Continuous wire super-long pipe sizing cutting equipment

Abstract

The application relates to the technical field of continuous line super-long pipe fixed-length cutting, in particular to a continuous line super-long pipe fixed-length cutting equipment, which comprises a cutting table, a roller conveying mechanism and a belt conveying mechanism installed on the left side of the cutting table, a cutting blade connected to the rear of the cutting table, a fixed seat and a moving seat installed on the upper side of the cutting table from left to right, a suspension rod fixedly penetrated in the fixed baffle, a regulation and control assembly installed in the suspension rod, and a protection assembly installed on the left side of the regulation and control assembly and used for avoiding deformation of the continuous line super-long pipe. The continuous line super-long pipe fixed-length cutting equipment is characterized in that the support plates outside the two groups of sleeve blocks are moved outward, so that the support plates can contact and support the inner wall of the continuous line super-long pipe with thin wall thickness, the local collapse and deformation of the thin-wall steel pipe caused by the cutting blade during cutting are avoided, the cutting incision is not uneven or has no size deviation, therefore, the cutting precision can be improved, the pipe material waste is avoided, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of continuous line ultra-long tube fixed-length cutting technology, specifically to a continuous line ultra-long tube fixed-length cutting device. Background Technology

[0002] With the rapid development of the manufacturing industry, the application of continuous ultra-long stainless steel pipes in various fields is becoming increasingly widespread. When using ultra-long pipes, intelligent fixed-length cutting is required to meet different length requirements. Therefore, the use of continuous ultra-long pipe fixed-length cutting equipment is particularly important. For example, the prior art patent application with publication number "CN121423690A" entitled "A Precision Cutting Device for Stainless Steel Pipes in Cold Rolling Mills" discloses a method that involves setting up a clamping part, activating an electric telescopic rod, whose output shaft pushes a rectangular slide plate to slide within a support. The rectangular slide plate drives a cylindrical slide rod to move via an inclined groove, causing a square slider to move towards the center along a rectangular guide groove. This, in turn, causes a clamping plate to center and clamp the steel pipe via a rectangular box. When released, the electric telescopic rod retracts, and through reverse transmission, the clamping plate moves away from the steel pipe. Utilizing the inclined groove transmission and guide structure, the steel pipe is automatically centered and fixed, preventing pipe displacement during cutting and ensuring cutting stability. Another example is the prior art patent application with publication number "CN119115052A" entitled "An Automatic Cutting Device for Thin-Walled Steel Pipes." The method disclosed describes how, when a thin-walled steel pipe needs to be precisely cut, it is first placed on the surface of a conveyor belt. The pipe passes through the through-hole of a limiting plate and is then placed on the surface of an arc-shaped frame. The limiting plate and the arc-shaped frame support the pipe. If the pipe needs to be cut at an angle, the operator starts a stepper motor, which drives a rotating shaft to rotate slowly. As the shaft rotates, it drives the drive gear to rotate simultaneously. Since the driven gear meshes with the drive gear, it drives the turntable to rotate. As the turntable rotates, it moves an indicator above the scale to determine the required rotation angle. Because the thin-walled steel pipe is on the surface of the arc-shaped frame and is limited by the limiting plate, two sets of electric push rods are activated, causing two sets of positioning plates to be moved closer to the upper surface of the thin-walled steel pipe and pressed against it.

[0003] The cutting equipment in the prior art uses an arc frame and a positioning plate to press and clamp the outer side of the thin-walled steel pipe during cutting, without providing auxiliary support for the inner wall of the thin-walled steel pipe. Due to the thin wall thickness of the thin-walled steel pipe, the cutting force during cutting can cause local collapse and deformation of the thin-walled steel pipe, resulting in uneven cuts or dimensional deviations, which in turn affects the cutting accuracy, leading to poor cutting error, waste of pipe material, and increased production costs. Therefore, we propose a continuous line ultra-long pipe fixed-length cutting equipment to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous line ultra-long pipe length cutting device to solve the problems mentioned in the background art. In the existing cutting equipment, the outer side of the thin-walled steel pipe is pressed and adhered by the cooperation of the arc frame and the positioning plate during cutting, but the inner side of the thin-walled steel pipe is not supported. Because the wall thickness of the thin-walled steel pipe is relatively thin, the cutting force during cutting will cause local collapse and deformation of the thin-walled steel pipe, resulting in uneven cuts or dimensional deviations, which in turn affects the cutting accuracy, resulting in poor cutting error, waste of pipe material, and increased production costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a continuous ultra-long tube fixed-length cutting device, comprising a cutting table and a roller conveyor mechanism and a belt conveyor mechanism installed on its left side. A cutting blade is connected to the rear of the cutting table, and a fixed seat and a movable seat are installed sequentially from left to right above the cutting table. Both the fixed seat and the movable seat are internally connected to clamping components for fixing the continuous ultra-long tube. A fixed baffle is fixed to the upper right side of the movable seat, and a suspension rod is fixedly fixed through the fixed baffle. An adjustment component is installed inside the suspension rod, and a protective component for preventing deformation of the continuous ultra-long tube is installed on the left side of the adjustment component.

