Guardrail steel pipe cutting device with built-in ring cutting mechanism

Abstract

The application provides a guardrail steel pipe cutting device with a built-in ring cutting mechanism and relates to cutting, which comprises a built-in ring cutting unit, the bottom of the built-in ring cutting unit is provided with a quick-release locking unit, the middle part of the quick-release locking unit is provided with a height adjusting unit, the surface of the height adjusting unit is equipped with a quick-release connecting seat corresponding to the quick-release locking unit, the middle part of the height adjusting unit is also provided with a bottom positioning seat and a top pressing seat, and a pipe inner supporting unit is arranged on the surface of the height adjusting unit and is arranged between the bottom positioning seat and the top pressing seat. The cutting machine can be deeply inserted into the guardrail steel pipe, and the ring cutting can be completed in the steel pipe under the ground. This makes the guardrail steel pipe separated from the bottom pouring seat and pulled out alone, completely avoids the serious damage of pulling up the whole pouring seat to the roadbed, and significantly reduces the cost of road reconstruction and expansion.

Description

Technical Field

[0001] This invention relates to the field of cutting, and more specifically, to a guardrail steel pipe cutting device with a built-in circumferential cutting mechanism. Background Technology

[0002] Currently, during highway reconstruction and expansion, it is necessary to dismantle existing steel guardrails. Existing guardrails typically have a considerable pre-embedded depth during actual installation, generally not less than 1.25 meters, and the bottom of the guardrails is usually buried underground using cement pouring.

[0003] Traditional demolition methods often involve direct removal, but this method has significant drawbacks: when pulling it out, the bottom grouting piles are also pulled out, which will seriously damage the roadbed structure and thus greatly increase the cost of handling and repairing the original roadbed. On the other hand, cutting it directly at the ground will leave the excess steel pipes underground, which not only poses certain safety hazards but also wastes resources.

[0004] Therefore, we have made improvements to this by proposing a guardrail steel pipe cutting device with a built-in circumferential cutting mechanism. Summary of the Invention

[0005] The purpose of this invention is to provide a guardrail steel pipe cutting device with a built-in ring cutting mechanism. By setting up a built-in ring cutting unit, the traditional demolition method of direct pulling is solved. However, this method has significant drawbacks: when pulling out, the bottom grouting pile will be pulled out, which will seriously damage the roadbed structure.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A guardrail steel pipe cutting device with a built-in ring cutting mechanism includes a built-in ring cutting unit. A quick-release locking unit is installed at the bottom of the built-in ring cutting unit. A height adjustment unit is provided in the middle of the quick-release locking unit. A quick-release connecting seat corresponding to the quick-release locking unit is assembled on the surface of the height adjustment unit. A bottom positioning seat and a top pressing seat are also provided in the middle of the height adjustment unit. An internal support unit sleeved on the surface of the height adjustment unit is provided between the bottom positioning seat and the top pressing seat. The height adjustment unit includes a hollow guide rod inserted into the guardrail steel pipe and an adjusting screw movably connected inside the hollow guide rod. Both sides of the hollow guide rod are provided with strip grooves that communicate with its interior. The end of the hollow guide rod is threadedly connected to a spherical part that contacts the bottom pouring seat of the guardrail steel pipe. The quick-release locking unit includes an upper housing and an upper mounting cavity opened in the upper housing, and a male locking component is installed in the upper mounting cavity; The quick-release connector includes a lower housing and a lower mounting cavity formed within the lower housing and corresponding to the upper mounting cavity above. A female locking member is provided in the lower mounting cavity.

[0007] As a preferred technical solution of this application, the built-in ring cutting unit includes a fixed ring fixed to the top of the upper housing and a rotating seat slidably disposed on the top of the fixed ring. An assembly seat is fixed to the top of the rotating seat, and a cutting machine is slidably disposed on the top of the assembly seat. A horizontal adjusting screw is movably connected inside the assembly seat. The assembly seat extends into the assembly seat and is threadedly connected to the horizontal adjusting screw. A rotary motor connected to the horizontal adjusting screw is fixed to one side of the assembly seat. The fixed ring has a guide ring inside, a first bevel gear is fixed to the top of the guide ring, a second bevel gear meshes with one side of the first bevel gear, and an adjusting motor connected to the second bevel gear is fixed to the side wall of the fixed ring.

[0008] As a preferred technical solution of this application, the male locking component includes an L-shaped support plate fixed to the two side walls of the upper mounting cavity and a locking hook movably connected to the surface of the L-shaped support plate. The top end of the locking hook extends to one side with a flip-connecting part, and the bottom end of the locking hook extends to the other side with a locking overlap part.

[0009] As a preferred technical solution of this application, the ends of the two flip-connecting parts are hinged with transmission arms, and the surfaces of the two transmission arms are movably connected to a transmission plate. An annular movable groove communicating with the upper mounting cavity is also provided in the upper housing. A connecting ring is slidably provided in the annular movable groove, and the connecting ring is fixedly connected to the corresponding transmission plate below.

[0010] As a preferred technical solution of this application, an inner rod is fixed to the top of the connecting ring, an outer rod is slidably sleeved on the surface of the inner rod, the top end of the outer rod is fixed to the top wall of the annular movable groove, and a support spring is sleeved on the surface of the inner rod and the outer rod, with the two ends of the support spring respectively fixed to the top of the corresponding connecting ring and the top wall of the annular movable groove.

[0011] As a preferred technical solution of this application, a transmission rope is fixed to the top of the inner rod, the transmission rope extends through the upper shell to the outside, and a guide cylinder is fixed on the upper shell at the position corresponding to the transmission rope.

