CN113397690B - Method and system for machining vacuum wall of ablation needle and vacuum wall of ablation needle - Google Patents

Abstract

The present invention provides a method and system for processing a vacuum wall of an ablation needle and a vacuum wall of an ablation needle, wherein the method comprises: applying first solder on a first welding spot, and the first welding spot is arranged on the first inner pipe section the outer wall between the second end and the raised part; the inner tube coated with the first solder is sleeved inside the outer tube to form a nested structure of the inner tube and the outer tube; the nested structure is placed in inside the vacuum chamber of the vacuum tooling; the coil of the high-frequency welding machine is placed in the first position outside the vacuum tooling, and the first welding point is welded with the coil, and the first position matches the The position of the first welding point; taking out the welded nested structure with vacuum interlayer from the vacuum chamber to obtain the vacuum wall of the ablation needle; by means of local heating, the hardness of the metal of the vacuum wall of the ablation needle is maintained.

Description

Method and system for processing vacuum wall of ablation needle and vacuum wall of ablation needle

technical field

The invention relates to the field of medical instruments, in particular to a method and system for processing a vacuum wall of an ablation needle and a vacuum wall of the ablation needle.

Background technique

Cryosurgery, also known as cryotherapy, refers to a clinical medicine that uses low-temperature machinery to control the cooling, freezing and rewarming of the lesion group to cause irreversible damage and necrosis. Cryotherapy has been widely used in clinical treatment due to its advantages of less trauma, better curative effect, less pain and less complications. A cryotherapy system usually includes a cryotherapy host and a cryotherapy device. The cryotherapy host provides cold/heat energy for cryotherapy equipment through liquid nitrogen, nitrogen, argon, helium, electricity, etc. Cryotherapy devices act directly on the human body to achieve disease treatment or induce apoptosis.

The cryoablation needle is a cryotherapy device that directly acts on the human body. The cryoablation needle consists of a connecting part and a vacuum wall of the ablation needle. From a functional point of view, the ablation needle vacuum wall includes a targeted treatment area and a vacuum-protected dissection area. Targeting the treatment area can generate hypothermia, which induces apoptosis. The vacuum protects the dissection area to maintain normal temperature to ensure that normal skin, muscle and other tissues are not frostbitten. From a structural point of view, the vacuum wall of the ablation needle should at least include the inner tube, the outer tube, and the vacuum interlayer between the inner tube and the outer tube.

In the cryotherapy system of the prior art, brazing is generally adopted, and the entire vacuum wall of the ablation needle undergoes a heat treatment, and the internal stress of the metal is released, thereby reducing the hardness of the vacuum wall of the ablation needle, which is inconvenient for percutaneous puncture during the operation. .

SUMMARY OF THE INVENTION

The present invention provides a processing method and system for the vacuum wall of an ablation needle, and a vacuum wall of the ablation needle, so as to solve the problem of decreasing the hardness of the vacuum wall of the ablation needle.

According to a first aspect of the present invention, there is provided a method for processing a vacuum wall of an ablation needle, comprising:

Provide inner and outer tubes;

The inner tube includes a first inner tube section and a second inner tube section; the first end of the first inner tube section is connected to the first end of the second inner tube section; the inner diameter of the second inner tube section is larger than that of the first inner tube section. an inner diameter of an inner pipe section; a raised portion is provided on the outer wall of the first inner pipe section close to the second end of the first inner pipe section;

The outer pipe includes a first outer pipe section, a second outer pipe section and a third outer pipe section, the first end of the second outer pipe section is connected to the first end of the first outer pipe section, and the second outer pipe section is The second end is connected to the first end of the third outer pipe section;

The inner diameter of the third outer tube section matches the outer diameter of the second inner tube section, the inner diameter of the second outer tube section is larger than the inner diameter of the second inner tube section, and the inner diameter of the first outer tube section is larger than the first outer tube section. - the outer diameter of the inner pipe section;

Apply a first solder on a first solder joint, the first solder joint is arranged on the outer wall between the second end of the first inner pipe section and the protruding part;

The inner tube coated with the first solder is sleeved inside the outer tube to form a nested structure of the inner tube and the outer tube;

placing the nested structure in the vacuum chamber of the vacuum tool;

Put the coil of the high-frequency welding machine on the first position outside the vacuum tooling, and use the coil to weld the first welding point, and the first position matches the position of the first welding point;

The welded nested structure with the vacuum interlayer is taken out from the vacuum chamber to obtain the vacuum wall of the ablation needle.

