CN102699552B - Underwater manual rapid cutting material - Google Patents

Abstract

The invention relates to an underwater manual rapid cutting material, which is characterized in that: it is a hollow tubular structure composed of an external cutting pipe and a plurality of internal cutting wires, and there is an insulating layer on the outside of the cutting pipe; wherein the cutting pipe is made of The steel pipe prepared by the forging process is coated with a 0.1mm thick copper layer on the inside and outside of the steel pipe by electroplating technology; the cutting wire is composed of an outer skin and a powder core, and the outer skin includes two materials, one of which is a steel strip , the other skin is an aluminum strip, the ratio of the cut wires of two different skin materials is 2:1 to 6:1, and the powder core is composed of Cu ₂ O powder 3 to 20% in weight percentage, CuO Al powder 5-25%, Al powder 2-10%, rare earth cerium 1-7%, the balance is Fe powder. This material is used for rapid cutting and disassembly of steel structures and reinforced concrete in underwater environments, without cutting gas and cutting power, high cutting efficiency, wide range of cutting objects, convenient and safe to carry, simple operation and low cost.

Description

A rapid cutting material by hand under water

technical field

The invention belongs to the technical field of metal material cutting for underwater manual rapid cutting, and relates to a manual underwater rapid cutting material.

Background technique

The 21st century is the century of the ocean. With the development of the ocean, a large number of offshore buildings have been built. At the same time, a large number of underwater buildings such as abandoned docks and abandoned drilling platforms will need to be demolished to remove obstacles for navigation. The difficulty of breaking the barriers of these underwater buildings is that the underwater part of the structure can only be dismantled underwater, and these underwater buildings have reinforced concrete structures, which also increases the difficulty of dismantling.

At present, the underwater cutting technology is mainly used to dismantle underwater metal structures and reinforced concrete structures. The commonly used underwater cutting technologies are aerobic-combustible gas cutting, underwater oxygen-arc Jet cutting, underwater plasma cutting, explosive cutting, etc. Oxygen-combustible gas cutting is not suitable for cutting corrosion-resistant steel, stainless steel, cast iron and non-ferrous metals other than titanium. Underwater oxygen-arc cutting, metal-arc cutting, underwater mechanical cutting, water jet cutting, and underwater plasma cutting are all Live work is required, and there are potential safety hazards. Moreover, the equipment required for water jet cutting and underwater plasma cutting is more complicated, expensive, bulky and difficult to carry, and explosive cutting is more dangerous.

Patent application CN201010536018.5 discloses a manual rapid cutting material, a manual rapid cutting material, characterized in that: a hollow tubular structure composed of external cutting pipes and internal multiple cutting wires, wherein the cutting pipes are The steel pipe prepared by forging process, the inside and outside of the steel pipe is plated with 0.1mm thick copper plating layer by electroplating process; the length of the cutting wire is the same as that of the cutting pipe, and it is composed of an outer skin and a powder core, and the outer skin is low carbon steel 08F steel strip, its chemical composition is: by weight percentage, C 0.05%～0.11%, Si≤0.03%, Mn 0.25%～0.50%, P≤0.035%, S≤0.035%, Ni≤0.25%, Cr≤ 0.10%, the rest is iron and unavoidable impurities; the powder core is composed of 2-8% CuO powder, 0.4-2% rare earth cerium, and iron powder as the balance. However, the powder core components and component content of the manual rapid cutting material are only suitable for cutting in air, and the heat released by the combustion of the exothermic alloy CuO and Fe in oxygen is far from enough to support the continuous burning of the cutting material in water , so that it cannot satisfy its underwater cutting.

Therefore, there is an urgent need to develop an underwater cutting material that does not require cutting gas and cutting power, has fast cutting speed, safety, portability, simple operation and low cost on the basis of studying the principle of high energy generated by arc ignition exothermic alloy materials. , for rapid cutting and disassembly of steel structures and reinforced concrete in underwater environments.

Contents of the invention

Aiming at the defects of various existing underwater cutting technologies, the present invention utilizes the combustion characteristics of exothermic materials in oxygen to provide a cutting machine that does not require cutting gas and cutting power, has high cutting efficiency, wide range of cutting objects, is easy to carry, safe and easy to operate. A simple and low-cost underwater manual rapid cutting material and a preparation method thereof are used for rapid cutting and cracking of underwater metal and reinforced concrete.

