Abstract

Disclosed is a lift and rotation mechanism for a quick door-opening device. The power-output end of a motor I (21) of a lift component of the mechanism is connected to one end of a screw rod (22) and the other end of the screw rod (22) is connected to one end of a circular pipe (24); one end of a tubular body (23) is provided with a connection component (26), with one end of a coupling component (4) being connected to the connection component (26) via screws; the other end of the circular pipe (24) is removably connected to a circular door (5) by an annular connection (25); the output shaft of a motor II (31) of a rotary component (3) is removably connected to one end of a rotary shaft (32) provided within a supporting seat (33); the supporting seat (33) is removably connected to an end flange (51); and a circular disk (34) is removably connected to the other end of the rotary shaft (32), and the circular disk (34) is fixedly connected to the connection component (26). The mechanism has the advantages of achieving speedy activation and shutting of a large vertical quick door-opening device, simple operation, and safety and reliability.

IPC Classes  ?

• F16J 13/22 - Covers or similar closure members for pressure vessels in general with movement parallel to the plane of the opening
• F16J 13/00 - Covers or similar closure members for pressure vessels in general

Abstract

An optical fiber control system for safety early-warning includes a phase fading control and a polarization fading control or a phase fading control or a polarization fading control. A polarization modulator [202] is connected between a laser [101] and a first multiplex demultiplexer [203] in series. The first multiplex demultiplexer [203] is connected to a second multiplex demultiplexer [204] by means of three strands of optical fibers [1, 2, 3] respectively, wherein the three strands of optical fibers [1, 2, 3] are laid with the conduit in a same trench. An optical fiber interferometer is consisted of the two multiplex demultiplexer [203, 204] and two strands of optical fibers [1, 2]. The first multiplex demultiplexer [203] is connected to two photoelectric detectors [309, 310], and the outputs of the two photoelectric detectors [309, 310] are connected to two A/D [312,313] respectively. The outputs of the two A/D [312,313] are connected to a photoelectric signal processing circuit [311] respectively, and one output of the photoelectric signal processing circuit [311] is connected to a polarization controller [201], and the output of polarization controller [201] is connected to a polarization modulator [202] and connected to a phase modulator [206] which is connected to the first strand optical fiber [1], and the other output of the photoelectric signal processing circuit [311] is connected to a phase controller [205], and the output of the phase controller [205] is connected to the phase modulator [206] which is connected to the second strand optical fiber [2].

IPC Classes  ?

• G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
• F17D 5/02 - Preventing, monitoring, or locating loss
• G01D 5/353 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
• G01H 9/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means