Cutting device for chemical pipeline

Abstract

The utility model discloses a cutting device for chemical pipeline, including the control cabinet and the support of installation for controlling equipment operation, still include: the connecting plate of sliding setting on the support, the connecting plate is slidably connected with the mounting bracket through electric slide rail, the mounting bracket is rotatably provided with the cutting element for cutting pipeline through the drive part, the utility model discloses the parallelism of the support seat of the clasp that is driven by the turnover plate, and the accurate butt joint of the plug-in seat is realized to the cooperation hydraulic cylinder drive clasp drop, and the linear support of the support seat, the antiskid effect of silica gel pad and the angle restraint of limiting block and arc edge angle are combined, form multidimensional positioning system, effectively avoid the problem of pipeline shaking in traditional cutting, cutting element angle deviation, ensure that the stable posture is kept in the pipeline cutting process all the time, and then guarantee the incision plane level, prevent the incision inclination or "spiral" deviation caused by the positioning deviation, satisfy the precision demand of chemical pipeline butt joint.

Description

Technical Field

[0001] This utility model relates to the field of pipeline cutting technology, and more specifically, to a cutting device for chemical pipelines. Background Technology

[0002] In chemical production systems, pipelines are the core carriers connecting various production units and transporting raw materials, intermediates, and finished products. Their operational status directly affects production continuity and safety. When chemical pipelines experience thinning of the pipe walls or leakage due to long-term transport of corrosive media, or when pipeline routes need to be adjusted or pipe diameters changed due to production process upgrades, or when pipelines need to be disassembled in sections during equipment maintenance, precise pipeline cutting operations are required. Furthermore, the leveling of the ends of new pipelines before installation also relies on the cutting process to ensure the sealing of subsequent welding and flange connections, preventing chemical media leakage due to poor interface sealing, which could lead to safety accidents or waste of raw materials.

[0003] There are several problems in pipe cutting operations. First, the lack of an effective support and positioning mechanism during pipe cutting makes the pipe prone to shaking and displacement due to uneven weight distribution or impact forces generated during the cutting process. This results in tilted cut surfaces and rough edges, increasing the difficulty of sealing during subsequent pipe connection and requiring additional manpower for grinding and repair, significantly reducing work efficiency. Second, for the need for tilted pipe cutting (such as oblique pipe connection scenarios), existing equipment often cannot directly achieve angle adjustment. It is necessary to manually fix the pipe tilt posture with additional angle calibration tools. This not only involves complex operation steps but also makes it difficult to ensure the consistency and accuracy of the tilt angle. As a result, the tilted cuts of different pipes cannot be accurately matched, greatly increasing the difficulty of subsequent connection and assembly. Therefore, we urgently need a cutting device for chemical pipes to solve the above problems. Utility Model Content

[0004] One objective of this invention is to provide a new technical solution for a cutting device for chemical pipelines. By using a flipping plate and a hydraulic cylinder in synergy, the device achieves precise positioning of the buckle and centralized control of the electric structure and control cabinet. This avoids errors caused by traditional manual operation and pipeline swaying, resulting in a smooth cut, simplified operation, and adaptability to various cutting scenarios.

[0005] According to a first aspect of the present invention, a cutting device for chemical pipelines is provided, comprising a control cabinet for controlling the operation of the equipment and a bracket mounted on the control cabinet, and further comprising: a connecting plate slidably disposed on the bracket, wherein a mounting frame is slidably connected to the connecting plate via an electric slide rail, and the mounting frame is rotatably disposed with a cutting element for cutting the pipeline via a drive component; and a support seat linearly and equidistantly mounted on the bracket for supporting the pipeline, wherein a clamping element for limiting the positioning of the pipeline is vertically disposed on the bracket.

[0006] Optionally, the driving component includes an electric push rod rotatably connected to a mounting bracket, wherein a movable plate for connecting to a cutting piece is rotatably connected to the mounting bracket via a rotating shaft, and the output end of the electric push rod is rotatably connected to the movable plate via a connecting block.

[0007] Optionally, the movable plate is provided with an arc-shaped corner near the electric push rod, and a limit block is fixedly installed on the mounting bracket at the corresponding arc-shaped corner, with the inner wall of the limit block fitting against the arc-shaped corner. When the electric push rod is working, the arc-shaped corner on the movable plate abuts against the inner wall of the limit block to form a sliding area.