The technical solution of the present invention is: an underwater manual rapid cutting material, characterized in that the cutting material is composed of an external cutting pipe and a plurality of internal cutting wires, and there is an insulating layer on the outside of the cutting pipe; the cutting wire The length of the material is the same as the length of the cutting pipe, and the cutting wire is composed of a skin and a powder core. The skin includes two materials, one of which is an SPCC-SD type cold-rolled steel strip, and its chemical composition is: in weight percentage, C ≤0.15%, Mn≤0.60%, P≤0.1%, S≤0.025%, the rest is iron and unavoidable impurities; the other sheath is aluminum strip, and the ratio of cutting wires of two different sheath materials is 2: 1-6:1, the powder core is composed of 3-20% of _Cu2O powder, 5-25% of CuO powder, 2-10% of Al powder, 1-7% of rare earth cerium, and the balance is Fe powder.

Further, the external cutting pipe is a steel pipe prepared by a forging process, and the inside and outside of the steel pipe are each plated with a 0.1mm thick copper layer by electroplating technology. The cutting wires are evenly distributed along the inner wall of the external cutting pipe, and The central position of the pipe forms a hollow structure.

Furthermore, the outer cutting pipe is wound from a composite metal strip, thereby realizing the flexible bending of the cutting pipe, and the cutting wire is evenly distributed along the inner wall of the outer pipe, and forms a hollow structure at the center of the cutting pipe.

Further, the upper and lower surfaces of the composite metal strip are respectively plated with a 0.1 mm thick copper plating layer by electroplating process.

Further, the composite metal strip has a thick middle part and thin edges; during the winding process of the composite metal strip, the edges overlap each other, and the thickness after the overlapping of the edges is consistent with the thickness of the middle part of the composite metal strip, so that after winding and cutting the wire material, a The outer surface of the cut tubing is smooth.

Further, the particle size of the iron powder is -80 to 200 mesh, the particle size of the CuO powder is -80 to 200 mesh, the particle size of the Cu ₂ O powder is -80 to 200 mesh, and the particle size of the rare earth cerium is -300 mesh.

Further, the insulating layer is a layer of polyethylene tape wound on the outside of the cut pipe or an epoxy resin layer coated on the outside of the cut pipe.

Further, the ratio of the diameter of the cutting wire to the wall thickness of the cutting pipe is in the range of 2.1-3.

Further, the SPCC-SD type cold-rolled steel strip is replaced with a low-carbon steel 08F steel strip, and the chemical composition after replacement is: by weight percentage, C 0.05% to 0.11%, Si≤0.03%, Mn 0.25% to 0.50% , P≤0.035%, S≤0.035%, Ni≤0.25%, Cr≤0.10%, and the rest are iron and unavoidable impurities.

Further, the SPCC-SD type cold-rolled steel strip is replaced with a low-carbon steel 08F steel strip. The chemical composition of the low-carbon steel 08F steel strip is: by weight percentage, C 0.05%～0.11%, Si≤0.03%, Mn 0.25 %～0.50%, P≤0.035%, S≤0.035%, Ni≤0.25%, Cr≤0.10%, and the rest are iron and unavoidable impurities.

The beneficial effects of the present invention are:

1) Portability, the whole system mainly includes arc ignition power supply, industrial oxygen cylinder, cutting gun, etc. During the cutting process, the battery arc ignition power supply and industrial oxygen cylinder are above the water surface, and the operator only needs to carry the cutting gun and cutting materials in the water It can be carried by a single person without the need for complex and heavy equipment like mechanical cutting and plasma cutting;

2) No need for cutting power and cutting gas, only need to ignite the cutting material underwater to disconnect the arc ignition power supply, with the help of oxygen combustion, use the heat released by the cutting material itself to support the further continuous combustion of the underwater manual rapid cutting material Cutting the workpiece does not require cutting power and cutting gas;

3) By changing the material of the outer skin, especially after using aluminum as the outer skin, the flammability of the cutting material is enhanced, and the energy released during the combustion process is further improved;

4) High cutting efficiency, manual rapid cutting material combustion can reach a high temperature above 5000 ℃, the cutting efficiency is 8-20 times that of oxygen-combustible gas cutting, has a high cutting speed, and high cutting efficiency.

5) The range of cutting objects is wide, and the underwater manual rapid cutting of materials is to use the heat released by the material combustion itself to support the further continuous combustion of the cutting materials. The cutting materials of the present invention even operate underwater at a water depth of more than 60 meters. The material is not limited by the material composition of the cutting object like the oxy-acetylene flame. It can cut all metal materials, and can also cut non-metallic materials such as concrete, brick or rock, and the cutting object has a wide range.

6) The cost is low. The underwater manual rapid cutting material does not require complex equipment, and the material used is mainly iron, so the manufacturing cost is relatively low.

