Pipe fitting device and take-up system

Abstract

The application provides a pipe device and a take-up system. The pipe device comprises an outer pipe, an inner pipe, a first sealing element, a second sealing element and an exhaust joint. The outer pipe is provided with a first inner cavity, the inner pipe is movably arranged in the first inner cavity, and the inner pipe is provided with a second inner cavity. The first sealing element is arranged in the second inner cavity and is sealingly connected with the inner surface of the pipe wall of the inner pipe to divide the second inner cavity into an exhaust cavity and a non-exhaust cavity. The exhaust cavity is located on the distal side of the first sealing element. The inner pipe is provided with an exhaust hole in the radial direction thereof, and the exhaust hole is communicated with the first inner cavity and the exhaust cavity. The second sealing element is located on the proximal side of the first sealing element, and the second sealing element is used for sealing the proximal side of the first inner cavity. The exhaust joint is located on the distal side of the second sealing element, the exhaust joint is communicated with the first inner cavity, and the exhaust joint is used for being communicated with an exhaust pipe. The pipe device provided by the application can exhaust the gas in the first inner cavity and the exhaust cavity through one exhaust operation.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to a tubular device and a take-up system. Background Technology

[0002] In recent years, the treatment of valvular heart disease through minimally invasive transcatheter intervention has become a research hotspot. Before intervention, medical devices used in minimally invasive transcatheter intervention generally require air purging. This is to prevent air trapped inside the device from entering the body and causing air embolism. Furthermore, because blood in the body has a certain pressure, if a large amount of air occupies the space inside the valve repair device, a significant amount of blood may enter the device, causing blood loss.

[0003] Transcatheter minimally invasive interventional medical devices typically consist of at least two sleeved tubes, each with a handle at its proximal end for rotation or retraction. Each tube must have a sealed venting device at its proximal end to expel air from its lumen, preventing air from entering the venous system via the bloodstream and causing air embolism. However, current medical devices require individual operation of the venting device on each tube to expel air, which is cumbersome, time-consuming, and results in slow venting speed. Summary of the Invention

[0004] This application provides a pipe fitting device and a cable take-up system including the pipe fitting device. The pipe fitting device and cable take-up system provided by this application have fast venting speed and are easy to operate.

[0005] In a first aspect, embodiments of this application provide a pipe fitting device. The pipe fitting device includes an outer pipe, an inner pipe, a first sealing element, a second sealing element, and an exhaust connector. The outer pipe has a first inner cavity, and the inner pipe is movably inserted into the first inner cavity. The inner pipe also has a second inner cavity. The first sealing element is disposed in the second inner cavity and is sealingly connected to the inner surface of the inner pipe wall to divide the second inner cavity into an exhaust chamber and a non-exhaust chamber. The exhaust chamber is located at the distal end of the first sealing element. The inner pipe wall has an exhaust hole that connects the first inner cavity and the exhaust chamber. The second sealing element is located at the proximal end of the first sealing element and is used to seal the proximal end of the first inner cavity. The exhaust connector is located at the distal end of the second sealing element and connects to the first inner cavity. The exhaust connector is used to connect to an exhaust pipe.

[0006] In some embodiments, the inner tube includes a first tube body, a second tube body, and a connecting tube. The connecting tube has a connecting cavity and a receiving groove sequentially formed from its distal end to its proximal end. A first sealing element is disposed in the receiving groove and is sealed to the inner surface of the connecting tube wall to block the communication between the receiving groove and the connecting cavity. The distal end of the connecting tube is sealed to the first tube body, and the distal end of the second tube body passes through the receiving groove and is sealed to the connecting tube. The exhaust chamber includes the cavity of the first tube body and the connecting cavity, with the cavity of the first tube body communicating with the connecting cavity. The non-exhaust chamber includes the cavity of the second tube body.

[0007] In some embodiments, the vent is located in the connecting pipe and communicates with the cavity of the connecting pipe; or the vent is located in the first pipe body and communicates with the cavity of the first pipe body.

[0008] In some embodiments, the inner tube further includes a connecting shaft, the proximal end of which is sealed to the second tube body, and the distal end of which is inserted into a receiving groove and sealed to the connecting tube, with a first seal located between the bottom wall of the receiving groove and the distal wall of the connecting shaft.

[0009] In some embodiments, the exhaust connector is provided with an exhaust channel and a connecting groove surrounding the exhaust channel, the pipe wall at one end of the exhaust pipe is inserted into the connecting groove, the cavity of the exhaust pipe is connected to the exhaust channel, and the exhaust channel is connected to the first inner cavity.

[0010] In some embodiments, the pipe fitting device further includes a sealing seat, which has a first through hole and a second through hole sequentially formed from the distal end to the proximal end. The diameter of the second through hole is larger than that of the first through hole. The proximal end of the outer pipe passes through the first through hole and is sealed to the sealing seat. The second sealing element fills and seals the second through hole.

[0011] In some embodiments, the sealing seat forms a first stepped surface at the connection between the first through hole and the second through hole, and the fitting device further includes a fixing member connected to the proximal end of the sealing seat to press the second seal between the first stepped surface and the fixing member.

[0012] In some embodiments, the first through hole includes a connected mounting hole and a through hole, the diameter of the through hole being smaller than the diameter of the mounting hole, the sealing seat forming a second stepped surface at the connection between the mounting hole and the through hole, and the proximal end of the outer tube passing through the mounting hole and abutting against the second stepped surface.

[0013] In some embodiments, the first seal is a flexible gasket or a sealing bulb; the second seal is a flexible gasket or a sealing bulb.

[0014] In some embodiments, the second seal has an inner tube through hole, through which the inner tube passes and fills to seal the inner tube through hole.

[0015] In some embodiments, the tubular device further includes an elongated rod, the first seal having a rod through-hole, the elongated rod being movably inserted into the second inner cavity and filling and sealing the rod through-hole after passing through it.

[0016] Secondly, embodiments of this application provide a take-up system. The take-up system includes a take-up device and the aforementioned tubular device. The take-up device is detachably connected to the distal end of the tubular device and is used to wind and lock a thin, elongated wire.

[0017] In some embodiments, the take-up device includes a housing and a winding shaft rotatably disposed within the housing. The housing has an opening at its proximal end, and the winding shaft has a threaded hole at its proximal end extending through the opening. An elongated rod includes a rod body and a threaded shaft at its distal end. The elongated line moves through the housing and the winding shaft. The distal end of the outer tube engages with the housing to restrict rotation of the housing. The distal end of the inner tube is sleeved around the proximal end of the winding shaft. The threaded shaft is screwed into the threaded hole to maintain the connection between the inner tube and the winding shaft. The inner tube drives the winding shaft to rotate relative to the housing to wind the elongated line. When the winding shaft stops rotating, the elongated line is locked within the radial space between the winding shaft and the housing.

