Energy-gathered cutting device and application

Abstract

An energy-gathered cutting device comprises energy-gathered cutting pieces, the energy-gathered cutting device is of a flexible chain structure formed by connecting the multiple energy-gathered cutting pieces in series through flexible connecting pipes, and the section of each energy-gathered cutting piece is polygonal. Each outer surface, used for being attached to a cut object, of the energy-gathered cutting piece is provided with an energy-gathered groove in the length direction of the energy-gathered cutting piece. The flexible chain structure can be bent and wound on the surface of a cut object. According to the design, the limitation of a traditional integrated rigid device is broken through, the whole device can be flexibly bent and wound according to the polygonal section, the cylindrical surface and other complex contours of the power transmission tower cross arm, tight attachment can be achieved without an additional fixing mechanism, and the problems that an existing rigid device cannot adapt to the complex component contours and is difficult to arrange are thoroughly solved; and the laying efficiency of high-altitude operation is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of blasting technology, specifically to a shaped charge cutting device and its application. Background Technology

[0002] In urban renewal and power grid upgrade projects, the dismantling of steel crossarms on transmission towers places stringent demands on the adaptability, deployment flexibility, and cutting reliability of cutting devices. As high-altitude load-bearing components, crossarms often have polygonal cross-sections (such as combinations of angle steel and channel steel) and diverse length specifications, requiring cutting devices to closely conform to their contours and achieve efficient cutting.

[0003] Existing energy-concentrating cutting devices are mostly one-piece rigid structures, without adopting a series design of multiple cutting components, which cannot form a flexible chain shape. As a result, the device cannot bend and wrap around the surface of the crossarm, and can only be fixed by bolts or manually attached. The adaptability is extremely poor, especially in dealing with the complex contours of polygonal crossarms. The cutting length of a single device is fixed and cannot be flexibly adjusted according to the actual cutting length of the crossarm, resulting in discontinuous cutting coverage, requiring multiple deployments, and low work efficiency.

[0004] Furthermore, traditional rigid cutting devices, unable to form flexible structures, not only require personnel to adjust their positions closely during deployment, increasing the risks of working at heights, but also are prone to jet dispersion due to loose fit, resulting in unstable cutting effects. Therefore, the industry urgently needs to solve the core problems of poor adaptability, difficult deployment, and insufficient cutting reliability of existing devices to meet the high-efficiency cutting requirements of polygonal components such as transmission tower crossarms. Summary of the Invention

[0005] The purpose of this invention is to solve the core problems of poor adaptability, difficult deployment, and insufficient cutting reliability of existing devices, and to propose a focused energy cutting device.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A focused cutting device is provided, wherein a plurality of focused cutting components are connected in series by a flexible connecting pipe to form a flexible chain structure. The cross-section of the focused cutting component is polygonal, and each outer surface of the focused cutting component for adhering to the object being cut has a focused groove along its length.

[0008] The flexible chain structure can be bent and wrapped around the surface of the object being cut. This design breaks through the limitations of traditional integrated rigid devices, allowing the entire device to be flexibly bent and wrapped according to the complex contours of the transmission tower crossarm, such as polygonal cross-sections and cylindrical surfaces. It can achieve a tight fit without additional fixing mechanisms, completely solving the problem that existing rigid devices cannot adapt to complex component contours and are difficult to deploy, thus greatly improving the deployment efficiency of high-altitude operations.

[0009] The cross-section of the energy-concentrating cutting component is preferably square. The energy-concentrating groove is equipped with an energy-concentrating charge and a shaped charge shroud. It is made of high-strength, lightweight metal, such as copper or aluminum. Its square cross-section and multi-faceted energy-concentrating charge design ensure that after the device is wound and fixed, regardless of the shape of the cross-section of the crossarm, there is always more than one energy-concentrating jet surface that can face the cutting target, thus achieving efficient cutting.

