SUBSTANCE: invention relates to igniter compositions for electrical igniters. According to the invention, the composition which contains lead chromate, potassium chromate and lead rhodanate, also contains a metal-ceramic powdered composition based on carbides of group IV-VII transition metals, cemented by an iron subgroup metal in amount of 6-25%.
EFFECT: inclusion of a modifying additive into the composition in amount of 1-10%, over 100%, enables to stabilise particle-size composition of the product, increase accuracy of operation of electrical igniters and increase igniting capacity.
The invention relates to the field igniter compositions for the igniter.
Known igniter composition consisting of a powder or granular barium azide Ba(N3)2[Patent 2233258, Russia, SW 35/00]. Improving the accuracy of actuation of the igniter based on the igniter composition is achieved due to the nature of the composition, namely the fact that barium azide VA(N3)2is an individual chemical compound. According to the applicant's variation response time products with the use of barium azide is 2.4 MS for nichrome bridge filament, which is approximately 2 times lower than the desired standard value to 4.0 MS (2,0-6,0) MS.
The disadvantages of this structure should be attributed to the low value of safe DC (0.2 a), which does not allow to apply the composition in the products, which increased requirements for safe current.
Known pyrotechnic composition "THE 7276-177-075134-2001. The heat-resistant product for the production of electric spark igniter", resulting in a joint coprecipitation of lead Rodenstock, lead hromovokislyj and potassium perchlorate in the following mass proportions:
|Lead chronologicly, %||3-7|
|Cal is th chlorotolyl, %||40-46|
|Lead radamisty, %||46-52|
The disadvantages of this structure are as follows:
- heterogeneity of particle size distribution soosazhdenie product;
- significant variation in response time due to the heterogeneity of particle size distribution soosazhdenie product.
The technical result is achieved by the fact that during coprecipitation of pyrotechnic composition THAT 7276-177-075134-2001 introduced cermet powder composition based on carbides of transition metals of IV-VII groups, cemented metal of the iron subgroup from 6 to 25%, in an amount of from 1 to 10% above 100% (hereinafter modifying agent).
The technical result of the invention, the igniter composition for igniter lead chronologicly, potassium chlorotolyl, lead radamisty, characterized in that it contains cermet powder composition based on carbides of transition metals of IV-VII groups, cemented metal of the iron subgroup from 6 to 25%, in an amount of from 1 to 10% above 100%.
The introduction of the modifying additives allows to stabilize the particle size of the product soosazhdenie, to increase the accuracy of operation and to increase the igniting ability of the igniter.
P the results of the testing and comparison of known and proposed composition are provided later.
As you know, the igniter compositions are required by the homogeneity of the distribution of components in volume. If the igniter compositions of mechanical mixture, the homogeneous distribution is achieved by thorough mixing of the components of high dispersion. If the components of the composition are formed during the synthesis process, it becomes possible to control the shape of the crystals in order to give them a more correct form. Benchmark the correct form of the crystals is of spherical form, in which the ratio of the two dimensions (height and length) h/D is equal to unity. Crystals of spherical shape have a minimum area of contact with other crystals, thereby reducing the possibility of friction between them. This, in turn, positively affects a uniform distribution of components in volume, reduces conquest, caking of the product on a vacuum funnel, and also improves the stability of the suspension of the product in the lacquer.
To characterize the shape of the crystals was measured linear dimensions of the crystals with an accuracy of up to 0.01 mm by means of a ruler of an optical microscope. The measurements were carried out in 9 crystals each deposition for each type of crystals (1 type - spherical shape, type 2 - needle form).
The influence of modifying additives on the particle size distribution is left is given in table 1.
|The igniter composition||The ratio h/D||Mass fraction of crystals after sieve No. 61 %|
|1 type crystals (spherical)||type 2 crystals (needle)|
|Offered with 1% modifying additives||of 0.77 and 0.68||0,35-0,30||94,62|
|We offer 10% modifying additives||0,81-0,73||0,34-0,29||93,10|
As follows from table 1, the proposed composition of the average value of the ratio h/D in type 1 crystals is(0,77+0,68+0,81+0,73)/4=0,75, as for the composition of THE 7276-177-075134-2001 this ratio is equal to 0.52 in.