[0018] In some embodiments, the take-up device further includes an anti-rotation component disposed within the housing, which is used to cause the winding shaft to rotate in one direction. The housing includes a bottom shell and an outer shell fixedly connected. The anti-rotation component includes a limiting post, an anti-rotation wheel, and an elastic element. The limiting post is fixedly connected to the bottom shell. The anti-rotation wheel is axially movable and sleeved on the limiting post and engaged with the outer shell to restrict the rotation of the anti-rotation wheel relative to the housing. The two ends of the elastic element abut against the bottom shell and the anti-rotation wheel, respectively. The proximal end of the anti-rotation wheel is provided with a plurality of first helical teeth, and the distal end of the winding shaft is provided with a plurality of second helical teeth. The second helical teeth are in unidirectional rotational engagement with the first helical teeth.

[0019] In some embodiments, the housing is provided with a slot, and the outer tube includes an outer tube body and a claw located at the distal end of the outer tube body, the claw being used to engage with the slot.

[0020] In some embodiments, the chuck includes a connecting sleeve, which is fixedly fitted into the first inner cavity, and the outer surface of the inner tube wall is provided with an annular flange. When the chuck engages with the chuck groove and the distal end of the inner tube is sleeved onto the proximal end of the winding shaft, the two ends of the connecting sleeve abut against the annular flange and the housing, respectively.

[0021] In some embodiments, the threaded shaft is provided with an annular boss, and the inner tube is provided with an annular step in the exhaust chamber. When the far end of the inner tube is sleeved on the near end of the winding shaft and the threaded shaft is screwed into the threaded hole, the two ends of the annular step abut against the annular boss and the near end wall of the winding shaft, respectively.

[0022] In the tubular device of this embodiment, the vent connector is connected to the first inner cavity, and the first inner cavity is connected to the vent chamber through the vent hole. The vent chamber is not connected to the non-vent chamber. Therefore, when the tubular device enters the human body, the lumens that blood can enter include the first inner cavity of the outer tube and the vent chamber of the inner tube. When the tubular device performs a venting operation, liquid enters the first inner cavity of the outer tube from the vent pipe through the vent connector. Since the proximal end of the first inner cavity of the outer tube is sealed by the second seal, the liquid can only flow to the distal end of the first inner cavity to expel the gas in the first inner cavity. At the same time, when the liquid flows through the vent hole, it enters the vent chamber of the inner tube to expel the gas in the vent chamber.

[0023] In other words, the tubing device of this application only requires one venting operation to expel the gas in the first inner lumen of the outer tube and the venting chamber of the inner tube from the distal end of the tubing device, ensuring that the lumens into which blood can enter (the first inner lumen and the venting chamber) are free of gas. The tubing device of this application reduces the original two or more venting operations to one, making the operation simpler and the venting speed faster, which greatly shortens the operation time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a partial cross-sectional schematic diagram of the pipe fitting device provided in the embodiments of this application;

[0026] Figure 2 This is another partial cross-sectional schematic diagram of the pipe fitting device provided in the embodiments of this application;

[0027] Figure 3 This is another cross-sectional schematic diagram of the pipe fitting device provided in the embodiments of this application;

[0028] Figure 4 This is a partial cross-sectional schematic diagram of the pipe fitting device provided in the embodiments of this application;

[0029] Figure 5 This is another cross-sectional schematic diagram of the pipe fitting device provided in the embodiments of this application;

[0030] Figure 6 yes Figure 3 A schematic diagram showing the connection between the exhaust connector and the exhaust pipe of the pipe fitting assembly shown;

[0031] Figure 7 This is a schematic diagram of the structure of the take-up system provided in the embodiments of this application;

[0032] Figure 8 yes Figure 7 The diagram shows the take-up device of the take-up system applied to the valve ring forming structure.

[0033] Figure 9 yes Figure 8 The diagram shows the effect of the valve ring forming structure after ring shrinkage.

[0034] Figure 10 yes Figure 7 A partially exploded diagram of the tubing assembly of the cable take-up system shown.

[0035] Figure 11 yes Figure 10 A partial cross-sectional schematic diagram of the slender rod of the tubular fitting device shown;

[0036] Figure 12 yes Figure 10 A partial cross-sectional schematic diagram of the inner tube of the pipe fitting device shown;

[0037] Figure 13 yes Figure 10 A partial cross-sectional schematic diagram of the outer tube of the pipe fitting assembly shown;

[0038] Figure 14 yes Figure 7 A schematic diagram of the take-up device of the take-up system shown;

[0039] Figure 15 This is a partial cross-sectional schematic diagram of the take-up system;

[0040] Figure 16 yes Figure 14 The diagram shown illustrates the principle of the take-up device.

[0041] Figure 17 yes Figure 14 The diagram shows a partial structural schematic of the take-up device. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] To more clearly describe the structure of the tubing device and take-up system, the limiting terms "proximal" and "distal" used in this application are conventional terms in the field of interventional medicine. Specifically, "distal" refers to the end furthest from the operator during the surgical procedure, and "proximal" refers to the end closest to the operator during the surgical procedure. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The conventional terms used in this application's specification are for the purpose of describing specific embodiments only and should not be construed as limiting the application.

[0044] It is worth noting that the term "end" in terms such as "proximal end," "distal end," "one end," "the other end," "first end," "second end," "initial end," "end," "both ends," "free end," "upper end," and "lower end" is not limited to end head, end point, or end wall, but also includes the part that extends axially and / or radially from the end head, end point, or end wall on the element to which the end head, end point, or end wall belongs.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0046] This disclosure provides many different implementations or examples for carrying out different structures of this application. It is understood that the specific embodiments described herein are merely for explaining the relevant application and not for limiting the application. Furthermore, it should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Please see Figures 1 to 5 This application provides a tubing device 100. The tubing device 100 includes an outer tube 10, an inner tube 20, a first sealing element 30, a second sealing element 40, and an exhaust connector 50. The outer tube 10 has a first inner cavity 11, and the inner tube 20 is movably inserted into the first inner cavity 11 of the outer tube 10. The inner tube 20 has a second inner cavity 21. It is understood that both the first inner cavity 11 and the second inner cavity 21 have a proximal opening and a distal opening. Therefore, the inner tube 20 can be movably inserted into the first inner cavity 11, and the second inner cavity 21 can also accommodate elongated components such as guide wires.

