Assembly device of optical fiber preform

Abstract

The utility model discloses an assembling device of an optical fiber preform. The assembling device comprises a controller, the core rod storage rack is used for placing a plurality of core rods, is provided with a core rod measuring module connected with the controller, and is used for measuring basic parameters of the core rods; the casing pipe roll-over stand is used for placing a casing pipe, is provided with a casing pipe measuring module connected with the controller and is used for measuring basic parameters of the casing pipe; the vacuum suction cup device comprises a vacuum suction cup and is used for sucking a target core rod, and the position of the vacuum suction cup is adjustable; the assembling table is provided with a power mechanism used for driving the vacuum suction cup to move; the air pressure adjusting system is used for adjusting the pressure in the sleeve, it is guaranteed that pollutants entering the sleeve are reduced to the maximum extent in the assembling process, and meanwhile the core rod shakes slightly in the moving process. The problems of pollution of the inner wall of the sleeve and the surface of the core rod, welding pollution of the core rod and assembly scratches in the assembly process are solved, the core rod does not need to be welded, batch production can be achieved, and a new thought is opened for industrial sleeve method assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fiber communication, and in particular relates to an assembly device for optical fiber preform rods. Background Art

[0002] As data traffic continues to grow sharply and technologies such as mobile Internet, cloud computing, and big data develop rapidly, global bandwidth demand has exploded. How to further increase transmission capacity based on 400G transmission signals has become the focus of system operators and equipment manufacturers.

[0003] The assembly of optical fiber preform is an extremely important step before the melting and shrinkage of optical fiber preform. After the pickling and drying of optical fiber preform, the core rod needs to be assembled into the sleeve to form a complete optical fiber preform, and then sent to the drawing process for drawing production. The cleanliness of the inner wall of the sleeve and the surface of the core rod after assembly is extremely critical for wire drawing.

[0004] At present, the G.654.E core rod is usually prepared by vertical assembly. A clamp is used to clamp the external filling rod of the core rod, and a wire rope is used to lift it into the casing. During the lifting process, a Teflon sheet is used to cover the auxiliary pipe opening to prevent impurities from being introduced into the casing. However, this simple operation is difficult to fundamentally prevent the introduction of pollutants. Therefore, a low-pollution assembly device and method are urgently needed to prepare low-defect, high-stability optical fiber.

[0005] In the existing vertical assembly, the core rod is usually butted together by flame, then butted with the filler rod, and then assembled into the casing. Although this improves the assembly efficiency, it introduces the hydroxyl problem. The hydroxyl test found that there was 1-5ppm hydroxyl contamination 70mm before and after the welding surface. The hydroxyl contamination problem cannot be underestimated and is undoubtedly a huge challenge to cost and quality.

[0006] The Chinese patent, publication number CN216972342U, discloses a blowing device for assembling optical fiber preform rods, in which the cap is fixedly connected to the base, and the air inlet provided on the side wall of the cap is connected to the inner side of the device to form an air inlet channel, and the air inlet is connected to the air inlet to achieve the blowing during the assembly of the optical fiber preform rod. Although the above technical solution improves the surface quality of the inner wall of the sleeve and its core rod to a certain extent during use, the improvement is limited, and it is impossible to achieve gas balance in the tube and accurate measurement and control of air pressure.

[0007] At the same time, the sleeve assembly method in the industry is prone to scratches. Usually, the core rod and the filler rod are welded and then assembled vertically to minimize the inner wall assembly scratches. However, this also generates welding flame pollution, which in turn causes poor wire drawing attenuation. The negative effects are obvious.

[0008] In order to solve the above problems, the utility model discloses an assembly device for optical fiber preform rods, which can realize dynamic balance of air pressure in the casing and accurate measurement and control of air pressure, ensure that pollutants entering the casing are minimized during the assembly process, and the core rod is hoisted into the casing through a vacuum suction cup, so as to avoid scratches during the assembly process to the greatest extent, avoid wire drawing pollution problems, and realize mass production. Utility Model Content

[0009] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide an assembly device for optical fiber preform rods.