[0012] As a preferred technical solution of this application, the female locking component includes a triangular locking block fixed in the lower mounting cavity. Both sides of the bottom of the triangular locking block have locking engagement platforms that are adapted to the locking engagement portion, and the top of the triangular locking block has an avoidance slope.

[0013] As a preferred technical solution of this application, a connecting column is fixed to the inner side of the lower housing, and an adjusting block is fixed to the lower housing through the connecting column. The adjusting block is sleeved on the surface of the hollow guide rod, and a fixing bolt is threaded to the surface of the adjusting block for fixing.

[0014] As a preferred technical solution of this application, the bottom positioning seat includes a bottom support seat sleeved on the surface of the hollow guide rod, and a positioning bolt is threadedly connected to the outer side of the bottom support seat; The top clamping seat includes a top support seat sleeved on the surface of the hollow guide rod, and the inner side of the top support seat extends into the hollow guide rod through a strip groove and is threadedly connected to the adjusting screw. The top support base has flip grooves on both sides, and a swing arm is movably connected in the flip groove. A toggle block is fixed at the inner end of the swing arm. The side wall of the flip groove has an arc-shaped groove concentric with the swing point of the swing arm. One end of the toggle block is slidably disposed in the arc-shaped groove, and a spring connected to the toggle block is connected in the arc-shaped groove.

[0015] As a preferred technical solution of this application, the tube support unit includes an inner support sleeve and an outer support sleeve sleeved on the surface of the hollow guide rod. The outer support sleeve is slidably sleeved on the top end of the inner support sleeve, and the inner diameter of the inner support sleeve is larger than the outer diameter of the top support seat.

[0016] As a preferred technical solution of this application, the surface of the inner support sleeve has an annular support protrusion near the outer support sleeve, and a return spring is sleeved on the surface of the inner support sleeve, with the two ends of the return spring respectively connected to the corresponding annular support protrusion and the end of the outer support sleeve; The inner support sleeve has a support plate on one side. An upper connecting plate and a lower connecting plate are hinged to the surface of the support plate. A middle connecting seat is movably connected to one end of the upper connecting plate. A connecting plate is hinged to the middle of the upper connecting plate. An upper connecting seat is movably connected to the end of the connecting plate. A lower connecting seat is movably connected to the end of the lower connecting plate. The upper connecting seat is fixed to the surface of the outer support sleeve. The middle connecting seat and the lower connecting seat are fixed to the surface of the inner support sleeve. Tensioning wheels are fixed at both ends of the support plate. There are multiple support plates, which are evenly distributed along the circumference of the inner support sleeve.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. This application, through the built-in ring-cutting unit, allows the cutting machine to penetrate deep into the guardrail steel pipe and complete a ring cut inside the pipe below ground level. This enables the guardrail steel pipe to be separated from the bottom grouting base and pulled out individually, completely avoiding the serious damage to the roadbed caused by pulling up the entire grouting base, and significantly reducing the cost of road reconstruction and expansion; 2. The device in this application uses a quick-release locking unit and a quick-release connecting seat. After the cutting unit is lowered into place, the male and female locking parts can be easily locked to ensure installation efficiency. During disassembly, it can be unlocked simply by pulling the transmission rope, making it easy to quickly remove the built-in ring cutting unit and greatly improving the overall construction efficiency. 3. This application uses an adjusting screw to drive the top clamping seat downwards, squeezing the outer support sleeve. This, in turn, causes multiple support plates with tensioning wheels to open radially via a linkage mechanism, bringing them into close contact with the inner wall of the steel pipe. This design ensures that the hollow guide rod remains centered on the steel pipe, providing a stable rotational reference for the cutting machine. It effectively prevents eccentricity or vibration during cutting, ensuring a smooth and precise cut. 4. This application designs the height adjustment unit, the built-in ring-cutting unit, and the internal support unit as separable main modules. During installation, the height adjustment unit can be placed into the steel pipe first, followed by the installation of the built-in ring-cutting unit, and then the assembly of the internal support unit. This split design makes each individual component lighter and smaller in size when lowered or removed during installation, allowing for easier and more focused docking and locking of each module, thereby improving the overall safety and efficiency of the installation. 5. Simultaneously, after cutting, first, by rotating the adjusting screw to loosen the top clamping seat, the tensioning wheel of the internal support unit can be retracted, allowing it to be removed first. Then, by pulling the transmission rope to unlock the quick-release locking unit, the built-in circumferential cutting unit can be removed separately. Finally, the height adjustment unit can be removed. This step-by-step method is particularly suitable for situations where the steel pipe cut may have slight deformation or contain debris, avoiding the risk of jamming during overall removal. 6. This design also provides a clever integrated removal solution. After cutting, slightly loosen the top clamping seat, and with the quick-release locking unit in the locked state, its main components and height adjustment unit form a single unit. At this point, simply lift the height adjustment unit to remove multiple components simultaneously. After removal, the components are connected as a single unit, avoiding the problem of easy loss or damage when scattered parts are piled up on the construction site. This greatly simplifies the turnover, transportation, and warehousing management of the device, making its movement between multiple construction sites more flexible and efficient. Attached Figure Description

[0018] Figure 1A schematic diagram of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided for this application; Figure 2 A schematic diagram of the internal structure of a quick-release locking unit for a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided for this application; Figure 3 A schematic diagram of the quick-release locking unit of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided for this application; Figure 4 A cross-sectional view of the quick-release locking unit of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided in this application; Figure 5 This application provides a guardrail steel pipe cutting device with a built-in circumferential cutting mechanism. Figure 4 Enlarged structural diagram at point A; Figure 6 A schematic diagram of the internal support unit structure of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided for this application; Figure 7 A cross-sectional view of the internal support unit of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided in this application; Figure 8 This application provides a guardrail steel pipe cutting device with a built-in circumferential cutting mechanism. Figure 7 Enlarged structural diagram at point B; Figure 9 A schematic diagram of the top clamping seat structure of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided for this application; Figure 10 A schematic diagram of the locked state of a quick-release locking unit of a guardrail steel pipe cutting device with a built-in ring cutting mechanism provided for this application; Figure 11 This application provides a schematic diagram of a cutting machine structure for a guardrail steel pipe cutting device with a built-in ring cutting mechanism.

