JPH0572697U - Smoke prevention device for marine chimney - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a smoke chimney prevention device for a marine chimney that can take in a large amount of air, efficiently blow up exhaust gas, and prevent entrainment of exhaust gas in a living area. is there. [Configuration] In a chimney outer cylinder 2 of a marine chimney, the chimney outer cylinder 2
Air inlet 4 provided on the front of the top below the top plate 3 position
And an inner chimney cylinder 7 inside the chimney outer cylinder 2 from the air intake port 4 to branch to both port sides, join at the rear part of the chimney outer cylinder 2, and
The upper and lower two-stage duct 5 having a shape in which the flow cross-sectional area is narrowed from the front to the rear, the air outlet 6 provided on the rear surface of the chimney outer cylinder 2 that is the rear end of the duct 5, and the air outlet 6 is covered only above. The air blow-up guide 8 is opened, and the exhaust gas blown out from the chimney is discharged together with the air blown upward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for preventing smoke damage caused by exhaust gas discharged from a chimney mounted on a ship.

[0002]

[Prior Art]

 Conventionally, as a smoke pollution control device of this type, the applicant takes in the airflow generated during navigation from the front of the top of the chimney outer cylinder into the duct and blows it upward to the rear of the chimney inner cylinder, We have applied for a utility model registration to prevent the exhaust gas from entering the residential area. (For example, see the application on July 25, 1990, the application number: Japanese Patent Application No. 2-79564, and refer to the smoke chimney prevention device for a marine chimney).

[0003]

[Problems to be solved by the device]

 In the invention described in the prior art, in the invention of Japanese Patent Application No. 2-79564, the duct is provided on the top of the chimney outer cylinder, that is, on the top plate position, and from the top plate to the upper end of the chimney outer cylinder. In addition, the height of the air intake was limited, the air intake was wide, and the amount of air taken in was small, so exhaust gas could not be sufficiently blown up.

Further, since the air flow is blown out to the rear of the chimney inner cylinder, the blowout pressure of the exhaust gas immediately after it exits the outlet of the chimney inner cylinder may be higher than the flow pressure of the air flow, and the exhaust gas It had a problem that it could not be blown up sufficiently.

The present invention has been made in view of such problems of the conventional technology, and the purpose thereof is to take in a large amount of air and to efficiently blow up exhaust gas. The present invention aims to provide a smoke chimney prevention device for a marine chimney that can prevent the inclusion of exhaust gas in a living area.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention relates to a chimney outer cylinder of a marine chimney, and an air intake provided on a front surface of a top of the chimney outer cylinder below a top plate position of the chimney outer cylinder and the chimney outer cylinder from the air intake. A chimney inner tube is internally located inside and branched to both port sides, merges at the rear part of the chimney outer tube, and two upper and lower ducts having a shape in which the flow cross-sectional area is narrowed from the front to the rear, and the duct rear It is composed of an air outlet provided on the rear surface of the chimney outer cylinder, which is the end, and an air blow-up guide that covers the air outlet and opens only at the upper side, and blows out the exhaust gas from the chimney to the upper side. It is made to be discharged together with it.

[0007]

[Action]

 The air intake provided below the top plate position has a smaller height limitation than the air intake provided above the top plate position, which allows a large area of the air intake.

The air outlet provided on the rear surface of the outer stack of the chimney is slightly apart from the outlet of the inner cylinder of the chimney, so that the air can be blown upward at a position where the blowout pressure of the exhaust gas is lowered.

The air blowing guide that covers the air outlet and opens only upward guides the air blown from the air outlet upward toward the exhaust gas emitted from the chimney inner cylinder.

[0010]

【Example】

 An embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, a chimney outer cylinder 2 is provided so as to project on the upper structure 1 of the hull, and the chimney outer cylinder 2 is provided inside the chimney outer cylinder 2. A chimney inner cylinder 7 for auxiliary machinery is also pierced through the top plate 3.

An air intake port 4 is provided on the front surface of the top of the chimney outer cylinder 1 below the top plate 3 position, and a chimney inner cylinder 7 is internally provided in the chimney outer cylinder 1 from the air intake port 4 and branched to both port sides. Two ducts 5 are provided in the upper and lower stages, the ducts 5 merge at the rear of the chimney outer cylinder 1, and the duct 5 has a shape in which the flow cross-sectional area is reduced from the front to the rear.

An air blow-out port 6 is provided on the rear surface of the chimney outer cylinder 1 which is the rear end of the duct 5, and an air blow-up guide 8 which covers the air blow-out port 6 and is open only above is provided.

In this embodiment, the air flow generated during navigation is sucked into the duct 5 from the air intake 4, and the air flow passes through the duct 5 from the front side to the rear side. Since the area is narrowed, the flow velocity is increased, and after passing through the merging portion at the rear end of the duct 5, the air flow is blown upward from the air outlet 6 along the air blowing guide 8. The air flow pushes the exhaust gas discharged from the chimney inner cylinder 7 upward and prevents the exhaust gas from being trapped in the living area.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. In addition, since the air intake is provided below the top plate position of the chimney outer cylinder, which has a small height restriction, the area of the air intake can be wide, and a large amount of air can be taken in. An air outlet is provided on the rear surface of the outer cylinder, and the air is blown upward at the position where the blowout pressure of the exhaust gas is lowered, so the exhaust gas is blown up effectively and the exhaust gas is placed in the living area. Prevent getting caught.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment according to the present invention.

FIG. 2 is a schematic plan view of an embodiment according to the present invention.

[Explanation of symbols]

 1 Hull upper structure 2 Chimney outer cylinder 3 Top plate 4 Air intake 5 Duct 6 Air outlet 7 Chimney inner cylinder 8 Air blow-up guide

Claims (1)

[Scope of utility model registration request] 1. An outer cylinder of a chimney fixed to a ship,
An air intake is provided on the front surface of the top of the chimney outer cylinder below the top plate position, and a two-stage upper and lower duct is provided from the air intake, in which the chimney inner cylinder is internally located and branches to both port sides. , The duct merges at the rear of the chimney outer cylinder, and the duct has a shape in which the flow cross-sectional area is narrowed from the front to the rear, and an air outlet is provided on the rear surface of the chimney outer cylinder which is the rear end of the duct. A smoke pollution control device for a marine chimney, characterized in that an air blow-up guide that covers only the air outlet and is opened only upward is provided so as to discharge the exhaust gas from the chimney together with the air upward. ..