Modular shaped charge cutting device and method of assembly thereof

Abstract

This invention provides a modular shaped charge blasting cutting device and its assembly method. The assembly involves first inserting one end of the outer shell into the first sleeve of the connector, placing the outer shell on a support plate with its through-hole facing downwards, and then inserting a metal shaped charge shield into the outer shell with its opening facing downwards. The first pre-tightening component is then adjusted and tightened. Similarly, the assembly involves inserting one end of the outer shell into the second sleeve of the connector, placing the outer shell on a support plate with its through-hole facing downwards, and then inserting a metal shaped charge shield into the outer shell. The second pre-tightening component is then adjusted and tightened. The connector and the separately designed standard cutter components of this application allow for flexible assembly of shaped charge blasting cutting packages, enabling the shaped charge blasting cutting device to be adaptively adjusted as needed. This solves the technical problems of poor cutting efficiency and unsatisfactory cutting effects in existing devices.

Description

Technical Field

[0001] This invention relates to the field of blasting cutting technology, and in particular to a modular shaped charge blasting cutting device and its assembly method. Background Technology

[0002] Targeted explosive cutting is a cutting technology based on the shaped charge effect. It can cut walls, concrete structures, glass, and other materials, and is increasingly used in various fields. Other hard materials such as metal sheets and pipes can also be cut using shaped charge cutting devices. The device is placed on the plane of the metal sheet, with the shaped charge groove facing the surface. Utilizing the shaped charge effect, the energy of the explosive detonation is concentrated along the axis of the shaped charge groove and acts on the shaped charge liner. The liner is then formed into a high-speed, high-pressure metal jet, thus cutting the metal. The linear cut produced by the action of the plate material, the shaped charge blasting cutting device has the characteristics of easy setup, simple operation, and short operation time. Compared with the existing mechanical cutting and flame cutting methods, it has a fast construction speed, high efficiency and low cost. Therefore, it is widely used in cutting ship hulls, dismantling platforms, and demolishing steel structures. It is a construction technology with great development potential. Various shaped charge blasting cutting devices have been proposed in applications such as CN202010295170.2 and CN201810535339.X.

[0003] Existing shaped charge cutting devices all include a shell, explosive, and a shaped charge liner, with the liner made of metal. These components are designed specifically for the shape and structure of the shaped charge cutting device. However, in practical applications, different targets require different cutting lengths. Therefore, the shell needs to be set to different lengths according to different targets. The length of the shaped charge cutting device should be consistent with or nearly consistent with the length of the target to ensure a single cut to the preset length. Different blast heights directly affect the cutting effect, and ensuring the optimal blast height guarantees the penetration effect of the shaped charge cutting device. Therefore, in actual cutting, the adaptation of the length of the shaped charge cutting device to the target and the guarantee of the blast height are key factors in ensuring cutting efficiency. Thus, designing a shaped charge cutting device with adjustable length and blast height to ensure high cutting efficiency and good results is an important research direction for shaped charge cutting devices. Summary of the Invention

[0004] This application proposes a modular shaped charge blasting cutting device and its assembly method, which solves the technical problems existing in the prior art, such as the inability of the blasting cutting device to flexibly adjust the cutting length for plates of different sizes, and the inability of the blasting cutting device to flexibly adjust the blasting height to the optimal value according to the different materials of the explosives and the shaped charge liner, resulting in poor cutting efficiency and poor cutting effect.

[0005] The technical solution adopted in this invention is: a modular shaped charge blasting and cutting device, comprising:

[0006] A standard cutter assembly includes an assemblable outer shell and a metal shaped charge shield. The outer shell has ports at both ends along its length and through openings extending through both ends along its length. The metal shaped charge shield has an inverted V-shaped cross-section and is detachably mounted inside the outer shell, with its opening opposite the through openings. The cavity between the outer shell and the metal shaped charge shield is used to fill explosives.

