阅读说明：本技术 油浸式变压器泡沫喷雾系统的两级混合式泡沫比例混合系统 (The hybrid foam proportioning system of two-stage of oil-immersed transformer foam spray system ) 是由 陈刚 王铭民 姚效刚 郭鹏宇 马青山 钱磊 侍成 王庭华 郑金平 王智睿 薛伟强 于 2019-08-16 设计创作，主要内容包括：本发明公开了一种油浸式变压器泡沫喷雾系统的两级混合式泡沫比例混合系统,包括泡沫混合器、泡沫液箱、消防水箱和消防泵,所述消防水箱的出水口通过第一管路与消防泵的进液口连通,消防泵的出液口同时连通第二管路和第三管路,其中第二管路用于连通系统主网,第三管路连通泡沫混合器的进液口,泡沫混合器的吸料口通过第四管路与泡沫液箱连通,泡沫混合器的出料口与第一管路连通；第二管路内的液体压力高于第三管路内的液体压力。本法发明能够降低因混合器造成的过大压力损失,能够提高系统混合比的稳定性,能够使管道中的泡沫原液与水充分混合。(The invention discloses a kind of hybrid foam proportioning systems of two-stage of oil-immersed transformer foam spray system, including foam mixer, foam liquid case, fire water box and fire pump, the water outlet of the fire water box is connected to by the first pipeline with the inlet of fire pump, the liquid outlet of fire pump is connected to the second pipeline and third pipeline simultaneously, wherein the second pipeline is used for connected system major network, the inlet of third pipeline connection foam mixer, the material sucking port of foam mixer is connected to by the 4th pipeline with foam liquid case, the discharge port of foam mixer and the first pipeline connection；Fluid pressure in second pipeline is higher than the fluid pressure in third pipeline.Excessive pressure loses caused by this law invention can reduce because of mixer, can be improved the stability of system mixing ratio, foam dope and water in pipeline can be made to be sufficiently mixed.)

1. a kind of hybrid foam proportioning system of two-stage of oil-immersed transformer foam spray system, it is characterised in that: packet Foam mixer, foam liquid case, fire water box and fire pump are included, the water outlet of the fire water box passes through the first pipeline and fire-fighting The inlet of pump is connected to, and the liquid outlet of fire pump is connected to the second pipeline and third pipeline simultaneously, wherein the second pipeline is for being connected to The material sucking port of system major network, the inlet of third pipeline connection foam mixer, foam mixer passes through the 4th pipeline and foam Liquid case connection, the discharge port of foam mixer and the first pipeline connection；Fluid pressure in second pipeline is higher than in third pipeline Fluid pressure.

2. the hybrid froth ratio mixed stocker of the two-stage of oil-immersed transformer foam spray system according to claim 1 System, it is characterised in that: it is provided with check-valves and filter on first pipeline, is provided with isolating valve on third pipeline, the 4th Check-valves is provided on pipeline.

3. the hybrid froth ratio mixed stocker of the two-stage of oil-immersed transformer foam spray system according to claim 2 System, it is characterised in that: the pipeline connection between the discharge port of the foam mixer and the first pipeline upper check valve and filter, And filter is between check-valves and fire pump.

4. the hybrid froth ratio mixed stocker of the two-stage of oil-immersed transformer foam spray system according to claim 1 System, it is characterised in that: the foam mixer includes level-one mixing chamber, level-one mixing chamber by bypass and foam mixer into The connection of liquid mouth, level-one mixing chamber are connected to the discharge port of the material sucking port of foam mixer and foam mixer simultaneously.

5. the hybrid froth ratio mixed stocker of the two-stage of oil-immersed transformer foam spray system according to claim 1 System, it is characterised in that: the flow-rate ratio by adjusting the second pipeline and third pipeline adjusts the hybrid froth ratio of the two-stage and mixes The system mixing ratio of system.

Technical field

The present invention relates to a kind of hybrid foam proportioning systems of two-stage of oil-immersed transformer foam spray system, belong to In public safety-fire prevention.

Background technique

In the less economic occasion in opposite water-deficient area or construction fire cistern and pump house, for oil-immersed transformer foam There are mainly two types of the presentation modes of the foam mixing liquid of spraying system: premixed type and live mixed type, due to live mixed type Scalability is higher than premixed type, therefore live mixed type will be commonly used.

