A device and method for preparing a glue-free glass optical fiber bundle for medical endoscope illumination

Abstract

The present invention discloses a device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination, comprising an operating platform, a vertical bracket being arranged on the operating platform, a lifting screw rod assembly and a hexagonal transmission assembly being arranged on the vertical bracket, the hexagonal transmission assembly comprising a first hexagonal column and a second hexagonal column being arranged separately, a lifting base being arranged on the screw rod lifting assembly, a fixed base being arranged below the lifting base, an upper belt transmission assembly and an upper drill bit clamp being arranged on the lifting base, a lower drill bit clamp being arranged on the fixed base corresponding to the upper drill bit clamp, the lower drill bit clamp being connected to the second hexagonal column through a lower belt transmission assembly, a synchronous sleeve being arranged between the first hexagonal column and the second hexagonal column, the synchronous sleeve being connected to the lifting assembly, the lifting assembly driving the synchronous sleeve axis to move, a brake being arranged between the second hexagonal column and the fixed base, and a method for preparing an optical fiber bundle by twisting is also disclosed. The present invention has a simple structure and can efficiently assist in the production of optical fiber bundles.

Description

Technical Field

[0001] The invention relates to the technical field of fused optical fiber preparation, and in particular to a device and method for preparing a glue-free glass optical fiber bundle for medical endoscope illumination. Background Art

[0002] Medical endoscope systems often require glass fiber bundles to transmit illumination light. Since the temperature at the light source is extremely high, existing fiber bundles are not heat-resistant during use and often fail due to burning. It is often necessary to purchase high-end foreign fiber bundles as replacements.

[0003] High-end optical fiber bundles are generally fused optical fiber bundles, which are composed of a bunch of very thin (about 100-600μm in diameter) quartz fiber filaments, which are melted with an external glass tube to form a transmission end, and then metal parts are used on the outside to protect the glass optical fiber bundle to obtain a finished joint.

[0004] The quality of the molten end of the optical fiber bundle directly affects the quality of use. The finished product of the existing molten optical fiber bundle has more impurities and bubbles, the melting effect is poor, and it also needs the help of auxiliary glue and other materials to complete the preparation. These factors are very likely to cause optical fiber damage when used in a high-energy environment. In addition, the research on molten optical fiber bundles is mainly based on foreign special optical fiber suppliers. Therefore, our company has proposed a new high-quality preparation solution and provided a matching preparation device. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device and method for preparing a glue-free glass optical fiber bundle for medical endoscope illumination, which has a simple structure and can efficiently assist in the production of optical fiber bundles.

[0006] In order to solve the above technical problems, the present invention provides a device for preparing a glue-free glass optical fiber bundle for medical endoscope illumination, including an operating platform, a vertical bracket is arranged on the operating platform, a lifting motor and a rotating motor are arranged on the top of the vertical bracket, a lifting screw rod assembly connected to the lifting motor is arranged on the surface of the vertical bracket, the rotating motor is connected to a first hexagonal column, a lifting base is arranged on the screw rod lifting assembly, a fixed base is arranged under the lifting base, an upper driving pulley and an upper driven pulley are arranged on the lifting base, bearings are arranged between the upper driving pulley and the lifting base and between the upper driven pulley and the lifting base, and the upper driving pulley is arranged on the lifting base through a hexagonal inner cavity arranged inside On the first hexagonal column, the upper driving pulley is connected to the upper driven pulley through the upper transmission belt, and an upper drill bit clamp is also provided below the upper driven pulley, the upper driven pulley rotates synchronously with the upper drill bit clamp and is arranged through, a lower drill bit clamp is provided on the fixed base corresponding to the upper drill bit clamp, the lower drill bit clamp is connected to the lower driving pulley through the lower driven pulley and the lower transmission belt, the lower driving pulley is sleeved and fixed on the second hexagonal column, the first hexagonal column and the second hexagonal column are located on the same axis, a synchronous sleeve is also provided between the first hexagonal column and the second hexagonal column, the synchronous sleeve is connected to the lifting arm assembly, the lifting arm assembly drives the synchronous sleeve axis to move, and a brake is also provided between the second hexagonal column and the fixed base.