[0006] Preferably, a belt conveyor is provided on the front side of the roller conveyor mechanism, and the length of the roller conveyor mechanism is less than the length of the belt conveyor mechanism.

[0007] Preferably, an electric push rod is mounted on the rear of the cutting table via a bracket, and a support base is fixed to the output end of the electric push rod. A cutting blade is mounted above the support base, and an extension plate is fixed to the upper right side of the support base. The right side of the extension plate is an inclined surface.

[0008] Preferably, the clamping assembly includes a clamping collar that is rotatably mounted inside the fixed seat and the movable seat, and an adjusting screw is threadedly connected to the upper surface of the clamping collar. The lower end of the adjusting screw is rotatably connected to an extrusion block located inside the clamping collar. A support block is installed inside the clamping collar below the extrusion block. Both the support block and the extrusion block are arc-shaped. The fixed seat is screwed to the cutting table. A threaded rod is installed in a slot on the upper surface of the cutting table. A threaded rod is threadedly connected to the bottom surface of the movable seat.

[0009] Preferably, a transmission gear is fixed to the outer side of the clamping collar installed inside the movable seat, and a drive gear is installed on the movable seat located in front of the transmission gear. The drive gear meshes with the transmission gear, and a conveying roller is installed above the front side of the cutting table.

[0010] Preferably, the control component includes a first piston assembly that is sealed and slidably connected inside the suspension rod, and the suspension rod is hollow inside. A movable column is fixed to the right end of the first piston assembly, and the left end of the first piston assembly is sealed and slidably connected to the left end of the suspension rod. Two sets of sleeve blocks are installed on the outer side of the left end of the first piston assembly. An extension plate is provided on the right side of the movable column, and the movable column forms a left-right sliding structure through the extension plate.

[0011] Preferably, the right outer side of the first piston assembly has a through hole, and the interior of the first piston assembly is hollow.

[0012] Preferably, the protective component includes a fixing tube installed on the outer side of the sleeve block, and the interior of the fixing tube is connected to the second piston assembly via a connecting spring. A support plate is fixed to the outer end of the second piston assembly, and a connecting tube is installed at one end of the fixing tube near the first piston assembly. The other end of the connecting tube is connected to the interior of the first piston assembly.

[0013] Preferably, a laser rangefinder is fixed to the left side of the fixed baffle.

