A cutting machine for cutting a seamless steel pipe for nuclear power with adjustable cutting angle

Abstract

The application discloses a seamless steel pipe cutting machine with adjustable cutting angle for nuclear power, which comprises a rack, a supporting assembly fixedly arranged in the rack, and a clamping assembly fixedly arranged on the top of the supporting assembly. The clamping assembly is used for fixing the seamless steel pipe at multiple positions through the supporting assembly. The application relates to the technical field of steel pipe cutting. The seamless steel pipe cutting machine with adjustable cutting angle for nuclear power is characterized in that when the cleaning moving piece moves, the bottom scraping sheet of the cleaning moving piece is in frictional contact with the surface of the guide rail, so that the iron filings, dust and other impurities on the guide rail can be scraped off. Meanwhile, the magnetic stripe on the surface of the scraping sheet can attract the small metal scraps. When the cleaning moving piece moves with the clamping assembly, the guide rail impurities can be automatically cleaned through the scraping sheet and the magnetic stripe. In this way, the guide rail is prevented from being abraded or the sliding precision is prevented from being affected, the equipment maintenance frequency is reduced, and the requirement of long-period stable operation of the nuclear power equipment is met.

Description

Technical Field

[0001] This invention relates to the field of steel pipe cutting technology, specifically to a seamless steel pipe cutting machine for nuclear power plants with an adjustable cutting angle. Background Technology

[0002] Seamless steel pipes for nuclear power are key components of core equipment such as nuclear reactor loops and steam generators. Their processing precision and dimensional consistency directly affect the operational safety and stability of nuclear power equipment.

[0003] Chinese Patent Publication No. CN106270724A discloses a steel pipe cutting machine. This device, through the cooperation of a slide bar and two sliding devices, can adjust the distance between two fixed devices. By setting the fixed devices, the distance between two first clamping rods and a second clamping rod can be adjusted, enabling the steel pipe cutting machine to cut steel pipes of different diameters, thereby improving its practicality. However, after long-term use, the guide rail of the aforementioned device is prone to accumulating impurities such as iron filings and dust. If not cleaned in time, this can lead to jamming of the clamping components, decreased positioning accuracy, and consequently, affect the cutting quality. During the cutting operation, the clamping components of traditional cutting machines often have rigid contact with the outer wall of the steel pipe, resulting in uneven clamping force distribution. This easily leads to scratches, indentations, and other damage on the surface of the steel pipe. The high surface quality requirements for nuclear power steel pipes mean that such damage directly affects the product qualification rate. Furthermore, iron filings and other debris that splash during the cutting process of traditional cutting equipment can easily get stuck in the cutting blade connection position, causing wear on the cutting blade. Summary of the Invention

[0004] To solve the above technical problems, the present invention is achieved through the following technical solution: a seamless steel pipe cutting machine for nuclear power with adjustable cutting angle, comprising: a frame, a support component fixedly installed inside the frame, a clamping component fixedly installed on the top of the support component, and the clamping component fixing the seamless steel pipe at multiple points through the support component;

[0005] A guide frame, on the top of which a cutting assembly is mounted, the cutting assembly being mounted above the frame via the guide frame;

[0006] The support assembly includes a guide rail, an assembly frame fixedly mounted on the top side of the guide rail, and fastening clamps fixedly mounted on the surface of the assembly frame. Drive screws are driven to both sides of the outer surface of the guide rail. A cleaning moving component is driven to the top of the guide rail via the drive screws and is fixedly mounted on the bottom of the clamping assembly. The assembly frame is fixed to the top side of the guide rail, and its fastening clamps are used to clamp the ends of the seamless steel pipe. This, in conjunction with the clamping assembly, forms a multi-position fixation at the middle of both ends, solving the problem of easy shaking when clamping long-length seamless steel pipes for nuclear power plants and preventing axial movement of the steel pipe during cutting, thus providing a stable foundation for high-precision cutting. The drive screws are driven to both sides of the outer surface of the guide rail, and the guide blocks of the cleaning moving component are threadedly connected to the drive screws. When the drive screws are activated, they drive the guide blocks to slide along the guide rail.

[0007] Preferably, the guide rail is fixedly installed inside the frame, and two sets of cleaning moving parts are provided, both sets of which are slidably adapted to the surface of the guide rail.