Optionally, the vacuum tooling includes a vacuum cover and a vacuum base, and the vacuum cover and the vacuum base are sealed and connected to form the vacuum chamber;

The nested structure is placed in the vacuum chamber of the vacuum tooling, including:

placing the nested structure on the vacuum base, and sealingly connecting the vacuum cover to the vacuum base;

Put the coil of the high-frequency welding machine in the first position outside the vacuum tooling, which specifically includes:

The coil is placed at the first position outside the vacuum enclosure.

Optionally, the vacuum tooling includes a vacuum pump and a vacuum gauge; the vacuum gauge is used to measure the degree of vacuum in the vacuum chamber, and the vacuum pump is connected to the vacuum chamber;

After the vacuum cover is sealed and connected to the vacuum base, the method further includes:

The vacuum pump is controlled to work so that the vacuum degree in the vacuum chamber reaches the target vacuum degree.

Optionally, the target vacuum degree is 1*10 ^-1 Pa to 1*10 ^-9 Pa.

Optionally, after the inner tube coated with the first solder is sheathed inside the outer tube, the method further includes:

A second solder is smeared on the second solder joint, and the second solder joint is arranged on the second end of the third outer pipe section.

Optionally, after using the coil to weld the first solder joint, the method further includes:

The coil of the high-frequency welding machine is placed in a second position outside the vacuum tooling, and the second welding point is welded by using the coil, and the second position is matched with the position of the second welding point.

Optionally, the vacuum tooling includes an inert gas source;

After using the coil to weld the first solder joint, the method further includes:

Inert gas is introduced into the vacuum chamber.

Optionally, before placing the nested structure in the vacuum chamber of the vacuum tooling, it further includes:

The second welding point is welded in a non-vacuum environment, and the second welding point is provided at the second end of the third outer pipe section.

According to a second aspect of the present invention, an ablation needle vacuum wall is provided, wherein the ablation needle vacuum wall is processed by the processing method described in the first aspect of the present invention and its optional solutions.

According to a third aspect of the present invention, a processing system for a vacuum wall of an ablation needle is provided, which is used for processing an inner tube and an outer tube forming the vacuum wall of an ablation needle; wherein the inner tube comprises a first inner tube section and a second inner tube Two inner pipe sections; the first end of the first inner pipe section is connected to the first end of the second inner pipe section; the inner diameter of the second inner pipe section is larger than the inner diameter of the first inner pipe section; The outer wall of the inner pipe section close to the second end of the first inner pipe section is provided with a raised portion;

The outer pipe includes a first outer pipe section, a second outer pipe section and a third outer pipe section, the first end of the second outer pipe section is connected to the first end of the first outer pipe section, and the second outer pipe section is The second end is connected to the first end of the third outer pipe section;

The inner diameter of the third outer tube section matches the outer diameter of the second inner tube section, the inner diameter of the second outer tube section is larger than the inner diameter of the second inner tube section, and the inner diameter of the first outer tube section is larger than the first outer tube section. - the outer diameter of the inner pipe section;

The processing system includes: a high-frequency welding machine and a vacuum tool,

The vacuum tooling is used for:

After the first solder joint is coated with the first solder, and the inner tube coated with the first solder is sleeved inside the outer tube to form a nested structure of the inner tube and the appearance, the nested structure is accommodated by a vacuum chamber ; Wherein, the first welding point is arranged on the outer wall between the second end of the first inner pipe section and the raised portion;

The high frequency welding machine is used for:

When the coil of the high-frequency welding machine is placed in the first position outside the vacuum tooling, the first welding point is welded with the coil to form a nested structure with a vacuum interlayer, and an ablation needle is obtained The vacuum wall, the first position matches the position of the first welding point.

Optionally, the vacuum tooling is also used for:

After the second solder joint is coated with the second solder, a vacuum chamber is used to accommodate the nested structure; wherein, the second solder joint is provided at the second end of the third outer pipe section.

Optionally, the vacuum tool includes a vacuum cover and a vacuum base, the vacuum cover and the vacuum base are sealed and connected to form the vacuum cavity, and the coil is configured to be able to be sheathed outside the vacuum cover.

Optionally, the vacuum tooling includes a vacuum pump and a vacuum gauge; the vacuum gauge is used to measure the degree of vacuum in the vacuum chamber, and the vacuum pump communicates with the vacuum chamber;

The vacuum pump is used for:

After the vacuum cover is sealed and connected to the vacuum base, the vacuum degree in the vacuum chamber is controlled to be a target vacuum degree.

Optionally, the vacuum tooling further includes a first valve member, the first valve member is connected between the vacuum chamber and the vacuum pump, and the first valve member can open or close the vacuum chamber and the vacuum pump. passages between the vacuum pumps.

