JPH03213932A - Ventilation system of welding shop or the like - Google Patents

Abstract

PURPOSE:To prevent a fume smoke from flowing toward the leeward side by suspending a curtain of a curtain device provided at the ceiling, simultaneously when a smoke sensor senses the fume smoke produced in the welding work. CONSTITUTION:A smoke sensor 4 is set at a height of a welding shop wherein a working table 1 is provided, while a curtain device 5 is fitted to the ceiling. Simultaneously, when a fume smoke produced in welding work is sensed by the smoke sensor 4, the curtain device is operated to suspend a curtain 6 and thereby a flow of the fume smoke toward the leeward side is interrupted. Accordingly, air from a blower 2 is directed effectively to a roof fan 3, the fume smoke is sent collectively into the roof fan 3 and thus ventilation is performed efficiently. Therefore, the number of roof fans 3 can be lessened, while an adverse effect on an operator is removed, since the fume smoke is not scattered in the shop.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a ventilation system for a welding workshop or the like.

"Conventional technology" During welding work, fume is generated.

Inhaling this fume smoke has an adverse effect on the lungs, so sufficient ventilation must be maintained in the welding workshop.

For this reason, a system as shown in FIG. 2 has conventionally been used to ventilate a welding workshop.

In FIG. 2, A is a loop fan attached to the roof of the welding workshop, which sucks fume smoke rising from high places inside the welding workshop and discharges it outdoors. B is a blower that is set on the floor of the welding workshop and blows rising fume smoke toward loop fan A.

Incidentally, C indicates fume smoke.

In such a conventional system, since the air from the blower hits the fume smoke obliquely from below, there is a problem in that part of the fume smoke is swept away to the leeward side. If some of the fume smoke is swept away in this way, sufficient ventilation cannot be achieved unless multiple loop fans are installed along the direction in which the fume smoke flows. In addition, the fumes will be spread, contaminating areas where no welding work is being performed. Furthermore, if sufficient ventilation is not provided, fume smoke remaining in the room may gradually fall over time and be inhaled by workers.

``Problems to be Solved by the Invention'' The present invention has been made in view of the above points, and at the same time when a smoke detector detects fume smoke, a curtain device installed on the ceiling is activated to droop the curtain. In welding workshops, etc., the blower also operates to blow fume smoke toward the loop fan, allowing for efficient ventilation and preventing fume smoke from scattering. It is intended to provide a ventilation system.

"Means for Solving the Problems" The gist of the present invention is to blow fume smoke toward a loop fan attached to the roof of a welding workshop, etc., by a blower installed on the floor of the welding workshop, etc. In a ventilation system such as a welding workshop that blows fume smoke, when a smoke detector detects fume smoke, the curtain of a curtain device installed on the ceiling hangs down to block the flow of fume smoke to the leeward side. A ventilation system for a welding workshop or the like is characterized in that a blower also operates.

Furthermore, when the curtain is hanging down, a sensor is provided to detect when a crane or the like approaches, and the curtain is pulled up based on the detection by the sensor.

"Example" Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a detailed explanatory diagram of the present invention.

In the figure, 1 is a welding work table, and 2 is a blower installed on the floor of the welding work place. Further, the blower 2 is activated when a smoke detector (described later) detects fume smoke. 3 is a loop fan attached to the roof of the welding workshop above the welding workbench 1.

4 is a smoke detector installed at a high place in the welding workshop. Incidentally, it is desirable that the smoke detector 4 be installed at a location where fume smoke tends to accumulate.

Reference numeral 5 denotes a curtain device attached to the ceiling of the welding workshop, which is activated at the same time as the smoke detector detects fume smoke, and hangs down the curtain 6 to block the flow of fume smoke to the leeward side. The wind blown from the blower 2 installed on the floor is effectively directed to the loop fan 3.

Further, in the present invention, in addition to the smoke detector, a detector (not shown) is provided at a high place, and this detector detects the approach of a crane or the like and pulls up the drooping curtain. This makes it possible to avoid collisions with cranes and the like.

Further, when smoke is no longer detected by the smoke detector 4, the curtain 6, which had been hanging down, is pulled up.

"Effects of the Invention" According to the present invention, since the flow of fume smoke to the leeward side can be blocked by the curtain, the fume smoke can be sent all at once to the loop fan by the wind from the blower blowing diagonally from below. It is something. Therefore, ventilation can be performed extremely efficiently. Furthermore, the number of loop fans can be reduced compared to before, making it extremely economical. In addition, it is hygienic because it does not spread fume smoke into the workplace, and it is extremely effective in terms of the health of workers.

[Brief explanation of drawings]

FIG. 1 is a detailed explanatory diagram of the present invention, and FIG. 2 is an explanatory diagram of a conventional system. 1... Welding workbench 2... Blower 3... Loop fan 4... Smoke detector 5... Curtain device 6.
...Curtain Figure 2

Claims (2)

[Claims] (1) In the ventilation system of a welding workshop, etc., where a blower installed on the floor of the welding workshop, etc. blows fume smoke toward a loop fan attached to the roof of the welding workshop, etc., a smoke detector is installed. A welding workshop, etc., characterized in that, at the same time as fume smoke is detected, a curtain of a curtain device installed on the ceiling hangs down to block the flow of fume smoke to the leeward side, and at the same time, a blower is also activated. ventilation system. (2) The welding method according to claim (1), wherein when the curtain is hanging down, a sensor is provided to detect when a crane or the like approaches, and the curtain is pulled up based on the detection by the sensor. Ventilation systems for workplaces, etc.