[0007] Furthermore, the synchronization sleeve includes a support plate and an upper sleeve and a lower sleeve arranged on two surfaces of the support plate, the upper sleeve and the lower sleeve are both provided with hexagonal inner walls, the upper sleeve is sleeved on the first hexagonal column, and a compression spring is also provided between the inner bottom of the upper sleeve and the end of the first hexagonal column, the lower sleeve is used to be sleeved on the second hexagonal column, the lifting arm assembly includes a lifting cylinder, the lifting cylinder is connected to the support arm, the support arm is provided with an avoidance groove, and the support arm is arranged below the support plate.

[0008] Furthermore, at least two universal balls are arranged on the support arm.

[0009] Furthermore, the first hexagonal column is fixed on the vertical bracket through a support plate.

[0010] Furthermore, a gas rotary joint is arranged above the upper driven pulley, a driven pipe is arranged between the gas rotary joint and the upper driven pulley, and the gas rotary joint is installed on the vertical bracket through a fixing frame.

[0011] Furthermore, the gas rotary joint and the upper driven pulley are both provided with hollow plugs, and the two hollow plugs are inserted into the two ends of the driven pipe and fixed.

[0012] Furthermore, the hollow plug head comprises a metal ring, an annular rubber sleeve is sleeved on the outer circumference of the metal ring, and an anti-slip convex portion is arranged on the outer surface of the annular rubber sleeve.

[0013] Furthermore, a melting bracket is provided on the operating platform, and the melting bracket is used to fix the flame gun, and the flame gun is connected to the oxyhydrogen flame machine, and the oxyhydrogen flame machine is fixedly arranged on the operating platform.

[0014] A method for preparing a non-glue glass optical fiber bundle for medical endoscope lighting, comprising any one of the preparation devices described above, and the specific steps are as follows:

[0015] Step 1) Material preparation: select the number of optical fiber filaments according to the number of inner cores, then use an alcohol lamp to burn one end of the optical fiber filament to remove the coating, put the burned optical fiber filament into a beaker filled with sulfuric acid to soak and remove impurities, rinse the optical fiber soaked in sulfuric acid with clean water, blow it dry with an air gun, and finally wipe it with clean paper dipped in alcohol for standby use; then put the quartz tube into an ultrasonic machine filled with alcohol for cleaning, and then blow it dry with an air gun for standby use;

[0016] Step 2) inserting the uncoated end of the spare optical fiber into the spare quartz tube; firstly, the uncoated end of the optical fiber is placed against a flat plate to level the end, and then the optical fiber is bundled with a thin wire to ensure that the bundle is dense, and then the uncoated end is inserted into the quartz tube and at least to the other end, and then the thin wire is removed;

[0017] Step 3) Melting preparation: fix the two ends of the quartz tube after the tube is threaded on the upper drill clamp and the lower drill clamp of the preparation device, then start the rotary motor, the upper drill clamp and the lower drill clamp rotate synchronously at a uniform speed, then turn on the hydrogen and oxygen machine, and use the igniter to ignite the flame gun for standby use;

[0018] Step 4) melting; direct the flame of the flame gun straight or obliquely to the lower end of the sleeve and keep a proper distance, first preheat the middle and lower part of the quartz tube evenly to quickly discharge the water vapor, continue to melt the quartz tube with the outer flame after the preheating is completed, and after the middle part of the quartz tube softens, the lower drill bit clamp is fixed and the upper drill bit clamp is rotated at a certain angle to twist the quartz tube. After the deformation is completed, continue to keep warm for at least 5 minutes and slowly cool to room temperature until the stress is completely released;

[0019] Step 6) The torsional deformation part is cut off from the middle, and then the cut end surface is ground and polished to obtain the finished product.

[0020] Furthermore, the heating temperature of the flame gun is at least 600 degrees; and the rotation angle of the upper drill bit clamp is 10-15 degrees.

[0021] Beneficial effects of the present invention:

[0022] 1. The first hexagonal column and the second hexagonal column are connected by a synchronous sleeve, and the synchronous sleeve can move, so that the first hexagonal column and the second hexagonal column can perform synchronous and asynchronous actions, thereby satisfying the uniform heating during melting and the twisting process rotation, with a simple structure and stable operation.

[0023] 2. The vertical arrangement is adopted for melting, which will not cause sagging due to its own weight after melting, and effectively improves the melting quality. The rotating motor is fixed on the vertical bracket to ensure that the load on the lifting base is greatly reduced, so that the lifting movement is stable, wear is reduced, and the service life is increased.

