阅读说明：本技术 一种渐变硬度的多腔管、制作方法、制作装置及内窥镜 (Multi-cavity tube with gradually-changed hardness, manufacturing method and device and endoscope ) 是由 白晓淞 于 2021-09-17 设计创作，主要内容包括：本发明提供了一种渐变硬度的多腔管、制作方法、制作装置及内窥镜,该多腔管包括硬段、过渡段和柔性段,该多腔管一体成型。本发明的有益效果是：本发明的多腔管通过一次性挤出成型,在一根多腔管上制作出不同硬度的各部分,价格低廉,简化了传统工艺焊接、注接或胶接不同硬度的导管制作内窥镜可调弯外鞘管多腔管的方式,工艺简单,易于批量生产；转向导丝可均匀分布在管壁各导丝通道,转向精准,且由于多腔管为一体成型,使多腔管整体性更强,提高了多腔管的安全性和使用寿命。(The invention provides a hardness-gradually-changed multi-cavity tube, a manufacturing method, a manufacturing device and an endoscope. The invention has the beneficial effects that: the multi-cavity tube is formed by one-time extrusion, all parts with different hardness are manufactured on one multi-cavity tube, the price is low, the mode that the multi-cavity tube of the bendable outer sheath tube of the endoscope is manufactured by welding, injecting or gluing catheters with different hardness in the traditional process is simplified, the process is simple, and batch production is easy; the steering guide wires can be uniformly distributed in the guide wire channels of the tube wall, the steering is accurate, and the multi-cavity tube is integrally formed, so that the integrity of the multi-cavity tube is stronger, and the safety and the service life of the multi-cavity tube are improved.)

1. A method of making a multi-lumen tubing (20) of graduated hardness, comprising the steps of:

step 1: adding a high-hardness high polymer material into a conduit extruder (5), controlling the time for adding the high-hardness high polymer material into the conduit extruder (5), and extruding the high-hardness high polymer material through the conduit extruder (5) to form a hard section (6) meeting the length requirement;

step 2: under the condition that the quality of the high polymer material added into the conduit extruder (5) is not changed, reducing the weight of the high polymer material with high hardness added into the conduit extruder (5) to zero, gradually increasing the weight of the high polymer material with low hardness added into the conduit extruder (5) from zero, controlling the time for adding the high polymer material with high hardness and the high polymer material with low hardness into the conduit extruder (5), and extruding a transition section (7) meeting the length requirement through the conduit extruder (5);

and step 3: stopping adding the high-hardness polymer material into the conduit extruder (5), adding the low-hardness polymer material into the conduit extruder (5), controlling the time for adding the low-hardness polymer material into the conduit extruder (5), and extruding the low-hardness polymer material through the conduit extruder (5) to form the flexible section (8) meeting the length requirement.

2. The method of manufacturing according to claim 1, wherein: manufacturing a multi-cavity tube (20) through a manufacturing device, adding the same high-hardness and low-hardness polymer materials into a first feeding hopper (1) and a second feeding hopper (2) respectively, wherein the manufacturing of the multi-cavity tube (20) comprises the following steps:

the step 1: enabling the high-hardness high polymer material in the first feeding hopper (1) to flow into the conduit extruder (5), controlling the time for the high-hardness high polymer material to flow into the conduit extruder (5) from the first feeding hopper (1) through a feeding timing device (4), and extruding the high-hardness high polymer material through the conduit extruder (5) to form a hard section (6) meeting the length requirement;

the step 2: under the condition that the mass of the high polymer material added into the conduit extruder (5) is not changed, the weight of the high polymer material added into the conduit extruder (5) from the first feeding hopper (1) is reduced to zero through the first feeding metering device (31), the low-hardness high polymer material is gradually added into the conduit extruder (5) from zero through the second feeding metering device (2), the time for flowing the high-hardness high polymer material and the low-hardness high polymer material into the conduit extruder (5) from the first feeding hopper (1) and the second feeding hopper (2) is controlled through the feeding timing device (4), and a transition section (7) meeting the length requirement is extruded through the conduit extruder (5);

the step 3: the first feeding hopper (1) is closed, the second feeding hopper (2) works according to the amount, the time for the second feeding hopper (2) to flow the low-hardness high polymer material into the guide pipe extruder (5) is controlled through the feeding timing device (4), and the low-hardness high polymer material is extruded through the guide pipe extruder (5) to form a flexible section (8) meeting the length requirement.

