CN117444494A

CN117444494A - Catheter welding machine

Info

Publication number: CN117444494A
Application number: CN202311787711.3A
Authority: CN
Inventors: 黄牧云; 付学森; 付钰锟
Original assignee: Shenzhen Maipuqi Medical Technology Co ltd
Current assignee: Shenzhen Maipuqi Medical Technology Co ltd
Priority date: 2023-12-25
Filing date: 2023-12-25
Publication date: 2024-01-26

Abstract

The present invention provides a catheter welding machine comprising: a movable limiting device and a hot air device; one side of the limiting device is used for placing the first guide pipe, and the other side of the limiting device is used for placing the second guide pipe so as to enable the end face to be welded of the first guide pipe to be in fit alignment with the end face to be welded of the second guide pipe; at least two air outlets are arranged on the hot air device, and all the air outlets face the end face to be welded of the first guide pipe and the end face to be welded of the second guide pipe; and the first guide pipe and the second guide pipe are welded into a whole through the hot air of all the air outlets. The hot air device provided with at least two air outlets can uniformly cover the guide pipe from at least two directions and uniformly heat the guide pipe, thereby being convenient for improving welding quality, reducing deformation, improving production efficiency and reducing production cost.

Description

Catheter welding machine

Technical Field

The invention relates to the technical field of medical instrument processing, in particular to a catheter welding machine.

Background

Medical catheters are a special type of catheter used in the medical field for guiding liquids, gases or other substances into or out of the patient's body during diagnostic, therapeutic and monitoring procedures. Catheters are often required to be composed of multiple parts, such as hypotubes, transition tubes, inner lumen tubes, distal tubes, and the like; however, due to the need for tightness, welding is required to form a multi-segment catheter into a single catheter.

The quality of the welding quality of the conduit is an important condition for influencing whether the conduit can be normally used, and common conduit welding modes mainly comprise laser welding and hot air welding; among them, laser welding is expensive although heat radiation is small, and welding efficiency is relatively low.

At present, hot air welding is a common and relatively low-cost conduit welding mode, but the conduit welding cannot achieve the expected effect due to uneven heating or difficult alignment of conduit welding parts, so that the normal use of the conduit is affected.

Thus, there is a need for a solution to the above-mentioned problems.

Disclosure of Invention

Aiming at the problem that the expected effect of the conduit cannot be achieved by hot air welding in the prior art, the invention provides the conduit welding machine so as to achieve a better conduit welding effect.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a catheter welding machine, comprising: a movable limiting device and a hot air device;

one side of the limiting device is used for placing a first guide pipe, and the other side of the limiting device is used for placing a second guide pipe so as to enable the end face to be welded of the first guide pipe to be in joint alignment with the end face to be welded of the second guide pipe;

at least two air outlets are arranged on the hot air device, and all the air outlets face the end face to be welded of the first guide pipe and the end face to be welded of the second guide pipe; and welding the first guide pipe and the second guide pipe into a whole through all hot air of the air outlets.

In a specific embodiment, the hot air device comprises a hot air generating device and a hot air guiding device;

the hot air guide device is provided with an air duct and at least one flow dividing sheet;

the splitter blades are positioned on the air channels to form at least two stages of air channels, and the air channels are narrowed step by step; the air channels of all stages are communicated with each other and all the air outlets.

In one specific embodiment, one side of the hot air guiding device, which is close to the first guide pipe and the second guide pipe, is provided with an arc welding surface,

all the air outlets uniformly encircle along the circumferences of the first guide pipe and the second guide pipe, are arranged on the welding surface, and have the same circumferential angle between the adjacent air outlets.

In one embodiment, the hot air guiding device has a thickness direction, a height direction and a width direction which are mutually orthogonal,

the thickness direction is defined as the extending direction of the first conduit and the second conduit, and the height direction is defined as the direction in which the welding surface is close to or far from the end surface to be welded of the first conduit and the end surface to be welded of the second conduit; the section taken along the height direction and the width direction is defined as a vertical section;

and seen from the vertical section of the hot air guiding device, all extension lines of the air outlets are intersected at the geometric center of the welding surface.