[0024] 3. The upper drill bit clamp can quickly and reliably clamp the casing, is easy to operate, has low preparation cost, and has good centering effect.

[0025] 4. The preparation method of the present invention does not use any epoxy resin or adhesive in the preparation process. It is prepared by directly melting the end, and the sleeve and the optical fiber are more tightly combined by twisting during the melting process. The optical fiber arrangement can be a standard honeycomb structure, so it can be applied to a temperature range of up to 500°C, meeting the use of a medical endoscope light source environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the synchronous sleeve part of the present invention;

[0028] Figure 3 It is a partial cross-sectional schematic diagram of the synchronous sleeve of the present invention;

[0029] Figure 4 is a schematic cross-sectional view of the vacuum portion of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of a molten stent in one embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the rapid response box of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the present invention in which the spring piece is arranged. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] Reference Figure 1As shown, an embodiment of the device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination of the present invention comprises an operating platform 1, a vertical bracket 2 is arranged on the operating platform, a lifting motor 3 and a rotating motor 4 are arranged on the top of the vertical bracket, a lifting screw rod assembly 5 connected to the lifting motor is arranged on the surface of the vertical bracket, the rotating motor is connected to the first hexagonal column 6, a lifting base 7 is arranged on the screw rod lifting assembly, a fixed base 8 is arranged below the lifting base, an upper driving pulley 9 and an upper driven pulley 10 are arranged on the lifting base, bearings are arranged between the upper driving pulley and the lifting base and between the upper driven pulley and the lifting base, and the upper driving pulley is sleeved on the first hexagonal column through a hexagonal inner cavity arranged inside The upper driving pulley is connected to the upper driven pulley through the upper transmission belt, and an upper drill bit clamp 11 is also provided below the upper driven pulley. The upper driven pulley rotates synchronously with the upper drill bit clamp and is arranged through. A lower drill bit clamp 12 is provided on the fixed base corresponding to the upper drill bit clamp. The lower drill bit clamp is connected to the lower driving pulley 14 through the lower driven pulley 13 and the lower transmission belt. The lower driving pulley is sleeved and fixed on the second hexagonal column 15. The first hexagonal column and the second hexagonal column are located on the same axis. A synchronous sleeve 16 is also provided between the first hexagonal column and the second hexagonal column. The synchronous sleeve is connected to the lifting arm assembly 17. The lifting arm assembly drives the synchronous sleeve axis to move. A brake 18 is also provided between the second hexagonal column and the fixed base.

[0035] The upper active pulley, the upper transmission belt and the upper driven pulley cooperate to form an upper belt transmission assembly, and the upper belt transmission assembly can be driven by the lifting base to lift and move. During the lifting and lowering, due to the design of the first hexagonal column, the upper active pulley will not interfere with the first hexagonal column and can be directly lifted and moved. The lower active pulley, the lower transmission belt and the lower driven pulley cooperate to form a lower belt transmission assembly. The lower belt transmission assembly does not need to be lifted and moved. The first hexagonal column and the second hexagonal column are set with a synchronous sleeve to achieve a synchronous rotation effect. When in use, the lifting motor first drives the screw lifting assembly to descend, and the screw lifting assembly drives the lifting base to descend. After it falls into place, the optical fiber is inserted into the casing, and then the inserted whole is lowered from the center of the driven pulley until it passes through the upper drill bit clamp, and then continues to be inserted into the lower drill bit clamp, and then the upper drill bit clamp and the lower drill bit clamp are adjusted to clamp the casing to achieve fixation. After fixation, the casing is calibrated by an oxyhydrogen flame gun The middle part can be heated and melted. While heating, the rotating motor drives the first hexagonal column to rotate, and the rotation of the first hexagonal column drives the synchronous sleeve to rotate, and the synchronous sleeve drives the second hexagonal column to rotate, thereby realizing the synchronous rotation of the first hexagonal column and the second hexagonal column. The first hexagonal column drives the upper belt transmission assembly to drive, that is, drives the upper drill bit clamp to rotate, and the second hexagonal column drives the lower belt transmission assembly to rotate, that is, drives the lower drill bit clamp to rotate. Because it is synchronous rotation, the upper drill bit clamp and the lower drill bit clamp also have a synchronous rotation effect, and the casing is synchronously heated through synchronous rotation. When a twisting action is required, the lifting arm assembly drives the synchronous sleeve to move upward. When the synchronous sleeve is separated from the second hexagonal column, the rotation of the first hexagonal column will not drive the second hexagonal column to rotate. After the second hexagonal column is stopped by the brake, the rotating motor drives the first hexagonal column to rotate, and drives the upper drill bit clamp to rotate, that is, one end of the casing rotates and the other end does not rotate, thereby realizing a twisting effect.

