CN100460096C - Primacord rolling method and primacord rolling machine - Google Patents

Abstract

The invention relates to a primacord rolling method and primacord rolling machine, characterized in that passivation explosive material of 90-98% Hexogen(RDX) and 10-2% bonding agent are agglutinating and mixing evenly, and is cased into a one-end sealed soft blank pipe, to form granular structure with stacking density of 0.6-1.0 g/cm3. Then blank pipe opening is sealed, and the pipe is put into a cannelure matched with the desired pipe rolling diameter between a pair of roller flanges of the primacord rolling machine. The blank pipe is continuously passing multiple roller pairs of which the diameter is gradually decreased, and the decrease ratio of the diameter of blank pipe is less than 50%, until achieve the design requirement of the primacord product diameter. The length of primacord rolled by this method and equipment can be more than 200 metres. High safety can be assured during production process without any environmental pollution. Product quality is stable, and the wire loading density can be flexibly adjusted to meet the desire of different usages, good market competition advantage is provided.

Description

A kind of primacord rolling method

Technical field:

The invention belongs to the primacord production technical field, particularly rolling is produced the method and the primacord milling train thereof of primacord.

Background technology:

Publishing house's " mining initiating device " (published in 1978 according to Chinese coal industry, the 371-378 page or leaf) introduces, the common primacord of always using till today, its traditional processing technology is: pass through special equipment winding up explosive with cotton yarn or chemical fibre earlier, reusable heat bituminous coating, brown paper are wrapped up in envelope or thermoplastic materials coating to constitute watertight composition.This technology unit production capacity is low, and noise is big, the production cost height, and fibre dust and explosive dust are big; Because use a large amount of cotton yarns and chemical fibre multilayer winding up, medicine core explosive density is little, lack of homogeneity, the quality and the explosion velocity of primacord are wayward, and heated bitumen is poisonous.

Common primacord is owing to the linear charging density height, and explosion energy is excessive, and layer structure is loose, and sealing is poor, does not satisfy the requirement of dual-use technology.Domestic and international in recent years brainstrust is devoted to the research of low energy fuse.Introduce according to China's " explosive " magazine (1999 the 28th volume the 5th phase 17-18 pages or leaves), up-to-date technology path is the extension rope manufacturing process of using for reference in the millisecond delay cap at present: high explosive is put in the soft metal pipe, on the wire drawing bed of special use,, finally reach the purpose of thin footpath primacord through tens road drawing process.Such primacord side direction metal restraining force is strong, medicine core density height, and powder charge is even, and linear charging density is low, and blast output energy is low, and explosion velocity is stable, and quality is guaranteed, is promoted the use of in military technology.But wire drawing bed drawing tens road technologies are single handwork, and workload is big, poor stability, and production efficiency is low, and the cost height can't satisfy the needs of engineering.The length of primacord is that the length by the wire drawing bed is determined, can only produce the long thin footpath primacord of 10-20m at present, if continue to increase the length of wire drawing bed, primacord is easily broken, and more than the industrial detonating fuse length requirement 200m.

Existing conventional mill is commonly used to rolled plate, and resistance is big when rolling, can generate a large amount of heat, can not directly be used for the extrusion rolling primacord, otherwise may blast, and safety problem occurs.

So far do not see the relevant report that adopts the extrusion rolling method to produce primacord.

Summary of the invention:

The present invention proposes a kind of primacord rolling method, to solve the problems referred to above that prior art exists.

Primacord rolling method of the present invention, it is characterized in that: by mass ratio that the desensitized explosive of hexogen (RDX) 90-98% and adhesive 10-2% batching is fully bonding, mix, in the soft blank pipe of the end of packing into sealing, forming stacking density is 0.6-1.0g/cm ³Granular texture, after powder charge finishes the blank tube opening is sealed; The blank pipe that then this is installed desensitized explosive puts into that a pair roller wheel of primacord milling train is intermarginal need to push the groove that diameter is complementary with the blank pipe, right by many group trench diameter roll from large to small continuously, the temperature that controls environment is at 20-40 ℃, rolling speed per minute is no more than 50m, make the diameter reduction rate from large to small of blank pipe be no more than 50%, to the primacord product diameter that reaches designing requirement at every turn.

Described soft blank pipe can be selected the metal tube that comprises lead pipe, aluminum pipe, tin-tube, copper pipe, terne metal pipe, hard lead pipe or lead-antimony alloy pipe for use, or comprises the non-metallic pipe of vinyl tube, pvc tube, polytetrafluoroethylplastic plastic pipe, phenolic resins pipe or epoxy resin pipe.

