Dust-removing and environment-friendly explosive welding method

Abstract

The invention relates to the field of explosive welding layered metal composite materials, and provides a dust-removing and environment-friendly explosive welding method which comprises the following steps: manufacturing a water-sand foundation: placing an explosive welding device on the water-sand foundation; laying a water bag and a detonating cord on the periphery of the explosive welding device, and finally detonating the explosive welding device and the detonating cord at the same time to complete explosive welding of the layered metal composite material. According to the dust-removing and environment-friendly explosive welding method, the water-sand foundation serves as the explosive foundation, dust formation during explosive welding can be reduced from the source, and the interface bonding performance of the layered metal composite material is improved; the water bags are distributed around the explosive welding device, the detonating cord is detonated to explode to cause atomization of the water bags, the water bags make contact with dust generated by explosive welding, and the effect of rapid dust removal is achieved. The two dust removal methods act together, operation is easy, the explosive distribution state does not need to be changed, and the welding quality is not affected; and the dust removal effect is also greatly improved.

Description

Technical Field

[0001] The invention relates to the field of explosive welding of layered metal composite materials, in particular to a dust removal and environmentally friendly explosive welding method. Background Art

[0002] Explosion-welded layered metal composites are widely used in thermal power, petrochemical, water conservancy and hydropower, bridges, ships and other fields due to their corrosion resistance, transition connection and other functional characteristics. According to industry statistics, the annual demand for layered metal composites reaches 500,000 tons, and the explosive welding processing area requires 3 million square meters.

[0003] At present, explosive welding has achieved the metallurgical bonding of layered metal composite materials. However, a large number of explosive welding operations in China are mainly carried out in open-air environments in mountainous areas. The foundation of the construction site of explosive welding is generally clay or sand, and a large amount of dust will be generated under the action of the explosion shock wave.

[0004] At present, the main problems of this explosive welding method include the following aspects: 1. The explosion force is large and the dust is relatively dry, so it is difficult for the dust to fall quickly, which has a great impact on the health of on-site workers.

[0005] 2. Dust in the air can float to the inside of the substrate and the composite plate of the subsequent operation. It cannot be completely self-cleared during the explosion welding, which affects the interface bonding performance, especially the explosion welding bonding performance of non-ferrous metals such as titanium, aluminum, and silver, and even causes the risk of product scrapping.

[0006] 3. In order to minimize the impact of explosive welding dust on workers' health and interface composite quality, water spray equipment is used to spray dust into the air, which is inefficient and affects the efficiency of subsequent operations.

[0007] The patent with application number CN202210736391.8 in the prior art discloses an environmentally friendly method for producing explosive welding composite panels that can simultaneously suppress dust and reduce harm. First, the oxide layer of the surfaces to be bonded of the base plate and the composite plate is removed; secondly, the base plate is placed horizontally on the foundation, and a support body with consistent height is evenly arranged on the top surface to be bonded of the base plate, and then the surface to be bonded of the composite plate is placed face down on the top of the support body; then an explosive box is placed on the top of the composite plate, and expanded ammonium nitrate explosive is evenly arranged in the explosive box; then a plastic film is laid on the top of the expanded ammonium nitrate explosive, and then clean water is injected into the cavity formed by the plastic film in the explosive box; then the detonator is inserted vertically into the expanded ammonium nitrate explosive through the gap between the plastic film and the side wall of the explosive box, and against the middle of the inner wall of the explosive box; finally, the detonator is detonated to complete the explosive welding. Although this patent can simultaneously reduce dust and harmful gas diffusion during blasting, a plastic film is laid on top of the explosives, and then clean water is injected into the cavity formed by the plastic film. On the one hand, the operation is difficult and the flatness of the water layer is difficult to control; on the other hand, the mass of the water exerts force on the explosives, which will increase the density of the explosives under the water layer, change the performance of the explosives, and thus affect the welding quality; in addition, the dust removal effect is poor.

