An underwater cutting tool

Abstract

The utility model relates to underwater operation tool technical field discloses a kind of underwater cutting tools, including air pipe, connecting pipe and the ventilation mechanism of both connections. Its core is, ventilation mechanism includes the circular pipe of built-in sliding round bar, and the spring for making round bar automatic reset and the control assembly of driving round bar. By operating control assembly, it can make the air hole on round bar and the air hole on circular pipe alignment conduction or under the action of spring automatic misregistration close. Tool front end is equipped with conducting head, for fixed replaceable cutting electrode and connecting conducting pipe for power transmission. Integral structure outside is also coated with insulating sheath and insulating round cover, provide double safety protection. The utility model is through the gas control structure of pressing type, solved the inconvenient operation, slow response problem in prior art in valve, with convenient operation, safe and reliable, quick response beneficial effect.

Description

Technical Field

[0001] This utility model relates to the field of underwater operation tools, and in particular to an underwater cutting tool. Background Technology

[0002] In fields such as marine engineering, ship repair, bridge construction, and underwater rescue, cutting underwater metal structures is a frequent and critical task. Underwater oxygen arc cutting, as an efficient and mature technology, melts metal with an electric arc and then uses a high-pressure oxygen jet to burn and blow it away, and is widely used in such scenarios.

[0003] This type of cutting operation relies on a handheld underwater cutting tool, also known as a torch. The operator must hold the torch and precisely control the timing and flow rate of the oxygen injection while igniting the electric arc. In existing technology, the oxygen control valves of many underwater cutting tools have inherent inconveniences in their design. For example, some valves use a rotary handwheel or a separate wrench-type switch. If the operator needs to adjust or urgently shut off the airflow during cutting, they often need to interrupt the cutting action, or even use their other hand for assistance. This not only reduces the continuity and efficiency of the operation but also creates safety hazards in the rapidly changing underwater environment. In the event of backfire or an emergency, it is impossible to instantly cut off the oxygen supply.

[0004] Therefore, this utility model proposes an underwater cutting tool to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an underwater cutting tool, which aims to improve the problems of inconvenient operation, slow response, and low safety and reliability of oxygen control valves in some existing underwater cutting tools.

[0006] This utility model provides an underwater cutting tool, including: an air guide tube, a connecting tube; and an air ventilation mechanism connected between the air guide tube and the connecting tube.

[0007] The ventilation mechanism includes a circular tube, a circular rod slidably disposed inside the circular tube, a spring elastically disposed between the circular tube and the circular rod, and a control component connected to the circular rod.

[0008] Furthermore, the tube wall has vent holes, and the rod has corresponding ventilation holes. The control component is used to drive the rod to slide against the spring's return force. The sliding of the rod allows the ventilation holes to be selectively aligned and connected with the air holes, or to be automatically offset under the spring's return force, thereby achieving rapid control of the air passage opening and closing.

[0009] Preferably, the control component includes a handle that is pivotally connected to the tool body and drivenly connected to the round rod. This structure allows the operator to directly control the opening and closing of the valve by hand movements while holding the tool.

[0010] Furthermore, the ventilation mechanism also includes a ring fixed to the round rod. One end of the spring abuts against the ring, and the other end abuts against the fixing structure of the round tube, providing stable support for the spring and ensuring a smooth and reliable return process for the round rod.

[0011] Preferably, it also includes a conductive head, one end of which is fixedly connected to the end of the connecting tube, for guiding gas to the front end and serving as a key node for current conduction, thus forming an integrated pneumatic-electric actuator head.

[0012] In one specific implementation, the system also includes a cutting electrode and a locking bolt for locking the cutting electrode; the conductive head is provided with a socket for installing the cutting electrode, and the locking bolt passes through the threaded hole of the conductive head and abuts against the cutting electrode, so as to realize the quick clamping and replacement of the cutting electrode.

[0013] Preferably, it also includes a conductive tube and a fixing bolt; the conductive tube is fixedly connected to the conductive head by the fixing bolt, and is used to stably deliver the large current required for the cutting operation from an external power source to the conductive head.

[0014] In one specific implementation, the system also includes an insulating sleeve that covers the connecting pipe, the conductive head, and the outer periphery of the conductive pipe, for the purpose of isolating the internal live components from the external water environment as a whole, forming the main insulation protection.

[0015] Furthermore, it also includes the overall isolation of the external water environment to form the main insulation protection.

[0016] Furthermore, it also includes an insulating sleeve, which is fitted around the outer periphery of the connecting tube and located adjacent to the control component, providing additional safety redundancy in the area where the operator's hand is gripping the tube to prevent accidental leakage.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problems of inconvenient operation, slow response and lack of fault safety design of oxygen valves in the prior art by setting a push-type ventilation mechanism composed of a round tube, a built-in sliding round rod and a spring. It achieves the technical effect of accurately and quickly controlling the oxygen supply and stop when the hand is released, thereby greatly improving the convenience and safety of operation.