[0007] The docking device is used to dock two adjacent standard cutter assemblies. The docking device includes a first sleeve and a second sleeve coaxially arranged for being fitted onto the outer shell. The inner sides of the first sleeve and the second sleeve are provided with a pair of horizontal support plates. The support plates extend along the axial direction of the first sleeve and the second sleeve, and the two support plates are arranged opposite each other and located on the same horizontal plane. The two ends of the outer shell located in the length direction of the through-hole are respectively disposed on the two support plates. The docking device also includes a first pre-tightening assembly for pressing the first sleeve and the outer shell together and a second pre-tightening assembly for pressing the second sleeve and the outer shell together. The surface of the first pre-tightening assembly or the second pre-tightening assembly is provided with an adjusting bracket for adjusting the blast height of the shaped charge blasting cutting device.

[0008] Furthermore, the first sleeve is made of a flexible material, and the first pre-tightening component is disposed on the outer surface of the first sleeve. The first pre-tightening component includes a first clamp and a second clamp for clamping and squeezing the first sleeve. Both the first clamp and the second clamp are semi-circular. One end of the first clamp and one end of the second clamp are hinged together, and the other end of the first clamp and the other end of the second clamp are provided with a buckle component.

[0009] Furthermore, the latching assembly includes:

[0010] A first snap-fit ​​component is disposed on the first pipe clamp. The first snap-fit ​​component includes a first central shaft and at least one first buckle rotatably disposed on the first central shaft. The first buckle includes a first slot.

[0011] The second snap-fit ​​component is disposed on the second pipe clamp. The second snap-fit ​​component includes a second central shaft and at least one second buckle rotatably disposed on the second central shaft. The second buckle includes a second slot.

[0012] The first buckle rotates toward the second central axis so that the first slot engages with the second central axis, and the second buckle rotates toward the first central axis so that the second slot engages with the first central axis.

[0013] Furthermore, the second sleeve has an external thread on its surface, and the second sleeve has a slit to divide the second sleeve into two halves in its axial direction. The second sleeve curves outward from one end of the slit near the first sleeve to the other end of the slit. The second pre-tightening assembly includes a sliding adjusting block, the sliding adjusting block has a through hole with an internal thread, the sliding adjusting block is sleeved on the second sleeve, and the adjusting bracket is disposed on the sliding adjusting block.

[0014] Furthermore, a retaining ring is provided on the end of the second sleeve away from the first sleeve, the sliding adjusting block abuts against the retaining ring, and when the sliding adjusting block abuts against the retaining ring, the adjusting bracket is located directly below the through opening of the pair of support plates.

[0015] Furthermore, the first pre-tightening component is detachably disposed on the outside of the first sleeve, and the sliding adjusting block is fitted onto the second sleeve from the end of the first sleeve.

[0016] Preferably, the metal energy-concentrating cover is made of stainless steel, with an included angle of 65°. The opening width of the metal energy-concentrating cover is not less than the width of the through-hole, and the opening width of the metal energy-concentrating cover is equal to 70mm, with a blast height of 25mm.

[0017] Preferably, the metal energy-concentrating shield is made of copper, with an included angle of 70°. The opening width of the metal energy-concentrating shield is not less than the width of the through-hole, and the opening width of the metal energy-concentrating shield is equal to 70mm, with a blast height of 25mm.

[0018] An assembly method for the modular shaped charge blasting cutting device as described above, the assembly method comprising:

[0019] Step 1: Assembly of the docking device and the first standard cutter assembly. First, insert one end of the outer shell into the first sleeve of the docking device. Place the outer shell on the support plate, keeping the through-hole of the outer shell facing downwards. Then, insert the metal energy-concentrating shield into the outer shell, with the opening of the metal energy-concentrating shield facing downwards. Adjust the first pre-tightening assembly to secure the outer shell, the metal energy-concentrating shield, and the first sleeve.

[0020] Step 2: Assembly of the docking device and the second standard cutter assembly. First, insert one end of the outer shell into the second sleeve of the docking device. Place the outer shell on the support plate, keeping the through-hole of the outer shell facing downwards. Then, insert the metal energy-concentrating cover into the outer shell. Adjust the second pre-tightening assembly to secure the second sleeve, the outer shell, and the metal energy-concentrating cover.