[0010] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the utility model is:

[0011] An assembly device for an optical fiber preform, comprising:

[0012] Controller;

[0013] A mandrel storage rack is used to place a plurality of mandrels. The mandrel storage rack is provided with a mandrel measuring module connected to a controller for measuring basic parameters of the mandrels.

[0014] A casing turning frame is used to place casings. A casing measuring module connected to a controller is provided on the casing turning frame to measure basic parameters of the casing.

[0015] A vacuum suction cup device, comprising a vacuum suction cup, for sucking the target mandrel, wherein the position of the vacuum suction cup is adjustable;

[0016] An assembly table, wherein a power mechanism for driving the vacuum suction cup to move is arranged on the assembly table;

[0017] The air pressure regulating system is used to adjust the pressure inside the casing to ensure that contaminants entering the casing are minimized during the assembly process, while achieving minimal shaking of the core rod during movement.

[0018] Furthermore, the mandrel measuring module includes a mandrel length scanner and a mandrel gravity sensor, and the mandrel length scanner and the mandrel gravity sensor are respectively connected to the controller.

[0019] Furthermore, the casing measurement module includes a casing length scanner and a casing gravity sensor, and the casing length scanner and the casing gravity sensor are respectively connected to the controller.

[0020] Furthermore, the sleeve flip frame is also provided with a sleeve fixing piece, and there are two sleeve fixing pieces in total, which are coaxially arranged up and down. A slot matching the sleeve is opened in the middle of the sleeve fixing piece. When the sleeve is vertically placed on the sleeve flip frame, the upper and lower ends of the sleeve are stuck in the slot.

[0021] Furthermore, an elastic pad adapted to the sleeve is arranged in the slot.

[0022] Furthermore, the vacuum suction cup device also includes a vacuum pipeline, a pneumatic valve 1, a pneumatic valve 2 and an exhaust port. The pneumatic valve 1 is arranged on the vacuum pipeline. The vacuum suction cup is connected to the vacuum generator through the vacuum pipeline. When the pneumatic valve 1 is opened, the vacuum generator is immediately vacuumed, so that the vacuum suction cup lifts the target core rod and moves it to a suitable position. When the vacuum generator is closed, the pneumatic valve 2 is opened to exhaust air through the exhaust port.

[0023] Furthermore, the power mechanism includes a matching crane and guide rails, the crane is provided with a vacuum suction cup, and the crane is connected to a controller. The controller controls the crane to reciprocate along the guide rails, thereby driving the vacuum suction cup on the crane and the target core rod it sucks to move synchronously.

[0024] Furthermore, a laser probe is also provided on the overhead crane, and the laser probe is connected to the controller. The positions of the target core rod and the casing are scanned by the laser probe and uploaded to the controller.

[0025] Furthermore, the sleeve includes an auxiliary tube I and a filling rod, the auxiliary tube I is assembled with the filling rod and is sealed by an inflatable sealing plug, the inflatable sealing plug is provided with a PFA tube, and the PFA tube is connected to the inside of the auxiliary tube I and the air pressure regulating system.

[0026] Furthermore, the controller is a single chip microcomputer or a PLC.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The utility model discloses an assembly device for optical fiber preform rods, which is mainly aimed at G.654 optical fiber preform rods, and mainly solves and improves the main problems existing in the vertical assembly of the casing method in the industry, which are mainly embodied in the following aspects: by assembling a single core rod inside the casing, the risk of hydroxyl pollution caused by the docking of multiple core rods is broken, the core rod is hoisted into the casing through a vacuum suction cup, and scratches generated during the assembly process are avoided to the greatest extent, and the problem of wire drawing pollution is avoided; the pressure in the casing is adjusted by an air pressure regulating system, and the gas balance in the casing and the accurate measurement and control of the air pressure can be achieved, the weight of the core rod and the casing air pressure seek a balance value, and it is ensured that the pollutants entering the casing are minimized during the assembly of the core rod, and at the same time, the core rod is minimized in the moving process. The pollution of the inner wall of the casing and the surface of the core rod, the pollution of the core rod welding, and the problem of assembly scratches during the assembly process are solved, the core rod does not need to be welded, the operation process is simple, the work efficiency is high, and batch production can be realized, which opens up new ideas for the casing method assembly in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0030] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the mandrel storage rack of the utility model;

