CN201295487Y - Foam spray type fire extinguisher - Google Patents

Abstract

The utility model discloses a foam spray type fire extinguisher which comprises temperature probes, a temperature compensating line, a temperature changing box, a temperature changing device, a temperature controlling module, a PLC and a human-computer interface, wherein the temperature changing device and the temperature controlling module are assembled in the temperature changing box, the human-computer interface is assembled in a fire controlling cabinet, and each temperature probe is arranged on the connection of a high-pressure sleeve pipe and a main transformer and is connected with the temperature changing device arranged in the temperature changing box by the temperature compensating line. Because the temperature probes of the foam spray type fire extinguisher are fixed on the root of the high-pressure sleeve pipe arranged on the surface of the main transformer, the temperature sensing probing measurement accuracy of the probes is high, and the surface temperature of the main transformer is displayed in a digital mode and is convenient to observe. The utility model has simple structure, high reliability and convenient use and maintenance and supplies reliable protective measures for the operation of the transformer.

Description

Foam spray fire extinguisher

Technical field

The utility model relates to a kind of fire extinguisher, refers in particular to the special-purpose foam spray fire extinguisher into fire-fighting fire extinguishings such as oil immersed power transformer, Oil-burning Boiler Room, fuel electric generator room, small-sized oil storage tank, kart storehouse, small-sized freight car temporary repairing shed, small-sized oil depots.

Background technology

At present, the fixed extinguishing system of domestic transformer adopting mainly is a water spray fire extinguish system, and this is to be applied to outdoor large transformer fire-fighting a kind of fixed extinguishing system the earliest.This system is by underground conservation pool, intake pipe, fire pump, descend fire chief net, water spray by-pass valve control, transformer water atomizing standpipe, horizontal branch pipe, atomizer, starting mode of pump control and protective device etc. to form annularly.In the winter of cold, the water capacity in the water tower is easily frozen and the bursting by freezing pipeline, because variable frequency pump is in the speed governing operating condition all the time, because of impurity in the water weares and teares very big to pump, compare with the variable frequency pump in the running water system, supporting fire supply system such as water pump, pipe network takes up an area of greatly, cost is high, and the regular maintenance management also bothers.What at present general control mode adopted is that temperature sensing cable is wrapped on the transformer body, temperature feedback signal by temperature sensing cable is given fire alarm control unit, the shortcoming of this kind mode is because the maintainer steps on temperature sensing cable when overhauling main transformer disconnected easily, as fail in time to find, can the safety of main transformer be constituted a threat to.Research and develop a kind of simple in structurely, it is necessary that the user can come the different novel fire-fighting system of flexible combination with protection domain according to the fire type of protected body.

The utility model content

The technical problems to be solved in the utility model provides a kind of foam spray fire extinguisher, and this foam spray fire extinguisher is simple in structure, make up flexible and changeable, wide, the anti-adverse environment, convenient for installation and maintenance of its temp probe monitoring range.

The utility model will be separated fast technical problem and be realized by following scheme: foam spray fire extinguisher, form by temp probe (the electric group of PT100), temperature-compensating line, the warm man-machine interface that becomes case, is assemblied in the temperature transmitter in the temperature change case and controls thermal module, PLC, is assemblied in the Fire Control Cabinet.Described 4-10 temp probes are installed in the junction of bushing and main transformer, and every temp probe is coupled together by temperature-compensating line and the temperature change device that is contained in the temperature change case.Survey the main transformer temperature during temp probe, and the temperature compensated line of the temperature that detects sent to be contained in the temperature that temperature becomes in the case and become device, temperature becomes the current signal that device is converted into the temperature and resistance signal 4～20MA, be sent in the main transformer switch board in the temperature special module on the PLC, be sent to through PLC on the man-machine interface of switch board, a plurality of temperature sensing points of main transformer are carried out whole day monitoring in 24 hours.