[0048] A first sealing element 30 is disposed in the second inner cavity 21 of the inner tube 20 and is sealed to the inner surface of the inner wall of the inner tube 20, thereby dividing the second inner cavity 21 into an exhaust chamber 22 and a non-exhaust chamber 23. The exhaust chamber 22 is located on the distal side of the first sealing element 30, and the non-exhaust chamber 23 is located on the proximal side of the first sealing element 30. The inner tube 20 has an exhaust hole 24 on its wall, which connects the first inner cavity 11 and the exhaust chamber 22. A second sealing element 40 is located on the proximal side of the first sealing element 30 and is used to seal the proximal side of the first inner cavity 11 of the outer tube 10. An exhaust connector 50 is located on the distal side of the second sealing element 40, and the exhaust connector 50 connects to the first inner cavity 11 and is used to connect to an exhaust pipe 51.

[0049] It is understood that the tubing device 100 of this application is used in interventional procedures, such as in minimally invasive interventional heart valve repair surgery. Before the tubing device 100 is inserted into the human body, the lumen needs to be filled with liquids such as saline or heparin to purge the gas (usually air) in the lumen that blood can enter, so as to prevent gas from entering the venous system with the human blood circulation and causing gas embolism.

[0050] In the tubing device 100 of this embodiment, the vent connector 50 is connected to the first inner cavity 11, and the first inner cavity 11 is connected to the vent chamber 22 through the vent hole 24. The vent chamber 22 is not connected to the non-vent chamber 23. Therefore, when the tubing device 100 enters the human body, the lumens that blood can enter include the first inner cavity 11 of the outer tube 10 and the vent chamber 22 of the inner tube 20. When the tubing device 100 performs a venting operation, liquid enters the first inner cavity 11 of the outer tube 10 from the vent pipe 51 through the vent connector 50. Since the proximal end of the first inner cavity 11 of the outer tube 10 is sealed by the second sealing member 40, the liquid can only flow to the distal end of the first inner cavity 11 to expel the gas in the first inner cavity 11. At the same time, when the liquid flows through the vent hole 24, it enters the vent chamber 22 of the inner tube 20 to expel the gas in the vent chamber 22.

[0051] In other words, the tubing device 100 of this application only requires one venting operation to expel the gas in the first inner cavity 11 of the outer tube 10 and the venting chamber 22 of the inner tube 20 from the distal end of the tubing device 100, ensuring that the lumens into which blood can enter (the first inner cavity 11 and the venting chamber 22) are free of gas. The tubing device 100 of this application reduces the original two or more venting operations to one, making the operation simpler and the venting speed faster, thus greatly shortening the operation time.

[0052] In the illustrated example, the vent 24 penetrates the wall of the inner tube 20 radially, allowing for smoother flow of liquid between the first inner cavity 11 and the vent 22. Alternatively, the vent 24 can be arranged radially at an angle, penetrating the wall of the inner tube 20 to connect the first inner cavity 11 and the vent 22.

[0053] In some embodiments, the first sealing element 30 can specifically be a flexible sealing gasket made of rubber, which combines flexibility and elasticity, resulting in a good sealing effect. Of course, the flexible sealing gasket can also be made of flexible materials such as silicone or graphite. Therefore, the first sealing element 30 can be fixedly connected to the inner surface of the inner tube 20 by adhesive bonding, thus achieving a sealed connection between the first sealing element 30 and the inner surface of the inner tube 10. Alternatively, due to the use of a flexible sealing gasket, the first sealing element 30 can also be connected to the inner surface of the inner tube 10 without gaps through interference fit or compression to achieve a sealing effect.

[0054] In other embodiments, the first sealing element 30 may also be a sealing balloon filled with gas or liquid, allowing the sealing balloon to fill the second inner cavity 21 radially along the inner tube 20, thereby eliminating gaps between the sealing balloon and the inner surface of the inner tube 20 to achieve a sealing effect. This application does not limit the specific form or material of the first sealing element 30.

[0055] In some embodiments, like the first seal 30, the second seal 40 can also be a flexible sealing gasket or a sealing bulb, as described above, and will not be repeated here. This application does not limit the specific form and material of the second seal 40. Figure 1 In the example, the second seal 40 is a flexible sealing gasket. The second seal 40 is located at the proximal opening of the first inner cavity 11 and is sealed to the inner surface of the outer tube 10 by adhesive bonding. Of course, the second seal 40 can also be located in the first inner cavity 11 at a certain distance from its proximal opening, ensuring that the exhaust connector 50 is located on the distal side of the second seal 40.

[0056] In the illustrated example, the second seal 40 has an inner tube through-hole 41, allowing the inner tube 20 to extend through the second seal 40 to the outside of the outer tube 10. The inner tube through-hole 41 is small enough to allow the inner tube 20 to pass through, ensuring a tight seal between the hole wall and the outer surface of the inner tube 20. In other words, the inner tube 20 fills and seals the inner tube through-hole 41 after passing through it. It should be noted that when the inner tube 20 does not pass through the second seal 40, the inner tube through-hole 41 is essentially closed in its natural state.

[0057] In some embodiments, the vent connector 50 is provided with an vent passage 52 and a connecting groove 53 surrounding the vent passage 52. The pipe fitting assembly 100 may also include an vent pipe 51, one end of which is fitted into the connecting groove 53. The cavity of the vent pipe 51 communicates with the vent passage 52, and the vent passage 52 communicates with the first inner cavity 11. It is understood that the fitting of one end of the vent pipe 51 into the connecting groove 53 of the vent connector ensures that the cavity of the vent pipe 51 is connected to the vent passage 52 while minimizing leakage. Thus, liquid (such as saline solution) can flow from the vent pipe 51 through the vent connector 50 into the first inner cavity 11 and the vent cavity 22 of the outer tube 10, and finally out from the distal end of the pipe fitting assembly 100 (e.g.,...). Figure 1 (As indicated by the arrow). Of course, in other embodiments, the liquid (such as saline) can also flow directly into the first inner cavity 11 and the venting cavity 22 of the outer tube 10 through the venting channel 52 of the venting connector 50, and eventually flow out from the distal end of the fitting assembly 100.

[0058] Further, please refer to Figure 6 An exhaust valve 54 may be provided at the end of the exhaust pipe 51. The exhaust valve 54 is used to control the opening and closing of the exhaust pipe 51. When the exhaust valve 54 is open, the exhaust pipe 51 is connected to the outside, and liquid can be injected into the cavity of the exhaust pipe 51. When the exhaust valve 54 is closed, the connection between the exhaust pipe 51 and the outside is blocked, preventing air from entering the first inner cavity 11 and the exhaust cavity 22 from the exhaust pipe 51. The exhaust valve 54 may be a three-way valve.

