A tubing cutting assembly

Abstract

This invention discloses an oil pipe cutting assembly, comprising a dual-cavity pipe nested within an oil pipe and auxiliary components. The dual-cavity pipe includes an air inlet pipe and a liquid inlet pipe nested within the air inlet pipe. The auxiliary components include a first airbag and a second airbag arranged sequentially along the oil pipe feeding direction, both of which are connected to the air inlet pipe. The outer edges of the first and second airbags are sealed against the inner wall of the oil pipe. The first airbag, the second airbag, and the inner wall of the oil pipe between the first and second airbags form a lubricating fluid receiving cavity, and the liquid inlet pipe is connected to the lubricating fluid receiving cavity. The middle part of the lubricating fluid receiving cavity is adapted to the cutting position of the cutting tool. A sealed space (lubricating fluid receiving cavity) can be formed inside the oil pipe, allowing coolant to be stored within this sealed space. This enables the coolant to exert a good cooling and lubrication effect during cutting operations, and can carry cutting debris out of the lubricating fluid receiving cavity.

Description

Technical Field

[0001] This invention belongs to the field of cutting equipment, and particularly relates to an oil pipe cutting assembly. Background Technology

[0002] In existing cutting techniques, coolant (lubricant) is sprayed onto the cutting tool from the cutting head through an external nozzle. This method has two drawbacks: First, the cooling and lubrication effects are poor, as coolant can only leak in through the kerf or be carried in by the cutting head. Second, the amount of coolant carried in is very limited, requiring a large amount of sprayed coolant or lubricant to improve cooling efficiency, leading to increased coolant consumption and hindering cost savings. Third, the coolant flows from the outside to the inside of the pipe, easily carrying a large amount of cutting debris into the pipe, necessitating subsequent cleaning of the pipe or the spray gun. Summary of the Invention

[0003] The purpose of this invention is to provide an oil pipe cutting assembly to solve the technical problems of low coolant utilization, poor performance, and the easy introduction of cutting chips into the pipe.

[0004] A tubing cutting assembly includes a dual-cavity pipe and auxiliary components nested within a tubing. The dual-cavity pipe includes an air inlet pipe and a liquid inlet pipe nested within the air inlet pipe. The auxiliary components include a first airbag and a second airbag arranged sequentially along the tubing feed direction, both of which are connected to the air inlet pipe. The outer edges of the first and second airbags are sealed against the inner wall of the tubing. The first airbag, the second airbag, and the inner wall of the tubing between the first and second airbags form a lubricating fluid receiving cavity, which is connected to the liquid inlet pipe. The middle portion of the lubricating fluid receiving cavity is adapted to the cutting position of the cutting tool. This design creates a sealed space (lubricating fluid receiving cavity) inside the tubing, allowing coolant to be stored within this sealed space. This ensures that the coolant provides good cooling and lubrication during cutting operations, and can carry cutting debris out of the lubricating fluid receiving cavity.

[0005] Furthermore, the first airbag component and the second airbag component are connected by an air passage pipe, and the first airbag component is connected to the air inlet pipe; an air inlet connecting plate for the first airbag component is provided near the cutting position of the air inlet pipe, and a first airbag mating plate, a second airbag air inlet connecting plate, and a second airbag mating plate are sequentially provided on the outer end of the first airbag air inlet connecting plate; an air inlet pipe opening is provided on the first airbag mating plate to mate and communicate with the liquid inlet pipe, and the liquid inlet pipe protrudes from the first airbag air inlet connecting plate and communicates with the liquid inlet pipe opening; the inner edge of the first airbag component is tightly fitted between the first airbag air inlet connecting plate and the first airbag mating plate; the first airbag mating plate and the second airbag connecting plate are connected by an air passage pipe; the inner edge of the second airbag component is tightly fitted between the second airbag air inlet connecting plate and the second airbag mating plate. This design allows for simultaneous inflation and deflation control of the first and second airbag components via an external air supply structure, making control and liquid supply relatively convenient. In addition, the first airbag component is connected to the air inlet pipe and is structurally integrated, allowing for synchronous adjustment of its position after pipe cutting.

[0006] Furthermore, the vent pipe is positioned at an end away from the initial cutting position of the oil pipe. This design prevents the vent pipe from being cut during the early and middle stages of the cutting operation.