[0018] 2. This utility model solves the problems of cumbersome replacement of cutting electrodes and low reliability of electrical connections in the prior art by adopting a structure in which a conductive head is used in conjunction with a locking bolt to fix the cutting electrode and the conductive tube is connected by the fixing bolt. It achieves the technical effects of convenient and quick replacement of vulnerable parts, stable overall structure and stable current transmission.

[0019] 3. This utility model, by using an insulating sheath to completely wrap the core charged area and adding an insulating round sleeve to provide double protection for the area near the operator's hands, solves the problem that traditional tools with single insulation are easily damaged in complex underwater environments and have insufficient safety redundancy, thus achieving a technical effect that greatly improves the safety level of operators. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of an underwater cutting tool proposed in this utility model; Figure 2 This is a schematic diagram of the conductive tube structure of an underwater cutting tool proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the conductive head of an underwater cutting tool proposed in this utility model.

[0021] Legend: 1. Air duct; 2. Connecting tube; 3. Conductive head; 4. Ventilation mechanism; 41. Round tube; 42. Round rod; 43. Ventilation hole; 44. Ring; 45. Spring; 46. Control component; 461. Handle; 5. Conductive tube; 6. Fixing bolt; 7. Insulating round sleeve; 8. Locking bolt; 9. Cutting electrode; 10. Insulating sheath. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Reference Figures 1 to 4 This utility model provides an underwater cutting tool, which aims to solve the problems of complex oxygen control structure, inconvenient operation and slow safety response of existing underwater cutting tools.

[0024] Reference Figure 1The gas delivery path of the tool consists of a gas guide pipe 1, a connecting pipe 2, and a ventilation mechanism 4 connecting the gas guide pipe 1 and the connecting pipe 2. The gas guide pipe 1 is used to introduce external oxygen for cutting, the ventilation mechanism 4 is used to precisely control the gas flow, and the connecting pipe 2 is used to deliver the controlled gas to the cutting front end.

[0025] Reference Figure 2 and Figure 3 Specifically, it includes a circular tube 41, a circular rod 42, a spring 45, and a control component 46. The circular tube 41 has air holes on its wall. The circular rod 42 is slidably disposed inside the circular tube 41, and a corresponding air hole 43 is provided on the circular rod 42. The spring 45 is elastically disposed between the circular tube 41 and the circular rod 42, and is used to apply a constant restoring force to the circular rod 42. In its natural state, the air hole 43 of the circular rod 42 is offset from the air hole of the circular tube 41, thereby cutting off the air passage. The control component 46 is connected to the circular rod 42 and is used to drive the circular rod 42 to slide against the restoring force of the spring 45. When air supply is required, the control component 46 is operated, and the circular rod 42 slides to a specific position, aligning the air hole 43 with the air hole to form a connecting channel. When the control component 46 is released, the circular rod 42 automatically returns to its initial position under the restoring force of the spring 45, and the air passage is immediately closed.

[0026] Reference Figure 1 and Figure 4 The core of the component is the conductive head 3, which is hollow and conductive. One end of the conductive head 3 is fixedly connected to the end of the connecting tube 2, thereby guiding the airflow precisely controlled by the ventilation mechanism 4 to the front end of the tool without leakage. The conductive head 3 is provided with a socket for installing the cutting electrode 9, and a corresponding threaded hole is provided on the side wall of the conductive head 3.

[0027] To enable the installation and fixation of the cutting electrode 9, the assembly includes a locking bolt 8. During installation, the cutting electrode 9 is inserted into the socket of the conductive head 3, and then the locking bolt 8 is screwed into the threaded hole. The end of the locking bolt 8 is used to press against the cutting electrode 9, thereby achieving a secure and quick-release fixation. To provide the necessary high current for the cutting operation, the assembly also includes a conductive tube 5. The conductive tube 5 is fixedly connected to the conductive head 3 by a fixing bolt 6. This connection ensures both structural stability and low electrical impedance contact, thereby efficiently conducting the current supplied by the external cable to the cutting electrode 9.

[0028] Reference Figure 1 The control component 46 specifically includes a handle 461, which is pivotally connected to the tool body and forms a transmission connection with the rod 42. This design allows the operator to easily drive the rod 42 with simple finger movements in a natural grip posture, thereby achieving precise control of the gas valve.

[0029] Reference Figure 3 The ventilation mechanism 4 also includes a ring 44, which is fixed to the rod 42. One end of the spring 45 abuts against the ring 44, and the other end abuts against the fixed structure of the tube 41. The ring 44 provides a stable and vertical force-bearing surface for the spring 45, ensuring that the reset force can be smoothly transmitted to the rod 42 and avoiding movement jamming.

