CN115256956B

CN115256956B - Welding equipment and process for target balloon dilation catheter

Info

Publication number: CN115256956B
Application number: CN202210899657.0A
Authority: CN
Inventors: 周雁飞; 涂迎春; 黄佩佩; 郑从胜
Original assignee: Shenzhen Shunmei Medical Co ltd; Huizhou Shunmei Medical Technology Co ltd
Current assignee: Shenzhen Shunmei Medical Co ltd; Huizhou Shunmei Medical Technology Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-04-28
Anticipated expiration: 2042-07-28
Also published as: CN115256956A

Abstract

The invention discloses a welding device and a welding process of a target balloon dilation catheter, wherein the welding device comprises a fixing mechanism and a welding mechanism, the fixing mechanism comprises a base component and a fixing component, and the base component is used for bearing; the fixed subassembly includes movable part and extruded piece, and the movable part sets up in the base subassembly, and the movable part treats the welding pipe and bear, and the quantity of movable part is two, and sets up relatively, and the extruded piece sets up in the movable part. This application is through setting up extrusion subassembly for when welding balloon pipe, can be with a pipe link outside and another pipe link inboard connection through welding subassembly, and extrude the pipe to the link through the extrusion piece, the intraductal atmospheric pressure of pipe produces by inside-out pressure to the link, and extrudees the link by outside-in through the weldment, thereby reinforcing hot melt welded welding pressure, and the length of cooperation superimposed mode growth link, and then improve the tensile strength of welding point, thereby ensure balloon pipe's life.

Description

Welding equipment and process for target balloon dilation catheter

Technical Field

The invention relates to the field of medical catheters, in particular to a welding device and a welding process of a target balloon dilation catheter.

Background

The interventional therapy is a minimally invasive high-tech treatment technology and has the characteristics of small wound, rapid postoperative recovery, multiple indications and the like. In recent years, the rapid development has become the third clinical department parallel to the traditional internal medicine and surgery, and the traditional balloon dilation catheter expands and doses the parts such as vascular thrombosis or occlusion by going deep into the blood vessel, thereby achieving the treatment effect.

When the balloon dilation catheter is prepared in the prior art, the balloon is welded in a hot melting mode, the connecting end of the catheter is subjected to hot melting in the traditional hot melting welding mode, and the hot melting end can be bonded together after being cooled in a pressing mode, but in the welding mode, the tensile strength of the welding point is lower, the connecting area of the welding part is small, and when the balloon dilation catheter is subjected to tensile force, the condition of fracture easily occurs, so that the normal use of the balloon dilation catheter is affected.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a welding device and a welding process of a target balloon dilation catheter.

The invention discloses a welding device and a welding process of a target balloon dilation catheter, comprising the following steps of

The fixing mechanism comprises a base component and a fixing component, wherein the base component is used for bearing; the fixed assembly comprises a movable piece and an extrusion piece, wherein the movable piece is arranged on the base assembly and is used for bearing a catheter to be welded, the number of the movable pieces is two and is arranged oppositely, the extrusion piece is arranged on the movable piece and is matched with the movable piece to fix the catheter; and

the welding mechanism comprises a hot melting assembly, a welding assembly and an extrusion assembly, wherein the hot melting assembly comprises a heating piece and a gas transmission groove, the heating piece is arranged on the base assembly and is used for heating the connecting end of the guide pipe, the gas transmission groove is formed in the heating piece, one end of the heating piece is connected with the outside, the other end of the heating piece penetrates through two ends of the heating piece, the inner cavities of the connecting end of the guide pipe to be welded are communicated, and gas is injected into the guide pipe; the welding assembly comprises a welding hole and a welding piece, the welding hole is formed in the heating piece, the welding hole is positioned at one side of the through hole of the gas transmission groove, the welding piece is arranged in the welding hole, and the welding piece applies pressure inwards to the outer side of the connecting end of the guide pipe; the extrusion assembly comprises a pressing piece, wherein the pressing piece is arranged on the extrusion piece, and the pressing piece applies pressure to the extrusion piece to enable the extrusion piece to extrude gas in the guide pipe to the middle.