[0019] The image shows: 1. Built-in ring cutting unit; 2. Quick-release locking unit; 3. Height adjustment unit; 4. Quick-release connecting seat; 5. Guardrail steel pipe; 6. Pouring seat; 7. Internal support unit; 11. Fixing ring; 12. Rotary seat; 13. Assembly seat; 14. Cutting machine; 15. Horizontal adjusting screw; 16. Rotary motor; 110. Guide ring; 111. First bevel gear; 112. Second bevel gear; 113. Adjusting motor; 140. Cutting blade; 141. Cutting motor; 142. Motor housing; 143. Magnetic mounting bracket; 145. Panoramic camera; 21. Upper housing; 22. Upper mounting cavity; 23. L-shaped support plate; 24. Locking hook; 25. Transmission arm; 26. Transmission plate; 210. Annular movable groove; 211. Connecting ring; 212. Inner rod; 213. Outer rod; 214. Support spring; 215. Transmission rope; 216. Guide cylinder; 240. Flip-over connecting part; 241. Locking overlapping part; 31. Hollow guide rod; 32. Top clamping seat; 33. Strip groove; 34. Spherical part; 35. Bottom positioning seat; 36. Adjusting screw; 320. Top support; 321. Flip groove; 322. Swing arm; 323. Actuating block; 324. Arc groove; 325. Spring; 350. Bottom support base; 351. Positioning bolt; 41. Lower housing; 42. Lower mounting cavity; 43. Triangular locking block; 44. Locking overlap platform; 45. Clearance ramp; 46. Connecting column; 47. Adjusting block; 71. Inner support sleeve; 72. Outer support sleeve; 73. Support plate; 74. Upper connecting plate; 75. Lower connecting plate; 76. Middle connecting seat; 77. Connecting plate; 78. Upper connecting seat; 79. Lower connecting seat; 710. Annular support protrusion; 711. Return spring; 730. Tensioner. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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.

[0021] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the embodiments of the present invention can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Example

[0025] Please see Figures 1 to 11 The present invention provides a technical solution: a guardrail steel pipe cutting device with a built-in ring cutting mechanism, including a built-in ring cutting unit 1, a quick-release locking unit 2 installed at the bottom of the built-in ring cutting unit 1, a height adjustment unit 3 located in the middle of the quick-release locking unit 2, a quick-release connecting seat 4 corresponding to the quick-release locking unit 2 mounted on the surface of the height adjustment unit 3, a bottom positioning seat 35 and a top pressing seat 32 also provided in the middle of the height adjustment unit 3, and an inner tube support unit 7 sleeved on the surface of the height adjustment unit 3 between the bottom positioning seat 35 and the top pressing seat 32; Because the guardrail steel pipe cutting device of the present invention with a built-in circumferential cutting mechanism has the above structure, it integrates cutting, locking, adjustment and support functions into one unit and realizes separate operation, so that the entire device can be "disassembled into parts" during installation, which greatly reduces the weight and operation difficulty of a single hoisting. Operators can safely and efficiently complete the deployment of the device inside the steel pipe by following the process of "first positioning the height adjustment unit 3, then installing the quick-release locking unit 2, and finally assembling the internal support unit 7", which lays a solid foundation for subsequent precise internal circumferential cutting operations.

[0026] Furthermore, after cutting, the top clamping seat 32 can be loosened first by rotating the adjusting screw 36, allowing the internal support unit 7 to be released from its support and removed first. Then, the quick-release locking unit 2 can be unlocked by pulling the transmission rope 215, allowing the built-in circumferential cutting unit 1 to be removed separately. Finally, the height adjustment unit 3 can be removed. This step-by-step method is particularly suitable for situations where the steel pipe cut may have slight deformation, avoiding the risk of jamming during overall removal.

[0027] Furthermore, this design provides a clever integrated removal solution. After cutting, the top clamping seat 32 is slightly loosened from pressing the internal support unit 7, and with the quick-release locking unit 2 locked, the main components and the height adjustment unit 3 form a single unit. At this point, simply lifting the height adjustment unit 3 allows multiple components to be removed simultaneously. After removal, the components are connected as a single unit, avoiding the problem of easy loss or damage when scattered parts are piled up on the construction site. This greatly simplifies the turnover, transportation, and warehousing management of the device, making its movement between multiple construction sites more flexible and efficient. Example

[0028] The guardrail steel pipe cutting device with a built-in circumferential cutting mechanism provided in Embodiment 1 is further optimized, specifically, as follows: Figure 2 , Figure 8 As shown, the height adjustment unit 3 includes a hollow guide rod 31 inserted into the guardrail steel pipe 5 and an adjusting screw 36 movably connected inside the hollow guide rod 31. The top of the adjusting screw 36 can be set as hexagonal, so that the rotation of the adjusting screw 36 can be achieved by using a hexagonal socket wrench. Both sides of the hollow guide rod 31 are provided with strip grooves 33 that communicate with its interior. The end of the hollow guide rod 31 is threadedly connected to a spherical part 34 that contacts the bottom pouring seat 6 of the guardrail steel pipe 5, so that the spherical part 34 can be disassembled. Since the guardrail steel pipe cutting device with built-in ring cutting mechanism of the present invention has the above structure, the setting of the strip groove 33 in this embodiment not only reduces the overall weight of the hollow guide rod 31, but more importantly, provides movement space for the internal transmission components. Example