In a specific embodiment, the splitter blade comprises a first splitter blade, a second splitter blade and a third splitter blade, wherein the second splitter blade and the third splitter blade are symmetrically arranged;

the air channels of at least two stages comprise a main air channel, a sub air channel and a secondary sub air channel; a first shunt port is formed at the joint of the main air duct and the sub air duct; the junction of the sub-air duct and the secondary sub-air duct respectively forms a second split-flow port and a third split-flow port;

the first splitter vane is positioned at the front side of the first splitting port, the second splitter vane is positioned at the front side of the second splitting port, and the third splitter vane is positioned at the front side of the third splitting port;

the first splitter plate is arranged in a dislocation manner with the second splitter plate and the third splitter plate respectively;

the extending directions of the first flow dividing sheets, the second flow dividing sheets and the third flow dividing sheets are the flowing directions of hot air in the hot air flow guiding device;

the first flow dividing piece is symmetrically provided with a first flow dividing part and a second flow dividing part, the second flow dividing piece is symmetrically provided with a third flow dividing part and a fourth flow dividing part, and the third flow dividing piece is symmetrically provided with a fifth flow dividing part and a sixth flow dividing part;

the first and third shunt portions at least partially overlap as viewed in the direction of extension of the second shunt opening centerline, and the second and fifth shunt portions at least partially overlap as viewed in the direction of extension of the third shunt opening centerline.

In a specific embodiment, the first splitter plate is also symmetrically provided with a first flow guiding part and a second flow guiding part, and the hot air guiding device is also symmetrically provided with a third flow guiding part and a fourth flow guiding part;

the third diversion part is arranged between the first diversion part and the first diversion part; the fifth diversion part is arranged between the second diversion part and the second diversion part;

the third diversion part and the first diversion part are separated to form a first air outlet; the fifth diversion part and the second diversion part are separated to form a second air outlet; the sixth diversion part and the fourth diversion part are separated to form a third air outlet; the fourth diversion part and the third diversion part are separated to form a fourth air outlet;

the first air outlet and the third air outlet are oppositely arranged, and the first air outlet and the third air outlet are positioned on the same straight line; the second air outlet and the fourth air outlet are oppositely arranged, and the second air outlet and the fourth air outlet are positioned on the same straight line.

In a specific embodiment, the limiting device for limiting the first conduit and the second conduit comprises: the first limiting part and the second limiting part;

the first limiting part and the second limiting part are respectively provided with a limiting tooth slot correspondingly;

the shape of the limiting tooth groove comprises a V shape, and the opening included angle of the limiting tooth groove is between 30 degrees and 40 degrees.

In one embodiment, a mandrel is further provided to support the first conduit and the second conduit,

the first guide pipe and the second guide pipe are sleeved on the core rod; one end of the core rod is erected on one side of the limiting device, and the other end of the core rod is erected on the other side of the limiting device;

the outer surface of the core rod is provided with an anti-adhesion coating and/or a high-temperature-resistant coating.

In a specific embodiment, a positioning assembly is also provided;

the positioning assembly includes: the positioning block is arranged at one end of the core rod, and the positioning groove is arranged on the limiting tooth groove; the positioning block is matched with the positioning groove.

In a specific embodiment, the device is further provided with a lifting platform, a first driving device, a second driving device and a detection device;

the hot air device is arranged on the lifting platform;

the first driving device is connected with the limiting device, and the second driving device is connected with the lifting platform;

when the detection device detects that the first guide pipe and the second guide pipe are placed on the limiting device, the first driving device is started to drive the limiting device to move towards the hot air guiding device; and starting the second driving device to drive the lifting platform to move towards the limiting device.