[0008] Optionally, the clamping element includes hydraulic cylinders symmetrically mounted on a bracket, the bracket being provided with a crossbar, and the two ends of the crossbar being bolted to the fixing plate at the output end of the corresponding hydraulic cylinder, and the crossbar moving along its movement path when the hydraulic cylinder is working.

[0009] Optionally, a flip plate is rotatably connected to the crossbar via a damping hinge. Multiple sets of buckles corresponding to the positions of the support seats are linearly and equidistantly arranged on the flip plate, and the connection of the buckles is fixedly installed to the connection of the flip plate by bolts.

[0010] Optionally, the support base has an inner groove that matches the size of the buckle at the corresponding buckle position, and the support base is symmetrically equipped with a plug-in seat that matches the end of the buckle. When the end of the buckle is inserted into the plug-in seat, the side wall of the buckle abuts against the inner wall of the inner groove and forms a locking area.

[0011] Optionally, the end of the buckle is provided with a stepped buckle for adapting to different pipe sizes, and the plug seat is provided with a stepped groove that matches the stepped buckle, and the inner wall of the stepped groove is fixedly installed with a damping pad for anti-slip.

[0012] Optionally, a silicone pad for abutting against the pipe is fixedly installed on the inner wall of the buckle.

[0013] Optionally, a linear guide rail for driving the connecting plate to move is fixedly installed inside the bracket, and the connection point of the connecting plate is fixedly installed on the output end of the linear guide rail.

[0014] 1. According to one embodiment of this disclosure, the chemical pipeline cutting device uses a flipping plate to drive the retaining ring to be set parallel to the support base. With the help of a hydraulic cylinder to drive the retaining ring to descend, it achieves precise docking with the plug-in seat. At the same time, combined with the linear support of the support base, the anti-slip effect of the silicone pad, and the angular constraint of the limiting block and the arc corner, a multi-dimensional positioning system is formed. This effectively avoids the problems of pipeline shaking and cutting angle deviation in traditional cutting, ensuring that the pipeline maintains a stable posture throughout the cutting process. This ensures a flat cut surface and eliminates the tilting or "spiral" deviation of the cut caused by positioning deviation, thus meeting the precision requirements of chemical pipeline docking.

[0015] 2. According to one embodiment of this disclosure, the chemical pipeline cutting device achieves centralized control of linear guide rails, electric slide rails, hydraulic cylinders, and electric push rods through a control cabinet, replacing the traditional operation mode of manually pushing cutting components and manually adjusting the pipeline posture. This not only simplifies the process of preset cutting parameters, adjusting cutting angles, and positioning pipelines, reducing manual intervention and lowering the labor intensity of operators, but also avoids problems such as uneven force and fatigue errors in manual operation through the precise drive of the electric structure. At the same time, the device can be adapted to pipelines of different diameters without replacing parts, and can be adapted to high-requirement cutting scenarios through the optional design of bolt locking, greatly improving the equipment's versatility and operational flexibility, shortening the cycle of a single cutting operation, and improving overall cutting efficiency.

[0016] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0018] Figure 1 This is a first-view overall structural schematic diagram of a cutting device for chemical pipelines in one embodiment; Figure 2 This is a second-view overall structural schematic diagram of a cutting device for chemical pipelines in one embodiment; Figure 3 One embodiment is a cutting device for chemical pipelines. Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a partial cross-sectional view of a cutting device for chemical pipelines in one embodiment; Figure 5 One embodiment is a cutting device for chemical pipelines. Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the buckle structure of a cutting device for chemical pipelines in one embodiment.

[0019] The following are marked in the diagram: 1. Control cabinet; 2. Bracket; 3. Connecting plate; 4. Mounting bracket; 5. Cutting part; 6. Support base; 7. Clamping part; 8. Electric push rod; 9. Moving plate; 10. Arc-shaped corner; 11. Limit block; 12. Hydraulic cylinder; 13. Crossbar; 14. Flip plate; 15. Buckle; 16. Embedded groove; 17. Plug-in socket; 18. Stepped buckle; 19. Stepped slot; 20. Damping pad; 21. Silicone pad; 22. Linear guide rail. Detailed Implementation

[0020] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0021] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0022] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0023] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0024] like Figure 1-6 As shown, a cutting device for chemical pipelines includes a control cabinet 1 for controlling the operation of the equipment and a bracket 2 installed on the control cabinet 1.

[0025] It also includes a connecting plate 3 that is slidably mounted on the bracket 2. A linear guide rail 22 for driving the connecting plate 3 to move is fixedly installed inside the bracket 2. The connection point of the connecting plate 3 is fixedly installed on the output end of the linear guide rail 22.