[0008] In view of this, the present invention is proposed. Summary of the invention

[0009] The purpose of the present invention is to propose a dust-removing and environmentally friendly explosion welding method to solve the problem that in the prior art, a plastic film is laid on the top of the explosive during explosion welding of layered metal composite materials, and then clean water is injected into the cavity formed by the plastic film. On the one hand, the operation is difficult and the flatness of the water layer is difficult to control; on the other hand, the mass of the water exerts force on the explosive, thereby increasing the density of the explosive under the water layer, changing the performance of the explosive, and further affecting the welding quality; in addition, the dust removal effect is poor.

[0010] To achieve the above object, the technical solution of the present invention is achieved as follows: A dust-removing and environmentally friendly explosion welding method, the explosion welding method comprising the following steps: S1. Make water and sand foundation: S2. Place the explosive welding device on the water and sand foundation; S3. Place water bags and detonating cords around the explosive welding device. S4. Finally, the explosive welding device and the detonating cord are detonated simultaneously to complete the explosive welding of the layered metal composite material.

[0011] The dust-removing and environment-friendly explosion welding method described in the present invention comprises steps S1 to S4 which are interrelated and inseparable. In step S1, the water-sand foundation is used as the explosion foundation, which can not only reduce the formation of dust during explosion welding from the root, but also the density of water-sand is increased relative to the density of dry sand, thereby reducing the stress reflection effect of the explosion welding stress wave formed when the composite plate collides with the substrate when it propagates to the substrate and the water-sand foundation, reducing the damage of the explosion reflection stress to the interface performance, and improving the interface bonding performance; in step S3, water bags and detonating cords are arranged around the explosion welding device, and in step S4, the detonating cords are detonated to cause the water bags to atomize, which contacts with the dust generated by the explosion welding, thereby achieving the effect of rapid dust removal. The dust-removing and environment-friendly explosion welding method described in the present invention has the advantages that, 1. it is easy to operate and improves the efficiency of explosion welding operation; 2. it does not need to change the distribution state of explosives, which not only does not affect the welding quality, but also can improve the interface bonding performance of layered metal composite materials; 3. it is dust-removing and environment-friendly: on the one hand, it can achieve the effect of rapid dust removal while completing the explosive welding manufacturing of layered metal composite materials; on the other hand, the two dust removal methods of water-sand foundation and water bag work together to greatly improve the dust removal effect and effectively protect the respiratory health of on-site operators; 4. it can also prevent dust from entering the surface of the substrate for subsequent explosion welding operations, thereby improving the quality of subsequent plate explosion welding; 5. the next explosion operation can be carried out 5 minutes after the explosion welding, thereby avoiding the influence of dust on subsequent operations, shortening the waiting time, and the welding quality of the second batch of operations still maintains a high level.

[0012] Furthermore, step S1 is specifically as follows: firstly, sand and water are uniformly mixed according to a certain mass ratio; then, a wooden frame of a certain height is built at the explosion site; and then, the wooden frame is filled with the water-sand mixture to form a water-sand foundation.

[0013] Furthermore, the mass ratio of the sand to the water is 85:15 to 75:25, and a mixer is used to mix the sand and the water evenly.

[0014] Furthermore, the length and width of the wooden frame are both 400 mm larger than the base plate of the explosive welding device, and the height of the wooden frame is 100 to 300 mm.

[0015] Furthermore, step S2 is specifically as follows: the explosive welding device includes a base plate, a support, a composite plate, explosives and a first detonator, the base plate is placed on the water-sand foundation, the support is installed on the surface of the base plate, the composite plate is placed above the support, and the explosives are laid on the upper surface of the composite plate.

[0016] Furthermore, the height of the support member is 5-20 mm.

[0017] Furthermore, step S3 is specifically as follows: placing water bags around the explosive welding device, placing detonating cords of the same length at the bottom of the water bags, and arranging a second detonator on the detonating cord.

[0018] Furthermore, in the width direction of the explosive welding device, the distance between the water bag and the explosive welding device is K1, and K1 satisfies: K1≥2m; in the length direction of the explosive welding device, the distance between the water bag and the explosive welding device is K2, and K2 satisfies: K2≥2m.

[0019] Furthermore, a water filling port is provided on the water bag, and the water filling port can be opened and closed.