[0030] Reference Figure 1 The insulating sleeve 10 covers the outer periphery of the connecting pipe 2, the conductive head 3, and the conductive pipe 5, forming a large-area main insulating layer that completely isolates the internal high-voltage, high-current components from the external conductive water environment.

[0031] It also includes an insulating sleeve 7, which is fitted around the outer periphery of the connecting tube 2 and located adjacent to the control component 46. It provides an extra layer of insulation protection in the area most frequently touched by the operator's hands, and can effectively prevent current leakage from causing injury to the operator even if the main insulating sleeve 10 is accidentally damaged.

[0032] The implementation principle of this application embodiment is as follows: Before the cutting operation, the cutting electrode 9 is inserted into the socket of the conductive head 3 and locked with the locking bolt 8. The external power supply is connected through the conductive tube 5 and the external oxygen source is connected through the air duct 1. At this time, inside the ventilation mechanism 4, the elastic force of the spring 45 acts on the round rod 42, so that the air vent 43 of the round rod 42 and the air vent of the round tube 41 are misaligned, the air path is closed, and the entire tool is protected by the insulating sleeve 10 and the insulating round sleeve 7.

[0033] When cutting begins, the operator holds the tool, aligns the cutting electrode 9 with the workpiece to ignite the electric arc, and simultaneously grips the handle 461 of the control component 46. The handle 461 drives the round rod 42 to slide inside the round tube 41, overcoming the elastic force of the spring 45. When the round rod 42 slides to the predetermined position, the vent hole 43 on the round rod 42 aligns with the air hole in the round tube 41, forming a connected gas channel. High-pressure oxygen then flows from the gas guide pipe 1 through the round tube 41, the connecting pipe 2, and the conductive head 3, and finally exits from the front end of the cutting electrode 9, working in conjunction with the electric arc to cut the workpiece. When the handle 461 is released, the elastic force of the spring 45 immediately pushes the round rod 42 back to its original position, the vent hole 43 and the air hole are instantly misaligned, and the oxygen supply stops. This structure solves the problems of slow oxygen control response and inconvenient operation in the prior art.

Claims

1. An underwater cutting tool, comprising: Air tube (1); Connecting pipe (2); Ventilation mechanism (4), which is connected between the air guide pipe (1) and the connecting pipe (2), is used to control the flow of gas from the air guide pipe (1) to the connecting pipe (2); The ventilation mechanism (4) is characterized in that it comprises: A circular tube (41) has air holes on its wall; A round rod (42) is slidably disposed inside the round tube (41), and a vent hole (43) is provided on the round rod (42). A spring (45) is elastically disposed between the round tube (41) and the round rod (42) to apply a restoring force; A control component (46) is connected to the round rod (42) and is used to drive the round rod (42) to slide against the restoring force of the spring (45) so as to selectively align and connect the vent (43) with the air hole, or automatically offset them under the action of the restoring force of the spring (45).

2. The underwater cutting tool according to claim 1, characterized in that, The control component (46) includes a handle (461) which is pivotally connected to the tool body and is drively connected to the round rod (42) to facilitate the operator to apply force.

3. The underwater cutting tool according to claim 1, characterized in that, The ventilation mechanism (4) also includes a ring (44), which is fixed to the rod (42). One end of the spring (45) abuts against the ring (44), and the other end abuts against the fixing structure of the tube (41).

4. The underwater cutting tool according to claim 1, characterized in that, It also includes a conductive head (3), one end of which is fixedly connected to the end of the connecting tube (2) to form an extension of the gas channel and conduct current.

5. An underwater cutting tool according to claim 4, characterized in that, It also includes a cutting electrode (9) and a locking bolt (8) for locking the cutting electrode (9). The conductive head (3) is provided with a socket for installing the cutting electrode (9). The locking bolt (8) passes through the threaded hole of the conductive head (3) and abuts against the cutting electrode (9).

6. An underwater cutting tool according to claim 4, characterized in that, It also includes a conductive tube (5) and a fixing bolt (6), wherein the conductive tube (5) is fixedly connected to the conductive head (3) by the fixing bolt (6) and is used to deliver cutting current to the conductive head (3).

7. An underwater cutting tool according to claim 6, characterized in that, It also includes an insulating sleeve (10) that covers the outer periphery of the connecting tube (2), the conductive head (3) and the conductive tube (5) to provide main insulation protection.

8. An underwater cutting tool according to claim 1, characterized in that, It also includes an insulating sleeve (7), which is fitted around the outer periphery of the connecting pipe (2) and disposed adjacent to the control assembly (46) to provide auxiliary insulation.

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