CN2401211Y - Gas pipe explosion-resistant device with explosion wave attenuator - Google Patents

Abstract

The utility model relates to a safety device used in a gas pipe, which comprises a discoid fire-resistant core in the prior art, a small expandable pipe cavity axial line which is provided with the discoid fire-resistant core forms a vertical structure with the gas pipe, and a coaxial double-sleeve pipe type explosion wave attenuator is arranged between the inlet end of a small expandable pipe cavity and the gas pipe; the utility model is composed of an inner sleeve pipe, an outer sleeve pipe, and a large expandable pipe cavity, wherein, the inner and the outer sleeve pipes are coaxial and are contained in the large expandable pipe cavity; the inner and the outer sleeve pipes form a coaxial line structure with the small expandable pipe cavity, and ventholes which are positioned in a staggered form are arranged on the inner and the outer sleeve pipes. The explosion wave with a high-speed and high-strength movement can be weakened progressively by the utility model, and therefore, the explosion wave can be quenched successfully in the fire-resistant core at last, and the safety of the gas pipe can be ensured.

Description

Gas pipeline detonation seal with detonation wave attenuating device

The utility model relates to the safety means that use in the gas pipeline.

Producing or transporting in the grid of fuel gas, safety in order to ensure some substantial equipment, need spark arrester be installed at the suitable position of pipeline, its effect is to stop under non-normal condition detonation or detonation flame along pipe transmmision, and make flame generation extinguishing, thereby prevent the gas explosion accident.Flame arrester for pipe and the difference of detonation seal be its can extinguishing flame speed different, spark arrester requires the detonation flame of energy extinguishing with the subsonic speed motion, detonation seal then requires the detonation flame of energy extinguishing with the supersonic speed motion, and can bear the immense pressure that detonation wave produces.The detonation flame speed is big more, means that also detonation wave corrugated pressure is big more, and is also high more to the requirement of detonation seal.

The spark arrester of producing in the prior art and using is " through type " corrugated plating spark arrester, its air inlet, gas outlet are coaxial with fire-retardant core, fire-retardant core is to roll into plate-like jointly with thin stainless steel ripple band and flat rubber belting, and its back-fire relief ability only depends on the size and the flame retardant bed thickness in the hole, triangular-section that is formed by ripple on the disc type fire-retardant core.For preventing to produce excessive fuel gas flow resistance, the thickness of above-mentioned triangle aperture and flame retardant bed must limit within the specific limits in actual applications, and this has also just correspondingly limited the extinguishing ability of spark arrester.So spark arrester of the prior art still can not stop, the detonation flame of extinguishing high-speed motion, and the safety of gas pipeline still can not be guaranteed.

The purpose of this utility model is, at the deficiencies in the prior art, provides a kind of and can stop the also gas pipeline detonation seal of extinguishing high-speed motion detonation flame.

The purpose of this utility model realizes in the following manner.

Gas pipeline detonation seal of the present utility model, it comprises and is arranged on the plate-like fire-retardant core that is rolled into by corrugated ribbon peace tape alternation in the little expansion tube chamber, it is characterized in that, the axis and the gas pipeline of the described little expansion tube chamber that is equipped with the plate-like fire-retardant core are perpendicular, between little expansion tube chamber flame arrival end and gas pipeline, also be provided with one coaxial pair bushing type detonation wave attenuating device, this device is by in coaxial, outer tube and the big expansion tube chamber that contains the two constitute, in, outer tube and little expansion tube chamber coaxial line, the diameter of inner sleeve is more than or equal to the diameter of gas pipeline, blow vent on the outer tube is located at the back side that detonation wave comes flow path direction, can be provided with plural blow vent on the inner sleeve, each blow vent all with outer tube on be staggeredly located out, in, blow vent area on the outer tube is respectively more than or equal to the sectional area of gas pipeline; Meet on the wall of detonation wave in the outer tube front and can be provided with latticed absorption plant.

Gas pipeline detonation seal of the present utility model, when detonation wave forms in pipeline and when detonation seal advances, at first be attenuated in big expansion tube chamber, next is installed in the latticed absorption plant that outer tube meets on the corrugated will bring into play its absorption function, and this makes detonation wave be able to further decay.After this, flow into the passage at the outer tube back side along the outer tube outer ring, enter inner ring road through the detonation wave of decay, i.e. interlayer between internal and external casing, a plurality of passages on inner sleeve enter in the little expansion tube chamber then.Detonation wave detouring and entering another on loop expanded tube chamber, just enters fire-retardant core after being attenuated again.The detonation wave intensity of this moment greatly weakens, and the speed of its flame front is also corresponding to be reduced, and then it is easier to by the fire-retardant core extinguishing.Compared to existing technology, gas pipeline detonation seal of the present utility model can make at a high speed, the detonation wave of high-intensity exercise is attenuated step by step so that at last in fire-retardant core by successful extinguishing, guarantee the safety of gas pipeline.It can be widely used in the pipelines such as oil, chemical industry, natural gas, coal gas, metallurgy.

