Waterproof underwater cutting gun

Abstract

The utility model relates to a waterproof underwater cutting gun which comprises a cutting gun body, a threaded connector is fixedly installed at the end of the cutting gun body, a cavity is formed in the threaded connector, a clamping head is movably connected in the cavity, and the clamping head is fixedly connected with the cutting gun body. The end, located outside the cavity, of the clamping head is provided with a first inclined face inclining inwards, four annularly-distributed expansion joints are formed in the side wall of the clamping head, and when the cutting rod is installed, the locking nut is screwed outwards so that a second inclined face arranged on the inner wall of the locking nut can be disengaged from the first inclined face arranged on the connector. At the moment, the clamping head is not extruded by the second inclined face and can be opened along the expansion joint under the elastic force effect of the clamping head, then the user inserts the end of the cutting rod into the threaded connector and reversely rotates the locking nut, the first inclined face arranged on the clamping head is extruded through the second inclined face, and the clamping head shrinks along the expansion joint. The end part of the cutting rod can be clamped and fixed on the chuck, so that the operation is convenient, the clamping is stable, and the use by a user is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of underwater cutting equipment, specifically relating to a waterproof underwater cutting gun. Background Technology

[0002] Underwater cutting is a cutting method that uses a heat source to heat metal or burn it in pure oxygen to melt the metal, and then takes certain measures to remove the molten metal or slag to form a cut. Examples include underwater oxygen-flame cutting, underwater electric arc cutting, and underwater electric arc-oxygen cutting.

[0003] Existing underwater cutting guns generally use a cutting rod clamp to hold and fix the cutting rod. Due to the complex underwater environment, the cutting rod clamp is easily affected by external forces, causing the cutting rod to become unstable and fall off the cutting rod clamp, which is inconvenient for users. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof underwater cutting gun with a simple structure and reasonable design in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A waterproof underwater cutting gun includes a cutting gun body. A threaded connector is fixedly installed at the end of the cutting gun body. The threaded connector has a cavity inside, and a chuck is movably connected in the cavity. The end of the chuck located outside the cavity has an inwardly inclined first slope. Four annularly distributed expansion joints are formed on the side wall of the chuck. A locking nut is fitted on the outside of the chuck. The inner wall of the locking nut near the threaded connector has an internal thread adapted to the threaded connector. The inner wall of the locking nut away from the threaded connector has a second slope. An insulated flame-retardant handle is fixedly connected to the bottom of the cutting gun body. An air supply structure and an electrical supply structure are installed inside the insulated flame-retardant handle. An adjustment device for controlling the oxygen supply is also installed on the outer wall of the insulated flame-retardant handle.

[0007] As a further optimization of this utility model, the center of the end of the locking nut away from the cutting gun body is provided with a connecting hole for the cutting rod to pass through, and the periphery of the end of the locking nut away from the cutting gun body is provided with an anti-slip groove.

[0008] As a further optimization of this utility model, the power transmission structure includes a cable connector fixedly installed on the rear side of the bottom of the insulated flame-retardant handle. A cable is connected to the cable connector, and one end of the cable away from the cable connector passes through the insulated flame-retardant handle along the length direction of the insulated flame-retardant handle and is electrically connected to the conductive nozzle inside the cutting gun body.

[0009] As a further optimization of this utility model, the gas supply structure includes an oxygen pipe connector installed on the front side of the bottom end of the insulated flame-retardant handle. The insulated flame-retardant handle above the oxygen pipe connector has a through hole, and an oxygen hose is inserted through the through hole. The top end of the oxygen hose extends into the cavity opened by the threaded connector, and the bottom end of the oxygen hose is fixedly connected to the oxygen pipe connector.

[0010] As a further optimization of this utility model, the inner diameter of the through hole is larger than the diameter of the oxygen hose, and a high-temperature resistant, flame-retardant, and wear-resistant mesh tube is also fitted onto a section of the oxygen hose located in the inner cavity of the insulated flame-retardant handle.

[0011] As a further optimization of this utility model, the insulating flame-retardant handle has a sliding hole perpendicular to the through hole on the side near the locking nut. A spring is installed in the sliding hole, with one end of the spring fixed to the inner wall of the sliding hole. The adjusting device includes a sliding rod that can slide in the sliding hole and is fixedly connected to the other end of the spring. The end of the sliding rod away from the spring extends to the outside of the insulating flame-retardant handle. A through hole that is sleeved on the oxygen hose is vertically opened on the end of the sliding rod near the spring. A hand-operated valve switch is also rotatably connected to the bottom end of the insulating flame-retardant handle near the locking nut.

