Hydraulically driven deep sea emergency cable cutting device

Abstract

The application discloses a kind of hydraulic drive's deep sea emergency cable cutting device, including workbench, first, second hydraulic cylinder, first, second knife storehouse, first, second cutter, one-way brake, limiting rod and oil pipe.Two hydraulic cylinders are oppositely installed in workbench, and the front end of piston rod is connected two cutters by thread and is equipped with double-nut anti-loose.The internal functional groove of knife storehouse is limited and guided piston rod, limiting rod, double-nut and cutter.Oil pipe is connected with knife storehouse, and pressure is adjusted according to water depth to keep internal and external pressure balance, prevent oil leakage and seawater intrusion;one-way brake opens with cutter extension, and knife storehouse is closed when not working.The front end of semicircular positioning structure of second cutter forms annular positioning space with first cutter.The cutting part of first cutter is trapezoidal bevel, and second cutter is equipped with matched trapezoidal groove and 7° blade edge.When first cutter is completely embedded in trapezoidal groove of second cutter and covers the circular hole of knife storehouse, cable is cut.The application is simple in structure, fast in response, sealed and corrosion-resistant, and suitable for emergency cutting.

Description

Technical Field

[0001] This invention belongs to the field of cutting technology, specifically a hydraulically driven deep-sea emergency cable cutting device. Background Technology

[0002] As various application fields become increasingly reliant on cables, the demand for emergency cutting of cables under extreme conditions is becoming more prominent, especially in scenarios such as marine engineering, industrial lifting, and ship operations, which place higher demands on the safety, reliability, and response speed of cutting devices.

[0003] In marine operations, the mother ship and underwater equipment are typically connected via composite umbilical cables. When these cables become snagged on seabed obstacles, the drag force can increase dramatically in a short period, threatening the structural safety of the mother ship and underwater equipment. In industrial lifting and emergency rescue scenarios, such as tower cranes or helicopter rescue winches, if a sudden anomaly occurs during heavy lifting and rescue operations, the supporting cable must be quickly cut to prevent equipment damage or personnel injury. In marine engineering, for example, in crude oil export systems, shuttle tankers and floating production storage and offloading (FPSO) units are usually connected by cables. When sea conditions deteriorate or environmental loads increase significantly, causing the cable tension to exceed the allowable stress of the winch and hull connection structure, the cable must be released or cut promptly to ensure the safety of the winch and hull structure.

[0004] However, existing cable cutting technologies still have certain limitations. Explosive cutting devices typically use explosives as a power source, posing safety risks during transportation, storage, and use, and are difficult to meet the application requirements of high-safety-level scenarios. Electric cutting devices have low cutting efficiency and cannot complete cutting operations in a timely manner in emergency situations. Single-blade cutting methods are prone to severe blade wear or incomplete cutting when dealing with high-strength composite cables, affecting cutting reliability. In addition, traditional wire cutters or hydraulic cutters are usually large in size and have complex operation procedures, making rapid deployment and response difficult in emergency situations.

[0005] To address the aforementioned technical problems, this invention proposes a hydraulically driven deep-sea emergency cable cutting device, aiming to improve the safety, cutting efficiency, and emergency response capabilities of the cable cutting process, so as to meet the practical application needs under complex working conditions. Summary of the Invention

[0006] To address the existing problems, this invention proposes a hydraulically driven deep-sea emergency cable cutting device.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A hydraulically driven deep-sea emergency cable cutting device includes a worktable, a first hydraulic cylinder, a first cutting tool, a first cutting tool magazine, a second cutting tool magazine, a second cutting tool, a second hydraulic cylinder, a one-way brake, a limit rod, and oil pipes, characterized in that:

[0009] The first hydraulic cylinder and the second hydraulic cylinder are respectively mounted on the worktable via mounting flanges at the bottom of their respective cylinder bodies, so that the two actuators are consistent in spatial layout and force state; the front ends of the first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the corresponding first tool magazine and second tool magazine via flanges.