[0014] Preferably, a pressure sensor is mounted on the outer side of the support plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: this continuous line ultra-long pipe length cutting equipment avoids local collapse and deformation of thin-walled steel pipes caused by the cutting blade during cutting, and avoids uneven cuts or dimensional deviations. Therefore, it can improve cutting accuracy, avoid pipe waste, and reduce production costs. The specific details are as follows: (1) By moving the support plates on the outer side of the two sets of sleeve blocks outward, the support plates can make contact support on the inner wall of the thin-walled continuous ultra-long pipe, avoiding the local collapse and deformation of the thin-walled steel pipe caused by the cutting blade during cutting, avoiding uneven cuts or dimensional deviations, thus improving the precision of intelligent cutting, avoiding pipe waste, and reducing production costs. By using the left side of the fixed baffle to block the right end of the continuous long tube, the cutting blade can continuously cut the continuous long tube to a fixed length. At the same time, the laser rangefinder can detect whether there is a gap between the right end of the continuous long tube and the left side of the fixed baffle. If a gap exists, the laser rangefinder will detect that the minimum distance between the laser rangefinder and the continuous long tube has increased, indicating that the cut of the continuous long tube is uneven, the cut is skewed, and the perpendicularity of the cut is not up to standard. The laser rangefinder transmits this signal to the PLC intelligent controller, which controls the alarm to sound so that the staff can discover the problem in time and further improve the cutting quality of the cutting equipment. (2) When the continuous ultra-long tube is being cut by rotation, if the pressure sensor detects that the pressure is too high, it means that the continuous ultra-long tube has been deformed and dented due to high temperature or other factors. Therefore, it is possible to detect whether the continuous ultra-long tube is deformed in time, so as to avoid damage to the cutting equipment and improve the service life of the cutting equipment. (3) Furthermore, when the support seat moves the cutting blade forward, it will move the extension plate forward as well. This will cause the inclined surface of the extension plate to exert a leftward thrust on the moving column. The moving column will move the first piston assembly to the left, allowing the gas inside the left side of the suspension rod to enter the hollow first piston assembly through the through hole. This allows the gas to enter the fixed pipe through the connecting pipe, causing the second piston assembly to move the support plate outward. The operation is convenient and does not require supporting the inner wall of the continuous ultra-long pipe before cutting. Therefore, the cutting efficiency can be improved. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the electric actuator of the present invention; Figure 4 This is a top view of the cutting table structure of the present invention; Figure 5 This is a schematic diagram of the connection structure between the movable seat and the threaded rod of the present invention; Figure 6 This is a schematic cross-sectional view of the clamping collar structure of the present invention; Figure 7 This is a schematic cross-sectional view of the suspension rod structure of the present invention; Figure 8 This is a schematic cross-sectional view of the connection between the first piston assembly and the sleeve block of the present invention; Figure 9 This is a schematic diagram of the left-side structure of the fixed baffle in Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the support plate structure from below in Embodiment 3 of the present invention.

[0017] In the diagram: 1. Cutting table; 2. Roller conveyor mechanism; 3. Belt conveyor mechanism; 4. Cutting blade; 5. Electric push rod; 6. Support base; 7. Extension plate; 8. Fixed base; 9. Moving base; 10. Clamping collar; 101. Adjusting screw; 102. Extrusion block; 103. Support block; 11. Threaded rod; 12. Transmission gear; 13. Drive gear; 14. Conveying roller; 15. Fixed baffle; 151. Laser rangefinder; 16. Suspension rod; 17. Moving column; 18. First piston assembly; 181. Through hole; 19. Sleeve block; 20. Connecting pipe; 21. Fixed pipe; 211. Second piston assembly; 212. Connecting spring; 213. Support plate; 214. Pressure sensor. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-10 The present invention provides the following technical solution: Example 1: The continuous-line ultra-long pipe cutting equipment in this example can avoid local collapse and deformation of thin-walled steel pipes caused by the cutting blade 4 during cutting, avoid uneven cuts or dimensional deviations, improve cutting accuracy, avoid pipe waste, and reduce production costs. For specific structure details, please refer to the attached diagram. Figures 1-8 As shown, the device includes a cutting table 1 and a roller conveyor mechanism 2 and a belt conveyor mechanism 3 installed on its left side. A cutting blade 4 is connected to the rear of the cutting table 1. A fixed seat 8 and a movable seat 9 are installed on the top of the cutting table 1 from left to right. Both the fixed seat 8 and the movable seat 9 are connected to clamping components for fixing the continuous line of extra-long tubes. A fixed baffle 15 is fixed on the upper right side of the movable seat 9. A suspension rod 16 is fixed through the fixed baffle 15. An adjustment component is installed inside the suspension rod 16. A protective component for preventing deformation of the continuous line of extra-long tubes is installed on the left side of the adjustment component. A belt conveyor mechanism 3 is set in front of the roller conveyor mechanism 2. The length of the roller conveyor mechanism 2 is less than the length of the belt conveyor mechanism 3. An electric push rod 5 is installed behind the cutting table 1 by a bracket. A support seat 6 is fixed at the output end of the electric push rod 5. A cutting blade 4 is installed on the top of the support seat 6. An extension plate 7 is fixed on the upper right side of the support seat 6. The right side of the extension plate 7 is an inclined surface.

