Portable underwater hot cutting apparatus and method

Abstract

The application discloses a kind of portable underwater hot cutting equipment and method, including power supply device, base, shell, connector, ignition unit, nozzle and waterproof cover, the base is connected with shell and constitutes integrated structure, the connector is located inside base and is connected with external power supply device;The ignition assembly in the ignition unit, the diameter of first propellant and second propellant is sequentially increased setting, the first propellant is by gas-making agent, high-heat agent is added binder and is pressed into block by oil press and is constituted, the second propellant is by is by gas-making agent, high-heat agent, abrasive is added binder and is pressed into block by oil press and is constituted;The ignition assembly is connected with connector and is conducted, the nozzle is respectively connected with ignition unit and external communication, and high-temperature product generated by first propellant and second propellant is compressed by nozzle and becomes jet spray and is ejected by nozzle.This scheme is high in working efficiency and suitable for underwater, effectively overcome the problems existing in prior art.

Description

Technical Field

[0001] This invention relates to the field of mechanical manufacturing technology, specifically to a portable thermal cutting device and method for underwater applications. Background Technology

[0002] During the production and processing of products, strict standards are set for the length, width, and height of the products according to actual needs. Therefore, cutting machinery is used to process the products in a standardized manner. However, existing product cutting machinery generally cuts products directly with a cutting blade. Due to the varying hardness of the products, the blade may be damaged due to the greater hardness of the product. This requires replacing or repairing the blade, increasing costs and resulting in low cutting efficiency.

[0003] Therefore, to address the aforementioned issues, existing technologies have provided a thermal cutter. However, these thermal cutters require auxiliary heating elements to achieve thermal cutting, resulting in complex structures, large sizes, and inconvenience for portability. Furthermore, their cutting performance is low. Secondly, due to structural limitations, they cannot be used underwater, significantly restricting their application.

[0004] Therefore, it is evident that there is an urgent need to provide a cutter that is suitable for underwater use and has high efficiency, which is a problem that needs to be solved in this field. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a portable cutter for underwater thermal cutting, which has high working efficiency and is suitable for underwater use. On this basis, a thermal cutting method is also provided, which effectively overcomes the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides a portable underwater thermal cutting equipment, including a power supply device, a base, a housing, a connector, an ignition unit, a nozzle, and a waterproof cover. The base and the housing are connected to form an integral structure, and the connector is located inside the base and connected to the power supply device.

[0007] The ignition unit includes an ignition assembly, a first propellant column, and a second propellant column. The diameters of the ignition assembly, the first propellant column, and the second propellant column are arranged in ascending order. The first propellant column is formed by pressing together a gas-generating agent, a high-heat agent, and a binder. The second propellant column is formed by pressing together a gas-generating agent, a high-heat agent, and an abrasive with a binder.

[0008] The ignition assembly is connected to the connector. One end of the nozzle is connected to the ignition unit, and the other end is connected to the outside of the housing. The high-temperature products generated by the first and second propellant columns are compressed by the nozzle and ejected as a jet. The waterproof cover is connected to the nozzle to open or close the nozzle.

[0009] Furthermore, the ratio of gas-generating agent to high-heat agent in the first propellant column is 3 / 7 to 5 / 5.

[0010] Furthermore, the abrasive in the second propellant column accounts for 1-5% of the total weight of the second propellant column, and the proportion of gas-generating agent and high-temperature agent is 8 / 2-6 / 4.

[0011] Furthermore, a transition column is provided between the first propellant column and the ignition propellant. The transition column is formed by pressing together a gas-generating agent, a high-heat agent, and an ignition propellant with a binder.

[0012] Furthermore, the weight ratio of the ignition charge to the first propellant is 3 / 7 to 7 / 3.

[0013] Furthermore, a first sealing component is provided at the connection between the connector and the base.