[0008] Preferably, the cleaning moving component includes a fixed frame, of which two fixed frames are provided. A guide block is fixedly installed between the opposing surfaces of the two fixed frames. A guide wheel is rotatably installed on one side of the outer surface of the guide block. A scraper is fixedly installed on the bottom of both the fixed frame and the guide block, and a magnetic strip is fixedly installed on the surface of the scraper. The fixed frames of the cleaning moving component are fixed to both sides of the bottom of the clamping assembly. Therefore, the sliding of the guide block will synchronously drive the clamping assembly and the fixed steel pipe to move along the guide rail, realizing the adjustment of the relative position of the steel pipe and the cutting assembly, and adapting to the cutting needs of steel pipes of different lengths. When the cleaning moving component moves, the scraper at its bottom makes frictional contact with the surface of the guide rail, which can scrape off impurities such as iron filings and dust on the guide rail. At the same time, the magnetic strip on the surface of the scraper will attract fine metal debris. As the cleaning moving component moves with the clamping assembly, the scraper and magnetic strip automatically clean the impurities on the guide rail, avoiding wear of the guide rail or affecting the sliding accuracy, reducing the frequency of equipment maintenance, and adapting to the requirements of long-term stable operation of nuclear power equipment.

[0009] Preferably, the fixing frame is fixedly installed on both sides of the bottom of the clamping assembly, the scraper is frictionally adapted to the surface of the guide rail, the guide block is driven and installed on the surface of the drive screw, and the guide wheel is slidably installed on the side of the frame. The guide wheel on the side of the guide block slides against the side of the frame, assisting in maintaining smooth sliding of the cleaning moving parts and reducing frictional resistance during movement.

[0010] Preferably, the clamping assembly includes a support frame, a base frame fixedly mounted on the top of the support frame, a rotating frame rotatably mounted on the surface of the base frame, a screw fixedly mounted inside the base frame, and sleeve blocks fixedly mounted on the surfaces of both the base frame and the rotating frame. An adjusting clamping group is internally mounted in each sleeve block. The operator adjusts the angle between the rotating frame and the base frame by rotating the rotating frame, thereby changing the position of the seamless steel pipe placed between them, thus achieving initial adjustment of the cutting angle. After the angle is adjusted to the correct position, the screw penetrating the base frame is tightened, using the screw's threaded locking force to fix the position of the base frame and the rotating frame. This achieves free adjustment and precise fixing of the cutting angle, solving the problem of easy loosening after angle adjustment in traditional cutting machine clamping assemblies, avoiding angle deviation during subsequent clamping and cutting processes, and meeting the cutting requirements of different bevel angles for nuclear power seamless steel pipes.

[0011] Preferably, the support frame is fixedly installed between the opposite faces of the fixed frame, the base frame and the rotating frame are connected by screw threads, and three sleeve blocks are provided, which are distributed in a triangular shape on the surfaces of the base frame and the rotating frame, and both the base frame and the rotating frame are hollow structures. The three triangularly distributed sleeve blocks and the adjusting clamping group form a multi-point clamping structure, which significantly improves the coaxiality and stability of the steel pipe clamping compared with the traditional two-point clamping, avoids the cutting deviation caused by the steel pipe shaking under force during the cutting process, and ensures the cutting accuracy of nuclear power steel pipes.

[0012] Preferably, the adjusting clamp assembly includes a center rod, with a clamping strip fixedly installed at the end of the center rod. The clamping strip has an internal compression groove. Fixing blocks are fixedly installed on both sides of the outer surface of the clamping strip. Clamping rods are rotatably installed on the surfaces of the fixing blocks. Extension rods are rotatably installed inside the clamping rods. A positioning plate is rotatably installed between the opposite faces of the extension rods. The positioning plate is fitted onto the surface of the center rod. A handle is rotatably installed on the surface of the center rod near the positioning plate. The operator rotates the handle to move the center rod. Through the transmission of the extension rod and clamping rod, the clamping strip is pushed closer to the surface of the steel pipe. When the clamping strip first contacts the steel pipe, the flexible segmented structure begins to initially conform to the outer contour of the steel pipe. The operator continues to tighten the handle to increase the clamping force. Each segment of the clamping strip is compressed by the outer wall of the steel pipe, undergoing flexible deformation radially. Simultaneously, the compression groove contracts due to the force, providing allowance for the deformation of the segmented structure, allowing the clamping strip to fully conform to the outer wall of the steel pipe, forming a stable surface contact clamping. During the cutting process, the steel pipe may experience slight vibrations due to the cutting force. The flexible structure of the clamping bar can buffer the vibration impact, and the elastic restoring force of the extrusion groove can maintain stable clamping force, preventing the clamp from loosening due to vibration. Reversing the throttle to loosen the adjusting clamp group causes the flexible structure of the clamping bar to automatically spring back and reset, and the extrusion groove reopens, disengaging from the outer wall of the steel pipe, making it easy to remove the processed steel pipe.