[0020] The clamping assembly includes a clamping collar 10 that is rotatably mounted inside a fixed seat 8 and a movable seat 9. An adjusting screw 101 is threadedly connected to the upper surface of the clamping collar 10, and the lower end of the adjusting screw 101 is rotatably connected to a pressing block 102 located inside the clamping collar 10. A support block 103 is installed inside the clamping collar 10 below the pressing block 102. Both the support block 103 and the pressing block 102 are arc-shaped. The fixed seat 8 is screwed onto the cutting table 1. A threaded rod 11 is slotted on the upper surface of the cutting table 1, and a threaded rod 11 is threadedly connected to the bottom surface of the movable seat 9. A transmission gear 12 is fixed to the outer side of the clamping collar 10 installed inside the movable seat 9. A drive gear 13 is installed on the movable seat 9 in front of the transmission gear 12, and the drive gear 13 meshes with the transmission gear 12. A conveying roller 14 is installed above the front side of the cutting table 1. The control assembly includes a first... The piston assembly 18 and the suspension rod 16 are hollow inside. The right end of the first piston assembly 18 is fixed with a movable column 17. The left end of the first piston assembly 18 is connected to the left end of the suspension rod 16 through a sealed sliding connection. Two sets of sleeve blocks 19 are installed on the outer side of the left end of the first piston assembly 18. An extension plate 7 is provided on the right side of the movable column 17. The movable column 17 forms a left-right sliding structure through the extension plate 7. A through hole 181 is opened on the outer side of the right end of the first piston assembly 18. The interior of the first piston assembly 18 is hollow. The protective component includes a fixing tube 21 installed on the outer side of the sleeve block 19. The interior of the fixing tube 21 is connected to the second piston assembly 211 through a connecting spring 212. A support plate 213 is fixed on the outer end of the second piston assembly 211. A connecting tube 20 is installed on one end of the fixing tube 21 near the first piston assembly 18. The other end of the connecting tube 20 is connected to the interior of the first piston assembly 18.

[0021] First, the continuous long tube is conveyed to the fixed seat 8 and the movable seat 9 by the roller conveyor mechanism 2. When the right end of the continuous long tube comes into contact with the left side of the fixed baffle 15, the conveying operation of the roller conveyor mechanism 2 is stopped. Therefore, the contact and blocking of the right end of the continuous long tube by the left side of the fixed baffle 15 allows the cutting blade 4 to continuously cut the continuous long tube according to a fixed length. Then, the bottom surface of the continuous long tube comes into contact with the support block 103 in the clamping sleeve 10 in the fixed seat 8 and the movable seat 9. Then, the adjusting screw 101 is manually rotated. Since the adjusting screw 101 is threadedly connected to the clamping sleeve 10 and the adjusting screw 101 is bearing connected to the extrusion block 102, the adjusting screw 101 rotates while driving the extrusion block 102 to move downward. Then, the extrusion block 102 applies downward pressure to the continuous long tube on the support block 103. The outer side of the continuous long tube is clamped and fixed by the cooperation of the extrusion block 102 and the support block 103.

[0022] Then, the electric push rod 5 is started by the PLC intelligent controller inside the cutting equipment. The output end of the electric push rod 5 drives the support base 6, the cutting blade 4, and the extension plate 7 to move forward together. At this time, the inclined surface on the right side of the extension plate 7 applies a leftward thrust to the moving column 17. The moving column 17 drives the first piston assembly 18 to move to the left. The first piston assembly 18 drives the two sets of sleeve blocks 19 to move to the left, so that the two sets of sleeve blocks 19 are located on the left and right sides of the cutting blade 4, respectively. Since the left end of the first piston assembly 18 and the left end of the suspension rod 16 are connected by a through-sealed sliding connection, the gas inside the left side of the suspension rod 16 can be squeezed into the through hole 181 when the first piston assembly 18 moves to the left. Inside, gas enters the hollow first piston assembly 18 through the through hole 181. Then, the gas inside the first piston assembly 18 is diverted to multiple fixed pipes 21 through the connecting pipe 20. This causes the gas in the fixed pipes 21 to push the second piston assembly 211 outward. The connecting spring 212 stores the energy, and the outer end of the second piston assembly 211 drives the arc-shaped support plate 213 outward. This allows the outer side of the support plate 213 to contact and support the inner wall of the thin-walled continuous ultra-long pipe. Therefore, it can prevent the cutting blade 4 from causing local collapse and deformation of the thin-walled steel pipe during cutting, avoid uneven cuts or dimensional deviations, improve cutting accuracy, avoid pipe waste, and reduce production costs.

