CN214151911U - Automatic alarm system for shield construction railcar to pass station on site - Google Patents

Abstract

The utility model discloses a shield constructs construction railcar and crosses on-the-spot station automatic alarm system, including audible-visual annunciator, set up A early warning point and B early warning point department at job site both ends and be provided with the control mechanism that controls audible-visual annunciator opens and stop respectively; the control mechanism comprises a B-direction stop switch and an A-direction start switch which are arranged at an early warning point A at intervals; the B-direction starting switch and the A-direction stopping switch are arranged at the B early warning point; the A-direction starting switch and the B-direction starting switch control the audible and visual alarm to work through the control circuit, and the B-direction stopping switch and the A-direction stopping switch control the audible and visual alarm to be turned off in a delayed mode through the control circuit. The utility model changes the traditional manual protection idea into automatic alarm, which is safe and reliable and saves manpower; the whole system has low manufacturing cost, convenient maintenance and outstanding economic benefit; the sound and the light alarm at the same time, and the response speed is high; the manual and automatic switching is convenient, and the use is more convenient.

Description

Automatic alarm system for shield construction railcar to pass station on site

Technical Field

The utility model relates to an alarm system especially relates to a shield constructs construction railcar and crosses on-the-spot station automatic alarm system.

Background

With the rapid development of Chinese economy and the acceleration of urbanization process, the urban rail transit engineering construction in China gradually enters the climax. In urban rail transit construction, shield tunnel construction is a main construction method for urban rail transit tunnel construction due to high safety and high construction speed. The requirements for introducing new technologies and new processes in the construction process are increasing day by day, and the quality improvement and the efficiency improvement become problems which are urgently needed to be solved by each construction enterprise.

In order to improve the working efficiency, the cross operation on the construction site is a common condition. In the construction process, in order to guarantee the safety of constructors, the constructors are warned early by adopting the traditional manual protection modes such as flag marking, number blowing, mouth shouting and the like. However, the protection mode only depends on the responsibility of protection personnel, and has low safety and high protection cost. If constructors construct on the station track or construct on the track side and suddenly meet the passing of a rail car, the traditional manual protection method can bring life danger to maintenance personnel if early warning cannot be timely carried out. Aiming at the situation, the device capable of automatically alarming when the shield construction railcar passes through a construction site is invented, so that not only can the protection cost be saved, but also accidents can be eliminated in sprouts, and the life safety of constructors can be better ensured.

Disclosure of Invention

An object of the utility model is to provide a shield constructs construction railcar and crosses on-the-spot station automatic alarm system, has changed the passive mode of traditional artifical protection, to on-the-spot construction cross operation or overhaul at the station track, plays reliable early warning effect.

In order to achieve the above purpose, the utility model can adopt the following technical proposal:

shield constructs construction railcar and crosses on-the-spot station automatic alarm system, including an audible-visual annunciator, set up and be provided with control respectively at the A early warning point and the B early warning point department at job site both ends audible-visual annunciator opens the control mechanism who stops.

The control mechanism comprises a B-direction stop switch and an A-direction start switch which are arranged at the early warning point A at intervals; the B-direction starting switch and the A-direction stopping switch are arranged at the B early warning point; the A-direction starting switch and the B-direction starting switch control the audible and visual alarm to work through the control circuit, and the B-direction stopping switch and the A-direction stopping switch control the audible and visual alarm to be turned off in a delayed mode through the control circuit.

The B-direction stop switch, the A-direction start switch, the B-direction start switch and the A-direction stop switch are all infrared 24V diffusion type photoelectric switches.

The audible and visual alarm adopts an external alarm megaphone and a warning lamp.

The utility model has the advantages that the protection idea of manual monitoring is changed, the fatigue and laziness of long-time manual monitoring are eliminated, the safety and reliability are higher, the manufacturing cost of the whole system is low, the maintenance is convenient, and the economic benefit is outstanding; the voice and the light alarm at the same time, the response speed is high, the early warning is more reliable, and the manpower is greatly saved; the manual and automatic switching is convenient, and the use is more convenient.

Drawings

Fig. 1 is a layout diagram of the present invention.

Fig. 2-4 are schematic diagrams of control circuits according to embodiments of the present invention.

Detailed Description

The present invention is described in more detail below with reference to specific examples to facilitate understanding for those skilled in the art.

