Flexible multi-mode ablation catheter vacuum tube compensation structure assembly and pipeline switching structure

Abstract

The embodiment of the utility model provides a flexible multi-mode ablation catheter vacuum tube compensation structure assembly which comprises a vacuum forming layer clamped between a flexible vacuum outer tube and a vacuum inner tube; the switching structure is provided with a vacuum chamber, the far end of the vacuum chamber is communicated with the vacuum forming layer, and the near end of the vacuum chamber is communicated with the connecting pipeline; the vacuum tube compensation structure assembly is provided with an adjusting piece, and the adjusting piece is arranged between the vacuum outer tube and the vacuum cavity in an axial sliding mode. According to the vacuum tube compensation structure assembly, the displacement difference caused by different bending radiuses of the flexible vacuum outer tube and the vacuum inner tube when the flexible vacuum outer tube is bent can be compensated.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical device technology, and in particular to a flexible multi-modal ablation catheter vacuum tube compensation structure component and a pipeline switching structure. Background Art

[0002] The incidence of malignant tumors is increasing year by year, posing a growing threat to human health. Traditional treatment methods such as surgery, radiotherapy, chemotherapy and other technologies are becoming more and more mature, but they will inevitably cause varying degrees of damage to the normal functions of the body, and the success rate of treatment still needs to be improved. With the development of science and technology, especially the advancement of medical imaging technologies such as magnetic resonance imaging and ultrasound imaging, minimally invasive surgeries such as cryotherapy and heating ablation therapy for tumors have made great progress and are becoming more and more popular, but they still have their own shortcomings.

[0003] Multimodal thermal physical therapy for tumors can not only overcome the shortcomings of single cold and single heat therapy, but also improve the cure rate of tumors, while protecting normal tissues from damage. It has become a hot topic in the research of thermal physical therapy for tumors. Through the precise control and regulation of the local thermal physical effects of malignant tumors, multimodal thermal physical therapy can not only effectively treat in situ tumors, but also relieve the immunosuppression of malignant tumors on the body, and induce and enhance the body's anti-tumor immune response, thereby effectively inhibiting distant metastasis.

[0004] Chinese invention patent CN202210774481.6 discloses a multimodal ablation probe and control system, which is inserted into the target lesion through percutaneous puncture, and then sequentially applies freezing and radiofrequency energy to the tumor tissue to achieve multimodal ablation treatment. However, for tumors in some special locations, such as those near natural cavities such as the respiratory tract, esophagus, and urethra, it is difficult for the probe to enter the tumor through percutaneous puncture without causing trauma to the tissue in the cavity, and once the wall of the above-mentioned cavity is penetrated, the result is often fatal. Therefore, the development of a flexible multimodal ablation needle and control system, which can smoothly reach the target tumor through the natural cavity and implement multimodal treatment, will significantly reduce tissue initiation, improve surgical efficiency, and is of great significance in the treatment of cavity tumors.

[0005] The main difference between the flexible multimodal ablation needle system and the traditional multimodal ablation needle system (percutaneous puncture) is that the flexible multimodal ablation needle has a longer tube (about 1m) entering the human body, and the outer tube material is usually a flexible polymer material with a high deflation coefficient under vacuum conditions. Therefore, if the conventional probe is used to pre-make the vacuum tube, it will be difficult to maintain the high vacuum degree of the flexible probe needle tube for a long time. In addition, the vacuum cavity formed between the inner and outer vacuum tubes of the flexible multimodal ablation needle is very thin (about 0.15mm). When the ablation needle bends in the preset laparoscope, the inner and outer vacuum tubes will contact each other due to the different bending radii of the inner and outer vacuum tubes, resulting in vacuum failure at the contact point, affecting the operation. Therefore, this patent first adopts real-time vacuum extraction technology during surgery to realize the vacuum structure of the flexible multimodal ablation needle. In addition, this patent also sets a compensation structure for the vacuum layer. When the pipeline is bent, the compensation structure can effectively compensate for the displacement difference between the inner and outer tubes caused by the different bending radius. When the ablation needle is positioned, it is locked by the locking device to form an effective sealing structure to realize the subsequent vacuum process. Utility Model Content

[0006] In view of the above problems, the present application provides a flexible multi-modal ablation catheter vacuum tube compensation structure assembly and a pipeline switching structure to overcome the above problems or at least partially solve the above problems.