Be further described below by embodiment and accompanying drawing thereof.

Fig. 1 is the overall structure schematic diagram of a kind of embodiment of the utility model, has used full section among the figure.

Fig. 2 is the vertical view of Fig. 1, has used A-A partly to cut open among the figure.

Among Fig. 1, (1) is the housing that an inner chamber has curved passage, and its two ends, left and right sides are provided with the coaxial line flange dish that is connected usefulness with gas pipeline, and lid (2) is arranged at its top, and it is fixedly connected on the housing (1) by threaded connector (3) and seal.Extended from the passage that right ring flange endoporus enters cavity at stepped hole, constitute big expansion tube chamber.Inner surface at lid (2) is provided with inside and outside two same core sleeve, the diameter of inner sleeve (4) equals the internal diameter of left and right sides ring flange, the lower end of inner sleeve is tapered to be amplified to a bigger stepped hole, and its external diameter cooperates with the internal diameter in housing down going channel hole, promptly constitutes little expansion tube chamber.The lower end of outer tube (5) and the conical section of inner sleeve lower end join, thereby integral cavity is divided into three not connected parts, promptly big expansion tube chamber, interior ring cavity and little expansion tube chamber, and the three is only linked up by the passage that is located on the inside and outside sleeve pipe.(7) for being located at the interior passage on the inner sleeve wall.(9) for being located at the outer vent on the overcoat tube wall.Blow vent area on the inside and outside sleeve pipe is respectively more than or equal to the sectional area of gas pipeline.(6) for being connected in the latticed absorption plant on the outer tube periphery, it faces the inlet of right ring flange.(8) be level Four formula fire-retardant core of the prior art and supporting mechanism thereof.

Referring to Fig. 2, the situation after this figure has given full expression to and analysed and observe along two ring flange axis horizontal.(10) be big expansion tube chamber, (11) are interior ring cavity, and (12) are the inner sleeve inner chamber.Latticed absorption plant (8) is close on the outer surface of outer tube, and its width accounts for 1/3 of outer tube circumference.Can be found out that by figure outer tube (5) is provided with a big passage, it is positioned at the outer casing tube body left side.Inner sleeve is provided with three less passages, lays respectively on the forward and backward and right side wall of inner sleeve body.Following half outline drawing is expressed between lid and housing and has been used 12 uniform threaded connectors to be connected among the figure.

In the present embodiment, when the detonation wave of high-speed motion when right ring flange endoporus enters cavity, volume expands rapidly in big expansion tube chamber (10), and the latticed absorption plant (8) that meanwhile heads on is given full play to absorption function, makes its intensity and speed obtain attenuation of the first kind.After this, detonation wave through decay is advanced into passage on the outer tube left side wall along the outer tube outer ring, ring cavity (11) in arriving, then 3 little passages on inner sleeve enter in the inner sleeve inner chamber (12) continue descending, and enter in another less expansion tube chamber, enter the level Four fire-retardant core after being attenuated again.Because the detonation wave intensity of this moment greatly weakens, the speed of its flame front is also corresponding to be reduced, and then it is easier to by the fire-retardant core extinguishing.

Claims (2)

1. gas pipeline detonation seal with detonation wave attenuating device, it comprises and is arranged on the plate-like fire-retardant core that is alternately rolled into by corrugated ribbon and planar band in the little expansion tube chamber, it is characterized in that, the axis and the gas pipeline of the described little expansion tube chamber that is equipped with the plate-like fire-retardant core are perpendicular, between little expansion tube chamber flame arrival end and gas pipeline, also be provided with one coaxial pair bushing type detonation wave attenuating device, this device is by in coaxial, outer tube and the big expansion tube chamber that contains the two constitute, in, outer tube and little expansion tube chamber coaxial line, big expansion tube chamber and gas pipeline coaxial line, the diameter of inner sleeve is more than or equal to the diameter of gas pipeline, blow vent on the outer tube is located at the back side that detonation wave comes flow path direction, can be provided with plural blow vent on the inner sleeve, each blow vent all with outer tube on be staggeredly located out, in, blow vent area on the outer tube is respectively more than or equal to the sectional area of gas pipeline.

2. the gas pipeline detonation seal with detonation wave attenuating device as claimed in claim 1 is characterized in that, meets on the wall of detonation wave in the outer tube front and can be provided with latticed absorption plant.