[0059] Please see Figure 2 In some embodiments, the pipe fitting device 100 further includes a sealing seat 60. The sealing seat 60 has a first through hole 61 and a second through hole 62 connected sequentially from the distal end to the proximal end. The diameter of the second through hole 62 is larger than the diameter of the first through hole 61. The proximal end of the outer pipe 10 passes through the first through hole 61 and is sealed to the sealing seat 60. The second sealing member 40 fills and seals the second through hole 62. It is understood that the diameter of the second through hole 62 is larger than the diameter of the first through hole 61. A first stepped surface 64 is formed at the connection between the first through hole 61 and the second through hole 62. The second sealing member 40 is disposed in the second through hole 62 and abuts against the first stepped surface 64 to better confine the second sealing member 40 in the second through hole 62 and seal it to the sealing seat 60, so that the second sealing member 40 can seal the proximal side of the first inner cavity 11. The proximal end of the outer tube 20 is inserted into the first through hole 61. The outer tube 10 and the sealing seat 40 can be fixedly connected by adhesive bonding to ensure that the connection is sealed and that there will be no water or air leakage.

[0060] Furthermore, the pipe fitting assembly 100 also includes a fixing member 63, which is connected to the proximal end of the sealing seat 60 to press the second sealing member 40 between the first stepped surface 64 and the fixing member 63. It can be understood that in this embodiment, the second sealing member 40 is typically a flexible sealing gasket. The pressing of the second sealing member 40 by the fixing member 63 ensures that the second sealing member 40 fully fills the second through hole 62 and forms a gapless connection with the sealing seat 60. This results in a better sealing effect and stronger stability of the second sealing member 40 on the proximal side of the first inner cavity 11 of the outer tube 10.

[0061] There are several ways to connect the fixing member 63 and the sealing seat 60. For example, one end of the fixing member 63 has a receiving groove with internal threads, and the connection part between the sealing seat 60 and the fixing member 63 has external threads. The fixing member 63 is connected to the sealing seat 60 by screwing, and the second sealing member 40 is pressed against the first step surface 64 to achieve a sealing effect. Of course, the fixing member 63 can also be connected to the sealing seat 60 by plugging, gluing, etc. Since the sealing seat 60 does not enter the human body, its size can be designed to be large. Correspondingly, the second sealing member 40 can also be made larger to facilitate installation. At the same time, the method of using the sealing seat 60, the fixing member, and the second sealing member 40 to seal the proximal side of the first inner cavity 11 of the outer tube 10 is also easier to assemble. It should be noted that the second sealing member 40 has an inner tube through hole 41, and correspondingly, the fixing member 63 has a through hole, so that the inner tube 20 can extend through the second sealing member 40 and the fixing member 63 to the outside of the sealing seat 60.

[0062] Please see Figures 3 to 5 In some embodiments, the first through hole 61 of the sealing seat 60 includes a connecting mounting hole 66 and a through hole 67. The diameter of the through hole 67 is smaller than the diameter of the mounting hole 66. The sealing seat 60 forms a second stepped surface 68 at the connection between the mounting hole 66 and the through hole 67. The proximal end of the outer tube 10 passes through the mounting hole 66 and abuts against the second stepped surface 68. It is understood that the second stepped surface 68 can limit the length of the outer tube 10 passing through the first through hole 61. When the outer tube 10 and the sealing seat 60 are connected by adhesive bonding, the outer tube 10 is less likely to shake or shift because the proximal end of the outer tube 10 abuts against the second stepped surface 68, thus affecting the sealing connection effect.

[0063] It should be noted that, in this embodiment, the sealing seat 60 is provided with a mounting hole 66, a through hole 67, and a second through hole 62 sequentially from the distal end to the proximal end. A first stepped surface 64 is formed at the connection between the through hole 67 and the second through hole 62, and a second stepped surface 68 is formed at the connection between the through hole 67 and the mounting hole 66. The diameter of the through hole 67 is smaller than the outer diameter of the outer tube 10 but larger than the outer diameter of the inner tube 20, so the inner tube 20 can pass through the sealing seat 60 and enter the first inner cavity 11.

[0064] When the pipe fitting assembly 100 includes a sealing seat 60, an exhaust connector 50 can be disposed on the sealing seat 60. The exhaust channel 52 of the exhaust connector 50 is connected to the first through hole 61, that is, the exhaust channel 52 is connected to the first inner cavity 11 through the first through hole 61. When the first through hole 61 includes mounting holes 66 and through holes 67 of different diameters, the exhaust channel 52 is connected to the through hole 67 of the first through hole 61, and the exhaust channel 52 is connected to the first inner cavity 11 through the through hole 67. In this way, when the exhaust connector 50 is connected to an exhaust pipe 51, liquid (such as saline) can flow from the exhaust pipe 51 through the exhaust connector 50 into the first through hole 61, the first inner cavity 11 of the outer pipe 10, and the exhaust chamber 22, and finally flow out from the distal end of the pipe fitting assembly 100.

[0065] Please see Figures 2 to 5 In some embodiments, the pipe fitting device 100 further includes an elongated rod 70. The first sealing member 30 has a rod through-hole 31. The elongated rod 70 is movably inserted into the second inner cavity 21 and fills and seals the rod through-hole 31 after passing through it. The rod through-hole 31 is small enough to allow the elongated rod 70 to pass through, so that the wall of the through-hole 31 can fit tightly against the outer surface of the elongated rod 70 to achieve a sealing effect. It should be noted that when the elongated rod 70 does not pass through the first sealing member 30, the rod through-hole 31 is essentially closed in its natural state.

[0066] In some embodiments, the elongated rod 70 may also have an inner cavity. In this case, to ensure that the tubing device 100 can still vent gas from the lumen into which blood can enter through a single venting operation, a first sealing element is also required in the inner cavity of the elongated rod 70 to separate the inner cavity of the elongated rod 70 into a venting inner cavity and a non-venting inner cavity. The elongated rod 70 also needs to have a vent hole along its radial direction, which connects the venting chamber 22 and the venting inner cavity, so that when liquid is injected into the venting connector 50, it can flow through the first inner cavity 11 through the venting chamber 22 and the venting inner cavity, and finally exit from the distal end of the tubing device 100, achieving a single venting of all three tubes.

[0067] Please see Figure 4In some embodiments, the inner tube 20 includes a first tube body 25, a second tube body 26, and a connecting tube 27. The connecting tube 27 has a connecting cavity 28 and a receiving groove 29 sequentially formed from its distal end to its proximal end. A first sealing element 30 is disposed in the receiving groove 29 and is sealed to the inner surface of the connecting tube 27 wall to block communication between the receiving groove 29 and the connecting cavity 28. The distal end of the connecting tube 27 is sealed to the first tube body 25, and the distal end of the second tube body 26 passes through the receiving groove 29, abuts against the first sealing element 30, and is sealed to the connecting tube 27. The exhaust chamber 22 includes the cavity of the first tube body 25 and the connecting cavity 28, with the cavity of the first tube body 25 communicating with the connecting cavity 28. The non-exhaust chamber 23 includes the cavity of the second tube body 26.

