Gas pipeline cutting mechanism and machine tool thereof

Abstract

The invention relates to the technical field of cutting equipment, in particular to a gas pipeline cutting mechanism and a machine tool thereof, the gas pipeline cutting mechanism is applied to the machine tool, and the gas pipeline cutting mechanism comprises a support, an annular sliding rail, a rotating sleeve, a cutting machine, a rotating assembly, a self-adaptive limiting assembly and a linear displacement assembly; the annular sliding rail is vertically arranged on the machine frame, a through hole allowing a pipeline to penetrate through is formed in the center of the rotating sleeve, the rotating assembly is arranged on the machine frame, and the self-adaptive limiting assembly is arranged in the rotating sleeve and comprises two limiting clamps capable of moving in the opposite directions. The linear displacement assembly comprises a displacement plate capable of moving in the radial direction of the axis of the rotating sleeve, the end, away from the cutting machine, of the displacement plate is connected with a linkage rod, through cooperation of the linear displacement assembly and the self-adaptive limiting assembly, pipelines with different diameters can be adapted without shutdown manual adjustment, and the cutting efficiency and operation convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, specifically to a gas pipeline cutting mechanism and machine tool thereof. Background Technology

[0002] In municipal gas engineering and industrial pipeline installation, gas pipeline cutting is a crucial step in ensuring the sealing of pipeline connections and construction efficiency. Currently, gas pipeline cutting largely relies on specialized cutting equipment or cutting mechanisms modified from general-purpose machine tools. The core requirements are to achieve precise pipeline cutting, stable fixing, and efficient adaptation to different pipe diameters.

[0003] Chinese Patent Publication No. CN220028854U discloses a gas pipeline cutting device. A pressure frame and clamping blocks fix the pipeline. A first cylinder pushes a cutting blade downwards to cut the gas pipeline. When the plane of the turntable is parallel to the inclined plane of the front ramp, the gas pipeline, after being cut, falls onto the plane of the turntable and rolls forward along the front ramp, being intercepted by a stop bar. Rotating the turntable makes the upper plane parallel to the plane of the rear ramp, and subsequent pipelines roll backwards along the rear ramp, facilitating the transfer of pipelines from the front by workers. The device includes a base, a base column, and a fixing seat. The base column is fixedly installed at the bottom of the base, and the fixing seat is fixedly installed at the top of the base. The top of the fixing seat has an arc-shaped groove. The device also includes a cutting mechanism, a first fixing mechanism, a second fixing mechanism, and a transfer mechanism. The cutting mechanism is located at the top of the base, the first fixing mechanism is located on the cutting mechanism, the second fixing mechanism is located on the left side of the fixing seat, and the transfer mechanism is located at the top of the base.

[0004] The existing gas pipeline cutting device and related machine tools have the following problems: When cutting pipes of different diameters, the machine must be stopped and the position of the cutting blade and the distance between the limiting components must be manually adjusted, which is cumbersome and time-consuming. For example, after changing the pipe diameter, the relative position of the cutting blade and the pipe needs to be recalibrated. If the adjustment accuracy is insufficient, it can easily lead to inconsistent cutting depths. At the same time, the manual adjustment of the limiting components makes it difficult to ensure the symmetry of the clamps on both sides, further aggravating the cutting deviation and seriously affecting processing efficiency and product consistency. In existing systems, the displacement adjustment of the cutting blade and the limiting and fixing of the pipeline are mostly controlled independently, lacking a mechanical linkage mechanism. When the cutting blade approaches the pipeline, the limiting device needs to be activated separately to clamp the pipeline; after cutting, the limiting device must be released before the cutting blade can be moved. This process is redundant and prone to pipeline detachment or collision with the cutting blade due to operational timing errors, posing a safety hazard.

[0005] In summary, there is an urgent need for a cutting mechanism with adaptive limiting, cutting and limiting linkage, and a matching machine tool to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the aforementioned issues, a gas pipeline cutting mechanism and its machine tool are provided. Through the cooperation of a linear displacement component and an adaptive limit component, it can adapt to pipelines of different diameters without requiring manual adjustment during machine shutdown, thereby improving cutting efficiency and ease of operation.