[0026] Here, the linear guide 22 precisely controls the moving speed of the connecting plate 3 through motor drive, avoiding the problem of uneven force or hand tremors when pushing manually, thereby enabling the cutting part 5 to move at a uniform speed along the preset path, ensuring the flatness of the cutting plane, and eliminating the tilting of the cutting due to movement deviation.

[0027] Furthermore, the linear guide 22 can be customized in length according to the size of the bracket 2, and adopts a high-precision structure to reduce movement jamming, thereby achieving stable cutting of long chemical pipelines and avoiding cut lines caused by component misalignment when cutting long pipelines; the linear guide 22 can be moved by one button controlled by the control cabinet 1 without the need for continuous manual force, thereby reducing the labor intensity of operators, reducing secondary errors caused by fatigue, and reducing the risk of hand contact with the cutting part 5, thus improving operational safety.

[0028] The connecting plate 3 is slidably connected to the mounting bracket 4 via an electric slide rail, and the mounting bracket 4 is equipped with a cutting component 5 for cutting pipes via a drive component.

[0029] Here, the electric slide rail can precisely adjust the position of the mounting bracket 4 through the control cabinet 1 to adapt to the optimal initial spacing between pipes of different diameters and the cutting parts 5, thereby avoiding the problem of overloading the cutting parts 5 due to too small a spacing and incomplete cutting due to too large a spacing, ensuring the stability of the cutting process; the electric slide rail, together with the mounting bracket 4, can adapt to the mainstream chemical pipe diameters without replacing parts, saving the cumbersome operation of replacing the cutting bracket 2 of traditional equipment, thereby reducing the frequency of structural replacement, reducing the procurement and maintenance costs of the bracket 2, and improving the versatility of the equipment.

[0030] Furthermore, by adjusting the position of the mounting bracket 4 to accommodate cutting parts 5 of different sizes, such as diamond saw blades and high-speed steel saw blades, the cutting needs of chemical pipelines of different materials can be met, thereby improving the equipment's adaptability to diverse cutting scenarios.

[0031] The driving component includes an electric push rod 8 rotatably connected to a mounting frame 4. A movable plate 9 for connecting to a cutting piece 5 is rotatably connected to the mounting frame 4 via a rotating shaft. The output end of the electric push rod 8 is rotatably connected to the movable plate 9 via a connecting block. An arc-shaped corner 10 is provided on the movable plate 9 near the electric push rod 8. A limiting block 11 is fixedly installed on the mounting frame 4 at the corresponding arc-shaped corner 10, and the inner wall of the limiting block 11 fits against the arc-shaped corner 10. When the electric push rod 8 is working, the arc-shaped corner 10 on the movable plate 9 abuts against the inner wall of the limiting block 11 to form a sliding area.

[0032] Here, the electric push rod 8 drives the moving plate 9 to rotate by precisely controlling the extension and retraction amount, directly adjusting the tilt angle of the cutting part 5. This eliminates the need for manual marking with a protractor or fixing with a clamp, thereby simplifying the tilt cutting operation process, saving the step of repeated calibration for each pipe, and greatly improving cutting efficiency.

[0033] Furthermore, the electric push rod 8 uses a servo motor drive to ensure the accuracy of angle adjustment, avoiding loose clamps or protractor reading errors when manually fixing, thereby achieving consistency in the tilt angle after cutting multiple pipes, meeting the accuracy requirements of oblique docking of chemical pipelines, and eliminating docking failures caused by angle deviations; the extension and retraction of the electric push rod 8 can be continuously adjusted without the need to change fixing clamps at different angles, thus enabling quick switching between different tilt angle cutting modes, adapting to various oblique docking scenarios in pipeline renovation in chemical workshops, and ensuring the continuity of operations.

[0034] Furthermore, the inner wall of the limiting block 11 and the arc-shaped corner 10 are tightly fitted to form a rigid constraint, which prevents the lateral displacement of the moving plate 9 when subjected to the cutting back impact force, thereby stabilizing the angle of the cutting part 5 during the cutting process and avoiding the cutting deviation caused by the angle displacement when cutting hard material pipes; the cooperation between the limiting block 11 and the arc-shaped corner 10 can limit the displacement of the moving plate 9, prevent the cutting part 5 from causing uneven wear with the pipe, thereby extending the service life of the cutting part 5, reducing the number of times the cutting part 5 is replaced and the procurement cost, and reducing the investment in equipment operation and maintenance.

