CN112155612B - Forceps channel tube of medical soft endoscope and preparation method - Google Patents
Forceps channel tube of medical soft endoscope and preparation method Download PDFInfo
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- CN112155612B CN112155612B CN202011045679.8A CN202011045679A CN112155612B CN 112155612 B CN112155612 B CN 112155612B CN 202011045679 A CN202011045679 A CN 202011045679A CN 112155612 B CN112155612 B CN 112155612B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 96
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 96
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 45
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 229920001973 fluoroelastomer Polymers 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 238000001574 biopsy Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 8
- 241000894006 Bacteria Species 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 6
- 206010011409 Cross infection Diseases 0.000 abstract description 4
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 241000196240 Characeae Species 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 17
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 description 5
- 241000700605 Viruses Species 0.000 description 4
- 239000000645 desinfectant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000002324 minimally invasive surgery Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002504 lithotomy Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 208000037062 Polyps Diseases 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 210000001198 duodenum Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/04—Endoscopic instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/0034—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means adapted to be inserted through a working channel of an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00526—Methods of manufacturing
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Endoscopes (AREA)
Abstract
The invention relates to a forceps channel tube of a medical soft endoscope and a preparation method thereof, which has the innovation points that: the manufacturing method of the clamp pipe comprises the specific steps of selecting materials, processing the spring groove at one end of the polytetrafluoroethylene hose, processing the spiral spring, combining and assembling the steel wire spiral compression spring and the polytetrafluoroethylene hose into a whole, and adhering the reinforcing section of the clamp pipe spring to prevent each circle of spring from slipping out of the spiral spring groove of the polytetrafluoroethylene hose. The invention has reasonable and simple preparation process, convenient insertion of endoscopic surgical instruments such as biopsy forceps, stonewort taking and the like, high wear resistance of the inner hole wall, long service life, low production cost, convenient cleaning and disinfection, incapability of hiding bacteria in a channel and effective prevention of cross infection.
Description
Technical Field
The invention relates to a forceps channel pipe, in particular to a forceps channel pipe of a medical soft endoscope and a preparation method thereof, and belongs to the technical field of medical appliances.
Background
Forceps catheters for medical flexible endoscopes are an important component of endoscopes in medical devices. It is used to take biopsy sample from human body and to remove foreign matter, polyp, etc. Can be operated freely, and patients are prevented from suffering from unnecessary pain, so the method has positive significance in aspects of diagnosis and treatment of stomach, intestines and duodenum.
The forceps canal pipe of the original medical soft endoscope is structurally characterized in that the forceps canal pipe is made of three layers of thin-wall expanded materials, the inner layer is a high-density expanded PTFE hose, the outer layer is a high-density expanded PTFE winding tape or an expanded PTFE pipe which is wound by a PTFE high-density film tape and is sealed and covered with the inner layer, and the middle layer is an adhesive for bonding and combining the inner layer expanded PTFE hose and the outer layer PTFE film tape into a whole. The main defect is that the texture of the expanded polytetrafluoroethylene foam tube is softer and the surface is rough, and micro small holes are easy to hide bacteria or viruses, so that great difficulty is brought to cleaning and disinfection, or the cleaning and disinfection do not reach the standard, and cross infection is easy to occur; secondly, the strength of the foamed tetrafluoro tube of the forceps channel tube is poor, the foamed tetrafluoro tube is not wear-resistant, the soaked and sterilized or sterilized tetrafluoro foamed tube is not wear-resistant, when the biopsy forceps and the stone-taking basket support surgical instruments are inserted from the forceps channel tube of the endoscope, the inner hole wall surface of the three-layer forceps channel tube is scraped for many times to form a place for storing bacteria and viruses, and the foamed tube cannot be cleaned and sterilized, so that cross infection is easy to occur; some of the forceps channel pipes are punctured into holes when related surgical instruments are inserted, so that the endoscope is seriously damaged and cannot be used, great economic loss is caused, and the maintenance cost is increased; thirdly, the clamp pipe with the structure is required to be added with various production procedures, such as manual gluing and manual winding and coating of the expanded polytetrafluoroethylene belt around the inner pipe, so that various auxiliary materials and high process cost are required to be added, more production personnel are required to be equipped, the labor cost is high, the expanded polytetrafluoroethylene material is softer, more parts are arranged in the inner hole of the insertion part (front end bending part) of the endoscope, and the mutual extrusion condition exists among the parts. Particularly, when the front end bending part is bent again, the extrusion force between parts can be increased, and sometimes the extrusion of the bending part of the three-layer forceps channel pipe is changed into an oval shape, for example, when in vivo biopsy sampling, the biopsy forceps cannot pass through the extrusion deformation position of the forceps channel pipe, and sampling operation cannot be performed.