[0007] To address the problems of existing technologies, this invention provides a gas pipeline cutting mechanism applied to a machine tool. The cutting mechanism includes a support, an annular slide rail, a rotating sleeve, a cutting machine, a rotating assembly, an adaptive limit assembly, and a linear displacement assembly. The support is mounted on the machine tool; The annular slide rail is vertically mounted on the frame; The rotating sleeve is slidably mounted on the inner ring of the annular slide rail via a slider, and a through hole for the pipe to pass through is provided at the center of the rotating sleeve; The rotating assembly is mounted on the frame and is used to drive the rotating sleeve to rotate; An adaptive limit component is located inside the rotating sleeve and is used to limit the pipe during pipe cutting; The adaptive limit assembly includes two limit clamps that can move in opposite directions; The linear displacement assembly is installed on the outer wall of the rotating sleeve. The linear displacement assembly includes a displacement plate that can move radially along the axis of the rotating sleeve. The cutting machine is connected to one end of the displacement plate. The output end of the cutting machine faces the through hole of the rotating sleeve. The end of the displacement plate away from the cutting machine is connected to a linkage rod. One end of the linkage rod is internally connected to the adaptive limit assembly. When the cutting machine moves through the displacement plate, the linkage rod simultaneously drives the two limit clamps in the adaptive limit mechanism to limit the outer wall of the pipe.

[0008] Preferably, the adaptive limiting assembly further includes a moving component for moving the two limiting clamps toward each other, the moving component including a first light rod and a sliding block; The first guide rod has a pair and is symmetrically arranged on both sides of the inside of the rotating sleeve through a connecting plate. The first guide rod is located between two limiting clamps. The number of sliding blocks is the same as the number of first optical rods and they are fitted onto the first optical rods in a one-to-one correspondence. The sliding blocks are slidably located outside the first optical rods. Connecting rods are hinged to both sides of the sliding blocks. The ends of the two connecting rods away from the sliding blocks are respectively hinged to the inner sidewalls of the two limiting clamps.

[0009] Preferably, a first spring is sleeved on the outside of the first guide rod, and the two ends of the first spring abut against one side of the sliding block and the inner side of the connecting plate, respectively.

[0010] Preferably, the limiting clamp includes a frame, an L-shaped movable plate, a second guide rod, a second spring, and rollers; The frame is horizontally positioned inside the rotating sleeve, and each link in the opposing moving parts is hinged to both sides of the frame. The second optical rod is provided in multiple forms and is distributed horizontally and equidistantly within the frame; The L-shaped movable plate has a pair of mirror images of each other within the frame. The upper side of the L-shaped movable plate is provided with a limiting hole that slides with the second light rod. The number of second springs is the same as the number of second light rods and they are fitted onto the outside of the second light rods in a one-to-one correspondence. The two ends of the second springs abut against the upper side wall of the L-shaped movable plate and the inner side wall of the frame, respectively. The number of rollers is the same as the number of L-shaped movable plates and they correspond one-to-one. The rollers that can rotate are located at the bottom of the L-shaped movable plates. One end of the linkage rod is connected to the frame inside one of the limit clamps.

[0011] Preferably, the roller is made of industrial rubber.

[0012] Preferably, the linear displacement assembly further includes a mounting bracket, a first servo motor, and a threaded shaft; The mounting bracket is located on the outer wall of the rotating sleeve. The mounting bracket has a movable cavity. One side of the mounting bracket is open. The displacement plate is horizontally placed in the movable cavity. The end of the displacement plate near the cutting machine passes through the open end of the mounting bracket and is connected to the cutting machine. The threaded shaft is installed inside the mounting bracket, with both ends of the threaded shaft connected to the inner sides of the mounting bracket respectively. The displacement plate is provided with a threaded bushing that is threadedly engaged with the threaded shaft. The first servo motor is located on the side of the mounting bracket away from the rotating sleeve. The output shaft of the first servo motor is connected to one end of the threaded shaft. One end of the linkage rod can move through the side of the mounting bracket away from the first servo motor and connect to one of the two limit clamps.

[0013] Preferably, the mounting bracket is provided with vertical plates on both sides near the cutting machine, and linear slide rails are provided on the vertical plates. A linear slider that can slide and cooperate with each linear slide rail is provided on one side of the cutting machine.

[0014] Preferably, the rotating assembly includes a second servo motor, a driving wheel, a driven wheel, a gear, and a ring rack; The annular rack is positioned outside the rotating sleeve along its axis; The gear is located beside the ring rack and meshes with the ring rack. A bearing seat is provided on the side of the bracket near the gear. A rotating shaft is provided at the center of the gear, and one end of the rotating shaft is rotatably connected to the bearing seat. The driven wheel is coaxially mounted at the end of the rotating shaft furthest from the gear; The second servo motor is mounted on the machine tool, and the driving wheel is mounted on the output shaft of the second servo motor. The driving wheel and the driven wheel are connected by a synchronous belt drive.