[0007] Furthermore, the feed end at the cutting position is equipped with an oil pipe feeding and conveying assembly. This assembly includes a vertically arranged first connecting plate, on which a drive connecting roller is mounted. Multiple oil pipe drive wheels are rotatably connected to the side wall of the drive connecting roller. The side wall of the roller has grooves for accommodating the oil pipe drive wheels. The inner wheel surface of each oil pipe drive wheel is pressed tightly against the oil pipe, and the outer wheel surface is driven by the output end of a drive motor. The axial direction of the oil pipe drive wheel is perpendicular to the conveying direction of the oil pipe. This design allows for the conveying and positioning of the oil pipe in the feeding direction before cutting.

[0008] Furthermore, limiting portions are fixed on both sides of the oil pipe drive wheel groove. Each limiting portion contains a compression spring and a first connecting block that mates with the oil pipe drive wheel. The outer and inner ends of the compression spring abut against the limiting portion and the first connecting block, respectively, pressing the oil pipe drive wheel firmly against the outer surface of the oil pipe. The first connecting block mates with the oil pipe drive wheel and the drive motor bracket. This design allows the oil pipe drive wheel to be tightly pressed against the oil pipe surface, which is beneficial for feeding and increases friction.

[0009] Furthermore, the surface of the tubing drive wheel is provided with an inner concave wheel surface that mates with the outer surface of the tubing protrusion. This design increases the contact area and friction between the inner concave wheel surface of the tubing drive wheel and the outer surface of the tubing protrusion, thereby making the tubing's rotation efficiency around the axis higher and more stable, and the feeding more stable.

[0010] Furthermore, a guide connecting assembly is provided on the feed side of the first connecting plate. The guide connecting assembly includes a guide connecting plate, on which a guide connecting roller is mounted. Multiple oil pipe guide wheels are rotatably connected to the side wall of the guide connecting roller. An oil pipe guide wheel groove is formed on the side wall of the guide connecting roller to accommodate the oil pipe guide wheels. The inner wheel surface of the oil pipe guide wheel is tightly pressed against the oil pipe, and the axial direction of the oil pipe guide wheel is perpendicular to the conveying direction of the oil pipe. This design makes the operation of the oil pipe more stable when running along the feed direction or rotating axially.

[0011] Furthermore, the first connecting plate and the drive connecting roller are rotatably connected via bearings. The first connecting plate has a rotating hole that mates with the drive connecting roller. One end of the drive connecting roller extends out of the rotating hole and is connected to multiple oil pipe drive wheels. The other end of the drive connecting roller extends out of the rotating hole to form an oil pipe self-rotation drive wheel. The oil pipe self-rotation drive wheel and the oil pipe self-rotation motor are connected via a reduction gearbox, a synchronous pulley, and a synchronous belt to drive the oil pipe to rotate around its axis. With this design, the rotation of the drive connecting roller can drive the oil pipe to rotate around its axis, thereby isolating the final cutting position from the cutting tool and preventing the air pipe from being cut.

[0012] Furthermore, one end of the dual-lumen pipe is concealed within the oil pipe; the other end is exposed outside the oil pipe. The exposed end has an air inlet port connected to an air inlet pipe; the exposed end also has a liquid inlet port connected to a liquid inlet pipe; the liquid inlet port extends outward from its connection point with the dual-lumen pipe to block the opening at the end of the air inlet pipe; a connecting piece is provided between the air inlet pipe and the liquid inlet pipe. This design allows for air and liquid intake operations at the exposed end of the dual-lumen pipe, making these operations more convenient.

[0013] Furthermore, the exposed end is equipped with an adjustment assembly for adjusting the position of the dual-cavity pipe in the feeding direction. The adjustment assembly includes an adjustment bracket and a drive adjustment cylinder whose driving direction is parallel to the feeding direction. The adjustment bracket includes an adjustment base plate, on which a sliding connecting plate is arranged along the feeding direction. The dual-cavity pipe is slidably connected to the sliding connecting plate. The output rod of the drive adjustment cylinder is fixedly connected to the dual-cavity pipe via a pull rod block. The drive adjustment cylinder drives the dual-cavity pipe to reciprocate and slide along the feeding direction for adjustment. With this design, during cutting operations, the position of the first and second airbag components in the feeding direction can be adjusted by driving the dual-cavity pipe to reciprocate and slide along the feeding direction using the drive adjustment cylinder, thus adapting to different cutting conditions.