[0032] Figure 4 It is a structural schematic diagram of the casing turning frame of the utility model;

[0033] Figure 5 It is a structural schematic diagram of the sleeve of the utility model;

[0034] Figure 6 It is a schematic diagram of the structure after the sleeve and the filling rod of the utility model are assembled;

[0035] Figure 7 It is a schematic structural diagram of the vacuum suction cup device of the present utility model. DETAILED DESCRIPTION

[0036] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0037] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0038] Example 1

[0039] like Figure 1-7 As shown, an assembly device for an optical fiber preform rod comprises:

[0040] Controller, which is a single chip microcomputer or PLC;

[0041] A mandrel storage rack 1 is used to place a plurality of mandrels. A mandrel length scanner 2 and a mandrel gravity sensor 3 are provided on the mandrel storage rack 1 to measure basic parameters of the mandrels.

[0042] The casing flip frame 4 is used to place the casing, and the casing includes an auxiliary tube Ⅰ5 and a filling rod 6. The filling rod 6 is assembled in the auxiliary tube Ⅰ5 and is blocked by an inflatable sealing plug 7. The inflatable sealing plug 7 is provided with a PFA tube 8, and the PFA tube 8 is connected to the inside of the auxiliary tube Ⅰ5 and the air pressure regulating system 9; the casing flip frame 4 is provided with a casing fixing part 10, a casing length scanner 401 and a casing gravity sensor 402, and the casing length scanner 401 and the casing gravity sensor 402 are respectively connected to the controller. There are two casing fixing parts 10, which are coaxially arranged up and down. A card slot adapted to the casing is provided in the middle of the casing fixing part 10. When the casing is placed vertically on the casing flip frame 4, the upper and lower ends of the casing are just stuck in the card slot. An elastic pad that can be large or small and adapted to the casing is provided in the card slot, which is convenient for achieving tight fixation and preventing the casing from falling off;

[0043] The assembly table 100 is provided with a crane 11, a guide rail 12 and a laser probe 13. The controller controls the crane 11 to reciprocate along the guide rail 12, thereby driving the laser probe 13 on the crane 11 to move synchronously. The laser probe 13 starts to scan the position of the target mandrel and uploads it to the controller. After the mandrel scanning and positioning is completed, the laser probe 13 identifies the position information of the inner hole of the casing and uploads it to the controller. While scanning, the actual length and weight of the mandrel and casing can be compared again to see if they are consistent with the information entered into the system;

[0044] The vacuum suction cup device includes a vacuum suction cup 14, a vacuum pumping pipeline 15, a pneumatic valve 16, a pneumatic valve 2 17, and an exhaust port 18. The pneumatic valve 16 is arranged on the vacuum pumping pipeline 15. The vacuum suction cup 14 is connected to the vacuum generator through the vacuum pumping pipeline 15. The controller controls the traveling crane 11 to reciprocate along the guide rail 12, thereby driving the vacuum suction cup 14 on the traveling crane 11 to move to a suitable position, and opening the pneumatic valve 16. The vacuum generator immediately draws a vacuum, so that the vacuum suction cup 14 uses the adsorption force to lift the target core rod, and moves to a suitable position under the drive of the traveling crane 11. The speed of lifting the core rod is 100mm / min. The vacuum state is maintained during the moving process until the core rod is assembled in place and the vacuum generator can be closed. After the vacuum generator is closed, the pneumatic valve 2 17 is opened to exhaust air through the exhaust port 18;

[0045] The air pressure regulating system 9 is used to regulate the pressure inside the casing to ensure that pollutants entering the casing are minimized during the assembly process and that the core rod is minimally shaken during the movement process.