The beneficial effects are that:

the hot air device with at least two air outlets can uniformly heat the guide pipe to be welded from at least two directions, thereby being convenient for improving welding quality, reducing deformation, improving production efficiency and reducing production cost; be provided with stop device and be used for setting up the pipe, be convenient for aim at the welding position of pipe, and stop device is last be provided with the spacing tooth's socket of mutually supporting with the plug that supports the pipe, can reduce the emergence of pipe thermal collapse phenomenon in the welding process, help promoting the welding quality of pipe, still be provided with the locating component that comprises locating piece and constant head tank, further restrict the position of waiting to weld the pipe, promote the accuracy of welding position.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a diagram showing an internal structure of a catheter welding machine according to an embodiment of the present invention;

FIG. 2 is a front view of a catheter welding machine according to an embodiment of the present invention;

FIG. 3 is a side view of a catheter welding machine according to an embodiment of the present invention;

FIG. 4 is a diagram showing the whole structure of a catheter welding machine according to an embodiment of the present invention;

FIG. 5 is a perspective view of a hot air guiding device according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating an internal structure of a hot air guiding device according to an embodiment of the present invention;

FIG. 7 is a perspective view showing the internal structure of a hot air guiding device according to an embodiment of the present invention;

FIG. 8 is a schematic vertical cross-section of a hot air guiding device according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a first relationship between a hot air guiding device and a duct during welding according to an embodiment of the present invention;

FIG. 10 is a second schematic diagram of the position relationship between the hot air guiding device and the duct during welding according to the embodiment of the present invention;

FIG. 11 is a schematic view illustrating the direction of the flow of hot air in the hot air guiding device according to the embodiment of the present invention;

FIG. 12 is a schematic diagram of a mandrel in accordance with an embodiment of the present invention;

FIG. 13 is an assembly view of a first guide tube, a second guide tube and a mandrel according to an embodiment of the present invention;

FIG. 14 is an enlarged detail view of a stop device according to an embodiment of the present invention;

FIG. 15 is a block diagram of a stop device according to an embodiment of the present invention;

fig. 16 is an assembly view of a mandrel and a limiting device according to an embodiment of the present invention.

Reference numerals:

1-a limiting device; 11-a first limit part; 12-a second limiting part; 13-a first conduit; 14-a second conduit; 134-end faces to be welded; 101-limiting teeth; 102-limiting tooth sockets; 2-lifting platform; 3-a hot air device; 31-a hot air generating device; 32-a hot air guiding device; 4-core rod; 5-positioning assembly; 51-positioning blocks; 52-positioning grooves; 6, an air duct; 61-a main air duct; 62-a sub-air duct; 63-a secondary sub-stack; 7-a splitter blade; 71-a first splitter; 72-a second splitter; 73-a third diverter blade; 701-a first split; 702-a second split; 703-a third split; 704-a fourth split; 705-a fifth split; 706-a sixth split; 711-a first flow guide; 712-a second flow guide; 713-a third deflector; 714-fourth flow guide; 81-a first shunt port; 82-a second split; 83-a third shunt port; 84-an air outlet; 801-a first air outlet; 802-a second air outlet; 803-a third air outlet; 804-a fourth air outlet; 9-welding face.

Detailed Description

Hereinafter, various embodiments of the present disclosure will be more fully described. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the various embodiments of the disclosure to the specific embodiments disclosed herein, but rather the disclosure is to be interpreted to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.

Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present disclosure indicate the presence of the disclosed functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present disclosure, the terms "comprises," "comprising," and their cognate terms are intended to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

In various embodiments of the present disclosure, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B or may include both a and B.

Expressions (such as "first", "second", etc.) used in the various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.

It should be noted that: if it is described to "connect" one component element to another component element, a first component element may be directly connected to a second component element, and a third component element may be "connected" between the first and second component elements. Conversely, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.

The term "user" as used in various embodiments of the present disclosure may indicate a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

The terminology used in the various embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the disclosure. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of this disclosure belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in the various embodiments of the disclosure.

Examples

An embodiment of the present invention provides a catheter welding machine, as shown in fig. 1 to 4, including: a movable limiting device 1 and a hot air device 3;

as shown in fig. 15, one side of the limiting device 1 is used for placing the first guide pipe 13, and the other side of the limiting device 1 is used for placing the second guide pipe 14 so as to align the end face 134 to be welded of the first guide pipe 13 with the end face 134 to be welded of the second guide pipe 14 in a fitting way;

as shown in fig. 7, 9 and 10, at least two air outlets 84 are provided on the hot air device 3, and different air outlets 84 are located at different positions, and face to-be-welded end surfaces 134 of the first duct 13 and to-be-welded end surfaces 134 of the second duct 14 from different angles; the dashed line in fig. 10 is the direction of the air outlet 84, and the first duct 13 and the second duct 14 are welded together by passing through all hot air of the air outlet 84.