[0010] Both the piston rods of the first and second hydraulic cylinders are provided with external thread structures at their front ends, and are directly engaged with the internal threads on the first and second cutting tools, respectively, so that the tools are directly installed on the piston rod ends; a double nut anti-loosening structure is provided at the threaded connection to prevent loosening under high load and rapid cutting conditions, thereby improving connection reliability and structural stability.

[0011] The first and second tool magazines are separate structures, connected to each other by bolts and fixedly mounted on the worktable by threads. Each of the first and second tool magazines has a semi-circular through hole on its opposite side. When assembled, they form a complete circular through hole. The axis of this through hole is coaxial with the axis of a circular hole on the bottom of the worktable, thus forming a through-hole structure for cable threading and positioning, thereby improving positioning accuracy and stability during the cutting process.

[0012] Both the first and second tool magazines have a rectangular block structure, with multiple functional slots integrated into their internal working surfaces for the installation, positioning, and guidance of multiple components. Specifically, these include: a circular slot in the center of the leftmost end for accommodating and axially positioning the piston rod; two smaller circular slots on either side for accommodating limiting rods to restrict the radial displacement of the piston rod; a large circular slot on the right for accommodating a double-nut structure, ensuring reliable positioning and anti-rotation constraint within the slot; and a square slot guide rail at the rightmost end for mounting the tool, limiting its posture and direction of movement to ensure stable movement along a predetermined direction during emergency cutting.

[0013] The oil pipe is installed on the side of the first tool chamber and communicates with the internal cavity of the first tool chamber. It is used to fill the tool chamber with hydraulic anti-rust oil to continuously protect the first tool from rust. Through the wetting and corrosion prevention effect of the hydraulic oil, the tool is kept in a stable medium environment in the standby state, thereby improving the reliability of the action during emergency response. The oil supply of the oil pipe has an automatic pressure regulation function, which can adjust the filling pressure in real time according to the seawater depth where the device is located, so as to maintain a dynamic balance between the oil pressure inside the tool chamber and the external water pressure. This prevents the hydraulic anti-rust oil from leaking out in the non-working state and prevents external seawater or impurities from entering the tool chamber, ensuring that the core actuator is always in a good protective state.

[0014] The first tool magazine is also equipped with a one-way gate. The one-way gate has an L-shaped structure and is fixedly installed inside the first tool magazine by a movable rod. It is used to seal the tool magazine and opens automatically when the tool is extended. This ensures that the first tool can freely enter and exit the tool magazine. The right-angled L-shaped structure also ensures that the tool is effectively isolated from the external environment when it is not in operation, thereby enhancing the overall corrosion resistance of the tool and the tool magazine.

[0015] The first and second cutting tools are driven by the first and second hydraulic cylinders respectively, and move in opposite directions inside the first and second tool chambers to perform emergency cutting operations.

[0016] The first cutting tool is sequentially configured with a cutting section, a transition section, and a connecting section along the axial direction. The cutting section, located at the front end of the first cutting tool, is used to cut the cable. It employs a trapezoidal oblique blade structure, forming a 30° cutting angle with a single-sided cutting edge, and a 25° oblique angle at the front end. Compared to a traditional straight-blade structure, this cutting section has a larger contact cutting area with the cable being cut, efficiently converting vertical force into backward cutting force, thus achieving rapid cutting of the cable. Simultaneously, the cutting section has a smaller thickness compared to the connecting section, allowing it to smoothly enter the trapezoidal groove of the second cutting tool during the cutting process, effectively cutting the cable. The transition section, located between the cutting section and the connecting section, has an arc-shaped structure, used to achieve a smooth transition between the two, reducing stress concentration caused by structural abrupt changes, thereby improving the overall strength and reliability of the first cutting tool under cutting loads. The connecting part is located at the rear end of the first tool and has a rectangular structure with a threaded groove and two circular grooves, which are used for connecting the piston rod of the hydraulic cylinder and welding the limiting rod, respectively. The connecting part also cooperates with the square groove guide rail set in the tool magazine to limit the posture and movement direction of the first tool, ensuring that it moves stably in a predetermined direction during the cutting process.

