Design scheme of the most explosive project

2022-07-26
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Explosive engineering design scheme

II. Project overview

explosive compounding of metal composite materials is a processing technology that takes explosives as energy and uses the huge energy generated by explosive explosion to compound two or more metals with different properties together in a very short time. The installation method of explosive compounding is mainly the parallel installation method, and the initiation methods include edge initiation and middle initiation, The specific installation method and explosion mechanism are shown in the following figure:

brief introduction of explosion composite mechanism is as follows:

when the explosive is triggered by thunder, the explosion products form a high-voltage pulse load in a very short time, which causes the composite plate to bend and extend from the initiation point, and then have a high-speed oblique collision with the substrate, resulting in high-speed and severe plastic deformation in the collision area, accompanied by severe thermal effect, which breaks the metal inner surface facial mask, The jet is generated on the inner surface of the two metal plates. Generally, the jet is generated at the front end of the impact point of the main interface of the control software to wash the surface dirt, so that the metal can expose the clean original surface. Under the high-voltage pulse load, the two metals can achieve metallurgical bonding

using the explosive composite processing technology, the laminated metal composite plates produced have been widely used in petrochemical, salt making, electric power and other industries, and the market prospect is quite broad. The main varieties of composite plates produced by our explosive composite method are: titanium and titanium alloy/steel composite plates, stainless steel/steel composite plates, nickel and nickel alloy/steel composite plates, so that the hot samples such as films can be easily manipulated like heavy injection molded parts Copper and copper alloy/steel composite plate, aluminum and aluminum alloy composite plate, etc

III. site overview

the explosion site is located at * *, with a usable area of 3000 square meters. The explosion site is surrounded by mountains on all sides, and there is only one road in and out of this area. It is the special explosion site of our factory. (4) the spring testing machine is driven by the electromechanical and reducer connecting cam to drive the connecting rod to move back and forth, four bends from north to south, leading to the mountains. The * * mountains surround the explosion site in the mountains, There are no residential buildings and other construction facilities within 2km around. The shock wave generated by the explosion of explosives, the earthquake and other explosion products spread to a distance of 100m and attenuated to the minimum, without any impact on the surrounding area. The excess metal flyers, dust and stones from the explosion are within a safe distance of 50m. When initiating the explosion, the surrounding area shall be guarded. The warning range is: 1) 100m away from the South and North ends of the explosion site; 2) 100m away from the East Mountains in the West: 3) the detonator is 300 meters away from the operation site and has a shelter; 4) Each warning point shall be marked with an obvious yellow flag: the quantity of primary explosive shall be less than 3000 kg as required, in line with the relevant provisions of safety regulations for blasting (GB 6722-2003)

IV. main control points and technical parameters

l. the key points of composite control of metal material explosion are: first, the control of explosive dosage on site, which must be controlled within the range of design requirements; second, do a good job of safety alert to ensure safe production

to ensure safe production: in the explosive composite process design, the design charge quantity process must be carried out alternately. The production process must be designed according to the thickness and overall dimension of the material. The safe, effective and reasonable process flow must be ensured. Each operator must perform his own job responsibilities in strict accordance with the relevant provisions of the safety code for blasting (GB 6722-2003)

2. Main technical parameters

1) the explosive used for explosive compounding is a mixed explosive made of expanded ammonium nitrate explosive and refined salt sodium chloride. The 8

2) the determination of the charge per unit area is formulated by theoretical calculation and practical experience.

a: the formulation of the gap.