[0021] Furthermore, step two also includes: selecting a sliding adjustment block that is height-suitable for adjusting the bracket, adjusting the sliding adjustment block to rotate on the second sleeve until the sliding adjustment block abuts against the retaining ring to secure the second sleeve, the outer shell, and the metal energy-concentrating cover, while positioning the adjusting bracket directly below the through-hole.

[0022] The beneficial effects are as follows: This invention provides a modular shaped charge blasting cutting device and its assembly method. Through the docking device and separately designed standard cutter components provided in this application, shaped charge blasting cutting charges can be flexibly assembled, allowing the shaped charge blasting cutting device to be adaptively adjusted as needed. For example, the length of the cutting device can be adjusted according to the length of the cutting target for one-time cutting; the metal shaped charge shield and outer shell are designed as standard parts made of different materials, allowing for free combination of explosives, metal shaped charge shields, and outer shells, flexibly used on cutting targets of different materials, realizing the variability of the shaped charge blasting cutting device, enabling it to be used on different cutting targets with the most cost-effective configuration; the blasting height can be flexibly adjusted according to the configuration of the metal shaped charge shield, outer shell, and explosives, thereby ensuring that the shaped charge blasting cutting device can achieve the best cutting effect. This perfectly solves the technical problems existing in the present invention, such as the inability of the blasting cutting device to flexibly adjust the cutting length for plates of different sizes, and the inability of the blasting cutting device to flexibly adjust the blasting height to the optimal value according to the different materials of the explosives and shaped charge shields used, resulting in poor cutting efficiency and unsatisfactory cutting effects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the standard cutter assembly and the docking device before assembly in this invention.

[0024] Figure 2 This is a structural schematic diagram of the standard cutter assembly and docking device in the assembly state of this invention.

[0025] Figure 3 This is a schematic diagram of the assembly structure of the outer shell, metal energy-concentrating cover and docking device in this invention.

[0026] Figure 4 A schematic diagram of the structure of one side of the second sleeve of the modular shaped charge blasting cutting device in this invention.

[0027] Figure 5 This is a three-dimensional structural diagram of the docking device in this invention.

[0028] The attached icons are numbered as follows:

[0029] 1. Standard cutter assembly; 11. Housing; 12. Metal energy-concentrating cover; 2. Connector; 21. First sleeve; 22. Second sleeve; 23. First pre-tightening assembly; 231. First pipe clamp; 232. Second pipe clamp; 233. First snap-fit ​​component; 2331. First central shaft; 2332. First snap-fit; 234. Second snap-fit ​​component; 2341. Second central shaft; 2342. Second snap-fit; 24. Second pre-tightening assembly; 25. Support plate; 26. Cutting notch; 27. Sliding adjustment block; 28. Adjustment bracket. Detailed Implementation

[0030] 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.

[0031] This application discloses a modular shaped charge blasting and cutting device, combined with an attached... Figures 1 to 4 As shown, the modular shaped charge blasting cutting device mainly consists of two parts: a standard cutter assembly 1 and a docking device 2. The docking device 2 is used to dock two adjacent standard cutter assemblies 1 and ensure that the two adjacent standard cutter assemblies 1 remain coaxial and that the shaped charge slots of all standard cutter assemblies 1 remain on the same horizontal line.

[0032] Specifically, based on the flexible assembly and adjustable frying height features of this application, and in conjunction with the attached... Figure 3 As shown, the standard cutter assembly 1 in this application consists of a housing 11 and a metal shaped charge shield 12. The housing 11 has ports at both ends along its length, and a through-hole is provided on the side of the housing 11, penetrating both ends along its length. The metal shaped charge shield 12 has an inverted V-shaped cross-section and is detachably installed inside the housing 11. The metal shaped charge shield 12 is installed inside the housing 11 with its opening facing the through-hole. The two plates of the metal shaped charge shield 12 are placed on both sides of the through-hole. The cavity between the housing 11 and the metal shaped charge shield 12 is used to fill explosives. The connector 2 fixes and presses the housing 11 tightly, so that the through-hole of the housing 11 is not pried open and the metal shaped charge shield 12 will not move out of the through-hole. The housing 11 and the metal shaped charge shield 12 are assembled together by a frame assembly method, and no auxiliary connection (adhesion or snap-fit) is required between them, which can improve the assembly efficiency of the shaped charge blasting cutting device.