[0017] The front end of the second cutter is provided with a semi-circular positioning structure for contacting the cable. The center of the semi-circular positioning structure is collinear with the center line of the cutting edge of the first cutter. During emergency cutting, when the second cutter moves forward in a predetermined direction, the semi-circular positioning structure at its front end cooperates with the first cutter to form an annular positioning space, which confines the cable to the center position of the positioning space, so that the cable remains stably centered during the process.

[0018] The second cutter has a trapezoidal groove inside that mates with the first cutter. During emergency cutting operations, the first and second cutters move in opposite directions. As the cutting action progresses, the first cutter gradually embeds itself into the trapezoidal groove inside the second cutter. When the first cutter is fully embedded in the trapezoidal groove and covers the semi-circular positioning hole at the front end of the second cutter, the cutting stroke ends, achieving complete cutting of the cable. This ensures that the cable is fully severed during the cutting process, avoiding incomplete cutting or residual connections, and improving the reliability of emergency cutting operations.

[0019] The trapezoidal groove has a 7° cutting edge structure at a position corresponding to the back of the first cutter. This structure allows the second cutter to simultaneously perform auxiliary cutting operations on the cable. Specifically, during the cutting process, the cutting part of the first cutter and the cutting edge structure of the second cutter cooperate with each other to cut from both sides of the cable, forming a double-edged synergistic cutting effect. This effectively improves the integrity and cutting efficiency of the cable cut and reduces the cutting load on one side of the cutter.

[0020] The first and second cutting tools each have a circular groove at their tails for welding and fixing a limiting rod and a spring sleeved on the outer circumference of the limiting rod. The limiting rod cooperates with the guide groove in the tool magazine to provide radial constraint during the reciprocating motion of the cutting tool and prevent radial deflection. The spring is sleeved on the outside of the limiting rod, with one end abutting against the tail of the cutting tool. It provides a buffering effect during the retraction of the cutting tool and prevents rigid collision between the cutting tool and the inside of the tool magazine. This effectively protects the cutting tool during continuous cutting operations and extends the service life of the device.

[0021] The hydraulically driven deep-sea emergency cable cutting device of the present invention has the following advantages:

[0022] 1. In this invention, the hydraulic cylinder and both cutting tools are directly connected by threads, eliminating the intermediate connecting piece used in traditional structures to connect the piston rod and the cutting tools. This simplifies the overall structure, reduces the number of parts, and lowers assembly complexity. This direct connection method shortens the power transmission path, reduces transmission backlash and energy loss, and enables the cutting tools to quickly respond to hydraulic drive in emergency situations. This improves the timeliness and reliability of the cutting action, meeting the need for rapid cutting operations in emergency situations.

[0023] 2. In this invention, the internal working surface of the tool magazine integrates multiple sets of functional slots. The dimensions of each functional slot correspond to the piston rod, limiting rod, double nut structure, and cutting tool, respectively, for simultaneously limiting and positioning these components, thereby constraining their movement direction and relative position. Simultaneously, through the above structural design, it can be ensured that the piston rod, double nuts, and cutting tool move stably along a predetermined direction during the cutting operation, avoiding deviation or vibration, thus achieving reliable cable cutting in emergency situations.

[0024] 3. In this invention, the oil pipe is filled with hydraulic anti-rust oil in the inner wall cavity of the first tool chamber, providing continuous anti-rust protection for the first tool. The oil supply has an automatic pressure regulation function, which can adjust the filling pressure in real time according to the seawater depth, so as to maintain a dynamic balance between the oil pressure inside the tool chamber and the external water pressure, preventing hydraulic oil leakage and the intrusion of external seawater and impurities. At the same time, the first tool chamber is equipped with an L-shaped one-way gate, which opens automatically when the tool is extended, effectively isolating the inside of the tool chamber from the external environment when not in operation, significantly enhancing the sealing performance and corrosion resistance, ensuring that the core actuator is always well protected in the standby state, and improving the reliability of the action during emergency response.