[0068] It is understood that the radial dimension of the connecting cavity 28 is smaller than the radial dimension of the receiving groove 29. The first sealing element 30 is pressed into the receiving groove 29 by the cooperation of the second tube 26 and the receiving groove 29 of the connecting tube 27, thus dividing the second inner cavity 21 into an exhaust chamber 22 (the cavity of the first tube 25 and the connecting cavity 28) and a non-exhaust chamber 23 (the cavity of the second tube 26). In this embodiment, the first sealing element 30 is typically a flexible sealing gasket. The first sealing element 30 is pressed by the second tube 26, allowing it to fully radially fill the receiving groove 29 of the connecting tube 27 and the inner surface of the connecting tube 27 without gaps, resulting in better sealing and stronger stability. The first tube 25 can be sealed to the distal end of the connecting tube 27 by adhesive bonding, welding, or screwing, and the second tube 26 can also be sealed to the proximal end of the connecting tube 27 by adhesive bonding, welding, or screwing. This application does not limit the connection method between the first tube 25 and the second tube 26 and the connecting tube 27.

[0069] Further, please refer to Figure 5 The inner tube 20 also includes a connecting shaft 261. The proximal end of the connecting shaft 261 is sealed to the second tube body 26, and the distal end of the connecting shaft 261 is inserted into the receiving groove 29 and sealed to the connecting tube 27. The first sealing element 30 is located between the bottom wall of the receiving groove 29 and the distal wall of the connecting shaft 261. In this way, through the cooperation of the connecting shaft 261 and the connecting tube 27, the first sealing element 30 is pressed into the receiving groove 29 of the connecting tube 27. With the addition of the connecting shaft 261, the second tube body 26 is indirectly connected to the connecting tube 27 through the connecting shaft 261, and the selection of the inner and outer diameters of the second tube body 26 is not limited by the connecting tube 27.

[0070] Specifically, the proximal end of the connecting shaft 261 is provided with a receiving groove, and the distal end of the second tube 26 is inserted into the receiving groove of the connecting shaft 261 and sealed to the inner wall of the receiving groove by welding. The distal end of the connecting shaft 261 is provided with an external thread, and the inner wall of the receiving groove 29 of the connecting tube 27 is provided with an internal thread. The connecting shaft 261 and the connecting tube 27 are sealed and connected by the internal and external threads, and the first sealing member 30 is abutted against the bottom of the receiving groove 29 to achieve a sealing effect. Of course, in other embodiments, the connecting shaft 261 can also be sealed and connected to the connecting tube 27 by welding, gluing, etc. This application does not limit the connection method of the connecting shaft 261 and the connecting tube 27. It should be noted that when the pipe fitting device 100 includes an elongated rod 70, both the first sealing member 30 and the connecting shaft 261 are provided with rod through holes 31 for the elongated rod 70 to pass through.

[0071] exist Figure 4 In the example, the vent 24 is located on the connecting pipe 27, and the vent 24 connects to the connecting pipe cavity 28. The connecting pipe cavity 28 connects to the cavity of the first pipe body 25, and the connecting pipe cavity 28 connects to the first inner cavity 11 through the vent 24. Therefore, the vent 24 connects the first inner cavity 11 and the vent cavity 22 (the cavity of the first pipe body 25 and the connecting pipe cavity 28). Of course, in other embodiments, the vent 24 may also be located on the first pipe body 25 and connect the inner cavity of the first pipe body 25 with the first inner cavity 11. This application does not limit the specific location of the vent 24; the vent 24 can be located on the distal side of the first sealing member 30.

[0072] Please see Figure 5 and Figure 7 This application also provides a take-up system 200. The take-up system 200 includes a take-up device 300 and the aforementioned tubular device 100. The take-up device 300 is detachably connected to the distal end of the tubular device 100 and is used to wind and lock the slender line 500. The tubular device 100 includes an outer tube 10, an inner tube 20, and a slender rod 70. All components of the take-up device 300 are made of biocompatible materials, preferably SUS316L stainless steel.

[0073] Understandably, after the take-up device 300 and the tubing device 100 are connected, before the entire take-up system 200 enters the human body, it is necessary to purge the gas from a portion of the tubing device 100's lumen. This portion of the lumen refers to the lumen from which blood can enter from the distal end of the take-up system 200, including the first inner lumen 11 of the outer tube 10 and the venting chamber 22 of the inner tube 20. Due to the action of the first seal 30, blood cannot enter the non-venting chamber 23, so no venting operation is required. Therefore, by injecting liquid (such as saline) into the tubing device 100 through the venting valve 54, the liquid passes through the first inner lumen 11 of the outer tube 10 and enters the venting chamber 22 through the venting hole 24, finally flowing out from the distal end of the tubing device 100. Only one venting operation is needed to purge the gas from this portion of the lumen, making the operation simple and the venting speed faster. At this point, there is no gas in the lumen from which blood can enter, preventing air embolism caused by the take-up system 200 entering the human body and entering the venous system through blood circulation.

[0074] Please see Figure 8 and Figure 9 In some embodiments, the take-up device 300 can be applied to the annulus remodeling structure 400, which is used to reduce the size of the valve annulus to treat mitral regurgitation or tricuspid regurgitation (blood flowing back from the ventricle to the atrium, referred to as blood regurgitation). The annulus remodeling structure 400 includes an elongated wire 500, a plurality of anchors 410 movable on the elongated wire 500, and spacers 420. After the plurality of anchors 410 are sequentially implanted into the valve annulus, the plurality of anchors 410 and the plurality of spacers 420 are alternately threaded on the elongated wire 500. At this time, the take-up device 300 can be delivered to the vicinity of the last anchor 410 or spacer 420 on the elongated wire 500. By winding and locking the elongated wire 500 by the take-up device 300, the distance between adjacent anchors 410 is reduced, thereby reducing or eliminating blood regurgitation. It should be noted that the suture retraction device 300 will be placed in the heart as part of the annulus reconstruction structure 400, along with the slender suture 500, anchor 410, and spacer 420. Of course, the suture retraction device 300 can also be applied to other implants that require tightening and locking of the slender suture 500. The following explanation uses the application of the suture retraction device 300 in the annulus reconstruction structure 400 as an example.