[0020] Furthermore, step S4 is specifically as follows: inserting a first detonator into one end of the explosive, and detonating the first detonator and the second detonator at the same time, wherein the first detonator detonates the explosive, and the second detonator detonates the detonating cord.

[0021] The present invention proposes a dust-removing and environmentally friendly explosion welding method. Compared with the prior art, the dust-removing and environmentally friendly explosion welding method of the present invention has the following beneficial effects: 1. The dust-removing and environmentally friendly explosion welding method described in the present invention is simple to operate and improves the efficiency of the explosion welding operation.

[0022] 2. The dust-removing and environmentally friendly explosion welding method described in the present invention does not require changing the explosive distribution state, does not affect the welding quality, and can also improve the interface bonding performance of the layered metal composite material.

[0023] 3. The dust-removing and environmentally friendly explosion welding method described in the present invention is dust-removing and environmentally friendly, can quickly reduce dust and absorb toxic gases, and effectively protect the respiratory health of on-site operators.

[0024] 4. The dust-removing and environmentally friendly explosion welding method described in the present invention can also prevent dust from entering the surface of the substrate in the subsequent explosion welding operation, thereby improving the quality of subsequent plate explosion welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic cross-sectional structure diagram of an explosion welding device used in a dust-removing and environmentally friendly explosion welding method according to an embodiment of the present invention; Figure 2 The diagram is a top view of the structure of a dust removal and environmentally friendly explosion welding method according to an embodiment of the present invention.

[0026] Description of reference numerals: 1. First detonator; 2. Explosives; 3. Double plate; 4. Support; 5. Base plate; 6. Water-sand foundation; 7. Second detonator; 8. Water bag; 9. Detonating cord; 10. Explosive welding device. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The descriptions of "first", "second", etc. mentioned in the embodiments of the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Example 1

[0029] In the prior art, when explosive welding layered metal composite materials, a plastic film is laid on top of the explosive 2, and then clean water is injected into the cavity formed by the plastic film. On the one hand, the operation is difficult and the flatness of the water layer is difficult to control; on the other hand, the mass of the water exerts force on the explosive 2, thereby increasing the density of the explosive 2 under the water layer, changing the performance of the explosive 2, and thus affecting the welding quality; in addition, there is the problem of poor dust removal effect.

[0030] In order to solve the above technical problems, Figure 1~2 As shown, this embodiment provides a dust removal and environmentally friendly explosion welding method, which includes the following steps: S1. Make water and sand foundation 6: S2, placing the explosive welding device 10 on the water-sand foundation 6; S3, laying water bags 8 and detonating cords 9 around the explosive welding device 10, S4. Finally, the explosion welding device 10 and the detonating cord 9 are simultaneously detonated to complete the explosion welding of the layered metal composite material.

[0031] The dust-removing and environment-friendly explosion welding method described in the present invention comprises steps S1 to S4 which are interrelated and inseparable. In step S1, the water-sand foundation 6 is used as the explosion foundation, which can not only reduce the formation of dust during explosion welding from the root, but also the density of water-sand is increased relative to the density of dry sand, thereby reducing the stress reflection effect of the explosion welding stress wave formed when the composite plate 3 collides with the substrate 5 when it propagates to the substrate 5 and the water-sand foundation 6, thereby reducing the damage of the explosion reflection stress to the interface performance and improving the interface bonding performance; in step S3, water bags 8 and detonating cords 9 are placed around the explosion welding device 10, and in step S4, the explosion of the explosion welding device 10 and the detonating cord 9 causes the water bag 8 to atomize and contact with the dust generated by the explosion welding, thereby achieving the effect of rapid dust removal; the water-sand foundation 6, the water bag 8, the detonating cord 9 and the explosion welding device 10 are interrelated and inseparable, and play multiple roles: 1. Simple operation, improving the efficiency of explosion welding.

[0032] 2. Reduce dust formation: Water-sand foundation 6 as the explosion foundation can reduce the formation of dust during explosion welding from the source.

[0033] 3. Improve the interface bonding performance: There is no need to change the distribution state of explosive 2, which not only does not affect the welding quality, but also can improve the interface bonding performance of layered metal composite materials; this is because the density of water sand is relatively larger than that of dry sand, thereby reducing the stress reflection effect, and further reducing the damage of the explosion reflection stress to the interface performance.