[0013] Preferably, the extension rod passes through the inside of the sleeve block, and the end of the clamping rod away from the fixed block is rotatably connected to the sleeve block. The clamping bar is configured as a segmented flexible structure. The segmented flexible structure of the clamping bar can elastically deform along the outer contour of the steel pipe, and in conjunction with the expansion and contraction allowance of the extrusion groove, it forms multi-point contact with the outer wall of the steel pipe. When the extrusion groove is subjected to clamping force, it will undergo slight contraction, so that each segment is tightly attached to the surface of the steel pipe, increasing the friction. Compared with the line contact of the rigid clamping bar, the surface contact clamping method can effectively prevent the steel pipe from axial movement or radial displacement, ensuring cutting accuracy. Nuclear power seamless steel pipes have strict requirements for surface quality. The flexible structure can buffer and adjust the locking force of the clamping group, and the extrusion groove further disperses local pressure, avoiding scratches and indentations on the steel pipe surface caused by rigid clamping, meeting the processing quality standards of nuclear power equipment. In addition, the extrusion groove can serve as a chip discharge channel. If small iron chips generated during the cutting process fall onto the clamping surface, they can be discharged through the extrusion groove, preventing impurities from being trapped between the clamping bar and the steel pipe and affecting the clamping accuracy.

[0014] Preferably, the cutting assembly includes a positioning frame, which is slidably mounted on the surface of a guide frame. A motion guide seat is fixedly mounted on the outer surface of the positioning frame, and a mounting seat is fixedly mounted on the bottom of the motion guide seat. A cutting head is fixedly mounted inside the mounting seat. The positioning frame is slidably mounted on the surface of the guide frame, which provides a moving support track for the cutting assembly. According to the cutting position requirements of the seamless steel pipe, the positioning frame can slide horizontally along the guide frame, driving the entire cutting assembly to adjust its position to adapt to the processing requirements of different pipe diameters and different cutting points. The motion guide seat is fixedly mounted on the outer surface of the positioning frame and has a vertical driving function, which can drive the mounting seat and the cutting head at the bottom to move up and down, thereby adjusting the distance between the cutting head and the surface of the steel pipe. The mounting seat is fixed at the bottom of the motion guide seat and is used to support the cutting head. After the clamping assembly completes the angle adjustment and clamping of the steel pipe, the spatial position of the cutting head is precisely adjusted by the lateral sliding of the positioning frame and the vertical lifting of the motion guide seat, so that the working center of the cutting head is aligned with the preset cutting line of the steel pipe, ensuring that the cutting trajectory is accurate.

[0015] Preferably, the cutting head includes a shaft, inside which a cutting blade is fixedly mounted. A separator ring is fitted onto the surface of the cutting blade, and an inclined block is fixedly mounted at the bottom of the separator ring. The inclined blocks are distributed circumferentially on the surface of the separator ring. After the cutting operation starts, the shaft, as the power transmission component of the cutting head, drives the cutting blade to cut the steel pipe. The separator ring, fitted onto the surface of the cutting blade, serves to separate external impurities and prevent flying iron filings and other debris from getting stuck in the connection position of the cutting blade during the cutting process. The circumferentially distributed inclined blocks and separator ring effectively prevent impurities from entering the cutting blade, further improving the cutting accuracy and smoothness of the seamless steel pipe for nuclear power plants.

[0016] This invention provides a seamless steel pipe cutting machine for nuclear power plants with an adjustable cutting angle. It has the following advantages:

[0017] (i) The nuclear power seamless steel pipe cutting machine with adjustable cutting angle, when the cleaning moving part moves, the scraper at the bottom of the scraper comes into contact with the guide rail surface to scrape off iron filings, dust and other impurities on the guide rail. At the same time, the magnetic strip on the surface of the scraper will attract fine metal debris. When the cleaning moving part moves with the clamping assembly, the scraper and magnetic strip automatically clean the impurities on the guide rail, avoiding impurities from wearing the guide rail or affecting the sliding accuracy, reducing the frequency of equipment maintenance, and adapting to the requirements of long-term stable operation of nuclear power equipment.

[0018] (II) This nuclear power seamless steel pipe cutting machine with adjustable cutting angle allows the operator to adjust the angle between the rotating frame and the base frame by rotating the rotating frame, thereby changing the position of the seamless steel pipe placed between the two and achieving initial adjustment of the cutting angle. After the angle is adjusted to the correct position, the screw that runs through the base frame is tightened, and the position of the base frame and the rotating frame is fixed by the thread locking force of the screw. This achieves free adjustment and precise fixation of the cutting angle, solving the problem of easy loosening of the clamping components after the angle of traditional cutting machines is adjusted, avoiding angle deviation during subsequent clamping and cutting, and meeting the cutting requirements of different bevel angles for nuclear power seamless steel pipes.