[0007] An embodiment of the present application provides a vacuum tube compensation structure assembly, which includes: a vacuum forming layer, which is sandwiched between a flexible vacuum outer tube and a vacuum inner tube; a transition structure, which has: a vacuum chamber, the distal end of the vacuum chamber is connected to the vacuum forming layer, and the proximal end of the vacuum chamber is connected to a connecting pipeline; a vacuum tube compensation structure assembly, the vacuum tube compensation structure assembly is provided with an adjusting member, and the adjusting member can be axially slidably arranged between the vacuum outer tube and the vacuum chamber.

[0008] Optionally, the vacuum chamber has a shell, the adjusting member axially passes through the shell and extends to the inside of the shell, the distal end of the adjusting member is slidably and sealingly connected to the vacuum outer tube, and the adjusting member can slide axially relative to the shell.

[0009] Optionally, the vacuum tube compensation structure assembly further comprises a fastener disposed on the housing, and the fastener can fix the adjusting member in the radial direction to limit the axial movement of the adjusting member.

[0010] Optionally, a limiting structure is provided between the adjusting member and the housing, and the limiting structure has a planar structure for limiting the axial rotation of the adjusting member.

[0011] Optionally, a stopper is provided at the proximal end of the adjusting member, and a radial length of the stopper is greater than a radial length of the proximal end of the shell.

[0012] Optionally, a sealing ring is provided on the stopper, and when the adjusting member moves axially to the distal end of the housing, the sealing ring forms a seal between the stopper and the housing.

[0013] On the other hand, the present application provides a pipeline transition structure, which includes: the above-mentioned vacuum tube compensation structure assembly; a return air chamber, the distal end of the return air chamber is connected to the first return air pipeline, and the proximal end of the return air chamber is connected to the second return air pipeline; an air intake pipeline, which runs through the vacuum chamber and the return air chamber, and the air intake pipeline includes a first part and a second part, the vacuum forming layer, the first return air pipeline and the first part of the air intake pipeline are sequentially arranged from the outside to the inside along the radial direction, the second return air pipeline and the second part of the air intake pipeline are independent of each other and the connecting pipeline is covered on the outer periphery of the second return air pipeline and the second part of the air intake pipeline.

[0014] Optionally, a base is provided at the proximal end of the pipeline transfer structure, the base is connected to the vacuum chamber and the return air chamber respectively, and the connecting pipeline and the second return air pipeline are connected to the vacuum chamber and the return air chamber respectively via the base, and the air inlet pipeline runs through the base.

[0015] Optionally, the second return air pipeline is connected to the return air chamber through a transition pipeline provided on the base, and the transition pipeline includes a first pipe portion and a second pipe portion extending axially, and a third pipe portion extending radially, and the third pipe portion is respectively connected to the first pipe portion and the second pipe portion.

[0016] Optionally, the connecting pipeline is connected to a vacuum forming device, and when the vacuum forming device is in operation, the vacuum forming layer, the vacuum chamber and the connecting pipeline form a vacuum.

[0017] It can be seen from the above technical solutions that the vacuum tube compensation structure assembly of the embodiment of the present application can compensate for the displacement difference caused by the different bending radii between the flexible vacuum outer tube and the vacuum inner tube when the flexible vacuum outer tube is bent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a cross-sectional view of an embodiment of a vacuum tube compensation structure assembly of the present application;

[0020] Figure 2 It is a partially enlarged cross-sectional view of an embodiment of a vacuum tube compensation structure assembly of the present application;

[0021] Figure 3 is a cross-sectional view of a distal end portion of an embodiment of a vacuum tube compensation structure assembly of the present application;

[0022] Figure 4 It is a front view of an embodiment of a base of a vacuum tube compensation structure assembly of the present application facing the distal end;

[0023] Figure 5-6 They are Figure 4 The cross-sectional view of the base of a vacuum tube compensation structure assembly of the present application along the GG and HH directions is shown;

[0024] Figure 7 It is a front view of an embodiment of a base of a vacuum tube compensation structure assembly of the present application toward the proximal end;

[0025] Figure 8 It is a three-dimensional perspective view of a base of a vacuum tube compensation structure assembly of the present application;

[0026] Fig. 9 It is a schematic diagram of a pipeline conversion structure of the present application.