According to one embodiment of the invention, the weld is a balloon and the injection or removal of gas alters the pressure of the weld against the catheter.

According to an embodiment of the invention, the welding assembly further comprises a communication hole, the communication hole is arranged on the heating element, and the communication hole communicates the welding element inflating cavity with the gas transmission groove.

According to one embodiment of the invention, the welding mechanism further comprises a pressurizing assembly, the pressurizing assembly comprises a gas storage cavity, a fixing piece and a pressurizing piece, the gas storage cavity is formed in the heating piece and communicated with the welding piece inflating cavity, the fixing piece is arranged in the gas storage cavity, the fixing piece is located on one side, far away from the welding hole, of the gas storage cavity and made of magnetic materials, the pressurizing piece is arranged in the gas storage cavity and located on one side, close to the welding hole, of the gas storage cavity, the pressurizing piece is made of soft magnetic materials, and magnetic poles at the adjacent ends of the pressurizing piece and the fixing piece are identical.

According to one embodiment of the invention, the adjacent ends of the two movable pieces are provided with auxiliary surfaces, the upper ends of the auxiliary surfaces are inclined surfaces, the lower ends of the auxiliary surfaces are vertical surfaces, the lower ends of the heating pieces are connected with auxiliary blocks, the lower ends of the auxiliary blocks are inclined surfaces, and the upper ends of the auxiliary blocks are vertical surfaces.

According to one embodiment of the present invention, the pressing assembly further includes a pressing surface disposed on the pressing member, and the pressing member is a slope and applies a pushing force to the pressing member moving toward the heating member.

According to an embodiment of the invention, the extrusion assembly further comprises a driving piece and a buffer piece, wherein the driving piece is connected with the pressing piece, the driving piece drives the pressing piece to apply thrust to the extrusion piece, and the buffer piece is arranged between the driving piece and the pressing piece, and two ends of the buffer piece are respectively connected with the driving piece and the pressing piece to buffer the driving piece and the pressing piece.

According to one embodiment of the invention, the fixing assembly further comprises a gland piece, the gland piece is located at one end of the movable piece, the pressing piece is connected with the gland piece, and the gland piece is removed or installed to fix or release the catheter.

According to an embodiment of the invention, the fixing assembly further comprises an elastic piece, the elastic piece is arranged between the movable piece and the base assembly, two ends of the elastic piece are respectively connected with the movable piece and the base assembly, and thrust force for moving the movable piece in the direction of the heating piece is applied to the movable piece.

A welding process of a target balloon dilation catheter, comprising the steps of:

firstly, a conduit to be welded is fixed on a movable piece in a matched manner through an extrusion piece and a gland piece;

the connecting end of the conduit is subjected to hot melting through the hot melting assembly, and gas is conveyed into the conduit, so that the internal pressure of the conduit is greatly increased and swelled;

aligning the conduit connecting end through the welding assembly, applying pressure inwards to the conduit connecting end, and applying pressure to the conduit connecting end from inside to outside under the action of the extrusion assembly, so that the conduit connecting part is extruded;

when the temperature of the connecting end of the conduit is gradually reduced, under the effect that the pressurizing assembly transmits gas into the welding piece, the pressure born by the connecting end of the conduit is gradually enhanced, the hot-melt welding effect is further enhanced, and the conduit welding is completed.