[0025] 4. In this invention, the cutting part of the first tool adopts a trapezoidal oblique blade structure, forming a 30° cutting angle with a single-sided cutting method, and a 25° oblique angle at the front end. Compared with the traditional straight blade, this structure significantly increases the contact cutting area with the cable being cut, and can efficiently convert the vertical force into a backward cutting force, achieving rapid cutting of the cable. The smooth arc transition of the transition part reduces stress concentration and improves the overall strength and service life of the tool under cutting load. The trapezoidal groove of the second tool has a 7° cutting edge structure at a position corresponding to the back of the first tool. During the cutting process, the cutting part of the first tool and the cutting edge structure of the second tool cooperate with each other to cut from both sides of the cable, forming a double-blade synergistic cutting effect, effectively improving the integrity of the cable cut and the cutting efficiency, and reducing the cutting load of the single-sided tool.

[0026] 5. During emergency cutting operations, the first and second cutters move towards the center in opposite directions. As the cutting action progresses, the first cutter gradually embeds itself into the trapezoidal groove inside the second cutter. The trapezoidal structure of the second cutter matches the shape of the cutting section of the first cutter, ensuring that the upper and lower surfaces of the first cutter fit tightly against the corresponding inner wall of the second cutter during embedding, thus virtually eliminating gaps between the two cutters. This structural cooperation effectively prevents cable fibers or fine steel wires from embedding into the gaps between the cutters when cutting flexible cables such as nylon ropes and polypropylene ropes, or composite cables containing fine steel wires. This avoids incomplete cutting or cutting failure due to material jamming, thereby improving the continuity and reliability of the cutting process and ensuring the stable execution of emergency cutting operations.

[0027] 6. In this invention, the front end of the second cutter is provided with a semi-circular positioning structure for contacting the cable, characterized in that the center of the semi-circular positioning structure is on the same straight line as the center line of the cutting edge of the first cutter. When the second cutter advances forward in a predetermined direction, the semi-circular positioning structure and the first cutter cooperate to form an annular positioning space, thereby confining the cable at the center position of the positioning space. Through the adaptive positioning method of the above-mentioned semi-circular positioning structure, the cutting device can achieve rapid and stable positioning and cutting of cables of different diameters. At the same time, this structure eliminates additional clamping components, simplifies the device structure, and enables the device to quickly complete the cable cutting operation in emergency situations, improving the timeliness and reliability of emergency cutting. Attached Figure Description

[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram showing the connection and fit of the various components of the present invention.

[0030] Figure 2 This is a schematic diagram of the first blade chamber and the one-way gate of the present invention.

[0031] Figure 3 This is a schematic diagram of the second tool magazine of the present invention.

[0032] Figure 4 This is a schematic diagram of the first cutting tool of the present invention.

[0033] Figure 5 This is a schematic diagram of the second cutting tool of the present invention.

[0034] Figure 6 This is a schematic diagram of the cooperation between the first and second cutting tools of the present invention. Specific implementation methods

[0035] This embodiment describes a hydraulically driven deep-sea emergency cable cutting device.

[0036] Reference Figure 1 This hydraulically driven deep-sea emergency cable cutting device includes a worktable 1, a first hydraulic cylinder 2, a first cutting tool 3, a first cutting tool chamber 4, a second cutting tool 5, a second cutting tool chamber 6, a second hydraulic cylinder 7, a one-way gate 8, a limit rod 9, and an oil pipe 10.

[0037] Reference Figure 1The first hydraulic cylinder 2 and the second hydraulic cylinder 7 are mounted opposite each other on the worktable 1 via mounting flanges at the bottom of the cylinder bodies, and are respectively connected to the first tool magazine 3 and the second tool magazine 4 via front flanges. The piston rods of the first hydraulic cylinder 2 and the second hydraulic cylinder 7 are both provided with external thread structures at the front end. The external threads are directly engaged with the internal threads on the first tool 3 and the second tool 5, respectively. At the same time, the piston rods of the hydraulic cylinders and the tools are fixed with a double nut structure to prevent loosening.