Described rolling speed per minute is no more than 50m, makes the diameter reduction rate from large to small of blank pipe be no more than 50% at every turn, can adopt the mode of rotating speeds such as equal diameter roll variable speed or change diameter roll to realize.

The primacord milling train that primacord rolling method of the present invention is adopted comprises that control box, motor, transmission device and roll constitute, and roll is fixed on the bearing, another roll rotation that motor drives roll, matches mutually through gear driven by belt; The control box that is provided with " advancing ", " point advances ", " moving back ", " point moves back " and " stopping " button is connected with motor with power supply respectively; Roll is provided with safty shield; Employing is no less than 2 groups of arranged in series, every group and comprises two relative rolls, and it takes turns intermarginal being provided with the blank pipe need push the groove that diameter is complementary, and its reduction rate of taking turns intermarginal sulcus groove diameter of two adjacent groups roll is no more than 50%.

Can be respectively equipped with the multiple tracks cross section between described every breaker roll and be circular groove.

Compare with the drawing process of existing primacord, primacord rolling method of the present invention is owing to adopt the method for many group roll series connection extrusion rollings, streamline production, efficient height; Overcome with drawing process and produced in the primacord process shortcoming that primacord is easily broken; Broken through the limitation that primacord length is subjected to wire drawing bed length restriction.

In order to adapt to the security requirement of extrusion rolling primacord, primacord rolling method of the present invention is selected for use by the desensitized explosive of quality than hexogen (RDX) 90-98% and adhesive 10-2% batching; Comprehensive mobile and two factors considerations of steady detonation, the stacking density that requires the desensitized explosive granular texture is 0.6-1.0g/cm ³Be advisable.

Compare with existing steel plate rolling machine, primacord milling train of the present invention need push the moulding groove that diameter is complementary owing to take roll shop building to be provided with the blank pipe, it is rolling that its reduction rate of taking turns intermarginal sulcus groove diameter of two adjacent groups roll is no more than 50% series connection, make the diameter reduction rate from large to small of desensitized explosive blank pipe be no more than 50% at every turn, realized that lower resistance is rolling, the product temperature rise is slow, and the temperature rise amplitude is less; Because the present invention is controlled at 20-40 ℃ with the environment temperature of rolling blank pipe, the temperature of primacord in the operation of rolling can be controlled at 25-150 ℃, is lower than the heat decomposition temperature of medicine core explosive, thereby guarantee the safety and the product quality of production; And if environment temperature is lower than 20 ℃, the then easy embrittlement of blank pipe, easily cracked when rolling.

Since the blank pipe be in forming tank, be squeezed the effect and diameter reduction does not have the pulling force effect, can not produce the accident of breaking.Product primacord degree of packing is even, and detonation is stable.

The primacord length that adopts the inventive method to roll out can be greater than 200m, and diameter and linear charging density are adjustable, can satisfy dual-use requirement in a large number, and product has good market competition advantage.

Description of drawings:

Fig. 1 adopts the primacord mill milling primacord schematic diagram that becomes the diameter roll for the present invention;

Fig. 2, Fig. 3 are respectively A-A, the B-B generalized section of Fig. 1.

Fig. 4 adopts the primacord mill milling primacord schematic diagram of equal diameter roll for the present invention;

Fig. 5, Fig. 6 are respectively the A-A of Fig. 4, the B-B generalized section.

In the present embodiment, adopt the lead pipe of internal diameter 16mm, external diameter 20mm to do the powder charge blank pipe of desensitized explosive.

Determining of the quality proportioning of desensitized explosive and density: mobile poor because hexogen viscosity is big, change its physical state so will add adhesive, strengthen mobile so that operation processing also will guarantee steady detonation simultaneously.Through a large amount of experiments, choosing mass ratio is hexogen (RDX) 90-98%, and the proportioning of adhesive 10-2% is advisable, fully bonding in bowl, mix, this desensitized explosive for preparing is downward by openend, according to the volume of blank pipe with stack density at 0.6-1.0g/cm ³Requirement in the scope, the weighing desensitized explosive in the blank pipe of quantitatively packing into, keeps degree of packing even, according to the quality proportioning of front, makes the granular texture that obtains stack density at 0.6-1.0g/cm ³In the scope.

