Underwater oxygen arc cutting mechanism

Abstract

The utility model relates to underwater cutting technical field provides a kind of underwater oxygen arc cutting mechanism, the mechanism includes gas supply assembly, cutting assembly and lead arc subassembly;Gas supply assembly includes oxygen cylinder and oxygen pipeline, the first end of oxygen pipeline is connected in oxygen cylinder;Cutting assembly includes cutting cabinet and cutting piece, cutting cabinet is connected in the second end of oxygen pipeline, cutting piece is connected in cutting cabinet, cutting piece and the preset cutting angle between the workpiece to be cut are present;Lead arc subassembly includes power supply, power supply is connected in cutting cabinet by power-off control part, power supply is connected in the workpiece to be cut.The utility model utilizes the high temperature generated by underwater electric arc, so that oxygen and the workpiece to be cut produce chemical reaction heat, heat and melt the workpiece to be cut, and melt metal and oxidized slag in cutting seam are blown away by the impetus of oxygen flow, to form cutting seam, and cutting piece and the preset cutting angle between the workpiece to be cut are present, effectively improve cutting effect, and then facilitate the removal of workpiece after cutting.

Description

Technical Field

[0001] This utility model relates to the field of underwater cutting technology, and in particular to an underwater oxygen arc cutting mechanism. Background Technology

[0002] Traditional methods for removing steel pipe piles mainly rely on mechanical excavation and blasting. Mechanical excavation is suitable for shallow pile foundations, but it faces many limitations in aquatic environments. While blasting can solve the removal problem to some extent, it has a significant impact on the surrounding environment, especially in urban areas, where noise pollution and vibration risks limit its application.

[0003] In existing technologies, vibratory hammer technology has been widely used in the extraction of underwater steel pipe piles due to its unique advantages. Vibratory hammers utilize the principle of high-frequency vibration to reduce the friction between the steel pipe pile and the surrounding soil, thereby achieving easy extraction.

[0004] However, despite the excellent performance of vibratory hammer technology in many cases, it still falls short in certain special situations when it comes to the extraction of steel pipe piles. For example, it cannot effectively remove steel pipe piles that are tightly bound to the soil due to long-term immersion in water, or that are difficult to extract by vibration due to corrosion, deformation, or other reasons. Utility Model Content

[0005] This invention provides an underwater oxygen arc cutting mechanism to solve the defect in the prior art that cannot effectively remove steel pipe piles.

[0006] This utility model provides an underwater oxygen arc cutting mechanism, characterized in that it includes:

[0007] An oxygen supply assembly includes an oxygen cylinder and an oxygen pipeline, wherein the oxygen cylinder is located on water and a first end of the oxygen pipeline is connected to the oxygen cylinder;

[0008] The cutting assembly includes a cutting cabinet and a cutting component located underwater. The cutting cabinet is connected to the second end of the oxygen pipeline, and the cutting component is connected to the cutting cabinet. The cutting component and the workpiece to be cut have a preset cutting angle.

[0009] An arc-starting assembly includes a power supply and a power-off control unit located on water. The power supply is connected to the cutting cabinet via the power-off control unit, and the power supply is connected to the workpiece to be cut.

[0010] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the preset cutting angle is less than 60°.

[0011] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the cutting component includes:

[0012] tube body;

[0013] Several cutting wires are threaded through the tube body;

[0014] The coating is disposed on the outer surface of the tube.

[0015] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the cutting component further includes a waterproof layer covering the outer surface of the medicated coating.

[0016] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the tube body has a limiting part for positioning a plurality of cutting wires.

[0017] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein an adhesive layer is provided between the tube body and the coating.

[0018] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the cutting assembly further includes a guide member, which is positioned at the cutting position of the workpiece to be cut.

[0019] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the positive terminal of the power supply is connected to the workpiece to be cut, and the negative terminal of the power supply is connected to the cutting cabinet.

[0020] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the gas supply assembly further includes a pressure reducer, which is disposed between the first end of the oxygen pipeline and the oxygen cylinder.