3. The manufacturing device of the multi-cavity tube (20) with gradually changed hardness is characterized by comprising a first feeding hopper (1), a second feeding hopper (2), a first feeding metering device (31), a second feeding metering device (32), a feeding timing device (4) and a catheter extruder (5), wherein the first feeding hopper (1) is communicated with the first feeding metering device (31), the second feeding hopper (2) is communicated with the second feeding metering device (32), one end of the feeding timing device (4) is respectively communicated with the first feeding metering device (31) and the second feeding metering device (32), and the other end of the feeding timing device (4) is connected with the catheter extruder (5); the first feeding hopper (1) is used for bearing high-hardness high polymer materials, and the second feeding hopper (2) is used for bearing low-hardness high polymer materials; the first feeding metering device (31) is used for controlling the weight of the high-hardness polymer material flowing into the conduit extruder (5) from the first feeding hopper (1); the second feeding metering device (32) is used for controlling the weight of the low-hardness high polymer material flowing into the conduit extruder (5) from the second feeding hopper (2); the feeding timing device (4) is used for controlling the time for the first feeding hopper (1) and/or the second feeding hopper (2) to flow into the guide pipe extruder (5) for the high polymer material; the catheter extruder (5) is used for extruding and molding the multi-cavity tube (20) at one time.

4. A multi-lumen tube (20) of graduated hardness, the multi-lumen tube (20) comprising a rigid segment (6), a transition segment (7) and a flexible segment (8), the multi-lumen tube (20) being integrally formed.

5. The multi-lumen tube (20) according to claim 4, wherein: a steering guide wire channel (9) is arranged in the multi-cavity tube (20), and the steering guide wire is positioned in the steering guide wire channel (9).

6. The multi-lumen tube (20) of claim 5, wherein: the steering guide wire channels (9) are multiple, the steering guide wire channels (9) are uniformly distributed in the multi-cavity tube (20), the number of the steering guide wires is the same as that of the steering guide wire channels (9), and each steering guide wire is arranged in the corresponding steering guide wire channel (9).

7. The multi-lumen tube (20) according to claim 5 or 6, wherein: the multi-cavity tube (20) is internally provided with a working channel (10), an imaging channel (11), a water injection and gas injection channel (12) and an optical fiber channel (13).

8. An endoscope comprising the multilumen tubing (20) of claim 7, wherein: comprises a probe (21), a handle (17), a connecting unit (19), a steering control device (15), a working port (14), an imaging port (16) and a water injection or gas injection port (18), a connecting unit (19) is arranged on the handle (17), one end of the multi-cavity tube (20) is connected with the connecting unit (19), the working port (14) communicating with the working channel (10), the imaging port (16) communicating with the imaging channel (11), the water or gas injection port (18) is communicated with the water or gas injection channel (12), the probe (21) is positioned in the imaging channel (11), the steering control device (15) is arranged on the handle (17), one end of the steering guide wire is connected with the front end of the flexible section (8), and the other end of the steering guide wire is connected with the steering control device (15).

Technical Field

The invention relates to the technical field of medical instruments, in particular to a multi-cavity tube with gradually-changed hardness, a manufacturing method and a manufacturing device thereof and an endoscope.

Background

An endoscope is a commonly used medical instrument that enters the body through a natural orifice or a small incision made by surgery. When in use, the bendable outer sheath of the endoscope is guided into the organ to be examined, and the change of the relevant part can be directly observed. The conventional bendable endoscope outer sheath tube inner multi-cavity tube is generally assembled by a multi-unit welding or gluing mode for a hard section, a transition section and a flexible tube section, is difficult to assemble, needs to be assembled by various special tools, is high in manufacturing cost and low in finished product yield, is easy to break and deform in the use process of a final product, and is not accurate enough in angle control. Meanwhile, the steering guide wire and other unit sections are easy to loosen due to dislocation, so that the steering angle is distorted.

