Large oil immersed power transformer, reactor oil tank anti-explosion pressure releasing system
Affiliated technical field:
The present invention relates to a kind of large oil immersed power transformer, reactor oil tank anti-explosion pressure releasing system, belong to technical field of transformer manufacturing.
Background technology:
For oil-immersed type transformer, when transformer inside was short-circuited fault, high temperature or electric arc can cause the decomposition of transformer oil, produced a large amount of gas, and the pressure in the fuel tank is sharply raise.If the pressure with its generation does not discharge, fuel tank will be out of shape or break, and causes serious accident, and this just need protect with pressure relief valve.At present; the protection of high-power transformer fuel tank is the pressure relief valve that φ 130 oil spout bores respectively are installed at the case lid two ends; when break down in transformer inside; internal pressure raises; when the operating value of pressure overpressure relief valve, pressure relief valve is opened, and the oil extraction release; the protection fuel tank, the accident that prevents enlarges.But the protection of in fact this fuel tank is unsatisfactory, when the Accident of Transformer energy hour, transformer is stopped transport, and not action of pressure releaser made; When the Accident of Transformer energy was big, pressure releaser made also had little time action, fuel tank destroyed.This accident took place repeatedly to cause enormous economic loss.
By analysis, the reason that fuel tank destroys is 1, the accident point abrupt release goes out very big energy, makes the transformer oil exploded, gasification, and pressure increases severely, and is bigger tens times than service pressure, causes transformer oil to produce liquid the impact.2, as can be known by fluid mechanics, liquid is under the effect of surge, the influence of factors such as the gravity of the pressure conduction liquid body of liquid, inertia force, quality, density, viscosity, friction loss, its inside pressure of particle everywhere has nothing in common with each other, and variation along with time and distance, form the barometric gradient between accident point and pressure relief valve, also be attended by the impact endurance test shock ripple.3, accident point usually and the distance between the pressure relief valve far away.4, pressure relief valve be because the build-in attribute of performance of itself and oil can not be opened pressure release when accident takes place at once, when the local pressure of oil greater than fuel tank bear the limit time, fuel tank must be destroyed.
Summary of the invention:
The object of the invention provides a kind of large oil immersed power transformer, reactor oil tank anti-explosion pressure releasing system, safe and effective release pressure, can avoid because breaking of fuel tank caused fire for transformer, can avoid simultaneously because fuel tank breaks and causes the pollution of transformer oil to environment, guarantee the operation of transformer long-term safety, solve the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: large oil immersed power transformer, reactor oil tank anti-explosion pressure releasing system are included in the high-low pressure both sides and the fuel tank both ends of fuel tank and respectively arrange the pressure relief valve of some quantity respectively, quantity is decided on the length and the width size of fuel tank, for fuel tank strength weak place, the distance between the pressure releaser made suitably reduces.
The pressure relief valve that said fuel tank both ends are arranged lays respectively at 1/3 height and 3/4 height of fuel tank.
Adopt the present invention's setting pressure relief valve no longer on the oil tank of transformer case lid.
Large oil immersed power transformer, reactor oil tank anti-explosion pressure protective system specifically comprise inspection opening, collecting pipe, monitoring of leakage instrument, pneumostome, pressure releaser made, branch oil guide pipe; inspection opening, collecting pipe, pressure releaser made, branch oil guide pipe are arranged on the fuel tank; divide oil guide pipe one end to connect pressure releaser made; the other end connects collecting pipe, is provided with monitoring of leakage instrument and pneumostome on collecting pipe.
Collecting pipe is compared with a minute oil-piping layout, and diameter is thicker.