Optionally, the vacuum tooling further includes a second valve element and an inert gas source, the second valve element is arranged between the inert gas source and the vacuum chamber, and the second valve element can be opened or closed. cutting off the passage between the vacuum chamber and the inert gas source;

The inert gas source is used for:

After the first welding point is welded by the coil, an inert gas is introduced into the vacuum chamber.

Optionally, the high-frequency welding machine includes a mainframe and the coil, the mainframe is electrically connected to the coil, and the mainframe is used for passing current to the coil.

Optionally, the high-frequency welding machine further includes a driving part, and the driving part is used to drive the coil to move.

The processing method and system for the vacuum wall of the ablation needle and the vacuum wall of the ablation needle provided by the present invention are welded by locally heating the nested structure to form the vacuum wall of the ablation needle with a vacuum interlayer. The processing method of heating the overall structure of the sleeve will not release the internal stress of the metal caused by the heat treatment of the entire inner tube and the outer tube, and the hardness of the metal can be maintained, thereby facilitating the operation. Compared with some solutions, by increasing the vacuum The vacuum interlayer is formed by the mouth, the present invention does not increase the weight of the vacuum wall of the ablation needle, and does not cause displacement of the medical device due to the action of gravity, and the operation is more precise and convenient.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a flow chart 1 of a method for processing a vacuum wall of an ablation needle according to an embodiment of the present invention;

2 is a schematic structural diagram of a nested structure in an embodiment of the present invention;

3 is a second flowchart of a method for processing the vacuum wall of an ablation needle according to an embodiment of the present invention;

FIG. 4 is a partial structural schematic diagram of the processing system after step S103 is executed in an embodiment of the present invention;

5 is a flowchart 3 of a method for processing a vacuum wall of an ablation needle according to an embodiment of the present invention;

6 is a schematic structural diagram 1 of a processing system for the vacuum wall of an ablation needle according to an embodiment of the present invention;

7 is a fourth flowchart of a method for processing a vacuum wall of an ablation needle according to an embodiment of the present invention;

FIG. 8a is a schematic diagram of a partial structure of a processing system performing step S104 in an embodiment of the present invention;

FIG. 8b is a schematic diagram of a partial structure of a processing system performing step S107 in an embodiment of the present invention;

9 is a second structural schematic diagram of a processing system for a vacuum wall of an ablation needle according to an embodiment of the present invention;

FIG. 10 is a flowchart 5 of a method for processing a vacuum wall of an ablation needle according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of the vacuum wall of the ablation needle in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if present) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The technical solutions of the present invention will be described in detail below with specific examples. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Please refer to FIG. 1 , a method for processing a vacuum wall of an ablation needle according to an embodiment of the present invention includes:

Provide inner tube 21 and outer tube 22;

The inner tube 21 includes a first inner tube section 211 and a second inner tube section 212; the first end of the first inner tube section 211 is connected to the first end of the second inner tube section 212; the second inner tube section 212 The inner diameter of the first inner pipe section 211 is larger than the inner diameter of the first inner pipe section 211; a raised portion 23 is provided on the outer wall of the first inner pipe section 211 near the second end of the first inner pipe section;

The outer tube 22 includes a first outer tube section 221, a second outer tube section 222 and a third outer tube section 223. The first end of the second outer tube section 222 is connected to the first end of the first outer tube section 221, so the second end of the second outer pipe section 222 is connected to the first end of the third outer pipe section 223;

The inner diameter of the third outer tube section 223 matches the outer diameter of the second inner tube section 212 , the inner diameter of the second outer tube section 222 is larger than the inner diameter of the second inner tube section 212 , and the first outer tube section 221 The inner diameter is greater than the outer diameter of the first inner pipe section 211;

The inner tube 21 may be a first inner tube section 211 and a second inner tube section 212 with different inner diameters obtained by reducing the diameter of a metal tube, or may be two metal tubes with different inner diameters and the same tube wall thickness obtained after the pipe is welded; the outer pipe 22 may be a second outer pipe section 221, a second outer pipe section 222 and a third outer pipe section 223 with different inner diameters obtained after reducing the diameter of a metal pipe, or it may be three inner diameters It can be obtained by welding different metal pipes with the same thickness of the pipe wall. It can also be obtained by reducing the diameter of a metal pipe to obtain two outer pipe sections. obtained after welding of metal pipes;

The inner tube 21 and the outer tube 22 can be made of metal of the same material or of different materials. When the inner tube 21 and the outer tube 22 are obtained by welding different metal tubes, the inner tube 21 and the outer tube 22 can also be obtained by welding. Metal pipes of different materials are respectively used for welding; wherein the raised part 23 can be a part of the first inner pipe section, or it can be welded to the outer wall of the first inner pipe section, and then when the raised part 23 is welded to the outer wall of the first inner pipe section When the first inner pipe section is smeared, the raised part 23 can be selected from a different metal from the first inner pipe section; the raised part 23 can be used to limit the first solder, so as to prevent the first solder from being smeared, its position will move, and the quality of the welding will be affected;