The concrete steps of present embodiment are as follows:

Make up a prescription: getting mass ratio is hexogen (RDX) 95%, adhesive 5%;

Powder charge: with the sealing of cotton yarn or other material, an end opening by openend quantitative dress desensitized explosive downwards, keeps that powder charge is even up and down with soft lead pipe one end of blank, and density is 0.8g/cm ³, the powder charge after-opening section that finishes is also sealed;

Rolling: the blank pipe that will install desensitized explosive puts into that a pair roller wheel of primacord milling train is intermarginal need to push the groove that diameter is complementary with the blank pipe; If taking between every breaker roll each roll to be respectively equipped with cross section, n road up and down relatively is semicircular groove, the 1-n root then can once feed intake.

What the motor of primacord rolling machine adopted in the present embodiment is that the model that Anhui Wannan Electric Machine Co., Ltd. produces is the threephase asynchronous of YZ-132S-4, power 5.5kw, operating voltage 380v.Send instruction by control box and drive equipment operation: adjust the charging attitude by " point advances "; make equipment serialization operation by " advancing " then; kine bias groove, derailed abnormal conditions take place in process; can use " point moves back ", " moving back " to readjust attitude, process finishes to make equipment downtime by " stopping ".

Fig. 1 has provided the primacord mill milling primacord schematic diagram of taking to become the diameter roll; Fig. 2, Fig. 3 are respectively A-A, the B-B generalized section of Fig. 1.

Further specify change diameter roll roll mill operation principle below in conjunction with Fig. 1, Fig. 2 and Fig. 3:

Becoming diameter roll equipment is that a series of roll is installed on the platform that works online by certain change diameter rule, and the rotational angular velocity of every breaker roll is constant, and roller diameter from left to right changes from small to big; Be carved with n semi-circular section forming tank (n 〉=1) on every breaker roll, roll forming tank diameter from large to small from left to right.Far Left roller groove diameter is the diameter that first procedure generates primacord, and rightmost roller groove diameter is the diameter of final products primacord.The power of roll motion is by one or several motor driven in synchronism.

Each breaker roll direction of rotation, rotational angular velocity ω is constant, and diameter D changes, and from left to right changes from small to big, i.e. D ₁＜D ₂＜...＜D _mN forming tank d is constant on every breaker roll, but from left to right d is descending, i.e. d ₁D ₂... d _m

Roll rotational speed ω determines: though roll rotational speed ω front and back all are the same, an optimum value is arranged, its size is according to production requirement, and factors such as thermal softening tubing speed, laser curing velocity, cold roller and deformed temperature rise speed and explosive thermostability are determined.In safety first, under the prerequisite of ensuring the quality of products, improve the roll rotation angular velocity omega as far as possible, thereby improve speed of production, reduce the production cost, increase economic efficiency.1-3000 rev/min of ω span.

Determining of primacord forming tank diameter: the diameter of primacord is determined by forming tank diameter on the roll.The forming tank cross section is semicircle, and groove is combined to form the circular section up and down.N forming tank diameter is the same in a pair roller, each between diameter d change: d ₁D ₂... d _m, d ₁Be that blank passes through rolling diameter behind first breaker roll, d _mBe the diameter that obtains by behind last breaker roll, i.e. product primacord diameter.What of roll logarithm are forming tank vary in diameter rate determined.If rate of change is excessive, the roll logarithm tails off, simplified equipment, but rolling resistance is big, and deflection is big, and blank temperature rise rate height is unfavorable to the security of explosive, and product quality is had bad influence; If rate of change is too small, resistance is little in the operation of rolling, and temperature rise rate is low, and distortion evenly, and is favourable to safety in production and product quality, but device systems becomes big, and synchronism requires high, and investment is big.Therefore forming tank vary in diameter rate will be determined according to experiment.By a large amount of experiments,

The present invention proposes the rate of change of d between 1-100mm, promptly $\begin{array}{c}{d}_1=2~200\mathrm{<figure-callout\; id="2"\; label="mm\; d"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">mm</figure-callout>}& \\ d_{}{}_2=d_1-(1~100)\\ {\mathrm{<figure-callout\; id="3"\; label="d"\; filenames="C200510040788E00091.png,C200510040788E00092.png"\; state="\{\{state\}\}">d</figure-callout>}}_3=d_2-(1~100)\\ d_m=d_{m-1}-(1~100)\end{array}$

Determining of roller diameter: after roll angular velocity omega and primacord forming tank diameter d and rate of change are determined, roller diameter D and rate of change thereof determine to become key parameter.Parameter ω, d has inner link between the D, and total principle is to guarantee that respectively organizing roll turns round continuously, also will satisfy forming tank charging discharging mass flow conservation.