Description of drawings

Accompanying drawing 1 is the underwater manual rapid cutting material schematic diagram that cutting pipe material is made of steel pipe;

Accompanying drawing 2 is the cross-sectional schematic diagram of the underwater manual quick-cutting material that cutting pipe material constitutes composite metal strip;

Accompanying drawing 3 is the cross-sectional schematic diagram of the underwater manual rapid cutting material of specification 1;

Accompanying drawing 4 is the cross-sectional schematic diagram of the underwater manual rapid cutting material of specification 2;

Accompanying drawing 5 is the cross-sectional schematic diagram of the underwater manual rapid cutting material of specification 3;

Accompanying drawing 6 is the schematic diagram of composite metal belt.

Among them, 1-cut pipe; 2-cut wire; 3-wire sheath; 4-insulation layer

Detailed ways

Below in conjunction with embodiment and accompanying drawing 1～6, the present invention will be further described:

A kind of underwater manual rapid cutting material described in the present invention, this cutting material is made up of external cutting pipe material and internal multiple cutting wires, and there is an insulating layer on the outside of cutting pipes; the length of the cutting wires is the same as the length of cutting pipes Similarly, the cutting wire is composed of a sheath and a powder core. The sheath includes two materials, one of which is a low-carbon steel strip, and the other is an aluminum strip. The ratio of the cutting wires of the two different sheath materials is 2:1-6:1, the powder core is calculated by weight percentage, and the composition is 3-20% of _Cu2O powder, 5-25% of CuO powder, 2-10% of Al powder, 1-7% of rare earth cerium, and the remaining The amount is Fe powder.

The purpose of adding Cu ₂ O powder and CuO powder to the cutting wire in the present invention is to use Cu ₂ O powder and CuO powder to react with aluminum and iron to release a large amount of heat, so as to support the smooth progress of underwater cutting. When the weight percentage of Cu ₂ O powder is less than 3%, and the weight percentage of CuO powder is less than 5%, the heat released is less, and the cutting speed is lower, and when the weight percentage of Cu ₂ O powder is greater than 20%, and the weight percentage of CuO powder is greater than 25%. , The reaction is violent, the burning speed is too fast, and it is not easy to control. Adding Cu ₂ O powder and CuO powder at the same time can make the reaction process stable and continuous, and the underwater cutting process is also relatively stable. The addition of Al powder is because aluminum reacts with Cu ₂ O powder and CuO powder to release a large amount of heat, and the content range is determined by the content of Cu ₂ O powder and CuO powder.

The addition of rare earth cerium can improve the combustion efficiency of the cutting material and promote the full combustion of the cutting material in oxygen. When the weight percentage of rare earth cerium is less than 1%, the improvement of combustion efficiency is very small. In the range of 1-7%, with the increase of the weight ratio of rare earth cerium, the improvement of combustion efficiency is also greater, but more than 7%, the improvement of combustion efficiency has little change compared with 7%, but the price of rare earth cerium is higher, in order to save costs, it is selected as 1-7%.

In a preferred embodiment of the present invention, a kind of sheath is SPCC-SD type cold-rolled steel strip, and its chemical composition is: by weight percentage, C≤0.15%, Mn≤0.60%, P≤0.1%, S≤0.025% , the rest are iron and unavoidable impurities; the powder core is composed of 3-20% of Cu ₂ O powder, 5-25% of CuO powder, 2-10% of Al powder, and 1-7% of rare earth cerium in terms of weight percentage. , and the balance is Fe powder. Another skin material is aluminum.

According to the different requirements of engineering applications, the sheath steel strip can also be low-carbon steel 08F steel strip: by weight percentage, C 0.05% ~ 0.11%, Si≤0.03%, Mn 0.25% ~ 0.50%, P≤0.035%, S ≤0.035%, Ni≤0.25%, Cr≤0.10%, and the rest are iron and unavoidable impurities.

According to the different needs of engineering applications, cutting materials with different specifications can be processed, such as:

Specification 1: Select a forged seamless steel pipe with a wall thickness of about 0.7mm, and then use an electroplating process to coat a copper plating layer with a thickness of about 0.1mm on both sides of the inner and outer sides, or prepare a composite steel pipe with a three-layer structure of copper-iron-copper As for the pipe material, the upper and lower surfaces of the composite metal strip for manufacturing the composite pipe material are each plated with a 0.1 mm thick copper plating layer by an electroplating process.

