KR101113012B1 - Smoke detection device for duct - Google Patents

Abstract

PURPOSE: A smoke detection apparatus for a ventilating duct is provided to reduce installation costs without sampling plumbing. CONSTITUTION: A smoke detection apparatus comprises a smoke detection box(110), a smoke detector(120), a smoke inlet path(130), a smoke outlet path(140), a smoke collector(150), and a strainer(160) for eliminating dust. The smoke detection box forms an inlet port and an outlet port. The smoke detector is prepared in the smoke detection box. One end of the smoke inlet path is connected to the inlet port of the smoke detection box. The other end of the smoke inlet path is connected with the inside of the ventilating duct. The smoke collector is prepared in a wall of the ventilating duct in a hemi spherical shape and communicates the inside of the ventilating duct and the smoke inlet path. One end of the smoke outlet path is connected with the outlet port of the smoke detection box. The other end of the smoke outlet path is connected with the inside of the ventilating duct.

Description

Smoke detection device for ventilation ducts {SMOKE DETECTION DEVICE FOR DUCT}

The present invention relates to a smoke detection device installed in the ventilation duct.

Smoke detectors are installed to quickly detect fires in cargo holds.

In the case of such a smoke detection device, a smoke accumulator is provided in a cargo place, and a sampling pipe is connected from the smoke accumulator to the control panel so that the smoke accumulates in the smoke accumulator and flows through the sampling pipe to the control panel. Smoke was detected on the control panel.

On the other hand, Section 2.3.1 of Chapter 10 Sample Extraction Smoke Detection System of the revised FSC Code, effective from January 1, 2012, has been revised as follows.

"Smoke accumulators shall be located as high as possible in the ceiling or protected area. At least one additional fume accumulator shall be provided on top of each ventilation duct, which shall be fitted with suitable filtering devices to prevent contamination by dust. Must be installed. "

As a result of these changes, the installation of smoke accumulators is mandatory for each ventilation duct of a ship.

However, if the smoke accumulator is installed according to the conventional method, it is necessary to pipe piping work that must install a sampling pipe connecting to the control panel for each smoke accumulator. However, as compared to the case of installing in the cargo hold as in the prior art, a lot of ventilation ducts are installed in the ship, and if so, a problem arises that numerous sampling pipes for each ventilation duct must be installed.

On the other hand, Korean Patent Publication No. 10-2008-0089167 "Smoke detector and its sampling air supply method" (published October 6, 2008), Korean Patent Publication No. 10-2010-0041796 as a conventional technology related to the present invention "Smoke Detector, Smoke Detection Method and Separator" (published April 22, 2010) and the like have been proposed, and the prior art is considered to be incorporated herein without further explanation.

Korean Patent Publication No. 10-2008-0089167 "Smoke detector and its sampling air supply method" (published 6 October 2008) Korean Patent Publication No. 10-2010-0041796 "Smoke detector, smoke detection method and separator" (published April 22, 2010)

According to the present invention, when a smoke accumulator is installed in each ventilation duct according to the revision of the above regulations, a smoke detector is installed around each ventilation duct so that sampling pipe piping is unnecessary at all, and the smoke detector is connected to the control panel. The objective is to adopt a way of connecting.

This eliminates the need for sampling pipe piping, reducing the overall installation cost and increasing the detection effect.

In order to solve the above problems, the present invention provides a smoke detection device for detecting smoke passing through the ventilation duct, comprising: a smoke detection box each having an inlet and an outlet; A smoke detector provided inside the smoke detection box; A smoke inflow path having one end connected to the inlet of the smoke detection box and the other end communicating with the inside of the ventilation duct; A smoke outflow passage having one end connected to an outlet of the smoke detection box and the other end communicating with the inside of the ventilation duct, and the other end opened toward a downstream side in the fluid flow direction of the ventilation duct; Characterized in that comprises a.

In the above, the smoke outlet is preferably bent in the form of "L" in the interior of the ventilation duct toward the downstream side of the fluid flow direction of the ventilation duct.