$\frac{1}{4}{{\mathrm{\&pi;d}}_1}^2{V}_1\mathrm{\&rho;}=\frac{1}{4}{{\mathrm{\&pi;<figure-callout\; id="2"\; label="d"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">d</figure-callout>}}_2}^2{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">V</figure-callout>}}_2\mathrm{\&rho;}=......\frac{1}{4}{{\mathrm{\&pi;d}}_m}^2{V}_m\mathrm{\&rho;}---\left(1\right)$

V ₁---the linear velocity of the 1st breaker roll motion $V_1=\frac{1}{2}{D}_1\mathrm{\&omega;}$

V _m---the linear velocity of m breaker roll motion $V_m=\frac{1}{2}{D}_m\mathrm{\&omega;}$

ρ---primacord density is considered as constant

So (1) formula becomes

d ₁ ²V ₁＝d ₂ ²V ₂＝......d _m ²V _m (2)

d ₁ ²D ₁＝d ₂ ²D ₂＝......d _m ²D _m (3)

D ₁Come to determine span as required, generally get D ₁=10-500mm (4)

So ${\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">D</figure-callout>}}_2=\frac{{d_1}^2{D}_1}{{{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">d</figure-callout>}}_2}^2}$ $D_m=\frac{{d_1}^2{D}_1}{{d_m}^2}---\left(5\right)$

The safe high explosive of height is contained in the prefabricated extra heavy pipe, make the blank pipe right by many groups roll of arranged in series continuously, its reduction rate of taking turns intermarginal sulcus groove diameter of two adjacent groups roll is no more than 50%, environment temperature is controlled at 25 ℃, rolling speed per minute 30m, make the diameter reduction rate from large to small of blank pipe be no more than 50% at every turn,, produce satisfactory primacord at last to the primacord product diameter that reaches designing requirement.The sheet lead primacord that this routine finished product is 2mm.

The operation of rolling can adopt the television system monitoring, and the people isolates remote control to milling train, to guarantee safety.

The present invention adopts many breaker roll series connection to produce continuously, has n on every breaker roll to forming tank (n 〉=1), once can produce n root primacord, compact conformation, and equipment is little; The production efficiency height.Since the blank pipe be in forming tank, be squeezed the effect and diameter reduction does not have the pulling force effect, can not produce the accident of breaking.Product primacord degree of packing is even, and detonation is stable.

Quality examination: the primacord product external diameter that adopts the inventive method and equipment to roll out is even, estimates no outward appearance crack damage, and degree of packing is (1.5-1.6g/cm evenly ³), detonation velocity-stabilization in this scope, stretch-proof, water-resistance, grease resistance, heat resistance all is up to state standards.

Embodiment 2: adopt to become the rolling high pressure polyethylene plastic primacord of diameter roll roll mill

When described soft blank pipe adopts non-metallic pipe, in the extra heavy pipe of can be in the one-tenth pipe process of non-metallic pipe explosive being packed into continuously; When the blank pipe is selected plastics or heat deformable material for use, need heating source and insulation measure in operation.

In the present embodiment, adopt the high pressure polyethylene plastic pipe of internal diameter 10mm, external diameter 14mm to do the powder charge blank pipe of desensitized explosive.The safe high explosive of height is contained in the prefabricated extra heavy pipe.

The present embodiment concrete steps are as follows:

Make up a prescription: getting mass ratio is hexogen (RDX) 98%, adhesive 2%;

Powder charge: with vinyon blank Guan Yiduan sealing, an end opening is quantitatively adorned desensitized explosive by openend, and degree of packing is even about keeping, density 0.7g/cm ³, the powder charge after-opening section that finishes is also sealed;

Rolling: the blank pipe that will install desensitized explosive puts into that a pair roller wheel of primacord milling train is intermarginal need to push the groove that diameter is complementary with the blank pipe, and being provided with cross section, n road between every breaker roll is semicircular groove, and the 1-n root then can once feed intake.

Fig. 4 has provided the primacord mill milling primacord schematic diagram of equal diameter roll; Fig. 5, Fig. 6 are respectively the A-A of Fig. 4, the B-B generalized section.Further specify equal diameter roll operation principle below in conjunction with Fig. 4, Fig. 5 and Fig. 6:

Equal diameter roll equipment is that a series of circular diameter roll is installed on the platform that works online by certain variable angular velocity rule.Roller diameter is constant, and angular speed changes from small to big from left to right.This is realized by adjustable frequency motor and travelling gear.