[0027] Component number

[0028] 10: vacuum tube compensation structure assembly; 101: needle; 102: vacuum outer tube; 103: vacuum forming layer; 104: first return air pipe; 105: air inlet pipeline; 106: exhaust hole; 108: vacuum chamber; 109: connecting pipeline; 110: return air chamber; 111: base; 112: transfer pipeline; 1121: first tube part; 1122: second tube part; 1123: third tube part; 114: rear end joint; 118: pipeline conversion structure; 119: second return air pipeline; 123: adjustment member; 124: shell; 126: fastener; 127: limit structure; 128: stopper; 129: sealing ring; 130: vacuum inner tube. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0030] The “distal end” and “front end” mentioned herein refer to the left end of the vacuum tube compensation structure assembly shown in the figure; the “proximal end” and “rear end” mentioned herein refer to the right end of the vacuum tube compensation structure assembly shown in the figure.

[0031] The specific implementation of the embodiment of the present application is further explained below in conjunction with the accompanying drawings of the embodiment of the present application.

[0032] See also Figures 1 to 8 In a specific implementation of the present application, a vacuum tube compensation structure assembly 10 is provided, which includes: a vacuum forming layer, which is sandwiched between a flexible vacuum outer tube and a vacuum inner tube; a transition structure, which has: a vacuum chamber, the distal end of which is connected to the vacuum forming layer, and the proximal end of which is connected to a connecting pipeline; a vacuum tube compensation structure assembly, which is provided with an adjustment member, which can be axially slidably arranged between the vacuum outer tube and the vacuum chamber. The vacuum inner tube can be the outer wall of the first return air pipe.

[0033] In one embodiment, the vacuum tube compensation structure assembly also includes: a return air chamber, the distal end of the return air chamber is connected to the first return air pipeline, and the proximal end of the return air chamber is connected to the second return air pipeline; an air intake pipeline, which runs through the vacuum chamber and the return air chamber, and the air intake pipeline includes a first part and a second part, the vacuum forming layer, the first return air pipeline and the first part of the air intake pipeline are sequentially arranged from the outside to the inside along the radial direction, the second return air pipeline and the second part of the air intake pipeline are independent of each other and the connecting pipeline is covered on the outer periphery of the second return air pipeline and the second part of the air intake pipeline.

[0034] In one embodiment, the vacuum chamber has a shell, the adjusting member axially passes through the shell and extends to the inside of the shell, the distal end of the adjusting member is slidably and sealingly connected to the vacuum outer tube, and the adjusting member can slide axially relative to the shell.

[0035] In one embodiment, the vacuum tube compensation structure assembly further comprises a fastener disposed on the housing, the fastener can fix the adjusting member in the radial direction to limit the axial movement of the adjusting member. The fastener can be a locking nut, and the sealing connection between the adjusting member and the vacuum housing is achieved by tightening the locking nut.

[0036] In one embodiment, a limiting structure is provided between the adjusting member and the housing, the limiting structure has a planar structure, and the contact portion of the housing with the limiting structure may be a plane or an arc surface, thereby the limiting structure may limit the axial rotation of the adjusting member.

[0037] In one embodiment, a stopper is provided at the proximal end of the adjusting member, and a radial length of the stopper is greater than a radial length of the proximal end of the housing.

[0038] In one embodiment, a sealing ring is provided on the stopper, and a groove can be provided at the front end of the stopper, in which the sealing ring is clamped. When the adjusting member moves axially to the far end of the shell, the sealing ring forms a seal between the stopper and the shell.

[0039] In one embodiment, a base is provided at the proximal end of the vacuum tube compensation structure assembly, and the base is respectively connected to the vacuum chamber and the return air chamber, and the connecting pipeline and the second return air pipeline are respectively connected to the vacuum chamber and the return air chamber via the base, and the air intake pipeline runs through the base.