Thus the introduction of modifying additives improves the shape of the crystals, and the rate of h/D increases 1.44 times or 44%.
Than the ranks of changes happen with needle-like crystals form, in which the ratio h/D (0.32, i.e. increases to 2.28 times, or 128%. Summing up we can say that the modifying additive significantly improves the shape of the crystals closer to correct.
The particle size distribution of the offered product has a high, more than 90%mass fraction fraction after sieve No. 61, which provides a uniform and stable distribution of the compounds in the lacquer.
Therefore, the proposed formulations are the best indicators of granulometric composition compared to the composition of THE 7276-177-075134-2001.
Parameter time delay electric igniter (EV) is very important, because the response time EV affect the overall response time of the detonator. The response time EV should be in the range (2-6) MS. The stability and accuracy of response EV will depend on the homogeneity of the igniter composition, and as was shown above, the uniformity of the proposed composition of the above due to the stabilization of particle size distribution. Evidence of this are the test data EV made on the basis of the compositions of THE 7276-177-075134-2001 and offer with nichrome bridge incandescent.
Accuracy assessment of the operation of EV were carried out by finding the arithmetic mean value x, the amplitude R and the standard deviation S. the test Results is given in table 2.
|Response accuracy EV|
|The igniter composition||The arithmetic mean value x, MS||The standard deviation S, MS||The scale R, MS|
|THE 7276-177-075134-2001||of 3.46||1,15||3,40|
|Offered with 1% modifying additives||3,09-3,82||of 0.21 to 0.39||0,65-1,13|
|We offer 10% modifying additives||2,98-3,52||0,34-0,72||0,98-2,40|
In accordance with the requirements of acceptable change limits response time EV are: the lower boundary of the tolerance is 2 MS, the upper bound is 6 MS. The nominal value of the response time - 4 MS. As shown by the data in table 2, the composition of THE 7276-177-075134-2001 has a large variation in response time (R=3,40 MS), and with an average value of 3.46 MS response time EV can be 6,86 MS, which exceeds the permissible value. Here again Prowse is by the influence of the inhomogeneity of the particle size distribution. If the composition on the basis of barium azide scale (in the case of nichrome bridge) is 2.4 MS, the composition of THE 7276-177-075134-2001 scale increases to 3.4 MS.
In the proposed composition of the magnitude of is (0,65-2,40) MS, which is at the level of individual chemical compounds as barium azide, and even surpasses it, not to mention the composition of THE 7276-177-075134-2001.
A good example of the superiority of the operational characteristics of the proposed structure (in the parameter "time delay") is the standard deviation S, which characterizes the dispersion time expires EV around the average value.
As can be seen from table 2, the standard deviation for the composition of THE 7276-177-075134-2001 is 1,15 MS, and the proposed composition of this value is significantly smaller and is only (0,21-0,72) MS.
The statistical evaluation time expires EV confirms the superiority of the proposed composition of the above composition THE 7276-177-075134-2001.
The most important characteristic of EV is initiating ability, which is characterized by igniting capacity, i.e. the ability to initiate the next element in the chain of initiation.
Igniting ability of the compounds was characterized by the probability of ignition of trinitroresorcinate lead (CNRS), pressed under a pressure of 500 is g/cm 2located at a distance of 30 cm from the EV. The beam of fire was spreading through the channel, causing an explosion or failure TNRS. The number of parallel tests 10. The results flammable abilities EV made on the basis of known and proposed formulations are shown in table 3.
|Igniting ability of the compositions|
|The igniter composition||The probability of ignition %|
|Offered with 1% modifying additives||70|
|We offer 10% modifying additives||90|
Thus, the proposed composition is more, compared with the composition of THE 7276-177-075134-2001, igniting capacity.