According to the analysis of oil tank of transformer accident damaged condition in recent years as can be known, the accident majority occurs in 1/4 scope of fuel tank top and in 1/3 scope of fuel tank bottom, and the damaged condition of fuel tank bottom is often serious than top.This is because pressure relief valve, connection pipe, oil conservator etc. are arranged at top, certain decompression protection ability is arranged, and the pressure release ability of bottom is just very poor.In order to guarantee that Accident of Transformer takes place can effectively release dangerous pressure moment; the safety of protection fuel tank; the accident that prevents enlarges; the routine that the present invention has changed pressure releaser made prevents method; promptly at fuel tank case lid two ends placement force relief valve; but take multiple spot to arrange that emphasis is set up defences, the pressure release ability during with the increase Accident of Transformer.
Beneficial effect of the present invention and the difference of comparing with background technology: traditional fuel tank protection system is when the transformer internal short circuit fault; if pressure relief valve can not in time move; the huge energy that moment produces during short circuit will be destroyed oil tank of transformer; cause transformer oil to leak, even breaking out of fire.Even if pressure relief valve in time moves, kept fuel tank avoid impaired, but also pollute the environment from the oil of pressure relief valve ejection at short notice, also may flame.And oil tank anti-explosion of the present invention system, when the transformer internal short circuit fault, a plurality of pressure relief valves move simultaneously, and the transformer oil that expands is rapidly imported in total collecting pipe by a plurality of minutes oil guide pipes; Both prevented that oil tank of transformer was impaired, simultaneously, collected the transformer oil of ejection again, and made environment avoid polluting.
Description of drawings:
Fig. 1 is an embodiment of the invention structural representation;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the end view of Fig. 1.
Among the figure: inspection opening 1, collecting pipe 2, monitoring of leakage instrument 3, pneumostome 4, pressure releaser made 5, branch oil guide pipe 6.
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
In an embodiment; large oil immersed power transformer, reactor oil tank anti-explosion pressure protective system comprise inspection opening 1, collecting pipe 2, monitoring of leakage instrument 3, pneumostome 4, pressure releaser made 5, divide oil guide pipe 6; inspection opening, collecting pipe, pressure releaser made, branch oil guide pipe are arranged on the fuel tank; divide oil guide pipe one end to connect pressure releaser made; the other end connects collecting pipe, is provided with monitoring of leakage instrument and pneumostome on collecting pipe.Collecting pipe is compared with a minute oil-piping layout, and diameter is thicker.The pressure relief valve of some quantity is respectively arranged at high-low pressure both sides and fuel tank both ends at fuel tank respectively, and quantity is decided on the length and the width size of fuel tank, and for fuel tank strength weak place, the distance between the pressure releaser made suitably reduces.The pressure relief valve that said fuel tank both ends are arranged is positioned at 1/3 height and 3/4 height of fuel tank.Adopt the present invention's setting pressure relief valve no longer on the oil tank of transformer case lid.
When the present invention breaks down in transformer inside; those near pressure relief valves 5 of distance fault point can be opened (less than 80ms) rapidly in the very short time; discharge the transformer oil that expands; reduce the pressure of oil, thereby the protection oil tank of transformer can not ftracture, when pressure releaser made is opened to fuel tank; send signal; transformer is left from system break, the excision source of trouble, the accident that prevents further takes place.The oil that each pressure releaser made is discharged is transported in the thick collecting pipe 2 of diameter by minute oil guide pipe 6 simultaneously, prevents the transformer oil contaminated environment, and collecting pipe is both as collecting the oily device that pressure relief valve is discharged, simultaneously to each minute collecting pipe mechanical support is provided.Because all pressure releaser mades are installed in branch collecting pipe inside,, be not easy to be found if seepage oil takes place.For the seepage oil of monitoring pressure release, at the monitoring of leakage of the installation bottom instrument 3 of total collecting pipe, if pressure releaser made generation seepage oil, oil will collect in the monitoring of leakage instrument, when oil mass is increased to certain volume, the monitoring of leakage instrument will send alarm signal, and the prompting user in time handles.Collecting pipe top is provided with pneumostome 4, during the pressure releaser made draining, can reduce the oil extraction resistance like this, can prevent that outside foreign material and toy from entering collecting pipe simultaneously.Inspection opening 1 can be used for observing and use when safeguarding.