[0034] 4. Rapid dust removal: The explosion of the detonating cord 9 causes the water bag 8 to atomize, which quickly contacts the dust generated by the explosive welding, achieving a dust removal effect and further reducing the dust concentration in the air.

[0035] 5. Protect workers' health: effectively reduce the dust and toxic gases in explosive welding operations, and protect the respiratory health of on-site operators.

[0036] 6. Improve work efficiency: The next blast operation can be carried out 5 minutes after the blast welding, which avoids the influence of dust on subsequent operations and shortens the waiting time; and the welding quality of the second batch of operations still maintains a high level.

[0037] 7. Improve welding quality: prevent dust from entering the surface of the substrate 5 of the subsequent explosion welding operation, and improve the quality of subsequent plate explosion welding.

[0038] Specifically, step S1 is as follows: firstly, sand and water are uniformly mixed according to a certain mass ratio; then, a wooden frame of a certain height is built at the blasting site; and then, the wooden frame is filled with the water-sand mixture to form a water-sand foundation 6.

[0039] Specifically, the mass ratio of the sand to the water is 85:15 to 75:25, and a mixer is used to mix the sand and the water evenly.

[0040] Specifically, the length and width of the wooden frame are both 400 mm larger than the base plate 5 of the explosive welding device 10 , and the height of the wooden frame is 100 to 300 mm.

[0041] Specifically, step S2 is as follows: the explosive welding device 10 includes a substrate 5, a support 4, a composite plate 3, explosives 2 and a first detonator 1, the substrate 5 is placed on a water-sand foundation 6, the support 4 is installed on the surface of the substrate 5, the composite plate 3 is placed above the support 4, and the explosives 2 are laid on the upper surface of the composite plate 3.

[0042] Specifically, the height of the support member 4 is 5-20 mm.

[0043] Specifically, the support member 4 is made of metal.

[0044] Specifically, the support member 4 may be made of copper, aluminum, or stainless steel, but is not limited thereto.

[0045] More specifically, in this embodiment, the support member 4 is made of copper.

[0046] Specifically, the detonation velocity of the explosive 2 is 1800-2500 m / s.

[0047] Specifically, step S3 is as follows: placing water bags 8 around the explosive welding device 10 , placing detonating cords 9 of the same length at the bottom of the water bags 8 , and arranging a second detonator 7 on the detonating cords 9 .

[0048] More specifically, in this embodiment, the water bag 8 is arranged in a mouth shape.

[0049] Specifically, in the width direction of the explosive welding device 10, the distance between the water bag 8 and the explosive welding device 10 is K1, and K1 satisfies: K1≥2m; in the length direction of the explosive welding device 10, the distance between the water bag 8 and the explosive welding device 10 is K2, and K2 satisfies: K2≥2m.

[0050] Specifically, the water bag 8 is a plastic cylindrical bag, and a water injection port is arranged on the water bag 8, and the water injection port can be opened and closed.

[0051] Specifically, the diameter of the plastic cylindrical bag is 100-300 mm, and the diameter of the detonating cord 9 is 2-8 mm.

[0052] Specifically, step S4 is as follows: inserting the first detonator 1 into one end of the explosive 2, and simultaneously detonating the first detonator 1 and the second detonator 7, wherein the first detonator 1 detonates the explosive 2, and the second detonator 7 detonates the detonating cord 9, thereby achieving rapid dust removal while realizing explosive welding.

[0053] The explosion of the explosive 2 pushes the composite plate 3 and the base plate 5 to achieve explosion welding, and the explosion of the detonating cord 9 causes the water in the water bag 8 to atomize around and contact with the dust generated by the explosion welding, thereby achieving a rapid dust removal effect.

[0054] Since the water-sand foundation 6 is saturated with a certain amount of water, it has a certain dust removal effect. In addition, the explosion of the detonating cord 9 causes the water inside the water bag 8 to atomize around, and combines with the dust generated in the surrounding area of ​​the explosive welding to achieve the dust removal effect again.