[0014] Furthermore, the nozzle is located inside the housing and is fitted onto the ignition assembly. The nozzle has an injection channel inside, the diameter of which is smaller than that of the ignition assembly and is connected to the outside of the housing.

[0015] Furthermore, a second sealing assembly is provided at the connection between the injection pipe and the housing.

[0016] Furthermore, a V-shaped groove is provided on the top of the housing.

[0017] To achieve the above objectives, the present invention provides a cutting method for a portable underwater thermal cutting device, which ignites a propellant charge inside a sealed shell by conducting an electric current. The high-temperature products generated during the combustion process of the propellant charge are compressed by a small-diameter nozzle and ejected as a high-temperature, high-impact jet to cut off obstacles at the front end.

[0018] The portable underwater thermal cutting equipment provided by this invention cuts off obstacles at the front end through the dual action of high-temperature melting and impact cutting, and has high working efficiency and great effectiveness.

[0019] Secondly, the shell adopts a one-piece structure, which is easy to carry. At the same time, all interfaces adopt a sealed structure to ensure the sealing of the shell, making it suitable for underwater environments. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of this portable underwater thermal cutting equipment.

[0022] Figure 2 This is a schematic diagram of the shell structure of this portable underwater thermal cutting equipment;

[0023] Figure 3 This is a schematic diagram of the nozzle structure in this portable underwater thermal cutting equipment.

[0024] The following are the component labels in the attached diagram:

[0025] 1. Housing 1.1. Mounting slot 2. Base 3. Connector 4. First propellant 5. Second propellant 6. Transition propellant 7. Ignition head 8. Ignition powder 9. Heat insulation layer 10. Positioning sleeve 11. Nozzle 12. Waterproof cover Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0027] The portable underwater thermal cutting equipment provided in this solution is described in [reference]. Figure 1 It includes a base 2, a housing 1, a connector 3, an ignition unit, and a nozzle 9.

[0028] Furthermore, the housing 1 serves as the protective body for the entire cutter, with an internal cavity for housing the functional components of the cutter. The functional components of the cutter are built into the housing 1 and installed together to form an integrated cutter.

[0029] See Figure 2 The top of the housing 1 is provided with a mounting groove 1.1, preferably a V-shaped structure, for positioning the rod-shaped obstacle in close contact with the front of the nozzle, which can accurately cut the rod-shaped obstacle.

[0030] The base 2 is connected to the housing 1 to form an integrated structure, which can ensure the sealing of the entire structure. The interior of the base 2 is a cavity for installing the connector 3 and is connected to the cavity inside the housing 1 to realize the power connection to the functional components inside the housing 1.

[0031] The connector 3 is located on the base 2, and the base 2 is provided with a connection hole, which can be used to connect the connector 3 to an external power supply device. At the same time, the connector 3 is connected to the functional components inside the housing 1 through a lead wire. By plugging the connector 3 into the external power supply device, power can be supplied to the functional components inside the housing 1.

[0032] Here, a sealing component is preferably provided at the connection between the base 2 and the connector 3. The sealing component can ensure the airtightness of the device, making it well-suited for underwater use.

[0033] The ignition unit includes a propellant assembly and an ignition component. The ignition component is connected to the propellant assembly via connector 3 to ignite the propellant assembly for combustion.

[0034] The ignition assembly is located at one end near the nozzle 11 and is disposed on the propellant assembly. It is used to ignite the propellant assembly to release high-temperature products. The ignition assembly includes an ignition head 7 and an ignition charge 8.

[0035] The ignition head 7 is placed inside the ignition powder 8 and is used to ignite the ignition powder. The ignition head 7 is connected to the lead wire, which extends close to the side wall of the propellant assembly to the ignition head 7. The current in the lead wire triggers the ignition head 7 to ignite the ignition powder 8, which in turn ignites the propellant assembly, causing the propellant assembly to burn from top to bottom. The combustion produces high-temperature products, and at the same time, high pressure is generated in the cavity of the housing 1.