The air outlets 84 include two, three, or more than three;

further, as shown in fig. 3, the hot air device 3 includes a hot air generating device 31 and a hot air guiding device 32;

specifically, in this embodiment, the hot air guiding device 32 is assembled by two mutually symmetrical structures, and is provided with positioning holes, and the positioning and installation of the hot air guiding device 32 are completed by inserting pins through the positioning holes.

The hot air generating device 31 is connected with the hot air guiding device 32.

As shown in fig. 6, 7 and 8, the hot air guiding device 32 is provided with an air duct 6 and at least one flow dividing sheet 7;

the splitter 7 is positioned on the air duct 6 to form at least two stages of air ducts 6, and the air ducts 6 are narrowed step by step; the air channels 6 of each stage are communicated with each other and all the air outlets 84.

The air duct 6 may include one, two or more than two;

the air duct 6 may include two stages, three stages, or more than three stages;

specifically, in the embodiment of the present application, one main duct 61, two sub-ducts 62, and four sub-ducts 63 are provided.

Of course, the number of stages and the number of the air ducts 6 are not limited.

Under the combined action of the multi-stage air duct 6 and the splitter 7, the hot air entering the hot air guiding device 32 is effectively split and uniformly blown out from the different air outlets 84.

From the main air duct 61 to the sub air duct 62 and then to the secondary sub air duct 63, the width of each stage of air duct 6 is gradually narrowed, and the flow is gradually reduced, so that the hot air is uniformly split, the whole welding area is uniformly covered, and the welding quality and the welding efficiency are improved.

Through the design of the air duct 6, the air duct 6 is gradually reduced, which is helpful for more precisely controlling the flow speed, the flow direction and the distribution area of the hot air; the welding precision and controllability of the welding machine are improved, and a more refined welding process is realized.

Further, as shown in fig. 9, one side of the hot air guiding device 32 close to the first conduit 13 and the second conduit 14 is provided with an arc welding surface 9,

as shown in fig. 10, all the air outlets 84 are uniformly surrounded along the circumferential directions of the first duct 13 and the second duct 14, and are arranged on the welding surface 9, and the circumferential angles between the adjacent air outlets 84 are the same.

Specifically, in some embodiments of the present application, the arc-shaped welding surface 9 is C-shaped, and four air outlets 84 are provided, and adjacent air outlets 84 are arranged at 90 degrees intervals;

it can be appreciated that if five air outlets 84 are provided, adjacent air outlets 84 are disposed at 72 degrees apart; if six air outlets 84 are provided, the adjacent air outlets 84 are arranged at 60 degrees; and so on.

All the air outlets 84 are uniformly and circumferentially arranged along the first duct 13 and the second duct 14, so that the hot air sprayed from the air outlets 84 uniformly covers the ducts, and the hot air actions on all the surfaces of the ducts are similar or identical, thereby improving the welding efficiency and ensuring that the welding effect of all the surfaces of the welding end of the ducts is consistent.

Further, as shown in fig. 6 to 11, the hot air guiding device 32 has a thickness direction, a height direction and a width direction orthogonal to each other,

in the figure, the Y-axis direction is the height direction, the X-axis direction is the width direction, and the Z-axis direction is the thickness direction;

the thickness direction is defined as the extending direction of the first conduit 13 and the second conduit 14, and the height direction is defined as the direction of the end face 134 to be welded of the first conduit 13 and the end face 134 to be welded of the second conduit 14, which are close to or far from the welding face 9; the section taken in the height direction and the width direction is defined as a vertical section;

as shown in fig. 8, the dashed lines with arrows are extension lines of the air outlets 84, and all the extension lines of the air outlets 84 meet at the geometric center of the welding surface 9 when viewed in the vertical section of the hot air guiding device 32.