[0055] The purpose of the present invention is to provide a manufacturing method that can quickly reduce explosion welding dust, reduce the damage of dust to the health of workers on site, and improve interface bonding performance and operating efficiency.

[0056] The present invention innovatively proposes a water-sand foundation 6 as an explosion foundation on the traditional sand foundation, which not only reduces the formation of dust during explosion welding, but also increases the density of water-sand relative to that of dry sand, thereby reducing the stress reflection effect of the explosion welding stress wave formed when the composite plate 3 collides with the substrate 5 and propagates to the substrate 5 and the water-sand foundation 6, reducing the damage of the explosion reflection stress to the interface performance, and improving the interface bonding performance.

[0057] The present invention innovatively proposes a dust removal method of placing water bags 8 around the explosive welding device 10. The water bags 8 are atomized by the explosion of the detonating cord 9 and come into contact with the dust generated by the explosive welding, thereby achieving a rapid dust removal effect.

[0058] The present invention effectively reduces the dust in the explosion welding operation by adopting the above two dust removal methods, which not only effectively protects the respiratory health of on-site operators, but also prevents dust from entering the surface of the substrate 5 of the subsequent explosion welding operation, thereby improving the quality of subsequent plate explosion welding.

[0059] By adopting the above two dust removal methods, the present invention does not need to use additional spray dust reduction equipment after the explosion, thus saving process costs; it can also achieve the next explosion operation 5 minutes after the explosion welding, greatly shortening the waiting time and improving the operation efficiency.

[0060] More specifically, in this embodiment, the base plate 5 is 16 mm CCSB steel, and the length and width specifications of the base plate 5 are 1000×2500 mm; the composite plate 3 is 6 mm TA1, and the length and width specifications of the composite plate 3 are 1000×2500 mm.

[0061] More specifically, step S1 is as follows: firstly, sand and water are uniformly mixed according to a certain mass ratio; then, a wooden frame of a certain height is built at the blasting site; and then, the wooden frame is filled with the water-sand mixture to form a water-sand foundation 6.

[0062] More specifically, the mass ratio of the sand to the water is 80:20, and a mixer is used to mix the sand and the water evenly.

[0063] More specifically, the length of the wooden frame is 2900 mm, the width of the wooden frame is 1400 mm, and the height of the wooden frame is 100 mm.

[0064] More specifically, the height of the support member 4 is 9 mm; the material of the support member 4 is copper.

[0065] Specifically, the explosive 2 is a powdered emulsion explosive, and the thickness of the explosive 2 is 40 mm.

[0066] Specifically, the diameter of the water bag 8 is 150 mm, and the length of the water bag 8 is 26000 mm.

[0067] The diameter of the detonating cord 9 is 2 mm, and the length of the detonating cord 9 is the same as the length of the water bag 8 .

[0068] In this embodiment, the detonating cord 9 is fixed to the bottom of the water bag 8 using adhesive tape.

[0069] Specifically, in the width direction of the explosive welding device 10, the distance between the water bag 8 and the explosive welding device 10 is K1, and K1 satisfies: K1=2m; in the length direction of the explosive welding device 10, the distance between the water bag 8 and the explosive welding device 10 is K2, and K2 satisfies: K2=2m.

[0070] After the explosion is completed, wait for 5 minutes before entering the site to carry out the next batch of operations.

[0071] The content of the second batch of jobs is exactly the same as that of the first batch. Example 2

[0072] In this embodiment, different from the embodiment 1, The mass ratio of the sand to water is 85:15.

[0073] The height of the wooden frame is 300 mm.

[0074] Specifically, the height of the support member 4 is 5 mm; the material of the support member 4 is stainless steel.

[0075] K1=2.5m, K2=2.5m.

[0076] Specifically, the diameter of the plastic cylindrical bag is 100 mm, and the diameter of the detonating cord 9 is 4 mm. Example 3

[0077] In this embodiment, different from the embodiment 1, The mass ratio of sand to water is 75:25. The height of the wooden frame is 200 mm.

[0078] Specifically, the height of the support member 4 is 20 mm; the material of the support member 4 may also be stainless steel.

[0079] K1=2.2m, K2=2.2m.