S101: smear the first solder on the first solder joint;

The first solder joint is arranged on the outer wall between the second end of the first inner pipe section 211 and the raised portion 23; the melting point of the first solder is lower than the melting point of the inner pipe and the outer pipe, which can be determined according to According to different application scenarios or needs, use suitable inner and outer tubes, and select the appropriate first solder;

S102: Sleeve the inner tube coated with the first solder inside the outer tube to form a nested structure of the inner tube and the outer tube;

S103: placing the nested structure in the vacuum chamber of the vacuum tool;

S104: Put the coil of the high-frequency welding machine in a first position outside the vacuum tooling, and use the coil to weld the first solder joint;

The first position matches the position of the first solder joint; it can be understood that the first position is the same height as the first solder joint, and the coil can be placed outside the vacuum tooling. Further, the first position is the same height as the first solder joint. The first solder joint has the same height, and the coil can be placed outside the vacuum cover of the vacuum tool;

S105: Take out the welded nested structure with the vacuum interlayer from the vacuum chamber to obtain the vacuum wall of the ablation needle.

The nested structure 2 formed in step S102 can be, for example, as shown in FIG. 2. After the nested structure 2 is placed in the vacuum chamber, the nested structure 2 is subjected to vacuum treatment, and the vacuum degree of the nested structure 2 will change, corresponding to The vacuum degree of the vacuum interlayer 26 will also change, and finally reach the required vacuum degree.

Referring to FIGS. 3 to 4 , in one embodiment, the vacuum tooling 31 includes a vacuum cover 311 and a vacuum base 312 , and the vacuum cover 311 is sealedly connected with the vacuum base 312 to form the vacuum chamber 313 ;

The vacuum cover 311 is made of non-metallic and transparent material, and the vacuum cover 311 can withstand high temperature. The shape of the vacuum cover 311 can be cylindrical, square, or special, such as the shape of the nested structure that can be welded as required, Carry out profiling design;

Step S103 specifically includes:

placing the nested structure on the vacuum base, and sealingly connecting the vacuum cover to the vacuum base;

Specifically, for example, as shown in FIG. 4 , the nesting structure 2 is fixed on the vacuum base 312 , that is, the second end of the second inner pipe section 212 is sleeved on the connecting part of the vacuum base 312 , and the vacuum cover 311 is sleeved on the nesting The outside of the structure 2 is sealed and connected to the vacuum base 312 ; the sealed space formed by the vacuum cover 311 and the vacuum base 312 is the vacuum chamber 313 .

Step S104 specifically includes:

The coil is sheathed at the first position outside the vacuum enclosure, and the first welding point is welded by the coil.

Referring to FIGS. 5 to 6 , in one embodiment, the vacuum tool 31 includes a vacuum pump 314 and a vacuum gauge 315 ; the vacuum gauge 315 is used to measure the degree of vacuum in the vacuum chamber 313 , and the vacuum pump 314 is connected to The vacuum chamber 313; the communication therein can be connected by a pipeline, that is, the vacuum pump 314 is connected to the vacuum chamber 313 through a pipeline;

After step S103, it also includes:

S106: Control the vacuum pump to work so that the vacuum degree in the vacuum chamber reaches a target vacuum degree.

In one embodiment, the target vacuum degree is 1*10 ^-1 Pa to 1*10 ^-9 Pa.

Further, step S106 may specifically be:

Turn on the vacuum pump 314, vacuum the vacuum chamber 313, observe the vacuum gauge 315, when the vacuum gauge 315 measures that the vacuum degree in the vacuum chamber 313 reaches 1* ^10-1 Pa～1* ^10-9 Pa, turn off the vacuum pump 314 .

Referring to FIG. 7 to FIG. 8b, in one embodiment, step S102 specifically includes:

The inner tube coated with the first solder is sleeved inside the outer tube, and the second solder is smeared at the second solder joint to form a nested structure of the inner tube and the outer tube;

The second solder joint is arranged at the second end of the third outer tube section 223; the melting point of the second solder is lower than the melting point of the inner tube and the outer tube, and a suitable inner tube can be used according to different application scenarios or requirements. tube, outer tube, and select a suitable second solder;

The second solder in step S102 and the first solder in step S101 may be solder of the same material, or may be solder of different materials;

In an embodiment, after step S104, it further includes:

S107: Put the coil of the high-frequency welding machine in a second position outside the vacuum tooling, and use the coil to weld the second welding point;

The second position matches the position of the second solder joint, which can be understood as the position where the second position is the same height as the second solder joint, and the coil can be sleeved outside the vacuum tooling. The second solder joint has the same height, and the coil can be sheathed outside the vacuum cover of the vacuum tooling.