[0035] It should be noted that the limiting block 11 and the arc-shaped corner 10 can absorb part of the cutting impact force, reduce the swaying amplitude of the moving plate 9, and thus prevent the cutting part 5 from colliding with the support 2 or the pipe, reducing the probability of equipment failure, such as saw blade breakage and safety accidents, such as flying fragments.

[0036] Support seats 6 are linearly and equidistantly installed on bracket 2 to support the pipe. The bracket 2 is equipped with a retaining member 7 for limiting the position of the pipe.

[0037] Here, the support bases 6 are installed in a linear and equidistant manner, which evenly distributes the weight of the pipe to each support base 6, avoiding the middle part from sagging due to its own weight when only the two ends are supported. This ensures that the pipe axis always remains straight and prevents the cut plane from being non-perpendicular to the axis due to the bending of the axis.

[0038] Furthermore, the top of the support base 6 adopts an arc-shaped design that matches the outer wall of the pipe, increasing the contact area with the pipe and thus limiting the pipe's lateral sliding along the support base 6. This prevents the cut from shifting due to pipe sliding during the cutting process and improves the stability of pipe placement. The arc-shaped groove at the top of the support base 6 adopts a large-radius compatible design and, with the appropriate matching gasket, can support pipes of various diameters. This allows the support base 6 to meet the support requirements of pipes of different diameters without needing to be replaced, improving the equipment's adaptability to various pipe diameters.

[0039] The clamping component 7 includes hydraulic cylinders 12 symmetrically mounted on the bracket 2. A crossbar 13 is provided on the bracket 2, and the two ends of the crossbar 13 are respectively bolted to the fixing plate at the output end of the corresponding hydraulic cylinder 12. When the hydraulic cylinder 12 is working, the crossbar 13 moves along its moving path. A flip plate 14 is rotatably connected to the crossbar 13 through a damping hinge. Multiple sets of buckles 15 corresponding to the positions of the support seat 6 are linearly and equidistantly arranged on the flip plate 14, and the connection of the buckles 15 is fixedly installed to the connection of the flip plate 14 by bolts.

[0040] Here, the hydraulic cylinder 12 precisely controls the output force through the hydraulic system, and sets an appropriate clamping force for pipes of different materials, avoiding the problem of excessive force in traditional bolt tightening, thereby achieving flexible clamping, protecting the outer wall of the pipe from deformation and the anti-corrosion layer from damage; the symmetrical installation of the hydraulic cylinder 12 ensures synchronous output of clamping force, and the special treatment of the hydraulic rod ensures that the lifting and lowering are smooth, thereby achieving uniform force on both ends of the crossbar 13 and keeping it in a horizontal state at all times, avoiding pipe positioning displacement caused by the tilt of the crossbar 13, and improving the stability of the pipe after clamping.

[0041] Furthermore, the hydraulic cylinder 12 can adjust its lifting stroke according to the pipe diameter to ensure that the buckle 15 is accurately fitted onto the outer wall of the pipe, thereby achieving effective clamping of pipes at different heights, ensuring the compatibility of the positioning structure with the pipe, and avoiding positioning failure due to insufficient stroke.

[0042] Furthermore, the flip plate 14 drives the buckle 15 to flip through the damping hinge, ensuring that the buckle 15 is set parallel to the support base 6 after flipping. This enables the buckle 15 to be accurately aligned with the inner groove 16 and the plug-in seat 17 of the support base 6, avoiding positioning failure caused by misalignment between the buckle 15 and the support base 6, and ensuring the synergy of the positioning structure.

[0043] It should be noted that the damping hinge adopts a "friction locking structure". After the flip plate 14 drives the buckle 15 to be parallel with the support base 6, the position of the flip plate 14 is locked, thereby resisting the cutting impact force, preventing the buckle 15 and the support base 6 from shifting parallel, ensuring the stability of positioning during the cutting process, and avoiding pipe shaking.

[0044] The support base 6 has an embedded groove 16 that matches the size of the buckle 15 at the corresponding buckle 15. The support base 6 is symmetrically equipped with plug-in seats 17 that match the end of the buckle 15. When the end of the buckle 15 is inserted into the plug-in seat 17, the side wall of the buckle 15 abuts against the inner wall of the embedded groove 16 and forms a locking area. The end of the buckle 15 has a stepped buckle 18 for adapting to different pipe sizes. The plug-in seat 17 has a stepped groove 19 that matches the stepped buckle 18. The inner wall of the stepped groove 19 is fixedly installed with a damping pad 20 for anti-slip. The inner wall of the buckle 15 is fixedly installed with a silicone pad 21 for pressing against the pipe. The silicone pad 21 is fixed to the inner wall of the buckle 15, isolating the metal buckle 15 from direct contact with the outer wall of the pipe, thereby protecting the anti-corrosion layer of the outer wall of the chemical pipe from being scratched, avoiding indentations on the outer wall of the pipe due to the pressure of the buckle 15, and extending the service life of the pipe.