Disclosure of Invention
The purpose of the invention is that: the forceps channel tube of the medical soft endoscope and the preparation method thereof are reasonable and simple in preparation process, convenient for inserting endoscopic surgical instruments such as biopsy forceps and lithotomy, low in friction coefficient and high in wear resistance of the inner hole wall, low in production cost, convenient for cleaning and disinfection, incapable of hiding bacteria in a channel and capable of effectively avoiding cross infection.
In order to achieve the above object, a first technical solution of the present invention is: a forceps channel tube of a medical soft endoscope is characterized in that: the novel polytetrafluoroethylene hose comprises a polytetrafluoroethylene hose body and a spring, wherein one end of the polytetrafluoroethylene hose body is provided with a bending part which is integrated with the polytetrafluoroethylene hose body, a spiral spring groove is formed in the outer wall of the bending part, and the spring is arranged in the spring groove of the bending part.
In the first technical scheme, the springs are arranged in the spring grooves of the bending parts and are combined with the bending parts into a whole through fluororubber adhesive.
In the first technical scheme, the inner diameter of the polytetrafluoroethylene hose is phi 0.8-phi 5.50 mm, the wall thickness d is 0.13-0.55 mm, and the total length L is 380-1850 mm.
In the first technical scheme, a helical spring groove with circular threads is formed in the outer wall of the bending portion, the length L1 of the spring groove is 90-200 mm, the tooth angle alpha of the spring groove is 30-60 degrees, the pitch P of the spring groove is 0.8-1.5 mm, and the groove bottom of the spring groove is of an R shape.
In the first technical scheme, the hardness of the polytetrafluoroethylene hose is controlled within the range of 50D to 70D.
In the first technical scheme, the inner diameter of the spring is phi 1.0 mm-phi 5.50mm, the length L2 is 90 mm-200 mm, and the pitch P1 of the spring is 0.8 mm-1.5 mm.
In the first technical solution, the spring is formed by winding a steel wire with a circular or rectangular section.
In the first technical solution, the spring includes a front section and a rear section that are integrated with each other, the front section is formed by winding a wire with a circular section, and the rear section is formed by winding a wire with a rectangular section.
In order to achieve the above object, a second technical scheme of the present invention is: a forceps channel tube of a medical soft endoscope is characterized in that: the preparation method comprises the following specific steps:
1. Selecting materials:
Selecting a polytetrafluoroethylene hose meeting the technical parameter requirements as a raw material for preparing a clamp pipe body, a fluororubber adhesive and a stainless steel wire as a raw material for preparing a spiral compression spring, wherein the polytetrafluoroethylene hose has an inner diameter of phi 0.8-phi 5.50 mm, a wall thickness d of 0.13-0.55 mm and a total length L of 380-1850 mm;
2. the processing method of the spring groove at one end of the polytetrafluoroethylene hose comprises the following steps:
machining a spring groove meeting the requirements of a drawing at one end of a polytetrafluoroethylene hose by using a lathe, wherein the length L1 of the spring groove is 90-200 mm, the tooth angle alpha of the spring groove is 30-60 degrees, and the pitch P of the spring groove is 0.8-1.5 mm;
3. the processing method of the helical compression spring comprises the following steps:
Processing a spiral compression spring meeting the requirements of a drawing by using a spiral spring winding machine, wherein the inner diameter of the spring is phi 1.0-phi 5.50mm, the length L2 is 90-200 mm, and the pitch P1 of the spring is 0.8-1.5 mm;
4. the steel wire helical compression spring and the polytetrafluoroethylene hose are assembled into a whole:
a. Before assembly, the part of the polytetrafluoroethylene hose with the spring groove at the front section is inserted into the polytetrafluoroethylene treatment liquid to treat fluorine atoms on the surface of the polytetrafluoroethylene hose so as to increase the strength of the adhesive,
B. remove oil dirt and dust on the surface of the spring, ensure the surface of the spring to be clean,
C. assembling a spring and a spring groove on the polytetrafluoroethylene hose into a whole by using a spring assembling tool for standby;
5. The gluing method of the clamp pipe spring reinforcing section comprises the following steps:
a. Inserting a spring reinforcing section part of the polytetrafluoroethylene hose semi-finished product component into a glue solution of the adhesive, staying and soaking for 3-6 minutes, moving and conveying the soaked rubber solution into a heating oven for heating and curing, wherein the temperature of heating and curing is controlled within a range of 40-55 degrees, the heating and curing time is controlled within a range of 10-50 minutes, and the spring and a spring groove at one end of the polytetrafluoroethylene hose are firmly combined into a whole;
b. and fixing the semi-finished workpiece obtained in the steps on a tool of the V-shaped groove, cutting the semi-finished workpiece according to the designed length and the size by using a small thin grinding wheel high-speed cutting machine, and checking the finished product of the clamp pipe with the length meeting the requirements after finishing cutting and trimming to finish the preparation of the final clamp pipe.