[0040] In one embodiment, the second return air pipeline is connected to the return air chamber through a transfer pipeline provided on the base, and the transfer pipeline includes a first pipe portion and a second pipe portion extending axially, and a third pipe portion extending radially, and the third pipe portion is respectively connected to the first pipe portion and the second pipe portion.

[0041] In one embodiment, the connecting pipeline is connected to a vacuum forming device. When the vacuum forming device is in operation, the vacuum forming layer, the vacuum chamber and the connecting pipeline form a vacuum.

[0042] When the flexible vacuum outer tube is not bent, there is an axial gap (1 to 3 mm) between the sealing ring and the vacuum outer shell. When the flexible vacuum outer tube moves in the endoscope cavity and bends, due to the displacement difference between the flexible vacuum outer tube and the vacuum inner tube, the axial gap between the sealing ring and the vacuum outer shell gradually decreases, and the sealing ring fits the inner side of the vacuum outer shell. When the flexible vacuum outer tube is placed, the sealing adjustment piece and the vacuum outer shell are sealed by tightening the locking nut.

[0043] The flexible vacuum outer tube can be made of a flexible tube with good lubricity and insulation. The material of the flexible vacuum outer tube can be PTFE, Nylon, PEBAX and other polymer materials. The outer diameter of the flexible vacuum outer tube can be between 1mm and 4mm, and the length can be between 100mm and 3000mm. The material of the air intake line 105 can be metal, such as stainless steel 304, 316L, brass, copper, etc. The material of the first return air line and the second return air line can be PTFE, Nylon, PEBAX, etc.

[0044] In one embodiment, the vacuum forming layer is sandwiched between a flexible vacuum outer tube and a vacuum inner tube, and the flexible vacuum outer tube is sealed and connected to the distal end of the vacuum inner tube. The vacuum tube compensation structure assembly also includes a needle connected to the distal end of the flexible vacuum outer tube, and the first return air pipeline is interconnected with the first part of the air intake pipeline.

[0045] In one embodiment, the first portion is connected to the needle, and at least one through hole is disposed at a distal end of the first portion.

[0046] In one embodiment, a temperature measuring device is provided in the first air return line, and the temperature measuring device is in contact with the needle; the needle is connected to a radio frequency circuit, and the radio frequency circuit is also electrically connected to the host to transmit energy generated by the host to the needle. The temperature measuring device can be a thermocouple or other temperature measuring devices.

[0047] The connecting pipeline can be connected to a rear end joint, and the rear end joint has three independent conversion pipelines, which are respectively connected to the air intake pipeline, the second air return pipeline and the connecting pipeline. The rear end joint is also respectively connected to the gas generating device, the gas recovery device and the vacuum forming device. The gas generating device, the gas recovery device and the vacuum forming device are respectively connected to the air intake pipeline, the second air return pipeline and the connecting pipeline via the rear end joint. When the vacuum forming device is working, the vacuum forming layer, the vacuum chamber and the connecting pipeline form a vacuum. The joint is also connected to the main machine electrical signal, which is used for thermocouple temperature signal collection and radio frequency signal transmission respectively. The electrical signal connection part realizes contact connection through a spring ejector structure. One end of the radio frequency signal transmission line is connected to the air intake pipeline, and the radio frequency signal is transmitted to the needle through the air intake pipeline.

[0048] In one embodiment, a hollow handle may be provided outside the vacuum chamber, and the handle covers the vacuum chamber from the outside. The vacuum tube compensation structure assembly of the embodiment of the present application can compensate for the displacement difference caused by the different bending radii between the flexible vacuum outer tube and the vacuum inner tube when the flexible vacuum outer tube is bent.

[0049] The main difference between the flexible multimodal ablation needle in the embodiment of the present application and the traditional multimodal ablation needle (percutaneous puncture type) is that the pipeline of the flexible multimodal ablation needle entering the human body is longer (about 1m), and the outer tube material is usually a flexible polymer material with a high degassing coefficient under vacuum conditions. Therefore, if a conventional probe is used to pre-make a vacuum tube, the high vacuum degree of the flexible probe needle tube will be difficult to maintain for a long time.