[0036] The ignition powder 8 is in a cone shape and is placed on the propellant assembly. It is in direct contact with the ignition head 7. The ignition powder 8 is preferably the most sensitive agent, so that the propellant can be quickly and reliably ignited by the sparks of the ignition head 7.

[0037] The composition of the ignition powder 8 is not limited in this scheme. For example, it can preferably be composed of an oxidant, a combustible agent and a binder, which is sensitive to thermal shock, has sufficient ignition capability and is reliable.

[0038] Furthermore, the drug cartridge assembly is located inside the housing 1, and it includes a first drug cartridge 4 and a second drug cartridge 5 respectively from top to bottom along the housing 1, with the first drug cartridge 4 and the second drug cartridge 5 connected together.

[0039] The first propellant charge 4 is used to heat the obstacle, causing it to melt and soften. The first propellant charge 4 is preferably composed of a gas-generating agent and a high-heat agent, and after adding a binder, it is pressed into a block by a hydraulic press. The diameter of the first propellant charge 4 is the same as the diameter of the large end of the conical ignition charge 8.

[0040] In this scheme, a gas-generating agent is preferably used in the first propellant column 4 because the gas-generating agent can produce a large amount of gas after reaction, but its heat release capacity is generally low. This can increase the pressure inside the cavity and thus enhance the injection force.

[0041] Secondly, high-temperature agents are preferred because they produce agents with extremely high temperatures but insufficient gaseous products after reaction, which can generate high-temperature products to ultimately melt the obstacles smoothly.

[0042] Furthermore, the preferred ratio of gas-generating agent and high-heat agent in the first propellant column 4 is 3 / 7 to 5 / 5. This ratio range ensures that the generated impact force is within the tolerance range of the cutter, but is also sufficient to blow away and melt obstacles, thus ensuring the safety of the operator and the reliability of the cutter.

[0043] For example, if the weight ratio of the gas-generating agent and the high-heat agent in the first drug column 4 is 3 / 7, then when the weight of the first drug column is 10g, the weight of the gas-generating agent is 3g and the weight of the high-heat agent is 7g.

[0044] This scheme does not limit the composition of the gas-generating agent and the high-heat agent. For example, the gas-generating agent can be starch, sawdust, etc., and the high-heat agent can be thermite, etc.

[0045] Furthermore, the second propellant 5 works in conjunction with the first propellant 4 to ensure the effectiveness of the ignition unit. The second propellant 5 is made by pressing a block of gas-generating agent, high-temperature agent, abrasive, and binder together with a hydraulic press. The diameter of the second propellant 5 is larger than that of the first propellant 4.

[0046] The gas-generating agent and the high-heat agent here have the same function as those in the first explosive column 4 mentioned above, so they will not be described in detail here; the abrasive is preferably a high-hardness ceramic powder that does not participate in the reaction, which can increase the scouring ability, accelerate the destruction of obstacles, and ensure the reliability of this cutter.

[0047] The weight of the abrasive accounts for 1-5% of the total weight of the second propellant. In the weight of the second propellant after removing the abrasive, the ratio of gas-generating agent to high-heat agent is 8 / 2 to 6 / 4. This ratio range allows the heat release of the second propellant 4 to be relatively low, but sufficient to keep the obstacle in a high-temperature state. The high impact force generated by the gas-generating agent and high-heat agent, combined with the abrasive, washes away the softened obstacle and accelerates the destruction of the obstacle.

[0048] For example, when the weight percentage of abrasive is 1%, the ratio of gas-generating agent to high-temperature agent is 8 / 2, and the weight of the second propellant column is 10g, then the weight of abrasive is 0.1g, the weight of gas-generating agent is 7.92g, and the proportion of high-temperature agent is 1.98g.

[0049] Furthermore, the ignition charge 8 has high sensitivity but low temperature, while the first charge 4 has high combustion temperature but low sensitivity and is not easy to ignite. Therefore, a transition charge 6 is provided between the ignition charge 8 and the first charge 4, and the diameter of the transition charge 6 is the same as that of the first charge 4.