[0075] Please see Figures 10 to 17 In some embodiments, the take-up device 300 includes a housing 310 and a winding shaft 320 rotatably disposed within the housing 310. The housing 310 has an opening 311 at its proximal end, and the winding shaft 320 has a threaded hole 321 at its proximal end, extending through the opening 311 of the housing 310. The elongated rod 70 includes a rod body 71 and a threaded shaft 72, the threaded shaft 72 being located at the distal end of the rod body 71.

[0076] A slender wire 500 moves through the housing 310 and the winding shaft 320. The distal end of the outer tube 10 is engaged with the housing 310 to restrict the rotation of the housing 310. The distal end of the inner tube 20 is sleeved on the proximal end of the winding shaft 320. The threaded shaft 72 of the slender rod 70 is screwed into the threaded hole 321 of the winding shaft 320 to maintain the connection between the inner tube 20 and the winding shaft 320. The inner tube 20 is used to drive the winding shaft 320 to rotate relative to the housing 310 to wind the slender wire 500. When the winding shaft 320 stops rotating, the slender wire 500 is locked in the radial space between the winding shaft 320 and the housing 310.

[0077] In this way, by rotating the inner tube 20 to drive the winding shaft 320 to rotate, the slender line 500 is wound onto the winding shaft 320, thus achieving the purpose of winding the line. When the winding shaft 320 stops rotating, the slender line 500 is locked and maintained at a certain length, making the operation simple.

[0078] Please see Figure 11 In some embodiments, the radial dimension of the threaded shaft 72 is larger than the radial dimension of the rod 71. The proximal end of the threaded shaft 72 is provided with a mounting groove 73, and the distal end of the rod 71 is fixedly connected to the mounting groove 73 of the threaded shaft 72. The distal end of the threaded shaft 72 is provided with an external thread for screwing into the threaded hole 321 of the winding shaft 320.

[0079] Specifically, the rod 71 may include a helical rod 75 and a cylindrical rod 76. The distal end of the cylindrical rod 76 is connected to the proximal end of the helical rod 75, and the distal end of the helical rod 75 is fixedly connected to the mounting groove 73 of the threaded shaft 72. It is understood that the distal portion of the rod 71 is configured as a helical rod 75, which enhances the flexibility of the distal portion of the rod 71. This allows the slender rod 70 to bend to conform to the curvature of the blood vessel when the tubular device 100 enters the blood vessel, thereby avoiding damage to the blood vessel.

[0080] Please see Figure 15 In some embodiments, the threaded shaft 72 is provided with an annular boss 74, and the inner tube 20 is provided with an annular step 255 in the exhaust chamber 22. When the distal end of the inner tube 20 is sleeved on the proximal end of the winding shaft 320 and the threaded shaft 72 is screwed into the threaded hole 321, the two ends of the annular step 255 of the inner tube 20 abut against the annular boss 74 of the threaded shaft 72 and the proximal end wall of the winding shaft 320, respectively. In this way, the annular boss 74 presses against the annular step 255, keeping the inner tube 20 connected to the winding shaft 320. By rotating the inner tube 20, the winding shaft 320 can be driven to rotate relative to the housing 310, and the slender wire 500 can be wound onto the winding shaft 320. When the inner tube 20 stops rotating, the slender wire 500 can be locked, thereby achieving the purpose of winding.

[0081] Specifically, please refer to Figure 12The first tube body 25 of the inner tube 20 includes a rotating shaft 251, a rotating shaft connecting tube 252, and a driving tube 253. The proximal end of the rotating shaft 251 is sealed to the distal end of the rotating shaft connecting tube 252, the proximal end of the rotating shaft connecting tube 252 is sealed to the distal end of the driving tube 253, and the proximal end of the driving tube 253 is sealed to the distal end of the connecting tube 27. The inner cavities of the rotating shaft 251, the rotating shaft connecting tube 252, and the driving tube 253 together form the cavity of the first tube body 25. The hardness of the rotating shaft 251 and the rotating shaft connecting tube 252 is greater than that of the driving tube 253. The rotating shaft 251 can be sealed to the rotating shaft connecting tube 252 by welding, and the driving tube 253 can be sealed to the proximal end of the rotating shaft connecting tube 252 and the distal end of the connecting tube 27 by adhesive bonding. This application does not limit the connection method between the components of the first tube body 25.

[0082] Understandably, the first tube 25 is designed as a three-section structure consisting of a rotating shaft 251, a rotating shaft connecting tube 252, and a driving tube 253. This design facilitates the assembly of the threaded shaft 72, confining it within the cavity formed by the rotating shaft 251 and the rotating shaft connecting tube 252. Furthermore, the driving tube 253 can be a braided tube, balancing flexibility and torsion control. The braided tube itself possesses a certain degree of torsion control, resulting in a relatively tight wall structure for the driving tube 253. The braided tube also exhibits good flexibility, allowing the inner tube 20 to bend to conform to the curvature of the blood vessel when the tubing device 100 enters the blood vessel, thereby preventing damage.

[0083] Please see Figures 13 to 15 In some embodiments, the housing 310 of the take-up device 300 is provided with a slot 312. The outer tube 10 includes an outer tube body 13 and a claw 12 located at the distal end of the outer tube body 13. The claw 12 is used to engage with the slot 312. There can be one or more claws 12. Preferably, there are two claws 12, which are fixedly connected to the distal end of the outer tube body 13 and arranged opposite to each other. Correspondingly, the housing 310 is provided with two slots. Thus, the outer tube 10 and the housing 310 are connected through the engagement of the claws 12 with the slots. By controlling the outer tube 10 to remain stationary, the rotation of the housing 310 can be restricted. It should be noted that the inner cavity of the outer tube body 13 is the first inner cavity 11.

[0084] Furthermore, the chuck 12 includes a connecting sleeve 14, which is fixedly installed in the first inner cavity 11. This means that the chuck 12 can be more securely installed on the outer tube 13 via the connecting sleeve 14. The outer surface of the inner tube 20 wall is provided with an annular flange 254. When the chuck 12 engages with the slot 312, and the distal end of the inner tube 20 is sleeved onto the proximal end of the winding shaft 320, the two ends of the connecting sleeve 14 of the chuck 12 abut against the housing 310 and the annular flange 254 of the inner tube 20, respectively. Thus, the pressure of the annular flange 254 on the connecting sleeve 14 keeps the outer tube 10 connected to the housing 310. The engagement between the chuck 12 and the slot 312 is easily disengaged. After the threaded shaft 72 separates from the threaded hole 321, the connection between the inner tube 20 and the winding shaft 320 can be released, and then the outer tube 10 can be separated from the housing 310, allowing the take-up device 300 to separate from the tube fitting device 100.