[0045] Here, the retaining ring 15, driven by the flipping plate 14, is parallel to the support base 6. After being inserted into the pipe, it fits against the inner groove 16 on the back wall and is inserted into the plug seat 17 at the end to form a radial lock. This restricts the rotation of the pipe in the circumferential direction, avoids the pipe's self-rotation caused by friction during the cutting process, and eliminates the spiral deviation of the cut. The retaining ring 15 and the support base 6 correspond one-to-one in the parallel state to form a multi-point positioning. Compared with the traditional two-end positioning, this increases the number of positioning points, thereby further restricting the lateral and longitudinal displacement of the pipe, ensuring that the pipe does not shake during the cutting process, and improving the positioning stability.

[0046] Furthermore, the stepped buckle 18 adopts a multi-step stepped design. When the buckle 15 is positioned parallel to the support base 6, different step positions are selected to cooperate with the stepped groove 19, thereby adapting to pipes of various diameters. The positioning requirements of different pipe diameters can be met without replacing the buckle 15, reducing the number of times the buckle 15 needs to be replaced and saving replacement time and reserve costs. The stepped buckle 18 and the stepped groove 19 adopt a "surface contact" design. When the buckle 15 is parallel to the support base 6, the contact area between the buckle and the groove is increased, thereby distributing the force on the connection parts and avoiding deformation of the buckle or groove due to concentrated force, extending the service life of the structure and improving the reliability of the connection.

[0047] Furthermore, the damping pad 20 is made of a special rubber material, which increases friction when the stepped buckle 18 engages with the slot, absorbing cutting vibrations and thus preventing the buckle from coming loose due to vibrations during the cutting process. At the same time, it reduces the impact of vibrations on pipe positioning and improves the vibration resistance of the positioning structure.

[0048] In other embodiments, in scenarios where positioning strength requirements are higher, such as cutting large-diameter thick-walled pipes, high-pressure pipes, or when the impact force during the cutting process is large, bolt holes can be opened on the end of the retaining ring 15 and the plug seat 17 respectively. When the retaining ring 15 is parallel to the support seat 6 under the drive of the flip plate 14 and is driven to descend by the hydraulic cylinder 12 so that the end is inserted into the plug seat 17, the operator can pass the bolt through the bolt hole at the end of the retaining ring 15 and the plug seat 17, and tighten it to achieve rigid locking of the two.

[0049] In this invention, the operator first starts the equipment via control cabinet 1. Based on the preset parameters of the pipe diameter and material of the pipe to be cut, the electric slide rail is adjusted to move the mounting frame 4 and the cutting piece 5 to the cutting position. Then, the pipe is placed on the linear equidistant support seat 6 of the bracket 2. The arc groove at the top of the support seat 6 fits against the outer wall of the pipe to provide initial support. When the pipe diameter is small, an adapter shim can be used to ensure that the pipe axis is horizontal. Next, the flip plate 14 is rotated by the damping hinge, so that the buckle 15 on the flip plate 14 flips to be completely parallel to the support seat 6. Then, the position of the flip plate 14 is fixed by the "friction locking structure" of the damping hinge. After that, the symmetrical hydraulic cylinder 12 is controlled by control cabinet 1 to work. The hydraulic cylinder 12 pushes the crossbar 13 to lower the flip plate 14 and the buckle 15, so that the buckle 15 fits tightly against the outer wall of the pipe and its end is inserted into the insertion seat 17 of the support seat 6. At the same time, the side wall of the buckle 15 fits against the inner groove 16 of the support seat 6 to form "radial locking". If the cutting requires high positioning strength, bolts can also be used to pass through the buckle 15. The pre-set bolt holes of the connector 17 are used for rigid locking. Then, according to the cutting requirements, the electric push rod 8 on the mounting frame 4 is controlled by the control cabinet 1. The electric push rod 8 is used to extend and retract to drive the moving plate 9 to rotate the cutting piece 5 to the preset tilt angle. The arc-shaped corner 10 of the moving plate 9 slides along the inner wall of the limit block 11 to ensure angle accuracy. Then, the linear guide rail 22 is controlled to move the connecting plate 3, the mounting frame 4 and the cutting piece 5 to the preset cutting start position of the pipeline. After the cutting piece 5 is started, the linear guide rail 22 is controlled to drive the cutting piece 5 to move at a constant speed along the pipeline axis to complete the cutting. During the process, the limit block 11 and the arc-shaped corner 10 cooperate to prevent the angle of the cutting piece 5 from deviating. The support seat 6, the retaining ring 15 and the silicone pad 21 work together to ensure that the pipeline does not shake. After the cutting is completed, the cutting piece 5 is stopped and the linear guide rail 22 is controlled to drive it to reset. Then, the hydraulic cylinder 12 is controlled to retract to make the retaining ring 15 disengage from the connector 17. If there are bolts, the bolts are removed first. Finally, the pipeline is taken out. The equipment can repeat the above process for the next cutting or shut down the equipment.