[0010] The polygonal cross-section ensures that after the device is wrapped around the crossbeam, at least one of the energy-concentrating grooves is always aligned with the cutting target, eliminating the need for precise manual alignment and effectively avoiding cutting failures caused by alignment errors in high-altitude environments. The multi-faceted energy-concentrating groove design allows each cutting component to form a multi-directional energy-concentrating jet. Even if there is a deviation in the device's fitting angle, energy can still be gathered through the corresponding energy-concentrating grooves, ensuring stable cutting results and solving the drawback of existing single-sided energy-concentrating groove devices that require excessively high fitting precision.

[0011] As a further aspect of the present invention: the energy-concentrating trough is triangular in shape and has an opening angle of α.

[0012] As a further aspect of the present invention: α equals 60–90°.

[0013] The preferred value of α is 70 to 80° to balance the intensity of the focused jet and the cutting coverage.

[0014] As a further aspect of the present invention: each outer surface of the energy-concentrating cutting component for adhering to the object being cut is provided with an adsorption element, the adsorption element being used to adsorb onto the object being cut.

[0015] As a further aspect of the present invention: the adsorption element is a magnet, and the adsorption element is used to adsorb onto the metal crossarm.

[0016] The magnet is a high-strength permanent magnet, ensuring that the device can be stably attracted to the steel surface after being wound around the crossarm, and maintain the predetermined position before detonation.

[0017] As a further aspect of the present invention: the energy-concentrating cutting components are connected in series via flexible connecting pipes.

[0018] The flexible connecting tube is a compressible hose, with its two ends fixedly connected to adjacent energy-concentrating cutting components, so that the flexible chain-like structure can be bent and wrapped around the surface of the object being cut.

[0019] As a further aspect of the present invention: a hole is provided through the energy-conducting cutting component along its length direction, the hole is connected to the connecting pipe, and an initiator is sequentially inserted through the hole and the connecting pipe.

[0020] The hole is coaxially arranged with the flexible connecting pipe, and the detonator is a continuous structure to ensure that all shaped charge cutting parts are detonated synchronously.

[0021] As a further aspect of the present invention: the detonating element is a detonating cord, and the end of the detonating cord is provided with a detonator, which may be a detonator.

[0022] The detonator is a wireless detonator to avoid conflicts between the markings and the detonating element; the wireless detonator can receive encrypted wireless detonation signals from the ground and is installed at least at one end of the detonating cord to activate the detonating index and detonate all shaped charge.

[0023] As a further aspect of the present invention, the energy-concentrating cutting device further includes a suspension member, which is disposed on the energy-concentrating cutting member.

[0024] The suspension component is a hook or a hanging ring, specifically located at the end of a flexible chain structure, used to cooperate with the electromagnetic release suspension mechanism of the UAV to realize the aerial mounting and deployment of the device.

[0025] A method for applying the energy-concentrating cutting device involves assembling the energy-concentrating cutting device on an aircraft for performing cutting operations.

[0026] Supplement: The aircraft is a drone, and the application method specifically includes the following steps: Step 1: Connect the folded shaped charge cutting device to the drone's suspension mechanism via the suspension component to ensure that the wireless detonator is in a locked and safe state; Step 2: Control the drone to hover 2-3m away from the target transmission tower crossarm. In practice, adjustments can be made based on the structure of the transmission tower crossarm. Monitor the work area using the drone's camera. Step 3: Control the drone to fly around the crossarm as the axis, so that the energy-concentrating cutting device is attached to the surface of the crossarm by the adsorption component. Then the drone is released from the suspension connection and flies away from the site. Step 4: In a safe area, send a detonation command to the wireless detonator via wireless signal to detonate the detonating cord and all shaped charge, completing the crossarm cutting.

[0027] The energy-concentrating cutting component has a cross-sectional side length a that satisfies the relationship a≥2.2h with the energy-concentrating busbar length h of the energy-concentrating groove, and its length L satisfies the relationship L=0.6D with the maximum cross-sectional side length D of the cut crossarm, ensuring the compatibility of the device with the crossarm and the adsorption stability.