[0015] Preferably, the upper and lower ends of the bracket are mirror-mounted with three-axis cylinders, and the output shaft of the three-axis cylinders is equipped with a clamping plate for clamping the outside of the pipe. The inner side of the clamping plate is fixed with a rubber layer that fits against the outer wall of the pipe.

[0016] The present invention also provides a machine tool, including the above-described gas pipeline cutting mechanism.

[0017] The advantages of this invention compared to the prior art are: 1. This invention, through the cooperation of a linear displacement component and an adaptive limit component, enables the adaptation to pipes of different diameters without the need for manual adjustment during machine shutdown, thereby improving cutting efficiency and ease of operation.

[0018] 2. This invention converts linear displacement into opposing clamping forces of the limiting fixture by sliding the sliding block on the first guide rod in conjunction with the lever transmission of the connecting rod. This achieves adaptive fitting and stable limiting of pipes of different diameters, and is synchronized with the displacement of the cutting machine. No additional driving components are required, which simplifies the structure and improves operating efficiency.

[0019] 3. This invention achieves precise displacement control of the cutting machine by driving the threaded transmission with a servo motor. At the same time, the displacement is synchronously transmitted to the adaptive limit component through the linkage rod, so that the cutting action and the limit action are coordinated. It can adapt to the cutting needs of pipes of different diameters without manual intervention, thereby improving the degree of automation and operating efficiency. Attached Figure Description

[0020] Figure 1 This is a partial front view of a gas pipeline cutting mechanism and its machine tool.

[0021] Figure 2 This is a three-dimensional structural diagram of a gas pipeline cutting mechanism.

[0022] Figure 3 This is a partial three-dimensional structural diagram of a gas pipeline cutting mechanism.

[0023] Figure 4 This is a partial front view of a gas pipeline cutting mechanism.

[0024] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0025] Figure 6 This is a cross-sectional view of a gas pipeline cutting mechanism.

[0026] Figure 7 This is a partial three-dimensional structural diagram of a rotating component of a gas pipeline cutting mechanism.

[0027] Figure 8This is a partial three-dimensional structural diagram of the adaptive limiting component and linear displacement component of a gas pipeline cutting mechanism.

[0028] Figure 9 This is a partial three-dimensional structural diagram of an adaptive limiting component for a gas pipeline cutting mechanism.

[0029] Figure 10 This is a partial three-dimensional structural diagram of a linear displacement component of a gas pipeline cutting mechanism.

[0030] The following are the labels in the diagram: 1. Machine tool; 2. Support; 22. Three-axis cylinder; 221. Clamping plate; 3. Circular slide rail; 4. Rotary sleeve; 41. Through hole; 5. Cutting machine; 6. Rotary assembly; 61. Second servo motor; 62. Drive wheel; 63. Driven wheel; 64. Gear; 65. Circular rack; 66. Bearing seat; 67. Rotary shaft; 7. Adaptive limit assembly; 71. Limiting fixture; 711. Frame; 712. L-shaped movable plate; 713. Second guide rod; 714. Second spring; 715. Roller; 8. Linear displacement assembly; 81. Displacement plate; 82. Linkage rod; 83. Mounting bracket; 831. Vertical plate; 832. Linear slide rail; 833. Linear slider; 84. First servo motor; 85. Threaded shaft; 86. Threaded bushing; 9. Opposing moving parts; 91. First guide rod; 911. First spring; 92. Sliding block; 921. Connecting rod; 93. Connecting plate. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown: A gas pipeline cutting mechanism is applied on a machine tool 1. The cutting mechanism includes a support 2, an annular slide rail 3, a rotating sleeve 4, a cutting machine 5, a rotating component 6, an adaptive limit component 7, and a linear displacement component 8. The bracket 2 is mounted on the machine tool 1; The annular slide rail 3 is vertically mounted on the frame; The rotating sleeve 4 is slidably mounted on the inner ring of the annular slide rail 3 via a slider, and a through hole 41 for the pipe to pass through is provided at the center of the rotating sleeve 4. The rotating assembly 6 is mounted on the frame and is used to drive the rotating sleeve 4 to rotate. The adaptive limiting component 7 is disposed inside the rotating sleeve 4 and is used to limit the pipe during pipe cutting; The adaptive limiting component 7 includes two limiting clamps 71 that can move in opposite directions; The linear displacement assembly 8 is disposed on the outer wall of the rotating sleeve 4. The linear displacement assembly 8 includes a displacement plate 81 that can move radially along the axis of the rotating sleeve 4. The cutting machine 5 is connected to one end of the displacement plate 81. The output end of the cutting machine 5 faces the through hole 41 of the rotating sleeve 4. The end of the displacement plate 81 away from the cutting machine 5 is connected to a linkage rod 82. One end of the linkage rod 82 is internally connected to the adaptive limit assembly 7. When the cutting machine 5 moves through the displacement plate 81, the linkage rod 82 simultaneously drives the two limit clamps 71 in the adaptive limit mechanism to limit the outer wall of the pipe.