In an example, the positional relationship between the coil and the vacuum cover in step S104 may be, for example, FIG. 8a , and the positional relationship between the coil and the vacuum cover in step S107 may be, for example, FIG. 8b .

In an example, the first solder joint and the second solder joint are made of different materials, and both have a lower melting point than the metal of the inner tube and the outer tube. The currents can be different.

In one example, step S107 can be executed before step S104 is executed, that is, the execution order of step S107 and step S104 can be exchanged; in another example, the high-frequency welding machine can include two coils, and then the first welding point and the second welding point can be exchanged. Two solder joints can be welded at the same time, increasing the welding speed.

In an example, after one of the steps S104 and S107 is performed, the other step may be performed after the solder is cooled and solidified.

Please refer to FIG. 9, in one embodiment, the vacuum tooling includes an inert gas source;

After step S104, it also includes:

S108: Passing an inert gas into the vacuum chamber.

In the above embodiments, by introducing an inert gas into the vacuum chamber, the cooling and solidification of the solder at the solder joint can be accelerated, and at the same time, oxidation of the solder in the solder joint can be prevented due to the protection of the inert gas.

Wherein, when step S104 and step S107 are performed simultaneously, step S108 may be performed once after performing step S104 and step S107 respectively, or step S108 may be performed after performing step S104 and step S107.

Referring to FIG. 10 , in an embodiment, before step S103, it further includes:

S109: Solder the second solder joint in a non-vacuum environment.

The non-vacuum environment in step S109 can be understood that when step S109 is performed, it does not need to be carried out in a vacuum chamber, and the welding method can be the same as that in step S107, and the coil of a high-frequency welding machine is used for welding. For example, the coil can be directly wrapped. Welding at the second welding point of the nested structure can also be different from the welding method in step S107, such as argon arc welding, laser welding, brazing, friction welding, resistance welding, soldering, etc., as long as the first welding can be achieved. Welding at the two solder joints is sufficient.

Step S109 and step S107 are both welding at the second solder joint. It can be seen that step S107 and step S109 can be executed alternatively. When step S109 is selected to be executed, step S109 needs to be executed before step S103 is executed.

Please refer to FIG. 11 , an embodiment of the present invention also provides an ablation needle vacuum wall 4 , the ablation needle vacuum wall 4 is processed by the aforementioned processing method, that is, the nested structure 2 is obtained after vacuum welding An ablation needle vacuum wall 4, the ablation needle vacuum wall 4 includes an inner tube 21 and an outer tube 22; the inner tube 21, the appearance 22, etc. can be understood with reference to the foregoing description.

The outer wall of the first inner tube section 211 away from the second end of the second inner tube section 212 is hermetically connected to the inner wall of the first outer tube section 221 through the first solder 24, and the third outer tube section 223 is far away from all The second end of the second outer pipe section 222 is hermetically connected to the outer wall of the second inner pipe section 212 through the second solder 25;

The outer tube 22 and the inner tube 21 are connected in vacuum through a vacuum interlayer 26 .

In some examples, an ablation needle is also provided. The ablation needle includes an ablation needle connecting part and the aforementioned ablation needle vacuum wall. The ablation needle connecting part is used to connect the ablation needle vacuum wall and a cryotherapy host, and the cryotherapy host passes through liquid nitrogen, Nitrogen, argon, helium, electrification, etc., provide cold/hot energy for cryotherapy equipment; send energy to the vacuum wall of the ablation needle through the connection part of the ablation needle, after the targeted treatment area of the vacuum wall of the ablation needle receives the cold energy , acting on the area to be treated, the area of the vacuum wall of the ablation needle that is wrapped by the vacuum interlayer is kept at room temperature due to the heat insulation function of the vacuum interlayer to ensure that normal skin, muscle and other tissues are not frostbitten.

Referring to FIG. 6 , an embodiment of the present invention further provides a processing system for ablation needle vacuum wall, which is used to perform or assist in performing the aforementioned processing method, including high-frequency welding 32 and vacuum tooling 31 ;

The vacuum tooling 31 is used for:

After the first solder joint is coated with the first solder 24, and the inner tube 21 coated with the first solder is sleeved inside the outer tube 22 to form the nested structure 2 of the inner tube 21 and the outer appearance 22, the vacuum chamber 313 is used. accommodating the nested structure 2; wherein, the first welding point is arranged on the outer wall between the second end of the first inner pipe section 211 and the raised portion 23;

The high frequency welding machine 32 is used for:

When the coil 321 of the high-frequency welding machine is sheathed at the first position outside the vacuum tooling 31 , the first welding point is welded by the coil 321 to form a nested structure with a vacuum interlayer 26 2. Obtain the vacuum wall 4 of the ablation needle, and the first position matches the position of the first welding point.