Disclosure of Invention

The invention provides a method for manufacturing a multi-cavity tube with gradually changed hardness, which comprises the following steps:

step 1: adding a high-hardness high polymer material into a guide pipe extruder, controlling the time for adding the high-hardness high polymer material into the guide pipe extruder, and extruding the high-hardness high polymer material through the guide pipe extruder to form a hard section meeting the length requirement;

step 2: under the condition that the quality of the high polymer material added into the conduit extruder is not changed, reducing the weight of the high polymer material with high hardness added into the conduit extruder to zero, gradually adding the high polymer material with low hardness into the conduit extruder from zero, controlling the time for adding the high polymer material with high hardness and the high polymer material with low hardness into the conduit extruder, and extruding a transition section meeting the length requirement through the conduit extruder;

and step 3: and stopping adding the high-hardness polymer material into the guide pipe extruder, adding the low-hardness polymer material into the guide pipe extruder, controlling the time for adding the low-hardness polymer material into the guide pipe extruder, and extruding the low-hardness polymer material through the guide pipe extruder to form a flexible section meeting the length requirement.

As a further improvement of the invention, a multi-cavity tube is manufactured by a manufacturing device, the same high-hardness and low-hardness polymer materials are respectively added into a first feeding hopper and a second feeding hopper, and the manufacturing of the multi-cavity tube comprises the following steps:

the step 1: enabling the high-hardness high polymer material in the first feeding hopper to flow into the conduit extruder, controlling the time for the high-hardness high polymer material to flow into the conduit extruder by the first feeding hopper through the feeding timing device, and extruding the high-hardness high polymer material by the conduit extruder to form a hard section meeting the length requirement;

the step 2: under the condition that the quality of the high polymer material added into the conduit extruder is not changed, the weight of the high polymer material added into the conduit extruder from the first feeding hopper is reduced to zero through the first feeding metering device, the low-hardness high polymer material is added into the conduit extruder from the second feeding hopper through the second feeding metering device, the time for the high-hardness high polymer material and the low-hardness high polymer material to flow into the conduit extruder from the first feeding hopper and the second feeding hopper is controlled through the feeding timing device, and a transition section meeting the length requirement is extruded through the conduit extruder;

the step 3: the first feeding hopper is closed, the second feeding hopper works according to the amount, the time for the second feeding hopper to flow the low-hardness high polymer material into the guide pipe extruder is controlled through the feeding timing device, and the low-hardness high polymer material is extruded through the guide pipe extruder to form a flexible section meeting the length requirement.

The invention also provides a manufacturing device of the multi-cavity tube with gradually-changed hardness, which comprises a first feeding hopper, a second feeding hopper, a first feeding metering device, a second feeding metering device, a feeding timing device and a catheter extruder, wherein the first feeding hopper is communicated with the first feeding metering device, the second feeding hopper is communicated with the second feeding metering device, one end of the feeding timing device is respectively communicated with the first feeding metering device and the second feeding metering device, and the other end of the feeding timing device is connected with the catheter extruder; the first feeding hopper is used for bearing high-hardness high polymer materials, and the second feeding hopper is used for bearing low-hardness high polymer materials; the first feeding metering device is used for controlling the weight of the high-hardness polymer material flowing into the conduit extruder from the first feeding hopper; the second feeding metering device is used for controlling the weight of the low-hardness high polymer material flowing into the conduit extruder from the second feeding hopper; the feeding timing device is used for controlling the time for the first feeding hopper and/or the second feeding hopper to flow the high polymer material into the guide pipe extruder; the catheter extruder is used for extruding and molding the multi-cavity tube at one time.

The multi-lumen tube of the present invention comprises a rigid segment, a transition segment, and a flexible segment, the multi-lumen tube being integrally formed.

As a further improvement of the invention, a steering guide wire channel is arranged in the multi-cavity tube, and a steering guide wire is positioned in the steering guide wire channel.

As a further improvement of the invention, the number of the steering guide wire channels is multiple, the steering guide wire channels are uniformly distributed in the multilumen tube, the number of the steering guide wires is the same as that of the steering guide wire channels, and each steering guide wire is arranged in the corresponding steering guide wire channel.

As a further improvement of the invention, a working channel, an imaging channel, a water injection channel, a gas injection channel and a fiber channel are arranged in the multi-cavity tube.