[0080] Specifically, the diameter of the plastic cylindrical bag is 300 mm, and the diameter of the detonating cord 9 is 8 mm.

[0081] Comparative Example 1 Explosion welding is performed using the explosion welding method of Example 1 of the patent with prior art application number CN202210736391.8.

[0082] The shear performance and composite rate of the metal composite materials obtained by explosive welding using the explosive welding method described in Examples 1 to 3 and Comparative Example 1 were tested. The test standard for shear performance is GB / 6396-2008, and the test standard for composite rate is NB / T47013.3-2023. The test results of shear performance and composite rate are shown in Table 1.

[0083] Explosion welding was performed using the explosion welding method described in Examples 1 to 3 and Comparative Example 1, and the dust concentration 5 minutes after the explosion was tested. The results are shown in Table 1.

[0084]

[0085] It can be seen from Table 1 that the layered metal composite materials obtained by explosive welding using the explosive welding method described in Examples 1 to 3, whether in the first batch or the second batch, have a shear performance greater than or equal to 302 MPa, a composite rate of 100%, and a dust concentration less than 8 mg / m 5 minutes after the explosion. 3 .

[0086] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A dust-removing and environmentally friendly explosion welding method, characterized in that: The explosion welding method comprises the following steps: S1. Make water and sand foundation (6): S2. placing the explosive welding device (10) on the water-sand foundation (6); S3. Lay water bags (8) and detonating cords (9) around the explosive welding device (10). S4. Finally, the explosive welding device (10) and the detonating cord (9) are simultaneously detonated to complete the explosive welding of the layered metal composite material.

2. The dust-removing and environmentally friendly explosion welding method according to claim 1, characterized in that: Step S1 specifically comprises: firstly, mixing sand and water evenly in a certain mass ratio; then, building a wooden frame of a certain height at the blasting site; and then, filling the wooden frame with the water-sand mixture to form a water-sand foundation (6).

3. The dust-removing and environmentally friendly explosion welding method according to claim 2 is characterized in that: The mass ratio of the sand to the water is 85:15 to 75:25, and a mixer is used to mix the sand and the water evenly.

4. The dust-removing and environmentally friendly explosion welding method according to claim 2 is characterized in that: The length and width of the wooden frame are both 400 mm larger than the base plate (5) of the explosive welding device (10), and the height of the wooden frame is 100 to 300 mm.

5. The dust-removing and environmentally friendly explosion welding method according to claim 1 is characterized in that: Step S2 specifically comprises: the explosive welding device (10) comprises a base plate (5), a support member (4), a composite plate (3), explosives (2) and a first detonator (1); the base plate (5) is placed on the water-sand foundation (6); the support member (4) is installed on the surface of the base plate (5); the composite plate (3) is placed above the support member (4); and the explosives (2) are laid on the upper surface of the composite plate (3).

6. The dust-removing and environmentally friendly explosion welding method according to claim 5 is characterized in that: The support member (4) has a height of 5 to 20 mm.

7. The dust-removing and environmentally friendly explosion welding method according to claim 5 is characterized in that: Step S3 specifically comprises: placing water bags (8) around the explosive welding device (10), placing detonating cords (9) of the same length at the bottom of the water bags (8), and arranging a second detonator (7) on the detonating cords (9).

8. The dust-removing and environmentally friendly explosion welding method according to claim 7 is characterized in that: In the width direction of the explosive welding device (10), the distance between the water bag (8) and the explosive welding device (10) is K1, and K1 satisfies: K1 ≥ 2 m; in the length direction of the explosive welding device (10), the distance between the water bag (8) and the explosive welding device (10) is K2, and K2 satisfies: K2 ≥ 2 m.

9. The dust-removing and environmentally friendly explosion welding method according to claim 8, characterized in that: The water bag (8) is provided with a water injection port, and the water injection port can be opened and closed.

10. The dust-removing and environmentally friendly explosion welding method according to claim 7, characterized in that: Step S4 specifically comprises: inserting a first detonator (1) into one end of the explosive (2), and simultaneously detonating the first detonator (1) and the second detonator (7), wherein the first detonator (1) detonates the explosive (2), and the second detonator (7) detonates the detonating cord (9).

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