[0033] Specifically, see the appendix. Figures 2 to 5As shown, the connector 2 in this application is used to connect two adjacent standard cutter assemblies 1. The connector 2 consists of a first sleeve 21, a second sleeve 22, a first pre-tightening assembly 23, and a second pre-tightening assembly 24. The first sleeve 21 and the second sleeve 22 are coaxially arranged, and their inner diameters are equal. The first sleeve 21 is mainly used to fit the outer shell 11 on one side of the connector 2, and the first pre-tightening assembly 23 secures the outer shell 11 on this side. The second sleeve 22 is mainly used to fit the outer shell 11 on the other side of the connector 2, and the second pre-tightening assembly 24 secures the outer shell 11 on this side. Furthermore, a pair of support plates 2 are provided in both the first sleeve 21 and the second sleeve 22. 5. Each pair of support plates 25 includes two support plates 25 arranged opposite each other, and the support plates 25 in the first sleeve 21 and the second sleeve 22 are kept on the same horizontal straight line. The support plates 25 are used to support the outer shell 11. During installation, the parts of the outer shell 11 located on both sides of the through-hole are respectively installed on the support plates 25 on both sides. The through-hole faces downward. The metal energy-concentrating cover 12 is set inside the outer shell 11, and its opening also faces the through-hole downward. The first pre-tightening component 23 can press the outer shell 11, the first sleeve 21 and the metal energy-concentrating cover 12 on one side of the docking device 2 together. The second pre-tightening component 24 can press the outer shell 11, the second sleeve 22 and the metal energy-concentrating cover 12 on the other side of the docking device 2 together.

[0034] The docking device 2 and the separately designed standard cutter assembly 1 provided in this application enable flexible assembly of shaped charge cutting packages, allowing the shaped charge cutting device to be adaptively adjusted as needed. For example, the length of the cutting device can be adjusted according to the length of the target to facilitate one-time cutting; the metal shaped charge shield 12 and the outer shell 11 can be designed as standard parts made of different materials, allowing for free combination of explosives, metal shaped charge shield 12, and outer shell 11, which can be flexibly used on cutting targets of different materials, thus realizing the variability of the shaped charge cutting device and enabling it to be used on different cutting targets with the most cost-effective configuration; the blast height can be flexibly adjusted according to the configuration of the metal shaped charge shield 12, outer shell 11, and explosives, thereby ensuring that the shaped charge cutting device can achieve the best cutting effect.

[0035] In a preferred embodiment, the outer shell 11 has a circular cross-section and can be made of materials such as PVC, and a through-hole is provided on the side of the outer shell 11; while the metal energy-concentrating cover 12 has an inverted V-shaped cross-section and can be made of metal materials such as copper and iron.

[0036] More specifically, the first sleeve 21 in this application is made of a flexible material, and the first pre-tightening component 23 is disposed on the outer surface of the first sleeve 21. The first pre-tightening component 23 includes a first pipe clamp 231 and a second pipe clamp 232, both of which are semi-circular. One end of the first pipe clamp 231 and one end of the second pipe clamp 232 are hinged together, and the other end of the first pipe clamp 231 and the other end of the second pipe clamp 232 are provided with a snap-fit ​​component. The first pipe clamp 231 and the second pipe clamp 232 rotate relative to each other to form a circular ring for gripping and squeezing the first sleeve 21. The snap-fit ​​component includes a first snap-fit ​​part 233 and a second snap-fit ​​part 234. The first snap-fit ​​part 233 is disposed on the first pipe clamp 231 and includes a first central shaft 2331 and at least one rotatably disposed on the first pipe clamp 231. A first latch 2332 is mounted on a first central shaft 2331, and the first latch 2332 includes a first latching groove. A second latching component 234 is mounted on a second pipe clamp 232, and the second latching component 234 includes a second central shaft 2341 and at least one second latch 2342 rotatably mounted on the second central shaft 2341. The second latch 2342 includes a second latching groove. When the first pre-tightening component 23 is fitted onto the first sleeve 21, the first latch 2332 rotates toward the second central shaft 2341 so that the first latching groove engages with the second central shaft 2341. The second latch 2342 rotates toward the first central shaft 2331 so that the second latching groove engages with the first central shaft 2331. This causes the first latching component 233 and the second latching component 234 to engage with each other, thereby pressing the first sleeve 21 and the outer casing 11 together.