[0014] The advantages and beneficial effects of this invention are as follows: through such a design, a closed space (lubricating fluid containment cavity) can be formed inside the oil pipe, so that the coolant can be stored in the closed space, so that the coolant can exert a good cooling and lubrication effect during the cutting operation, and can carry the cutting debris out of the lubricating fluid containment cavity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2a This is a schematic diagram of the overall structure of the dual-cavity pipe of the present invention;

[0017] Figure 2b This is a schematic diagram of the exposed end of the dual-lumen pipe of the present invention from a side view.

[0018] Figure 2c This is a side view of the concealed end of the dual-lumen pipe of the present invention;

[0019] Figure 3 This is a schematic diagram of the auxiliary components of the present invention;

[0020] Figure 4 This is a schematic diagram of the oil pipe feeding and conveying assembly of the present invention;

[0021] Figure 5a This is a schematic diagram of the drive connection structure between the oil pipe rotation motor and the oil pipe rotation drive wheel in the oil pipe feeding and conveying assembly of the present invention.

[0022] Figure 5b This is a schematic diagram showing the connection between the limiting part and the compression spring of the present invention;

[0023] Figure 5c This is a schematic diagram of the connection structure between the transmission drive wheel and the oil pipe drive wheel of the present invention;

[0024] Figure 5d This is a schematic diagram of the concave wheel surface structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the guide connection assembly of the present invention;

[0026] Figure 7 This is a diagram of the adjustment component of the present invention;

[0027] Figure 8 This is a diagram of the external cutting device of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the lubricating fluid receiving cavity of the present invention (the black area represents the lubricating fluid).

[0029] Figure 10 This is a schematic diagram showing the contact between the oil pipe drive wheel and the surface of the oil pipe according to the present invention;

[0030] Figure 11a This is a schematic diagram of the pre-cutting state of the cutting tool and the oil pipe in Embodiment 1 of the present invention;

[0031] Figure 11b This is a schematic diagram of the early stage of the cutting stroke in Embodiment 1 of the present invention;

[0032] Figure 11c This is a schematic diagram of the oil pipe's rotation state during the later stage of the cutting stroke in Embodiment 1 of the present invention.

[0033] Explanation of markings in the diagram: 1. Oil pipe; 2. Dual-cavity pipe; 3. Auxiliary component; 31. First airbag component; 311. First airbag inlet connecting plate; 312. First airbag mating plate; 32. Second airbag component; 321. Second airbag inlet connecting plate; 322. Second airbag mating plate; 33. Air passage pipe; 34. Lubricating fluid receiving cavity; 4. Air inlet pipe; 5. Liquid inlet pipe; 6. Liquid inlet pipe opening; 7. Oil pipe feeding and conveying assembly; 71. Limiting part; 72. First connecting plate; 73. Drive connecting roller; 74. Oil pipe drive wheel; 741. Concave wheel surface; 742. Oil pipe drive wheel shaft; 75. Oil pipe drive wheel groove; 76. Guide motor bracket; 77. First connecting block; 78. Compression spring; 79. Rotating hole; 71 0. Oil pipe self-rotating motor; 711. Oil pipe self-rotating drive wheel; 712. Gearbox; 713. Synchronous belt pulley; 714. Synchronous belt; 715. Transmission drive wheel; 716. Transmission drive motor; 8. Guide connection assembly; 81. Guide connection plate; 82. Guide connection roller; 83. Oil pipe guide wheel; 84. Oil pipe guide wheel groove; 9. Hidden end; 10. Exposed end; 101. Air inlet port; 102. Liquid inlet port; 11. Connecting piece; 12. Adjusting assembly; 121. Adjusting bracket; 1211. Adjusting base plate; 1212. Sliding connecting plate; 122. Drive adjusting cylinder; 1221. Output rod; 1222. Pull rod block; 13. External cutting equipment; 131. Cutting tool; 132. External lubricant nozzle Detailed Implementation

[0034] To better understand the purpose, structure, and function of this invention, a tubing cutting assembly of this invention will be described in further detail below with reference to the accompanying drawings. Example 1:

[0035] A tubing cutting assembly includes a double-lumen pipe 2 nested within a tubing 1 and an auxiliary component 3. The double-lumen pipe 2 includes an air inlet pipe 4 and a liquid inlet pipe 5 nested within the air inlet pipe 4. The auxiliary component 3 includes a first airbag component 31 and a second airbag component 32 arranged sequentially along the feeding direction of the tubing 1, both the first airbag component 31 and the second airbag component 32 being connected to the air inlet pipe 4. The outer edges of the first airbag component 31 and the second airbag component 32 are sealed and fitted to the inner wall of the tubing 1. The first airbag component 31, the second airbag component 32, and the inner wall of the tubing 1 between the first airbag component 31 and the second airbag component 32 form a lubricating fluid receiving cavity 34. The liquid inlet pipe 5 is connected to the lubricating fluid receiving cavity 34. The middle part of the lubricating fluid receiving cavity 34 is adapted to the cutting position of the cutting tool 131.