The invention also provides an endoscope comprising the multi-cavity tube, which comprises a probe, a handle, a connecting unit, a steering control device, a working port, an imaging port and a water injection or gas injection port, wherein the connecting unit is arranged on the handle, one end of the multi-cavity tube is connected with the connecting unit, the working port is communicated with the working channel, the imaging port is communicated with the imaging channel, the water injection or gas injection port is communicated with the water injection or gas injection channel, the probe is positioned in the imaging channel, the steering control device is arranged on the handle, one end of the steering guide wire is connected with the front end of the flexible section, and the other end of the steering guide wire is connected with the steering control device.

The invention has the beneficial effects that: the multi-cavity tube is formed by one-time extrusion, all parts with different hardness are manufactured on one multi-cavity tube, the price is low, the mode that the multi-cavity tube of the bendable outer sheath tube of the endoscope is manufactured by welding, injecting or gluing catheters with different hardness in the traditional process is simplified, the process is simple, and batch production is easy; the steering guide wires can be uniformly distributed in the guide wire channels of the tube wall, the steering is accurate, and the multi-cavity tube is integrally formed, so that the integrity of the multi-cavity tube is stronger, and the safety and the service life of the multi-cavity tube are improved.

Drawings

FIG. 1 is a schematic diagram of a fabrication apparatus;

FIG. 2 is a schematic view of a multi-lumen tube configuration;

FIG. 3 is a schematic view of the endoscope;

FIG. 4 is a cross-sectional view of a multi-lumen tube.

Detailed Description

The invention discloses a method for manufacturing a multi-cavity tube 20 with gradually changed hardness, which comprises the following steps:

step 1: adding a high-hardness high polymer material into a guide pipe extruder 5, controlling the time for adding the high-hardness high polymer material into the guide pipe extruder 5, and extruding the high-hardness high polymer material through the guide pipe extruder 5 to form a hard section 6 meeting the length requirement;

step 2: under the condition that the quality of the high polymer material added into the conduit extruder 5 is not changed, the weight of the high polymer material with high hardness added into the conduit extruder 5 is reduced to zero, the high polymer material with low hardness added into the conduit extruder 5 is gradually increased from zero, the time for adding the high polymer material with high hardness and the high polymer material with low hardness into the conduit extruder 5 is controlled, and a transition section 7 meeting the length requirement is extruded by the conduit extruder 5;

and step 3: stopping adding the high-hardness polymer material into the conduit extruder 5, adding the low-hardness polymer material into the conduit extruder 5, controlling the time for adding the low-hardness polymer material into the conduit extruder 5, and extruding the low-hardness polymer material through the conduit extruder 5 to form the flexible section 8 meeting the length requirement.

In a preferred embodiment of the present invention, a multi-lumen tube 20 is manufactured by a manufacturing apparatus, and polymer materials with high hardness and low hardness are respectively added into a first hopper 1 and a second hopper 2, wherein the manufacturing of the multi-lumen tube 20 comprises the following steps:

the step 1: making the high-hardness polymer material in the first feeding hopper 1 flow into the conduit extruder 5, controlling the time for the first feeding hopper 1 to flow the high-hardness polymer material into the conduit extruder 5 through the feeding timing device 4, and extruding the high-hardness polymer material through the conduit extruder 5 to form a hard section 6 meeting the length requirement;

the step 2: under the condition that the quality of the high polymer material added into the conduit extruder 5 is not changed, the weight of the high polymer material added into the conduit extruder 5 from the first feeding hopper 1 is reduced to zero through the first feeding metering device 31, the low-hardness high polymer material is added into the conduit extruder 5 from the second feeding hopper 2 through the second feeding metering device 32, the time for the high-hardness high polymer material and the low-hardness high polymer material to flow into the conduit extruder 5 from the first feeding hopper 1 and the second feeding hopper 2 is controlled through the feeding timing device 4, and the transition section 7 meeting the length requirement is extruded through the conduit extruder 5;

the step 3: the first feeding hopper 1 is closed, the second feeding hopper 2 works according to the amount, the time for the second feeding hopper 2 to flow the low-hardness high polymer material into the guide pipe extruder (5) is controlled through the feeding timing device 4, and the low-hardness high polymer material is extruded through the guide pipe extruder 5 to form the flexible section 8 meeting the length requirement.

