CN201120060Y

CN201120060Y - Electric-controlled automatic foam scale mixer of fire vehicle

Info

Publication number: CN201120060Y
Application number: CNU2007203058226U
Authority: CN
Inventors: 何永成; 孙凤明
Original assignee: BEIJING FIREFEND EQUIPMENT Co Ltd
Current assignee: BEIJING FIREFEND EQUIPMENT Co Ltd
Priority date: 2007-11-21
Filing date: 2007-11-21
Publication date: 2008-09-24
Anticipated expiration: 2017-11-21

Abstract

The utility model discloses a fire engine electronic control automatic foam proportioning device, which comprises a water pump, a foam inlet tube, a water pump inlet tube and a drainpipe, and is characterized in that the utility model further comprises a microcomputer control box, a foam flowmeter, a water flowmeter and an electronic control valve which are electrically connected with the microcomputer control box. The actual flow of the water pump and foam stock solution are respectively collected through the water flowmeter and the foam flowmeter, the opening degree of the valve is controlled through the treatment of a microcomputer in the microcomputer control box, thereby achieving a negative pressure type ring pump automatic proportioning system which is capable of accurately mixing the foam and the water under different working pressures and output flows of the water pump.

Description

The automatically controlled automatic bubble proportion mixer of a kind of fire fighting truck

Technical field

The utility model belongs to the fire-fighting equipment technical field, is specifically related to the automatically controlled automatic bubble proportion mixer of a kind of fire fighting truck.

Background technology

The regular-type foam fire fighting truck is to be the fire extinguishing vehicle of advocating war of main extinguishing chemical with the air PF.According to the extinguishing mechanism of foam, vehicle-mounted PF stoste (dope) must and an amount of water fully mix, and act on mutually through foaming machine and enough air and can produce the foam that meets extinguishment requirement.

At present the foam dope of seeing on the domestic market has 3% with the mixed proportion of water, i.e. 3% foam, and 97% water, 6% is 6% foam, two kinds in 94% water.

The concerned countries standard code of fire fighting truck: the proportion mixer that foam truck is equipped with can satisfy the instructions for use of above-mentioned two kinds of foam dopes, produces 3%～4% or 6%～7% mixed liquor respectively.

Traditional proportioner is manual, and 5 gears are only arranged.To the regulating handle of proportioner be transferred to correspondence position, and water-aspirator pressure is controlled in 0.7～1.2MPa scope and can uses according to the metered flow of foaming machine (foam monitor, foam gun) during use temporarily.Although this kind proportioner is simple in structure, process technology is comparative maturity also, has the problem of following several respects:

(1) fire fighter's skilled operation degree is had relatively high expectations: to accomplish that the scene of a fire collects one's faculties, and to select suitable handle position according to specification, the quantity of using foaming machine;

(2) owing to only 5 gears are arranged, the foaming machine that can not satisfy different size fully uses simultaneously, has limited the performance of fire-fighting efficiency, says in some sense, has also caused the waste of fire-fighting resource.Such as fire monitor is 24L/s, ratio can be mixed regulating handle during use and be transferred to 24 gear; If scene of a fire temporary needs is set out a foam gun simultaneously, that has only (flow is 8L/s) of using PQ8 because ratio mix to be regulated the relevant position of having only corresponding 32L/s, although scene of a fire reality only need PQ4's (flow is 4L/s) can not adopt;

(3) because the metering-orifice fixed size, when pump working pressure exceeded allowed band, below 0.6MPa, or 1.2MPa was when above, mixing ratio be not higher be exactly on the low side, system's operate as normal, foam quality does not reach extinguishment requirement;

(4) fire brigade is generally selected the mesolow pump for use for solving the fire extinguishing demand of remote water delivery or high-rise water delivery at present, and its operating pressure can reach 2.0MPa.The central pressure when using, the operating pressure of water pump is higher than the proportioner normal range of operation far away, has greatly limited the performance of pump performance; Can not spray foam when in other words, pressing in the use.

(5) the external fire monitor that has occurred adjusting automatically the water yield and expulsion pressure, and since its performance brilliance, existing at present part fire-fighting troop choosing dress, but manual proportioner can not supportingly use with it;

The mechanical automatic ratio blender of the fire pump manufacturer that we are domestic, properties of product are extremely unstable, and unsuccessful substantially, its main cause is the influence that is subjected to machining accuracy, car load design level and installment state.

The content of utility model

Problem to be solved in the utility model provides the automatically controlled automatic bubble proportion mixer of a kind of fire fighting truck, comprise water pump, foam inlet pipe, pump water inlet and drain pipe, it is characterized in that: also comprise microcomputerized control box and the foam flowmeter, water ga(u)ge, the electrically-controlled valve that are electrically connected with described microcomputerized control box.

Described electrically-controlled valve is installed in vacuum and produces on the pipe, and described vacuum produces on the pipe venturi nozzle is housed.

Described foam inlet pipe is provided with the feed liquor valve, and described water pump is provided with the water pump drain pipe.

Two forks are arranged behind the described feed liquor valve, and one the tunnel is automatic control piper, and foam flowmeter, electrically-controlled valve are housed on it, and another road is manual control piper, and hand control valve is housed.

On the described water pump drain pipe detergent line is housed, described detergent line is provided with cleaning valve, and described detergent line is behind described water ga(u)ge.

On the described water pump drain pipe detergent line is housed, described detergent line is before described water ga(u)ge.