In the second technical scheme, the specific method for assembling the spring and the spring groove on the polytetrafluoroethylene hose into a whole is that the spring assembling tool is a stainless steel tube, the spring is sleeved on the outer diameter of the spring assembling tool, the spring assembling tool is sleeved on the outer diameter of the spring groove of the polytetrafluoroethylene hose, at the moment, the 1 st circle of spring on the outer side of the spring assembling tool is arranged in the first spring groove of the spring groove on the polytetrafluoroethylene hose on the outer side of the head end of the spring assembling tool, and the like, the 2 nd circle, the 3 rd circle, the 4 th circle and the 5 th circle of spring on the outer diameter of the spring assembling tool are sequentially slid out of the end face of the spring assembling tool while moving along with the outer side of the polytetrafluoroethylene hose, and are sequentially slid into the spring grooves of the 2 nd circle, the 3 rd circle, the 4 th circle and the 5 th circle of spring on the polytetrafluoroethylene hose until each circle of spring is completely installed in each spring groove corresponding to the polytetrafluoroethylene hose, and after the assembly of the spring is completed, the spring aperture and the bottom diameter of the spring groove are not gapped, so that the spring and the spiral groove of the polytetrafluoroethylene hose cannot be loosened after the assembly is assembled.
The invention has the positive effects that: after the forceps channel tube of the medical soft endoscope is adopted, as the medical soft endoscope comprises the polytetrafluoroethylene hose and the spring, one end of the polytetrafluoroethylene hose is provided with a bending part which is integrated with the polytetrafluoroethylene hose, the outer wall of the bending part is provided with a spiral spring groove, and the spring is arranged in the spring groove of the bending part; the preparation method of the clamp pipe comprises the specific steps of selecting materials, processing a spring groove at one end of a polytetrafluoroethylene hose, processing a spiral compression spring, combining and assembling a steel wire spiral compression spring and the polytetrafluoroethylene hose into a whole, and gluing a reinforcing section of the clamp pipe spring;
Compared with the polytetrafluoroethylene material in the prior art, the polytetrafluoroethylene hose of the clamp pipe has the advantages that the price of the expanded polytetrafluoroethylene material is 2 times higher than that of the polytetrafluoroethylene hose, so that the cost of raw materials and the production cost are low, and the manufacturing cost is greatly reduced. The bending part is provided with the spring, so that the spring has the advantages that: firstly, after bending, the bending strength is high, the bending angles of the upper, lower, left and right are not deformed to 260 degrees at maximum, and the technical requirement of the roundness of the bending angles is still maintained, so that endoscope surgical instruments such as biopsy forceps, stone extraction and the like used clinically can be easily inserted into and enter the inner cavity of a human body through an endoscope to perform minimally invasive surgery; secondly, the abrasion resistance is high, when the medical soft endoscope is inserted into a surgical instrument related to the medical soft endoscope, the friction force is very small, the surface of the inner hole of the forceps channel tube is effectively protected from being injured by insertion, the smooth and flat surface of the forceps channel tube is effectively cleaned, and small cell tissues, garbage and hidden bacteria or viruses in the inner hole of the forceps channel tube which are contacted with the liquid in the inner cavity of a human body can be effectively cleaned when the endoscope is cleaned and disinfected; thirdly, the medical endoscope disinfectant has good acid liquid and alkali liquid resistance, can resist long-time soaking disinfection of the medical endoscope disinfectant, can resist repeated disinfection within a specified time period, can resist repeated use without being damaged when an endoscope bent angle is operated, and has stable and reliable quality, long service life and low use cost.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a second embodiment of the present invention;
FIG. 3 is a schematic structural view of a third embodiment of the present invention;
FIG. 4 is a schematic view of the construction of the polytetrafluoroethylene hose of the invention;
FIG. 5 is a schematic view of the spring of FIG. 1;
FIG. 6 is a schematic view of the spring of FIG. 2;
Fig. 7 is a schematic view of the structure of the spring in fig. 3.