[0023] Then, after the cutting blade 4 moves to a certain position, it stops moving forward. The motor on the right side of the cutting blade 4 drives it to rotate and perform cutting operations. At the same time, the shaft end of the drive gear 13 is connected to an external motor, which drives the drive gear 13 to rotate. The drive gear 13 drives the transmission gear 12 to rotate, and the drive gear 13 drives the clamping ring 10 inside the moving seat 9 to rotate. This causes the clamping ring 10 to rotate the continuous long tube. At this time, the cutting blade 4 will not contact the first piston assembly 18 between the two sleeve blocks 19, so that the cutting blade 4 can effectively position the continuous long tube. During the cutting process, the first piston assembly 18 and the sleeve block 19 will not rotate with the continuous ultra-long tube. After the cutting is completed, as shown above, the cutting blade 4 moves backward, and the extension plate 7 also moves backward. At this time, the second piston assembly 211 and the support plate 213 are automatically driven to move inward by the stored force of the connecting spring 212, releasing the support plate 213 from the inner wall of the continuous ultra-long tube. At the same time, the gas in the first piston assembly 18 returns to the left side of the suspension rod 16, causing the gas to push the first piston assembly 18 to move to the right. Then, the first piston assembly 18 drives the two sets of sleeve blocks 19 to move to the right side of the cutting blade 4.

[0024] Next, the motor inside the cutting table 1 is started to drive the threaded rod 11 to rotate. When the threaded rod 11 rotates, it drives the movable seat 9 connected by the outer thread to move forward. Then, the adjusting screw 101 is manually rotated in the opposite direction to release the clamping operation of the extrusion block 102. Then, the motor inside the cutting table 1 is started to drive the conveyor roller 14 to rotate, so that the conveyor roller 14 conveys the pipe cut to the specified length to the belt conveyor mechanism 3. Then, the pipe cut to the specified length is conveyed to the left through the belt conveyor mechanism 3. Then, the movable seat 9 is moved backward to reset and the next cutting operation is carried out.

[0025] Example 2: The continuous ultra-long tube cutting equipment in this example, based on Example 1, can detect whether the cut of the continuous ultra-long tube is flat. See attached diagram for the specific structure. Figure 9 As shown, a laser rangefinder 151 is fixed to the left side of the fixed baffle 15.

[0026] When the right end of the continuous long tube comes into contact with the left side of the fixed baffle 15, and the continuous long tube is rotating and cutting, the laser rangefinder 151 can detect whether there is a gap between the right end of the continuous long tube and the left side of the fixed baffle 15. If there is a gap, the laser rangefinder 151 will detect that the shortest distance between itself and the continuous long tube has increased, indicating that the cut of the continuous long tube is uneven, the cut is skewed, and the perpendicularity of the cut is not up to standard. The laser rangefinder 151 transmits this signal to the PLC intelligent controller, which controls the alarm to sound so that the staff can discover the problem in time and further improve the cutting quality of the cutting equipment.

[0027] Example 3: The continuous ultra-long tube cutting equipment in this example, based on Example 1, can intelligently detect whether the continuous ultra-long tube is deformed in a timely manner, avoiding damage to the cutting equipment. See attached diagram for the specific structure. Figure 10 As shown, a pressure sensor 214 is mounted on the outer side of the support plate 213.

[0028] When the continuous ultra-long tube is being cut by rotation, the first piston assembly 18 and the sleeve block 19 will not rotate with the continuous ultra-long tube. When the pressure sensor 214 on the outside of the support plate 213 does not detect pressure, it indicates that the continuous ultra-long tube has not been locally deformed or dented due to high temperature or other factors during the rotational cutting. When the pressure sensor 214 on the outside of the support plate 213 detects a large pressure, it indicates that the continuous ultra-long tube has been locally deformed or dented due to high temperature or other factors during the rotational cutting. The deformed or dented part comes into contact with the pressure sensor 214, thus causing the pressure sensor 214 to be subjected to a large pressure. The pressure sensor 214 transmits this signal to the PLC intelligent controller, which controls the alarm to sound so that the staff can discover it in time. This allows for timely detection of whether the continuous ultra-long tube is deformed, avoiding damage to the cutting equipment and completing a series of tasks.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous line ultra-long tube fixed-length cutting device, comprising a cutting table (1) and a roller conveyor mechanism (2) and a belt conveyor mechanism (3) installed on its left side, characterized in that: The cutting table (1) is connected to a cutting blade (4) at the rear. A fixed seat (8) and a movable seat (9) are installed on the upper part of the cutting table (1) from left to right. Both the fixed seat (8) and the movable seat (9) are connected to a clamping assembly for fixing the continuous long tube. A fixed baffle (15) is fixed on the upper right side of the movable seat (9). A suspension rod (16) is fixed through the fixed baffle (15). An adjustment assembly is installed inside the suspension rod (16). A protective assembly for preventing deformation of the continuous long tube is installed on the left side of the adjustment assembly.