In one embodiment, the vacuum tooling is also used for:

After the second solder 25 is applied to the second solder joint, the nested structure 2 is accommodated by the vacuum chamber 313 ; wherein, the second solder joint is provided at the second end of the third outer pipe section 223 .

In one embodiment, the vacuum tool 31 includes a vacuum cover 311 and a vacuum base 312, the vacuum cover 311 is sealedly connected with the vacuum base 312 to form the vacuum cavity 313, and the coil 321 is configured to be able to be sheathed in the vacuum base 312. outside the vacuum cover 311 .

In one embodiment, the vacuum tooling 31 includes a vacuum pump 314 and a vacuum gauge 315; the vacuum gauge 315 is used to measure the degree of vacuum in the vacuum chamber 313, and the vacuum pump 314 communicates with the vacuum chamber 313;

The vacuum pump is used for:

After the vacuum cover is sealed and connected to the vacuum base, the vacuum degree in the vacuum chamber is controlled to be a target vacuum degree.

In one embodiment, the vacuum tooling 31 further includes a first valve member 316, the first valve member 316 is connected between the vacuum chamber 313 and the vacuum pump 314, and the first valve member 316 can be opened Or the passage between the vacuum chamber 313 and the vacuum pump 314 is closed.

The first valve member 316 may be a solenoid valve, and its opening and closing are controlled by the host computer, or it may be a manually controlled valve member.

Referring to FIG. 9 , in one embodiment, the vacuum tooling 31 further includes a second valve member 317 and an inert gas source 318 , and the second valve member 317 is disposed between the inert gas source 318 and the vacuum chamber 313 Between, the second valve member 317 can open or close the passage between the vacuum chamber 313 and the inert gas source 318;

The inert gas source is used for:

After the first welding point is welded by the coil, an inert gas is introduced into the vacuum chamber.

The second valve member 317 can be a solenoid valve, and its opening and closing are controlled by the host computer, or it can be a manually controlled valve member.

In one embodiment, the high-frequency welding machine 32 includes a mainframe 322 and the coil 321 , the mainframe 322 is electrically connected to the coil 321 , and the mainframe 322 is used for passing current to the coil 321 .

In one embodiment, the high-frequency welding machine 32 further includes a driving part, and the driving part is used to drive the coil 321 to move. Further, the driving part can be connected to the host to drive the coil to move, so as to realize the change of the relative position between the coil and the vacuum chamber.

In an example, the change of the relative position between the coil and the vacuum chamber can be realized by controlling the movement of the vacuum base and the vacuum cover.

6 and 9, the processing method of the vacuum wall of the ablation needle in an embodiment of the present invention is described:

First, steps S101, S102, and S103 are performed, namely placing the nested structure 2 on the vacuum base 312 vertically, and then sealingly connecting the vacuum cover 311 to the vacuum base 312;

Then, the first valve member 316 is opened, and step S106 is performed, that is, the vacuum pump 314 is operated to evacuate the vacuum chamber 311 between the vacuum cover 311 and the vacuum base 312, and the vacuum gauge 315 is observed until the vacuum degree of the vacuum chamber 311 is reached. The target vacuum degree is reached; further, the target vacuum degree is between 1*10-1Pa～1*10-9Pa; at this time, the nested structure 2 is in the target vacuum atmosphere.

Then, perform steps S104 and S107, that is, the coil 321 is sheathed outside the vacuum cover 311, and the relative position of the coil 321 and the nested structure 2 is adjusted so that the coil 321 is located on the same plane as the first solder joint and the second solder joint, respectively. At this time, the host 322 is operated to generate high temperature at the first solder joint and the second solder joint, the first solder 24 and the second solder 25 are fully melted, and the inner tube 21 and the outer tube 22 are connected as a whole to form the vacuum interlayer 26 . .

Finally, after the solder is solidified and the temperature of the welding place drops to an appropriate temperature, the first valve member 316 is closed, and step S105 is performed to open the sealed connection between the vacuum cover 311 and the vacuum base 315, and take out the ablation needle vacuum wall 4 .