[0036] The synchronous sleeve includes a support plate 19 and an upper sleeve 20 and a lower sleeve 21 arranged on the two surfaces of the support plate. The upper sleeve and the lower sleeve are both provided with inner hexagonal inner walls. The upper sleeve is sleeved on the first hexagonal column. A compression spring 22 is also provided between the inner bottom of the upper sleeve and the end of the first hexagonal column. The lower sleeve is used to be sleeved on the second hexagonal column. The lifting arm assembly includes a lifting cylinder 23. The lifting cylinder is connected to the support arm 24. The support arm is provided with an avoidance groove. The support arm is arranged below the support plate. The lifting cylinder drives the support arm to move up and down. When rising, the support arm can move up with the support plate. At this time, the support plate rises with the upper sleeve and the lower sleeve. Finally, the lower sleeve is separated from the second hexagonal column. At this time, the first hexagonal column and the second hexagonal column will not rotate synchronously. Refer to Figure 3As shown, the rotation of the first hexagonal column drives the upper active pulley to rotate, but cannot drive the lower active pulley to rotate, thereby achieving a twisting effect. Of course, the brake is also assisted. The brake includes a friction block 181 fixed on the second hexagonal column and a brake cylinder 182 on the fixed base. The brake cylinder is provided with an arc brake pad 183. When separated, the brake cylinder is actuated to push the arc brake pad to contact the friction block, so that the second hexagonal column cannot rotate. When the second hexagonal column cannot rotate, the lower drill bit clamp connected to it cannot rotate either. The twisting effect is effectively simulated by a structural mode in which one rotates and the other does not rotate, and the preparation process effect is met. In order to ensure the rotation effect, at least two universal ball bearings 25 are also arranged on the support arm to effectively reduce the rotation friction and ensure the rotation stability and accuracy. A detection sensor 26 is also arranged on the support arm. When the first hexagonal column and the second hexagonal column need to rotate synchronously, the synchronization sleeve needs to be reset. Whether the synchronization sleeve has completed the reset can be sensed by the detection sensor. It is convenient and reliable. When resetting, the lifting cylinder is actuated to make the support arm go down. The support plate is not supported by the support arm. The compressed spring will move the synchronization sleeve downward. When the synchronization sleeve is relative to the second hexagonal column, it can be dropped and set on the second hexagonal column. When the position is misaligned, it cannot fall. At this time, the detection sensor cannot detect the support plate. Then the first hexagonal column rotates to drive the synchronization sleeve to rotate, so that the synchronization sleeve matches the position of the second hexagonal column to achieve falling. After falling, it can be detected by the detection sensor. The first hexagonal column is fixed to the vertical bracket by a support plate to ensure the stability of the first hexagonal column.

[0037] In order to improve the preparation quality, vacuum adsorption is performed on the sleeve during the melting process. The specific structure is as follows: a gas rotary joint 27 is arranged above the upper driven pulley, a driven tube 28 is arranged between the gas rotary joint and the upper driven pulley, the gas rotary joint is installed on the vertical bracket through a fixed frame, and a driven tube cover is arranged on the molten optical fiber bundle for vacuuming. The driven tube rotates together with the optical fiber bundle, which is safe and reliable, and the driven tube can also protect the optical fiber filaments extending out of the sleeve, thereby improving the yield rate of the finished product after preparation. Specifically, a hollow plug 29 is arranged on the gas rotary joint and the upper driven pulley, and the two hollow plugs are inserted into the two ends of the driven tube and fixed, and the hollow plug includes a metal ring 30, and an annular rubber sleeve 31 is sleeved on the outer periphery of the metal ring, and an anti-skid convex portion is arranged on the outer surface of the annular rubber sleeve, and the annular rubber sleeve ensures the stability of the sealing effect, and an anti-skid convex portion is arranged on the outer surface of the annular rubber sleeve, so as to achieve a firm fixing effect while sealing, and can rotate synchronously. During the specific installation, after the drill clamp clamps the casing, the driven tube is first sleeved on the optical fiber bundle, and then the lower end is inserted into the corresponding hollow plug to achieve preliminary fixation. Subsequently, during the rising process of the lifting base, it is aligned with the corresponding hollow plug at the upper end, and the upper end of the driven tube is inserted into the corresponding hollow plug through the thrust of the lifting base when it rises, and then the rising is stopped. The size of the driven tube can be determined according to the prepared length and the melting position.