[0033] The gas pipeline passes through the through hole 41 in the center of the rotating sleeve 4. At this time, the adaptive limiting component 7 is in its initial state, and a certain distance is maintained between the two limiting clamps 71, so as not to affect the pipeline passing through. The bracket 2 provides stable support for the overall structure, while the annular slide rail 3 provides a guide track for the rotation of the rotating sleeve 4. When cutting is required, the linear displacement component 8 is activated, driving the displacement plate 81 to move radially along the axis of the rotating sleeve 4 (i.e., moving towards or away from the pipe), which in turn drives the cutting machine 5 to move towards the outer wall of the pipe and adjusts the distance between the cutting blade and the pipe. During this process, the displacement plate 81 drives the internal transmission structure of the adaptive limit component 7 through the linkage rod 82, causing the two limit clamps 71 to move towards each other. The larger the pipe diameter, the closer the distance that the displacement plate 81 drives the cutting machine 5 to move, and the more the linkage rod 82 pushes the gap between the limit clamps 71 to shrink, until the two limit clamps 71 are tightly attached to the outer wall of the pipe, thus completing the adaptive limit of the pipe. After the limit is completed, the rotating component 6 drives the rotating sleeve 4 to rotate along the annular slide rail 3, which drives the entire adaptive limit component 7 and the fixed pipe to rotate synchronously. At the same time, the cutting machine 5 starts, and its output end performs circumferential cutting on the pipe to ensure that the cut is flat. After the cutting is completed, the linear displacement component 8 drives the displacement plate 81 to move in the opposite direction, causing the cutting machine 5 to move away from the pipe. The linkage rod 82 simultaneously pulls the two limit clamps 71 to separate in the opposite direction, releasing the limit on the pipe. The pipe can be moved out or continue to be transported, completing one cutting cycle. By combining the linear displacement component 8 with the adaptive limit component 7, it is possible to adapt to pipes of different diameters without stopping the machine for manual adjustment, thereby improving cutting efficiency and ease of operation.

[0034] Reference Figure 4 , Figure 5 and Figure 9 As shown: The adaptive limiting component 7 also includes a moving component 9 for moving the two limiting clamps 71 toward each other. The moving component 9 includes a first light rod 91 and a sliding block 92. The first guide rod 91 has a pair and is symmetrically arranged on both sides of the inside of the rotating sleeve 4 through the connecting plate 93. The first guide rod 91 is located between the two limiting clamps 71. The number of sliding blocks 92 is the same as the number of first optical rods 91 and they are fitted onto the first optical rods 91 in a one-to-one correspondence. The sliding blocks 92 are slidably disposed outside the first optical rods 91. Connecting rods 921 are hinged to both sides of the sliding blocks 92. The ends of the two connecting rods 921 away from the sliding blocks 92 are respectively hinged to the inner sidewalls of the two limiting clamps 71.

[0035] The adaptive limiting component 7, through the cooperation of the first optical rod 91, the sliding block 92, and the connecting rod 921, enables the two limiting clamps 71 to move towards each other. The specific process is as follows: When the linear displacement component 8 moves the displacement plate 81, the linkage rod 82 transmits power to the sliding block 92, pushing the sliding block 92 to slide along the axis of the first smooth rod 91; If the sliding block 92 moves away from the limiting clamp 71, the two connecting rods 921 on both sides are pushed by the sliding block 92 to retract and drive the two limiting clamps 71 to rotate around the hinge point, so that the limiting clamps 71 move closer to the pipeline. As the sliding block 92 continues to move, the support angle of the connecting rod 921 gradually changes, and the spacing of the limiting clamp 71 continuously decreases until it fits against the outer wall of the pipe, thus completing the clamping and limiting of the pipe. After the cutting is completed, the linear displacement component 8 drives the displacement plate 81 to move in the opposite direction, the linkage rod 82 pulls the sliding block 92 to slide in the opposite direction along the first smooth rod 91, and the connecting rod 921 pulls the limiting clamp 71 to rotate in the opposite direction around the hinge point. The two limiting clamps 71 move away from each other, releasing the limitation on the pipeline, and the pipeline can be moved out smoothly.