[0028] This invention employs a fully unmanned design that combines "drone deployment and wireless detonation." Operators do not need to approach the transmission tower or crossarm; they only need to complete the device mounting, flight control, and detonation command transmission from a safe area on the ground. This completely avoids safety risks such as falls from heights, component collapses, and blast shock waves, fundamentally solving the core pain point of personnel exposure to high-risk environments in traditional operations and significantly improving the safety level of transmission tower dismantling operations. Attached Figure Description

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the energy-concentrated cutting component; Figure 3 and Figure 4 This is a cross-sectional view of the energy-concentrating cutting component.

[0031] In the diagram: 1. Concentrated cutting component; 11. Concentrated groove; 2. Flexible connecting pipe; 3. Adsorption component; 4. Suspension component; 5. Detonator. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-4 An energy-concentrating cutting device for precise cutting of steel crossarms of transmission towers includes several energy-concentrating cutting components 1 with identical structures. The energy-concentrating cutting device forms a flexible chain structure in the form of an eel joint by connecting multiple energy-concentrating cutting components 1 end to end. The connected parts are fixedly connected by a compressible flexible connecting pipe 2. The flexible connecting pipe 2 is made of high-strength elastic material and can achieve 0-180° bending deformation, so that the whole device can adapt to the cylindrical or polygonal cross-sectional contour of the transmission tower crossarm and complete the tight winding layout. The shaped charge cutting component 1 is a high-strength, lightweight structure welded from aluminum alloy and copper. Its cross-section is polygonal, preferably square. The square cross-section design ensures that after the device is wrapped around the crossarm, regardless of the deployment angle, at least one outer surface can be tightly attached to the surface of the crossarm. Each outer surface of the shaped charge cutting component 1 has a linear shaped charge groove 11 integrally machined along its length. The groove 11 is triangular in shape, and the groove opening accuracy is controlled within ±0.1mm. The groove is filled with a black shaped charge, and a copper shaped charge liner is fitted to the groove opening. The shaped charge liner is tightly attached to the groove wall of the shaped charge groove 11, which can concentrate energy to form a high-speed metal jet after the charge is detonated, achieving instantaneous cutting of the steel crossarm. The length of each shaped charge cutting component 1 and the length of the shaped charge busbar of the shaped charge groove 11 are designed to be adapted to the cross-sectional specifications of the transmission tower crossarm. The total length of multiple shaped charge cutting components 1 connected in series can be flexibly adjusted according to the cutting section length of the target crossarm to ensure the continuity and uniformity of the cutting coverage.

[0034] Example 1: The cutting target is the main material of the crossarm of a 110kV cat head tower, ∠90×8, Q345B.

[0035] The shaped charge cutting component 1 is welded from aluminum alloy and copper. Each shaped charge cutting component 1 has a square cross-section with a side length 'a' of 15 mm and a length 'L' of 54 mm. Linear shaped charge grooves 11 are machined on all four outer surfaces of each component 1. The focusing angle 'α' of the groove 11 is designed to be 70°, and the length of the focusing generatrix 'h' is 6 mm. The grooves are filled with black explosive, and the shaped charge liner is made of copper. N35 type neodymium iron boron permanent magnets are adhered to each outer surface of the device.

[0036] Example 2: The cutting target is the main crossarm material of a 220kV double-circuit drum-shaped tower, ∠180×16, Q345B. The shaped charge cutting component 1 is welded from aluminum alloy and copper. Each shaped charge cutting component 1 has a square cross-section with a side length α of 30mm and a length L of 108mm. Linear shaped charge grooves 11 are machined on all four outer surfaces of each shaped charge cutting component 1. The focusing angle α of the focusing groove 11 is designed to be 80°, and the length h of the focusing busbar is 12mm. The grooves are filled with black explosive, and the shaped charge liner is made of copper. N35 type neodymium iron boron permanent magnets are adhered to each outer surface of the device.