To prepare the composite metal strip, the forging process can be used to prepare an iron-copper-iron composite metal strip with a thickness of 0.8mm, and then copper plating. The copper plating process is acetone degreasing-water washing-7% dilute hydrochloric acid derusting-water washing- Electroplating nickel primer-water washing-copper plating-water washing-drying; then the composite metal strip is wound on multiple cutting wires to prepare a cutting material with a hollow structure. There is an insulating layer on the outside of the cutting pipe, which is made of a A polyethylene tape is formed by wrapping the outside of the cut pipe. As shown in Figure 6, the composite metal strip has a structure with a thick middle part and thin edges; during the process of winding the composite metal strip to make a composite pipe, the edges overlap each other, and the thickness after the overlapping of the edges is consistent with the thickness of the middle part of the composite metal strip, thus The outer surface of the resulting cut tubing is smoothed.

The total wall thickness of the cut pipe is about 0.9 mm; the inner diameter is 5.2 mm, the outer diameter is 7 mm, and the length of the prepared cut pipe is about 600 mm.

The diameter of the cutting wire is 2.4mm, the length is about 600mm, and a total of 3 pieces are assembled in the cutting pipe. The cutting wires are evenly distributed along the inner wall of the outer pipe, and form a hollow structure at the center of the cut pipe.

Specification 2: Choose a forged seamless steel pipe with a wall thickness of about 0.8mm, and then use an electroplating process to coat a copper layer with a thickness of about 0.1mm on both sides of the inner and outer sides. As mentioned above, or prepare a copper-iron-copper three Composite pipes with layer structure. The total wall thickness of the pipe is about 1 mm; the inner diameter is 6.6 mm, the outer diameter is 8.6 mm, and the length of the prepared cut pipe is about 600 mm.

The diameter of the cutting wire is 2.4mm, the length is about 600mm, and a total of 5 pieces are assembled in the cutting pipe.

Specification 3: Select a forged seamless steel pipe with a wall thickness of about 0.8mm, and then use an electroplating process to coat a copper layer with a thickness of about 0.1mm on both sides of the inner and outer sides. As mentioned above, or prepare a copper-iron-copper three Composite pipes with layer structure. The total wall thickness of the pipe is about 1mm; the inner diameter is 8mm, the outer diameter is 10mm, and the length of the prepared cut pipe is about 600mm.

The diameter of the cutting wire is 2.4mm, the length is about 600mm, and a total of 7 pieces are assembled in the cutting pipe.

It is found through experimental research that the ratio of the diameter of the cutting wire to the wall thickness of the cutting pipe is in the range of 2.1-3, which can achieve a better combustion effect.

According to the different needs of engineering applications, different weight percentages of powder cores can be used to process and cut materials, such as:

Example 1

Wherein, the particle size of the iron powder is -80 to 200 mesh, the particle size of the CuO powder is -80 to 200 mesh, the particle size of the Cu ₂ O powder is -80 to 200 mesh, and the particle size of the rare earth cerium is -300 mesh.

Then, it is manufactured by multi-roller continuous rolling and multi-channel continuous wire drawing and diameter reduction through a multifunctional powder core wire forming machine. After strip cutting, strip rolling, powder filling, sealing, wire drawing, straightening and shearing processes, it can be obtained Cut the wire; the wire preparation speed is about 40m/min, and the straightening speed is about 5m/min.

The steel pipe prepared by the forging process is used as the external cut pipe, and the inside and outside of the steel pipe are plated with a 0.1mm thick copper layer by electroplating process; the polyethylene tape is used to wrap the outside of the cut pipe as an insulating layer.

Assembling three cutting wires into the inner cavity of the cutting pipe to form underwater manual rapid cutting materials, two of which are made of low-carbon steel and one of which is made of aluminum.

Wherein, the cutting pipe can also use the above-mentioned copper-iron-copper three-layer composite pipe, and the cutting pipe wound by the composite metal strip can realize the flexible bending of the cutting pipe, and is coiled together like a soft rope.

Table 1

Powder core ingredients % by weight Cu ₂ O powder 3% CuO powder 5% Aluminum powder 10% rare earth cerium 1% iron powder Surplus

The underwater manual rapid cutting material prepared by the above method was tested on a 45# steel plate with a thickness of 20 mm at a water depth of 1 meter, and the cutting speed was 0.6 mm/s.

Example 2

The difference between this embodiment and Example 1 is that Al powder, Fe powder, Cu ₂ O powder, CuO powder and rare earth alloy powder are evenly mixed according to the content ratio shown in Table 2, and five cutting wires are assembled In the inner cavity of the cut pipe, 4 of them are steel sheathed and 1 is aluminum sheathed. The wire preparation speed is about 120m/min, and the straightening speed is about 22m/min.

Table 2

Powder core ingredients % by weight Cu ₂ O powder 20% CuO powder 5%

Aluminum powder 5% rare earth cerium 7% iron powder Surplus

The underwater manual rapid cutting material prepared by the above method was tested on a 45# steel plate with a thickness of 20 mm at a water depth of 1 meter, and the cutting speed was 1.4 mm/s.

