Underwater cable cutting device

Abstract

The utility model relates to an underwater cable cutting device which comprises a cable fixing seat, one side of the cable fixing seat is movably connected with a cable rotating pressing plate, and a cable is placed between the cable fixing seat and the cable rotating pressing plate. An eccentric blade is arranged in the cable fixing seat, and an end cover plate is arranged at the opening part of the top end of the cable fixing seat; the bottom of the cable fixing seat is sequentially connected with a waterproof motor, a waterproof battery and a water pressure sensing module. The device is suitable for being used in special scenes where cable constraint needs to be struggled in water, and is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical automation, in particular to an underwater cable cutting device. Background Art

[0002] Audio and video recording is widely used in many fields, such as dashcams, security surveillance, video cameras, and black boxes. When a ship sinks, the audio and video recording equipment installed on board often sinks with it. Even if the equipment itself has self-floating and mechanical escape capabilities, the cables connecting the equipment to each other and to the carrier platform are often difficult to sever. This can cause the equipment to be dragged along and sink with the ship, resulting in the equipment failing to float and losing valuable data. Therefore, an underwater cable cutter is required to sever the connecting cables when necessary to solve this problem. Utility Model Content

[0003] The purpose of the utility model is to provide an underwater cable cutting device which has its own battery and can be automatically started at a specified depth underwater to complete the cable cutting action.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The utility model provides an underwater cable cutting device, comprising a cable fixing seat, one side of the cable fixing seat is movably connected to a cable rotating pressure plate, and a cable is placed between the cable fixing seat and the cable rotating pressure plate; an eccentric blade is arranged in the cable fixing seat, and an end cover is arranged on the top port of the cable fixing seat; a waterproof motor, a waterproof battery and a water pressure sensing module are connected in sequence to the bottom of the cable fixing seat; the waterproof motor, the waterproof battery and the water pressure sensing module are electrically connected to each other; the waterproof motor comprises a motor shaft and a tool seat, and the motor shaft and the tool seat are coaxially connected; the eccentric blade is provided with a blade mounting hole and a safety pin hole, and the blade mounting hole is arranged on one side of the center of the eccentric blade; the eccentric blade is connected to the tool seat through the blade mounting hole; a through hole corresponding to the safety pin hole is provided on the end cover; and a safety pin is also included, and the safety pin passes through the through hole of the end cover and is inserted into the safety pin hole.

[0006] In the above-mentioned underwater cable cutting device, a marking strip is provided at the tail end of the safety pin.

[0007] In the above-mentioned underwater cable cutting device, the upper part of the cable is limited to the cable cutting position by the cable rotating pressure plate, and the lower part of the cable is tied and fixed to the outside of the housing of the waterproof motor or waterproof battery using cable ties or tape.

[0008] In the above-mentioned underwater cable cutting device, the blade mounting hole is a triangular stable mounting hole structure, and the blade is fastened to the tool holder through the three blade mounting holes on the eccentric blade.

[0009] In the above-mentioned underwater cable cutting device, the water pressure sensing module includes a piezoresistive water pressure sensor and a control module with a single-chip microcomputer as the core. The control module calculates the water depth according to the parameters of the water pressure sensor and controls the waterproof motor to start.

[0010] The beneficial effects of the utility model are:

[0011] This new utility model uses water depth pressure as a switch signal to trigger a low-speed, high-torque motor, which drives an eccentric blade to cut the cable. The cutter is typically tied to the target cable, and one cutter can cut three cables simultaneously, making it easy to use in special scenarios where cables need to be freed underwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structural principle of the utility model;

[0013] Figure 2 This is a schematic diagram of the utility model and the cable connection structure;

[0014] Figure 3 This is a schematic diagram of the installation structure of the eccentric tool of the utility model;

[0015] Figure 4 This is a schematic diagram of the eccentric tool structure of the utility model;

[0016] Figure 5 This is a structural diagram of the utility model when the safety pin holes are aligned and installed;