The igniter composition for igniter lead-containing chromic acid, potassium chloride acid, lead radamisty, characterized in that it contains cermet powder composition based on carbides of transition metals of IV-VII groups, cemented metal of the iron subgroup from 6 to 25%, in the amount of the t 1 to 10% above 100%.
SUBSTANCE: charge to excite seismic oscillations comprises a cartridge with an axial channel and a dead hole made at one of the ends, where an intermediate initiator (II) is located, as well as a fixing element (FE), which prevents II fallout from the cartridge. The FE is arranged in the form of a ring with the inner concave or straightened face at the upper end. The charge elements are made of an explosive, which contains the following components in certain ratios - a ballistic solid rocket propellant (BSRP) or a composition of BSRP and a ballistic artillery powder, and a brisant explosive, technological, retarding and hydrophobic additives. The method to make the charge includes operations of FE moulding or joint moulding of FE and II directly in the dead hole of the cartridge, as a result of which the charge elements form undetachable connections.
EFFECT: improved serviceability at low temperatures and long-term stay in flooded wells.
18 cl, 8 dwg, 1 tbl
SUBSTANCE: invention relates to an inflammable composition and uses thereof. The composition contains an explosive fraction which contains at least one primary explosive substance, a redox system and binder-plasticiser. The explosive fraction in the composition makes up 9-35 wt % of the composition. The primary explosive substance is tetrazene, which makes up 95 wt % of the said explosive fraction.
EFFECT: explosive fraction does not contain lead.
21 cl, 3 tbl, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of various-purpose pyrotechnical compositions. Proposed method comprises subjecting components of composition powder redoxides and mixes thereof to intensive percussive-abrasive mechanical effects to form sintered particles of initial components and/or increase deficiency of crystalline structure of reagents, namely, to broadening of individual X-ray diffractograms spots by, at least, 10% compared to initial values. Mechanical processing of composition components may be conducted both simultaneously and separately with subsequent mixing.
EFFECT: higher rate and stability of combustion, improved firing characteristics.
2 cl, 3 dwg, 1 tbl, 4 ex
SUBSTANCE: invention relates to pyrotechnic delay devices. According to the invention, the delay device (10) has a strip for setting the delay time (14) and a calibration strip (20) deposited on a substrate (12). The strip for setting the delay time and the calibration strip contain energy materials which can contain particles of nanosized materials, e.g. fuel and oxidant, deposited as separate layers. The method of making delay devices involves depositing on the substrate (12) a strip for setting the delay time (14), having a signal input point (14d) and a signal output point (14e), and depositing a calibration strip (20) on the said substrate or another substrate. The strip for setting the delay time (14) and the calibration strip (20) have identical compositions or are configured differently, e.g. by varying thickness of the strip in order to ensure the same burning speed. The calibration strip (20) is set on fire and its burning speed is recorded. The strip for setting the delay time (14) is adjusted using a control structure in order to attain the desired delay time, preferably based on that the burning speed of the strip for setting the delay time (14) largely coincides with the recorded burning speed of the calibration strip (20).
EFFECT: more accurate delay time.
45 cl, 34 dwg
SUBSTANCE: percussion cap of small arms (version 1) includes percussion-igniting composition containing diazodinitrophenol, monobasic potassium styphnate and inert sensibiliser; at that, ratio of weight of percussion-igniting composition to volume of percussion cap is 0.26…0.63 g/cm3. Percussion cap of small arms (version 2) includes percussion-igniting composition containing diazodinitrophenol, monobasic potassium styphnate, potassium salt of dinitrobenzofuroxane and inert sensibiliser; at that, ratio of weight of percussion-igniting composition to volume of percussion cap is 0.20…0.50 g/cm3.
EFFECT: increasing thermal stability of the cap and the possibility of providing stable ignition of propellant powder charges, stability of ballistic characteristics within wide temperature range from -50°C to +50°C.