Wherein, the cutting pipe can also use the above-mentioned copper-iron-copper three-layer composite pipe, and the cutting pipe wound by the composite metal strip can realize the flexible bending of the cutting pipe, and is coiled together like a soft rope.

Example 3

The difference between this embodiment and Example 1 is that Al powder, Fe powder, Cu ₂ O powder, CuO powder and rare earth alloy powder are uniformly mixed according to the content ratio shown in Table 3, and the pipe contains 7 wires At this time, 1 to 3 of them can be covered with metal powder in aluminum sheath, and the rest are covered with metal powder in iron sheath. The wire preparation speed is about 80m/min, and the straightening speed is about 18m/min.

Wherein, the cutting pipe can also use the above-mentioned copper-iron-copper three-layer composite pipe, and the cutting pipe wound by the composite metal strip can realize the flexible bending of the cutting pipe, and is coiled together like a soft rope.

table 3

Powder core ingredients % by weight Cu ₂ O powder 10% CuO powder 25% Aluminum powder 2% rare earth cerium 7% iron powder Surplus

The underwater manual rapid cutting material prepared by the above method was tested on a 45# steel plate with a thickness of 20 mm at a water depth of 1 meter, and the cutting speed was 2.5 mm/s.

The material of the present invention can be applied to the cutting of underwater metal materials or non-metal materials; usually non-metal materials can be concrete, bricks or rocks, and in addition, the cutting pipes made of composite metal strips can realize the flexible bending of cutting pipes , therefore, its length may not be limited by the underwater environment and equipment.

Claims (5)

1. a material for fast hand cutting under water, this cutting material is made up of the incising pipes of outside and many inner cutting wire materials, has a layer insulating outside incising pipes; Cutting wire material length is identical with incising pipes length, it is characterized in that: cutting wire material is made up of crust and powder core, crust comprises bi-material, a kind of crust is SPCC-SD type cold-rolled strip, and its chemical composition is: by weight percentage, C≤0.15%, Mn≤0.60%, P≤0.1%, S≤0.025%, all the other are Fe and inevitable impurity; Another kind of crust is aluminium strip, and the ratio of the cutting wire material of two kinds of different skin materials is 2:1 ~ 6:1, and powder core by weight percentage, consists of Cu ₂o powder 3 ~ 20%, CuO powder 5 ~ 25%, Al powder 2 ~ 10%, cerium 1 ~ 7%, surplus is Fe powder,

Outside incising pipes is the steel pipe adopting Forging Technology to be prepared from, and the inside and outside electroplating technology that adopts of steel pipe is respectively coated with the thick copper plate of 0.1mm, cutting wire material incising pipes inner wall even distribution externally, and forms hollow structure in incising pipes center;

Or the incising pipes of outside is formed by composite metal belt coiling, and realize the flexible bending of incising pipes thus, externally pipe material inner wall is uniform for described cutting wire material, and forms hollow structure in incising pipes center; Composite metal belt is that mid portion is thick, the structure of thin edge; In composite metal belt winding process, edge is overlapped, the consistency of thickness of the thickness after imbricate and composite metal belt mid portion, thus the outer surface smoother of the incising pipes formed after making to be wound around cutting wire material;

Fe Powder Particle Size is-80 ~ 200 orders, and CuO Powder Particle Size is-80 ~ 200 orders, Cu ₂o Powder Particle Size is-80 ~ 200 orders, and cerium granularity is-300 orders.

2. a material for fast hand cutting under water as claimed in claim 1, is characterized in that: the upper and lower surface of described composite metal belt adopts electroplating technology to be respectively coated with the thick copper plate of 0.1mm.

3. a material for fast hand cutting under water as claimed in claim 1, is characterized in that: described insulating barrier is the polyethylene glue belt be wrapped in outside incising pipes or the epoxy resin layer be coated in outside incising pipes.

4. a material for fast hand cutting under water as claimed in claim 1, is characterized in that: the ratio scope of the described diameter of cutting wire material and the wall thickness of incising pipes is 2.1 ~ 3.

5. a material for fast hand cutting under water as claimed in claim 1, it is characterized in that: replace SPCC-SD type cold-rolled strip with mild steel 08F steel band, the chemical composition of mild steel 08F steel band is: by weight percentage, C0.05% ~ 0.11%, Si≤0.03%, Mn 0.25% ~ 0.50%, P≤0.035%, S≤0.035%, Ni≤0.25%, Cr≤0.10%, all the other are Fe and inevitable impurity.