[0036] The first airbag component 31 and the second airbag component 32 are connected by an air passage 33. The first airbag component 31 is connected to the air inlet pipe 4. A first airbag inlet connecting plate 311 is provided near the cutting position of the air inlet pipe 4. A first airbag mating plate 312, a second airbag inlet connecting plate 321, and a second airbag mating plate 322 are sequentially provided on the outer end of the first airbag inlet connecting plate 311. An inlet pipe opening is provided on the first airbag mating plate 312 to mate and communicate with the liquid inlet pipe 5. Hole 6, the liquid inlet pipe 5 protrudes from the first airbag inlet connecting plate 311 and communicates with the liquid inlet pipe opening 6; the inner edge of the first airbag component 31 is tightly fitted between the first airbag inlet connecting plate 311 and the first airbag mating plate 312 (bonded); the first airbag mating plate 312 and the second airbag inlet connecting plate 321 are connected by an air pipe 33; the inner edge of the second airbag component 32 is tightly fitted between the second airbag inlet connecting plate 321 and the second airbag mating plate 322 (bonded).

[0037] The vent pipe 33 is located at one end away from the initial cutting position of the oil pipe 1.

[0038] One end of the dual-lumen pipe 2 is a hidden end 9 inside the oil pipe 1; the other end of the dual-lumen pipe 2 is an exposed end 10 outside the oil pipe 1; the hidden end 9 has an air inlet port 101, which is connected to the air inlet pipe 4; the hidden end 22 has a liquid inlet port 102, which is connected to the liquid inlet pipe 5; the liquid inlet port 102 extends outward from the connection position with the dual-lumen pipe 2 to block the end opening of the air inlet pipe 4; a connecting piece 11 is provided between the air inlet pipe 4 and the liquid inlet pipe 5. (The internal structure of a pipe at the exposed end 10 is as follows: the liquid inlet pipe 5 is located in the middle of the pipe, and an external pipe is also sleeved on the outside of the liquid inlet pipe 5. The passage between the external pipe and the liquid inlet pipe 5 is the air inlet pipe 4. The external pipe and the liquid inlet pipe 5 are connected and supported by a connecting piece 11. The connecting piece 11 is a sheet-like structure arranged along the axial direction, and multiple pieces are arranged around the oil pipe 1 to cut the air inlet pipe 4 into multiple passages (the connection is stable and the air consumption is reduced). The connecting piece 11 is not set at the air inlet port 101 to ensure that the gas entering can enter multiple passages.)

[0039] The specific operating principle of Embodiment 1 is as follows: During cutting, firstly, the oil pipe 1 is transported to the predetermined cutting position, which is adapted to the initial cutting position of the cutter head 131. An auxiliary component 3, in cooperation with the inner wall of the oil pipe 1, forms a lubricant reservoir 34 that can temporarily store lubricant.

[0040] The inner edge of the first airbag component 31 is tightly fitted between the first airbag inlet connecting plate 311 and the first airbag mating plate 312, forming a sealing component inside the oil pipe 1. When the air inlet pipe 4 is inflated, gas is passed through to inflate the first airbag component 31, causing the first airbag component 31 to expand and its outer edge to tightly fit against the inner wall of the oil pipe 1, forming a seal. Since the first airbag mating plate 312 and the second airbag inlet connecting plate 321 are connected by an air passage 33, the inner edge of the second airbag component 32 is tightly fitted between the second airbag inlet connecting plate 321 and the first airbag mating plate 312. Between the two airbag mating plates 322, a sealing component is formed within the oil pipe 1. When the air inlet pipe 4 is inflated, gas inflates the second airbag component 32, causing it to expand and its outer edge to tightly adhere to the inner wall of the oil pipe 1, forming a seal. The first airbag mating plate 312, a portion of the sidewall of the first airbag component 31, the second airbag inlet connecting plate 321, a portion of the sidewall of the second airbag component 32, and the inner wall of the oil pipe 1 between the first airbag mating plate 312 and the second airbag inlet connecting plate 321 form a lubricating fluid receiving cavity 34. The air passage pipe 33 is located within the lubricating fluid receiving cavity 34 and is positioned away from the initial cutting position.