[0037] Furthermore, in this application, the second sleeve 22 has an external thread on its surface and a notch 26 is provided to divide the second sleeve 22 into two halves in its axial direction. The second sleeve 22 protrudes outward from the end of the notch 26 near the first sleeve 21 to the other end of the notch 26. The second pre-tightening assembly 24 includes a sliding adjustment block 27. The sliding adjustment block 27 has a through hole and an internal thread on the inner wall of the through hole. The sliding adjustment block 27 is sleeved on the second sleeve 22. The sliding adjustment block 27 slides axially on the second sleeve 22. When the sliding adjustment block 27 rotates from the end of the second sleeve 22 near the first sleeve 21 to the outer end of the second sleeve 22, it squeezes the two halves of the second sleeve 22 inward, thereby pressing the outer shell 11 set inside the second sleeve 22. The adjusting bracket 28 is provided on the sliding adjustment block 27, thereby using the adjusting bracket 28 on the sliding adjustment block 27 to raise the shaped charge blasting cutting device to meet the blasting height requirement.

[0038] Furthermore, a retaining ring is provided at the end of the second sleeve 22 away from the first sleeve 21. The sliding adjusting block 27 can abut against the retaining ring. When the sliding adjusting block 27 abuts against the retaining ring, the adjusting bracket 28 is positioned directly below the through-hole of the pair of support plates 25. By setting the stroke limit value of the sliding adjusting block 27, the adjusting bracket 28 is positioned directly below the through-hole each time the sliding adjusting block 27 rotates and presses to the limit position on the second sleeve 22. This ensures that the shaped charge blasting cutting device is positioned at the ideal blasting height while providing pre-tightening. At the same time, the brackets of each docking device 2 are in contact with the surface of the cutting target, which also keeps the shaped charge slots of each standard cutter component 1 of the shaped charge blasting cutting device in the same straight line and horizontal position, ensuring the flatness of the cutting line and improving the cutting effect.

[0039] Furthermore, this application detachably mounts the first pre-tightening component 23 on the outside of the first sleeve 21. For example, the first pre-tightening component 23 is not directly connected to the first sleeve 21. When using the first pre-tightening component 23, the first sleeve 21 can be clamped by directly clamping the first pipe clamp 231 and the second pipe clamp 232 onto the first sleeve 21. The first pre-tightening component 23 can be removed when not in use. This allows the sliding adjustment block 27 to be inserted from the end of the first sleeve 21 onto the second sleeve 22. Different models of sliding adjustment blocks 27 can be selected, and each type of sliding adjustment block 27 corresponds to a different height adjustment bracket 28, thereby meeting the user's adaptability to the blast height based on the size parameters of the explosive and the metal shaped charge 12. Adjustments are made to ensure optimal cutting results. Furthermore, the support plate 25 within the connector 2 ensures that the standard cutter assemblies 1 on both sides of the connector 2 remain coaxial, and that the lowest through-holes are aligned in the same straight line. When the adjusting bracket 28 on the connector 2 abuts against the retaining ring, the connector 2 directly contacts the cutting target via the adjusting bracket 28 (if the cutting target is vertical or inclined, the adjusting bracket 28 can also be bonded to the cutting target using double-sided tape). This ensures that the distance between each connector 2 and the cutting target is consistent, and that the support plate 25 is also aligned in a straight line. This ensures that the central axis of the entire device is on the same plane, and the jet direction is concentrated in the same straight line, guaranteeing a clean cut.