[0038] The first cutting tool 3 and the tail 5 of the second cutting tool are respectively provided with circular grooves for welding and fixing the limiting rod 9 and the spring sleeved on the outer periphery of the limiting rod 9; the limiting rod cooperates with the guide groove opened in the tool magazine to provide radial constraint during the reciprocating motion of the cutting tool and prevent the cutting tool from radially deflecting; the spring is sleeved on the outside of the limiting rod, and one end of it abuts against the tail of the cutting tool to provide a buffering effect during the retraction of the cutting tool and prevent the cutting tool from rigidly colliding with the inside of the tool magazine.

[0039] The oil pipe 10 is connected to the internal cavity of the first tool chamber 4 and is used to fill the first tool chamber 4 with hydraulic anti-rust oil to continuously protect the first tool 5 from rust. Through the wetting and corrosion-preventing effect of the hydraulic oil, the tool is kept in a stable medium environment in the standby state, thereby improving the reliability of the operation during emergency response. The oil supply of the oil pipe 10 has an automatic pressure regulation function, which can adjust the filling pressure in real time according to the seawater depth where the device is located, so as to maintain a dynamic balance between the oil pressure inside the tool chamber and the external water pressure. This prevents the hydraulic anti-rust oil from leaking out in the non-working state and prevents external seawater or impurities from entering the tool chamber, ensuring that the core actuator is always in a good protective state.

[0040] The first tool magazine 4 and the second tool magazine 6 adopt a split structure, which is fixedly connected to each other by bolts and installed on the worktable by threads. The first tool magazine 4 and the second tool magazine 6 are respectively provided with semi-circular through holes on opposite sides. After the two tool magazines are fixedly connected, the above-mentioned semi-circular through holes are joined to form a circular through hole, the axis of which coincides with the axis of the circular hole at the bottom of the worktable, thereby forming a through hole structure between the tool magazine and the worktable 1 for cable threading and positioning.

[0041] Reference Figure 2 The L-shaped one-way gate 8 is fixedly installed inside the first tool chamber by a movable rod to seal the tool chamber. It opens automatically when the tool is extended, which not only ensures that the first tool can freely enter and exit the tool chamber, but also effectively isolates the inside of the tool chamber from the external environment when not in operation, thereby enhancing the sealing performance and corrosion resistance of the tool chamber.

[0042] Reference Figure 3The second tool magazine 6 has a rectangular block structure with multiple functional slots integrated into its internal working surface for the installation, limiting, and guiding of multiple components. Specifically, these include: a circular slot in the center of the leftmost end for accommodating and axially positioning the piston rod; two smaller circular slots on either side for accommodating limiting rods to restrict radial displacement of the piston rod; a large circular slot on the right for accommodating a double-nut structure, ensuring reliable positioning and anti-rotation constraint within the slot; and a square slot guide rail at the rightmost end for mounting the tool, limiting its posture and direction of movement to ensure stable movement along a predetermined direction during emergency cutting. Both the first and second tool magazines undergo heat treatment processes such as quenching and tempering to strengthen their surface strength, increasing component reliability during cable cutting operations.

[0043] Reference Figure 4 The first cutting tool 3 comprises, along its axial direction, a cutting section, a transition section, and a connecting section. The cutting section has a symmetrical trapezoidal oblique blade structure, forming a 30° cutting angle with a single-sided cutting edge, and a 25° oblique angle at the front end; the transition section has an arc-shaped structure; the connecting section has a rectangular block structure with a threaded groove at the end for connecting with the piston rod of the first hydraulic cylinder 2. Circular grooves on both sides of the threaded groove are used for welding a limiting rod, which cooperates with the square groove guide rail in the first tool magazine 4 to limit the direction of movement. The first cutting tool 3 is made of YG18 cemented carbide material and undergoes heat treatment such as quenching and tempering, and the tool surface is treated with ceramic glazing.