The beneficial effects of this application lie in: through setting up extrusion subassembly for when carrying out the welding to the sacculus pipe, can be with a pipe link outside and another pipe link inboard connection through welding subassembly, and extrude the pipe to the link through the extrusion piece, the intraductal atmospheric pressure of pipe produces by inside-out pressure to the link, and extrudees the link from outside-in through the weldment, thereby reinforcing hot melt welded welding pressure, and the length of cooperation superimposed mode growth link, and then improve the tensile strength of welding point, thereby ensure the life of sacculus pipe.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic structural view of a target balloon dilation catheter;

FIG. 2 is a schematic structural view of a welding apparatus for a target balloon dilation catheter in an embodiment;

FIG. 3 is another schematic structural view of a welding apparatus for a target balloon dilation catheter in an embodiment;

FIG. 4 is a schematic view of a heating element according to an embodiment;

FIG. 5 is a schematic view of a movable member according to an embodiment;

FIG. 6 is another schematic view of a heating element according to an embodiment;

FIG. 7 is a schematic view of the structure of the pressing member in the embodiment;

FIG. 8 is a flow chart of a welding process for a target balloon dilation catheter in an embodiment.

In the drawings, a 1-fixing mechanism and a 2-welding mechanism;

11-a base assembly, 12-a fixing assembly;

21-a hot melting assembly, 22-a welding assembly, 23-an extrusion assembly and 24-a pressurizing assembly;

121-movable member, 122-pressing member, 123-pressing member, 124-elastic member;

211-heating parts, 212-gas transmission grooves;

221-welding holes, 222-welding pieces, 223-communication holes;

231-pressing part, 232-pressing surface, 233-driving part, 234-buffer part, 235-guide groove;

241-gas storage chamber, 242-securing member, 243-plenum;

1211-auxiliary surface;

2111-auxiliary block.

Detailed Description

Various embodiments of the invention are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Moreover, for the sake of simplicity of the drawing, some well-known and conventional structures and elements are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of the "first", "second", etc. in this application are for descriptive purposes only and are not intended to specifically indicate a sequential or a cis-position, nor are they intended to limit the invention, but are merely intended to distinguish between components or operations described in the same technical term, and are not to be construed as indicating or implying a relative importance or implying that the number of technical features indicated is not necessarily limited. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:

referring to fig. 1, fig. 1 is a schematic structural view of a target balloon dilation catheter. The target balloon dilation catheter has a targeting guiding function, the balloon body is prepared from a high-compliance and developing mixed extrusion material, the prepared high-compliance developing balloon body can be fully developed under digital developing equipment, and the high-compliance balloon body can be immediately deformed when a guide wire or catheter touches the balloon body in a human blood vessel, so that an operator can immediately judge that the guide wire or catheter reaches a target blood vessel area under the digital developing equipment or immediately judge that the guide wire or catheter reaches the target blood vessel area by touching the guide wire or catheter by hand, the position of the guide wire or catheter is conveniently located when the guide wire or catheter is normally used, the guide wire or catheter can conveniently find a path from a human blood vessel interlayer or a false cavity to reach a required target blood vessel position, the false cavity is conveniently found to reach a true cavity, and an intervention instrument can be guided when the reverse operation is performed in a blood vessel, so that a reverse intervention channel is quickly and accurately established, and the treatment efficiency is ensured, and the condition that the guide wire or the guide catheter can not be judged to actually reach the position in the blood vessel when the treatment is performed is avoided, and the treatment efficiency is influenced is avoided.