The processing method of the vacuum wall of the ablation needle in another embodiment of the present invention is as follows:

First of all, in a non-vacuum environment, the execution steps are to execute steps S101, S102, and S109 in sequence to realize welding and sealing of the second welding point; the welding method may be argon arc welding, laser welding, high-frequency welding, brazing, friction welding, Resistance welding, soldering;

Then, step S103 is performed, namely placing the nested structure 2 on the vacuum base 312 vertically, and then sealingly connecting the vacuum cover 311 to the vacuum base 312;

Then, close the second valve member 317, open the first valve member 316, and perform step S106, that is, operate the vacuum pump 314 to evacuate the vacuum chamber 311 between the vacuum cover 311 and the vacuum base 312, and observe the vacuum gauge 315 , until the vacuum degree of the vacuum chamber 311 reaches the target vacuum degree; further, the target vacuum degree is between 1*10-1Pa~1*10-9Pa; at this time, the nested structure 2 is in the target vacuum atmosphere, and the vacuum The gas in the interlayer 26 is extracted from the first solder joint.

Then, step S104 is performed, that is, the coil 321 is sheathed outside the vacuum cover 311, and the relative position of the coil 321 and the nested structure 2 is adjusted so that the coil 321 and the first solder joint are on the same plane. A high temperature is generated at a solder joint, the first solder 24 is fully melted, and the inner tube 21 and the outer tube 22 are connected as a whole to form a vacuum interlayer 26 .

Then, the heating is stopped, and after the first solder 24 is solidified, the first valve member 316 is closed, and the second valve member 317 is opened, so that the inert gas in the inert gas source 318 enters the vacuum cover 311 to accelerate the cooling of the first solder joint . At the same time, due to the protection of the inert gas, the oxidation of the first solder joint is prevented.

Finally, step S105 is performed, the sealed connection between the vacuum cover 311 and the vacuum base 312 is opened, and the vacuum wall 4 of the ablation needle is taken out.

In the description of this specification, description with reference to the terms "one embodiment", "an embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one implementation of the present disclosure example or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (17)