before the explosion, a certain number of metal gaps are placed in the spacing between the two plates to ensure the uniformity of the spacing. The explosive compounding process is realized by the high-speed collision between the clad plate and the substrate under the explosive detonation with the help of the gap distance. Therefore The gap between the clad plates is the main technological parameter of explosive cladding

according to empirical formula: h=a1( ρ δ) 0.6

ρ— Density of clad plate, g/cm2, δ— The thickness of clad plate and mm

a1 are constants related to the type of explosive, usually 1 ~ 1.2

taking ㎜, titanium clad plate as an example, h=6 ~ 18 ㎜

in the test, h1=6 ㎜, h2=12 ㎜, h3=16 ㎜

b: Calculation of charge amount (charge height) per unit area

during explosive welding of large-area composite plates, WG is commonly used to calculate the total charge amount

wg=a2( ρδ) 0.6 σ S0.2 h - 0.5

where: WG - dosage per unit area, unit: g/cm2

h - height of gap, unit: mm, σ S - yield limit of clad plate, unit: mpa

δ— Thickness of clad plate, in mm, ρ— Density of clad plate, unit: g/cm23

a2, is a constant related to composite materials. Generally, 0.3 ~ 0.4

take ㎜ titanium clad plate as an example. When the gap is h1=6 ㎜, h2=8 ㎜, h3=10 ㎜, calculate wg=3g ~ 5.50 g/cm2. In the test, h=30 is taken as the drug height. The mine delivery is not smooth, 35 and 45 ㎜

the theoretical calculation formula is:

wg=al( ρ•δ) zero point six σ S h-0.5

where the specific gravity of composite material is 4.51g/cm2

Δ— Composite thickness mm

σ S - yield strength of composite material kg/m

h - gap height mm

as the composite layer is made of titanium and titanium alloy materials, the explosive quantity is controlled as follows:

thickness 2-4 ㎜ selection of explosive quantity: 30-40kg/m2

thickness 5-8 ㎜ selection of explosive quantity: 55-70kg/m2

thickness 8-10mm selection of explosive quantity: 75-90kg/m2

v. safety measures

1. Carefully implement relevant provisions in gb6722-2003 safety regulations for blasting matters, And implement it concretely

2. Strengthen the safety management of civil explosives in strict accordance with the regulations on the management of civil explosives, implement various safety management systems and measures, and prohibit illegal and regulatory operations. It is strictly prohibited to transport civil explosives beyond the limit, transport without license, and mixed loading of people and goods

3. Explosive production shall not be arranged in thunderstorm days. Normal production can be carried out in high and low temperature climate with wind force below grade III. Field safety operation procedures shall be strictly implemented during field production

4. Strengthen the storage of blasting equipment to prevent loss

5. During the installation of detonators, a full-time person shall be reserved on site for operation, and the connection shall be in series, and the warning personnel shall be notified for warning

6. The warning personnel shall stick to their posts and must reach their respective warning positions so that the personnel near the blasting warning area can see them clearly

7. Before detonating, the detonating operator must contact the vigilantes at each warning point, and detonate immediately after one long whistle and three short whistles

8. No one is allowed to enter the explosion site within three minutes after the detonation. Follow up work can be carried out on the site only after the detonation personnel check the site and confirm all the waterfalls

VI. responsibilities and requirements of on-site operators

in order to strengthen the safety work, ensure the safety and reliability of explosive compound operation, and ensure the safety of the site, all personnel have the right to stop all acts in violation of the regulations, and can directly report to the enterprise legal person or the superior public security organ

1 the on-site operation shall be carried out in strict accordance with the process flow requirements formulated by the process technician

2 all operators on site must be familiar with various safety measures and requirements, and establish a high sense of security

3 the personnel entering the work site must be closed, and it is not allowed to carry kindling materials and ignition sources into the site. If any, stop all work immediately and take them out of the work site strictly

4 it is strictly forbidden to construct blindly or brutally

5 after the completion of blasting operation, clean up the site according to their respective responsibilities, jointly check the usage of explosives and detonators, and make on-site production records

7 explosion compound and site safety leading group

1. Technical director: *

2. Safety director: *

3 project technician: *

4 blasting safety officer: *

5 blasting safety officer: *

6 blasting explosives and detonators: *

7 blasting Officer: **

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