Referring to fig. 2 to 4, fig. 2 is a schematic structural view of a welding apparatus for a target balloon dilation catheter in an embodiment, fig. 3 is another schematic structural view of a welding apparatus for a target balloon dilation catheter in an embodiment, and fig. 4 is a schematic structural view of a heating member in an embodiment. The welding equipment and the welding process of the target balloon dilation catheter in the embodiment comprise a fixing mechanism 1 and a welding mechanism 2, wherein the fixing mechanism 1 comprises a base component 11 and a fixing component 12, and the base component 11 is used for bearing; the fixing component 12 comprises a movable part 121 and an extrusion part 122, the movable part 121 is arranged on the base component 11, the movable part 121 supports a conduit to be welded, the movable parts 121 are two in number and are oppositely arranged, the extrusion part 122 is arranged on the movable part 121, the extrusion part 122 is matched with the movable part 121 to fix the conduit, so that conduit welding ends can be respectively arranged on the two movable parts 121, the conduit is fixed through the extrusion part 122, the welding mechanism 2 comprises a hot melting component 21, a welding component 22 and an extrusion component 23, the hot melting component 21 comprises a heating part 211 and a gas transmission groove 212, the heating part 211 is arranged on the base component 11 and heats the conduit connecting ends, after the conduit is fixed, the connecting ends of the conduit are contacted with the two ends of the heating part 211, after the heating part 211 is heated, the outermost side of the conduit connecting ends can be heated through heat conduction, the gas transmission groove 212 is formed in the heating part 211, one end of the heating part 211 is connected with the outside, the other end of the heating part 211 penetrates through the two ends of the heating part 211, the conduit connecting ends to be communicated with each other, gas to be welded is injected into the conduit connecting end cavity, and the conduit connecting end to be heated, the conduit connecting end is heated, the gas can flow into the conduit connecting end to the conduit through the inner side, and the conduit connecting end is heated by heat, and the gas pressure is increased, and the conduit is heated by the temperature, and the conduit connecting end is heated; the welding assembly 22 comprises a welding hole 221 and a welding piece 222, wherein the welding hole 221 is formed in the heating piece 211, the welding hole 221 is positioned at one side of a through hole of the gas transmission groove 212, so that after the pipe is subjected to hot melting, the heating piece 211 can move to enable the connecting end of the pipe to extend into the welding hole 221, the pipe is welded, the welding piece 222 is arranged in the welding hole 221, the welding piece 222 applies pressure inwards to the outer side of the connecting end of the pipe, and the welding piece 222 is in a ring shape, so that after the connecting end of the pipe extends into the welding hole 221, the diameter of the inner cavity of the welding piece 222 can be changed, and pressure can be applied to the connecting end of the pipe from outside to inside, so that the connecting end of the pipe is welded; the extrusion assembly 23 includes a pressing member 231, the pressing member 231 is disposed on the extrusion member 122, the pressing member 231 applies pressure to the extrusion member 122, so that the extrusion member 122 extrudes gas in the conduit toward the middle, and a force for driving the extrusion member 122 to extrude the conduit toward the middle can be applied to the extrusion member 122 by the pressing member 231, so that the extrusion member 122 extrudes gas in the conduit, and further the air pressure of the connecting end of the conduit is continuously increased, and the conduit is pressurized from inside to outside under the action of the air pressure, so that the pressure applied to the conduit by the welding member 222 is matched, the connecting end of the conduit is welded, and the welding is performed in a partially overlapped manner, so that the tensile strength of the welding part is further enhanced.

Preferably, the extrusion 122 is in a roller shape, so that the extrusion 122 can drive the extrusion 122 to roll when being subjected to inward pressure and gradually extrude the conduit to the connecting end, thereby ensuring that the conduit is not deformed due to sliding friction when being extruded.

In order to ensure that the catheter does not move due to extrusion when being welded, other fixing devices can be arranged to further fix the catheter, such as negative pressure adsorption or buckle fixing.

Preferably, one end of the welding hole 221 is a circular-table-shaped circular hole, and the aperture is gradually reduced from outside to inside, so that when the welding ends of the two guide pipes are butted through the heating piece 211, one guide pipe can extend into the other inner cavity under the guiding action of the welding hole 221, and the inner wall and the outer wall of the one guide pipe are contacted, so that the welding efficiency is enhanced, extrusion between philosophy is avoided, and deformation is caused.

Preferably, the weld 222 is internally provided with spaced apart metal sheets so that pressure is uniformly applied to the catheter by the metal sheets as the inner diameter thereof is gradually reduced.

Referring back to fig. 4, the welding member 222 is an air bag, and the injection or removal of the gas changes the pressure of the welding member 222 on the conduit, so that when the gas is continuously injected into the welding member 222, the diameter of the inner side of the welding member 222 is continuously reduced under the effect of the continuously increased pressure in the welding member 222, thereby applying the pressure to the conduit from outside to inside.