[0038] A melting bracket 32 ​​is provided on the operating platform, and is used to fix the flame gun. The flame gun is connected to the oxyhydrogen flame machine, and the oxyhydrogen flame machine is fixedly arranged on the operating platform. The side of the vertical bracket is also connected to the baffle through a hinge. When the flame gun is melting, high temperature is prone to accidents. Therefore, the baffle can block and protect the flame gun in the spraying direction, and the hinge can ensure that the baffle can be moved, so it will not get in the way during maintenance and installation of the casing.

[0039] In one embodiment, referring to Figure 5As shown, in order to better assist preparation, a melting support that is easy to adjust is also provided, the melting support includes a switch-type magnetic base 31, a manual two-axis movable platform 32 is arranged on the switch-type magnetic base, front and rear fine-tuning screws 33 and left and right fine-tuning screws 34 are arranged on the manual two-axis movable platform, a miniature lifter 35 is also arranged on the top of the manual two-axis movable platform, the miniature lifter includes a bottom plate 36 and a top plate 37 arranged in parallel, a lifting guide module 38 and a lifting fine-tuning screw 39 are arranged between the bottom plate and the top plate, a clamping base 310 is arranged on the surface of the top plate, a horizontal clamping through hole 311 is opened on the clamping base, a spiral pressing knob 312 is arranged on the top of the clamping base, and the clamping base fixes the flame gun body in the horizontal clamping through hole through the spiral pressing knob. When in use, place the switch-type magnetic base directly on the platform, then turn on the switch so that the switch-type magnetic base is firmly fixed to ensure that the upper structure does not shake, then extend the flame gun into the horizontal clamping through hole, turn the spiral push-down knob, so that the spiral push-down knob rotates and presses the flame gun, thereby achieving fixation. The operation is simple, and then adjust the front and rear fine-tuning screws, left and right fine-tuning screws, and lifting fine-tuning screws according to the melting position. Of course, it can also be adjusted after ignition or during the melting process. When adjusting the above operation, due to the stable adsorption of the bottom, it is safe and reliable, and it will not be accidentally touched and tipped over during the melting process, and it will not shake during melting, thereby improving the preparation quality.

[0040] Reference Figure 5 and Figure 6As shown, since the melting is done manually, a quick response mechanism is provided to avoid losses caused by improper operation when the fire source needs to be evacuated quickly due to negligence or the need to evacuate quickly. A quick response box 313 is provided between the top plate and the clamping base, a supporting foot 314 is provided at the bottom of the quick response box, a rotating column 315 is provided in the quick response box, the top of the rotating column passes through the top of the quick response box and is connected to the clamping base, the bottom of the rotating column passes through the bottom of the quick response box and is connected to the limiting bottom plate 316, a torsion spring is provided between the rotating column and the inside of the quick response box, a torsion limiting column 317 is provided on the surface of the rotating column, a rotation limiting groove 318 is provided on the surface of the quick response box corresponding to the torsion limiting column, the torsion limiting column is provided in the rotation limiting groove to limit the rotation angle of the rotating column, and the rotation limiting groove includes an upper limit groove 319, an inclined slide 320 and a lower slide 321 connected in sequence. When in use, the torsion limit post is located in the upper limit slot. At this time, the torsion spring is twisted and force is accumulated, and its torsion can limit the torsion limit post in the upper limit slot and cannot rotate. When it is necessary to evacuate the fire source, directly tap the spiral pressure knob, and the spiral pressure knob squeezes the clamping base downward, that is, the rotating column moves downward, and after moving downward, it will also move downward with the torsion limit post and disengage from the upper limit slot. Since there is no restriction on the side wall of the upper limit slot, the torsion force of the torsion spring is released, so that the rotating column rotates, driving the torsion limit post to rotate and move to the inclined slide and the lower slide and then stop moving, that is, it rotates a certain angle, effectively evacuating the fire source; the operation is simple and can be responded to quickly. The trigger position is located at the top, which is convenient for operation and greatly shortens the evacuation time.