In practical effect, the hot air guiding device 32 distributes and concentrates the hot air, and the dispersion current splits the entered hot air, so that the hot air can uniformly and fully cover the areas where the first duct 13 and the second duct 14 are located; the welding process is more stable and efficient; the uniform hot air coverage can reduce the thermal stress concentration of the guide pipe in the welding process, thereby being beneficial to reducing the risk of welding deformation and improving the welding precision of the guide pipe;

the extending lines of all the air outlets 84 are concentrated and are intersected at the geometric center of the welding surface 9, and when in welding, the axes of the first guide pipe 13 and the second guide pipe 14 are positioned in the geometric center area of the welding surface 9, so that the concentrated coverage of hot air can improve the welding efficiency and the welding speed.

Further, as shown in fig. 6 and 7, the splitter 7 includes a first splitter 71, a second splitter 72, and a third splitter 73, and the second splitter 72 and the third splitter 73 are symmetrically disposed;

the air duct 6 includes a main air duct 61, a sub air duct 62, and a secondary sub air duct 63; the junction of the main duct 61 and the sub duct 62 forms a first split-flow port 81; the junction of the sub-air duct 62 and the secondary sub-air duct 63 forms a second split-flow port 82 and a third split-flow port 83 respectively;

the first splitter vane 71 is positioned in front of the first splitter aperture 81, the second splitter vane 72 is positioned in front of the second splitter aperture 82, and the third splitter vane 73 is positioned in front of the third splitter aperture 83;

as shown in fig. 11, the arrow direction in the drawing is the general flow direction of the hot air, and the extending directions of the first, second, and third split blades 71, 72, 73 are the flow direction of the hot air;

the second flow dividing piece 72 and the first flow dividing piece 71 are arranged in a staggered manner, and the third flow dividing piece 73 and the first flow dividing piece 71 are arranged in a staggered manner;

the first splitter 71 is symmetrically provided with a first splitter 701 and a second splitter 702, the second splitter 72 is symmetrically provided with a third splitter 703 and a fourth splitter 704, and the third splitter 73 is symmetrically provided with a fifth splitter 705 and a sixth splitter 706;

the first diverting portion 701 at least partially overlaps the third diverting portion 703 as viewed in the extending direction of the line of the second diverting port 82, and the second diverting portion 702 at least partially overlaps the fifth diverting portion 705 as viewed in the extending direction of the line of the third diverting port 83; specifically, in some embodiments of the present application, the direction of extension of the line in the second shunt 82 is: in fig. 6, the direction of the X-axis is toward the second splitter 72, and the line of the third split 83 extends in the following direction: in the X-axis direction in fig. 6, the direction toward the third split piece 73.

Further, the first diversion sheet 71 is symmetrically provided with a first diversion portion 711 and a second diversion portion 712, and the hot air diversion device 32 is symmetrically provided with a third diversion portion 713 and a fourth diversion portion 714;

the third diversion portion 703 is interposed between the first diversion portion 701 and the first diversion portion 711; the fifth split flow portion 705 is interposed between the second split flow portion 702 and the second flow guiding portion 712;

the third diversion part 703 and the first diversion part 711 are separated to form a first air outlet 801; the fifth diversion portion 705 and the second diversion portion 712 are separated to form a second air outlet 802; the sixth diversion part 706 and the fourth diversion part 714 are separated to form a third air outlet 803; the fourth diversion part 704 and the third diversion part 713 are separated to form a fourth air outlet 804;

the first air outlet 801 and the third air outlet 803 are oppositely arranged, and the first air outlet 801 and the third air outlet 803 are positioned on the same straight line; the second air outlet 802 and the fourth air outlet 804 are oppositely arranged, and the second air outlet 802 and the fourth air outlet 804 are positioned on the same straight line.

During welding, the first air outlet 801 is positioned at the left upper part of the guide pipe, the second air outlet 802 is positioned at the right upper part of the guide pipe, the third air outlet is positioned at the right lower part of the guide pipe, and the fourth air outlet 804 is positioned at the left lower part of the guide pipe; hot air is sprayed from different angles and different directions and is converged at the ends to be welded of the first guide pipe 13 and the second guide pipe 14 to be welded, so that the hot air covers the surfaces of the guide pipes to be welded in an all-around manner, and the guide pipes are heated uniformly.