[0019] (III) This nuclear power seamless steel pipe cutting machine with adjustable cutting angle utilizes the radial flexible deformation of each segment of the clamping bar under the pressure of the outer wall of the steel pipe. Simultaneously, the compression groove contracts under pressure, providing allowance for the deformation of the segmented structure, ensuring complete contact between the clamping bar and the outer wall of the steel pipe, forming a stable surface contact clamping. During the cutting process, the steel pipe may experience slight vibrations due to the cutting force. The flexible structure of the clamping bar can buffer the vibration impact, and the elastic restoring force of the compression groove can maintain stable clamping force, preventing loosening due to vibration.

[0020] (iv) This adjustable-angle seamless steel pipe cutting machine for nuclear power plants meets the stringent surface quality requirements of seamless steel pipes used in nuclear power plants. Its flexible structure buffers the locking force of the adjustable clamping assembly, while the extrusion groove further disperses local pressure, preventing scratches and indentations on the steel pipe surface caused by rigid clamping, thus meeting the processing quality standards for nuclear power equipment. Furthermore, the extrusion groove serves as a debris discharge channel; if small iron filings generated during the cutting process fall onto the clamping surface, they can be discharged through the extrusion groove, preventing impurities from being trapped between the clamping bars and the steel pipe and affecting clamping accuracy.

[0021] (V) This nuclear power seamless steel pipe cutting machine with adjustable cutting angle, after starting the cutting operation, uses the shaft as the power transmission component of the cutting head to drive the cutting blade to cut the steel pipe. The separator ring is fitted on the surface of the cutting blade to separate external impurities and prevent iron filings and other debris from getting stuck in the cutting blade connection position during the cutting process. The circumferentially distributed inclined blocks and separator ring effectively block impurities from entering the cutting blade, further improving the cutting accuracy and smoothness of the nuclear power seamless steel pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the support component and the clamping component of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the support component of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the cleaning moving part and clamping assembly of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the cleaning moving part of the present invention;

[0027] Figure 6 This is a schematic diagram of the disassembled structure of the clamping component of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the adjusting clamp assembly of the present invention;

[0029] Figure 8 This is a schematic diagram of the cutting assembly and guide frame of the present invention;

[0030] Figure 9 This is a schematic diagram of the cutting assembly of the present invention;

[0031] Figure 10 This is a schematic diagram of the cutting head of the present invention.

[0032] In the diagram: 1. Frame; 2. Clamping assembly; 21. Rotating frame; 22. Base frame; 23. Sleeve block; 24. Support frame; 25. Adjusting clamp assembly; 251. Center rod; 252. Clamping bar; 253. Extrusion groove; 254. Fixing block; 255. Clamping rod; 256. Extension rod; 257. Positioning plate; 258. Rotary handle; 26. Screw; 3. Support assembly; 31. Fastening clamp; 32. Cleaning moving part; 321. Fixing frame; 322. Guide wheel; 323. Guide block; 324. Magnetic strip; 325. Scraper; 33. Guide rail; 34. Drive screw; 35. Assembly frame; 4. Cutting assembly; 41. Motion guide seat; 42. Positioning frame; 43. Mounting seat; 44. Cutting head; 441. Shaft; 442. Inclined block; 443. Cutting blade; 444. Separator ring; 5. Guide frame. Detailed Implementation

[0033] 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.

[0034] First embodiment, such as Figures 1 to 5 As shown, the present invention provides a technical solution: a seamless steel pipe cutting machine for nuclear power with adjustable cutting angle, comprising: a frame 1, a support component 3 fixedly installed inside the frame 1, a clamping component 2 fixedly installed on the top of the support component 3, and the clamping component 2 fixing the seamless steel pipe at multiple points through the support component 3;

[0035] The guide frame 5 has a cutting assembly 4 mounted on its top, and the cutting assembly 4 is mounted above the frame 1 via the guide frame 5.

[0036] The support assembly 3 includes a guide rail 33, with an assembly frame 35 fixedly installed on the top side of the guide rail 33. A fastening clamp 31 is fixedly installed on the surface of the assembly frame 35. Drive screws 34 are driven to both sides of the outer surface of the guide rail 33. A cleaning moving part 32 is driven to the top of the guide rail 33 via the drive screws 34 and is fixedly installed at the bottom of the clamping assembly 2. The assembly frame 35 is fixed to the top side of the guide rail 33, and its fastening clamps 31 are used to clamp the ends of the seamless steel pipe. This, in conjunction with the clamping assembly 2, forms a multi-position fixation at the middle of both ends, solving the problem of easy shaking when clamping long-length seamless steel pipes for nuclear power plants and preventing axial movement of the steel pipe during cutting, thus providing a stable foundation for high-precision cutting. The drive screws 34 are driven to both sides of the outer surface of the guide rail 33. The guide block 323 of the cleaning moving part 32 is threadedly connected to the drive screw 34. When the drive screw 34 is activated, it drives the guide block 323 to slide along the guide rail 33.