The foam mixing liquid of live mixed type is generally prepared using in-line foam concentrate inducer, and this preparation method has Following problem: (1) in-line foam concentrate inducer is in order to work normally, it is necessary to the conversion of potential energy and kinetic energy is sufficiently carried out, and The conversion of this energy will cause the very big pressure loss (generally larger than 35%), thus can reduce the load energy of fire pump Power；(2) a little variation of system pipe network or end spraying equipment will lead to the variation of mixer back pressure, and the variation of back pressure again can be right The vacuum degree of mixer foam suction inlet has a significant impact, and foam dope is in the common of atmospheric pressure and vacuum condition herein Effect is lower, and into mixer, atmospheric pressure can be set as constant, and then the variation of vacuum degree will directly determine the sucking of foam dope Amount, that is, directly affect system mixing ratio, and system mixing ratio is an important factor in order of foaming system correlated performance；(3) In order to reduce losing along stroke pressure for system pipe network, the flow velocity of fluid is generally all little in pipeline, foam dope of the water to injection Agitation it is insufficient, keep mixing between the two less abundant, the bubble that the mixed liquor of undercompounding is unfavorable for frostproof froth n and is formed Foam is also unstable etc., and finally impacts to system extinguishing property.

Summary of the invention

Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of oil-immersed transformer foam The hybrid foam proportioning system of the two-stage of spraying system, excessive pressure loses caused by can reduce because of mixer, can The stability of raising system mixing ratio can be such that foam dope and water in pipeline is sufficiently mixed.

Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:

A kind of hybrid foam proportioning system of two-stage of oil-immersed transformer foam spray system, including foams mix Device, foam liquid case, fire water box and fire pump, the water outlet of the fire water box pass through the inlet of the first pipeline and fire pump The liquid outlet of connection, fire pump is connected to the second pipeline and third pipeline simultaneously, wherein the second pipeline is used for connected system major network, the The material sucking port of the inlet of three pipeline connection foam mixers, foam mixer is connected to by the 4th pipeline with foam liquid case, is steeped The discharge port of foam mixer and the first pipeline connection；Fluid pressure in second pipeline is higher than the fluid pressure in third pipeline.

In the present solution, the liquid of fire pump output is divided into two-way of different sizes in certain flow ratio, flow it is big one Road directly moves ahead along system major network, the small inlet for being back to fire pump again by the bypass of foam mixer all the way of flow； It is understood that the water outlet pressure of fire pump is centainly above water inlet pressure, then pressure (the second pipeline of third pipeline It is identical with third loine pressure) it is necessarily higher than the pressure of the first pipeline, namely may know that the inlet pressure of foam mixer is Higher than foam mixer discharge port pressure, liquid can be bypassed by foam mixer and is punched into the first pipeline, in this mistake Cheng Zhong, (its interior pressure is different according to the design of the structure of bubble chamber, and general use is not closed with the foam liquid case of bypass Structure, interior pressure is positive normal atmospheric pressure, necessarily less than the pressure of third pipeline) in foam dope will be inhaled into Into foam mixer, the liquid in foam dope and bypass is mixed to form level-one foam mixing liquid, and mixing ratio at this time is long-range In desired system mixing ratio, level-one foam mixing liquid can be again introduced into fire pump, sufficiently mixed by the vigorous agitation of fire pump Conjunction forms second level foam mixing liquid (being conducive to the stabilization of foaming and frothing foam, be conducive to the raising of fire extinguishing effectiveness), at this time Mixing ratio is to meet the requirement of system mixing ratio, and hereafter the system major network in fire pump downstream will convey always this second level foam and mix Liquid is closed to protection zone and then implements foam fire-fighting.

This programme creates point and is to set by the foam mixer for causing larger voltage loss, and it is bright to be only that fraction water flow has Aobvious crushing, and the overall crushing of system has significant reduction.The operating condition of foam mixer is not substantially by system pipe network and system The influence of end spraying equipment influences very little, and back pressure is constant, and the mixing ratio (i.e. level-one mixing ratio) of foam mixer is therefore And it is constant.When a little variation has occurred in the working flow of system or operating back pressure, system mixing ratio (i.e. second level mixing ratio) is still It will keep relative constant.This programme efficiently uses the agitaion of fire-fighting impeller of pump also to guarantee that water is mixed with the uniform of foam.