[0041] Reference Figure 7 As shown, in order to avoid the fire source being evacuated due to accidental touch, a spring clip 322 is also provided in the quick response box. The direction of the spring clip is consistent with the inclination direction of the oblique slide and is located below the torsion limit column. When pressed down by accidental touch, the spring clip provides a downward pressure reaction force. The downward pressure will not be particularly large when accidentally touched, so the spring clip is sufficient to keep the torsion limit column in the upper limit groove without falling out. Therefore, when the downward pressure of the accidental touch disappears, the torsion limit column can be squeezed and reset to the upper limit groove by the spring clip, which is stable and reliable to use. When the downward pressure continues and the downward pressure is greater than the upper limit groove, the torsion limit column will break away from the upper limit groove and enter the oblique slide. At this time, the torsion limit column is driven to rotate by the torsion spring. At the same time, the spring clip also has elastic force, which can push the torsion limit column toward the oblique slide, forming an effect of strengthening rotation and improving the evacuation effect. Therefore, the above-mentioned spring clip can not only keep the torsion limit column from sliding when accidentally touched, but also assist in movement after unlocking.

[0042] Therefore, the switch-type magnetic base of the above-mentioned melting bracket has a strong suction force, stable and reliable fixation, and is easy to disassemble compared with magnets. During the movement, there is no need to pull out the magnet with force, and the switch can be turned off directly; rough adjustment can be made by placing it, and then it can be freely adjusted in space through three fine-tuning screws, with a small adjustment range and high precision, and there is no problem of difficulty in adjustment due to large manual adjustment range; the micro lift has a simple structure and a small height, which avoids the problem of the overall height being too high to meet the melting height problem

[0043] The present invention also discloses a method for preparing a glue-free glass optical fiber bundle for medical endoscope illumination, which is processed by using the above-mentioned preparation device, and the specific steps are as follows:

[0044] First, prepare the materials; select the number of optical fiber strands according to the number of inner cores, then use an alcohol lamp to burn one end of the optical fiber strand to coat it, soak the burned optical fiber strand in a beaker of sulfuric acid to remove impurities, rinse the fiber strand soaked in sulfuric acid with clean water, blow it dry with an air gun, and finally wipe it with clean paper dipped in alcohol for later use; then put the quartz tube into an ultrasonic machine filled with alcohol for cleaning, and then blow it dry with an air gun for later use;

[0045] Then, insert the uncoated end of the spare optical fiber into the spare quartz tube; first, place the uncoated end of the optical fiber against the flat plate to level the end, then use a thin wire to bundle the optical fiber to ensure that the bundle is dense, then insert the uncoated end into the quartz tube and at least to the other end, of course, it can also be extended, but the extended length should not be too long, and then remove the thin wire;

[0046] Then, the melting preparation is carried out; the two ends of the quartz tube after the tube is fixed on the upper drill clamp and the lower drill clamp of the preparation device, and then the rotary motor is started, and the upper drill clamp and the lower drill clamp rotate synchronously at a uniform speed, and then the hydrogen and oxygen machine is turned on, and the igniter is used to ignite the flame gun for standby use;

[0047] After preparation, melt it; aim the flame of the flame gun straight or obliquely at the lower end of the sleeve and keep a proper distance. First, preheat the middle and lower part of the quartz tube evenly to quickly discharge the water vapor. After the preheating is completed, continue to melt the quartz tube with an external flame to at least 600 degrees. After the middle part of the quartz tube softens, the lower drill clamp is fixed and the upper drill clamp is rotated 10-15 degrees to twist the quartz tube. After the deformation is completed, continue to keep warm for at least 5 minutes and slowly cool to room temperature until the stress is completely released; twisting deformation can increase the bonding effect after melting, and the twisting extrusion force forces the quartz tube to tighten inward, so that the wrapping is better, the optical fiber can be completely melted together, and the end face of a single optical fiber is deformed into a hexagonal shape, and the structure is stable and reliable.

[0048] Finally, the torsional deformation part is cut off from the middle, and then the cut end face is ground and polished to obtain the finished product.