[0040] Preferably, this application selects two relatively superior implementation methods in the optional embodiments:

[0041] Example 1:

[0042] The metal energy-concentrating cover 12 is made of stainless steel. The included angle of the metal energy-concentrating cover 12 is 65°. The opening width of the metal energy-concentrating cover 12 is not less than the width of the through opening. The opening width of the metal energy-concentrating cover 12 is 70mm. The corresponding frying height of the adjusting bracket 28 is 20-25mm, preferably 25mm.

[0043] Example 2:

[0044] The metal energy-concentrating cover 12 is made of copper. The included angle of the metal energy-concentrating cover 12 is 70°. The opening width of the metal energy-concentrating cover 12 is not less than the width of the through opening. The opening width of the metal energy-concentrating cover 12 is 70mm. The corresponding blasting height of the adjusting bracket 28 is 20-25mm, preferably 25mm.

[0045] The feasibility test data for Examples 1 and 2 are shown in Tables 1 and 2:

[0046] Table 1. Effect of the width of the drug-shaped liner opening on penetration effect

[0047]

[0048] Note: All experiments above were conducted on a single 25mm steel plate. Unless otherwise specified, all parameters (such as the material and thickness of the metal shaped charge shield) were identical. Table 1 shows that a 50mm opening width of the metal shaped charge shield failed to cut the steel plate. A 60mm opening width successfully cut the steel plate, but the jet was not concentrated enough; although it cut the plate, the cutting depth was only about 23mm to 24mm, and the plate could only be pried open by inertia. A 70mm opening width successfully cut the steel plate, and the plate could be cut even when the blast height was maintained between 20mm and 25mm. The experimental variables in experiments 6 and 7 also included: the ports at both ends of the shell in experiment 6 were sealed, while the ports at both ends of the shell in experiment 7 were not sealed. This simply verifies that whether the ports are sealed or not has no significant impact on the cutting effect.

[0049] Table 2. Influence of different materials of energy-concentrating metal shields on penetration effect

[0050]

[0051]

[0052] According to Table 2, the stainless steel metal energy shroud 12 has the best penetration effect on the steel plate when the angle is 65°, while the copper metal energy shroud 12 has the best penetration effect when the angle is 70°. When the blasting height range is 25mm, the metal energy shroud 12 of both materials can basically guarantee a good or better blasting penetration effect, while the proportion of poor blasting penetration effect is relatively high when the blasting height is selected.

[0053] For example, the evaluation indicators for the above-mentioned penetration effect include: good penetration effect, the steel plate is completely penetrated without adhesion, and the steel plate fragments are small; good penetration effect, the steel plate is penetrated without adhesion, and the steel plate fragments are relatively large; good penetration effect, the steel plate is penetrated with a small amount of adhesion; poor penetration effect, the steel plate is penetrated but still has a large amount of adhesion.

[0054] Furthermore, based on the technical solution of the modular shaped charge blasting cutting device in this application, an assembly method for the modular shaped charge blasting cutting device is further proposed, the assembly method including:

[0055] Step 1: Assembly of the docking device 2 and the first standard cutter assembly 1. First, insert one end of the outer shell 11 into the first sleeve 21 of the docking device 2. Place the outer shell 11 on the support plate 25, keeping the through opening of the outer shell 11 facing downwards. Then, insert the metal energy-concentrating cover 12 into the outer shell 11, with the opening of the metal energy-concentrating cover 12 facing downwards. Adjust the first pre-tightening assembly 23 to fasten the outer shell 11, the metal energy-concentrating cover 12, and the first sleeve 21.

[0056] Step 2: Assembly of the docking device 2 and the second standard cutter assembly 1. First, insert one end of the outer shell 11 into the second sleeve 22 of the docking device 2. Place the outer shell 11 on the support plate 25, keeping the through-hole of the outer shell 11 facing downward. Then, insert the metal energy-concentrating cover 12 into the outer shell 11. Adjust the second pre-tightening assembly 24 to tighten the second sleeve 22, the outer shell 11 and the metal energy-concentrating cover 12.