In the above, it is preferable that the flow path cross-sectional area of the said smoke inflow path is 1/2 or less 1/250 or more of the flow path cross-sectional area of the said smoke inflow path.

In the above, it is preferable that a smoke accumulator is provided in the ventilation duct, and the other end of the smoke inlet passage communicates with the ventilation duct through the smoke accumulator, and a strainer for removing dust is provided in the smoke inlet passage.

In the above, the smoke detector may be to transmit a smoke detection signal to the external control panel through the wire.

As described above, in the present invention, a smoke detector may be installed around each ventilation duct so that sampling pipe piping is unnecessary at all, and the smoke detector may be wired to the control panel, thereby reducing the installation cost of the overall apparatus and detecting smoke. The effect can be enhanced.

1 is a conceptual diagram of an embodiment according to the present invention installed in a ventilation duct.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

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

1 is a conceptual diagram of an embodiment according to the present invention installed in the ventilation duct.

This embodiment is largely smoke detection box 110, smoke detector 120, smoke inlet 130, smoke outlet 140, smoke collector 150, dust removal strainer 160 )

In the drawing, reference numeral 10 denotes a ventilation duct, and reference numeral 11 denotes a fan 11 installed in the ventilation duct 10.

Air flows from A to B by the fan 11 installed in the ventilation duct 10. That is, the arrow direction in FIG. 1 is the fluid flow direction.

In the event of a fire, smoke will also flow in the direction of fluid flow.

In this embodiment, the smoke detection device is to be installed at the rear end of the fan (11).

The smoke detection box 110 is a hollow box shape, the inlet 111 and the outlet 112 are formed, respectively, is fixed to the upper portion of the ventilation duct (10).

A smoke detector 120 is provided inside the smoke detection box 110. The smoke detector 120 detects smoke and is connected to a control panel (not shown) provided at a remote location through a wire, and transmits a smoke detection signal to a control panel provided at a remote location through a wire. Therefore, since the connection between the smoke detector 120 and the control panel is completed by the wire work, the connection work becomes very simple.

A smoke inlet 130 is provided to communicate the inlet 111 of the smoke detection box 110 with the inside of the ventilation duct 10. That is, one end of the smoke inlet 130 is connected to the inlet 111 of the smoke detection box 110, the other end of the smoke inlet 130 is in communication with the interior of the ventilation duct (10).

A smoke outlet 140 is provided to communicate the outlet 112 of the smoke detection box 110 with the inside of the ventilation duct 10. That is, one end of the smoke outlet 140 is connected to the outlet 112 of the smoke detection box 110, the other end of the smoke outlet 140 is in communication with the interior of the ventilation duct (10).

The smoke cannot flow into the smoke detection box 110 only by connecting the smoke inflow path 130 and the smoke outflow path 140 with the inside of the ventilation duct 10.

In order to solve this problem, the pressure of the other end of the smoke outlet 140 is designed to be lower than the pressure of the other end of the smoke inlet 130, so that the smoke of the ventilation duct 10 is inside the smoke detection box 110 Can be introduced into. To this end, the other end of the smoke flow passage 140 is opened toward the downstream side of the fluid flow direction of the ventilation duct 10. Specifically, the smoke outflow path 140 is bent in the shape of an "L" in the interior of the ventilation duct 10 while facing the downstream side of the fluid flow direction of the ventilation duct 10 and the ventilation duct 10 and the end thereof. An opening 141 is formed in communication therewith. Therefore, the pressure of the opening 141 of the smoke outflow path 140 is caused by the flow of air generated inside the ventilation duct 10, and thus, the other end of the smoke inflow path 130, specifically, the smoke accumulator 150. The pressure is lowered.

The smoke accumulator 150 is connected to the other end of the smoke inlet 130, and the smoke accumulator 150 is provided in the ventilation duct 10.

Therefore, the other end of the smoke inlet 130 is in communication with the ventilation duct 10 through the smoke accumulator 150. As such, the smoke accumulator 150 is formed in a hemispherical shape to receive more smoke and is provided on the wall of the ventilation duct 10.