[0029] The guardrail steel pipe cutting device with a built-in circumferential cutting mechanism provided in Embodiment 2 is further optimized, specifically, as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 10 As shown, the quick-release locking unit 2 includes an upper housing 21 and an upper mounting cavity 22 opened in the upper housing 21. There are multiple upper mounting cavities 22. In this embodiment, there are four upper mounting cavities 22. The four upper mounting cavities 22 are distributed in a ring at equal intervals inside the upper housing 21. A male locking member is installed in the upper mounting cavity 22. The quick-release connector 4 includes a lower housing 41 and a lower mounting cavity 42 opened in the lower housing 41 and corresponding to the upper mounting cavity 22. The number and position of the lower mounting cavity 42 are the same as those of the upper mounting cavity 22. A female locking member is provided in the lower mounting cavity 42.

[0030] Furthermore, such as Figure 4 and Figure 5As shown, the male locking component includes an L-shaped support plate 23 fixed to both sides of the upper mounting cavity 22 and a locking hook 24 movably connected to the surface of the L-shaped support plate 23. The locking hook 24 can rotate along the connection point of the L-shaped support plate 23 without falling off or shaking. The top of the locking hook 24 extends to one side with a flip-connecting part 240, and the bottom of the locking hook 24 extends to the other side with a locking overlapping part 241. Figure 10 The locking hook 24 and the locking overlap 241 extend in opposite directions.

[0031] The ends of the two flip-connecting parts 240 are hinged with transmission arms 25, and the surfaces of the two transmission arms 25 are movably connected to a transmission plate 26. By pressing or pulling the transmission plate 26, the angle of the two transmission arms 25 can be controlled, thereby locking or unlocking the locking hook 24 below. The upper housing 21 also has an annular movable groove 210 that communicates with the upper mounting cavity 22. A connecting ring 211 is slidably provided in the annular movable groove 210. The connecting ring 211 is fixedly connected to the corresponding transmission plate 26 below. The connecting ring 211 can slide along the height direction of the annular movable groove 210. At the same time, through the action of the connecting ring 211, multiple transmission plates 26 on multiple male locking parts can be connected simultaneously. In this way, multiple male locking parts can be controlled by lifting a single connecting ring 211.

[0032] Furthermore, such as Figure 10 The connecting ring 211 has an inner rod 212 fixed to its top. An outer rod 213 is slidably sleeved on the surface of the inner rod 212. The outer rod 213 can slide relative to the inner rod 212 without falling off. The top of the outer rod 213 is fixed to the top wall of the annular movable groove 210. A support spring 214 is sleeved on the surfaces of both the inner rod 212 and the outer rod 213. The two ends of the support spring 214 are respectively fixed to the top of the corresponding connecting ring 211 and the top wall of the annular movable groove 210. Through the action of the support spring 214, the outer rod 213 and the inner rod 212 can be in a mutually extended state in their natural state. At this time, both the connecting ring 211 and the transmission plate 26 are in the same position. Figure 10 The locked state is shown.

[0033] Furthermore, such as Figure 10The inner rod 212 has a transmission rope 215 fixed at its top end. One end of the transmission rope 215 extends through the upper housing 21 and outwards. A guide cylinder 216 is fixed on the upper housing 21 at the position corresponding to the transmission rope 215. The guide cylinder 216 can partially guide the transmission rope 215. The remaining transmission rope 215 has a certain length for lifting the steel pipe outside during cutting. By lifting the transmission rope 215, the inner rod 212 can be raised, thereby compressing the support spring 214 and raising the connecting ring 211. Thus, the locking hook 24 is unfolded and unlocked by the action of the transmission plate 26. Example

[0034] The guardrail steel pipe cutting device with a built-in circumferential cutting mechanism provided in Embodiment 3 has been further optimized, such as... Figure 4 The female locking component shown includes a triangular locking block 43 fixed in the lower mounting cavity 42. Both sides of the bottom of the triangular locking block 43 have locking engagement platforms 44 that are adapted to the locking engagement portion 241. The top of the triangular locking block 43 has an avoidance slope 45.

[0035] When the quick-release locking unit 2 is lifted by the transmission rope 215 and lowered into the steel pipe along the height adjustment unit 3, the locking component is unlocked by the action of the transmission rope 215, that is, the locking hook 24 is in the unfolded state. The unfolded locking hook 24 finally wraps around the triangular locking block 43. Then, by releasing the transmission rope 215 and the reset action of the support spring 214, the locking hook 24 can be rotated back to its original position, so that it is engaged with the triangular locking block 43. At this time, the connection and locking of the quick-release connecting seat 4 and the quick-release locking unit 2 are completed.

[0036] The device in this application adopts the cooperation of quick-release locking unit 2 and quick-release connecting seat 4. After the quick-release locking unit 2 is lowered into place, the male locking part and the female locking part can be easily locked to ensure the efficiency of installation. When disassembling, it is only necessary to simply pull the transmission rope to unlock, which makes it easy to quickly remove the quick-release locking unit 2 and greatly improves the overall construction efficiency.