2. The continuous line ultra-long tube fixed-length cutting equipment according to claim 1, characterized in that: A belt conveyor (3) is provided on the front side of the roller conveyor (2), and the length of the roller conveyor (2) is less than the length of the belt conveyor (3).

3. The continuous line ultra-long tube fixed-length cutting equipment according to claim 1, characterized in that: An electric push rod (5) is mounted on the back of the cutting table (1) via a bracket, and a support base (6) is fixed to the output end of the electric push rod (5). A cutting blade (4) is mounted on the top of the support base (6), and an extension plate (7) is fixed on the upper right side of the support base (6). The right side of the extension plate (7) is an inclined surface.

4. The continuous line ultra-long tube fixed-length cutting equipment according to claim 1, characterized in that: The clamping assembly includes a clamping collar (10) that is rotatably installed inside the fixed seat (8) and the movable seat (9). An adjusting screw (101) is threaded through the upper surface of the clamping collar (10). The lower end of the adjusting screw (101) is rotatably connected to an extrusion block (102) located inside the clamping collar (10). A support block (103) is installed inside the clamping collar (10) below the extrusion block (102). Both the support block (103) and the extrusion block (102) are arc-shaped. The fixed seat (8) is screwed to the cutting table (1). A threaded rod (11) is installed in a slot on the upper surface of the cutting table (1). A threaded rod (11) is threaded through the bottom surface of the movable seat (9).

5. The continuous line ultra-long tube fixed-length cutting equipment according to claim 1, characterized in that: The outer side of the clamping collar (10) installed inside the movable seat (9) is fixed with a transmission gear (12), and a drive gear (13) is installed on the movable seat (9) located in front of the transmission gear (12). The drive gear (13) meshes with the transmission gear (12), and a conveying roller (14) is installed above the front side of the cutting table (1).

6. The continuous line ultra-long tube fixed-length cutting equipment according to claim 3, characterized in that: The control component includes a first piston assembly (18) that is sealed and slidably connected inside the suspension rod (16), and the interior of the suspension rod (16) is hollow. A movable column (17) is fixed to the right end of the first piston assembly (18). The left end of the first piston assembly (18) is sealed and slidably connected to the left end of the suspension rod (16). Two sets of sleeves (19) are installed on the outer side of the left end of the first piston assembly (18). An extension plate (7) is provided on the right side of the movable column (17). The movable column (17) forms a left-right sliding structure through the extension plate (7).

7. A continuous line ultra-long tube fixed-length cutting device according to claim 6, characterized in that: The right end of the first piston assembly (18) has a through hole (181) on its outer side, and the interior of the first piston assembly (18) is hollow.

8. A continuous line ultra-long tube fixed-length cutting device according to claim 6, characterized in that: The protective assembly includes a fixing tube (21) installed on the outer side of the sleeve block (19), and the interior of the fixing tube (21) is connected to the second piston assembly (211) via a connecting spring (212). The outer end of the second piston assembly (211) is fixed with a support plate (213), and a connecting tube (20) is installed at one end of the fixing tube (21) near the first piston assembly (18), and the other end of the connecting tube (20) is connected to the interior of the first piston assembly (18).

9. A continuous line ultra-long tube fixed-length cutting device according to claim 1, characterized in that: A laser rangefinder (151) is fixed on the left side of the fixed baffle (15).

10. A continuous line ultra-long tube fixed-length cutting device according to claim 8, characterized in that: A pressure sensor (214) is installed on the outer side of the support plate (213).

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