In addition, the smoke inlet 130 is provided with a strainer 160 for dust removal. The dust removal strainer 160 removes foreign substances such as dust included in the air flowing into the smoke detection box 110 to protect the smoke detector 120.

On the other hand, the air flow is connected to the smoke inlet 130, smoke detection box 110, the smoke outlet 140 by this structure, but because the flow rate is small, the smoke detector 120 is normally smoke The problem arises that it is difficult to detect.

To this end, the flow path cross section of the smoke flow path 140 should be designed to be much smaller than the flow cross section of the smoke flow path 130. Preferably, the cross-sectional area of the flow path of the smoke flow path 140 is preferably 1/2 or less 1/250 or more of the cross-sectional area of the flow path of the smoke inflow path 130.

If the flow path cross-sectional area of the smoke flow path 140 is larger than 1/2 of the flow path cross-section of the smoke inflow path 130, the time that the smoke stays in the smoke detection box 110 becomes very short, and thus the smoke detector 120 It becomes difficult to detect.

If the flow path cross section of the smoke flow path 140 is smaller than 1/200 of the flow cross section of the smoke inflow path 130, the smoke inflow path 130 is formed too large or the fluid flow hardly occurs to detect the smoke. Becomes difficult.

The operation of this embodiment will be described.

The fan 11 inside the ventilation duct 10 serves to discharge the air inside the space such as the cargo hold to the outside, so the flow velocity of the air inside the ventilation duct 10 is very fast. In general, the wind speed inside the ventilation duct of the cargo hold of the ship is about 8m / sec ~ 20 m / sec.

In this state, the smoke generated during the fire is quickly discharged to the outside by the fan 11, so it is very important to detect the smoke flowing along the inside of the ventilation duct 10.

In the case of a general smoke detector does not detect the smoke of such a high flow rate, a smoke detector as in the present embodiment is required.

In the present embodiment, since the other end of the smoke outflow path 140 has a lower pressure than the other end of the smoke inflow path 130, a part of the smoke flowing along the ventilation duct 10 is the smoke accumulator 150 and the smoke. The smoke is introduced into the smoke detection box 110 through the inflow path 130, and the smoke introduced into the smoke detection box 110 is discharged back to the ventilation duct 10 through the smoke outflow path 140.

At this time, since the smoke introduced into the smoke detection box 110 through the smoke inlet 130 exits the smoke outlet 140 with a small flow path area, the flow rate of the smoke detection box 110 is slowed and the smoke stays. As the time becomes longer, the accuracy of the smoke detection (ie, the fire detection) of the smoke detector 120 may be increased.

The above embodiment has been described taking the ventilation duct of the ship as an example, but the application field of the present invention is not limited thereto.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the embodiments described above are intended to be illustrative, but not limiting, in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

110: smoke detection box 120: smoke detector
130: smoke inlet 140: smoke outflow
150: smoke accumulator 160: dust removal strainer

Claims (5)

In the smoke detector for detecting smoke passing through the ventilation duct,
A smoke detection box having inlets and outlets respectively;
A smoke detector provided inside the smoke detection box;
A smoke inflow path having one end connected to the inlet of the smoke detection box and the other end communicating with the inside of the ventilation duct;
A smoke accumulator provided on a wall of the ventilation duct in a hemispherical shape and connected to the other end of the smoke inlet to communicate the inside of the ventilation inlet with the smoke inlet;
One end is connected to the outlet of the smoke detection box and the other end is in communication with the interior of the ventilation duct, the other end is bent in the "L" shape inside the ventilation duct while the downstream side of the fluid flow direction of the ventilation duct A smoke outflow opening towards;
It is made, including
The flow path cross-sectional area of the smoke outflow path is a smoke detection device for a ventilation duct, characterized in that less than 1/2 1/2 or more of the cross-sectional area of the flow path of the smoke inlet.
delete delete The method of claim 1,
Smoke detection device for a ventilation duct, characterized in that the smoke removal strainer is provided in the smoke inlet.
The method of claim 1,
The smoke detector is a smoke detection device for a ventilation duct, characterized in that for transmitting a smoke detection signal to the external control panel through a wire.

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