[0012] As a further optimization of this utility model, the adjustment device also includes a fine-tuning control switch rotatably connected to the outer wall of the end of the insulated flame-retardant handle near the body of the cutting gun. The end of the fine-tuning control switch passes through the insulated flame-retardant handle and the oxygen hose and extends into the interior of the oxygen hose. A ball valve is installed at the end of the fine-tuning control switch located inside the oxygen hose.

[0013] The beneficial effects of this utility model are as follows: When installing the cutting rod, the locking nut is screwed outward to disengage the second inclined surface on the inner wall of the locking nut from the first inclined surface on the connector. At this time, the chuck is not squeezed by the second inclined surface and can open along the expansion joint under its own elastic force. Then, the user inserts the end of the cutting rod into the threaded connector and rotates the locking nut in the opposite direction. The second inclined surface squeezes the first inclined surface on the chuck, causing the chuck to contract along the expansion joint, thus clamping and fixing the end of the cutting rod on the chuck. This is not only convenient to operate, but also provides stable clamping and is convenient for users. Attached Figure Description

[0014] Figure 1 This is an exploded view of the overall structure of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the chuck of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0017] Figure 4 This is a utility model Figure 3 Enlarged view of a partial detail at point A in the middle;

[0018] Figure 5 This is a schematic diagram of the installation structure of the oxygen hose of this utility model.

[0019] In the diagram: 1. Cutting gun body; 2. Threaded connector; 3. Clamp; 4. Expansion joint; 5. First bevel; 6. Locking nut; 7. Second bevel; 8. Insulated flame-retardant handle; 9. Cable connector; 10. Through hole; 11. Oxygen hose; 12. Oxygen pipe connector; 13. Spring; 14. Slide rod; 15. Through hole; 16. Hand-operated valve switch; 17. Fine-tuning control switch. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example

[0022] like Figure 1 - Figure 5 As shown, a waterproof underwater cutting gun includes a cutting gun body 1. A threaded connector 2 is fixedly installed at the end of the cutting gun body 1. The threaded connector 2 has a cavity inside, and a chuck 3 for clamping and fixing the cutting rod is movably connected in the cavity.

[0023] The chuck 3 is made of an elastic and high-temperature resistant metal material. The end of the chuck 3 located outside the cavity is provided with an inwardly inclined first slope 5. Four annular expansion joints 4 are provided on the side wall of the chuck 3. A locking nut 6 is fitted on the outside of the chuck 3. The inner wall of the end of the locking nut 6 near the threaded connector 2 is provided with an internal thread that is compatible with the threaded connector 2. The inner wall of the end of the locking nut 6 away from the threaded connector 2 is provided with a second slope 7. When the locking nut 6 is screwed onto the cutting gun body 1 through the threaded connector 2, as the locking nut 6 is tightened, the second slope 7 on the inner wall of the locking nut 6 can squeeze the first slope 5 at the end of the chuck 3, causing the side wall of the chuck 3 to contract along the expansion joints 4 until it fits against the outer wall of the cutting rod and clamps and fixes the cutting rod.

[0024] The locking nut 6 has a connecting hole at the center of the end away from the cutting gun body 1 for the cutting rod to pass through, so that the user can insert the end of the cutting rod through the connecting hole into the locking nut 6 and then insert it into the chuck 3. The locking nut 6 has an anti-slip groove on the periphery of the end away from the cutting gun body 1 to facilitate the user to screw the locking nut 6.

[0025] An insulated flame-retardant handle 8 is fixedly connected to the bottom of the cutting gun body 1. An air supply structure and an electrical supply structure are installed inside the insulated flame-retardant handle 8. The electrical supply structure includes a cable connector 9 fixedly installed on the rear side of the bottom of the insulated flame-retardant handle 8. A cable is connected to the cable connector 9. The end of the cable away from the cable connector 9 passes through the insulated flame-retardant handle 8 along the length direction and is electrically connected to the conductive nozzle inside the cutting gun body 1. When the cable connector 9 is connected to an external power source, current can be transmitted to the cutting rod through the conductive nozzle, causing the cutting rod to melt and perform underwater cutting.