[0050] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cutting device for chemical pipelines, comprising a control cabinet (1) for controlling the operation of the equipment and a bracket (2) mounted on the control cabinet (1), characterized in that: Also includes: A connecting plate (3) is slidably mounted on a bracket (2). A mounting bracket (4) is slidably connected to the connecting plate (3) via an electric slide rail. A cutting component (5) for cutting pipes is rotatably mounted on the mounting bracket (4) via a drive component. Support seats (6) are linearly and equidistantly installed on the bracket (2) to support the pipe. The bracket (2) is equipped with a retaining element (7) for limiting the pipe.

2. The cutting device for chemical pipelines according to claim 1, characterized in that: The driving component includes an electric push rod (8) rotatably connected to a mounting bracket (4). A movable plate (9) for connecting to a cutting piece (5) is rotatably connected to the mounting bracket (4) via a rotating shaft. The output end of the electric push rod (8) is rotatably connected to the movable plate (9) via a connecting block.

3. The cutting device for chemical pipelines according to claim 2, characterized in that: The movable plate (9) is provided with an arc-shaped corner (10) near the electric push rod (8). A limiting block (11) is fixedly installed on the mounting bracket (4) at the corresponding arc-shaped corner (10). The inner wall of the limiting block (11) is in contact with the arc-shaped corner (10). When the electric push rod (8) is working, the arc-shaped corner (10) on the movable plate (9) abuts against the inner wall of the limiting block (11) to form a sliding area.

4. The cutting device for chemical pipelines according to claim 1, characterized in that: The clamping member (7) includes hydraulic cylinders (12) symmetrically mounted on the bracket (2). A crossbar (13) is provided on the bracket (2), and the two ends of the crossbar (13) are respectively bolted to the fixing plate at the output end of the corresponding hydraulic cylinder (12). When the hydraulic cylinder (12) is working, the crossbar (13) moves along its moving path.

5. A cutting device for chemical pipelines according to claim 4, characterized in that: A flip plate (14) is rotatably connected to the crossbar (13) via a damping hinge. Multiple sets of buckles (15) corresponding to the positions of the support base (6) are linearly and equidistantly arranged on the flip plate (14). The connection of the buckles (15) is fixedly installed to the connection of the flip plate (14) by bolts.

6. A cutting device for chemical pipelines according to claim 5, characterized in that: The support base (6) has an inner groove (16) that matches the size of the buckle (15) at the corresponding buckle (15). The support base (6) is symmetrically equipped with a plug seat (17) that matches the end of the buckle (15). When the end of the buckle (15) is inserted into the plug seat (17), the side wall of the buckle (15) abuts against the inner wall of the inner groove (16) and forms a locking area.

7. A cutting device for chemical pipelines according to claim 6, characterized in that: The end of the buckle (15) is provided with a stepped buckle (18) for adapting to different pipe sizes. The plug seat (17) is provided with a stepped groove (19) that matches the stepped buckle (18). The inner wall of the stepped groove (19) is fixedly installed with a damping pad (20) for anti-slip.

8. A cutting device for chemical pipelines according to claim 6, characterized in that: The inner wall of the buckle (15) is fixedly fitted with a silicone pad (21) for abutting against the pipe.

9. A cutting device for chemical pipelines according to claim 6, characterized in that: The bracket (2) is fixedly installed with a linear guide rail (22) for driving the connecting plate (3) to move, and the connection of the connecting plate (3) is fixedly installed on the output end of the linear guide rail (22).

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