[0037] Preferably, the guide rail 33 is fixedly installed inside the frame 1, and two sets of cleaning moving parts 32 are provided, both sets of cleaning moving parts 32 being slidably adapted to the surface of the guide rail 33.

[0038] Preferably, the cleaning moving component 32 includes a fixed frame 321, of which two fixed frames 321 are provided. A guide block 323 is fixedly installed between the opposing surfaces of the two fixed frames 321. A guide wheel 322 is rotatably installed on one side of the outer surface of the guide block 323. A scraper 325 is fixedly installed on the bottom of both the fixed frame 321 and the guide block 323. A magnetic strip 324 is fixedly installed on the surface of the scraper 325. The fixed frames 321 of the cleaning moving component 32 are fixed to both sides of the bottom of the clamping assembly 2. Therefore, the sliding of the guide block 323 will synchronously drive the clamping assembly 2 and the fixed steel pipe to move along the guide rail 33, realizing the adjustment of the relative position of the steel pipe and the cutting assembly 4, and adapting to the cutting needs of steel pipes of different lengths. When the cleaning moving part 32 moves, the scraper 325 at its bottom comes into frictional contact with the surface of the guide rail 33, which can scrape off impurities such as iron filings and dust on the guide rail 33. At the same time, the magnetic strip 324 on the surface of the scraper 325 will attract fine metal debris. When the cleaning moving part 32 moves with the clamping assembly 2, the scraper 325 and magnetic strip 324 automatically clean the impurities on the guide rail 33, avoiding the wear of impurities on the guide rail 33 or affecting the sliding accuracy, reducing the frequency of equipment maintenance, and adapting to the requirements of long-term stable operation of nuclear power equipment.

[0039] Preferably, the fixing frame 321 is fixedly installed on both sides of the bottom of the clamping assembly 2, the scraper 325 is frictionally adapted to the surface of the guide rail 33, the guide block 323 is drivenly installed on the surface of the drive screw 34, and the guide wheel 322 is slidably installed on the side of the frame 1. The guide wheel 322 on the side of the guide block 323 slides against the side of the frame 1, helping the cleaning moving part 32 to maintain smooth sliding and reducing frictional resistance during movement.

[0040] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figure 4 , Figure 6 and Figure 7 As shown, preferably, the clamping assembly 2 includes a support frame 24, a base frame 22 is fixedly mounted on the top of the support frame 24, a rotating frame 21 is rotatably mounted on the surface of the base frame 22, a screw 26 is fixedly mounted inside the base frame 22, and sleeve blocks 23 are fixedly mounted on the surfaces of both the base frame 22 and the rotating frame 21. An adjusting clamping group 25 is driven and installed inside the sleeve blocks 23. The operator adjusts the angle between the rotating frame 21 and the base frame 22 by rotating the rotating frame 21, thereby changing the position of the seamless steel pipe placed between them, thus achieving initial adjustment of the cutting angle. After the angle is adjusted to the correct position, the screw 26 penetrating the interior of the base frame 22 is tightened, and the threaded locking force of the screw 26 is used to fix the position of the base frame 22 and the rotating frame 21, achieving free adjustment and precise fixation of the cutting angle. This solves the problem of easy loosening after angle adjustment of the clamping assembly 2 in traditional cutting machines, avoids angle deviation during subsequent clamping and cutting processes, and meets the cutting requirements of different bevel angles for nuclear power seamless steel pipes.

[0041] Preferably, the support frame 24 is fixedly installed between the opposite faces of the fixed frame 321. The base frame 22 and the rotating frame 21 are threadedly connected by screws 26. Three sleeve blocks 23 are provided, and the three sleeve blocks 23 are distributed in a triangular shape on the surfaces of the base frame 22 and the rotating frame 21. Both the base frame 22 and the rotating frame 21 are hollow structures. The three triangularly distributed sleeve blocks 23 and the adjusting clamping group 25 form a multi-point clamping structure. Compared with the traditional two-point clamping, this significantly improves the coaxiality and stability of the steel pipe clamping, avoids the cutting deviation caused by the steel pipe shaking under force during the cutting process, and ensures the cutting accuracy of the nuclear power steel pipe.