[0046] An assembling method of an optical fiber preform, for a G.654 optical fiber preform, comprises the following steps:

[0047] Step S1, returning the mandrels to the mandrel storage rack 1 in order, the mandrel storage rack 1 being provided with a mandrel length scanner 2 and a mandrel gravity sensor 3;

[0048] Step S2, return the casing to the casing turning frame 4 according to the corresponding position. It should be noted that the casing needs to be assembled according to the following steps before returning: first, assemble the filling rod 6 in the auxiliary pipe I 5, then install the inflatable sealing plug 7 and its corresponding PFA tube 8, and connect the PFA tube 8 to the air pressure regulating system 9. The main function of the air pressure regulating system 9 is to sense the gas pressure in the casing and adjust it to the required pressure value. After the assembly is completed, the casing is lifted to the casing turning frame 4 by the existing crane in the workshop for fixing. After the casing is fixed, the air pressure regulating system 9 is turned on to ensure that the inside of the pipe is clean; the casing turning frame 4 is provided with a casing fixing part 10, a casing length scanner 401 and a casing gravity sensor 402, the casing length scanner 401 and the casing gravity sensor 402 are respectively connected to the controller, there are two casing fixing parts 10, which are coaxially arranged up and down, and a card slot adapted to the casing is provided in the middle of the casing fixing part 10. When the casing is placed vertically on the casing turning frame 4, the upper and lower ends of the casing are just stuck in the card slot, and a large or small elastic pad adapted to the casing is provided in the card slot, which is convenient for achieving tight fixation and preventing the casing from falling off;

[0049] Step S3: Identify whether the target object is consistent with the system input information, specifically:

[0050] The target mandrel length is identified by the mandrel length scanner 2 and uploaded to the controller, the target mandrel weight is identified by the mandrel gravity sensor 3 and uploaded to the controller, the target casing length is identified by the casing length scanner 401 and uploaded to the controller, and the target casing weight is identified by the casing gravity sensor 402 and uploaded to the controller. The controller compares the received target mandrel length, target mandrel weight, target casing length, and target casing weight with the system input information respectively. Step S4 can be performed only if the information is consistent, otherwise the cause is found and solved and improved;

[0051] Step S4: Identify the location of the target mandrel and casing and accurately locate them, specifically:

[0052] The controller controls the crane 11 on the assembly table 100 to reciprocate along the guide rail 12, thereby driving the laser probe 13 on the crane 11 to move synchronously, and the laser probe 13 scans the position of the target mandrel and uploads it to the controller, and the laser probe 13 scans and identifies the position information of the inner hole of the casing and uploads it to the controller;

[0053] Step S5, the vacuum suction cup device lifts the target mandrel and starts moving along a preset route;

[0054] Step S6: After the target mandrel is moved to the top of the casing, the pressure in the casing is adjusted by the air pressure regulating system, and the weight of the mandrel and the air pressure of the casing seek a balance value to ensure that the contaminants entering the casing are minimized during the assembly of the mandrel, and at the same time, the mandrel is minimally shaken during the movement process;

[0055] Step S7: After the core rod reaches the target position, the vacuum suction cup device stops working, and the airflow gradually decreases. Then the vacuum suction cup 14 returns along the original path, and this cycle is repeated to complete the assembly of all core rods.

[0056] In step S1, according to the system assembly list, the mandrel to be assembled is placed in a specified position of the mandrel storage rack 1, and a corresponding QR code is affixed to facilitate subsequent scanning and identification.

[0057] In step S2, according to the system assembly list, the casing is placed at a specified position of the casing turning rack 4, and a corresponding QR code is affixed to facilitate subsequent scanning and identification.

[0058] In step S2, the air pressure regulating system 9 includes:

[0059] A pressure collection module, preferably a barometer, is used to collect the gas pressure in the casing in real time;

[0060] A data processing module is used to process the gas pressure value in the casing collected by the pressure collection module to obtain the speed of pressure value change;

[0061] The pressure regulating module, preferably a stepping motor, is used to receive instructions sent by the data processing module and adjust the gas pressure in the casing to a required pressure value according to the instructions.