[0057] Assemble several standard cutter components 1 according to actual needs in the above manner. After assembling the standard cutter components 1 and the docking device 2, it is necessary to fill the cavity formed between the outer shell 11 and the metal shaped charge shroud 12 with explosives, or fill the cavity with explosives after assembling each docking device 2 and standard cutter component 1, and detonate the explosives through the hole reserved at the top of the outer shell 11.

[0058] More preferably, in step two, a sliding adjustment block 27 that is height-adapted to the adjustment bracket 28 can be selected as needed. The sliding adjustment block 27 is rotated on the second sleeve 22 until it abuts against the retaining ring to secure the second sleeve 22, the outer shell 11, and the metal energy-concentrating cover 12. At the same time, the adjustment bracket 28 is positioned directly below the through-hole. Thus, while the standard cutter assembly 1 is fixed, the cutting height can be adjusted to a preset value to ensure the cutting effect.

[0059] The shaped charge blasting cutting device in this application has advantages such as simple assembly, strong applicability, high cutting precision, and smooth cutting lines. Furthermore, the standardized and modular design of the outer shell 11, the metal shaped charge cover 12, and the docking device 2 makes these components highly replaceable. Further research can be conducted to assemble different shaped charge blasting cutting devices for practical applications based on the material and shape of the metal shaped charge cover 12, the type of explosive, the blast height, and the hardness of the cutting target. Compared to pre-made explosive cutting devices, this application offers greater operational flexibility and a wider range of applications. It perfectly solves the technical problems of existing blasting cutting devices, such as the inability to flexibly adjust the cutting length for plates of different sizes and the inability to flexibly adjust the blast height to the optimal level based on the explosive and the material of the shaped charge cover, resulting in poor cutting efficiency and unsatisfactory cutting effects.

[0060] Although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A modular shaped charge cutting apparatus, characterized by, The utility model relates to a standard cutter assembly (1) and a docking device (2) for docking two standard cutter assemblies (1) adjacent to each other. The standard cutter assembly (1) comprises a splicable shell (11) and a metal shaped charge liner (12), the two ends of the shell (11) in the length direction are provided with ports, the shell (11) is provided with a through hole extending through the two ends in the length direction, the cross section of the metal shaped charge liner (12) is inverted V-shaped, the metal shaped charge liner (12) is detachably arranged on the inner side of the shell (11), and the opening of the metal shaped charge liner (12) is opposite to the through hole, and the cavity between the shell (11) and the metal shaped charge liner (12) is used for filling explosive. The docking device (2) is used for docking two standard cutter assemblies (1) adjacent to each other, the docking device (2) comprises coaxially arranged first sleeve (21) and second sleeve (22) for sleeving on the shell (11), and the inner sides of the first sleeve (21) and the second sleeve (22) are provided with a pair of horizontal support plates (25), the support plates (25) extend in the axial direction of the first sleeve (21) and the second sleeve (22), and the two support plates (25) are oppositely arranged and located on the same horizontal plane, the two ends of the shell (11) in the length direction of the through hole are arranged on the two support plates (25), and the docking device (2) further comprises a first pre-tightening assembly (23) for pressing the first sleeve (21) and the shell (11) and a second pre-tightening assembly (24) for pressing the second sleeve (22) and the shell (11), and the surface of the first pre-tightening assembly (23) or the second pre-tightening assembly (24) is provided with an adjusting support (28) for adjusting the height of the shaped charge blasting cutting device.

2. The modular shaped charge cutting device of claim 1, wherein, The first sleeve (21) is made of flexible material, the first pre-tightening assembly (23) is arranged on the outer surface of the first sleeve (21), the first pre-tightening assembly (23) comprises first pipe clamp (231) and second pipe clamp (232) for tightly holding and extruding the first sleeve (21), the first pipe clamp (231) and the second pipe clamp (232) are semicircular, one end of the first pipe clamp (231) is hinged to one end of the second pipe clamp (232), and the other end of the first pipe clamp (231) is provided with a buckle assembly.