Detailed Description
The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1,2, 3, 4, 5, 6 and 7, a forceps channel tube of a medical flexible endoscope comprises a polytetrafluoroethylene hose 1 and a spring 2, wherein one end of the polytetrafluoroethylene hose 1 is provided with a bending part 11 which is integrated with the polytetrafluoroethylene hose, the outer wall of the bending part 11 is provided with a spiral spring groove 12, and the spring 2 is arranged in the spring groove 12 of the bending part 11. The bending non-deformation effect of the spring combination section of the polytetrafluoroethylene hose with the spiral spring part is better, when the polytetrafluoroethylene hose is bent to the maximum bending angle of 260 degrees, the roundness tolerance is less than or equal to 0.05mm, and because the outer diameter size of instruments such as biopsy forceps and the like used for endoscope channels is smaller than about 0.2mm of the sizes of forceps channel pipes, the instruments of related endoscopes can completely enter a human body through the aperture of the forceps channel pipes smoothly, and biopsy or minimally invasive surgery can be performed.
As shown in fig. 1,2 and 3, in order to ensure the bonding strength between the spring and the polytetrafluoroethylene hose 1 and prevent the spring from falling off, the spring 2 is arranged in a spring groove of the bending part 11 and the spring 2 and the bending part 11 are bonded into a whole through the fluororubber adhesive 3. The outer diameter of an adhesive protection layer formed after the fluororubber adhesive on the periphery of the spring 2 is solidified is equal to the outer diameter of the polytetrafluoroethylene hose 1, and the viscosity of the fluororubber adhesive before solidification is 2-3.6 mpa.s.
As shown in fig. 1, 2,3 and 4, the polytetrafluoroethylene hose 1 according to the present invention has an inner diameter of Φ0.8- Φ5.50 mm, a wall thickness d of 0.13-0.55 mm, and a total length L of 380-1850 mm. The forceps channel tube can be matched with other medical soft endoscopes such as gastroscope, enteroscope or duodenoscope.
As shown in fig. 4, the outer wall of the curved portion 11 is provided with a helical spring groove 12 with a circular thread, the length L1 of the spring groove 12 is 90mm to 200mm, the tooth angle α of the spring groove 12 is 30 ° to 60 °, the pitch P of the spring groove 12 is 0.8mm to 1.5mm, and the groove bottom shape of the spring groove 12 is R-shaped. The unilateral depth w of the spiral spring groove 12 of the bending part 11 is more than or equal to 1.1 times of the diameter of the spring steel wire. (note: its clamp pipe unilateral wall thickness is more than or equal to 1.6 times of spring wire diameter), ensure polytetrafluoroethylene hose design spring and after assembling, its thread groove bottom designs with the hole wall to have certain thickness.
Furthermore, the hardness of the polytetrafluoroethylene hose 1 is controlled within the range of 50D to 70D, so that the polytetrafluoroethylene hose 1 is not too hard or too soft, and has high compressive strength, good wear resistance and good bending property.
As shown in figures 5, 6 and 7, the spring 2 is formed by winding stainless steel wires, the inner diameter of the spring 2 is phi 1.0 mm-phi 5.50mm, the length L2 is 90 mm-200 mm, and the pitch P1 of the spring is 0.8 mm-1.5 mm. In this way, the bending part 11 is still not deformed when being bent to 260 degrees at maximum when being bent up, down, left and right, and still maintains the technical requirements of roundness, so that the endoscope surgical instruments such as biopsy forceps, lithotomy blue and the like used clinically can be easily inserted into and smoothly enter the human body cavity through the bending part of the endoscope to perform minimally invasive surgery.