Of course, the number, position design, and specific orientation of the air outlets 84 are not limited, and only the condition of uniformly heating the pipe to be welded is required.

The hot air uniformly heats the guide pipe from all aspects, so that the temperature distribution of the welding seam is uniform, and the welding quality is improved; solves the problems of unstable weld quality and even poor weld quality caused by local heating or uneven temperature distribution.

The hot air uniformly heats the guide pipe from all aspects, deformation caused by thermal expansion and contraction of the guide pipe in the hot air welding process can be avoided to a certain extent, and the welding position and the welding seam accuracy are ensured.

In addition, the hot air can uniformly heat the guide pipe from various aspects, so that the welding times can be reduced, the welding speed is higher, the production efficiency is improved, and the production cost is reduced.

Further, as shown in fig. 14 to 16, the stopper 1 for stopping the first duct 13 and the second duct 14 includes: a first limit part 11 and a second limit part 12;

the limiting tooth groove 102 is formed by combining at least two limiting teeth 101;

the number and the positions of the teeth and the grooves of the first limiting part 11 are corresponding to those of the second limiting part 12;

the limiting teeth 101 on two sides of the limiting tooth slot 102 play a role in limiting left-right movement of the guide pipe, so that welding is facilitated.

As shown in fig. 2 and 4, at least one hot air guiding device 32 is arranged on the hot air device 3, and the number of the limiting tooth grooves 102 on the limiting device 1 is set to be matched with the number of the hot air guiding devices 32 so as to independently weld at least one group of guide pipes.

The hot air guiding device 32 comprises one, two, three or more than three;

the catheter comprises one group, two groups, three groups or more than three groups.

The first limiting part 11 and the second limiting part 12 are respectively provided with a limiting tooth slot 102 correspondingly; of course, the number of the limiting tooth grooves 102 is not limited, and can be determined according to specific use requirements.

The shape of the spacing slots 102 includes a "V" shape,

the shape of the limiting tooth groove 102 is designed, so that on one hand, the placement of the catheter is facilitated, and the placement state is more stable; the other party is suitable for different conduit sizes and conduit forms so as to meet the welding requirements of various conduit types, and has strong universality and practicability.

The opening included angle of the limiting tooth groove 102 is between 30 degrees and 40 degrees;

the included angle of the opening of the limiting tooth groove 102 is between 30 degrees and 40 degrees, so that the positioning precision and the bearing capacity are high, and the positioning requirement of the welding process can be met conveniently.

Further, as shown in fig. 12 and 13, a mandrel 4 for supporting the first and second pipes 13 and 14 is provided,

the first guide pipe 13 and the second guide pipe 14 are sleeved on the core rod 4; as shown in fig. 14, one end of the mandrel 4 is erected on one side of the limiting device 1, the other end of the mandrel 4 is erected on the other side of the limiting device 1, and the first guide tube 13 and the second guide tube 14 can relatively move and adjust positions on the mandrel 4 so as to better align the end face 134 to be welded of the first guide tube 13 with the end face 134 to be welded of the second guide tube 14 and keep the stability and alignment of the end to be welded.

The core rod 4 plays a role in supporting and fixing the inner cavity of the guide pipe, so that the inner cavity of the guide pipe is kept in an open state during hot air welding, hot air can enter and uniformly heat the end to be welded of the guide pipe, and the end to be welded of the guide pipe is prevented from being closed or deformed.

In the welding process, the end part of the catheter is softened and melted, so that the thermal collapse phenomenon is easy to occur, and the end part of the catheter is sunk or deformed; the core rod 4 is used for supporting, so that the risk of thermal collapse can be effectively reduced, and the stability of a welding area is maintained; the position deviation of the guide pipe caused by heating shrinkage is avoided, and the possibility of influencing the welding effect is reduced.