[0050] The transition charge 6 is a transition layer connecting the ignition charge 8 and the first charge 4. The transition charge 6 is made by pressing the gas-generating agent, high-temperature agent and ignition charge into a block by a hydraulic press after adding a binder.

[0051] The preferred weight ratio of ignition charge 8 to first propellant charge 4 is 3 / 7 to 7 / 3. Transition propellant charge 6 within this ratio range can improve the ignition success rate and prevent ignition failure.

[0052] For example, when the weight ratio of ignition powder 8 to the first propellant 4 is 3 / 7, and the weight of the ignition powder is 30g, then the weight of the first propellant 4 is 70g.

[0053] As the propellant burns from top to bottom, the cavity in the combustion chamber continuously expands and the internal pressure decreases, causing the flame impact force to continuously decline. Therefore, the ignition unit in this design adopts a variable diameter design that is narrower at the top and wider at the bottom. This variable diameter design allows the number of propellants participating in the reaction simultaneously to continuously increase during combustion, partially overcoming the problem of the combustion chamber cavity expanding and the internal pressure decreasing.

[0054] Furthermore, this solution preferably sets a heat insulation layer 9 around the propellant assembly. The heat insulation layer 9 is preferably high-temperature resistant cement, which is cast from the bottom base 2 after the propellant assembly and nozzle 11 are assembled inside the shell 1. By setting the heat insulation layer 9, the high temperature after combustion can be concentrated to achieve the best high-pressure impact effect in the later stage. Secondly, it can insulate the propellant from the shell 1 and avoid the temperature from affecting the shell 1.

[0055] Furthermore, this solution also preferably sets a positioning sleeve 10 around the ignition unit to fix the position of the ignition unit, which facilitates installation.

[0056] Specifically, a positioning sleeve 10 is attached to the outer periphery of the conical structure formed by the first propellant 4, the transition propellant 6, and the ignition assembly. The positioning sleeve 10 can securely connect the first propellant 4, the transition propellant 6, and the ignition assembly. At the same time, it can also clamp and fix the lead wire attached to the side wall of the first propellant 4, and limit the ignition head 7 connected to it to be located inside the ignition charge 8, so as to ensure the reliability and stability during the ignition process.

[0057] Nozzle 11 is located inside housing 1 and sleeved on the propellant assembly, see [reference]. Figure 3 The nozzle 11 has an internal injection pipe with a diameter smaller than that of the propellant assembly and the ignition assembly. When the high-temperature products after the propellant combustion are compressed through the small-diameter injection pipe, they become a high-temperature, high-impact jet that cuts off obstacles at the front end.

[0058] Furthermore, this solution preferably includes a waterproof cover 12 at the spray pipe of the nozzle 11, which is fixed to the housing 1. The waterproof cover 12 can close the spray pipe when the device is not in operation, ensuring the sealing and waterproofness of the device.

[0059] The portable underwater thermal cutting equipment constructed by the above scheme is illustrated in the following example to show its working process in a specific application. It should be noted that the following working process is only an example and does not constitute a limitation on this scheme.

[0060] First, connect connector 3 of this device to the power supply device. After being powered by the power supply device, igniter 5 ignites ignition powder 6, which then burns through transition powder 6. Subsequently, the first powder 4 and the second powder 5 begin to burn from top to bottom. During the combustion of the first powder 4 and the second powder 5, high-temperature products are generated, and high pressure is generated inside the cavity.

[0061] After being compressed by the front nozzle 11, the high-temperature product becomes a high-temperature, high-impact jet that cuts off the front obstacle.

[0062] Based on the portable underwater thermal cutting equipment constructed by the above scheme, this scheme also provides a cutting method for the portable underwater thermal cutting equipment, which ignites the propellant by conducting current. The high-temperature products generated by the propellant during combustion are compressed by a small-diameter nozzle and ejected as a high-temperature, high-impact jet to cut off the obstacle at the front end.