[0037] like Figure 2 As shown, a connecting column 46 is fixed to the inner side of the lower housing 41, and an adjusting block 47 is fixed to the lower housing 41 through the connecting column 46. The adjusting block 47 is sleeved on the surface of the hollow guide rod 31, and a fixing bolt is threaded to the surface of the adjusting block 47 for fixing. The height of the adjusting block 47 can be adjusted by rotating the fixing bolt, thereby adjusting the installation height of the quick-release connecting seat 4, and thus adjusting the circumferential cutting height inside the steel pipe according to the actual application. Example

[0038] The guardrail steel pipe cutting device with a built-in circumferential cutting mechanism provided in Embodiment 4 is further optimized, such as... Figure 2 , Figure 6 , Figure 8 and Figure 9 As shown, the bottom positioning seat 35 further includes a bottom support seat 350 sleeved on the surface of the hollow guide rod 31. The outer side of the bottom support seat 350 is threaded with a positioning bolt 351. Rotating the positioning bolt 351 can adjust the height position of the bottom support seat 350 on the surface of the hollow guide rod 31. like Figure 9 The top pressing seat 32 includes a top support seat 320 sleeved on the surface of the hollow guide rod 31. The inner side of the top support seat 320 extends into the hollow guide rod 31 through a strip groove 33 and is threadedly connected to the adjusting screw 36. The top support 320 has flip grooves 321 on both sides. A swing arm 322 is movably connected within the flip groove 321. A toggle block 323 is fixed to the inner end of the swing arm 322. The side wall of the flip groove 321 has an arc-shaped groove 324 concentrically arranged with the swing point of the swing arm 322. One end of the toggle block 323 is slidably disposed within the arc-shaped groove 324. A spring 325 connected to the toggle block 323 is connected within the arc-shaped groove 324. Through the action of the spring 325, the toggle block 323 can naturally form a shape like... Figure 9 In the state shown, the toggle block 323 will not affect the lower part of the quick-release locking unit 2 and the pipe support unit 7, and pressing the toggle block 323 to make it vertical will not affect the removal of the quick-release locking unit 2 and the pipe support unit 7. Example

[0039] The guardrail steel pipe cutting device with a built-in circumferential cutting mechanism provided in Embodiment 5 is further optimized, specifically, as follows: Figure 5 , Figure 11 As shown, the built-in ring cutting unit 1 includes a fixed ring 11 fixed to the top of the upper housing 21 and a rotating seat 12 slidably disposed on the top of the fixed ring 11. An assembly seat 13 is fixed to the top of the rotating seat 12, and a cutting machine 14 is slidably disposed on the top of the assembly seat 13. A horizontal adjusting screw 15 is movably connected inside the assembly seat 13. The bottom of the cutting machine 14 extends into the assembly seat 13 and is threadedly connected to the horizontal adjusting screw 15. A rotary motor 16 connected to the horizontal adjusting screw 15 is fixed to one side of the assembly seat 13. Starting the rotary motor 16 can drive the horizontal adjusting screw 15 to rotate. In this way, through the threaded engagement between the horizontal adjusting screw 15 and the bottom of the cutting machine 14, the position of the cutting machine 14 can be driven horizontally, so that it can contact the inside of the steel pipe to achieve cutting. like Figure 11As shown, the cutting machine 14 includes a cutting blade 140 and a cutting motor 141 connected to the cutting blade 140. A motor housing 142 is mounted on the surface of the cutting motor 141. The motor housing 142 extends into the mounting base 13 and is threadedly connected to the horizontal adjusting screw 15. The motor housing 142 is made of metal and has a magnetic fixing bracket 143 magnetically attached to it. A panoramic camera 145 is mounted on the magnetic fixing bracket 143.

[0040] In this embodiment, the panoramic camera 145 is mounted on the magnetic mounting bracket 143. The panoramic camera 145 is battery-powered and therefore requires no additional power supply. It also provides supplementary lighting. The panoramic camera 145 can assist in observing the cutting environment during cutting. External mobile devices can be connected to the panoramic camera 145 for monitoring and viewing. like Figure 5 As shown, a guide ring 110 is movably provided inside the fixed ring 11. The guide ring 110 can rotate within the fixed ring 11 without shaking or falling off. A first bevel gear 111 is fixed to the top of the guide ring 110, and a second bevel gear 112 meshes with one side of the first bevel gear 111. An adjusting motor 113 connected to the second bevel gear 112 is fixed to the side wall of the fixed ring 11. When the adjusting motor 113 is started, it drives the second bevel gear 112 to rotate actively. The second bevel gear 112 can mesh with the first bevel gear 111 at the bottom and drive the first bevel gear 111 to rotate. The rotating first bevel gear 111 can drive the rotating seat 12 to rotate, thereby adjusting the position of the cutting machine 14 to achieve ring cutting.

[0041] It should be noted that the regulating motor 113, cutting motor 141, and rotary motor 16 in this application are all powered by external wires. The power cords are oil-resistant rubber-sheathed cables with a certain toughness and length, and are loosely fixed to the transmission rope 215 with a spiral spring sheath or elastic band (not shown in the figure; since this is a conventional technical means, it does not need to be further elaborated in this embodiment). Sufficient slack is reserved to ensure that it will not be pulled or tangled when it is raised, lowered, or rotated with the device, and at the same time, to ensure that it does not affect the normal unlocking and locking operation of the quick-release locking unit 2. In addition, the regulating motor 113, rotary motor 16, and cutting motor 141 are all controlled by a portable electrical control box placed outside the guardrail steel pipe 5 (not shown in the figure). The electrical control box is connected to the power cords of each motor through a waterproof plug.

[0042] Because the guardrail steel pipe cutting device with a built-in circumferential cutting mechanism of the present invention has the above structure, the cutting machine 14 can penetrate deep into the guardrail steel pipe 5 through the setting of the built-in circumferential cutting unit 1, and complete the circumferential cutting inside the steel pipe below ground. This allows the guardrail steel pipe to be separated from the bottom grouting seat and pulled out separately, completely avoiding the serious damage to the roadbed caused by pulling up the entire grouting seat together, and significantly reducing the cost of road reconstruction and expansion. Example

[0043] The guardrail steel pipe cutting device with a built-in circumferential cutting mechanism provided in Embodiment 6 is further optimized, specifically, as follows: Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the pipe support unit 7 includes an inner support sleeve 71 and an outer support sleeve 72 sleeved on the surface of the hollow guide rod 31. The outer support sleeve 72 is slidably sleeved on the top of the inner support sleeve 71. The inner diameter of the inner support sleeve 71 is larger than the outer diameter of the top support seat 320. In this way, when the pipe support unit 7 is installed, the inner support sleeve 71 can pass through the top support seat 320.