2 cl, 4 tbl
FIELD: devices for measuring action time of means for initiation.
SUBSTANCE: two proposed variants of a device for determining actuation time of an initiatorless primer/ detonator fitted with an impact wave tube in a transparent envelope used to conduct the pulse from an initiating device. The device according to variant 1 comprises a chronograph, a chronograph start photosensor responding to the radiation of a detonation front which propagates inside the impact wave tube after initiation of the later, a chronograph stop sensor responding to the impact effect upon actuation of the primer/detonator. The device according to variant 2 comprises a photosensor being used as a chronograph stop sensor responding to the radiation upon actuation of the primer/detonator, disposed around the later and placed into a bushing with a not less than 5 mm wide and 3-10 mm long slot cut therein.
EFFECT: invention ensures reliable, safe and precise measurement of the actuation time of initiatorless primers/detonators in a multiple use device.
6 cl, 3 dwg
SUBSTANCE: explosive cartridge includes cylindrical shell, wherein an explosive charge is disposed with an end-to-end channel and detonator socket, their inlets being connected by a groove. The cartridge explosive composition comprises 20-30% of tetranitropentaerytrite (TEN), 65-50% of trinitrotoluene (TNT) with addition of 15-20% of granulotol. The bottom end of the cartridge is protected with a polymeric disc.
EFFECT: reducing the sensitivity of explosive agent and manufacturing costs of the cartridge on retention of its explosive and operational performance.
3 cl, 2 dwg
FIELD: production of blasting means, applicable in production of blocks used as intermediate detonators, as well as for geophysical operations.
SUBSTANCE: the cast trinitrotoluene block-detonator is made of trinitrotoluene granules containing gas inclusions, whose content makes up 10 to 44 percent by weight, the gaps between them are filled with cast trinitrotoluene, it is provided with a polymeric housing. to enhanced the reliability of operation at a content of granulated trinitrotoluene below 30 per cent, modifications of the block were developed. The cast trinitrotoluene block-detonator may be provided with a vertical insert with an opening for the detonator of cast mixture of trinitrotoluene and tetronitropentaerythritol of composition 50/50 percent by weight, or cast mixture of trinitrotoluene and hexogen of composition 60/40 percent by weight, or have a layer in the active part area of the detonator containing a cast mixture of trinitrotoluene and tetronitropentaerythritol of composition 50/50 percent by weight, or a cast mixture of trinitrotoluene and hexogen of composition 60/40 percent by weight. The cast trinitrotoluene block-detonators are receptive to standard means of initiation, posses a high water resistance, feature a simple and safe production practice, may be produced with a mass within 0.5 to 3 kg.
EFFECT: simple and technologically effective manufacture of the block having the required water resistance, reliability of operation and a high power.
17 cl, 3 tbl, 3 dwg
SUBSTANCE: invention relates to blasting cartridges and blasters for charges of low-sensitivity industrial explosives. According to first embodiment, blasting cartridge consists of polymeric case having longitudinal side grooves, annular furrows, and cover and incorporates two-layer explosive charge obtained from pulse-sensitive loose explosive, initiation means disposed in top part of polymeric case, and molded explosive capable to detonate from loose explosive and disposed in bottom part of polymeric case. According to second embodiment, blasting cartridge differs from the first one by that interface between two explosive layers is located below upper annular furrow when molded explosive is disposed in bottom part of polymeric case and above upper annular furrow when loose explosive is disposed in bottom part of polymeric case. Blasters in the two embodiments contain, as intermediate detonator, first- and second-embodiment blasting cartridges, respectively. Initiation means are inserted in longitudinal side grooves or in longitudinal side grooves and annular furrows of polymeric case in the lose explosive zone. Thin-walled polymeric cylinder is constructed with rounded edges in its bottom part protruding on bottom part of polymeric case. Diameter of hemisphere of protrusions of thin-walled polymeric cylinder is equal to half height of lower annular furrow of polymeric case and they are shifted by pairs to half height of lower annular furrow such that longitudinal grooves of thin-walled polymeric cylinder enter into longitudinal side grooves of polymeric case and press primary initiation means to polymeric case along all their length. Third-embodiment blaster contains second-embodiment blasting cartridge and polymeric case filled with molded explosive, wherein polymeric cases are arranged in bottom-to-bottom manner and inserted into thin-walled polymeric cylinder. Fourth-embodiment blaster consists of one or two second-embodiment blasting cartridges and two or three polymeric cases filled with molded explosive and disposed in the covered polymeric case. Initiation means are located in a similar manner as in the first-embodiment blaster.