[0042] Preferably, the adjusting clamp assembly 25 includes a center rod 251, a clamping strip 252 is fixedly installed at the end of the center rod 251, the clamping strip 252 has an extrusion groove 253 inside, a fixing block 254 is fixedly installed on both sides of the outer surface of the clamping strip 252, a clamping rod 255 is rotatably installed on the surface of the fixing block 254, an extension rod 256 is rotatably installed inside the clamping rod 255, a positioning plate 257 is rotatably installed between the opposite surfaces of the extension rod 256, the positioning plate 257 is sleeved on the surface of the center rod 251, and a handle 258 is rotatably installed on the surface of the center rod 251 near the positioning plate 257. The operator rotates the handle 258, moving the center rod 251. Through the transmission of the extension rod 256 and the clamping rod 255, the clamping bar 252 is pushed closer to the surface of the steel pipe. When the clamping bar 252 first contacts the steel pipe, the flexible segmented structure begins to initially conform to the outer contour of the steel pipe. The operator continues to tighten the handle 258 to increase the clamping force. Each segment of the clamping bar 252 is squeezed by the outer wall of the steel pipe, undergoing flexible deformation in the radial direction. At the same time, the extrusion groove 253 contracts under force, providing a margin for the deformation of the segmented structure, so that the clamping bar 252 and the outer wall of the steel pipe achieve full contact and form a stable surface contact clamping. During the cutting process, the steel pipe may experience slight vibrations due to the cutting force. The flexible structure of the clamping bar 252 can buffer the vibration impact, and the elastic restoring force of the extrusion groove 253 can maintain the stability of the clamping force, preventing the clamp from loosening due to vibration. Reverse rotation of the handle 258 releases the adjusting clamp group 25, the flexible structure of the clamping bar 252 automatically springs back to its original position, the extrusion groove 253 reopens and disengages from the outer wall of the steel pipe, making it easy to remove the processed steel pipe.

[0043] Preferably, the extension rod 256 passes through the interior of the sleeve block 23, and the end of the clamping rod 255 away from the fixed block 254 is rotatably connected to the sleeve block 23. The clamping bar 252 is configured as a segmented flexible structure. The segmented flexible clamping bar 252 can elastically deform along the contour of the outer wall of the steel pipe, and cooperate with the expansion and contraction allowance of the extrusion groove 253 to form multi-point contact with the outer wall of the steel pipe. When the extrusion groove 253 is subjected to clamping force, it will undergo slight contraction, so that each segment is tightly attached to the surface of the steel pipe, increasing the friction. Compared with the line contact of the rigid clamping bar 252, the surface contact clamping method can effectively prevent the steel pipe from axial movement or radial displacement, ensuring cutting accuracy. Nuclear power seamless steel pipes have strict requirements for surface quality. The flexible structure can buffer the locking force of the adjustable clamping group 25, and the extrusion groove 253 further disperses local pressure, avoiding scratches and indentations on the steel pipe surface caused by rigid clamping, thus meeting the processing quality standards of nuclear power equipment. In addition, the extrusion groove 253 can serve as a chip discharge channel. If small iron chips generated during the cutting process fall onto the clamping surface, they can be discharged through the extrusion groove 253, thus preventing impurities from getting stuck between the clamping bar 252 and the steel pipe and affecting the clamping accuracy.

[0044] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 8 to 10 As shown, preferably, the cutting assembly 4 includes a positioning frame 42, which is slidably mounted on the surface of the guide frame 5. A motion guide seat 41 is fixedly mounted on the outer surface of the positioning frame 42, and a mounting seat 43 is fixedly mounted on the bottom of the motion guide seat 41. A cutting head 44 is fixedly mounted inside the mounting seat 43. The positioning frame 42 is slidably mounted on the surface of the guide frame 5, which provides a moving support track for the cutting assembly 4. According to the cutting position requirements of the seamless steel pipe, the positioning frame 42 can slide horizontally along the guide frame 5, driving the entire cutting assembly 4 to adjust its position to adapt to the processing requirements of different pipe diameters and different cutting points. The motion guide seat 41 is fixedly mounted on the outer surface of the positioning frame 42 and has a vertical driving function, which can drive the mounting seat 43 at the bottom and the cutting head 44 to move up and down, thereby adjusting the distance between the cutting head 44 and the surface of the steel pipe. Mounting base 43 is fixed at the bottom of motion guide base 41 to support cutting head 44. After clamping assembly 2 completes the angle adjustment and clamping of steel pipe, the spatial position of cutting head 44 is precisely adjusted by the lateral sliding of positioning frame 42 and the vertical lifting of motion guide base 41, so that the working center of cutting head 44 is aligned with the preset cutting line of steel pipe, ensuring accurate cutting trajectory.