[0044] The inner support sleeve 71 has an annular support protrusion 710 on its surface near the outer support sleeve 72. A return spring 711 is fitted on the surface of the inner support sleeve 71. The two ends of the return spring 711 are connected to the corresponding annular support protrusion 710 and the end of the outer support sleeve 72, respectively. Through the action of the return spring 711, the inner support sleeve 71 and the outer support sleeve 72 can be in the unfolded state in the natural state. The inner support sleeve 71 has a support plate 73 on one side. The surface of the support plate 73 is hinged with an upper connecting plate 74 and a lower connecting plate 75. One end of the upper connecting plate 74 is movably connected to a middle connecting seat 76. The middle part of the upper connecting plate 74 is hinged to a connecting plate 77. The end of the connecting plate 77 is movably connected to an upper connecting seat 78. The end of the lower connecting plate 75 is movably connected to a lower connecting seat 79. The upper connecting seat 78 is fixed to the surface of the outer support sleeve 72. The middle connecting seat 76 and the lower connecting seat 79 are fixed to the surface of the inner support sleeve 71. Both ends of the support plate 73 are fixed with tensioning wheels 730. There are multiple support plates 73, which are evenly distributed along the circumference of the inner support sleeve 71.

[0045] Because the guardrail steel pipe cutting device with built-in ring cutting mechanism of the present invention has the above structure, the screw rod 36 can be rotated to form a threaded connection with the top support seat 320. This allows the top support seat 320 to slide along the height direction of the hollow guide rod 31, thereby pressing the swing arms 322 on both sides of the top support seat 320 against the top of the outer support sleeve 72. Since the swing arms 322 are restricted by the arc groove 324 and cannot be fully closed upwards, the outer support sleeve 72 can be slid towards the inner support sleeve 71, causing the connecting plate 77 to unfold. After the connecting plate 77 unfolds, it can be pushed outward by the action of the upper connecting plate 74, and the lower connecting plate 75 also unfolds simultaneously, ultimately causing the tensioning wheel 730 to come into close contact with the inner wall of the steel pipe.

[0046] This design ensures that the hollow guide rod 31 is always in the center of the steel pipe, providing a stable rotation reference for the cutting machine. It effectively prevents eccentricity or vibration during the cutting operation, ensuring a smooth and precise cut. Furthermore, the linkage mechanism ensures that multiple tensioning wheels 730 expand radially synchronously and with equal force, thereby achieving precise automatic centering and avoiding tilting of the guide rod due to uneven force.

[0047] In summary, the steps for using this application are as follows: Step 1: Place and position the height adjustment unit: Adjust the position of the bottom positioning seat 35 on the hollow guide rod 31 according to the required cutting depth, and fix it by tightening the positioning bolt 351. Then, rotate the adjusting block 47 to adjust the height of the quick-release connecting seat 4. This step sets the reference height for pipe support and cutting. Then, slowly lower the hollow guide rod 31 until its spherical end 34 contacts the pre-embedded pouring seat 6 at the bottom of the steel pipe. The spherical design can adapt to uneven surfaces, completing the initial centering and bottom positioning of the device.

[0048] Step 2: Install and lock the built-in ring-cutting unit: Pull the transmission rope 215 upwards by hand. At this time, the male locking component (locking hook 24) inside the quick-release locking unit 2 is in the open state (unlocked state). Lower the entire built-in ring cutting unit 1 along the hollow guide rod 31 to the predetermined cutting height. Since both the quick-release locking unit 2 and the built-in ring cutting unit 1 have cavities, they can pass smoothly through the top pressing seat 32 and the bottom positioning seat 35 without creating any movement obstacles.

[0049] After being lowered into place, slowly release the transmission rope 215. Under the reset action of the support spring 214, the locking hook 24's locking overlap 241 will automatically engage with the locking overlap platform 44 of the triangular locking block 43 in the lower mounting cavity 42 of the quick-release connector 4. When you hear a "click" or feel obvious resistance, it means that the locking is complete. At this time, the built-in ring cutting unit 1 has been firmly locked in the preset position.

[0050] Step 3: Assemble and tighten the inner tube support unit: The inner support unit 7 (inner support sleeve 71 and outer support sleeve 72 assembly) is inserted into the hollow guide rod 31 from above, so that it sits on the fixed bottom positioning seat 35. During the insertion process, the bottom of the inner support sleeve 71 will abut against the surface of the swing arm 322. The swing arm 322, which is subjected to the abutment, will overcome the supporting force of the spring 325 and swing downward, causing the actuating block 323 to slide along the arc groove 324. Finally, the swing arm 322 swings to a vertical state. In the vertical state, the inner support sleeve 71 and the outer support sleeve 72 can pass smoothly. In actual applications, if the operating space allows, the inner support unit 7 can be lowered and raised manually. If the space is insufficient, ropes can be tied to the inner support unit 7 to achieve a steady lowering or raising.