Referring back to fig. 2-3, the welding assembly 22 further includes a communication hole 223, the communication hole 223 is disposed on the heating element 211, and the communication hole 223 communicates the inflating cavity of the welding element 222 with the gas transmission groove 212, so that when the conduit is welded, the gas transmission groove 212 penetrates through two ends of the heating element 211 and is sealed by the movable element 121, so that gas injected into the gas transmission groove 212 subsequently cannot overflow through the gas transmission groove 212, and the gas can be injected into the welding element 222 through the communication hole 223, so that the diameter of the inner side of the welding element 222 is continuously reduced, and a welding effect is achieved.

Referring to fig. 4 and 6, fig. 6 is another schematic structural view of the heating element according to the embodiment. The welding mechanism 2 further comprises a pressurizing assembly 24, the pressurizing assembly 24 comprises a gas storage cavity 241, a fixing piece 242 and a pressurizing piece 243, the gas storage cavity 241 is arranged on the heating piece 211, the gas storage cavity 241 is communicated with the gas charging cavity of the welding piece 222, so that when gas is injected into the conduit through the gas transmission groove 212, part of the gas flows into the gas storage cavity 241 through the welding piece 222, the fixing piece 242 is arranged on the Chu Qiqiang 241, the fixing piece 242 is positioned on one side of the gas storage cavity 241 far away from the welding hole 221, the fixing piece 242 is made of a magnetic material, the pressurizing piece 243 is arranged on the Chu Qiqiang 241, the pressurizing piece 243 is positioned on one side of the gas storage cavity 241 close to the welding hole 221, the pressurizing piece 243 is made of a soft magnetic material, so that when the gas pressure in the gas storage cavity 241 is continuously increased, the hot gas heated through the heating piece 211, the magnetism of the pressurizing piece 243 is heated to be reduced, and when the temperature reaches a higher temperature, the magnetism disappears, the air pressure in the air storage cavity 241 can push the pressurizing element 243 to move towards the fixing element 242 and finally make the pressurizing element 243 and the fixing element 242 fit, and the magnetic poles of the pressurizing element 243 and the adjacent end of the fixing element 242 are the same, so that when the welding assembly 22 is used for welding the connecting end of the conduit, the hardness of the conduit decreases along with the rising of the temperature of the conduit, if the pressure in the initial state is kept and cannot ensure that enough pressure is applied to the connecting end of the conduit, at the moment, along with the decreasing of the temperature, the magnetism of the pressurizing element 243 made of soft magnetic materials is gradually increased, and under the same effect as the magnetic pole of the contact surface of the pressurizing element 243 and the fixing element 242, the pressurizing element 243 receives the magnetic repulsive force from the fixing element 242, thereby extruding the air in the air storage cavity 241, further enhancing the air pressure in the welding element 222, and further enhancing the pressure of the connecting end of the welding element 222 along with the decreasing of the temperature of the conduit, further guaranteeing the welding quality of the connecting end of the guide pipe.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a movable member in the embodiment. The adjacent ends of the two movable pieces 121 are provided with auxiliary surfaces 1211, the upper ends of the auxiliary surfaces 1211 are inclined surfaces, the lower ends of the auxiliary surfaces 1211 are vertical surfaces, the lower ends of the heating pieces 211 are connected with auxiliary blocks 2111, the lower ends of the auxiliary blocks 2111 are inclined surfaces, and the upper ends of the auxiliary blocks 2111 are vertical surfaces, so that when the heating pieces 211 are driven by a driving device to perform hot melting or welding on a conduit, the two movable pieces 121 can be matched with the auxiliary surfaces 1211 through the auxiliary blocks 2111, and accordingly the two movable pieces 121 can be close to or far from the middle.