The core rod 4 can also be used as a heat conduction medium to help transfer heat from hot air to the inside of the guide pipe, so that the softening and melting speed of the end part of the guide pipe to be welded is increased, and the welding is promoted.

The mandrel 4 may be made of a high temperature resistant material; such as stainless steel; of course, the choice of the particular material for the mandrel 4 is not limited.

It will be appreciated that the mandrel 4 should be selected to match the material of the conduit and that after welding is complete, the mandrel 4 should be easily removed from the interior of the conduit without affecting the final product.

The outer surface of the core rod 4 is provided with an anti-adhesion coating and/or a high temperature resistant coating (not shown in the figures).

The anti-adhesion coating and/or the high-temperature resistant coating are arranged on the outer surface of the core rod 4, so that the adhesion of the catheter material on the surface of the core rod 4 can be effectively reduced, the adhesion is difficult, the cleaning difficulty is reduced, and the workload is reduced; the anti-adhesion coating and the high-temperature resistant coating can also ensure the stability of the welding quality of the catheter.

Further, as shown in fig. 16, a positioning assembly 5 is also provided;

the positioning assembly 5 comprises: the positioning block 51 is arranged at one end of the core rod 4, and the positioning groove 52 is arranged on the limiting tooth groove 102; the positioning block 51 is engaged with the positioning groove 52.

Specifically, in some embodiments of the present application, the positioning block 51 is disc-shaped, and the positioning groove 52 is also semi-disc-shaped, so that the positioning block 51 is matched with the positioning groove 52 in shape, and the limiting block is conveniently embedded into the positioning groove 52;

the processing technology of the positioning block 51 with a disc shape is simple, which is beneficial to reducing the production cost and improving the production efficiency;

and the disc-shaped positioning block 51 is convenient to place in the positioning groove 52 relative to the positioning blocks 51 with other shapes, so that the alignment time is shortened, and the use experience is optimized.

Of course, the shapes of the specific positioning block 51 and the positioning groove 52 are not limited, and the positioning function can be realized only by matching the shapes of the positioning block 51 and the positioning groove 52.

The positioning block 51 and the positioning groove 52 form a positioning assembly 5 for positioning the welding position of the guide pipe when the guide pipe to be welded is placed on the limiting device 1;

the positioning component 5 is used for fixing the catheter to be welded at a specific position, so that on one hand, a more accurate welding position can be obtained, and the positioning component also plays a role in limiting the placement position of the catheter in the direction;

on the other hand, the consistency of the welding seam spacing can be maintained so as to ensure the welding quality and the connection reliability;

on the other hand, by using the positioning assembly 5, the welding position can be positioned more quickly and accurately, so that the working efficiency is improved; the welding position adjusting and correcting time is reduced, so that time and energy are saved.

Further, a lifting platform 2, a first driving device, a second driving device and a detecting device are also arranged; the first drive means, the second drive means, the detection means are not shown in the figures,

the hot air device 3 is arranged on the lifting platform 2, specifically, in some embodiments of the application, the limiting device 1 can reciprocate along the horizontal direction, the lifting platform 2 can reciprocate along the vertical direction, and the hot air device 3 is driven to move along the vertical direction;

of course, the specific moving direction of the limiting device 1 and the lifting platform 2 is not limited.

The hot air device 3 is embedded with the limiting device 1 under the drive of the lifting platform 2, so that the first guide pipe 13 and the second guide pipe 14 are welded into one guide pipe through hot air heating.

The first driving device is connected with the limiting device 1, and the second driving device is connected with the lifting platform 2;

when the detection device detects that the first guide pipe 13 and the second guide pipe 14 are placed on the limiting device 1, the first driving device is started to drive the limiting device 1 to move towards the hot air guiding device 32; the second driving device is started to drive the lifting platform 2 to move towards the limiting device 1.

Alternatively, the first driving device and the second driving device may be stepper motors, electric push rods or conveyor belts, or air cylinders or air cylinder motors.

A control module (not shown) is also provided;

the control module is electrically connected with the first driving device, the second driving device and the hot air generating device 31 respectively; for controlling the movement of the limiting device 1 and controlling the start and stop of the hot air generated by the hot air generating device 31.