As shown in fig. 5 and 6, the spring 2 of the present invention is formed by winding a steel wire with a circular or rectangular cross section, because the compressive strength of the pipe wall of the bent portion of the pipe is higher after the spring 2 with a rectangular cross section is wound around the bent portion, and the effect of not deforming after bending is better.
As shown in fig. 7, the spring 2 includes a front section 21 and a rear section 22 which are integrated with each other, the front section 21 is formed by winding a wire with a circular cross section, and the rear section 22 is formed by winding a wire with a rectangular cross section. Namely, a longer (round section) steel wire is processed into a steel wire with a round section, the half is a flattened steel wire (spring material), and the latter half of the whole round section steel wire used for winding a spring is rolled into a flattened steel wire with a rectangular section through a flattening machine, and then the spring is manufactured. The advantages are that: namely, the two steel wires with different sections are wound on the same 1 steel wire, and the spring has the advantages that 1) the compressive strength of the pipe wall of the bending part wound by the spring with the rectangular section on the rear section 22 of the spring 2 is slightly higher than that of the spring with the rectangular section, the effect of no deformation after bending is further improved, and 2) the bending performance of the clamp pipe of the front section 21 of the spring 2, namely, the clamp pipe of the spring section with the circular section is softer than that of the clamp pipe of the spring section with the rectangular section on the rear section, so that the effect of the bending angle of the whole bending section is better.
As shown in fig. 1,2, 3, 4, 5, 6 and 7, a method for preparing a forceps channel tube of a medical flexible endoscope comprises the following specific preparation steps:
1. Selecting materials:
Selecting a polytetrafluoroethylene hose meeting the technical parameter requirements as a raw material for preparing a clamp pipe body, a fluororubber adhesive and a stainless steel wire as a raw material for preparing a spiral compression spring, wherein the polytetrafluoroethylene hose has an inner diameter of phi 0.8-phi 5.50 mm, a wall thickness d of 0.13-0.55 mm and a total length L of 380-1850 mm;
2. the processing method of the spring groove at one end of the polytetrafluoroethylene hose comprises the following steps:
machining a spring groove meeting the requirements of a drawing at one end of a polytetrafluoroethylene hose by using a lathe, wherein the length L1 of the spring groove is 90-200 mm, the tooth angle alpha of the spring groove is 30-60 degrees, and the pitch P of the spring groove is 0.8-1.5 mm;
3. the processing method of the helical compression spring comprises the following steps:
Processing a spiral compression spring meeting the requirements of a drawing by using a spiral spring winding machine, wherein the inner diameter of the spring is phi 1.0-phi 5.50mm, the length L2 is 90-200 mm, and the pitch P1 of the spring is 0.8-1.5 mm;
4. the steel wire helical compression spring and the polytetrafluoroethylene hose are assembled into a whole:
a. Before assembly, the part of the polytetrafluoroethylene hose with the spring groove at the front section is inserted into the polytetrafluoroethylene treatment liquid to treat fluorine atoms on the surface of the polytetrafluoroethylene hose, so as to improve the adhesive strength,
B. remove oil dirt and dust on the surface of the spring, ensure the surface of the spring to be clean,
C. The spring is assembled with a spring groove on the polytetrafluoroethylene hose into a whole by utilizing a spring assembly tool, and the spring assembly tool is standby and comprises the following concrete steps:
The spring assembly fixture is a thin-wall stainless steel pipe, the inner diameter of the thin-wall stainless steel pipe is larger than the outer diameter of the polytetrafluoroethylene hose, the outer diameter is not very large because the wall thickness of the stainless steel pipe is thinner, the spring holes of the springs can be sleeved on the outer diameter of the spring assembly fixture after being expanded, then the spring assembly fixture is sleeved on the outer diameter of the spring groove of the polytetrafluoroethylene hose, at the moment, the 1 st circle of springs on the outer side of the spring assembly fixture are arranged in the first spring groove of the spring groove on the polytetrafluoroethylene hose on the outer side of the head end of the spring assembly fixture along with the movement of the spring assembly fixture from the outer side of the polytetrafluoroethylene hose, so that the 2 nd, 3 rd, 4 th and 5 th circles of springs on the outer diameter of the spring assembly fixture are sequentially slipped out of the end face of the spring assembly fixture while being moved until each circle of the whole springs is fully installed in the corresponding spring groove of the polytetrafluoroethylene hose, and after the assembly of the springs is completed, the sizes of the spring holes of the springs are equal to the diameters of the bottom of the spring grooves of the spring assembly fixture or the bottom of the spiral grooves are not equal to the spiral grooves of the spring assembly fixture;