[0041] The first airbag mating plate 312 has an inlet pipe opening 6 that is connected to the inlet pipe 5. The lubricating fluid enters the lubricating fluid receiving cavity 34 through the inlet pipe opening 6 and fills the lubricating fluid receiving cavity 34.

[0042] Second, the cutting tool 131 begins its downward cutting. During this process, an external lubricant nozzle 132 is located on one side of the cutting tool 131, facing the initial cutting position. At the initial cut, the lubricant is sprayed onto the cutting tool 131 to cool it. When the cutting tool 131 cuts a notch in the outer wall of the oil pipe 1, coolant leaks in from the cut, continuing to cool and lubricate the cutting tool 131. When the cutting depth of the cutting tool 131 is 1-2 mm, the external lubricant nozzle 132 is closed. Because the lubricant reservoir 34 is filled with lubricant and the lubricant injection in the inlet pipe 5 is pressurized, the lubricant in the lubricant reservoir 34 overflows from the notch, cooling the cutting tool 131, lubricating the cutting position, and carrying away the cutting debris.

[0043] Third, as the cutting tool 131 continues to descend and cut, the cutting area of ​​the tool 131 within the lubricant reservoir 34 increases, and the contact area with the lubricant gradually increases, thus enhancing both the cooling and lubrication effects. Since the lubricant is contained within the lubricant reservoir 34 and can only overflow through the notch, all the lubricant must come into contact with and cool the tool 131 before overflowing from the notch, achieving a utilization rate of over 90%, a significant improvement compared to existing technologies. Example 2:

[0044] In a further optimization of Embodiment 1, an oil pipe feeding and conveying assembly 7 is provided at the feed end of the cutting position. The oil pipe feeding and conveying assembly 7 includes a vertically arranged first connecting plate 72, on which a drive connecting roller 73 is provided. Multiple oil pipe drive wheels 74 are rotatably connected to the side wall of the drive connecting roller 73. An oil pipe drive wheel groove 75 is opened on the side wall of the drive connecting roller 73 to accommodate the oil pipe drive wheels 74. The inner wheel surface of the oil pipe drive wheel 74 is pressed tightly against the oil pipe 1. The outer wheel surface of the oil pipe drive wheel 74 is driven and connected to the transmission drive wheel 715 through a transmission motor 716. The axial direction of the oil pipe drive wheel 74 is perpendicular to the conveying direction of the oil pipe 1.

[0045] Limiting portions 71 are fixed on both sides of the oil pipe drive wheel groove 75. A compression spring 78 and a first connecting block 77 that cooperates with the oil pipe drive wheel 74 are provided in the limiting portion 71. The outer end and inner end of the compression spring 78 abut against the limiting portion 71 and the first connecting block 77 respectively, pressing the oil pipe drive wheel 74 against the outer surface of the oil pipe 1. The first connecting block 77 cooperates with the oil pipe drive wheel 74 and the drive motor bracket 76.

[0046] The surface of the oil pipe drive wheel 74 is provided with an inner concave wheel surface 741 that mates with the raised outer surface of the oil pipe 1.

[0047] The first connecting plate 72 is provided with a guide connecting plate 81 on the feeding side. A guide connecting roller 82 is provided on the guide connecting plate 81. A plurality of oil pipe guide wheels 83 are rotatably connected to the side wall of the guide connecting roller 82. An oil pipe guide wheel groove 84 is opened on the side wall of the guide connecting roller 82 to accommodate the oil pipe guide wheel 83. The inner wheel surface of the oil pipe guide wheel 83 is pressed tightly against the oil pipe 1. The axial direction of the oil pipe guide wheel 83 is perpendicular to the conveying direction of the oil pipe 1.

[0048] The first connecting plate 72 is rotatably connected to the drive connecting roller 73 via bearings. The first connecting plate 72 has a rotating hole 79 that mates with the drive connecting roller 73. One end of the drive connecting roller 73 extends out of the rotating hole 79 and is connected to multiple oil pipe drive wheels 74. The other end of the drive connecting roller 73 extends out of the rotating hole 79 to form an oil pipe self-rotation drive wheel 711. The oil pipe self-rotation drive wheel 711 is driven and connected to the oil pipe self-rotation motor 710 via a reduction gearbox 712, a synchronous pulley 713, and a synchronous belt 714, thereby realizing the self-rotation of the oil pipe 1 around the axis.