A duct hot air welder is a device for connecting plastic ducts together; the two conduit ends are heated and fused together using hot air at high temperature to form a strong joint.

In the use process, clean, flat and impurity-free guide pipes are prepared, and the guide pipes to be connected are connected in series through the core rod 4, so that the welding ends of the two guide pipes are aligned; a positioning block 51 on the core rod 4 and a positioning groove 52 arranged on the limiting device 1 are utilized; placing the catheter in the limiting tooth slot 102 of the limiting device 1 to ensure accurate positioning of the catheter; the hot air generating means 31 is then activated to heat it to the desired temperature, the hot air guiding means 32 is moved to the end of the duct by the second driving means, and hot air is blown towards the duct to heat and soften it.

When the conduit is heated and softened, the two conduit ends are lightly pushed together, and hot air is continuously blown into the conduit, so that the two conduit ends are completely fused together. After the ends of the pipes are tightly attached and completely fused, the blowing of hot air into the pipes is stopped, the limiting device 1 is driven by the first driving device to move out of the heating welding range, and a few seconds are waited until the connecting part of the pipes is cooled and solidified. The catheter is then removed from the spacing device 1 and inspected and tested as necessary to ensure a secure connection and complete the weld.

The invention has at least the following technical effects:

the hot air guiding device 32 guides and shunts the entering hot air, so that the to-be-welded guide pipe is heated uniformly, and the technical effects of improving welding quality, reducing deformation, improving production efficiency and reducing production cost can be achieved; the limiting device 1 and the core rod 4 are arranged, so that the to-be-welded end of the to-be-welded guide pipe is aligned, the welding effect is further optimized, and the positioning groove 52 and the positioning block 51 are arranged, so that accurate positioning is assisted, and welding is facilitated; the core rod 4 which supports the catheter to be welded is used, so that the occurrence of the thermal collapse phenomenon of the catheter is reduced.

In summary, the welding machine according to the embodiment of the invention plays an important role in improving the quality of hot air welding of the guide pipe.

Those skilled in the art will appreciate that the drawing is merely a schematic illustration of a preferred implementation scenario and that the modules or flows in the drawing are not necessarily required to practice the invention.

Those skilled in the art will appreciate that modules in an apparatus in an implementation scenario may be distributed in an apparatus in an implementation scenario according to an implementation scenario description, or that corresponding changes may be located in one or more apparatuses different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The above-mentioned inventive sequence numbers are merely for description and do not represent advantages or disadvantages of the implementation scenario.

The foregoing disclosure is merely illustrative of some embodiments of the invention, and the invention is not limited thereto, as modifications may be made by those skilled in the art without departing from the scope of the invention.

Claims

1. Catheter welding machine, its characterized in that includes: a movable limiting device and a hot air device;

2. The catheter welding machine of claim 1 wherein said hot air device comprises a hot air generating device and a hot air guiding device;

3. The pipe welding machine according to claim 2, wherein one side of the hot air guiding device, which is close to the first pipe and the second pipe, is provided with an arc welding surface,

4. The catheter welding machine of claim 3 wherein,

the hot air guiding device is provided with a thickness direction, a height direction and a width direction which are mutually orthogonal,

5. The catheter welding machine of claim 2, wherein the splitter blades comprise a first splitter blade, a second splitter blade, and a third splitter blade, the second splitter blade and the third splitter blade being symmetrically disposed;

6. The pipe welding machine according to claim 5, wherein the first splitter plate is further symmetrically provided with a first flow guiding part and a second flow guiding part, and the hot air guiding device is further symmetrically provided with a third flow guiding part and a fourth flow guiding part;

7. The pipe welding machine of claim 1, wherein the limiting means for limiting the first pipe and the second pipe comprises: the first limiting part and the second limiting part;

8. The pipe welding machine according to claim 7, further comprising a mandrel for supporting the first pipe and the second pipe,

9. The catheter welding machine of claim 8, further comprising a positioning assembly;

10. The catheter welding machine of claim 2, further comprising a lifting platform, a first drive device, a second drive device, and a detection device;

the hot air device is arranged on the lifting platform;