Referring to fig. 7, fig. 7 is a schematic structural view of the pressing member in the embodiment. The extrusion assembly 23 further includes an extrusion surface 232, the extrusion surface 232 is disposed on the pressure applying member 231, and the pressure applying member 231 is an inclined surface, and applies a pushing force to the extrusion member 122 moving toward the heating member 211, so that when the pressure applying member 231 applies an inward pushing force to the extrusion member 122, the vertical pushing force can be converted into a transverse pushing force, and the extrusion member 122 is ensured to always generate a downward pressure to the conduit, so that the gas in the conduit can be gradually extruded toward the middle, and the pressure in the conduit can be rapidly increased, and the welding effect can be achieved by matching with the extrusion of the welding member 222.

Referring back to fig. 2 and 3, the pressing assembly 23 further includes a driving member 233 and a buffer member 234, the driving member 233 is connected with the pressing member 231, and the driving member 233 drives the pressing member 231 to apply a pushing force to the pressing member 122, the buffer member 234 is disposed between the driving member 233 and the pressing member 231, and two ends of the buffer member 234 are respectively connected with the driving member 233 and the pressing member 231, so that the driving member 233 and the pressing member 231 can be buffered, the pressing member 231 can be applied with pressure, and then the pressing member 122 can be driven to press the catheter, and the buffer member 234 is disposed to be in transitional connection with the pressing member 231, so that when the pressing member 231 is applied with pressure, the situation that the pressing member 122 moves rapidly to crush the catheter does not exist.

Preferably, the fixing assembly 12 further includes a pressing member 123, the pressing member 123 is located at one end of the movable member 121, and the pressing member 122 is connected to the pressing member 123, and the pressing member 123 is removed or installed to fix or release the guide pipe, so that the guide pipe can be installed or removed, and the pressing member 122 can be released from fixing the guide pipe by moving the pressing member 123 upward.

Preferably, the pressing assembly 23 further includes a guide groove 235, and the guide groove 235 is formed in the pressing member 123 and guides the movement of the pressing member 122 so that the pressing member 122 can move along a path parallel to the guide tube when receiving the pushing force of moving toward the heating member 211, thereby securing the stability of pressing the guide tube.

Referring back to fig. 2-5, the fixed assembly 12 further includes an elastic member 124, where the elastic member 124 is disposed between the movable member 121 and the base assembly 11, and two ends of the elastic member 124 are respectively connected to the movable member 121 and the base assembly 11, and apply a pushing force to the movable member 121 to move toward the heating member 211, so that when the heating member 211 moves to a state that the conduit is not blocked, i.e. one end of the conduit is opposite to the welding hole 221, the conduit can be pushed into the welding hole 221 by the elastic force of the elastic member 124, so that the conduit is butted and welded.

Referring to fig. 8, fig. 8 is a flow chart of a process for targeting a balloon dilation catheter in an embodiment. Filtering developer crystals of different materials, generating extrusion cooking, extruding the developer crystals according to extrusion parameters, early granulating by using extruded grains, extruding a balloon material pipe, forming the balloon, respectively welding the proximal end and the distal end of the balloon, forming the tip of a catheter and welding a wire guide port, and then checking;

simultaneously, injection molding is carried out on the catheter seat and the decompression tube to make the catheter seat and the decompression tube be processed and molded, the catheter seat is adhered to the position of the hypotube, the decompression tube is sleeved, and then the inspection is carried out;

then, carrying out transition welding on the inspected catheter and the catheter seat, enabling the catheter and the catheter seat to pass through 100% positive pressure leakage detection, then carrying out hydrophilic coating treatment, and carrying out inspection;

then the saccule is folded, a protective sleeve and a lining wire are arranged on the saccule, the saccule is leaked by 100% positive pressure, then the saccule is arranged into a coil pipe, a sterilizing bag and a sealing are arranged, and finally, the saccule is sterilized again, thus the whole production process is completed.