[0050] During the operation, the endoscope first passes through the natural cavity of the human body (oral cavity, anus, urethra, etc.), and enters and finds the lesion with the help of the endoscope's own light source and imaging system. Then the flexible ablation device enters through the instrument channel of the endoscope until the lesion tissue is located for surgical treatment, thus solving the technical problem that the metal hard rod of the probe cannot bend and enter the natural cavity and can only enter through needle puncture. It avoids skin damage and bleeding caused by puncture.

[0051] The working modes of existing probes are all single freezing or radio frequency modes, which are difficult to achieve the freezing requirements of precise control and rapid pre-cooling of multimodal ablation. Due to different patients and different lesion organs, the location of the lesion will also be different. For example, if the lesion location is more demanding, the difficulty of the operation will be increased, the time of the operation will be prolonged, and the success rate of the operation will be reduced. The endoscope can enter the demanding lesion location from the natural cavity of the human body through the bending angle of the front end. The flexible multimodal ablation needle uses the internal channel of the endoscope to enter and finally reach the lesion location through its own bending for surgical treatment. The probe can only perform destructive puncture on the tissue, and once the wall of the cavity is penetrated, the result is often fatal.

[0052] The vacuum forming layer, vacuum chamber and connecting pipeline form a vacuum layer structure. The vacuum forming device can evacuate the vacuum layer structure in real time. When the vacuum degree of the vacuum layer structure reaches the required requirement, the multimodal ablation device starts the transmission work. During the entire working period of the flexible multimodal ablation needle, the vacuum forming device always keeps working to ensure the maintenance of the vacuum degree of the vacuum layer structure. When the flexible multimodal ablation needle finishes working, the vacuum forming device also stops working.

[0053] When the multimodal ablation device is working during surgery, the cryogenic medium will reach the needle through the air inlet pipeline to cryoablate the tumor tissue. If frosting occurs on other parts of the ablation device except the needle, the liquid nitrogen cooling will be lost, so that the temperature at the needle cannot reach the cryotherapy temperature, and other frosted parts will damage the normal tissues in the human cavity, so the vacuum layer is indispensable. Real-time vacuuming technology ensures the maintenance of the vacuum degree of the vacuum layer during the operation, improves the success rate of the operation, and the vacuum layer plays an insulating role when the ablation needle is working. At present, the vacuum layer of the probe is mostly pre-processed, rather than real-time suction. If the vacuum layer leaks or the vacuum degree decreases before use, it will cause damage to the patient and the device. The connection method between the connecting pipeline and the vacuum forming device can be a VCR joint sealing connection, or it can be connected and sealed by a metal lead-out tube and a latex tube. There is no restriction on the connection method, as long as it can play a sealing role.

[0054] The concentric structure of the vacuum forming layer, the first return air pipeline and the air intake pipeline is converted into a connecting pipeline surrounding the second return air pipeline and the air intake pipeline. At the same time, the vacuum forming layer is expanded to a vacuum chamber with a larger space, so that the vacuum extraction technology is realized inside the connecting pipeline and the vacuum chamber, and then converted into a parallel tubular structure through the rear end joint, so that each gas path is separated and does not interfere with each other, and a high vacuum degree can be formed.