[0051] The externally rotating adjusting screw 36 can be configured with a hexagonal top, allowing the adjustment screw 36 to be rotated using a hexagonal wrench. The rotation of the adjusting screw 36 will drive the top pressing seat 32 (top support seat 320) connected to it to move downward along the hollow guide rod 31. When the top pressing seat 32 is pressed down, the swing arms 322 on both sides will first press against the top of the outer support sleeve 72. The swing arms 322 are unable to swing upward further due to the action of the arc groove 324. At this time, the outer support sleeve 72 can be forced to move downward along the inner support sleeve 71, compressing the return spring 711.

[0052] The downward movement of the outer support sleeve 72, through a series of linkage mechanisms including the upper connecting seat 78, connecting plate 77, upper connecting plate 74, middle connecting seat 76, lower connecting plate 75, and lower connecting seat 79, converts the axial pressure into radial expansion force. This force pushes multiple support plates 73 and their tensioning wheels 730 at both ends to open outwards evenly until they are in close contact with the inner wall of the guardrail steel pipe 5. Rotation stops when the resistance of the rotating adjusting screw 36 increases significantly. At this point, the entire device achieves precise centering and stable fixation within the steel pipe through multi-point radial support, preparing it for cutting.

[0053] Then, the adjusting motor 113 is started to drive the second bevel gear 112 to rotate. The second bevel gear 112 drives the guide ring 110 to rotate through the first bevel gear 111, thereby adjusting the position of the cutting machine 14 in the horizontal circumferential direction. The rotating motor 16 is started to drive the horizontal adjusting screw 15 to rotate. Through the threaded engagement between the horizontal adjusting screw 15 and the motor housing 142, the motor housing 142 and the cutting motor 141 on it can be driven to slide along the length direction of the mounting base 13 for horizontal cutting adjustment. Then, the cutting motor 141 is started so that its output end drives the cutting blade 140 to realize the cutting operation.

[0054] During the cutting process, a panoramic camera 145 can be used for auxiliary viewing, as well as external lighting equipment. Additionally, an external negative pressure fan can be inserted into the steel pipe to achieve ventilation, which not only cools and dissipates heat but also cleans up smoke and dust, resulting in higher clarity.

[0055] In summary, the disassembly steps after using this application are as follows: Option 1: Step-by-step disassembly (suitable for complex working conditions or routine maintenance). This option can effectively deal with the deformation that may occur at the cut end of the steel pipe or the presence of foreign objects inside after cutting.

[0056] Disassembling the internal support unit: Rotate the adjusting screw 36 in the reverse direction to drive the top clamping seat 32 upward, releasing the pressure on the outer support sleeve 72 until the top clamping seat 32 can be touched by hand. At this time, under the action of the return spring 711, the tension wheel 730 will retract and return to its original position, disengaging from the inner wall of the steel pipe. Subsequently, the entire internal support unit 7 can be removed from the steel pipe. During removal, the swing arm 322 can be manually swung to allow the internal support unit 7 to pass smoothly without obstruction.

[0057] To remove the built-in ring-cutting unit: Pull the drive rope 215 upwards to unlock the quick-release locking unit 2. While keeping it pulled, lift the built-in ring-cutting unit 1 upwards along the hollow guide rod 31 until it is completely removed from the steel tube.

[0058] Remove the height adjustment unit: Finally, pull the hollow guide rod 31 directly out of the guardrail steel pipe 5 to complete the disassembly.

[0059] Option 2: Integrated synchronous retrieval (suitable for equipment in good working condition and requiring rapid turnover) This option is efficient and facilitates rapid transfer and storage of equipment.

[0060] After the cutting is completed, rotate the adjusting screw 36 times in the opposite direction to release the locking of the inner tube support unit 7, and ensure that the quick-release locking unit 2 is in the locked state. At this time, the height adjustment unit 3, the built-in ring cutting unit 1 (locked by the quick-release locking unit 2 and the quick-release connecting seat 4) and the inner tube support unit 7 are mechanically connected into a whole.

[0061] By simply lifting the hollow guide rod 31 of the height adjustment unit 3 upwards, the three main modules can be removed from the steel pipe simultaneously and in one go. After removal, the device remains in an integrated connection state, which greatly facilitates transportation and storage and avoids the scattering and loss of parts.

[0062] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A guardrail steel pipe cutting device with a built-in circumferential cutting mechanism, characterized in that, It includes a built-in ring-cutting unit (1), a quick-release locking unit (2) is installed at the bottom of the built-in ring-cutting unit (1), a height adjustment unit (3) is provided in the middle of the quick-release locking unit (2), a quick-release connecting seat (4) corresponding to the quick-release locking unit (2) is assembled on the surface of the height adjustment unit (3), a bottom positioning seat (35) and a top pressing seat (32) are also provided in the middle of the height adjustment unit (3), and an inner tube support unit (7) sleeved on the surface of the height adjustment unit (3) is provided between the bottom positioning seat (35) and the top pressing seat (32). The height adjustment unit (3) includes a hollow guide rod (31) inserted into the guardrail steel pipe (5) and an adjusting screw (36) movably connected inside the hollow guide rod (31). Both sides of the hollow guide rod (31) are provided with strip grooves (33) that communicate with each other inside. The end of the hollow guide rod (31) is threaded with a spherical part (34) that contacts the bottom pouring seat (6) of the guardrail steel pipe (5). The quick-release locking unit (2) includes an upper housing (21) and an upper mounting cavity (22) opened in the upper housing (21), and a male locking member is installed in the upper mounting cavity (22); The quick-release connector (4) includes a lower housing (41) and a lower mounting cavity (42) opened in the lower housing (41) and corresponding to the upper mounting cavity (22) above. A female locking member is provided in the lower mounting cavity (42). The male locking component includes an L-shaped support plate (23) fixed to both sides of the upper mounting cavity (22) and a locking hook (24) movably connected to the surface of the L-shaped support plate (23). The top of the locking hook (24) extends to one side with a flip-connecting part (240), and the bottom of the locking hook (24) extends to the other side with a locking overlapping part (241). The female locking component includes a triangular locking block (43) fixed in the lower mounting cavity (42). Both sides of the bottom of the triangular locking block (43) have locking overlap platforms (44) that are adapted to the locking overlap portion (241). The top of the triangular locking block (43) has an avoidance slope (45).