Determining of roller diameter: as required, roller diameter D span 10-500mm.

Determining of primacord forming tank diameter: forming tank diameter d span is:

d ₁＝2～200mm

d ₂＝d ₁-(1～100)

d ₃＝d ₂-(1～100)

d _m＝d _m-1-(1～100)

Determining of roll angular speed: as roller diameter D, after the forming tank diameter d was determined, roll rotational speed ω just became key parameter, and relation also will satisfy the mass flow conservation principle between this three,

$\frac{1}{4}{{\mathrm{\&pi;d}}_1}^2{V}_1\mathrm{\&rho;}=\frac{1}{4}{{\mathrm{\&pi;<figure-callout\; id="2"\; label="d"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">d</figure-callout>}}_2}^2{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">V</figure-callout>}}_2\mathrm{\&rho;}=......\frac{1}{4}{{\mathrm{\&pi;d}}_m}^2{V}_m\mathrm{\&rho;}---\left(6\right)$

Wherein, $V_1=\frac{1}{2}{D}_1{\mathrm{\&omega;}}_1$ ${\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">V</figure-callout>}}_2=\frac{1}{2}{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">D</figure-callout>}}_2{\mathrm{\&omega;}}_2$ $V_m=\frac{1}{2}{D}_m{\mathrm{\&omega;}}_m$

D ₁=D ₂=...=D _mρ is a constant

So (6) formula becomes

d ₁ ²V ₁＝d ₂ ²V ₂＝......d _m ²V _m (7)

d ₁ ²ω ₁＝d ₂ ²ω ₂＝......d _m ²ω _m (8)

ω ₁Come as required to determine that span is ω ₁=1-200 rev/min

So, ${\mathrm{\&omega;}}_2=\frac{{d_1}^2{\mathrm{\&omega;}}_1}{{{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="C200510040788E00091.png"\; state="\{\{state\}\}">d</figure-callout>}}_2}^2}$ ${\mathrm{\&omega;}}_m=\frac{{d_1}^2{\mathrm{\&omega;}}_1}{{d_m}^2}---\left(9\right)$

The safe high explosive of height is contained in the prefabricated high pressure polyethylene plastic pipe, make the blank pipe right by many groups roll of arranged in series continuously, its reduction rate of taking turns intermarginal sulcus groove diameter of two adjacent groups roll is no more than 50%, environment temperature is controlled at 25 ℃, rolling speed per minute 40m makes the diameter reduction rate from large to small of blank pipe be no more than 50% at every turn.The final finished of present embodiment is the high pressure polyethylene plastic primacord of external diameter 1.5mm.

Quality examination: the primacord product external diameter that present embodiment rolls out is even, estimates no outward appearance crack damage, and degree of packing is (1.1-1.5g/cm evenly ³), detonation velocity-stabilization in this scope, stretch-proof, water-resistance, grease resistance, heat resistance all is up to state standards.

The primacord length that adopts the inventive method and equipment to roll out can be greater than 200m, and diameter and linear charging density are adjustable, can satisfy dual-use wilderness demand, and product has good market competition advantage.

Claims (3)

1. primacord rolling method, it is characterized in that: by mass ratio that the desensitized explosive of hexogen (RDX) 90-98% and adhesive 10-2% batching is fully bonding, mix, in the soft blank pipe of the end of packing into sealing, forming stacking density is 0.6-1.0g/cm ³Granular texture, the blank tube opening is sealed; This blank pipe that installs desensitized explosive put into a pair roller wheel of primacord milling train is intermarginal need to push the groove that diameter is complementary with the blank pipe, right by many group trench diameter roll from large to small continuously, the temperature that controls environment is at 20-40 ℃, rolling speed per minute is no more than 50m, make the diameter reduction rate from large to small of blank pipe be no more than 50%, to the primacord product diameter that reaches designing requirement at every turn.

2. primacord rolling method according to claim 1, be characterised in that: described soft blank pipe comprises the metal tube of lead pipe, aluminum pipe, tin-tube, copper pipe, terne metal pipe, hard lead pipe or lead-antimony alloy pipe; Or comprise the non-metallic pipe of vinyl tube, pvc tube, polytetrafluoroethylplastic plastic pipe, phenolic resins pipe or epoxy resin pipe.

3. primacord rolling method according to claim 1 is characterised in that: described rolling speed and blank pipe diameter reduction rate are that the mode that adopts equal diameter roll variable speed or become rotating speeds such as diameter roll realizes.

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