[0049] The specific operating principle of Example 2: By setting up the oil pipe feeding and conveying assembly 7, the overall performance of the equipment can be improved. Specifically:

[0050] First, when the oil pipe 1 and the drive connecting roller 73 are not in contact (when no material is being loaded), the oil pipe drive wheel groove 75 is fixed with limiting parts 71 on both sides. The limiting parts 71 are provided with a compression spring 78 and a first connecting block 77 that is connected to the oil pipe drive wheel 74. The outer end and the inner end of the compression spring 78 abut against the limiting part 71 and the first connecting block 77 respectively. At this time, the oil pipe drive wheel 74 is in the initial position.

[0051] Secondly, when the oil pipe 1 is engaged with the drive connecting roller 73 (during feeding), the downward-pressing oil pipe drive wheel 74 is in close contact with the oil pipe 1. The concave wheel surfaces 741 of the four oil pipe drive wheels 74 are located on the same annular surface (inner pressure surface). The outer wall size of the oil pipe 1 is larger than the inner diameter of the inner pressure surface, pushing the four oil pipe drive wheels 74 outward. Due to the action of the compression spring 78, the oil pipe 1 is held tightly by the four oil pipe drive wheels 74. At the same time, the contact area and friction of the concave wheel surface 741 of the oil pipe drive wheel 74 relative to the convex outer surface of the oil pipe 1 become larger, thus making the feeding of the oil pipe 1 more stable.

[0052] The oil pipe 1 is clamped by an oil pipe drive wheel 74 with a wheel surface that mates with the protruding outer surface of the oil pipe 1. The oil pipe drive wheel 74 presses tightly against the oil pipe 1. The force here comes from a compression spring 78 and a first connecting block 77 set in the limiting part 71. The two ends of the compression spring 78 abut against the limiting part 71 and the first connecting block 77 respectively. At the same time, the first connecting block 77 is connected to the oil pipe drive wheel 74 through the oil pipe drive wheel shaft 717. Therefore, the oil pipe drive wheel 74 is pressed downward under normal conditions. A drive motor bracket 76 is also used in conjunction with the first connecting block 72. The drive motor bracket 76 is equipped with a transmission drive wheel 715 and a transmission motor 716. When operating, the oil pipe drive wheel 74 is compressed and retracts relative to the outer surface of the oil pipe 1, which at the same time drives the first connecting block 72 and the drive motor bracket 76 to retract simultaneously. This design ensures that the oil pipe drive wheel 74 and the transmission drive wheel 715 always maintain contact pressure.

[0053] Third, during the cutting process (in the final stage of the overall cutting, when the oil pipe 1 rotates around its axis), the oil pipe rotation drive wheel 711 is connected to the oil pipe rotation motor 710 via a reduction gearbox 712, a synchronous pulley 713, and a synchronous belt 714.

[0054] The oil pipe self-rotation motor 710 is connected to the synchronous pulley 713 via a reduction gearbox 712. The synchronous pulley 713 is driven by the oil pipe self-rotation drive wheel 711 via a synchronous belt 714. The oil pipe self-rotation drive wheel 711 and the drive connecting roller 73 are integrally set. When the drive connecting roller 73 rotates, it drives the oil pipe 1 to rotate around its axis. When the drive connecting roller 73 rotates, it drives the guide connecting roller 82 to rotate synchronously. This makes the rotation efficiency of the oil pipe 1 around its axis higher and more stable, thereby isolating the final cutting position from the cutter 131, avoiding cutting the air pipe 32, protecting the sealing of the auxiliary component 3, preventing lubricant from leaking out of the lubricant receiving cavity 34, and ensuring the full utilization of the lubricant cooling performance. Due to the limitation of the dual-cavity pipe 2, the first airbag component 31 and the second airbag component 32 remain stationary and rotate relative to the oil pipe 1. However, because the first airbag component 31 and the second airbag component 32 are in an inflated state, the sealing of the lubricant receiving cavity 34 is guaranteed. Example 3:

[0055] In a further optimization of Embodiment 1 or 2, the exposed end 10 is provided with an adjustment component 12 for adjusting the front and rear positions of the dual-cavity pipe 2 in the feeding direction. The adjustment component 12 includes an adjustment bracket 121 and a drive adjustment cylinder 122 whose driving direction is parallel to the feeding direction. The adjustment bracket 121 includes an adjustment base plate 1211, and a sliding connecting plate 1212 is provided on the adjustment base plate 1211 along the feeding direction. The dual-cavity pipe 2 is slidably connected to the sliding connecting plate 1212. The output rod 1221 of the drive adjustment cylinder 122 is fixedly connected to the dual-cavity pipe 2 through a pull rod block 1222. The drive adjustment cylinder 122 drives the dual-cavity pipe 2 to reciprocate and slide along the feeding direction for adjustment.

[0056] The specific operating principle of Example 3: The adjusting base plate 121 is fixed. One end of the driving adjusting cylinder 122 is fixedly connected to one of the sliding connecting plates 1212. The output rod 1221 of the driving adjusting cylinder 122 is connected to the double-cavity pipe 2 through the pull rod block 1222. The double-cavity pipe 2 is slidably connected to the sliding connecting plate 1212. When the output rod 1221 of the driving adjusting cylinder 122 moves forward or backward in the feeding direction, it will synchronously drive the double-cavity pipe 2 to move forward or backward in the feeding direction.

[0057] When no cutting operation is required, the dual-chamber pipe 2 can be driven back to its original position by the driving regulating cylinder 122. When a cutting operation is required, the dual-chamber pipe 2 can be driven by the driving regulating cylinder 122 to slide back and forth along the feeding direction, thereby forming a lubricating fluid receiving cavity 34 at any part of the oil pipe 1 to facilitate the cutting operation. At the same time, after the cutting operation is completed, the lubricating fluid remaining in the inlet pipe 5 can be retained by first stopping the air filling, then withdrawing the dual-chamber pipe 2 into the uncut oil pipe 1, and then refilling the air filling, thereby improving the utilization rate of the lubricating fluid. The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A tubing cutting assembly, characterized in that, The system includes a double-lumen pipe (2) nested within an oil pipe (1) and an auxiliary component (3); the double-lumen pipe (2) includes an air inlet pipe (4) and a liquid inlet pipe (5) nested within the air inlet pipe (4); the auxiliary component (3) includes a first airbag component (31) and a second airbag component (32) arranged sequentially along the feeding direction of the oil pipe (1), both the first airbag component (31) and the second airbag component (32) being connected to the air inlet pipe (4); the outer edges of the first airbag component (31) and the second airbag component (32) are sealed and fitted to the inner wall of the oil pipe (1), and the inner wall of the oil pipe (1) between the first airbag component (31), the second airbag component (32) and the first airbag component (31) and the second airbag component (32) forms a lubricating fluid receiving cavity (34), the liquid inlet pipe (5) being connected to the lubricating fluid receiving cavity (34); the middle part of the lubricating fluid receiving cavity (34) is adapted to the cutting position of the cutting tool; The first airbag component (31) and the second airbag component (32) are connected by an air passage (33), and the first airbag component (31) is connected to the air inlet pipe (4); the air inlet pipe (4) is provided with a first airbag inlet connecting plate (311) near the cutting position, and the outer end of the first airbag inlet connecting plate (311) is provided with a first airbag mating plate (312), a second airbag inlet connecting plate (321), and a second airbag mating plate (322) in sequence; the first airbag mating plate (312) is provided with an inlet that is connected to the liquid inlet pipe (5). The liquid inlet pipe (5) is protruding from the first airbag inlet connecting plate (311) and communicates with the liquid inlet pipe opening (6); the inner edge of the first airbag component (31) is tightly fitted between the first airbag inlet connecting plate (311) and the first airbag mating plate (312); the first airbag mating plate (312) and the second airbag inlet connecting plate (321) are connected by an air passage pipe (33); the inner edge of the second airbag component (32) is tightly fitted between the second airbag inlet connecting plate (321) and the second airbag mating plate (322).

2. The tubing cutting assembly according to claim 1, characterized in that, The air passage (33) is located at one end away from the initial cutting position of the oil pipe (1).