[0045] Preferably, the cutting head 44 includes a shaft 441, inside which a cutting blade 443 is fixedly mounted. A separating ring 444 is fitted onto the surface of the cutting blade 443, and an inclined block 442 is fixedly mounted at the bottom of the separating ring 444. The inclined blocks 442 are distributed circumferentially on the surface of the separating ring 444. After the cutting operation is started, the shaft 441, as the power transmission component of the cutting head 44, drives the cutting blade 443 to cut the steel pipe. The separating ring 444, fitted onto the surface of the cutting blade 443, serves to separate external impurities and prevent flying iron filings and other debris from getting stuck in the connection position of the cutting blade 443 during the cutting process. The circumferentially distributed inclined blocks 442 and the separating ring 444 effectively prevent impurities from entering the cutting blade 443, further improving the cutting accuracy and smoothness of the seamless steel pipe for nuclear power.

[0046] In use, the assembly frame 35 is fixed to the top side of the guide rail 33. The fastening clamp 31 on its surface is used to clamp the end of the seamless steel pipe. It cooperates with the clamping assembly 2 to form a multi-position fixation at the middle of both ends, which solves the problem of easy shaking when clamping long nuclear power seamless steel pipes and avoids axial movement of the steel pipe during cutting, providing a stable foundation for high-precision cutting. The drive screw 34 is installed on both sides of the outer surface of the guide rail 33. The guide block 323 of the cleaning moving part 32 is threadedly connected to the drive screw 34. When the drive screw 34 is started, it will drive the guide block 323 to slide along the guide rail 33.

[0047] When the cleaning moving part 32 moves, the scraper 325 at its bottom rubs against the surface of the guide rail 33, scraping away impurities such as iron filings and dust. Simultaneously, the magnetic strip 324 on the surface of the scraper 325 attracts fine metal debris. As the cleaning moving part 32 moves with the clamping assembly 2, the scraper 325 and magnetic strip 324 automatically clean impurities from the guide rail 33, preventing wear and tear on the guide rail 33 or affecting sliding accuracy, reducing equipment maintenance frequency, and meeting the requirements for long-term stable operation of nuclear power equipment. The guide wheel 322 on the side of the guide block 323 slides against the side of the frame 1, assisting the cleaning moving part 32 in maintaining smooth sliding and reducing frictional resistance during movement.

[0048] The operator adjusts the angle between the rotating frame 21 and the base frame 22 by rotating the rotating frame 21, thereby changing the position of the seamless steel pipe placed between them and achieving initial adjustment of the cutting angle. After the angle is adjusted to the correct position, the screw 26 that runs through the base frame 22 is tightened. The screw 26 is used to fix the position of the base frame 22 and the rotating frame 21 by thread locking force, so as to achieve free adjustment and precise fixation of the cutting angle. This solves the problem of easy loosening of the clamping component 2 after the angle of the traditional cutting machine is adjusted, avoids angle deviation during subsequent clamping and cutting, and meets the cutting requirements of different bevel angles of nuclear power seamless steel pipes.

[0049] Three triangularly distributed sleeve blocks 23 and adjusting clamp group 25 form a multi-point clamping structure, which significantly improves the coaxiality and stability of steel pipe clamping compared with traditional two-point clamping, avoids cutting deviation caused by the steel pipe shaking under force during the cutting process, and ensures the cutting accuracy of nuclear power steel pipe.

[0050] The positioning frame 42 is slidably mounted on the surface of the guide frame 5. The guide frame 5 provides a moving support track for the cutting assembly 4. According to the cutting position requirements of the seamless steel pipe, the positioning frame 42 can slide horizontally along the guide frame 5, driving the entire cutting assembly 4 to adjust its position to adapt to the processing requirements of different pipe diameters and different cutting points. The motion guide seat 41 is fixedly mounted on the outer surface of the positioning frame 42. It has a vertical driving function and can drive the mounting seat 43 at the bottom and the cutting head 44 to move up and down, realizing the adjustment of the distance between the cutting head 44 and the surface of the steel pipe. The mounting seat 43 is fixed at the bottom of the motion guide seat 41 and is used to support the cutting head 44. After the clamping assembly 2 completes the angle adjustment and clamping of the steel pipe, the spatial position of the cutting head 44 is precisely adjusted by the lateral sliding of the positioning frame 42 and the vertical lifting of the motion guide seat 41, so that the working center of the cutting head 44 is aligned with the preset cutting line of the steel pipe, ensuring that the cutting trajectory is accurate.

