Dust-removing and environment-friendly explosive welding method

Abstract

The present application relates to the field of explosive welding layered metal composite material, and provides an explosive welding method with dust removal and environmental protection, comprising: making a water-sand base; placing an explosive welding device on the water-sand base; laying water bags and detonating cords around the explosive welding device; and finally simultaneously detonating the explosive welding device and the detonating cords to complete the explosive welding of the layered metal composite material. The explosive welding method with dust removal and environmental protection can reduce the formation of dust during explosive welding from the root cause, and improve the interface bonding performance of the layered metal composite material. The water bags are laid around the explosive welding device, and the detonating cords are detonated to cause the water bags to be atomized, and the atomized water contacts the dust generated by the explosive welding to achieve the effect of rapid dust removal. The two dust removal methods work together, are simple to operate, do not need to change the explosive distribution state, and do not affect the welding quality. The dust removal effect is also greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of explosive welding layered metal composite material, in particular, relates to a dust-free and environmentally friendly explosive welding method. BACKGROUND

[0002] Explosive welding layered metal composite material is widely used in thermal power, petrochemical industry, water conservancy and hydropower, bridges, ships and other fields due to its corrosion resistance, transition connection and other functional characteristics. According to industry statistics, the demand for layered metal composite material is 500,000 tons per year, and the explosive welding processing area is 3 million square meters.

[0003] Currently, explosive welding realizes the metallurgical bonding of layered metal composite material, but currently a large number of explosive welding operations in China are mainly carried out in mountainous open environments, and the foundation of the explosive welding construction site is generally clay or sand. Under the action of explosive shock wave, a large amount of dust will be generated.

[0004] The main problems of the current explosive welding method include the following aspects:

[0005] 1. The explosive force is large and the dust is relatively dry, so the dust is difficult to fall quickly, which has a great impact on the health of the on-site operators.

[0006] 2. The dust in the air can fall into the inside of the base plate and the composite plate of the subsequent operation, and cannot be completely self-cleaned during explosive welding, which affects the interface bonding performance, especially for the explosive welding of non-ferrous metals such as titanium, aluminum and silver, which has a serious impact on the bonding performance, and even causes the risk of product scrap.

[0007] 3. In order to minimize the impact of explosive welding dust on the health of workers and the quality of interface composite, water spraying equipment is used to spray dust in the air, which has low efficiency and affects the efficiency of subsequent operations.

[0008] The patent with application number CN202210736391.8 in the prior art discloses a production method of an environment-friendly explosive welding composite plate capable of synchronously inhibiting dust and reducing harm, first, the surfaces to be combined of the base plate and the composite layer plate are subjected to oxidation layer treatment; second, the base plate is horizontally placed on the foundation, and the support bodies with the same height are uniformly arranged on the top of the base plate at the surfaces to be combined, then the surface to be combined of the composite layer plate is placed on the top of the support bodies; then the explosive box is placed on the top of the composite layer plate, and the expanded ammonium nitrate explosive is uniformly arranged in the explosive box; then the plastic film is laid on the top of the expanded ammonium nitrate explosive, and then the clear water is injected into the cavity formed by the plastic film in the explosive box; then the detonator is vertically inserted into the expanded ammonium nitrate explosive through the gap between the plastic film and the side wall of the explosive box and abutting against the middle part of the inner wall of the explosive box; finally, the detonator is detonated to complete the explosive welding. Although the patent can realize the effects of reducing dust and reducing the diffusion of harmful gas at the same time of blasting, the plastic film is laid on the top of the explosive, and then the clear water is injected into the cavity formed by the plastic film, on the one hand, the operation difficulty is large, and the flatness of the water layer is not easy to control; on the other hand, the quality of the water exerts force on the explosive, so that the density of the explosive under the water layer is increased, the performance of the explosive is changed, and then the welding quality is affected; in addition, the dust removal effect is poor.

[0009] Therefore, the present application is proposed. SUMMARY

[0010] The present application aims to provide a dust-removing and environment-friendly explosive welding method to solve the problems in the prior art that the plastic film is laid on the top of the explosive, and then the clear water is injected into the cavity formed by the plastic film when the layered metal composite material is welded by explosion, on the one hand, the operation difficulty is large, and the flatness of the water layer is not easy to control; on the other hand, the quality of the water exerts force on the explosive, so that the density of the explosive under the water layer is increased, the performance of the explosive is changed, and then the welding quality is affected; in addition, the dust removal effect is poor.