3. The tubing cutting assembly according to claim 1, characterized in that, The feed end of the cutting position is provided with an oil pipe feed conveying assembly (7). The oil pipe feed conveying assembly (7) includes a vertically arranged first connecting plate (72). A drive connecting roller (73) is provided on the first connecting plate (72). Multiple oil pipe drive wheels (74) are rotatably connected to the side wall of the drive connecting roller (73). An oil pipe drive wheel groove (75) for accommodating the oil pipe drive wheel (74) is opened on the side wall of the drive connecting roller (73). The inner wheel surface of the oil pipe drive wheel (74) is pressed tightly against the oil pipe (1). The outer wheel surface of the oil pipe drive wheel (74) is driven and connected to the output end of the drive motor. The axial direction of the oil pipe drive wheel (74) is perpendicular to the conveying direction of the oil pipe (1).

4. The tubing cutting assembly according to claim 3, characterized in that, The oil pipe drive wheel groove (75) has a limiting part (71) fixed on both sides. The limiting part (71) is provided with a compression spring (78) and a first connecting block (77) that cooperates with the oil pipe drive wheel (74). The outer end and inner end of the compression spring (78) abut against the limiting part (71) and the first connecting block (77) respectively, pressing the oil pipe drive wheel (74) against the outer surface of the oil pipe (1). The first connecting block (77) cooperates with the oil pipe drive wheel (74) and the drive motor bracket (76).

5. The tubing cutting assembly according to claim 3 or 4, characterized in that, The surface of the oil pipe drive wheel (74) is provided with an inner concave wheel surface (741) that mates with the raised outer surface of the oil pipe (1).

6. The tubing cutting assembly according to claim 3, characterized in that, The first connecting plate (72) is provided with a guide connecting assembly (8) on the feed side. The guide connecting assembly (8) is provided with a guide connecting plate (81). The guide connecting plate (81) is provided with a guide connecting roller (82). The side wall of the guide connecting roller (82) is rotatably connected with a plurality of oil pipe guide wheels (83). The side wall of the guide connecting roller (82) is provided with an oil pipe guide wheel groove (84) for accommodating the oil pipe guide wheel (83). The inner wheel surface of the oil pipe guide wheel (83) is pressed tightly against the oil pipe (1). The axial direction of the oil pipe guide wheel (83) is perpendicular to the conveying direction of the oil pipe (1).

7. The tubing cutting assembly according to claim 3, characterized in that, The first connecting plate (72) is rotatably connected to the drive connecting roller (73) through a bearing. The first connecting plate (72) has a rotating hole (79) that cooperates with the drive connecting roller (73). One end of the drive connecting roller (73) extends out of the rotating hole and is connected to multiple oil pipe drive wheels (74). The other end of the drive connecting roller (73) extends out of the rotating hole (79) to form an oil pipe self-rotation drive wheel (711). The oil pipe self-rotation drive wheel (711) and the oil pipe self-rotation motor (710) are driven and connected through a reduction gearbox (712), a synchronous pulley (713), and a synchronous belt (714) to realize the self-rotation of the oil pipe (1) around the axis.

8. The tubing cutting assembly according to claim 1, characterized in that, One end of the dual-cavity pipe (2) is a hidden end (9) inside the oil pipe (1); the other end of the dual-cavity pipe (2) is an exposed end (10) outside the oil pipe (1); the exposed end (10) is provided with an air inlet port (101), which is connected to the air inlet pipe (4); the exposed end (10) is provided with a liquid inlet port (102), which is connected to the liquid inlet pipe (5); the liquid inlet port (102) extends outward from the connection position with the dual-cavity pipe (2) to block the end opening of the air inlet pipe (4); a connecting piece (11) is provided between the air inlet pipe (4) and the liquid inlet pipe (5).

9. The tubing cutting assembly according to claim 8, characterized in that, The exposed end (10) is provided with an adjustment component (12) for adjusting the position of the dual-cavity pipe (2) in the feeding direction. The adjustment component (12) includes an adjustment bracket (121) and a drive adjustment cylinder (122) whose driving direction is parallel to the feeding direction. The adjustment bracket (121) includes an adjustment base plate (1211). A sliding connecting plate (1212) is provided on the adjustment base plate (1211) along the feeding direction. The dual-cavity pipe (2) is slidably connected to the sliding connecting plate (1212). The output rod (1221) of the drive adjustment cylinder (122) is fixedly connected to the dual-cavity pipe (2) through a pull rod block (1222). The drive adjustment cylinder (122) drives the dual-cavity pipe (2) to slide back and forth along the feeding direction for adjustment.

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