Jet fan anti-falling early warning device

Abstract

The invention discloses a jet fan anti-falling early warning device which comprises a fan, wherein the fan is fixed on the top wall of a tunnel through a plurality of lifting ropes; a safe leading chain is arranged between the fan and the top wall of the tunnel and is connected with a tension sensor in parallel; the tension sensor is in signal connection with a control center; the upper end of the safe leading chain is connected with embedded iron or an anchoring part on the top wall of the tunnel; the lower end of the safe leading chain is connected with a lifting ring at the top of the fan; the extension cord of the safe leading chain penetrates through gravity center of the fan. With adoption of the jet fan anti-falling early warning device, and through additionally arranging the safe leading chain and the tension sensor, when any one of the lifting ropes fractures, the safe leading chain plays the supplementary role, and the tension sensor is pulled to send an alarm signal to the control center simultaneously, so that maintenance personnel can rapidly judge that which fan malfunctions to carry out timely maintenance and prevent an accident.

Description

technical field [0001] The invention relates to an early warning device, in particular to a device used for early warning against falling off of jet fans installed in road and railway tunnels. Background technique [0002] There are many road tunnels and railway tunnels in China, such as Zhongnanshan Tunnel, Xiangshan Railway Tunnel, and Qingyunshan Railway Tunnel, all of which are super-long tunnels. The train speeds in the railway tunnels are all above 200km / h. In order to meet the requirements of fire protection and ventilation , a lot of jet fans are installed on both sides of the track, about 100 meters to 150 meters, there are two sets of jet fans (2 sets or 3 sets for each assembly), although before installing the jet fans, the embedded parts are all Pull-out tests have been done, all of which meet the national requirements, but most of them are not equipped with anti-falling warning devices, such as linkages such as alarms when the fan is partially displaced or falls...

AI Technical Summary

Problems solved by technology

[0002] There are many road tunnels and railway tunnels in China, such as Zhongnanshan Tunnel, Xiangshan Railway Tunnel, and Qingyunshan Railway Tunnel, all of which are super-long tunnels. The train speeds in the railway tunnels are all above 200km / h. In order to meet the requirements of fire protection and ventilation , a lot of jet fans are installed on both sides of the track, about 100 meters to 150 meters, there are two sets of jet fans (2 sets or 3 sets for each assembly), although before installing the jet fans, the embedded parts are all Pull-out tests have been done, all of which meet the national requirements, but most of them are not equipped with anti-falling warning devices, such as the alarm when the fan is partially displaced or falls.

[0003] Some use infrared alarms. Although they can provide early warning, they can only measure one point. There are also infrared alarm devices that are fixed on the walls on both sides of the tunnel with anchor bolts. If one of the infrared alarm devices is misplaced, the entire device is useless.

Moreover, this device has limitations. It can be used in road tunnels, because the jet fan is installed more than 5 meters above the ground, and generally there are no obstacles in the space above 5 meters. This infrared alarm can be used. It is well known that this installation and Alignment is more troublesome

But this infrared alarm is not feasible for railways

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