EFFECT: increased blasting operations efficiency.
19 cl, 13 dwg, 4 tbl
FIELD: mining industry; other industries; production of the high-temperature electric detonators.
SUBSTANCE: the invention is pertaining to production of the high-temperature electric detonators. It presents the high-temperature electric detonator consisting of the tube, containing the cap charged with the blasting explosive and the electric spark igniter fixed in the tube by the method of compaction of its mouth. The electric igniter contains the igniting composition containing potassium perchlorate, potassium picrate, polyphenylsilane resin and polybutylmethacrylate resin. The invention has the purpose to ensure the reliable operation of the electrical detonator at the temperatures of 200-210°С.
EFFECT: the invention ensures the reliable operation of the electrical detonator at the temperatures of 200-210°С.
2 tbl, 1 dwg
SUBSTANCE: invention relates to small-scale heat-power engineering, particularly thermite fuel compositions which, during initiation, can undergo chemical conversion with release of a large amount of heat, and mainly to such compositions which do not detonate and in which redox reactions take place in air in combustion mode without a special oxidising agent and without formation of a liquid phase. Aluminium oxide and aluminium are added to the thermite fuel composition in form of nanopowder in the following ratio in wt %: aluminium oxide nanopowder 1.5-3.0; aluminium powder - the rest. During combustion of the disclosed thermite, a liquid phase does not form and there is no fusion with the substrate.
EFFECT: high heat-liberation value of the thermite fuel and low content of liquid phase in combustion products of this fuel.
1 tbl, 1 ex
SUBSTANCE: invention relates to pyrotechnics. The composition for preparing pyrotechnic elastic material contains 8-10 wt % barium chromate, 2-7 wt % potassium perchlorate, 2-7 wt % fluoroplastic F-42, 45-61 wt % titanium powder, 5-8 wt % asbestos and 16-30 wt % titanium dioxide.
EFFECT: preparation of a composition for making pyrotechnic elastic sheet material which can be used for maintaining the required temperature during a given time interval and has the following characteristics: rate of combustion - 20-30 mm/s, specific gas release - 9-31 cm3/g, specific heat dissipation - 470-580 cal/g.
1 tbl, 7 ex
SUBSTANCE: pyrotechnical moderating composition contains 80-93 wt % of lead chromate and 7-20 wt % of fluoroplastic 2M - polyvinyliden fluoride. Composition has rate of burning of 0.58-0.98 mm/s, is reliably ignited from ignition composition with heat release of 360 cal/g.
EFFECT: possibility to use composition for equipment of explosive automatics devices.
SUBSTANCE: pyrotechnical smoke-generating composition comprises hexachloroethane, zinc oxide, aluminium powder and fluorine rubber as technological additive.
EFFECT: improved masking property of smoke-generating composition.
SUBSTANCE: invention refers to the pyrotechnic fume-forming compounds. The pyrotechnic mixture for the smokescreen contains hexachlorbenzene, zinc oxide, phenol-formaldehyde resin and the powder of the aluminium-magnesium alloy as metallic fuel.
EFFECT: invention allows to enhance the fume-forming in the pyrotechnic compounds combustion and the obscurity power of the smoke-cloud.