[0036] Reference Figure 5 and Figure 9 As shown: A first spring 911 is sleeved on the outside of the first light rod 91, and the two ends of the first spring 911 abut against one side of the sliding block 92 and the inner side of the connecting plate 93, respectively.

[0037] The first spring 911 uses its elastic force to automatically reset the sliding block 92, enhance the clamping stability of the limit clamp 71, and buffer the impact force during the clamping process.

[0038] Reference Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown: The limiting clamp 71 includes a frame 711, an L-shaped movable plate 712, a second guide rod 713, a second spring 714, and a roller 715; The frame 711 is horizontally arranged inside the rotating sleeve 4, and each connecting rod 921 in the opposing moving parts 9 is hinged to both sides of the frame 711. Multiple second optical rods 713 are provided and are horizontally and equidistantly distributed within the frame 711; The L-shaped movable plate 712 has a pair and is mirror-arranged within the frame 711. The upper side of the L-shaped movable plate 712 is provided with a limiting hole that slides with the second light rod 713. The number of second springs 714 is the same as the number of second light rods 713 and they are fitted on the outside of the second light rods 713 in a one-to-one correspondence. The two ends of the second springs 714 abut against the upper side wall of the L-shaped movable plate 712 and the inner side wall of the frame 711, respectively. The number of rollers 715 is the same as the number of L-shaped movable plates 712 and they correspond one-to-one. The rollers 715 are rotatable and are located at the bottom of the L-shaped movable plates 712. One end of the linkage rod 82 is connected to the frame 711 inside one of the limiting clamps 71.

[0039] One end of the linkage rod 82 is connected to the frame 711 of one of the limiting clamps 71. When the linear displacement assembly 8 drives the displacement plate 81 to move, the linkage rod 82 drives one of the frames 711 to move, and the opposing moving component 9 makes the two frames 711 move towards each other. When the frame 711 approaches the pipe, the roller 715 first contacts the outer wall of the pipe. Due to the difference in pipe diameter, the L-shaped movable plates 712 on both sides will be subjected to the reverse thrust of the pipe and slide along the axis of the second light rod 713 towards the inside of the frame 711, moving away from or closer to each other. The second spring 714 is sleeved on the outside of the second smooth rod 713, with its two ends abutting against the upper side wall of the L-shaped movable plate 712 and the inner side wall of the frame 711, respectively. When the L-shaped movable plate 712 slides, the second spring 714 is compressed or stretched, generating a reverse elastic force, which pushes the L-shaped movable plate 712 to always fit against the outer wall of the pipe, so as to achieve adaptive clamping for pipes of different diameters. The roller 715 is rotatably mounted at the bottom of the L-shaped movable plate 712 and contacts the outer wall of the pipe. During the pipe cutting process, when the rotating sleeve 4 rotates, the roller 715 rotates along the circumference of the pipe, limiting the pipe during the rotation process to ensure that the pipe does not deviate during cutting.

[0040] Reference Figure 9 As shown: Roller 715 is made of industrial rubber.

[0041] The industrial rubber roller 715 has a high coefficient of friction. When the roller 715 comes into contact with the outer wall of the gas pipeline, it can generate a large static friction force. During the process of the pipeline rotating and cutting with the rotating sleeve 4, it can effectively prevent relative sliding between the pipeline and the roller 715, ensure the stability of the pipeline in the limited state, and avoid the deviation or unevenness of the cut due to slippage.