5. The gluing method of the clamp pipe spring reinforcing section comprises the following steps:
a. The semi-finished product assembly of a plurality of polytetrafluoroethylene hoses after being assembled with springs is vertically hung upside down and fixed on a lifter, the lifter is started to descend, so that a spring reinforcing section part of the polytetrafluoroethylene hose semi-finished product assembly is inserted into glue solution of an adhesive to be soaked for 3-6 minutes (the viscosity of the adhesive is 2-3.6 mpa.s), the lifter is started to be lifted after soaking, the semi-finished product assembly is moved and conveyed into a heating oven to be heated and solidified, the temperature of the heating and solidification is controlled within the range of 40-55 degrees, the heating and solidification time is controlled within the range of 10-50 minutes, the springs and a spring groove at one end of each polytetrafluoroethylene hose are firmly combined into a whole, and each circle of springs are prevented from slipping from a spiral spring groove of each polytetrafluoroethylene hose;
b. And fixing the semi-finished workpiece obtained in the steps on a tool of the V-shaped groove, cutting the semi-finished workpiece according to the designed length and the size by utilizing a small thin grinding wheel in a high-speed cutting machine, and checking the finished product of the clamp pipe with the length meeting the requirements after finishing cutting and trimming to finish the preparation of the final clamp pipe.
The spring 2 is formed by winding a steel wire with a rectangular section, and the specific preparation method is as follows:
a. firstly, the raw material of the spring is manufactured, the length of the applicable steel wire is also the expanded steel wire material for manufacturing the finished spring product, the stainless steel wire (with circular section) with the diameter of 0.08mm to 0.16mm is pressed by a rolling wheel of a steel wire flattening machine to flatten the stainless steel wire,
B. After the steel wire flattening is finished on the steel wire flattening machine, the steel wire is coiled on a steel wire disc of a machine tool accessory tool rack, and the reference is made to the 'flattening machine operation instruction book'.
C. the upper or lower flattening mould is used, the outer diameter of the upper or lower flattening mould is provided with a rectangular groove, the cross section size of the rectangular groove is consistent with that of the designed flat steel wire, and the spiral compression spring meeting the drawing requirements is processed by a spiral spring winding machine.
The spring 2 of the invention comprises a front section 21 and a rear section 22 which are integrated with each other, wherein the front section 21 is formed by winding steel wires with round cross sections, the rear section 22 is formed by winding steel wires with rectangular cross sections, the bending rigidity of the front section 21 of the spring 2 is lower than that of the rear section 22, namely, the compression strength of the spring with rectangular cross sections is high, and the specific preparation method is as follows:
a. firstly, the raw material of the spring is manufactured, the length of the applicable steel wire is also the expanded steel wire material for manufacturing the finished spring product, the stainless steel wire (with circular section) with the diameter of 0.08mm to 0.16mm is adopted, half of the length of the stainless steel wire is pressed and flattened by a rolling wheel of a steel wire flattening machine,
B. half of the length of the stainless steel wire is processed by a wire flatting mill to be flattened and then coiled on a wire disc of a machine tool accessory tool rack, and the reference is made to the 'flatting mill operation instruction book'.
C. the upper or lower flattening mould is used, and the outer diameter of the upper or lower flattening mould is provided with a rectangular groove which is consistent with the cross section size of the flattening steel wire, and the spiral compression spring meeting the drawing requirements is processed by a spiral spring winding machine.