[0037] Operators, located in a safe area on the ground, inspect the overall integrity of the eel-shaped shaped charge cutting device. They connect the hanging ring at one end of the device to the dedicated electromagnetic release suspension mechanism beneath the drone. A system power-on self-test is performed to confirm normal communication between the drone and the suspension mechanism, and to verify that the wireless detonator at the end of the device has a clear and locked communication link with the ground control system. After completing all checks, the drone carrying the device takes off.

[0038] The operator controls the drone to fly towards the target power transmission tower. Using the real-time footage transmitted by the drone's front-mounted high-definition camera, the operator precisely flies the drone to a position 0.5-1.0 meters to the side of the target crossarm and hovers it.

[0039] The drone is controlled to slowly circle the crossarm as its axis. The device is dragged along by the drone and naturally circles the crossarm. Magnets on the device's surface allow it to be attached segment by segment to different surfaces of the crossarm.

[0040] After the operator confirms via drone image transmission that the device is fully attached and locked correctly, they send a command through the ground control station to de-energize the electromagnetic release device beneath the drone, disengaging the suspension mechanism from the device's suspension ring. The drone then flies away from the work site and returns to the designated take-off and landing point.

[0041] After all personnel and equipment have been evacuated to a safe area, the operator sends an encrypted detonation signal to the wireless detonator on the device via an independent wireless detonation system. Upon receiving the signal, the detonator detonates instantly, igniting the central detonating cord that runs through all the shaped charge cutting components 1. The detonation wave, passing through the detonating cord, almost simultaneously detonates the shaped charge within each shaped charge cutting component 1. The resulting high-speed metal jet acts on the crossarm simultaneously from four directions, instantly severing it and completing the precise demolition task. The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A shaped charge cutting device, characterized in that, The energy-concentrating cutting device is a flexible chain structure formed by connecting multiple energy-concentrating cutting components (1) in series through a flexible connecting pipe (2). The cross-section of the energy-concentrating cutting component (1) is polygonal, and each outer surface of the energy-concentrating cutting component (1) used to adhere to the object being cut has an energy-concentrating groove (11) along its length direction.

2. The energy-concentrating cutting device according to claim 1, characterized in that, The energy-concentrating trough (11) is triangular in shape and has an opening angle of α.

3. The energy-concentrating cutting device according to claim 2, characterized in that, α is equal to 60–90°.

4. The energy-concentrating cutting device according to claim 1, characterized in that, Each outer surface of the energy-concentrating cutter (1) for adhering to the object being cut is provided with an adsorption element (3), which is used to adsorb the energy-concentrating cutter (1) onto the object being cut.

5. The energy-concentrating cutting device according to claim 4, characterized in that, The adsorption element (3) is a magnet, which is used to magnetically adsorb the energy-concentrating cutting element (1) onto the metal crossbar.

6. The energy-concentrating cutting device according to claim 1, characterized in that, The cross-sectional side length a of the energy-concentrating cutting component (1) and the energy-concentrating busbar length h of the energy-concentrating groove satisfy the relationship a≥2.2h.

7. The energy-concentrating cutting device according to claim 1, characterized in that, The energy-concentrating cutting component (1) has a hole extending through it along its length. The hole is connected to the connecting pipe (2). A detonator (5) passes through the hole and the connecting pipe (2) in sequence.

8. The energy-concentrating cutting device according to claim 7, characterized in that, The detonator (5) is a detonating cord, and the end of the detonating cord is provided with a detonator.

9. The energy-concentrating cutting device according to claim 1, characterized in that, The energy-concentrating cutting device also includes a suspension member (4), which is disposed on the energy-concentrating cutting member (1).

10. A method of applying the energy-concentrating cutting device according to any one of claims 1 to 9, characterized in that, The energy-concentrating cutting device is mounted on the aircraft to perform cutting operations.

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