[0042] Reference Figure 4 , Figure 6 , Figure 8 and Figure 10 As shown: The linear displacement assembly 8 also includes a mounting bracket 83, a first servo motor 84, and a threaded shaft 85; Mounting bracket 83 is disposed on the outer wall of rotating sleeve 4. Mounting bracket 83 has a moving cavity. One side of mounting bracket 83 is open. Displacement plate 81 is horizontally disposed in the moving cavity. The end of displacement plate 81 near the cutting machine 5 passes through the open end of mounting bracket 83 and is connected to the cutting machine 5. The threaded shaft 85 is disposed inside the mounting bracket 83, and the two ends of the threaded shaft 85 are respectively axially connected to the two sides inside the mounting bracket 83. The displacement plate 81 is provided with a threaded bushing 86 that is threadedly engaged with the threaded shaft 85. The first servo motor 84 is located on the side of the mounting bracket 83 away from the rotating sleeve 4. The output shaft of the first servo motor 84 is connected to one end of the threaded shaft 85. One end of the linkage rod 82 can move through the side of the mounting bracket 83 away from the first servo motor 84 and is connected to one of the two limiting clamps 71.

[0043] When the first servo motor 84 starts, the output shaft drives the threaded shaft 85 to rotate around its own axis, converting the rotational motion into linear motion through the threaded engagement. When the threaded shaft 85 rotates, the threaded bushing 86 moves axially along the threaded shaft 85, causing the displacement plate 81 to slide in the moving cavity. Since one end of the displacement plate 81 passes through the open end of the mounting bracket 83 and is connected to the cutting machine 5, the movement of the displacement plate 81 directly drives the cutting machine 5 to move closer to or further away from the pipe, thereby adjusting the cutting position. One end of the linkage rod 82 moves through the side of the mounting bracket 83 away from the first servo motor 84 and is connected to one of the limit clamps 71 in the adaptive limit assembly 7. When the displacement plate 81 moves along the threaded shaft 85, its other end transmits the displacement to the limit clamp 71 through the linkage rod 82. If the displacement plate 81 drives the cutting machine 5 to move towards the pipeline, the linkage rod 82 simultaneously pushes the limiting clamp 71 to move towards the pipeline, and cooperates with the other limiting clamp 71 to limit the pipeline. If the displacement plate 81 moves the cutting machine 5 away from the pipe, the linkage rod 82 pulls the limit clamp 71 to move in the opposite direction and releases the limit on the pipe; The linear displacement component 8 is driven by a servo motor to achieve precise displacement control of the cutting machine 5 through thread transmission. At the same time, the displacement is synchronously transmitted to the adaptive limit component 7 through the linkage rod 82, so that the cutting action and the limit action are coordinated. It can adapt to the cutting needs of pipes of different diameters without manual intervention, thereby improving the degree of automation and operating efficiency.

[0044] Reference Figure 8 As shown: The mounting bracket 83 has vertical plates 831 on both sides near the cutting machine 5. The vertical plates 831 are equipped with linear slide rails 832. The cutting machine 5 has a linear slider 833 on one side that can slide and cooperate with each linear slide rail 832.

[0045] The linear slider 833 on one side of the cutting machine 5 slides in conjunction with the linear slide rail 832 to form a sliding guide structure. When the linear displacement component 8 drives the cutting machine 5 to move with the displacement plate 81, the linear slider 833 slides synchronously along the linear slide rail 832, limiting the movement trajectory of the cutting machine 5 and ensuring that it only moves in the preset horizontal direction. This avoids the cutting machine 5 from shifting due to the gap or vibration of the threaded transmission, and ensures that the cutting blade is always aligned with the cutting position of the pipe.

[0046] Reference Figure 6 and Figure 7 As shown: The rotating assembly 6 includes a second servo motor 61, a driving wheel 62, a driven wheel 63, a gear 64, and a ring rack 65; The annular rack 65 is disposed on the outside of the rotating sleeve 4 along the axis of the rotating sleeve 4; Gear 64 is located beside and meshes with ring rack 65. A bearing seat 66 is provided on the side of bracket 2 near gear 64. A rotating shaft 67 is provided at the center of gear 64. One end of the rotating shaft 67 is rotatably connected to the bearing seat 66. Driven wheel 63 is coaxially disposed at the end of rotating shaft 67 away from gear 64; The second servo motor 61 is mounted on the machine tool 1, and the drive wheel 62 is mounted on the output shaft of the second servo motor 61. The drive wheel 62 and the driven wheel 63 are connected by a synchronous belt drive.