Compared with the polytetrafluoroethylene material in the prior art, the polytetrafluoroethylene hose of the forceps channel tube has the advantages that the price of the expanded polytetrafluoroethylene material is 2 times higher than that of the polytetrafluoroethylene hose, so that the raw material cost is low, the production cost is low, and the manufacturing cost is greatly reduced. The bending part is provided with the spring, so that the spring has the advantages that: firstly, after bending, the bending strength is high, the bending angles of the upper, lower, left and right are not deformed to 260 degrees at maximum, and the technical requirement of the roundness of the bending angles is still maintained, so that endoscope surgical instruments such as biopsy forceps, stone extraction and the like used clinically can be easily inserted into and enter the inner cavity of a human body through an endoscope to perform minimally invasive surgery; secondly, the abrasion resistance is high, when the medical soft endoscope is inserted into a surgical instrument related to the medical soft endoscope, the friction force is very small, the surface of the inner hole of the forceps channel tube is effectively protected from being injured by insertion, the smooth and flat surface of the forceps channel tube is effectively cleaned, and small cell tissues, garbage and hidden bacteria or viruses in the inner hole of the forceps channel tube which are contacted with the liquid in the inner cavity of a human body can be effectively cleaned when the endoscope is cleaned and disinfected; thirdly, the medical endoscope disinfectant has good acid liquid and alkali liquid resistance, can resist long-time soaking disinfection of the medical endoscope disinfectant, can resist repeated disinfection within a specified time period, can resist repeated use without being damaged when an endoscope bent angle is operated, and has stable and reliable quality, long service life and low use cost.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (2)
1. The utility model provides a preparation method of medical flexible endoscope's clamp pipe, includes medical flexible endoscope's clamp pipe, and it includes polytetrafluoroethylene hose (1) and spring (2), polytetrafluoroethylene hose (1)'s one end has bending portion (11) as an organic whole rather than each other, be equipped with heliciform spring groove (12) on the outer wall of bending portion (11), spring (2) are established in bending portion (11) spring groove (12), spring (2) are established in bending portion (11) spring groove and are combined as an organic whole with bending portion (11) through fluororubber adhesive (3), its characterized in that: the preparation method comprises the following specific steps:
1. Selecting materials:
Selecting a polytetrafluoroethylene hose meeting the technical parameter requirements as a raw material for preparing a clamp pipe body, a fluororubber adhesive and a stainless steel wire as a raw material for preparing a spiral compression spring, wherein the polytetrafluoroethylene hose has an inner diameter of phi 0.8-phi 5.50 mm, a wall thickness D of 0.13-0.55 mm and a total length L of 380-1850 mm, and the hardness of the polytetrafluoroethylene hose (1) is controlled within a range of Shore 50D-Shore 70D;
2. the processing method of the spring groove at one end of the polytetrafluoroethylene hose comprises the following steps:
machining a spring groove meeting the requirements of a drawing at one end of a polytetrafluoroethylene hose by using a lathe, wherein the length L1 of the spring groove is 90-200 mm, the tooth angle alpha of the spring groove is 30-60 degrees, and the pitch P of the spring groove is 0.8-1.5 mm;
3. the processing method of the helical compression spring comprises the following steps:
The method comprises the steps that a spiral spring coiling machine is utilized to process a steel wire spiral compression spring meeting the requirements of drawing, the inner diameter of the spring is phi 1.0-phi 5.50mm, the length L2 is 90-200 mm, the pitch P1 of the spring is 0.8-1.5 mm, the spring (2) comprises a front section (21) and a rear section (22) which are integrated with each other, the front section (21) is formed by coiling steel wires with circular sections, and the rear section (22) is formed by coiling steel wires with rectangular sections;
4. the steel wire helical compression spring and the polytetrafluoroethylene hose are assembled into a whole:
a. Before assembly, the part of the polytetrafluoroethylene hose with the spring groove at the front section is inserted into the polytetrafluoroethylene treatment liquid to treat fluorine atoms on the surface of the polytetrafluoroethylene hose so as to increase the strength of the adhesive,
B. remove oil dirt and dust on the surface of the spring, ensure the surface of the spring to be clean,
C. assembling a spring and a spring groove on the polytetrafluoroethylene hose into a whole by using a spring assembling tool for standby;
5. The gluing method of the clamp pipe spring reinforcing section comprises the following steps:
a. Inserting a spring reinforcing section part of the polytetrafluoroethylene hose semi-finished product component into a glue solution of the adhesive, staying and soaking for 3-6 minutes, moving and conveying the soaked rubber solution into a heating oven for heating and curing, wherein the temperature of heating and curing is controlled within a range of 40-55 degrees, the time of heating and curing is controlled within a range of 10-50 minutes, and the spring is firmly combined with a spring groove at one end of the polytetrafluoroethylene hose into a whole;
b. and fixing the semi-finished workpiece obtained in the steps on a tool of the V-shaped groove, cutting the semi-finished workpiece according to the designed length and the size by using a small thin grinding wheel high-speed cutting machine, and checking the finished product of the clamp pipe with the length meeting the requirements after finishing cutting and trimming to finish the preparation of the final clamp pipe.