[0021] According to the present invention, an underwater oxygen arc cutting mechanism is provided, wherein the power-off control component includes a power-off controller or a control switch.

[0022] The underwater oxygen arc cutting mechanism provided in this embodiment utilizes the high temperature generated by the underwater electric arc to cause oxygen to react with the workpiece to be cut, generating heat through a chemical reaction. This heats and melts the workpiece, and the force of the oxygen flow blows away the molten metal and oxidized slag in the cutting kerf, thus forming a kerf. Furthermore, there is a preset cutting angle between the cutting part and the workpiece to be cut, which effectively improves the cutting effect and facilitates the removal of the workpiece after cutting. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the underwater oxygen arc cutting mechanism provided by this utility model.

[0025] Figure 2 This is one of the structural schematic diagrams of the cutting component provided by this utility model.

[0026] Figure 3 This is the second structural schematic diagram of the cutting component provided by this utility model.

[0027] Figure 4 This is one of the structural schematic diagrams of the cutting component provided by this utility model.

[0028] Figure 5 This is the second structural schematic diagram of the cutting component provided by this utility model.

[0029] Figure label:

[0030] 110. Oxygen cylinder; 120. Oxygen tubing; 130. Pressure regulator;

[0031] 210. Cutting cabinet; 220. Cutting parts; 221. Tube body; 222. Cutting wire; 223. Coating; 224. Waterproof layer; 230. Guide component;

[0032] 310. Power supply; 320. Power-off control device; 330. Cable;

[0033] 400. Workpiece to be cut. Detailed Implementation

[0034] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0035] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0037] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] The following is combined Figures 1-5 This invention describes the underwater oxygen arc cutting mechanism.

[0040] An embodiment of this utility model proposes an underwater oxygen arc cutting mechanism, such as... Figure 1 As shown, the underwater oxygen arc cutting mechanism includes an air supply assembly, a cutting assembly, and an arc ignition assembly.

[0041] The gas supply assembly includes an oxygen cylinder 110 and an oxygen pipeline 120. The oxygen cylinder 110 is located on the water, and the first end of the oxygen pipeline 120 is connected to the oxygen cylinder 110.

[0042] The cutting assembly includes a cutting cabinet 210 and a cutting element 220 located underwater. The cutting cabinet 210 is connected to the second end of the oxygen pipeline 120, and the cutting element 220 is connected to the cutting cabinet 210. The cutting element 220 and the workpiece 400 to be cut have a preset cutting angle.

[0043] The arc ignition assembly includes a power supply 310 located on the water and a power-off control 320. The power supply 310 is connected to the cutting cabinet 210 via the power-off control 320, and the power supply 310 is also connected to the workpiece 400 to be cut. The function of the arc ignition assembly is to ignite an electric arc on the workpiece 220. After the workpiece 220 has stabilized and burned, the power-off control 320 is shut off, thereby disconnecting the power supply 310.

[0044] Understandably, one end of the power supply 310 is connected to the cutting cabinet 210 via the power-off control device 320, and the other end of the power supply 310 is connected to the workpiece 400 to be cut. At the same time, the cutting cabinet 210 is connected to the oxygen cylinder 110 via the oxygen pipeline 120, and oxygen is supplied to the cutting cabinet 210 through the oxygen cylinder 110. The power-off control device 320 is in the open state, and the end of the cutting piece 220 contacts the workpiece 400 to be cut, igniting an electric arc. After the electric arc has stabilized, the power-off control device 320 is in the closed state, and the underwater operator cuts the workpiece 400 by moving the cutting piece 220.

[0045] It should be noted that the oxygen cylinder 110 provides oxygen to the cutting cabinet 210 to maintain the continuous combustion of the cutting workpiece 220, and the force of the oxygen flow blows away the molten metal and oxidized slag in the cutting kerf, thereby removing the slag from the workpiece 400 to be cut, so as to form a kerf.

[0046] It is understandable that there is a preset cutting angle between the cutting part 220 and the workpiece 400 to be cut in order to improve the cutting effect.