[0047] The second servo motor 61 is fixed on the base of the machine tool 1. Its output shaft drives the drive wheel 62 to rotate. When the pipe is being cut, the second servo motor 61 starts and drives the drive wheel 62 to rotate. The drive wheel 62 and the driven wheel 63 are connected by a synchronous belt drive to transmit power to the driven wheel 63. The driven wheel 63 and the gear 64 are coaxially mounted on the rotating shaft 67. Therefore, the gear 64 rotates synchronously with the driven wheel 63. The gear 64 meshes with the ring rack 65 outside the rotating sleeve 4, converting the rotational motion into the circular motion of the rotating sleeve 4 around its own axis. By converting the power of the second servo motor 61 into the circular motion of the rotating sleeve 4, the cutting machine 5 can perform a complete ring cut around the pipe, while ensuring the stability and accuracy of the transmission process and adapting to the cutting needs of different pipe diameters.

[0048] Reference Figure 1As shown: The upper and lower ends of the bracket 2 are mirrored with a three-axis cylinder 22. The output shaft of the three-axis cylinder 22 is provided with a clamping plate 221 for clamping the outside of the pipe. The inner side of the clamping plate 221 is fixed with a rubber layer that fits against the outer wall of the pipe.

[0049] The three-axis cylinder 22 is arranged in a mirror image along the upper and lower ends of the bracket 2. When the pipe passes through the through hole 41 of the rotating sleeve 4, the three-axis cylinder 22 is started, and the output shaft pushes the clamping plate 221 to move towards the pipe until the rubber layer on the inner side of the clamping plate 221 contacts the outer wall of the pipe. Under the push of the triaxial cylinder 22, the clamping plate 221 clamps the pipe simultaneously from the top and bottom. Because the rubber layer is elastic, it can deform according to the actual outer diameter and surface shape of the pipe to ensure full fit with the outer wall of the pipe. Even if there are slight unevenness or ellipticity deviations on the pipe surface, the rubber layer can achieve close contact through its own deformation, avoiding local stress concentration or slippage that may be caused by the rigid clamping plate 221, thereby achieving auxiliary clamping of the pipe.

[0050] Reference Figure 1 As shown: The present invention also provides a machine tool 1, which includes the above-described gas pipeline cutting mechanism.

[0051] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A cutting mechanism of a gas pipeline, applied to a machine tool (1), characterized in that, The cutting mechanism comprises a bracket (2), an annular slide rail (3), a rotating sleeve (4), a cutting machine (5), a rotating assembly (6), a self-adaptive limiting assembly (7) and a linear displacement assembly (8); The bracket (2) is arranged on the machine tool (1); The annular slide rail (3) is vertically arranged on the machine frame; The rotating sleeve (4) is slidably arranged in the inner ring of the annular slide rail (3) through a sliding block, and a through hole (41) for the pipeline to pass through is formed in the center of the rotating sleeve (4); The rotating assembly (6) is arranged on the machine frame, and is used for driving the rotating sleeve (4) to rotate; The self-adaptive limiting assembly (7) is arranged in the rotating sleeve (4), and is used for limiting the pipeline during cutting; The self-adaptive limiting assembly (7) comprises two limiting clamps (71) which can move towards each other; The linear displacement assembly (8) is arranged on the outer wall of the rotating sleeve (4), and comprises a displacement plate (81) which can move radially along the axis of the rotating sleeve (4), one end of the displacement plate (81) is connected with the cutting machine (5), the output end of the cutting machine (5) faces the through hole (41) of the rotating sleeve (4), the end of the displacement plate (81) away from the cutting machine (5) is connected with a linkage rod (82), one end of the linkage rod (82) is in transmission connection with the self-adaptive limiting assembly (7) inside, when the cutting machine (5) moves through the displacement plate (81), the linkage rod (82) simultaneously drives the two limiting clamps (71) in the self-adaptive limiting assembly to limit the outer wall of the pipeline.

2. A gas pipe cutting mechanism according to claim 1, wherein The self-adaptive limiting assembly (7) further comprises a moving-towards-each-other component (9) for moving the two limiting clamps (71) towards each other, the moving-towards-each-other component (9) comprises a first light rod (91) and a sliding block (92); The first light rod (91) has a pair of and is symmetrically arranged on both sides of the inside of the rotating sleeve (4) through a connecting plate (93), and the first light rod (91) is located between the two limiting clamps (71); The number of the sliding blocks (92) is the same as that of the first light rods (91) and is one-to-one corresponding to the first light rods (91), the sliding blocks (92) are slidably arranged outside the first light rods (91), and both sides of each sliding block (92) is hingedly connected with a connecting rod (921), and one end of each connecting rod (921) away from the sliding block (92) is hingedly connected with the inner side wall of each limiting clamp (71).