[0017] Figure 6 This is a schematic diagram of the structure of the tool lock pin of the utility model when it is in a safe locked state;

[0018] Figure 7 Schematic diagram of the cable cutting process with an eccentric blade;

[0019] In the picture:

[0020] 1 - Cable rotating pressure plate; 2 - Eccentric blade; 201 - Blade mounting hole; 202 - Safety pin hole; 3 - Safety pin; 4 - Waterproof motor; 401 - Motor shaft; 402 - Tool holder; 5 - Cable fixing seat; 6 - Waterproof battery; 7 - Water pressure sensor module; 8 - Cable; 9 - End cover. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] refer to Figures 1 to 6 The utility model relates to an underwater cable cutting device, including a cable fixing seat 5, one side of the cable fixing seat 5 is movably connected to a cable rotating pressure plate 1, and a cable is placed between the cable fixing seat 5 and the cable rotating pressure plate 1; an eccentric blade 2 is arranged in the cable fixing seat 5, and an end cover plate 9 is arranged on the top end of the cable fixing seat 5; the bottom of the cable fixing seat 5 is connected in sequence with a waterproof motor 4, a waterproof battery 6 and a water pressure sensing module 7; the waterproof motor 4, the waterproof battery 6, the water pressure sensing module 7 and the control circuit board are electrically connected; the waterproof motor 4 includes a motor shaft 401 and a tool seat 402, and the motor shaft 401 and the tool seat 402 are coaxially connected; the eccentric blade 2 is provided with a blade mounting hole 201 and a safety pin hole 202, and the blade mounting hole 201 is arranged on one side of the center of the eccentric blade 2; the eccentric blade 2 is connected to the tool seat 402 through the blade mounting hole 201; a through hole corresponding to the safety pin hole 202 is provided on the end cover plate 9; and it also includes a safety pin 3, which passes through the through hole of the end cover plate 9 and is inserted into the safety pin hole 202.

[0023] During installation, first open the cable rotating clamp 1, place the device cable 8 (which can be multiple cables) to be cut into the cable holder opening, tighten the cable rotating clamp 1, and lock it with bolts. Depending on the cable cutting requirements, the clamp is typically installed in a clamping position on the device cable. The upper portion of the cable is secured to the cutting position by the cable rotating clamp 1; the lower portion of the cable is secured to the exterior of the waterproof motor 4 or waterproof battery housing using a simple strapping method such as cable ties or tape.

[0024] like Figure 1 and Figure 3 As shown, the present invention has a water pressure sensing module 7 installed at the bottom tail. The water pressure sensing module 7 is powered by a waterproof battery 6. The water pressure sensing module 7 includes a water pressure sensor and a control module with a single-chip microcomputer as the core. Because its own power consumption (including the single-chip microcomputer) is extremely low, it can adapt to longer standby application scenarios. The water pressure sensor continuously measures the water depth data and transmits it to the single-chip microcomputer to calculate the current water depth. When the set water depth threshold is reached, the single-chip microcomputer controls the waterproof motor 4 to work, driving the eccentric blade 2 with low speed and high torque to complete the underwater cutting action. The starting cutting water depth threshold written in the single-chip microcomputer program can be adjusted to meet different water depth starting requirements.

[0025] like Figure 7 As shown, the maximum feed amount of the eccentric blade 2 during one rotation covers the minimum gap formed by the cable rotating pressure plate 1 and the cable 8 fixing seat, ensuring complete cutting of the entire cable cross section.