[0047] The underwater oxygen arc cutting mechanism provided in this embodiment utilizes the high temperature generated by the underwater electric arc to cause oxygen to react with the workpiece 400 to generate heat, heating and melting the workpiece 400. The molten metal and oxidized slag in the cutting kerf are blown away by the force of the oxygen flow, thereby forming a kerf. The cutting part 220 and the workpiece 400 to be cut have a preset cutting angle, which effectively improves the cutting effect and facilitates the removal of the workpiece after cutting.

[0048] In one embodiment of this utility model, such as Figure 2 As shown, the preset cutting angle α between the cutting part 220 and the workpiece 400 to be cut is less than 60°. Optionally, the preset cutting angle α is less than or equal to 45°.

[0049] It is understandable that the workpiece 400 to be cut is a steel pipe pile. To improve the cutting effect, when cutting the steel pipe pile, especially in the initial arc-starting stage, the cutting angle α between the cutting part 220 and the workpiece 400 is equal to 45°. It should be noted here that the cutting angle α between the cutting part 220 and the workpiece 400 is the angle between the plane of the cutting part 220 and the tangent of the steel pipe pile.

[0050] According to the underwater oxygen arc cutting mechanism of this utility model, the arc ignition assembly also includes a copper arc ignition plate (not shown in the figure), which is disposed on the workpiece 400 to be cut, and the other end of the power supply 310 is connected to the copper arc ignition plate.

[0051] Understandably, the underwater cutting operator sends out oxygen by pressing the oxygen flow control valve on the cutting cabinet 210, and then contacts and moves the end of the cutting piece 220 to the copper arc ignition plate; ignites the electric arc, and after the electric arc has stabilized, shuts off the power-off control device 320; the underwater operator then moves the end of the cutting piece 220 to the workpiece 400 to be cut.

[0052] The underwater oxygen arc cutting mechanism provided in this embodiment utilizes the high temperature generated by the underwater electric arc to cause the oxygen to react with the workpiece 400 to generate heat, heating and melting the workpiece 400. The molten metal and oxidized slag in the cutting seam are blown away by the force of the oxygen flow. As the underwater electric arc moves continuously and oxygen is continuously supplied, the required cutting length is obtained, thus achieving the purpose of cutting the workpiece 400. Therefore, it has the characteristics of convenient and flexible operation, simple equipment, low cost, and can be widely used for underwater cutting in deep water.

[0053] In one embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the cutting component 220 includes a tube body 221, a coating 223, and a plurality of cutting wires 222. The plurality of cutting wires 222 are inserted inside the tube body 221, and the coating 223 is disposed on the outer surface of the tube body 221.

[0054] It is understandable that the cutting element 220 uses a drug-cored cutting strip. The cutting element 220 includes a tube body 221 and multiple cutting wires 222 disposed inside the tube body 221. The tube body 221 is coated with a drug-cored strip skin to form a drug coating 223 on the outer surface of the tube body 221.

[0055] When the flux coating 223 burns, it generates a large number of gas cannons, causing the cutting tube 221 to separate from the water. The burning rate of the flux coating 223 is slower than the melting rate of the tube 221, thus forming a sleeve structure at the end of the tube 221. It should be noted that underwater cutting is performed when the cutting electrode of the tube 221 can contact the workpiece. Before cutting, each cutting wire 222 is checked to ensure good contact.

[0056] In one embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the cutting component 220 also includes a waterproof layer 224 covering the outer surface of the drug coating 223.

[0057] Optionally, the waterproof layer 224 can be a waterproof paint applied to the outer surface of the coating 223 to prevent the coating 223 from absorbing water and getting damp. The coating 223 contains easily ionized components to stabilize the electric arc.

[0058] In one embodiment of the present invention, the tube body 221 has a limiting part inside for positioning a plurality of cutting wires 222.

[0059] It is understandable that the limiting part is a limiting block installed inside the tube body 221. The limiting block has several grooves that match the cutting wire 222 for limiting the installation of the cutting wire 222. The grooves in the limiting block are fitted with locking blocks, which engage with locking slots. The locking slots are opened on the cutting wire 222 to engage and limit the cutting wire, preventing it from being blown off by oxygen during use.