[0055] The multimodal ablation device has two working modes: cryoablation mode and radiofrequency ablation mode. During treatment, the rapid temperature change from local freezing to sub-high temperature causes the tumor tissue to simultaneously withstand drastic changes in temperature and stress in a short period of time, effectively achieving in situ fragmentation of tumor cells and tumor microvessels, and maximally releasing tumor antigens, immune-related factors, and a large number of danger signals; then, through the continuous warming effect of radiofrequency heating, the body's anti-tumor immune response is further stimulated, thereby achieving the purpose of inhibiting the recurrence and metastasis of solid tumors. In the single cryoablation mode, tumor cells are mechanically destroyed by ice crystals formed by deep freezing, which can release a large number of tumor antigens. However, tumor cells in the sub-low temperature zone at the edge of cryoablation are mainly apoptotic, which can cause immunosuppression. In the single radiofrequency ablation mode, the edge warm area may mobilize the body to have an endogenous immune response during the ablation process, but due to the lack of sufficient tumor-related factors and antigen release, its immunoregulatory effect is weak. The thermocouple can reach the needle 101 position through the vacuum formation layer or through the first return air line. There is no restriction on the arrival method, as long as the radiofrequency ablation function can be achieved. Identification resistors are installed inside the freezing line connector and the radio frequency line 116 connector connected to the host. When the ablation needle is connected to the host, the host can identify whether it is inserted in place. When it is not inserted in place or missed, an alarm will be prompted.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible multi-modal ablation catheter vacuum tube compensation structure assembly, characterized in that: The vacuum tube compensation structure assembly includes: A vacuum forming layer is sandwiched between the flexible vacuum outer tube and the vacuum inner tube; A switching structure having: A vacuum chamber, wherein the distal end of the vacuum chamber is communicated with the vacuum forming layer, and the proximal end of the vacuum chamber is communicated with the connecting pipeline; The vacuum tube compensation structure component is provided with an adjusting member, and the adjusting member is axially slidably arranged between the vacuum outer tube and the vacuum chamber.

2. The vacuum tube compensation structure assembly according to claim 1, characterized in that: The vacuum chamber has a shell, the adjusting member axially passes through the shell and extends to the inside of the shell, the distal end of the adjusting member is slidably and sealingly connected with the vacuum outer tube, and the adjusting member can slide relative to the shell along the axial direction.

3. The vacuum tube compensation structure assembly according to claim 2, characterized in that: The vacuum tube compensation structure assembly also includes a fastener disposed on the housing, and the fastener can fix the adjusting member in the radial direction to limit the axial movement of the adjusting member.

4. The vacuum tube compensation structure assembly according to claim 3, characterized in that: A limiting structure is provided between the adjusting member and the housing. The limiting structure has a planar structure and is used to limit the adjusting member from rotating along the axial direction.

5. The vacuum tube compensation structure assembly according to claim 2, characterized in that: A stopper is disposed at the proximal end of the adjusting member, and a radial length of the stopper is greater than a radial length of the proximal end of the housing.

6. The vacuum tube compensation structure assembly according to claim 5, characterized in that: A sealing ring is arranged on the stopper, and when the adjusting member moves axially to the far end of the shell, the sealing ring forms a seal between the stopper and the shell.

7. A pipeline switching structure, the pipeline switching structure comprising: The vacuum tube compensation structure assembly according to any one of claims 1 to 6; A return air chamber, wherein the distal end of the return air chamber is communicated with the first return air pipeline, and the proximal end of the return air chamber is communicated with the second return air pipeline; An air intake pipeline runs through the vacuum chamber and the air return chamber, the air intake pipeline includes a first portion and a second portion, the vacuum forming layer, the first air return pipeline and the first portion of the air intake pipeline are sequentially arranged from the outside to the inside in the radial direction, the second air return pipeline and the second portion of the air intake pipeline are independent of each other and the connecting pipeline is covered on the outer periphery of the second air return pipeline and the second portion of the air intake pipeline.

8. The pipeline transfer structure according to claim 7, characterized in that: A base is provided at the proximal end of the pipeline transfer structure, and the base is connected to the vacuum chamber and the return air chamber respectively, and the connecting pipeline and the second return air pipeline are connected to the vacuum chamber and the return air chamber respectively via the base, and the air inlet pipeline runs through the base.

9. The pipeline transfer structure according to claim 8, characterized in that: The second return air pipeline is connected to the return air chamber through a transfer pipeline arranged on the base. The transfer pipeline includes a first pipe portion and a second pipe portion extending axially, and a third pipe portion extending radially. The third pipe portion is connected to the first pipe portion and the second pipe portion respectively.

10. The pipeline transfer structure according to claim 9, characterized in that: The connecting pipeline is connected to a vacuum forming device. When the vacuum forming device is in operation, the vacuum forming layer, the vacuum chamber and the connecting pipeline form a vacuum.

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