[0063] The portable underwater thermal cutting equipment and method based on the above scheme cuts off obstacles at the front end through the dual action of high-temperature melting and impact cutting, and its working efficiency is high.

[0064] Secondly, the shell adopts a one-piece structure, which is easy to carry. At the same time, all interfaces adopt a sealed structure to ensure the sealing of the shell, making it suitable for underwater environments.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A portable underwater thermal cutting equipment, comprising a power supply device, characterized in that, It includes a base, a housing, a connector, an ignition unit, a nozzle, and a waterproof cover. The base and the housing are connected to form an integral structure, and the connector is located inside the base and connected to the power supply device. The ignition unit includes an ignition assembly, a first propellant grain, and a second propellant grain, wherein the diameters of the ignition assembly, the first propellant grain, and the second propellant grain increase sequentially. The first propellant column is formed by pressing a gas-generating agent and a high-temperature agent together with a binder. The second propellant column is formed by pressing a gas-generating agent, a high-temperature agent, and an abrasive together with a binder. The abrasive is a high-hardness ceramic powder that does not participate in the reaction. The weight of the abrasive accounts for 1 to 5% of the total weight of the second propellant column. In the weight of the second propellant column after removing the abrasive, the weight ratio of the gas-generating agent to the high-temperature agent is 8 / 2 to 6 / 4. The first and second propellant columns burn from top to bottom. First, the burning first propellant column heats the obstacle, causing it to melt and soften. Then, the burning second propellant column, through the high impact force generated by the gasifier and high-heat agent, combined with the abrasive, washes away the softened obstacle, accelerating its destruction. A heat insulation layer is provided around the propellant assembly consisting of a first propellant column and a second propellant column. The heat insulation layer is made of high-temperature resistant cement. After the propellant assembly and nozzle are assembled inside the shell, the high-temperature resistant cement is poured from the bottom base. The heat insulation layer formed on the one hand concentrates the high temperature after combustion, and on the other hand insulates the propellant column from the shell. The ignition assembly is connected to the connector. One end of the nozzle is connected to the ignition unit, and the other end is connected to the outside of the housing. The high-temperature products generated by the first and second propellant columns are compressed by the nozzle and ejected as a jet. The waterproof cover is connected to the nozzle to open or close the nozzle.

2. A portable underwater hot cutting apparatus according to claim 1, wherein The ratio of gas-generating agent to high-heat agent in the first propellant column is 3 / 7 to 5 / 5.

3. A portable underwater hot cutting apparatus according to claim 1, wherein A transition column is provided between the first propellant and the ignition propellant. The transition column is formed by pressing together a gas-generating agent, a high-heat agent, and an ignition propellant with a binder.

4. A portable underwater hot cutting apparatus according to claim 3, wherein The weight ratio of the ignition charge to the first propellant is 3 / 7 to 7 / 3.

5. A portable underwater hot cutting apparatus according to claim 1, wherein The connector and the base are provided with a first sealing component.

6. A portable underwater hot cutting apparatus according to claim 1, wherein The nozzle is located inside the housing and is fitted onto the ignition assembly. The nozzle has an injection channel inside, the diameter of which is smaller than that of the ignition assembly and is connected to the outside of the housing.

7. A portable underwater hot cutting apparatus according to claim 6, wherein A second sealing component is provided at the connection between the injection pipe and the housing.

8. A portable underwater hot cutting apparatus according to claim 1, wherein The top of the housing is provided with a V-shaped groove.

9. A cutting method of a portable underwater thermal cutting apparatus, characterized by, Based on the portable underwater thermal cutting equipment described in claims 1-8, it ignites the propellant in the sealed shell by conducting current. The high-temperature products generated during the combustion process are compressed by a small-diameter nozzle and ejected as a high-temperature, high-impact jet to cut off obstacles at the front end.

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