[0049] During the experiment of the above scheme, it was found that the main factors of preparation quality have the following problems: The first influencing factor is the cleanliness of the optical fiber. Before the experiment, the optical fiber coating was burned off with an alcohol lamp, and then wiped with clean paper dipped in alcohol, but many bubbles were generated during the melting process. Considering that part of the coating was not completely burned during the process of burning the optical fiber, it was not wiped off with clean paper dipped in alcohol, but it was not observed by the human eye. Therefore, sulfuric acid was used to soak it after the alcohol was burned. Because the optical fiber coating is a polymer material, soaking it in concentrated sulfuric acid can quickly oxidize and decompose the coating, and finally achieve the purpose of completely removing the coating. Therefore, after the optical fiber is burned off with an alcohol lamp, it is soaked in sulfuric acid for about 3 minutes, then rinsed with clean water, and then wiped with clean paper dipped in alcohol, and finally threaded into a tube for use.

[0050] The second influencing factor is the size of the flame. Since the hydrogen-oxygen machine used is equipped with large and small flames with different amounts of hydrogen-oxygen flames. In the experiment, we conducted a comparative experiment on the melting conditions of large and small flames. First, a small flame was used for melting, and there were many bubbles. Because the flame of the small flame is more concentrated and the temperature is high, the temperature is difficult to control during the ablation process. Therefore, the temperature is too high, causing the fiber cladding to be burned and exploded, and the outer quartz tube has been melted, so the bubbles cannot be discharged, causing the bubbles to gather rapidly. Then a large flame was used for melting. The flame of the large flame is more dispersed, the temperature is relatively low, and it is easier to control. The temperature is between below the melting point of the fiber cladding and above the melting point of quartz. The bubbles are significantly reduced during the melting process of the large flame.

[0051] The third factor is the problem of internal and external flames. When we conducted the melting experiment, we found that the internal and external flames of the flame also had a great influence on the melting process. During the internal flame melting process, the impact force is relatively large, which causes the thermal stress of the quartz tube to change, and the heat shrinkage is uneven, so there will be more bubbles melted between the tube and the optical fiber, and there will also be problems such as bending. When the external flame is used for melting, the flame impact force is relatively small, and it has almost no effect on the thermal stress of the quartz tube. Therefore, the external flame is selected for melting, and the bubbles are reduced.

[0052] In summary, the optical fiber bundle prepared by the method has fewer bubbles and a high degree of bonding, and presents an overall tightly arranged structure. The optical fiber bundle with glue produced by ordinary processes has voids inside, and the glue is ordinary epoxy glue, which is resistant to a temperature of 250°. When encountering a high temperature of the light source, the end face is easily burned. The end face glue-free optical fiber bundle scheme implemented by the present invention can normally transmit high-temperature output light, is resistant to a temperature of more than 500 degrees, and has a long service life.

[0053] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination, characterized in that: The invention comprises an operating platform, wherein a vertical bracket is arranged on the operating platform, a lifting motor and a rotating motor are arranged on the top of the vertical bracket, a lifting screw rod assembly connected to the lifting motor is arranged on the surface of the vertical bracket, the rotating motor is connected to the first hexagonal column, a lifting base is arranged on the screw rod lifting assembly, a fixed base is arranged under the lifting base, an upper driving pulley and an upper driven pulley are arranged on the lifting base, bearings are arranged between the upper driving pulley and the lifting base and between the upper driven pulley and the lifting base, the upper driving pulley is sleeved on the first hexagonal column through the hexagonal inner cavity arranged inside, and the upper driving pulley is sleeved on the first hexagonal column through the upper driving inner cavity arranged inside The driven belt is connected to the upper driven pulley, and an upper drill bit clamp is also provided below the upper driven pulley, the upper driven pulley rotates synchronously with the upper drill bit clamp and is arranged through, a lower drill bit clamp is provided on the fixed base corresponding to the upper drill bit clamp, the lower drill bit clamp is connected to the lower driving pulley through the lower driven pulley and the lower transmission belt, the lower driving pulley is sleeved and fixed on the second hexagonal column, the first hexagonal column and the second hexagonal column are located on the same axis, a synchronous sleeve is also provided between the first hexagonal column and the second hexagonal column, the synchronous sleeve is connected to the lifting arm assembly, the lifting arm assembly drives the synchronous sleeve axis to move, and a brake is also provided between the second hexagonal column and the fixed base; The first hexagonal column and the second hexagonal column are connected by a synchronous sleeve, and the synchronous sleeve can move, so that the first hexagonal column and the second hexagonal column can perform synchronous and asynchronous actions, thereby satisfying the process rotation of uniform heating and twisting during melting; The synchronous sleeve includes a support plate and an upper sleeve and a lower sleeve arranged on two surfaces of the support plate, the upper sleeve and the lower sleeve are both provided with inner hexagonal inner walls, the upper sleeve is sleeved on the first hexagonal column, a compression spring is further provided between the inner bottom of the upper sleeve and the end of the first hexagonal column, the lower sleeve is used to be sleeved on the second hexagonal column, the lifting arm assembly includes a lifting cylinder, the lifting cylinder is connected to the support arm, the support arm is provided with an avoidance groove, and the support arm is arranged below the support plate; A gas rotary joint is arranged above the upper driven pulley, a driven pipe is arranged between the gas rotary joint and the upper driven pulley, and the gas rotary joint is installed on the vertical bracket through a fixing bracket.