[0085] Please see Figures 14 to 17 In some embodiments, the housing 310 has symmetrical threading holes 313 on opposite sides, and the winding shaft 320 has a winding hole 324. Both threading holes 313 are connected to the winding hole 324 of the winding shaft 320. When the take-up device 300 is threaded onto the slender wire 500, the slender wire 500 first enters the housing through one threading hole 313, then passes through the winding hole 324 of the winding shaft 320, and then exits the housing 310 through the other threading hole 313. Preferably, the central axis of the winding hole 324 and the central axis of the threading hole 313 are located in the same plane. The winding shaft 320 can be rotated so that the central axis of the winding hole 324 is collinear with the central axes of the two threading holes 313. This facilitates the smooth passage of the slender wire 500 through the two threading holes 313 and the winding hole 324.

[0086] In some embodiments, the take-up device 300 further includes an anti-rotation component 330. The anti-rotation component 330 is disposed within the housing 310 and is used to allow the winding shaft 320 to rotate unidirectionally. The housing 310 includes a bottom shell 314 and an outer shell 315 fixedly connected. The anti-rotation component 330 includes a limiting post 331, an anti-rotation wheel 332, and an elastic element 333. The limiting post 331 is fixedly connected to the bottom shell 314. The anti-rotation wheel 332 is axially movable and sleeved on the limiting post 331, engaging with the outer shell 315 to restrict the rotation of the anti-rotation wheel 332 relative to the outer shell 315. The two ends of the elastic element 333 abut against the bottom shell 314 and the anti-rotation wheel 332, respectively. The proximal end of the anti-rotation wheel 332 is provided with a plurality of first helical teeth 334, and the distal end of the winding shaft 320 is provided with a plurality of second helical teeth 322. The first helical teeth 334 and the second helical teeth 322 are in unidirectional rotational engagement.

[0087] It is understood that one end of the elastic element 333 abuts against the bottom shell 314, and the other end abuts against the anti-rotation wheel 332, providing elastic force to the anti-rotation wheel 332 so that the first helical tooth 334 of the anti-rotation wheel 332 can engage with the second helical tooth 322 of the winding shaft 320. When the winding shaft 320 rotates forward relative to the outer shell 315, the second helical tooth 322 slips on the first helical tooth 334, causing the anti-rotation wheel 332 to move to the distal end. After the winding shaft 320 rotates relative to the anti-rotation wheel 332 by an angle equal to the first helical tooth 334, the anti-rotation wheel 332 moves towards the proximal end after being subjected to the elastic force provided by the elastic element 333, so that the first helical tooth 334 and the second helical tooth 322 re-engage. When the winding shaft 320 is to be rotated in the reverse direction, the second helical tooth 322 cannot cause the anti-rotation wheel 332 to move to the distal end, and the second helical tooth 322 cannot pass over any of the first helical teeth 334, resulting in the winding shaft 320 being unable to reverse. Therefore, when the winding shaft 320 stops rotating, the slender wire 500 is locked within the radial space between the winding shaft 320 and the housing 310. Figure 17 In the example, the winding shaft 320 rotates clockwise when it rotates in the forward direction and counterclockwise when it rotates in the reverse direction. Of course, in other embodiments, the winding shaft 320 can rotate counterclockwise when it rotates in the forward direction and clockwise when it rotates in the reverse direction.

[0088] The distal wall of the winding shaft 320 is provided with a groove 323 that mates with the proximal end of the limiting post 331. The proximal end of the limiting post 331 is located in the groove 323. The limiting post 331 and the outer shell 315 together restrict the axial displacement of the winding shaft 320 within the outer shell 310, so that the winding shaft 320 can only rotate. The distal end of the outer shell 315 is also provided with a limiting groove 316, and the proximal end of the anti-rotation wheel 332 is also provided with a limiting boss 335. The limiting groove 316 and the limiting boss 335 mate to restrict the anti-rotation wheel 332 from rotating relative to the outer shell 315, so that the anti-rotation wheel 332 can only move axially along the limiting post 331.

[0089] When the take-up device 300 is applied to the petal ring forming structure 400, after multiple anchors 410 are sequentially implanted into the petal ring, multiple anchors 410 and multiple spacers 420 are alternately threaded onto the slender wire 500. At this time, the take-up device 300 needs to be sent to the vicinity of the last anchor 410 or spacer 420 on the slender wire 500 through the tubular device 100. Then, the inner tube 20 is driven to rotate, which drives the winding shaft 320 to rotate, while the outer tube 10 remains stationary so that the housing 310 remains stationary. The slender rod 70 rotates with the rotating shaft. The winding shaft 320 rotates relative to the housing 310, causing the slender wire 500 to be wound around the winding shaft 320. The slender wire 500 continuously tightens, reducing the distance between adjacent anchors 410, thereby shrinking the valve annulus. The rotation of the winding shaft 320 is stopped when the blood backflow weakens or disappears. At this time, the slender wire 500 is locked in the radial space between the winding shaft 320 and the housing 310, and the slender wire 500 maintains a certain length on the valve annulus.

[0090] It is understandable that when the winding shaft 320 stops rotating, due to the anti-rotation effect of the anti-rotation wheel 332, the winding shaft 320 cannot rotate in the opposite direction. This causes the slender wire 500 to be locked in the radial space between the winding shaft 320 and the housing 310 by frictional force. This allows the slender wire 500 to maintain a certain length on the valve annulus, achieving annulus contraction to reduce blood reflux. It should be noted that the slender wire 500 is wound on the winding shaft 320 at least three times, so that the frictional force between each turn of the slender wire 500 can counteract the tension generated by the valve leaflet movement, ensuring that the slender wire 500 is not pulled, thus allowing the slender wire 500 to maintain a certain length after annulus contraction.

[0091] It should be understood that in the take-up system 200, the tubular device 100 is used to drive the take-up device 300 to wind and lock the slender line 500. After the take-up device 300 locks the slender line 500, the tubular device 100 can be separated from the take-up device 300. In practical applications, even if the tubular device 100 does not provide a first sealing element 30 in the inner cavity of the inner tube 20, that is, if the tubular device 100 provides sealed venting structures at the proximal ends of the outer tube 10 and the inner tube 20 respectively to discharge the gas in the inner cavities of the outer tube 10 and the inner tube 20, the function of the tubular device 100 in driving the take-up device 300 to wind the slender line 500 will not be affected.