During our test of many times, for example certain adjustment is done to system pipeline strike length, has been increased for system One or several spray heads are added, the amount of system mixing ratio (the i.e. second level mixing ratio) variation finally determined is generally not more than 10%.For example system mixing ratio requires to be 3%, the system mixing ratio range of permission is 3%-3.9%, and real system is mixed when initial Composition and division in a proportion is 3.5%: when flow system flow increases 10%, system mixing ratio becomes 3.3%；When flow system flow reduces 10%, System mixing ratio becomes 3.9%.

Preferably, it is provided with check-valves and filter on first pipeline, prevents liquid from flowing backward to by check-valves and disappears In caisson, the damage of fire pump is reduced by filter.It is provided with isolating valve on third pipeline, can control by isolating valve The on-off of foam mixer bypass: when isolating valve is closed, foam mixer bypass shutdown, foam liquid case is no longer provided to system Foam dope, system are merely able to provide water source；When isolating valve is opened, foam mixer bypass is opened, and foam liquid case is to system Foam dope is provided, system provides the foam mixing liquid that system mixing ratio requires.It is provided with check-valves on 4th pipeline, by only Returning valve prevents the liquid in foam dope or foam mixer from flowing backward in foam liquid case.

Preferably, the pipeline between the discharge port of the foam mixer and the first pipeline upper check valve and filter connects It is logical, and filter is between check-valves and fire pump；All liquid into fire pump are allowed all by filtering, to allow any liquid It will not all flow back in fire water box.

Preferably, the foam mixer includes level-one mixing chamber, and level-one mixing chamber passes through bypass and foam mixer Inlet connection, level-one mixing chamber are connected to the discharge port of the material sucking port of foam mixer and foam mixer simultaneously.

It is mixed specifically, adjusting the hybrid froth ratio of the two-stage by the flow-rate ratio for adjusting the second pipeline and third pipeline The system mixing ratio of system.This system in normal work, the pressure difference at fire pump both ends be it is stable, variation can be ignored； Therefore, the flow-rate ratio of the second pipeline and third pipeline is bigger, and the soakage of foam dope is bigger, and system mixing ratio is higher, By learning methods such as neural networks, the corresponding relationship between flow-rate ratio and system mixing ratio may learn.

The utility model has the advantages that the hybrid froth ratio mixing of the two-stage of oil-immersed transformer foam spray system provided by the invention Device, the opposite and prior art, excessive pressure loses caused by having the advantage that 1, can reduce because of mixer, so that fire extinguishing System conveying distance is longer；2, can be improved the stability of system mixing ratio, ensure that indirectly system continuous service time this One design objective；3, foam dope and water in pipeline can be made to be sufficiently mixed, form uniformly mixed foam mixing liquid, favorably In the stabilization of foaming and frothing foam, be conducive to the raising of fire extinguishing effectiveness.

Detailed description of the invention

Fig. 1 is the structural diagram of the present invention；

It include: the first pipeline of 1- in figure；The second pipeline of 2-；3- third pipeline；The 4th pipeline of 4-.

Specific embodiment

The present invention will be further explained with reference to the accompanying drawing.

It is as shown in Figure 1 a kind of hybrid foam proportioner of two-stage of oil-immersed transformer foam spray system, packet Foam mixer, foam liquid case, fire water box and fire pump are included, the water outlet of the fire water box passes through the first pipeline 1 and disappears The inlet of anti-pump is connected to, and the liquid outlet of fire pump is connected to the second pipeline 2 and third pipeline 3 simultaneously, wherein the second pipeline 2 is used for Connected system major network, third pipeline 3 are connected to the inlet of foam mixer, and the material sucking port of foam mixer passes through the 4th pipeline 4 It is connected to foam liquid case, the discharge port of foam mixer is connected to the first pipeline 1；Fluid pressure in second pipeline 2 is higher than the Fluid pressure in three pipelines 3.

It is provided with check-valves and filter on first pipeline 1, isolating valve, the 4th pipeline 4 are provided on third pipeline 3 On be provided with check-valves；Pipeline between the discharge port of the foam mixer and 1 upper check valve of the first pipeline and filter connects It is logical, and filter is between check-valves and fire pump.

The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.