[0011] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0012] A dust-removing and environment-friendly explosive welding method, the explosive welding method comprises the following steps:

[0013] S1, water-sand foundation is made;

[0014] S2, the explosive welding device is placed on the water-sand foundation;

[0015] S3, water bags and detonating cords are laid around the explosive welding device,

[0016] S4, finally, the explosive welding device and the detonating cords are detonated at the same time to complete the explosive welding of the layered metal composite material.

[0017] The dust-removing and environment-friendly explosive welding method has the advantages that: 1. simple operation and improved explosive welding operation efficiency; 2. without the need of changing the explosive distribution state, the welding quality is not affected, and the interface bonding performance of the layered metal composite material is improved; 3. dust-removing and environment-friendly: on one hand, the dust-removing effect is achieved quickly while the layered metal composite material is manufactured by explosive welding; on the other hand, the dust-removing effect is greatly improved by the joint action of the water-sand base and the water bag, and the respiratory health of the on-site operators is effectively protected; 4. the dust entering the surface of the substrate of the subsequent explosive welding operation is avoided, and the quality of the subsequent plate explosive welding is improved; 5. the next explosive operation can be performed 5 minutes after the explosive welding, the influence of the dust on the subsequent operation is avoided, the waiting time is shortened, and the welding quality of the second batch is still high.

[0018] Further, the step S1 specifically comprises the following steps: first, uniformly mixing sand and water according to a certain mass ratio; second, erecting a wooden frame with a certain height in the explosive site; and third, filling the wooden frame with the water-sand mixture to form a water-sand base.

[0019] Further, the mass ratio of the sand and water is 85:15-75:25, and a stirrer is used to uniformly stir the sand and water.

[0020] Further, the length and width of the wooden frame are both 400 mm larger than those of the substrate of the explosive welding device, and the height of the wooden frame is 100-300 mm.

[0021] Further, the step S2 specifically comprises the following steps: the explosive welding device comprises a substrate, a support, a clad plate, an explosive and a first detonator; the substrate is placed on the water-sand base; the support is installed on the surface of the substrate; the clad plate is placed above the support; and the explosive is laid on the upper surface of the clad plate.

[0022] Further, the height of the support is 5-20 mm.

[0023] Further, the step S3 specifically comprises the following steps: water bags are placed around the explosive welding device; detonating cords with the same length as the water bags are placed at the bottom of the water bags; and a second detonator is arranged on the detonating cord.

[0024] Further, in the width direction of the explosive welding device, the distance between the water bag and the explosive welding device is K1, 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, K2 satisfies: K2≥2m.

[0025] Further, a water inlet is arranged on the water bag, and the water inlet can be opened and closed.

[0026] Further, step S4 is specifically: inserting a first detonator at one end of the explosive, and simultaneously detonating the first detonator and a second detonator, wherein the first detonator detonates the explosive, and the second detonator detonates the detonating cord.

[0027] The present application provides a kind of explosion welding method of dust removal environmental protection, relative to prior art, the present application described a kind of explosion welding method of dust removal environmental protection has the following beneficial effects:

[0028] 1. The explosion welding method of dust removal environmental protection described in the present application is simple to operate, and improves the efficiency of explosion welding operation.

[0029] 2. The explosion welding method of dust removal environmental protection described in the present application does not need to change the explosive distribution state, which not only does not affect the welding quality, but also improves the interface bonding performance of layered metal composite material.

[0030] 3. The explosion welding method of dust removal environmental protection described in the present application is environmentally friendly, can quickly reduce dust and absorb toxic gases, and effectively protects the respiratory health of on-site operators.

[0031] 4. The explosion welding method of dust removal environmental protection described in the present application can also prevent dust from entering the surface of the substrate in subsequent explosion welding operation, thereby improving the quality of subsequent plate explosion welding. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 The cross-sectional structure diagram of the explosive welding device used in the explosion welding method of dust removal environmental protection described in the embodiment of the present application is shown in the figure.

[0033] Fig. 2 The top view structure diagram of the explosion welding method of dust removal environmental protection described in the embodiment of the present application is shown in the figure.

[0034] Explanation of reference signs:

[0035] 1, first detonator; 2, explosive; 3, cover plate; 4, support; 5, base plate; 6, water and sand foundation; 7, second detonator; 8, water bag; 9, detonating cord; 10, explosive welding device. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The description of "first", "second" and the like in the embodiments of the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of a person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0037] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Embodiment 1

[0038] In the prior art, a plastic film is laid on the top of the explosive 2 during explosive welding of layered metal composite material, 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 not easy to control. On the other hand, 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 further affecting the welding quality. In addition, the dust removal effect is poor.