[0044] Reference Figure 5 The second cutter 5 has a semi-circular positioning structure at its front end for contacting the cable. The center of this semi-circular positioning structure is collinear with the center line of the cutting edge of the first cutter 3. During emergency cutting, as the second cutter advances in a predetermined direction, its semi-circular positioning structure cooperates with the first cutter to form an annular positioning space, thereby confining the cable to the center of this space and ensuring the cable remains stably centered during cutting.

[0045] Reference Figure 5 and Figure 6 The second cutter 5 has a trapezoidal groove inside that cooperates with the first cutter 3. The trapezoidal groove has a 7° cutting edge structure at a position corresponding to the back of the first cutter. During emergency cutting operations, the cutting part of the first cutter 5 and the cutting edge structure of the second cutter 3 cooperate with each other to cut from both sides of the cable, forming a double-edged synergistic cutting effect, which effectively improves the integrity of the cable cut and the cutting efficiency, and reduces the cutting load of the single-sided cutter.

[0046] The detailed plan is as follows: During emergency cutting operations, the cable is positioned within the through-hole structure formed between the first cutter chamber 4, the second cutter chamber 6, and the worktable 1. The first hydraulic cylinder 2 and the second hydraulic cylinder 7 drive the first cutter 3 and the second cutter 5 to move in opposite directions. The first cutter pushes open the one-way brake, and the cable contacts the two cutters, being pushed into the semi-circular positioning structure at the front end of the second cutter 5. The semi-circular positioning groove cooperates with the first cutter 3 to form an annular positioning space, fixing the cable at the center of this space. Simultaneously, the cutting part of the first cutter 5 and the cutting edge structure of the second cutter 3 cooperate to cut the cable from both sides. When the first cutter 3 is fully embedded in the trapezoidal groove of the second cutter 5, and the first cutter 3 and the second cutter 5 completely cover the circular through-hole in the cutter housing, it ensures that the cable is fully cut during the cutting process, avoiding incomplete cutting or residual connections, thus completing the entire cutting process.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulically driven deep-sea emergency cable cutting device, comprising a worktable, a first hydraulic cylinder, a first cutting tool, a first cutting tool magazine, a second cutting tool magazine, a second cutting tool, a second hydraulic cylinder, a one-way brake, a limit rod, and oil pipes, characterized in that: The first hydraulic cylinder and the second hydraulic cylinder are mounted opposite each other on the worktable via mounting flanges located at the bottom of their respective cylinder bodies, and the first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the first tool magazine and the second tool magazine via their front flanges. The piston rods of the first hydraulic cylinder and the second hydraulic cylinder are both provided with external thread structures at their front ends, which directly mesh with the internal threads provided on the first and second cutting tools respectively, so that the first and second cutting tools are directly installed on the corresponding piston rod ends. Furthermore, the threaded connection between the piston rod and the corresponding cutting tool is provided with a double nut anti-loosening structure to prevent loosening under high load or rapid cutting conditions. The first tool magazine and the second tool magazine adopt a split structure. After they are fixedly connected to each other, they form a through hole with the round hole in the middle of the worktable for cable to pass through. This through hole is used to position the cable. The first and second cutters are driven by the first and second hydraulic cylinders respectively, and move in opposite directions within the first and second cutter chambers to cut the cable. The oil pipe is installed in the circular groove on the side of the first tool magazine and communicates with the internal cavity of the tool magazine, and is used to fill the tool magazine with hydraulic anti-rust oil. The first tool magazine is equipped with the one-way gate, which is used to close the tool magazine when it is not in operation and to open it when the tool is extended. The front end of the second cutter is provided with a semi-circular positioning structure. The center of the structure is collinear with the center line of the cutting edge of the first cutter. During the cutting process, the semi-circular positioning structure cooperates with the first cutter to form an annular positioning space to confine the cable within the annular positioning space. The second cutter has a trapezoidal groove inside that cooperates with the first cutter. During the cutting process, the first cutter gradually embeds itself into the trapezoidal groove and completes the cutting of the cable. The tail portions of the first and second cutting tools are respectively provided with mounting grooves for limiting rods. The limiting rods are set in the tool magazine functional slots to provide radial constraints during tool movement.