SUBSTANCE: invention relates to pyrotechnics. Pyrotechnical composition for generating white color smoke while burning contains potassium perchlorate, hexachlor ethane, aluminium powder with specific surface 0.3-0.38 m2/g, zinc oxide or zinc white, technological additives - chlorinated polychloroprene rubber, plasticised with dibutyl sebacinate, and aerosyl.
EFFECT: increasing temperature and speed of composition burning, as well as covering ability of generated smoke.
SUBSTANCE: invention relates to pyrotechnics. Two variants of the pyrotechnics retarding composition are suggested. According to variant 1 the composition contains wolfram powder as fuel, oxide lead PbO2 or Pb3O4 or the mixture with barium chromate as an oxygen carrier and fluoroplastics as a binding agent in quantity from 0.2 to 2 w.% over the weight of the oxygen agent and fuel. According to variant 2 the composition contains powder mixture of wolfram and silicon as fuel, oxide lead PbO2 or Pb3O4 or their mixture as an oxygen carrier and fluoroplastics as a binding agent in quantity from 0.2 to 2 w.% over the weight of oxygen agent and fuel. The invention is aimed at dependence decrease of the compound burning speed and their stability during long-term storage in humid conditions.
EFFECT: dependence decrease of burning speed of the pyrotechnics compounds.
11 cl, 1 tbl, 7 ex
FIELD: blasting operations.
SUBSTANCE: invention relates to incendiary compositions that can be used in small arms cartridges of incendiary and combined effect to ignite liquid hydrocarbon fuel. The invention proposes an incendiary composition comprising an aluminum-magnesium alloy powder, graphite, oxidiser, i.e. an iron oxide, copper oxide, and nickel oxides and a low-molecular fluoroplastic as a binder. The composition represents spherical granules, 30 to 40% of which feature a diameter less than 250 micron, and 20 to 30% have a diameter of 800 to 1000 micron.
EFFECT: longer combustion of the composition and formation of greater amount of large-size condensed combustion products.
FIELD: pyrotechnic materials (options).
SUBSTANCE: according to first embodiment of the group of inventions, composition contains titanium, barium chromate, potassium perchlorate, asbestos, and fluoroplastic-42 powders and, according to second embodiment, zirconium, barium chromate, potassium perchlorate, asbestos, and fluoroplastic-42 powders. Material has following characteristics: combustion rate 1-4 m/s, specific gas release 30-50 cc/g, and specific heat generation 430-900 kcal/g.
EFFECT: increased reliability in fire impulse transfer.
2 cl, 1 tbl
FIELD: pyrotechnics; production of the pyrotechnic compositions for manufacture of the jet flying toys.
SUBSTANCE: the invention is pertaining to the field of pyrotechnics, in particular, to the pyrotechnic compositions for manufacture of the jet flying toys. The invention presents the spark-forcing pyrotechnic composition containing the potassium perchlorate, the potassium benzoate, the phenol-formaldehyde resin and the powder of aluminum, titanium, aluminum-magnesium alloy or their mixture as metallic fuel. The purpose of the invention is the increased energetics and the gas formation at combustion of the pyrotechnic composition.
EFFECT: the invention ensures the increased energetics and the gas formation at combustion of the spark-forcing pyrotechnic composition.
FIELD: alternate fuels.
SUBSTANCE: invention provides gas-free thermite fuel composition including powdered iron oxide-alumina mixture and additionally containing at least one element oxide selected from oxides of following elements: B, Si, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, rare-earth elements, Hf, Ta, W, Pn, Bi and reducing agent selected from one or more of following elements: Mg, Ca, Ba, C, all components being taken in specified proportions and sum of all oxides to sum of reducing agents, including aluminum, being equal to 2-3. Fuel is characterized by controlled heat release, temperature, and burning rate. Inflammation time of fuel is of order of tenth parts of second.
EFFECT: extended assortment of gas-free fuels and increased safety of heat-generating apparatuses.