As shown in fig. 1, the present invention further discloses a device for manufacturing a multi-cavity tube 20, which comprises a first feeding hopper 1, a second feeding hopper 2, a first feeding metering device 31, a second feeding metering device 32, a feeding timing device 4 and a conduit extruder 5, wherein the first feeding hopper 1 is communicated with the first feeding metering device 31, the second feeding hopper 2 is communicated with the second feeding metering device 32, one end of the feeding timing device 4 is respectively communicated with the first feeding metering device 31 and the second feeding metering device 32, and the other end of the feeding timing device 4 is connected with the conduit extruder 5; the first feeding hopper 1 is used for bearing high-hardness polymer materials, and the second feeding hopper 2 is used for bearing low-hardness polymer materials; the first feeding metering device 31 is used for controlling the weight of the high-hardness polymer material flowing into the pipe extruder 5 from the first feeding hopper 1; the second feeding metering device 32 is used for controlling the weight of the low-hardness high polymer material flowing into the pipe extruder 5 from the second feeding hopper 2; the feeding timing device 4 is used for controlling the time for the first feeding hopper 1 and/or the second feeding hopper 2 to flow the high polymer material into the guide pipe extruder 5; the catheter extruder 5 is used to extrude the multi-lumen tube 20 in one step.

As shown in fig. 2 and 4, the multi-lumen tube 20 of the present invention comprises a rigid segment 6, a transition segment 7, and a flexible segment 8, the multi-lumen tube 20 being integrally formed.

The hard section 6, the transition section 7 and the flexible section 8 are realized by controlling and adding the same type of high polymer materials with different hardness by adopting a first feeding metering device 31 and a second feeding metering device 32.

Hard section 6, changeover portion 7 and flexible section 8 are through the reinforced total amount of measurement unchangeable, and different weight is added to pipe extruder 5 to first loading hopper 1 and second loading hopper 2, control hardness degree of change.

The length of the hard section 6, the transition section 7 and the flexible section 8 is controlled by controlling the time for the first feeding hopper 1 and/or the second feeding hopper 2 to flow the high polymer material into the guide pipe extruder 5 through the feeding timing device 4, so that the product requirement is met.

The high-hardness and low-hardness polymer materials can be selected from different hardness grades such as polyurethane, Polyamide (PEBAX) and the like, and are selected according to the use requirements of the multi-cavity tube.

A steering guide wire channel 9 is arranged in the multi-lumen tube 20, and a steering guide wire is positioned in the steering guide wire channel 9.

The steering guide wire channels 9 are multiple, the steering guide wire channels 9 are uniformly distributed in the multi-cavity tube 20, the number of the steering guide wires is the same as that of the steering guide wire channels 9, and each steering guide wire is arranged in the corresponding steering guide wire channel 9.

The multi-lumen tube 20 is provided with a working channel 10, an imaging channel 11, a water and gas injection channel 12, and a fiber channel 13.

As shown in fig. 3, the present invention further discloses an endoscope comprising a multi-lumen tube 20, which comprises a probe 21, a handle 17, a connecting unit 19, a steering control device 15, a working port 14, an imaging port 16, and a water or gas injection port 18, wherein the connecting unit 19 is disposed on the handle 17, one end of the multi-lumen tube 20 is connected to the connecting unit 19, the working port 14 is communicated with the working channel 10, the imaging port 16 is communicated with the imaging channel 11, the water or gas injection port 18 is communicated with the water or gas injection channel 12, the probe 21 is located in the imaging channel 11, the steering control device 15 is mounted on the handle 17, one end of the steering guide wire is connected to the front end of the flexible segment 8, and the other end of the steering guide wire is connected to the steering control device 15.

The multi-cavity tube is formed by one-time extrusion, all parts with different hardness are manufactured on one multi-cavity tube, the price is low, the mode that the multi-cavity tube of the bendable outer sheath tube of the endoscope is manufactured by welding, injecting or gluing catheters with different hardness in the traditional process is simplified, the process is simple, and batch production is easy; the steering guide wires can be uniformly distributed in the guide wire channels of the tube wall, the steering is accurate, and the multi-cavity tube is integrally formed, so that the integrity of the multi-cavity tube is stronger, and the safety and the service life of the multi-cavity tube are improved.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.