[0092] It should be noted that the slender wire 500 has a certain axial length and is flexible. The radial cross-sectional shape of the slender wire 500 can be circular, oval, rectangular, square or other shapes.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0094] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A pipe fitting device, characterized in that, It includes an outer tube, an inner tube, a first sealing element, a second sealing element, and an exhaust connector. The outer tube has a first inner cavity, the inner tube is movably inserted into the first inner cavity, and the inner tube has a second inner cavity. The first sealing element is disposed in the second inner cavity and is sealed to the inner surface of the inner tube wall to divide the second inner cavity into an exhaust cavity and a non-exhaust cavity. The exhaust cavity is located on the distal side of the first sealing element. The inner tube wall is provided with an exhaust hole, which connects the first inner cavity and the exhaust cavity. The second seal is located on the proximal side of the first seal and is used to seal the proximal side of the first inner cavity. The exhaust connector is located on the distal side of the second seal and communicates with the first inner cavity. The exhaust connector is used to communicate with an exhaust pipe. Wherein, the first sealing element is a flexible sealing gasket or a sealing balloon; the second sealing element is a flexible sealing gasket or a sealing balloon.

2. The pipe fitting device as described in claim 1, characterized in that, The inner tube includes a first tube body, a second tube body, and a connecting tube. The connecting tube has a connecting cavity and a receiving groove sequentially opened from the distal end to the proximal end. The first sealing element is disposed in the receiving groove and is sealed to the inner surface of the connecting tube wall to block the communication between the receiving groove and the connecting cavity. The distal end of the connecting tube is sealed to the first tube body. The distal end of the second tube body is inserted into the receiving groove and is sealed to the connecting tube. The exhaust chamber includes the cavity of the first tube body and the connecting cavity. The cavity of the first tube body is connected to the connecting cavity. The non-exhaust chamber includes the cavity of the second tube body.

3. The pipe fitting device as described in claim 2, characterized in that, The vent is located in the connecting pipe and communicates with the cavity of the connecting pipe; or The vent is located in the first pipe body and is connected to the cavity of the first pipe body.

4. The pipe fitting device as described in claim 2, characterized in that, The inner tube also includes a connecting shaft, the proximal end of which is sealed to the second tube body, and the distal end of which is inserted into the receiving groove and sealed to the connecting tube. The first sealing element is located between the bottom wall of the receiving groove and the distal wall of the connecting shaft.

5. The pipe fitting device as described in claim 1, characterized in that, The exhaust connector is provided with an exhaust channel and a connecting groove surrounding the exhaust channel. The pipe wall at one end of the exhaust pipe passes through the connecting groove. The cavity of the exhaust pipe is connected to the exhaust channel, and the exhaust channel is connected to the first inner cavity.

6. The pipe fitting device as described in claim 1, characterized in that, The pipe fitting device further includes a sealing seat, which has a first through hole and a second through hole sequentially formed from the distal end to the proximal end. The diameter of the second through hole is larger than that of the first through hole. The proximal end of the outer pipe is inserted into the first through hole and is sealed to the sealing seat. The second sealing element fills and seals the second through hole.

7. The pipe fitting device as described in claim 6, characterized in that, The sealing seat forms a first stepped surface at the connection between the first through hole and the second through hole. The pipe fitting device also includes a fixing member, which is connected to the proximal end of the sealing seat to press the second sealing member between the first stepped surface and the fixing member.

8. The pipe fitting device as described in claim 6, characterized in that, The first through hole includes a connected mounting hole and a through hole. The diameter of the through hole is smaller than the diameter of the mounting hole. The sealing seat forms a second stepped surface at the connection between the mounting hole and the through hole. The proximal end of the outer tube passes through the mounting hole and abuts against the second stepped surface.

9. The pipe fitting device according to any one of claims 1-8, characterized in that, The second sealing element has an inner tube through hole, and the inner tube passes through the inner tube through hole and fills and seals the inner tube through hole.

10. The pipe fitting device as described in claim 9, characterized in that, The tubular device further includes a slender rod. The first sealing member has a rod through hole. The slender rod is movably inserted into the second inner cavity and fills and seals the rod through hole after passing through it.

11. A cable take-up system, characterized in that, Includes a take-up device and the tubular device of claim 10, wherein the take-up device is detachably connected to the distal end of the tubular device and is used for winding and locking a thin, elongated wire.

12. The take-up system as described in claim 11, characterized in that, The take-up device includes a housing and a winding shaft rotatably disposed within the housing. The housing has an opening at its proximal end, and the winding shaft has a threaded hole at its proximal end that extends through the opening. The slender rod includes a rod body and a threaded shaft disposed at the distal end of the rod body. The slender wire moves through the housing and the winding shaft. The distal end of the outer tube is engaged with the housing to restrict the rotation of the housing. The distal end of the inner tube is sleeved on the proximal end of the winding shaft. The threaded shaft is screwed into the threaded hole to maintain the connection between the inner tube and the winding shaft. The inner tube is used to drive the winding shaft to rotate relative to the housing to wind the slender wire. When the winding shaft stops rotating, the slender wire is locked in the radial space between the winding shaft and the housing.

13. The take-up system as described in claim 12, characterized in that, The take-up device further includes an anti-rotation component disposed within the housing, the anti-rotation component being used to cause the winding shaft to rotate in one direction; The housing includes a fixedly connected bottom shell and an outer shell. The anti-rotation assembly includes a limiting post, an anti-rotation wheel, and an elastic element. The limiting post is fixedly connected to the bottom shell. The anti-rotation wheel is axially movably sleeved on the limiting post and engaged with the outer shell to restrict the rotation of the anti-rotation wheel relative to the housing. The two ends of the elastic element abut against the bottom shell and the anti-rotation wheel, respectively. The proximal end of the anti-rotation wheel is provided with a plurality of first helical teeth, and the distal end of the winding shaft is provided with a plurality of second helical teeth. The second helical teeth are unidirectionally rotatably engaged with the first helical teeth.

14. The take-up system as described in claim 12 or 13, characterized in that, The housing is provided with a slot, and the outer tube includes an outer tube body and a claw located at the distal end of the outer tube body. The claw is used to engage with the slot.

15. The take-up system as described in claim 14, characterized in that, The claw includes a connecting sleeve, which is fixedly installed in the first inner cavity. The outer surface of the inner tube wall is provided with an annular flange. When the claw engages with the slot and the distal end of the inner tube is sleeved on the proximal end of the winding shaft, the two ends of the connecting sleeve abut against the annular flange and the housing, respectively.

16. The take-up system as described in claim 12 or 15, characterized in that, The threaded shaft is provided with an annular boss, and the inner tube is provided with an annular step in the exhaust chamber. When the far end of the inner tube is sleeved on the near end of the winding shaft and the threaded shaft is screwed into the threaded hole, the two ends of the annular step abut against the annular boss and the near end wall of the winding shaft, respectively.

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