[0060] Furthermore, the tube body 221 is coated with an adhesive layer, and a coating 223 is provided on the outside of the adhesive layer. Thus, an adhesive layer is provided between the tube body 221 and the coating 223. After the cutting arc is ignited, there is no need to continue to supply power. The cutting part 220 continues to burn, and the arc heat is high, resulting in strong cutting penetration.

[0061] In one embodiment of this utility model, such as Figure 3 As shown, the cutting assembly also includes a guide 230, which is placed at the cutting position of the workpiece 400 to be cut. The guide 230 provides guidance for the movement of the cutting piece 220 to improve the accuracy of the cutting line.

[0062] Optionally, the guide 230 can be a guide hoop structure set in the cutting cabinet 210 and placed at the cutting position of the workpiece 400 to be cut, so as to ensure that the cutting line is accurate.

[0063] Furthermore, the guide member 230 is connected to the cutting cabinet 210, and the guide member 230 has an outer arc surface that matches the outer surface of the workpiece 400 to be cut. The guide member 230 can be placed on a portion of the circumferential surface of the workpiece 400 to be cut.

[0064] In one embodiment of this utility model, the positive terminal of the power supply 310 is connected to the workpiece 400 to be cut, and the negative terminal of the power supply 310 is connected to the cutting cabinet 210.

[0065] It is understood that this embodiment uses the DC positive connection method, with the cutting part 220 connected to the positive terminal of the power supply 310, and the workpiece 400 to be cut connected to the positive terminal of the power supply 310.

[0066] In one embodiment of this utility model, such as Figure 1 As shown, the gas supply assembly also includes a pressure reducer 130, which is located between the first end of the oxygen pipeline 120 and the oxygen cylinder 110.

[0067] Understandably, the output end of oxygen cylinder 110 is connected to pressure regulator 130, and oxygen pipeline 120 uses oxygen hose. One end of the oxygen hose is connected to pressure regulator 130, and the other end of the oxygen hose is connected to cutting cabinet 210. The pressure regulator 130 adjusts the outlet pressure of oxygen cylinder 110 to a safe and usable pressure level.

[0068] In one embodiment of this utility model, the power-off control component 320 includes a power-off controller or a control switch, wherein the control switch may be a one-way single-throw knife switch to realize the switching on and off of the power supply 310.

[0069] In one specific embodiment of this utility model, the assembly process of the underwater oxygen arc cutting mechanism is as follows:

[0070] Connect the pressure regulator 130 to the oxygen cylinder 110, and connect one end of the oxygen hose to the pressure regulator 130 and the other end of the oxygen hose to the cutting torch.

[0071] The cutting cable is connected to one pole of the power supply 310, and then connected to the cutting torch via the power-off control device 320. The other pole of the power supply 310 is directly connected to the workpiece 400 to be cut via the cutting cable. The cutting torch is connected to the cutting element 220.

[0072] The power supply 310, power-off control unit 320, oxygen cylinder 110 and pressure reducer 130 are placed on the surface facilities; part of the cutting cable and oxygen hose are above the water surface and the rest are underwater; the cutting cabinet 210 and cutting piece 220 are located underwater.

[0073] It should be noted that the workpiece 400 to be cut is an underwater steel pipe pile. The steel pipe pile is cut in sections. For example, the length of the steel pipe pile cut in a single cut shall not exceed 12m. That is, the cutting positions of the cutting part 220 for cutting the steel pipe pile in two steps should be arranged at intervals along the axial direction of the steel pipe pile, and the distance between the two cutting positions shall not exceed 12m.

[0074] The working process of the underwater oxygen arc cutting mechanism in this embodiment is as follows:

[0075] First, the preparatory work before cutting, connecting the various components of the mechanism; among them, the power-off control component 320 is in the disconnected state.

