a second channel 12 extending in the length direction and spaced from each other. The first channel 11 and the second channel 12 are arranged front and back, that is, the first channel 11 is on the stern side and the second channel 11 is on the bow side. A breathable net 4 and a rain cover 5 are installed on the top of the first channel 11 and the second channel 12. The main function of the breathable net 4 is to prevent birds from entering, but it should not be too dense to prevent poor exhaust. The total effective through-hole area of ​​the breathable mesh 4 should not be less than the total cross-sectional area of ​​all the ventilation pipes to ensure the exhaust effect. The first passage 11 is divided into a plurality of chambers 11a-11f spaced apart from each other, and the size of the chambers 11a-11f is positively correlated with the caliber of the first air pipe 2, that is, the larger the caliber of the first air pipe 2, the larger the corresponding chamber. After the first air pipe 2 passes through the open deck 100, it extends in the chambers 11a-11f for a predetermined length (for example, more than 5 cm), and the gas discharged from the first air pipe 2 can continue to flow upward through the chambers 11a-11f, and finally be discharged through the air mesh 4, that is, the chambers 11a-11f are equivalent to the extension of the first air pipe 2, so that the space can be effectively utilized, and there is no need to consider the installation space of the air pipe. The caliber of the second air pipe 3 is smaller than that of the first air pipe 2. After the second air pipe 3 passes through the open deck 100, it extends to the top in the second passage 12 so that the gas can be discharged from the air mesh 4. The second air pipe 3 is close to the two side walls of the second passage 12 to facilitate installation and maintenance.

[0027] In the illustrated embodiment, the chambers 11a-11f are arranged in two rows of six, wherein the two middle chambers 11c and 11d are the largest and are used for TCS ventilation, the two chambers 11e and 11f adjacent to the second passage 12 are the smallest and are used for double-walled pipe ventilation, and the remaining two chambers 11a-11b are used for TCS safety valve exhaust to the atmosphere.

[0028] In the illustrated embodiment, the cylinder 1 is large in the middle and small on both sides, and its cross section includes a rectangle in the middle and a first isosceles trapezoid and a second isosceles trapezoid on both sides, wherein the equal angle and height of the second isosceles trapezoid are greater than the first isosceles trapezoid. The cross section of the portion of the cylinder 1 corresponding to the chambers 11a and 11b of the first passage 11 is a first isosceles trapezoid, and the cross section of the portion of the cylinder 1 corresponding to the second passage 12 is a second isosceles trapezoid. In other words, the appearance of the air-permeable mast is arranged in an inclined manner toward the stern, and the cross section is a bilaterally symmetrical polygon as a whole. The bow and stern ends are designed in an isosceles trapezoid, which is conducive to reducing wind resistance and visually increasing beauty.

[0029] The cylinder cavity (i.e., the second passage 12) where the second vent pipe 3 is located needs to be provided with a manhole and a climbing ladder 7 for personnel to enter for installation and maintenance. The manhole is provided on the side without the second vent pipe 3 (i.e., the outside) for easy entry. A manhole cover 6 is provided on the manhole to prevent foreign matter and rainwater from entering. The climbing ladder 7 is provided on the side inclined toward the stern (i.e., the inside), opposite to the manhole, for easy climbing and higher safety.

[0030] In order to further prevent water accumulation in the ventilating mast due to condensation of water on the bulkhead, a discharge pipe 8 is provided at the bottom of the first channel 11 and the second channel 12. The height of the discharge pipe 6 is lower than that of the first ventilating pipe 2 and is flush with the open deck 100, which effectively drains water and prevents accumulated water from flowing into the first ventilating pipe 2.

[0031] In order to ensure strength, a reinforcing bracket 9 is provided at the bottom of the cylinder 1. In addition, an eye plate 101 is provided near the top of the cylinder 1 for tying a steel wire rope 102 to strengthen the air-permeable mast. The angle of the steel wire rope 102 can be adjusted as needed. In addition to preventing the air-permeable mast from shaking, it can also be used to hang decorations such as colorful flags to increase the aesthetics.

[0032] The materials of the cylinder 1, the first air pipe 2, the second air pipe 3, the wire rope 10, the manhole cover 6 and the climbing ladder 7 are all made of stainless steel of the same grade, which can effectively prevent corrosion.

[0033] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A LNG gas venting mast for a ro-ro passenger ship. It is characterized in that The invention comprises a cylinder, a first air vent and a second air vent. The cylinder is fixedly installed on the open deck at an angle toward the stern and has a first channel and a second channel extending in the length direction and spaced apart from each other. A breathable net and a rain cover are installed on the top of the first channel and the second channel. The first channel is divided into a plurality of chambers spaced apart from each other, the size of the chamber is positively correlated with the caliber of the first air vent, the caliber of the second air vent is smaller than the caliber of the first air vent, the first air vent extends a predetermined length in the chamber after passing through the open deck, and the second air vent extends to the top in the second channel after passing through the open deck; the chambers are arranged in two rows of six, the middle chamber is the largest, and the chamber adjacent to the second channel is the smallest; the cylinder is large in the middle and small on both sides, and its cross section includes a rectangle in the middle and a first isosceles trapezoid and a second isosceles trapezoid on both sides, and the cross section of the part of the cylinder corresponding to the second channel is the second isosceles trapezoid.

2. The LNG gas vent mast for a ro-ro passenger ship as claimed in claim 1, It is characterized in that The predetermined length is 5-20 cm.

3. The LNG gas vent mast for a ro-ro passenger ship as claimed in claim 1, It is characterized in that Drain pipes are arranged at the bottom of the first channel and the second channel, and the drain pipes are flush with the weather deck.

4. The LNG gas vent mast for a ro-ro passenger ship as claimed in claim 1, It is characterized in that A reinforcing toggle plate is arranged at the bottom end of the cylinder.

5. The LNG gas vent mast for a ro-ro passenger ship as claimed in claim 1, It is characterized in that An eye plate is arranged near the top of the cylinder, and the eye plate is used for tying the steel wire rope to prevent the air-permeable mast from shaking.

6. The LNG gas vent mast for a ro-ro passenger ship as claimed in claim 1, It is characterized in that The second passage is provided with a manhole and a climbing ladder, the manhole is arranged on the outer side and is installed with a manhole cover, and the climbing ladder is arranged on the inner side opposite to the manhole.

7. The LNG gas vent mast for a ro-ro passenger ship as claimed in claim 1, It is characterized in that The inclination angle θ of the cylinder is 60-70 degrees.

Images