This application explains with setting up early warning system at shield construction station both ends entrance to a cave as an example:

as shown in fig. 1, the automatic alarm system for the shield construction railcar to cross the site station comprises an audible and visual alarm, which is used in the construction site with high noise, so that the alarm system adopts the external alarm 1 and the light alarm 2 which are connected in parallel to perform early warning simultaneously, and the alarm 1 and the light alarm 2 are placed in the construction sites at two ends of the station;

the early warning point A and the early warning point B are respectively arranged at the positions 30 meters away from the openings at the two ends of the station, and the distance is about 265 meters; the alarm system can be activated and deactivated from two pre-warning points.

Two infrared 24V diffusion type photoelectric switches with the distance of 2.5 meters are arranged at the early warning point A: the 1# B directional stop switch and the 2# A directional start switch, wherein the 1# B directional stop switch is a stop switch for audible and visual alarm when the rail car runs from the point B to the point A, and the 2# A directional start switch is a start switch for audible and visual alarm when the rail car runs from the point A to the point B;

two infrared 24V diffusion type photoelectric switches with the distance of 2.5 meters are arranged at the early warning point B: and the 3# B directional starting switch and the 4# A directional stopping switch, wherein the 3# B directional starting switch is a starting switch for the audible and visual alarm when the rail car runs from the point B to the point A, and the 4# A directional stopping switch is a stopping switch for the audible and visual alarm when the rail car runs from the point A to the point B.

The four switches are respectively connected with a control circuit (arranged in the control cabinet 3) through 3 multiplied by 1.5 copper core cables, so that the reliability of early warning is ensured.

In order to ensure that field construction personnel evacuate to the outside of the safe distance of the track at the first time, the sound-light alarm is rapidly alarmed through the control circuit after the track car enters the early warning distance from the 2# A direction starting switch and the 3# B direction starting switch; and after the rail car passes by, the 1# B direction stop switch and the 4# A direction stop switch control the audible and visual alarm to be switched off in a delayed mode (generally 1-2 minutes can be set) through the control circuit, so that the rail car is guaranteed to leave a construction area within alarm time, and the occurrence of rail car collision accidents is effectively prevented.

This application chooses infrared ray 24V diffusion type photoelectric switch as 1# B to stop switch, 2# A to start switch, 3# B to start switch and 4# A to stop switch, and stability is good, long service life, and the precision is high, and response speed is fast, and is small, has guaranteed alarm system's operational reliability.

The operation of the rail car has two directions, the following takes the operation of the rail car from a point A to a point B as an example to describe the alarm system in detail, and the principle of the operation of the rail car from the point B to the point A is the same. Circuit control schematic referring to fig. 2-4.

(1) When the rail car runs from the point A to the point B, the rail car firstly passes through the 1# B direction stop switch, the 1# B direction stop switch detects that an object (the rail car) exists, but the corresponding KA1 intermediate relay does not act at the moment, and the alarm cannot be started (because the starting of the 1# B direction stop switch is controlled by the normally open point of the AC contactor KM2, the rail car does not start the AC contactor KM2 from the point B, and the line from the 1# B direction stop switch is disconnected, the 1# B direction stop switch does not act);

(2) the railcar continues to advance, reach 2# A to starting switch, 2# A detects when having the object to starting switch this moment, 2# A starts to starting switch, the corresponding KA2 auxiliary relay coil gets electric, KA2 auxiliary relay normally open point is closed, AC contactor KM1 coil gets electric, KA2 auxiliary relay normally closed disconnection simultaneously, KA3 auxiliary relay control line disconnection, protection KA2 auxiliary relay and KA3 auxiliary relay can not start simultaneously. The alternating current contactor KM1 is electrified and self-locked, the main contact of the alternating current contactor KM1 is closed, the audible and visual alarm is switched on, the light alarm 2 begins to flash and give an alarm, and the audible alarm (the alarming megaphone 1) is started at the same time, the train comes and requires construction workers to be away from a track to pay attention to safety and go back to the home safely (the audible alarm adopts the alarming megaphone with the power of 50W and the recording time of 120 seconds, the audio alarm can be played circularly, the power supply adopts the alternating current AC220V to convert the direct current DC-12V-5W switching power supply and is arranged in a distribution box, the + -pole of the switching power supply is connected with a DC-12V external plug, the DC-12V external plug is connected with a DC-12V external jack to ensure the power supply of the megaphone, in addition, two ends of a master switch of the alarming megaphone are connected in parallel with two wires, namely, an external remote control switch of the alarming megaphone is welded and firmly led to the outside, and the alternating current contactor KM1 is connected with the alternating current contactor KM1 at a normally open point, the alternating current contactor KM1 is switched on and off to control the megaphone to open and close, and the power-on time of the alternating current contactor KM1 is the megaphone. The loudspeaker has the sound amplification distance of 200-800 meters) to warn field constructors, so that the constructors can timely evacuate from the safe distance of the track, and the occurrence of the accident of colliding rail cars is prevented;