[0076] Next, underwater cutting is carried out. The cutting components and the workpiece 400 to be cut are underwater. The underwater cutting operator presses the oxygen flow control valve on the cutting cabinet 210 to supply oxygen. The shore staff opens the power cut-off control device 320, and brings the end of the cutting component 220 into contact with the workpiece 400 to be cut and moves it to ignite the electric arc. After the electric arc is stable, the shore staff disconnects the power cut-off control device 320. The underwater operator moves the end of the cutting component 220 to the cutting position of the workpiece 400 to be cut and performs the cutting.

[0077] Finally, after cutting, disassemble all components. It should be noted that after the workpiece is cut to 400mm, the cut section is lifted to ensure effective removal of the steel pipe pile.

[0078] It should be noted that in this embodiment, the oxygen is turned on first and then the arc is ignited, and the arc is turned off first and then the oxygen is turned off after the cutting is completed, in order to improve the cutting effect and avoid burning the cutting part 220.

[0079] It should be noted that working machinery is installed above the water surface to effectively remove the steel pipe piles. During the cutting process, the working machinery is connected to the steel pipe pile via steel wire ropes and must maintain a stressed state throughout the cutting process. After cutting, the cut steel pipe pile is lifted out of the water and onto a flatbed truck or transport barge. Tracked lifting equipment can be used as the working machinery.

[0080] The working principle of the underwater oxygen arc cutting mechanism in this embodiment is as follows: The high temperature and oxygen generated by the underwater electric arc react with the metal elements of the workpiece 400 to generate heat, heating and melting the workpiece 400. The molten metal and oxidized slag in the cutting kerf are blown away by the force of the oxygen flow, thereby forming a kerf. As the underwater electric arc moves continuously and oxygen is continuously supplied, the cutting element 220 continuously cuts the workpiece 400 to obtain the required cutting length, thereby achieving the purpose of cutting off the workpiece 400.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An underwater oxygen arc cutting mechanism, characterized in that, include: An oxygen supply assembly includes an oxygen cylinder and an oxygen pipeline, wherein the oxygen cylinder is located on water and a first end of the oxygen pipeline is connected to the oxygen cylinder; A cutting assembly includes a cutting cabinet and a cutting component located underwater. The cutting cabinet is connected to the second end of the oxygen pipeline, and the cutting component is connected to the cutting cabinet. The cutting component and the workpiece to be cut have a preset cutting angle. An arc-starting assembly includes a power supply and a power-off control unit located on water. The power supply is connected to the cutting cabinet via the power-off control unit, and the power supply is connected to the workpiece to be cut.

2. The underwater oxygen arc cutting mechanism according to claim 1, characterized in that, The preset cutting angle is less than 60°.

3. The underwater oxygen arc cutting mechanism according to claim 2, characterized in that, The cutting component includes: tube body; Several cutting wires are threaded through the tube body; The coating is disposed on the outer surface of the tube.

4. The underwater oxygen arc cutting mechanism according to claim 3, characterized in that, The cutting component also includes a waterproof layer covering the outer surface of the medicated coating.

5. The underwater oxygen arc cutting mechanism according to claim 3, characterized in that, The tube body has a limiting part inside for positioning several of the cutting wires.

6. The underwater oxygen arc cutting mechanism according to claim 3, characterized in that, An adhesive layer is provided between the tube body and the medicated coating.

7. The underwater oxygen arc cutting mechanism according to any one of claims 1 to 6, characterized in that, The cutting assembly also includes a guide member, which is positioned at the cutting location of the workpiece to be cut.

8. The underwater oxygen arc cutting mechanism according to any one of claims 1 to 6, characterized in that, The positive terminal of the power supply is connected to the workpiece to be cut, and the negative terminal of the power supply is connected to the cutting cabinet.

9. The underwater oxygen arc cutting mechanism according to claim 8, characterized in that, The gas supply assembly also includes a pressure reducer, which is disposed between the first end of the oxygen pipeline and the oxygen cylinder.

10. The underwater oxygen arc cutting mechanism according to any one of claims 1 to 6, characterized in that, The power-off control device includes a power-off controller or a control switch.

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