Report by mistake in monitoring temperature in order to prevent temp probe, taked comparison program in the PLC program in switch board to rate of temperature change, when any one temp probe changes above fiducial value suddenly, system will point out by fault alarm, and when any temp probe damages, the temperature of probe detection or be maximum perhaps be minimum, and that passes through comparison program more all can fault alarm.In comparison program to before the main transformer 1S and 1S after its rate of change of temperature comparison must not exceed 5 ℃.

The utility model also comprises following scheme: described temp probe is contained in the waterproof safety cover, and at waterproof mounting cup external welding stainless steel brace, the stainless steel brace is fixed on the bushing root of main transformer by the Luo bolt.Main transformer moves in the open, and be contained in temperature and become temperature in the case and become actuator temperature and be controlled in-50～150 ℃ of scopes, ℃ be 4MA promptly-50, in the time of 150 ℃ 20MA.When the main transformer generation condition of a fire, since the position at easy firing place just with the junction of bushing, when being installed in many temp probes herein any temperature and surpassing 150 ℃ of design temperatures, will send sound and light alarm in the Fire Control Cabinet, after main transformer high-pressure side, medium voltage side, low-pressure side outage, can start froth fire extinguishing system main transformer is carried out quick extinguishing.

The utility model has the advantages that: foam spray fire extinguisher is simple in structure, reliability is high, working service is convenient, for the transformer operation provides reliable protective measure.

Because the temp probe of foam spray fire extinguisher is fixed on the root of main transformer surface high pressure sleeve pipe, its heat detection certainty of measurement height can show the main transformer surface temperature with digital form, is convenient to observe.The temp probe monitoring range is wide, anti-adverse environment, convenient for installation and maintenance.

Riches all the way arbitrarily when giving birth to fault when the point type temp probe, can pass through touch screen operation, it is masked, and do not participate in measuring warning, but this do not influence other detection circuit normal monitoring fire alarm.This has just guaranteed at the transformer run duration, in the time of can not going up the main transformer repair and replacement again owing to the heat detector fault, after its shielding, can not influence system's operation.Treat that main transformer has a power failure when safeguarding, after the heat detector fault is got rid of, its shielding removed that this heat detector can recover operate as normal again.

This foam spray fire extinguisher can replace traditional main transformer water spray fire-fighting system, uses it can reduce construction investment, and has solved the problem of arid area shortage fire demand water.Foam spray fire extinguisher can be applicable to the protective field of industries such as transformer station, power plant, storage tank farm, Oil-burning Boiler Room, petrochemical industry, boats and ships.

Description of drawings

Below in conjunction with accompanying drawing for an embodiment:

Fig. 1 is the three-dimensional view of main transformer

Fig. 2 is the vertical view of Fig. 1

Fig. 3 is the three-dimensional view that temperature becomes case

Fig. 4 is the three-dimensional view of temp probe

The specific embodiment

As Fig. 1, Fig. 2, shown in Figure 3,8 temp probe 1 horizontal directions of this foam spray fire extinguisher are installed in the junction of bushing 2 and main transformer 3, and every temp probe 1 is coupled together by the temperature change device 6 that temperature-compensating line 4 and temperature become in the case 5.As Fig. 2, shown in Figure 4, temp probe 1 is contained in the spherical waterproof safety cover 7, at spherical waterproof mounting cup 7 external welding stainless steel braces 8, is fixed on bushing 2 roots of main transformer 3 by the Luo bolt.

Claims (2)

1, foam spray fire extinguisher, form by the man-machine interface that temp probe, temperature-compensating line, temperature become case, are assemblied in the temperature transmitter in the temperature change case and control thermal module, PLC, are assemblied in the Fire Control Cabinet, it is characterized in that: described 4-10 temp probes are installed in the junction of bushing and main transformer, and every temp probe is coupled together by temperature-compensating line and the temperature change device that is contained in the temperature change case.

2, foam spray fire extinguisher according to claim 1 is characterised in that: described temp probe is contained in the waterproof safety cover, and at waterproof mounting cup external welding stainless steel brace, the stainless steel brace is fixed on the bushing root of main transformer by the Luo bolt.

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