2. The cutting device for emergency cable cutting according to claim 1, characterized in that: The oil supply system has an automatic pressure regulation function, which can adjust the oil filling pressure in real time according to the seawater depth where the device is located, so as to maintain a dynamic balance between the oil pressure inside the tool chamber and the external water pressure, thereby preventing the leakage of hydraulic anti-rust oil and preventing external seawater or impurities from entering the tool chamber.

3. The cutting device for emergency cable cutting according to claim 1, characterized in that: The one-way gate has an L-shaped structure and is fixedly installed inside the first tool magazine by a movable rod. It is used to effectively isolate the inside of the tool magazine from the external environment when not in operation, and opens automatically when the tool is extended to ensure that the first tool can freely enter and exit the tool magazine.

4. The cutting device for emergency cable cutting according to claim 1, characterized in that: Both the first and second tool magazines are rectangular block structures, with multiple sets of functional slots integrated into their internal working surfaces for the installation, limiting, and guiding of hydraulic cylinder piston rods, double nut structures, and cutting tools.

5. The cutting device for emergency cable cutting according to claim 4, characterized in that: The multiple sets of functional slots include: The circular groove at the center of the far left end is used to accommodate the piston rod and position it axially; Two small circular grooves located on both sides of the circular through hole are used to accommodate the limiting rod to limit the radial displacement of the tool; The large circular groove on the right is used to accommodate the double nut structure, so as to achieve reliable positioning and anti-rotation constraint within the groove; And the rightmost square groove guide rail is used to mount the cutting tool and limit the tool's posture and direction of movement, thereby ensuring that the tool moves stably in a predetermined direction during emergency cutting.

6. The cutting device for emergency cable cutting according to claim 1, characterized in that: The first cutting tool is sequentially configured with a cutting section, a transition section, and a connecting section along the axial direction; The cutting section is located at the front end of the first tool and is used to cut the cable. It adopts a trapezoidal oblique blade structure, forming a 30° blade angle with a single-sided cutting method, and the front end has a 25° oblique angle. The cutting section has a smaller thickness dimension than the connecting section, so that it can smoothly enter the trapezoidal groove of the second tool during the cutting process. The transition section is located between the cutting section and the connecting section, and has an arc-shaped structure to achieve a smooth transition between the two, thereby reducing stress concentration caused by structural abrupt changes. The connecting part is located at the rear end of the first tool and is a rectangular block structure with a threaded hole at the end, used to connect with the piston rod of the hydraulic cylinder; the connecting part also cooperates with the square groove provided in the tool magazine to limit the posture and movement direction of the first tool.

7. The cutting device for emergency cable cutting according to claim 1, characterized in that: The trapezoidal groove of the second cutter has a 7° cutting edge structure at a position corresponding to the back of the first cutter. This cutting edge structure enables the second cutter to perform auxiliary cutting operations on the cable simultaneously. During the cutting process, the cutting part of the first cutter and the cutting edge structure of the second cutter cooperate with each other to cut from both sides of the cable, forming a double-edged synergistic cutting effect.

8. The cutting device for emergency cable cutting according to claim 1, characterized in that: The tail portions of the first and second cutting tools are respectively provided with circular grooves for welding and fixing the limiting rod and the spring sleeved on the outer periphery of the rod; the limiting rod cooperates with the guide through hole opened in the tool magazine to provide radial constraint during the reciprocating motion of the tool and prevent the tool from radially deflecting; the spring is sleeved on the outside of the limiting rod, with one end abutting against the tail of the tool, to provide a buffering effect during the retraction of the tool and prevent the tool from rigidly colliding with the inside of the tool magazine.

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