[0026] The gas supply structure includes an oxygen pipe connector 12 installed on the front side of the bottom end of the insulated flame-retardant handle 8. The insulated flame-retardant handle 8 above the oxygen pipe connector 12 has a through hole 10, and an oxygen hose 11 is inserted through the through hole 10. An insulating sleeve is embedded in the oxygen hose 11 to isolate the current, so as to avoid the current from entering the external oxygen tank through the oxygen hose 11, thereby avoiding possible combustion or explosion accidents. The top end of the oxygen hose 11 extends into the cavity of the threaded connector 2, and the bottom end of the oxygen hose 11 is fixedly connected to the oxygen pipe connector 12. When cutting underwater, the oxygen pipe connector 12 can be connected to the external oxygen tank, and oxygen can be supplied to the internal cavity of the threaded connector 2 through the oxygen hose 11, so that the oxygen is sprayed out from the end of the cutting rod to assist combustion.

[0027] The inner diameter of the through hole 10 is larger than the diameter of the oxygen hose 11. A high-temperature resistant, flame-retardant and wear-resistant mesh tube is also fitted on a section of the oxygen hose 11 located in the inner cavity of the insulating flame-retardant handle 8. The inner diameter of the through hole 10 is set to be larger than the diameter of the oxygen hose 11 to accommodate the high-temperature resistant, flame-retardant and wear-resistant mesh tube. The high-temperature resistant, flame-retardant and wear-resistant mesh tube serves to insulate the cable line and protect the oxygen hose 11.

[0028] The insulating flame-retardant handle 8 has a sliding hole perpendicular to the through hole 10 on the side near the locking nut 6. A spring 13 is installed in the sliding hole, with one end of the spring 13 fixed to the inner wall of the sliding hole. An adjusting device for controlling the oxygen delivery is also installed on the outer wall of the insulating flame-retardant handle 8. The adjusting device includes a slide rod 14 that can slide in the sliding hole and is fixedly connected to the other end of the spring 13. The end of the slide rod 14 away from the spring 13 extends to the outside of the insulating flame-retardant handle 8. A through hole 15 that is sleeved on the oxygen hose 11 is vertically opened on the end of the slide rod 14 near the spring 13. A hand-operated valve switch 16 is also rotatably connected to the bottom end of the insulating flame-retardant handle 8 near the locking nut 6. When When the spring 13 is not under pressure, it pushes the slide rod 14 to slide outward along the insulating flame-retardant handle 8 of the sliding hole box under its own elastic force. At this time, the oxygen hose 11 is squeezed and deformed by the inner wall of the through hole 15 near the spring 13 and the inner wall of the through hole 10, so that oxygen cannot pass through. When the user presses the hand-operated valve switch 16 to squeeze the slide rod 14 to slide into the sliding hole a certain distance, the inner wall of the through hole 15 near the spring 13 separates from the outer wall of the oxygen hose 11. At this time, the oxygen hose 11 restores its deformation, and oxygen can be delivered to the cutting rod through the oxygen hose 11 for underwater cutting. At the same time, the user can control the force of pressing the hand-operated valve switch 16 to control the oxygen flow rate.

[0029] The adjustment device also includes a fine-tuning control switch 17 rotatably connected to the outer wall of the end of the insulated flame-retardant handle 8 near the main body 1 of the cutting gun. The end of the fine-tuning control switch 17 passes through the insulated flame-retardant handle 8 and the oxygen hose 11 and extends into the oxygen hose 11. A ball valve is installed at the end of the fine-tuning control switch 17 located inside the oxygen hose 11. At the same time, the user can rotate the fine-tuning control switch 17 to drive the ball valve to rotate inside the oxygen hose 11 and fine-tune the oxygen flow rate.

[0030] It should be noted that, when installing the cutting rod in this waterproof underwater cutting gun, the locking nut 6 is screwed outward along the threaded joint 2, causing the second inclined surface 7 on the inner wall of the locking nut 6 to disengage from the first inclined surface 5 on the chuck 3. At this time, the end of the chuck 3 located outside the threaded joint 2 is not squeezed by the second inclined surface 7 and can open along the expansion joint 4 under its own elastic force. At this time, the user can insert the end of the cutting rod into the threaded joint 2 through the connecting hole on the locking nut 6. Then, the user rotates the locking nut 6 in the opposite direction, and the second inclined surface 7 squeezes the first inclined surface 5 on the chuck 3, causing the chuck 3 to contract along the expansion joint 4, thus clamping and fixing the end of the cutting rod on the chuck 3. This is not only convenient to operate, but also provides stable clamping, avoiding the problem of unstable clamping and cutting rod detachment caused by external force in existing cutting rod fixing methods.