The utlity model has following advantage:

Stable performance, can satisfy difference require ratio foam solution, different vehicle installation system, different flow water pump, different types water pump requirement.

Description of drawings

Fig. 1 is a principle schematic of the present utility model.

The specific embodiment

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is a principle schematic of the present utility model.

Water pump 10 outlet pipelines of the present utility model have three: article one is a drain pipe 12, and the liquid that mixes directly for fire-extinguishing apparatus provides the foam mixing liquid that meets the demands, has two forks from liquid outlet 15 ejections on the described drain pipe 12.Water ga(u)ge 5 should be installed in can satisfy flowmeter normally use, and must be after the fork of leading to the foams mix system, to gather the mixed liquor flow of actual output; Second produces pipeline 13 for the foams mix system vacuum, described vacuum produces establishes on the pipeline 13 with control valve 6, open described control valve 6, can from the water pump water outlet pipeline, introduce one press water, quicken to produce vacuum by venturi nozzle 7 reducings, suck the foam solution that foam inlet 11 is come in, and enter water pump 10, mix once more by pump water inlet road 16; Article three, be detergent line 19, because cleaning valve 2 controls are arranged, its unlatching is after finishing fire extinguishing, and water flow is not exerted an influence, and can be arranged on before or after the water ga(u)ge 5.

Foam feed tube 14 is provided with feed liquor valve 9, the foam dope enters foam feed tube 14 by foam inlet 11, tell two forks behind the described foam feed tube 14, the one tunnel is automatic control valve 17, and foam flowmeter 3, electrically-controlled valve 4 are housed on it, another road is manual control valve 18, hand control valve 8 is housed, and is the second cover hybrid mode of foaming system, though mixing ratio is very inaccurate, flow-controllable only has several class, but its existence can improve the reliability of whole system;

Be explanation below to " negative pressure ", " ring pump ":

" negative pressure " is meant that foam dope is the negative pressure that is lower than atmospheric pressure that produces by venturi nozzle 7 and obtaining;

" ring pump " is meant that going out one mixed liquor from the pumping line pass mixes with foam dope at venturi nozzle 7, returns water pump 10 and dilutes, exports, and forms the circulation around water pump, finishes ratio mixing continuously.

Microcomputerized control box 1 principle:

(1) is provided with water ga(u)ge 5 and foam flowmeter 3 in the system, after foams mix work begins, constantly gathers the flow information of water and foam dope respectively and pass to microcomputerized control box 1;

(2) microcomputerized control box 1 can be converted into information the signal of telecommunication that micro computer can be discerned;

(3) micro computer that is integrated in the microcomputerized control box 1 is judged their flow value and current mixing ratio according to the correlation of " the flow---signal of telecommunication " of importing each flowmeter in advance;

(4) after the operator imported selected mixing ratio instruction, micro computer can compare two and mix ratio, and electric control valve is assigned the open and close instruction, makes currency approaching to command value;

(5) through one section process that compares numerical value repeatedly and adjust valve opening, actual mixture ratio is controlled in the certain limit of command request, finishes the purpose of automatic mixing;

The function of microcomputerized control box 1:

Signal conversion and control section all are integrated in the control box, and there are plurality of keys and digital display tube in the box surface, can be by interactive mode, and the adjustment that carry out necessity to required mixing ratio is to adapt to: different foam liquid is as 3% and 6% etc. requirement; The difference of different vehicle installation system; The variation of different flow water pump; The difference of different types water pump such as low-lift pump and mesolow pump etc.

Claims

1, the automatically controlled automatic bubble proportion mixer of a kind of fire fighting truck, comprise water pump (10), foam inlet pipe (14), pump water inlet (16) and drain pipe (12), it is characterized in that: also comprise microcomputerized control box (1) and the foam flowmeter (3) that is electrically connected respectively with described microcomputerized control box (1), water ga(u)ge (5), electrically-controlled valve (4).

2, according to the automatically controlled automatic bubble proportion mixer of claims 1 described a kind of fire fighting truck, it is characterized in that: described electrically-controlled valve (4) is installed in vacuum and produces on the pipe (13), and described vacuum produces on the pipe (13) venturi nozzle (7) is housed.

3, according to the automatically controlled automatic bubble proportion mixer of claims 1 described a kind of fire fighting truck, it is characterized in that: described foam inlet pipe (14) is provided with feed liquor valve (9), and described water pump (10) is provided with water pump drain pipe (12).

4, according to the automatically controlled automatic bubble proportion mixer of claims 3 described a kind of fire fighting trucks, it is characterized in that: two forks are arranged behind the described feed liquor valve (9), and one the tunnel is automatic control piper (17), and foam flowmeter (3), electrically-controlled valve (4) are housed on it; Another road is manual control piper (18), and hand control valve (8) is housed on it.

5, according to the automatically controlled automatic bubble proportion mixer of claims 1 described a kind of fire fighting truck, it is characterized in that: detergent line (19) is housed on the described water pump drain pipe (12), described detergent line (19) is provided with cleaning valve (2), after described detergent line (19) is located at described water ga(u)ge (5).

6, according to the automatically controlled automatic bubble proportion mixer of claims 1 described a kind of fire fighting truck, it is characterized in that: detergent line (19) is housed on the described water pump drain pipe (12), and it is preceding that described detergent line (19) is located at described water ga(u)ge (5).