firstly, a conduit to be welded is fixed on a movable piece 121 through the extrusion piece 122 and the gland piece 123 in a matching way;

the hot melting assembly 21 is used for carrying out hot melting on the connecting end of the conduit and delivering gas into the conduit, so that the internal pressure of the conduit is greatly increased and swelled;

the welding assembly 22 is used for aligning the connecting end of the catheter, applying pressure inwards to the connecting end of the catheter, and applying pressure to the connecting end of the catheter from inside to outside under the action of the extrusion assembly 23, so that the connecting part of the catheter is extruded;

when the temperature of the connecting end of the conduit gradually decreases, the pressure applied to the connecting end of the conduit is gradually increased under the effect that the pressurizing assembly 24 transmits air into the welding piece 222, so that the hot-melt welding effect is further enhanced, and the conduit welding is completed.

Referring back to fig. 2 and 3, the catheter is fixed in place by the fixing component 12, then the connecting end is heated and hot-melted by the hot-melting component 21, the connecting end of the catheter is overlapped and welded by the welding component 22, the welding effect is enhanced by applying the pressure from outside to inside, then the welding effect of the catheter is further enhanced by applying the pressure from inside to outside to the connecting end of the catheter by the extruding component 23, then the temperature of the connecting end of the catheter is gradually reduced, and when the temperature is reduced, the pressurizing component 24 starts to work, the pressure of the welding part of the catheter is gradually increased along with the temperature reduction, and the welding effect of the catheter is further enhanced.

To sum up: through setting up extrusion subassembly for when carrying out the welding to the sacculus pipe, can be with a pipe link outside and another pipe link inboard connection through welding subassembly, and extrude the pipe to the link through the extrusion piece, the intraductal atmospheric pressure of pipe produces by inside-out pressure to the link, and extrudees the link from outside-in through the weldment, thereby reinforcing hot melt welded welding pressure, and the length of cooperation superimposed mode growth link, and then improve the tensile strength of welding point, thereby ensure the life of sacculus pipe.

The foregoing description is only illustrative of the invention and is not to be construed as limiting the invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present invention, should be included in the scope of the claims of the present invention.

Claims

1. A welding apparatus for a target balloon dilation catheter, comprising

The fixing mechanism (1) comprises a base component (11) and a fixing component (12), wherein the base component (11) is used for bearing; the fixing assembly (12) comprises a movable piece (121) and an extrusion piece (122), the movable piece (121) is arranged on the base assembly (11), the movable piece (121) is used for bearing a catheter to be welded, the number of the movable pieces (121) is two and is arranged oppositely, the extrusion piece (122) is arranged on the movable piece (121), and the extrusion piece (122) is matched with the movable piece (121) to fix the catheter; and

the welding mechanism (2) comprises a hot melting assembly (21), a welding assembly (22) and an extrusion assembly (23), wherein the hot melting assembly (21) comprises a heating element (211) and a gas transmission groove (212), the heating element (211) is arranged on the base assembly (11) and heats the connecting end of the guide pipe, the gas transmission groove (212) is formed in the heating element (211), one end of the heating element (211) is connected with the outside, the other end of the heating element (211) penetrates through the two ends of the heating element (211) and communicates the inner cavity of the connecting end of the guide pipe to be welded, and gas is injected into the guide pipe; the welding assembly (22) comprises a welding hole (221) and a welding piece (222), the welding hole (221) is formed in the heating piece (211), the welding hole (221) is located at one side of the through hole of the gas transmission groove (212), the welding piece (222) is arranged in the welding hole (221), and the welding piece (222) applies pressure inwards to the outer side of the connecting end of the guide pipe; the extrusion assembly (23) comprises a pressing piece (231), the pressing piece (231) is arranged on the extrusion piece (122), and the pressing piece (231) applies pressure to the extrusion piece (122) to enable the extrusion piece (122) to extrude gas in the guide pipe to the middle.

2. The welding apparatus of target balloon dilation catheter of claim 1 wherein the weld (222) is a balloon and injecting or exhausting gas alters the pressure of the weld (222) against the catheter.