[0051] After the cutting operation starts, the shaft 441, as the power transmission component of the cutting head 44, drives the cutting blade 443 to cut the steel pipe. The separating ring 444 is fitted on the surface of the cutting blade 443 to separate external impurities and prevent iron filings and other debris from getting stuck in the connection position of the cutting blade 443 during the cutting process. The circumferentially distributed inclined blocks 442 and the separating ring 444 effectively prevent impurities from entering the cutting blade 443, further improving the cutting accuracy and smoothness of the seamless steel pipe for nuclear power.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cutting machine for cutting a seamless steel pipe for nuclear power plants with an adjustable cutting angle, characterized in that, include: A frame (1) is provided with a support assembly (3) fixedly installed inside the frame (1). A clamping assembly (2) is fixedly installed on the top of the support assembly (3). The clamping assembly (2) fixes the seamless steel pipe at multiple points through the support assembly (3). A guide frame (5) is provided, and a cutting assembly (4) is mounted on the top of the guide frame (5). The cutting assembly (4) is mounted above the frame (1) via the guide frame (5). The support assembly (3) includes a guide rail (33), an assembly frame (35) is fixedly installed on the top side of the guide rail (33), a fastening clamp (31) is fixedly installed on the surface of the assembly frame (35), a drive screw (34) is driven on both sides of the outer surface of the guide rail (33), a cleaning moving part (32) is driven on the top of the guide rail (33) through the drive screw (34), and the cleaning moving part (32) is fixedly installed on the bottom of the clamping assembly (2). The guide rail (33) is fixedly installed inside the frame (1). Two sets of cleaning moving parts (32) are provided, and both sets of cleaning moving parts (32) are slidably adapted to the surface of the guide rail (33). The clamping assembly (2) includes a support frame (24), a base frame (22) is fixedly installed on the top of the support frame (24), a rotating frame (21) is rotatably installed on the surface of the base frame (22), a screw (26) is fixedly installed inside the base frame (22), and a sleeve block (23) is fixedly installed on the surface of both the base frame (22) and the rotating frame (21), and an adjusting clamping group (25) is installed inside the sleeve block (23). The support frame (24) is fixedly installed between the opposite faces of the fixed frame (321). The base frame (22) and the rotating frame (21) are threadedly connected by a screw (26). Three sleeve blocks (23) are provided. The three sleeve blocks (23) are distributed in a triangular shape on the surface of the base frame (22) and the rotating frame (21). Both the base frame (22) and the rotating frame (21) are hollow structures. The adjusting clamp assembly (25) includes a center rod (251), a clamping strip (252) is fixedly installed at the end of the center rod (251), a squeezing groove (253) is opened inside the clamping strip (252), a fixing block (254) is fixedly installed on both sides of the outer surface of the clamping strip (252), a clamping rod (255) is rotatably installed on the surface of the fixing block (254), an extension rod (256) is rotatably installed inside the clamping rod (255), a positioning plate (257) is rotatably installed between the opposite surfaces of the extension rod (256), the positioning plate (257) is sleeved on the surface of the center rod (251), and a throttle handle (258) is rotatably installed on the surface of the center rod (251) near the positioning plate (257).

2. The nuclear power seamless steel pipe cutting machine with adjustable cutting angle according to claim 1, characterized in that: The cleaning moving part (32) includes a fixed frame (321), and two fixed frames (321) are provided. A guide block (323) is fixedly installed between the opposite surfaces of the two fixed frames (321). A guide wheel (322) is rotatably installed on one side of the outer surface of the guide block (323). A scraper (325) is fixedly installed at the bottom of both the fixed frame (321) and the guide block (323). A magnetic strip (324) is fixedly installed on the surface of the scraper (325).

3. The nuclear power seamless steel pipe cutting machine with adjustable cutting angle according to claim 2, characterized in that: The fixing frame (321) is fixedly installed on both sides of the bottom of the clamping assembly (2), the scraper (325) is frictionally adapted to the surface of the guide rail (33), the guide block (323) is driven and installed on the surface of the drive screw (34), and the guide wheel (322) is slidably installed on the side of the frame (1).

4. The nuclear power seamless steel pipe cutting machine with adjustable cutting angle according to claim 1, characterized in that: The extension rod (256) passes through the inside of the sleeve block (23), the end of the clamping rod (255) away from the fixing block (254) is rotatably connected to the sleeve block (23), and the clamping bar (252) is set as a segmented flexible structure.

5. The nuclear power seamless steel pipe cutting machine with adjustable cutting angle according to claim 1, characterized in that: The cutting assembly (4) includes a positioning frame (42), which is slidably mounted on the surface of the guide frame (5). A motion guide seat (41) is fixedly mounted on the outer surface of the positioning frame (42), and a mounting seat (43) is fixedly mounted on the bottom of the motion guide seat (41). A cutting head (44) is fixedly mounted inside the mounting seat (43).

6. A seamless steel pipe cutting machine for nuclear power plants with adjustable cutting angle according to claim 5, characterized in that: The cutting head (44) includes a shaft (441), a cutting blade (443) is fixedly installed inside the shaft (441), a separating ring (444) is sleeved on the surface of the cutting blade (443), and an inclined block (442) is fixedly installed at the bottom of the separating ring (444). The inclined block (442) is distributed in a circumferential shape on the surface of the separating ring (444).

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