[0039] In order to solve the above technical problems, as shown in the present embodiment, an explosive welding method with dust removal and environmental protection is provided, and the explosive welding method comprises the following steps: Figs. 1-2

[0040] S1, making a water-sand base 6:

[0041] S2, placing the explosive welding device 10 on the water-sand base 6;

[0042] S3, laying water bags 8 and detonating cords 9 around the explosive welding device 10,

[0043] S4, finally, simultaneously detonating the explosive welding device 10 and the detonating cord 9 to complete the explosive welding of the layered metal composite material.

[0044] ​The dust-removing and environment-friendly explosive welding method has the steps S1-S4 which are interrelated and inseparable, the water-sand base 6 in the step S1 is used as the explosive base, which can reduce the formation of dust in the explosive welding from the root, the density of the water-sand base 6 is relatively increased compared with the dry sand, the stress reflection effect of the stress wave formed by the collision between the clad plate 3 and the base plate 5 when the explosive welding stress wave is propagated to the base plate 5 and the water-sand base 6 is reduced, the damage of the explosive reflection stress to the interface performance is reduced, and the interface bonding performance is improved; the water bags 8 and the detonating cords 9 are arranged around the explosive welding device 10 in the step S3, the water bags 8 are atomized by the explosion of the detonating cords 9 caused by the explosion of the explosive welding device 10 in the step S4, and the dust generated by the explosive welding is contacted with the atomized water, so that the dust-removing effect is achieved; the water-sand base 6, the water bags 8, the detonating cords 9 and the explosive welding device 10 are interrelated and inseparable, and have multiple effects.

[0045] I. Simple operation, improves the explosive welding operation efficiency.

[0046] II. Reduces the formation of dust: the water-sand base 6 is used as the explosive base, which can reduce the formation of dust in the explosive welding from the root.

[0047] III. Improves the interface bonding performance: the explosive 2 does not need to be changed, which does not affect the welding quality and can improve the interface bonding performance of the layered metal composite material; this is because the density of the water-sand base 6 is relatively increased compared with the dry sand, so that the stress reflection effect is reduced, and the damage of the explosive reflection stress to the interface performance is reduced.

[0048] IV. Rapid dust removal: the water bags 8 are atomized by the explosion of the detonating cords 9 caused by the explosion of the explosive welding device 10, which is rapidly contacted with the dust generated by the explosive welding, so that the dust-removing effect is achieved, and the dust concentration in the air is further reduced.

[0049] V. Protects the health of workers: effectively reduces the dust and toxic gas in the explosive welding operation, and protects the respiratory health of the on-site operators.

[0050] VI. Improves the operation efficiency: the next explosive operation can be performed 5 minutes after the explosive welding, which avoids the influence of the dust on the subsequent operation and shortens the waiting time; and the welding quality of the second batch is still maintained at a high level.

[0051] VII. Improves the welding quality: avoids the dust into the surface of the base plate 5 in the subsequent explosive welding operation, and improves the quality of the subsequent plate explosive welding.

[0052] Specifically, the step S1 specifically comprises: uniformly mixing sand and water according to a certain mass ratio; building a wood frame with a certain height in the explosive site; and then filling the wood frame with the water-sand mixture to form the water-sand base 6.

[0053] Specifically, the mass ratio of the sand and the water is 85:15~75:25, and a blender is used to stir the sand and the water evenly.

[0054] Specifically, the length and width of the wood frame are 400mm larger than the base plate 5 of the explosive welding device 10, and the height of the wood frame is 100~300mm.

[0055] Specifically, the step S2 is specifically as follows: the explosive welding device 10 includes a base plate 5, a support 4, a clad plate 3, an explosive 2 and a first detonator 1, the base plate 5 is placed on the water-sand foundation 6, the support 4 is installed on the surface of the base plate 5, the clad plate 3 is placed above the support 4, and the explosive 2 is laid on the upper surface of the clad plate 3.

[0056] Specifically, the height of the support 4 is 5~20mm.

[0057] Specifically, the material of the support 4 is metal.

[0058] Specifically, the material of the support 4 can be copper, the material of the support 4 can also be aluminum, and the material of the support 4 can also be stainless steel, without being limited thereto.

[0059] More specifically, in the embodiment, the material of the support 4 is copper.

[0060] Specifically, the detonation velocity of the explosive 2 is 1800~2500m / s.

[0061] Specifically, the step S3 is specifically as follows: the water bags 8 are placed around the explosive welding device 10, the same length of the detonating cord 9 is placed at the bottom of the water bags 8, and the second detonator 7 is arranged on the detonating cord 9.