3. The welding apparatus of a target balloon dilation catheter according to claim 2 wherein the welding assembly (22) further comprises a communication hole (223), the communication hole (223) is provided in the heating member (211), and the communication hole (223) communicates the inflation cavity of the welding member (222) with the gas delivery groove (212).

4. The welding device of a target balloon dilation catheter according to claim 2, wherein the welding mechanism (2) further comprises a pressurizing assembly (24), the pressurizing assembly (24) comprises a gas storage cavity (241), a fixing piece (242) and a pressurizing piece (243), the gas storage cavity (241) is formed in the heating piece (211) and communicated with the gas charging cavity of the welding piece (222), the fixing piece (242) is arranged in the Chu Qiqiang (241), the fixing piece (242) is arranged on one side, far away from the welding hole (221), of the gas storage cavity (241) and made of a magnetic material, the pressurizing piece (243) is arranged on the Chu Qiqiang (241) and arranged on one side, close to the welding hole (221), of the gas storage cavity (241), the pressurizing piece (243) is made of a soft magnetic material, and the pressurizing piece (243) is identical to the magnetic pole of the adjacent end of the fixing piece (242).

5. The welding apparatus of a target balloon dilation catheter according to any one of claims 1-4, wherein an auxiliary surface (1211) is provided at adjacent ends of two moving members (121), an upper end of the auxiliary surface (1211) is an inclined surface, a lower end is a vertical surface, an auxiliary block (2111) is connected to a lower end of the heating member (211), a lower end of the auxiliary block (2111) is an inclined surface, and an upper end is a vertical surface.

6. The welding apparatus of a target balloon dilation catheter according to claim 1 wherein the pressing assembly (23) further comprises a pressing surface (232), the pressing surface (232) is disposed on a pressing member (231), and the pressing member (231) is a slope and applies a pushing force to the pressing member (122) moving in a direction of the heating member (211).

7. The welding apparatus of a target balloon dilation catheter according to claim 1, wherein the extrusion assembly (23) further comprises a driving member (233) and a buffering member (234), the driving member (233) is connected with the pressing member (231), the driving member (233) drives the pressing member (231) to apply thrust to the extrusion member (122), the buffering member (234) is arranged between the driving member (233) and the pressing member (231), and two ends of the buffering member (234) are respectively connected with the driving member (233) and the pressing member (231) to buffer the driving member (233) and the pressing member (231).

8. The welding apparatus of a target balloon dilation catheter of claim 1 wherein the fixed assembly (12) further comprises a gland member (123), the gland member (123) is located at one end of the moveable member (121), and the extrusion (122) is connected to the gland member (123), and the gland member (123) is removed or installed to secure or release the catheter.

9. The welding apparatus of a target balloon dilation catheter according to claim 1, wherein the fixed assembly (12) further comprises an elastic member (124), the elastic member (124) is disposed between the movable member (121) and the base assembly (11), and two ends of the elastic member (124) are respectively connected with the movable member (121) and the base assembly (11), and a pushing force for moving the movable member (121) in a direction of the heating member (211) is applied.

10. A welding process of a target balloon dilation catheter, comprising

Firstly, a conduit to be welded is fixed on a movable piece (121) in a matched manner through an extrusion piece (122) and a gland piece (123);

the connecting end of the conduit is subjected to hot melting through a hot melting assembly (21), and gas is conveyed into the conduit, so that the pressure in the conduit is greatly increased and swelled;

the welding assembly (22) is used for aligning the connecting end of the catheter, applying pressure inwards to the connecting end of the catheter, and applying pressure to the connecting end of the catheter from inside to outside under the action of the extrusion assembly (23), so that the connecting part of the catheter is extruded;

when the temperature of the connecting end of the conduit gradually decreases, the pressure born by the connecting end of the conduit is gradually enhanced under the action of the gas transmission of the pressurizing assembly (24) into the welding piece (222), the hot-melt welding effect is further enhanced, and the conduit welding is completed.