2. The device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination according to claim 1, characterized in that: At least two universal balls are also arranged on the support arm.

3. The device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination according to claim 1, characterized in that: The first hexagonal column is fixed on the vertical bracket through a support plate.

4. The device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination according to claim 1, characterized in that: The gas rotary joint and the upper driven pulley are both provided with hollow plugs, and the two hollow plugs are matched and inserted into the two ends of the driven pipe and fixed.

5. The device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination according to claim 4, characterized in that: The hollow plug head comprises a metal ring, an annular rubber sleeve is sleeved on the outer circumference of the metal ring, and an anti-slip convex portion is arranged on the outer surface of the annular rubber sleeve.

6. The device for preparing a non-glue glass optical fiber bundle for medical endoscope illumination according to claim 1, characterized in that: The operating platform is provided with a melting bracket, which is used to fix the flame gun. The flame gun is connected to an oxyhydrogen flame machine, and the oxyhydrogen flame machine is fixedly arranged on the operating platform.

7. A method for preparing a non-glue glass optical fiber bundle for medical endoscope illumination, characterized in that: The preparation device comprising any one of claims 1 to 6, wherein the specific steps are as follows: Step 1) Material preparation: select the number of optical fiber strands according to the number of inner cores, then use an alcohol lamp to burn one end of the optical fiber strand to remove the coating, soak the burned optical fiber strand in a beaker of sulfuric acid to remove impurities, rinse the optical fiber soaked in sulfuric acid with clean water, blow dry with an air gun, and finally wipe with clean paper dipped in alcohol for later use; then put the quartz tube into an ultrasonic machine filled with alcohol for cleaning, and then blow dry with an air gun for later use; Step 2) inserting the uncoated end of the spare optical fiber into the spare quartz tube; firstly, the uncoated end of the optical fiber is placed against a flat plate to level the end, and then the optical fiber is bundled with a thin wire to ensure that the bundle is dense, and then the uncoated end is inserted into the quartz tube and at least to the other end, and then the thin wire is removed; Step 3) Melting preparation: fix the two ends of the quartz tube after the tube is threaded on the upper drill clamp and the lower drill clamp of the preparation device, then start the rotary motor, the upper drill clamp and the lower drill clamp rotate synchronously at a uniform speed, then turn on the hydrogen and oxygen machine, and use the igniter to ignite the flame gun for standby use; Step 4) Melting: Aim the flame of the flame gun straight or obliquely at the lower end of the sleeve and keep a proper distance. First, preheat the middle and lower part of the quartz tube evenly to quickly discharge water vapor. After the preheating is completed, continue to melt the quartz tube with an external flame. After the middle part of the quartz tube softens, the lower drill bit clamp is fixed and the upper drill bit clamp is rotated at a certain angle to twist the quartz tube. After the deformation is completed, continue to keep warm for at least 5 minutes and slowly cool to room temperature until the stress is completely released; Step 6) The torsional deformation part is cut off from the middle, and then the cut end surface is ground and polished to obtain the finished product.

8. The method for preparing a non-glue glass optical fiber bundle for medical endoscope illumination according to claim 7, characterized in that: The heating temperature of the flame gun is at least 600 degrees; the rotation angle of the upper drill bit clamp is 10-15 degrees.

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