[0062] More specifically, in the embodiment, the water bags 8 form a mouth-shaped pattern.

[0063] Specifically, in the width direction of the explosive welding device 10, the distance between the water bags 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 bags 8 and the explosive welding device 10 is K2, and K2 satisfies: K2≥2m.

[0064] Specifically, the water bags 8 are plastic cylindrical bags, a water inlet is arranged on the water bags 8, and the water inlet can be opened and closed.

[0065] Specifically, the diameter of the plastic cylindrical bag is 100~300mm, and the diameter of the detonating cord 9 is 2~8mm.

[0066] Specifically, step S4 is specifically: inserting the first detonator 1 at one end of the explosive 2, and simultaneously initiating the first detonator 1 and the second detonator 7, the first detonator 1 detonates the explosive 2, and the second detonator 7 detonates the detonating cord 9, so as to realize explosion welding and rapid dust removal at the same time.

[0067] The explosive 2 explosion pushes the cladding plate 3 and the base plate 5 to realize explosion welding, and the detonating cord 9 explosion makes the water in the water bag 8 atomize to the surrounding, and contacts the dust generated by explosion welding, so as to achieve the effect of rapid dust removal.

[0068] Since the water-sand base 6 contains a certain amount of water, it has a certain dust removal effect, and in addition, the detonating cord 9 explosion makes the water in the water bag 8 atomize to the surrounding, and combines with the dust generated by explosion welding in the surrounding area, so as to achieve the effect of dust removal again.

[0069] The purpose of the present application is to provide a manufacturing method capable of rapidly reducing explosion welding dust, reducing the damage of dust to the health of workers on site, and improving the interface bonding performance and operation efficiency.

[0070] The present application innovatively proposes the water-sand base 6 as an explosion base on the basis of the traditional sandy base, which not only reduces the formation of dust during explosion welding, but also increases the density of the water-sand base 6 compared with the dry sand, reduces the stress reflection effect of the explosion welding stress wave formed when the cladding plate 3 collides with the base plate 5 to the base plate 5 and the water-sand base 6, reduces the damage of the explosion reflection stress to the interface performance, and improves the interface bonding performance.

[0071] The present application innovatively proposes the dust removal method of arranging the water bag 8 around the explosion welding device 10, which atomizes the water bag 8 through the explosion of the detonating cord 9, contacts the dust generated by explosion welding, and achieves the effect of rapid dust removal.

[0072] The present application effectively reduces the dust of explosion welding operation by adopting the above two dust removal methods, not only effectively protects the respiratory health of workers on site, but also avoids the dust entering the surface of the base plate 5 in the subsequent explosion welding operation, and improves the quality of the subsequent plate explosion welding.

[0073] The present application adopts the above two dust removal methods, and does not need to use additional spray dust removal equipment after explosion, which saves the process cost; and the next explosion operation can be performed 5 minutes after explosion welding, which greatly shortens the waiting time and improves the operation efficiency.

[0074] More specifically, in the embodiment, the base plate 5 is 16mm CCSB steel, and the size of the base plate 5 is 1000*2500mm; the cladding plate 3 is 6mm TA1, and the size of the cladding plate 3 is 1000*2500mm.

[0075] More specifically, the step S1 is specifically: first, mix sand and water uniformly according to a certain mass ratio; second, build a wooden frame of a certain height at the explosion site; and then fill the wooden frame with the water-sand mixture to form a water-sand foundation 6.

[0076] More specifically, the mass ratio of the sand and water is 80:20, and a blender is used to stir the sand and water uniformly.

[0077] More specifically, the length of the wooden frame is 2900mm, the width of the wooden frame is 1400mm, and the height of the wooden frame is 100mm.

[0078] More specifically, the height of the support 4 is 9mm, and the material of the support 4 is copper.

[0079] Specifically, the explosive 2 is a powdery emulsion explosive, and the thickness of the explosive 2 is 40mm.

[0080] Specifically, the diameter of the water bag 8 is 150mm, and the length of the water bag 8 is 26000mm.

[0081] The diameter of the detonating cord 9 is 2mm, and the length of the detonating cord 9 is the same as the length of the water bag 8.

[0082] In this embodiment, the detonating cord 9 is fixed to the bottom of the water bag 8 by using adhesive tape.

[0083] Specifically, in the width direction of the explosion welding device 10, the distance between the water bag 8 and the explosion welding device 10 is K1, and K1 satisfies: K1=2m; and in the length direction of the explosion welding device 10, the distance between the water bag 8 and the explosion welding device 10 is K2, and K2 satisfies: K2=2m.