3. A gas pipe cutting mechanism according to claim 2, wherein The first light rod (91) is externally sleeved with a first spring (911), and both ends of the first spring (911) are respectively abutted with one side of the sliding block (92) and the inner side of the connecting plate (93).

4. A gas pipe cutting mechanism according to claim 3, wherein The limiting clamp (71) comprises a frame (711), an L-shaped movable plate (712), a second light rod (713), a second spring (714) and a roller (715); The frame (711) is horizontally arranged in the rotating sleeve (4), and each connecting rod (921) in the moving-towards-each-other component (9) is hingedly connected with both sides of the frame (711); The second light rod (713) is provided with a plurality of and is horizontally distributed in the frame (711) at equal intervals; The L-shaped movable plate (712) has a pair of and is mirror-symmetrically arranged in the frame (711), and the upper side of the L-shaped movable plate (712) is provided with a limiting hole in sliding fit with the second light rod (713); The second spring (714) is sleeved outside the second light pole (713) in a one-to-one correspondence with the number of the second light pole (713), and the two ends of the second spring (714) abut against the upper side wall of the L-shaped movable plate (712) and the inner side wall of the frame (711) respectively. The number of the roller (715) is the same as that of the L-shaped movable plate (712) in a one-to-one correspondence, and the roller (715) is rotatably arranged at the bottom of the L-shaped movable plate (712). One end of the linkage rod (82) is connected with the frame (711) in one of the limiting clamps (71).

5. A gas pipe cutting mechanism according to claim 4, wherein, The material of the roller (715) is industrial rubber.

6. A gas pipe cutting mechanism as claimed in claim 1, wherein, The linear displacement assembly (8) further comprises a mounting frame (83), a first servo motor (84) and a threaded shaft (85). The mounting frame (83) is arranged on the outer wall of the rotating sleeve (4), and the mounting frame (83) is provided with a moving cavity. One side of the mounting frame (83) is open, and the displacement plate (81) is horizontally arranged in the moving cavity. One end of the displacement plate (81) close to the cutting machine (5) penetrates through the open end of the mounting frame (83) and is connected with the cutting machine (5). The threaded shaft (85) is arranged in the mounting frame (83), and the two ends of the threaded shaft (85) are respectively connected with the two sides of the mounting frame (83). A threaded shaft sleeve (86) is arranged on the displacement plate (81) and threadedly connected with the threaded shaft (85). The first servo motor (84) is arranged on the side of the mounting frame (83) away from the rotating sleeve (4), and the output shaft of the first servo motor (84) is in transmission connection with one end of the threaded shaft (85). One end of the linkage rod (82) is movably arranged through the side of the mounting frame (83) away from the first servo motor (84) and connected with one of the two limiting clamps (71).

7. A gas pipe cutting mechanism according to claim 6, wherein, Two vertical plates (831) are arranged on the two sides of the mounting frame (83) close to the cutting machine (5), and a linear slide rail (832) is arranged on each vertical plate (831). One side of the cutting machine (5) is provided with a linear sliding block (833) capable of slidingly cooperating with each linear slide rail (832).

8. A gas pipe cutting mechanism as claimed in claim 1, wherein, The rotating assembly (6) comprises a second servo motor (61), a driving wheel (62), a driven wheel (63), a gear (64) and an annular rack (65). The annular rack (65) is arranged outside the rotating sleeve (4) along the axis of the rotating sleeve (4). The gear (64) is arranged beside the annular rack (65) and is in meshing connection with the annular rack (65). The bearing seat (66) is arranged on the side of the bracket (2) close to the gear (64). The rotating shaft (67) is arranged at the center of the gear (64) and is in rotation connection with the bearing seat (66). The driven wheel (63) is coaxially arranged on one end of the rotating shaft (67) away from the gear (64). The second servo motor (61) is arranged on the machine tool (1), and the driving wheel (62) is arranged on the output shaft of the second servo motor (61). The driving wheel (62) and the driven wheel (63) are in transmission connection through a synchronous belt.

9. A gas pipe cutting mechanism as claimed in claim 1, wherein, The upper and lower ends of the support (2) are mirror image provided with three-axis air cylinders (22), the output shafts of the three-axis air cylinders (22) are provided with clamping plates (221) for clamping the outside of the pipeline, and the inner sides of the clamping plates (221) are fixedly provided with rubber layers abutting the outer wall of the pipeline.

10. A machine tool, characterized by A cutting mechanism for a gas pipeline comprising a cutting mechanism according to any one of claims 1-9.

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