2. The guardrail steel pipe cutting device with a built-in ring cutting mechanism according to claim 1, characterized in that, The ends of the two flip-connecting parts (240) are hinged with transmission arms (25), and the surfaces of the two transmission arms (25) are movably connected to a transmission plate (26). The upper housing (21) is also provided with an annular movable groove (210) communicating with the upper mounting cavity (22). A connecting ring (211) is slidably provided in the annular movable groove (210), and the connecting ring (211) is fixedly connected to the corresponding transmission plate (26) below.

3. A guardrail steel pipe cutting device with a built-in circumferential cutting mechanism according to claim 2, characterized in that, An inner rod (212) is fixed to the top of the connecting ring (211). An outer rod (213) is slidably sleeved on the surface of the inner rod (212). The top end of the outer rod (213) is fixed to the top wall of the annular movable groove (210). A support spring (214) is sleeved on the surfaces of the inner rod (212) and the outer rod (213). The two ends of the support spring (214) are respectively fixed to the top of the corresponding connecting ring (211) and the top wall of the annular movable groove (210). A transmission rope (215) is fixed to the top end of the inner rod (212). The transmission rope (215) extends through the upper shell (21) to the outside. A guide cylinder (216) is fixed on the upper shell (21) at the position corresponding to the transmission rope (215).

4. A guardrail steel pipe cutting device with a built-in ring cutting mechanism according to claim 3, characterized in that, The built-in ring cutting unit (1) includes a fixed ring (11) fixed to the top of the upper housing (21) and a rotating seat (12) slidably disposed on the top of the fixed ring (11). An assembly seat (13) is fixed to the top of the rotating seat (12). A cutting machine (14) is slidably disposed on the top of the assembly seat (13). A horizontal adjusting screw (15) is movably connected inside the assembly seat (13). The bottom of the cutting machine (14) extends into the assembly seat (13) and is threadedly connected to the horizontal adjusting screw (15). A rotary motor (16) is fixed on one side of the assembly seat (13) and is drivenly connected to the horizontal adjusting screw (15). The fixed ring (11) has a guide ring (110) inside, a first bevel gear (111) is fixed on the top of the guide ring (110), a second bevel gear (112) meshes on one side of the first bevel gear (111), and an adjustment motor (113) connected to the second bevel gear (112) is fixed on the side wall of the fixed ring (11).

5. A guardrail steel pipe cutting device with a built-in ring cutting mechanism according to claim 1, characterized in that, A connecting column (46) is fixed to the inner side of the lower housing (41). An adjusting block (47) is fixed to the lower housing (41) through the connecting column (46). The adjusting block (47) is sleeved on the surface of the hollow guide rod (31). A fixing bolt is threaded onto the surface of the adjusting block (47) for fixing it.

6. A guardrail steel pipe cutting device with a built-in circumferential cutting mechanism according to claim 1, characterized in that, The bottom positioning seat (35) includes a bottom support seat (350) sleeved on the surface of the hollow guide rod (31), and a positioning bolt (351) is threadedly connected to the outer side of the bottom support seat (350). The top pressing seat (32) includes a top support seat (320) sleeved on the surface of the hollow guide rod (31). The inner side of the top support seat (320) extends into the hollow guide rod (31) through a strip groove (33) and is threadedly connected to the adjusting screw (36). The top support (320) has a flip groove (321) on both sides. A swing arm (322) is movably connected in the flip groove (321). A toggle block (323) is fixed at the inner end of the swing arm (322). The side wall of the flip groove (321) has an arc groove (324) that is concentric with the swing point of the swing arm (322). One end of the toggle block (323) is slidably disposed in the arc groove (324). A spring (325) connected to the toggle block (323) is connected in the arc groove (324).

7. A guardrail steel pipe cutting device with a built-in circumferential cutting mechanism according to claim 6, characterized in that, The tube support unit (7) includes an inner support sleeve (71) and an outer support sleeve (72) sleeved on the surface of the hollow guide rod (31). The outer support sleeve (72) is slidably sleeved on the top of the inner support sleeve (71). The inner diameter of the inner support sleeve (71) is larger than the outer diameter of the top support seat (320).

8. A guardrail steel pipe cutting device with a built-in circumferential cutting mechanism according to claim 7, characterized in that, The inner support sleeve (71) has an annular support protrusion (710) near the outer support sleeve (72) on its surface. A return spring (711) is sleeved on the surface of the inner support sleeve (71). The two ends of the return spring (711) are respectively connected to the corresponding annular support protrusion (710) and the end of the outer support sleeve (72). The inner support sleeve (71) has a support plate (73) on one side. The surface of the support plate (73) is hinged with an upper connecting plate (74) and a lower connecting plate (75). One end of the upper connecting plate (74) is movably connected to a middle connecting seat (76). The middle part of the upper connecting plate (74) is hinged to a connecting plate (77). The end of the connecting plate (77) is movably connected to an upper connecting seat (78). The end of the lower connecting plate (75) is movably connected to a lower connecting seat (79). The upper connecting seat (78) is fixed to the surface of the outer support sleeve (72). The middle connecting seat (76) and the lower connecting seat (79) are fixed to the surface of the inner support sleeve (71). Both ends of the support plate (73) are fixed with tensioning wheels (730). There are multiple support plates (73), and the multiple support plates (73) are evenly distributed along the circumferential direction of the inner support sleeve (71).

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