[0031] When cutting, the cable connector 9 can be connected to an external power source to supply power to the conductive nozzle of the cutting gun body 1. At the same time, the oxygen pipe connector 12 can be connected to an external oxygen tank, and oxygen can be supplied to the cutting rod through the oxygen hose 11. The cutting rod can be melted by oxygen combustion to carry out underwater cutting.

[0032] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A waterproof underwater cutting gun, comprising a cutting gun body (1), characterized in that: The cutting gun body (1) is fixedly installed with a threaded connector (2) at its end. The threaded connector (2) has a cavity inside, and a chuck (3) is movably connected in the cavity. The chuck (3) has an inwardly inclined first slope (5) at one end outside the cavity. The chuck (3) has four annularly distributed expansion joints (4) on its side wall. A locking nut (6) is fitted on the outside of the chuck (3). The inner wall of the locking nut (6) near the threaded connector (2) has an internal thread that matches the threaded connector (2). The inner wall of the locking nut (6) away from the threaded connector (2) has a second slope (7). An insulating flame-retardant handle (8) is fixedly connected to the bottom of the cutting gun body (1). The insulating flame-retardant handle (8) has a gas supply structure and a power supply structure inside. An adjustment device for controlling the oxygen supply is also installed on the outer wall of the insulating flame-retardant handle (8).

2. The waterproof underwater cutting gun according to claim 1, characterized in that: The locking nut (6) has a connecting hole at the center of the end away from the cutting gun body (1) for the cutting rod to pass through, and an anti-slip groove is provided on the periphery of the end away from the cutting gun body (1).

3. The waterproof underwater cutting gun according to claim 1, characterized in that: The power transmission structure includes a cable connector (9) fixedly installed on the rear side of the bottom of the insulating flame-retardant handle (8). A cable is connected to the cable connector (9). One end of the cable away from the cable connector (9) passes through the insulating flame-retardant handle (8) along the length direction and is electrically connected to the conductive nozzle inside the cutting gun body (1).

4. A waterproof underwater cutting gun according to claim 1, characterized in that: The gas supply structure includes an oxygen pipe connector (12) installed on the front side of the bottom end of the insulated flame-retardant handle (8). The insulated flame-retardant handle (8) above the oxygen pipe connector (12) has a through hole (10). An oxygen hose (11) is inserted through the through hole (10). The top end of the oxygen hose (11) extends into the cavity opened by the threaded connector (2). The bottom end of the oxygen hose (11) is fixedly connected to the oxygen pipe connector (12).

5. A waterproof underwater cutting gun according to claim 4, characterized in that: The inner diameter of the through hole (10) is larger than the diameter of the oxygen hose (11), and a high-temperature resistant, flame-retardant, and wear-resistant mesh tube is also fitted on a section of the oxygen hose (11) located in the inner cavity of the insulating flame-retardant handle (8).

6. A waterproof underwater cutting gun according to claim 5, characterized in that: The insulating flame-retardant handle (8) has a sliding hole perpendicular to the through hole (10) on the side near the locking nut (6). A spring (13) is installed in the sliding hole. One end of the spring (13) is fixed to the inner wall of the sliding hole. The adjustment device includes a slide rod (14) that can slide in the sliding hole and is fixedly connected to the other end of the spring (13). The end of the slide rod (14) away from the spring (13) extends to the outside of the insulating flame-retardant handle (8). A through hole (15) that is sleeved on the oxygen hose (11) is vertically opened on the end of the slide rod (14) near the spring (13). A hand-operated valve switch (16) is also rotatably connected to the bottom end of the insulating flame-retardant handle (8) near the locking nut (6).

7. A waterproof underwater cutting gun according to claim 6, characterized in that: The adjustment device also includes a fine-tuning control switch (17) rotatably connected to the outer wall of the end of the insulating flame-retardant handle (8) near the cutting gun body (1). The end of the fine-tuning control switch (17) passes through the insulating flame-retardant handle (8) and the oxygen hose (11) and extends into the interior of the oxygen hose (11). A ball valve is installed at the end of the fine-tuning control switch (17) located inside the oxygen hose (11).

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