[0084] After the explosion is completed, 5 minutes are waited before entering the site for the next batch of work.

[0085] The content of the second batch of work is exactly the same as that of the first batch. Embodiment 2

[0086] In this embodiment, different from embodiment 1 is that,

[0087] The mass ratio of the sand and water is 85:15.

[0088] The height of the wooden frame is 300mm.

[0089] Specifically, the height of the support 4 is 5mm, and the material of the support 4 is stainless steel.

[0090] K1=2.5m, and K2=2.5m.

[0091] Specifically, the diameter of the plastic cylindrical bag is 100mm, and the diameter of the detonating cord 9 is 4mm. Example 3

[0092] In this embodiment, different from example 1,

[0093] The mass ratio of the sand to the water is 75:25,

[0094] The height of the wooden frame is 200mm.

[0095] Specifically, the height of the support 4 is 20mm; the material of the support 4 can also be stainless steel.

[0096] K1=2.2m, K2=2.2m.

[0097] Specifically, the diameter of the plastic cylindrical bag is 300mm, and the diameter of the detonating cord 9 is 8mm.

[0098] Comparative example 1

[0099] The explosion welding method of example 1 of the patent with the prior art application number CN202210736391.8 is used for explosion welding.

[0100] The metal composite materials obtained by the explosion welding methods of examples 1-3 and comparative example 1 are subjected to shear performance and composite rate tests, the test standard of the shear performance is GB / 6396-2008, the test standard of the composite rate is NB / T47013.3-2023, and the test results of the shear performance and the composite rate are shown in table 1.

[0101] The explosion welding methods of examples 1-3 and comparative example 1 are used for explosion welding, and the dust concentration 5min after explosion is tested, and the results are shown in table 1.

[0102]

[0103] As can be seen from table 1, the layered metal composite materials obtained by the explosion welding methods of examples 1-3, whether the first batch or the second batch, have a shear performance greater than or equal to 302MPa, a composite rate of 100%, and a dust concentration less than 8mg / m 3 .

[0104] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, therefore the protection scope of the present application should be subject to the range defined by the claims.

Claims

1. A dust-removing environment-friendly explosive welding method, characterized in that, The explosion welding method comprises the following steps: S1, making a water-sand base (6); S2, placing the explosion welding device (10) on the water-sand base (6); S3, laying water bags (8) and detonating cords (9) around the explosion welding device (10); S4, finally, simultaneously detonating the explosion welding device (10) and the detonating cord (9) to complete the explosion welding of the layered metal composite material; The step S1 specifically comprises: first, uniformly mixing sand and water according to a certain mass ratio; second, building a wooden frame with a certain height in the explosion site; and third, filling the wooden frame with the water-sand mixture to form the water-sand base (6); The mass ratio of the sand and the water is 85:15-75:25, and a stirrer is used to uniformly stir the sand and the water; The step S3 specifically comprises: placing the water bags (8) around the explosion welding device (10), placing the detonating cords (9) with the same length at the bottom of the water bags (8), and setting the second detonator (7) on the detonating cord (9); In the width direction of the explosion welding device (10), the distance between the water bag (8) and the explosion welding device (10) is K1, and K1 satisfies: K1≥2m; in the length direction of the explosion welding device (10), the distance between the water bag (8) and the explosion welding device (10) is K2, and K2 satisfies: K2≥2m; The water bag (8) is provided with a water inlet, and the water inlet can be opened and closed; The water bag (8) encloses a mouth-shaped form; the water bag (8) is a plastic cylindrical bag, the diameter of the plastic cylindrical bag is 100-300mm, and the diameter of the detonating cord (9) is 2-8mm; The explosion welding device (10) comprises a base plate (5), a support (4), a cover plate (3), an explosive (2), and a first detonator (1); The step S4 specifically comprises: inserting the first detonator (1) into one end of the explosive (2), simultaneously detonating the first detonator (1) and the second detonator (7), detonating the explosive (2) by the first detonator (1), and detonating the detonating cord (9) by the second detonator (7).

2. The method according to claim 1, wherein The length-width ratio of the wooden frame is 400mm larger than that of the base plate (5) of the explosion welding device (10), and the height of the wooden frame is 100-300mm.

3. The method according to claim 1, wherein the method is a dust-removing and environmentally friendly explosive welding method. The step S2 specifically comprises: placing the base plate (5) on the water-sand base (6), installing the support (4) on the surface of the base plate (5), placing the cover plate (3) above the support (4), and laying the explosive (2) on the upper surface of the cover plate (3).

4. The method according to claim 3, wherein The height of the support (4) is 5-20mm.

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