(3) the rail car continues to move to the point B, when the rail car moves to the starting switch of the point 3# B, the starting switch of the point 3# B cannot be electrified, and because the KA2 intermediate relay corresponding to the starting switch of the point A2 # A and the KA3 intermediate relay corresponding to the starting switch of the point B3 # B are in an interlocking state, only the KA3 can be started after the KA2 stops. Similarly, when the KM1 is in a power-on state, the KM2 AC contactor cannot be powered on, the AC contactor KM1 control circuit is connected in series with the AC contactor KM2 normally closed contact, the AC contactor KM2 control circuit is connected in series with the AC contactor KM1 normally closed contact, and two control circuits are controlled mutually to play an interlocking role.

(4) When the rail car continuously moves forward to reach the detection range of a point B4 # A direction stop switch, the 4# A direction stop switch acts, a KA1 intermediate relay is switched on, a KA1 intermediate relay is switched on to be switched on to a KA5 intermediate relay, the KA5 intermediate relay is electrified and self-locked, a KT1 time relay is switched on simultaneously, KT1 starts to time for 2 minutes, KT1 reaches the timing time of 2 minutes (the length of the rail car is about 80 meters, the rail car runs at the speed of 5 kilometers per hour, the time of the front end and the tail end of the rail car passing through the 4# A direction stop switch needs 1 minute or more, so the set time is longer than the actual running time to ensure that the rail car passes through within the alarm time), the KM1 power supply is switched off normally, and the sound and light alarm stops.

The utility model discloses an automatic alarm system has still set up manual mode, and when the railcar passed through, the protection personnel pressed the start button and will report to the police, pressed stop button again after the railcar is under construction the station, can stop reporting to the police.

If the manual protection mode is calculated according to 8 hours per shift every day, a worker needs to be kept on duty at the railway side of the construction site, the labor cost is about 600 yuan, and if the manual protection mode is calculated according to two shifts every day, the labor cost is increased to 1200 yuan. The actual manufacturing cost of the automatic alarm system is only about 2000 yuan, so that the protection cost is greatly reduced.

The utility model discloses a shield constructs construction railcar and crosses two kinds of warning modes of on-the-spot station and use sound and light simultaneously, to site operation cross operation, the workman overhauls at the station track, and the walking homoenergetic plays fine warning effect on the track, changes into the automatic alarm protection with the artifical protection working method of tradition that originally used, has practiced thrift the project cost, has improved the working efficiency.

Claims (4)

1. The utility model provides a shield constructs construction railcar and crosses on-the-spot station autoalarm system which characterized in that: the early warning device comprises an audible and visual alarm, and control mechanisms for controlling the audible and visual alarm to start and stop are respectively arranged at an early warning point A and an early warning point B which are arranged at two ends of a construction site.

2. The shield construction railcar passing site station automatic alarm system according to claim 1, characterized in that: the control mechanism comprises a B-direction stop switch and an A-direction start switch which are arranged at the early warning point A at intervals; the B-direction starting switch and the A-direction stopping switch are arranged at the B early warning point; the A-direction starting switch and the B-direction starting switch control the audible and visual alarm to work through the control circuit, and the B-direction stopping switch and the A-direction stopping switch control the audible and visual alarm to be turned off in a delayed mode through the control circuit.

3. The shield construction railcar passing site station automatic alarm system according to claim 1, characterized in that: the B-direction stop switch, the A-direction start switch, the B-direction start switch and the A-direction stop switch are all infrared 24V diffusion type photoelectric switches.

4. The shield construction railcar passing site station automatic alarm system according to claim 1, characterized in that: the audible and visual alarm adopts an external megaphone for police and a light alarm.

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