2. The method for preparing a forceps channel tube of a medical flexible endoscope according to claim 1, wherein the method comprises the following steps: the specific method for combining and assembling the spring and the spring groove on the polytetrafluoroethylene hose is that the spring assembling tool is a stainless steel tube, the spring is sleeved on the outer diameter of the spring assembling tool, the spring assembling tool is sleeved on the outer diameter of the spring groove of the polytetrafluoroethylene hose, at the moment, the 1 st circle of spring on the outer side of the spring on the spring assembling tool is arranged in the first spring groove of the spring groove on the polytetrafluoroethylene hose on the outer side of the head end of the spring assembling tool along with the movement of the spring assembling tool from the polytetrafluoroethylene hose to the outside, and the 2 nd, 3 rd, 4 th and 5 th circles of springs on the outer diameter of the spring assembling tool are sequentially slid out of the end face of the spring assembling tool and sequentially slid into the spring grooves of the 2 nd, 3 th, 4 th and 5 th circles of springs on the polytetrafluoroethylene hose until each circle of springs is completely installed in each spring groove corresponding to the polytetrafluoroethylene hose, and after the assembly of the spring and the spiral groove of the polytetrafluoroethylene hose are assembled, the spring and the spiral groove of the polytetrafluoroethylene hose cannot be loosened after the assembly is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011045679.8A CN112155612B (en) | 2020-09-29 | 2020-09-29 | Forceps channel tube of medical soft endoscope and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011045679.8A CN112155612B (en) | 2020-09-29 | 2020-09-29 | Forceps channel tube of medical soft endoscope and preparation method |
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| CN112155612B true CN112155612B (en) | 2024-06-14 |
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| US4801106A (en) * | 1986-11-04 | 1989-01-31 | Kabushiki Kaisha Kobe Seiko Sho | Coil of tapered wire |
| JPH01310637A (en) * | 1988-06-08 | 1989-12-14 | Asahi Optical Co Ltd | Channel tube of endoscope |
| JPH0985376A (en) * | 1995-09-25 | 1997-03-31 | Vadnais Technol Corp | Method and apparatus for forming spring and product thereof |
| DE102018217195A1 (en) * | 2018-10-09 | 2020-04-09 | Robert Bosch Gmbh | feather |
| CN213551993U (en) * | 2020-09-29 | 2021-06-29 | 常州延顺光电科技有限公司 | Bending non-deforming clamp tube of medical flexible endoscope |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB258483A (en) * | 1926-02-26 | 1926-09-23 | Edwin Barnes | Improvements in or relating to coiled springs |
| US20020190451A1 (en) * | 2001-06-01 | 2002-12-19 | The University Of Akron | Fiber-reinforced composite springs |
| US20040215109A1 (en) * | 2003-04-23 | 2004-10-28 | Pingleton Edward D. | Helical guidewire |
| CN200946723Y (en) * | 2006-06-27 | 2007-09-12 | 漯河科莱堡洁具配件有限公司 | Plastic screw enwound reinforced composite hose |
| DE102018129549B9 (en) * | 2018-11-23 | 2022-08-18 | Action Composites Hightech GmbH | Shaping the ends of coil springs |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4801106A (en) * | 1986-11-04 | 1989-01-31 | Kabushiki Kaisha Kobe Seiko Sho | Coil of tapered wire |
| JPH01310637A (en) * | 1988-06-08 | 1989-12-14 | Asahi Optical Co Ltd | Channel tube of endoscope |
| JPH0985376A (en) * | 1995-09-25 | 1997-03-31 | Vadnais Technol Corp | Method and apparatus for forming spring and product thereof |
| DE102018217195A1 (en) * | 2018-10-09 | 2020-04-09 | Robert Bosch Gmbh | feather |
| CN213551993U (en) * | 2020-09-29 | 2021-06-29 | 常州延顺光电科技有限公司 | Bending non-deforming clamp tube of medical flexible endoscope |
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| CN112155612A (en) | 2021-01-01 |
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