1. a processing method of ablation needle vacuum wall, is characterized in that, comprises: Provide inner and outer tubes; The inner tube includes a first inner tube section and a second inner tube section; the first end of the first inner tube section is connected to the first end of the second inner tube section; the inner diameter of the second inner tube section is larger than that of the first inner tube section. an inner diameter of an inner pipe section; a raised portion is provided on the outer wall of the first inner pipe section close to the second end of the first inner pipe section; The outer pipe includes a first outer pipe section, a second outer pipe section and a third outer pipe section, the first end of the second outer pipe section is connected to the first end of the first outer pipe section, and the second outer pipe section is The second end is connected to the first end of the third outer pipe section; The inner diameter of the third outer tube section matches the outer diameter of the second inner tube section, the inner diameter of the second outer tube section is larger than the inner diameter of the second inner tube section, and the inner diameter of the first outer tube section is larger than the first outer tube section. - the outer diameter of the inner pipe section; Apply a first solder on a first solder joint, the first solder joint is arranged on the outer wall between the second end of the first inner pipe section and the protruding part; The inner tube coated with the first solder is sleeved inside the outer tube to form a nested structure of the inner tube and the outer tube; placing the nested structure in the vacuum chamber of the vacuum tool; Put the coil of the high-frequency welding machine on the first position outside the vacuum tooling, and use the coil to weld the first welding point, and the first position matches the position of the first welding point; The welded nested structure with the vacuum interlayer is taken out from the vacuum chamber to obtain the vacuum wall of the ablation needle. 2 . The method for processing a vacuum wall of an ablation needle according to claim 1 , wherein the vacuum tool comprises a vacuum cover and a vacuum base, and the vacuum cover is sealedly connected with the vacuum base to form the vacuum cavity; 3 . The nested structure is placed in the vacuum chamber of the vacuum tooling, including: placing the nested structure on the vacuum base, and sealingly connecting the vacuum cover to the vacuum base; Put the coil of the high-frequency welding machine in the first position outside the vacuum tooling, which specifically includes: The coil is placed at the first position outside the vacuum enclosure. 3 . The method for processing a vacuum wall of an ablation needle according to claim 2 , wherein the vacuum tool comprises a vacuum pump and a vacuum gauge; the vacuum gauge is used to measure the degree of vacuum in the vacuum chamber, and the vacuum pump communicating with the vacuum chamber; After the vacuum cover is sealed and connected to the vacuum base, the method further includes: The vacuum pump is controlled to work so that the vacuum degree in the vacuum chamber reaches the target vacuum degree. 4 . The method for processing a vacuum wall of an ablation needle according to claim 3 , wherein the target vacuum degree is 1*10 ^-1 Pa to 1*10 ^-9 Pa. 5 . 5 . The method for processing a vacuum wall of an ablation needle according to claim 1 , wherein after the inner tube coated with the first solder is sheathed inside the outer tube, the method further comprises: 6 . A second solder is smeared on the second solder joint, and the second solder joint is arranged on the second end of the third outer pipe section. 6 . The method for processing a vacuum wall of an ablation needle according to claim 5 , wherein after the first welding point is welded by using the coil, the method further comprises: 7 . The coil of the high-frequency welding machine is placed in a second position outside the vacuum tooling, and the second welding point is welded by using the coil, and the second position is matched with the position of the second welding point. 7. The method for processing a vacuum wall of an ablation needle according to claim 1, wherein the vacuum tool comprises an inert gas source; After using the coil to weld the first solder joint, the method further includes: Inert gas is introduced into the vacuum chamber. 8 . The method for processing a vacuum wall of an ablation needle according to claim 1 , wherein before placing the nested structure in the vacuum chamber of the vacuum tool, the method further comprises: 9 . The second welding point is welded in a non-vacuum environment, and the second welding point is provided at the second end of the third outer pipe section. 9 . An ablation needle vacuum wall, characterized in that, the ablation needle vacuum wall is processed by the processing method according to any one of claims 1 to 8 . 10. A processing system for a vacuum wall of an ablation needle, characterized by being used for processing an inner tube and an outer tube for forming the vacuum wall of an ablation needle; wherein the inner tube comprises a first inner tube section and a second inner tube section; The first end of the first inner tube section is connected to the first end of the second inner tube section; the inner diameter of the second inner tube section is larger than the inner diameter of the first inner tube section; close to the first inner tube section The outer wall of the second end of the first inner pipe section is provided with a raised portion; The outer pipe includes a first outer pipe section, a second outer pipe section and a third outer pipe section, the first end of the second outer pipe section is connected to the first end of the first outer pipe section, and the second outer pipe section is The second end is connected to the first end of the third outer pipe section; The inner diameter of the third outer tube section matches the outer diameter of the second inner tube section, the inner diameter of the second outer tube section is larger than the inner diameter of the second inner tube section, and the inner diameter of the first outer tube section is larger than the first outer tube section. - the outer diameter of the inner pipe section; The processing system includes: a high-frequency welding machine and a vacuum tool, The vacuum tooling is used for: After the first solder joint is coated with the first solder, and the inner tube coated with the first solder is sleeved inside the outer tube to form a nested structure of the inner tube and the appearance, the nested structure is accommodated by a vacuum chamber ; Wherein, the first welding point is arranged on the outer wall between the second end of the first inner pipe section and the raised portion; The high frequency welding machine is used for: When the coil of the high-frequency welding machine is placed in the first position outside the vacuum tooling, the first welding point is welded with the coil to form a nested structure with a vacuum interlayer, and an ablation needle is obtained The vacuum wall, the first position matches the position of the first welding point. 11. The processing system for the vacuum wall of the ablation needle according to claim 10, wherein the vacuum tool is further used for: After the second solder joint is coated with the second solder, a vacuum chamber is used to accommodate the nested structure; wherein, the second solder joint is provided at the second end of the third outer pipe section. 12 . The processing system of the vacuum wall of an ablation needle according to claim 10 , wherein the vacuum tooling comprises a vacuum cover and a vacuum base, and the vacuum cover is sealedly connected with the vacuum base to form the vacuum cavity, and the The coil is configured to be able to be sheathed outside the vacuum enclosure. 13 . The processing system of the vacuum wall of the ablation needle according to claim 12 , wherein the vacuum tool comprises a vacuum pump and a vacuum gauge; the vacuum gauge is used to measure the degree of vacuum in the vacuum chamber, and the vacuum pump communicating with the vacuum chamber; The vacuum pump is used for: After the vacuum cover is sealed and connected to the vacuum base, the vacuum degree in the vacuum chamber is controlled to be a target vacuum degree. 14 . The processing system for ablation needle vacuum wall according to claim 13 , wherein the vacuum tool further comprises a first valve member, and the first valve member is connected between the vacuum chamber and the vacuum pump. 15 . , the first valve member can open or close the passage between the vacuum chamber and the vacuum pump. 15 . The processing system for the vacuum wall of the ablation needle according to claim 10 , wherein the vacuum tool further comprises a second valve member and an inert gas source, and the second valve member is arranged between the inert gas source and the inert gas source. 16 . Between the vacuum chambers, the second valve member can open or close the passage between the vacuum chamber and the inert gas source; The inert gas source is used for: After the first welding point is welded by the coil, an inert gas is introduced into the vacuum chamber. 16. The processing system of the vacuum wall of the ablation needle according to claim 10, wherein the high-frequency welding machine comprises a main machine and the coil, the main machine is electrically connected to the coil, and the main machine is used to provide the The coil is fed with current. 17 . The processing system of the vacuum wall of the ablation needle according to claim 10 , wherein the high-frequency welding machine further comprises a driving part, and the driving part is used for driving the coil to move. 18 .

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