3. The modular shaped charge cutting device of claim 2, wherein, The buckle assembly comprises: A first clamping part (233) is arranged on the first pipe clamp (231), the first clamping part (233) comprises a first central shaft (2331) and at least one first buckle (2332) rotatably arranged on the first central shaft (2331), and the first buckle (2332) comprises a first clamping groove; A second clamping part (234) is arranged on the second pipe clamp (232), the second clamping part (234) comprises a second central shaft (2341) and at least one second buckle (2342) rotatably arranged on the second central shaft (2341), and the second buckle (2342) comprises a second clamping groove; The first buckle (2332) rotates towards the second central shaft (2341) to make the first clamping groove clamped on the second central shaft (2341), and the second buckle (2342) rotates towards the first central shaft (2331) to make the second clamping groove clamped on the first central shaft (2331).

4. The modular shaped charge cutting device of claim 3, wherein, The second sleeve (22) is provided with external threads on the surface, and the second sleeve (22) is provided with a cutout (26) to divide the second sleeve (22) into two halves in the axial direction, and the second sleeve (22) is outwardly tilted from one end of the cutout (26) close to the first sleeve (21) to the other end of the cutout (26); the second pre-tightening assembly (24) comprises a sliding adjusting block (27), the sliding adjusting block (27) is provided with a through hole, the through hole is provided with internal threads, the sliding adjusting block (27) is sleeved on the second sleeve (22), and the adjusting support (28) is arranged on the sliding adjusting block (27).

5. The modular shaped charge cutting device of claim 4, wherein, The second sleeve (22) is further provided with a retaining ring on the end away from the first sleeve (21), the sliding adjusting block (27) abuts against the retaining ring, and when the sliding adjusting block (27) abuts against the retaining ring, the adjusting support (28) is arranged directly below the through hole of the pair of support plates (25).

6. The modular shaped charge cutting device of claim 5, wherein, The first pre-tightening assembly (23) is detachably arranged outside the first sleeve (21), and the sliding adjusting block (27) is sleeved on the second sleeve (22) from the end of the first sleeve (21).

7. The modular shaped charge cutting device of claim 1, wherein, The material of the metal shaped charge liner (12) is stainless steel, the included angle is 65°, the opening width of the metal shaped charge liner (12) is not less than the width of the through hole, and the opening width of the metal shaped charge liner (12) is equal to 70mm, and the blasting height is 25mm.

8. The modular shaped charge cutting device of claim 1, wherein, The material of the metal shaped charge liner (12) is red copper, the included angle is 70°, the opening width of the metal shaped charge liner (12) is not less than the width of the through hole, and the opening width of the metal shaped charge liner (12) is equal to 70mm, and the blasting height is 25mm.

9. A method of assembling a modular shaped charge cutting apparatus as claimed in any one of claims 1 to 8, characterised in that, The assembling method comprises: Step one: assembly of the adapter (2) and the first standard cutter assembly (1), one end of the shell (11) is inserted into the first sleeve (21) of the adapter (2), the shell (11) is placed on the support plate (25), the through hole of the shell (11) is kept downward, then the metal shaped charge liner (12) is inserted into the shell (11), the opening of the metal shaped charge liner (12) is downward, and the first pre-tightening assembly (23) is adjusted to fasten the shell (11), the metal shaped charge liner (12) and the first sleeve (21); Step two: the assembly of the adapter (2) and the second standard cutter assembly (1), first insert one end of the housing (11) into the second sleeve (22) of the adapter (2), the housing (11) is placed on the support plate (25), keep the through hole of the housing (11) downward, then insert the metal shaped charge (12) into the housing (11), adjust the second pre-tightening assembly (24) to fasten the second sleeve (22), the housing (11) and the metal shaped charge (12).

10. The method of assembly of claim 9, wherein, The step two further comprises: as claimed in claim 5, the modular shaped charge cutting device, select the sliding adjustment block (27) of the adjusting support (28) height, adjust the rotation of the sliding adjustment block (27) on the second sleeve (22) until the sliding adjustment block (27) abuts against the stop ring to fasten the second sleeve (22), the housing (11) and the metal shaped charge (12), and at the same time, the adjusting support (28) is arranged directly below the through hole.

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