[0026] The water pressure sensor is a commercially available MEMS piezoresistive pressure sensor. When pressure is applied to the water pressure sensor, it deflects like a spring pad. This deflection creates tension in the piezoresistive element, which changes its resistance in proportion to the deflection. After calibration based on water depth and pressure, the sensor data is converted into water depth. The water pressure sensor is a small-range, high-resolution sensor with extremely low power consumption (0.6μA (standby power consumption <0.1μA at 25°C)). The sensor has a range of up to 0.2 MPa (2 bar), which translates to a water depth of approximately 20 meters. Because the sensor is an absolute pressure sensor, with an atmospheric pressure of approximately 0.1 Mbar, its maximum usable range is approximately 9-10 meters, which is sufficient for the operating depth range of underwater cutters. Data transmission uses I2C, with a water depth measurement resolution of up to 0.2 mbar (approximately a 2 mm change in water depth). The sensor can be integrated with most microcontrollers and MCU development boards, requiring only simple data conversion and no register modification or configuration. The structure is small and compact, and can be easily installed on the bottom of the underwater cable cutter through threads.

[0027] like Figure 3 and Figure 4 As shown, the blade mounting hole 201 adopts a triangular stable mounting hole structure design, and the blade is reliably connected and fastened to the tool holder 402 through the three blade mounting holes 201 on the eccentric blade 2. The tool holder 402 is coaxially installed with the waterproof motor shaft 401 and is locked by set screws around it.

[0028] After the waterproof motor 4 is started, the eccentric blade 2 rotates slowly around the motor shaft 401 as a whole. Due to the large torque, when the working surface of the blade encounters the equipment cable, it continuously squeezes in and cuts.

[0029] When blade safety pin hole 202 is aligned with end cover plate 9 through holes, cutter safety pin 3 can be loaded into to prevent misoperation. The tail end of safety pin 3 is provided with a marking strip, which has a reminder to pull out the safety pin before use.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An underwater cable cutting device, characterized in that: The invention comprises a cable fixing seat (5), wherein one side of the cable fixing seat (5) is movably connected to a cable rotating pressure plate (1), and a cable (8) is placed between the cable fixing seat (5) and the cable rotating pressure plate (1); an eccentric blade (2) is provided in the cable fixing seat (5), and an end cover plate (9) is provided at the top end of the cable fixing seat (5); a waterproof motor (4), a waterproof battery (6) and a water pressure sensing module (7) are connected to the bottom of the cable fixing seat (5) in sequence; the waterproof motor (4), the waterproof battery (6) and the water pressure sensing module (7) are electrically connected; The waterproof motor (4) comprises a motor shaft (401) and a tool seat (402), wherein the motor shaft (401) and the tool seat (402) are coaxially connected; the eccentric blade (2) is provided with a blade mounting hole (201), and the blade mounting hole (201) is arranged on one side of the center of the eccentric blade (2); and the eccentric blade (2) is connected to the tool seat (402) via the blade mounting hole (201).

2. The underwater cable cutting device according to claim 1, characterized in that: It also includes a safety pin (3); the eccentric blade (2) is provided with a safety pin hole (202), and the end cover (9) is provided with a through hole corresponding to the safety pin hole (202); the safety pin (3) passes through the through hole of the end cover (9) and is inserted into the safety pin hole (202).

3. The underwater cable cutting device according to claim 1, characterized in that: The tail end of the safety pin (3) is provided with a marking strip.

4. The underwater cable cutting device according to claim 1, characterized in that: The blade mounting hole (201) is a triangular stable mounting hole structure, and the blade is fixedly connected to the tool seat (402) through the three blade mounting holes (201) on the eccentric blade (2).

5. The underwater cable cutting device according to claim 1, characterized in that: The upper portion of the cable (8) is limited to a cable cutting position by the cable rotating pressing plate (1).

6. The underwater cable cutting device according to claim 1, characterized in that: The lower portion of the cable (8) is tied and fixed to the outside of the housing of the waterproof motor (4) or the waterproof battery (6) using a cable tie or adhesive tape.

7. The underwater cable cutting device according to claim 1, characterized in that: The water pressure sensing module (7) comprises a piezoresistive water pressure sensor and a control module with a single chip microcomputer as its core. The control module calculates the water depth according to the parameters of the water pressure sensor and controls the waterproof motor (4) to start.

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