[0062] In the utility model, the n groups of pressure data collected by the pressure collection module are subjected to least square curve fitting by the data processing module to establish a function model of the change of air pressure P with time t. The model is expressed as:

[0063]

[0064] Where n is the degree of the polynomial; B = {b0, b1…b n}, are the coefficients of the polynomial;

[0065] Then the pressure change rate function model is obtained, which is expressed as:

[0066]

[0067] Therefore, the gas pressure in the casing is regulated according to the value of the gas pressure change rate function model at each time point, thereby improving the accuracy of pressure regulation.

[0068] In step S4, the assembly table 100 is provided with a crane 11, a guide rail 12 and a laser probe 13. The controller controls the crane 11 to reciprocate along the guide rail 12, thereby driving the laser probe 13 on the crane 11 to move synchronously. The laser probe 13 begins to scan the position of the target mandrel and uploads it to the controller. After the mandrel scanning and positioning is completed, the laser probe 13 identifies the position information of the inner hole of the casing and uploads it to the controller. While scanning, the actual length and weight of the mandrel and casing can be compared again to see if they are consistent with the system input information.

[0069] In step S5, the vacuum suction cup device includes a vacuum suction cup 14, a vacuum pumping pipeline 15, a pneumatic valve 16, a pneumatic valve 2 17, and an exhaust port 18. The pneumatic valve 16 is arranged on the vacuum pumping pipeline 15. The vacuum suction cup 14 is connected to the vacuum generator through the vacuum pumping pipeline 15. The controller controls the traveling crane 11 to reciprocate along the guide rail 12, thereby driving the vacuum suction cup 14 on the traveling crane 11 to move to a suitable position, and opening the pneumatic valve 16. The vacuum generator is immediately vacuumed, so that the vacuum suction cup 14 uses the adsorption force to lift the target core rod, and moves to a suitable position under the drive of the traveling crane 11. The moving speed of the lifting core rod is 100mm / min. The vacuum state is maintained during the moving process until the core rod is assembled in place and the vacuum generator can be closed. After the vacuum generator is closed, the pneumatic valve 2 17 is opened to exhaust air through the exhaust port 18.

[0070] In step S6, when the mandrel is hoisted into the auxiliary pipe II 19 at a speed of 30 mm / min, the air pressure regulating system 9 starts to work and automatically adjusts the gas pressure. The working principle of the air pressure regulating system 9 is: when the mandrel is not assembled, the gas pressure in the casing detected by the pressure sensor or electronic pressure gauge of the air pressure regulating system 9 is p = 2.5Psi. When the mandrel enters the auxiliary pipe II 19, the pressure in the casing detected by the pressure sensor or electronic pressure gauge will increase, and the air pressure regulating system 9 starts to exhaust to ensure that the gas pressure in the pipe is maintained at p, and this is repeated until the entire operation is completed. This step has three aspects: 1) Ensure that the mandrel has minimal shaking during the downward movement; 2) Ensure that no contaminants enter the pipe; 3) Increase the buffer when the mandrel moves to the target position to avoid collision with the filling rod to produce debris.

[0071] In step S7, when the mandrel is about to reach the specified position within 50 mm, the assembly speed slows down. When the target assembly position is reached, the vacuum suction cup 14 begins to loosen, and the air pressure regulating system adjusts the pressure again, and the vacuum suction cup 14 returns along the original route at a speed of 200 mm / min.

[0072] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0073] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An assembly device for an optical fiber preform, characterized in that: include: Controller; A mandrel storage rack is used to place a plurality of mandrels. The mandrel storage rack is provided with a mandrel measuring module connected to a controller for measuring basic parameters of the mandrels. A casing turning frame is used to place casings. A casing measuring module connected to a controller is provided on the casing turning frame to measure basic parameters of the casing. A vacuum suction cup device, comprising a vacuum suction cup, for sucking the target mandrel, wherein the position of the vacuum suction cup is adjustable; An assembly table, wherein a power mechanism for driving the vacuum suction cup to move is arranged on the assembly table; The air pressure regulating system is used to adjust the pressure inside the casing to ensure that contaminants entering the casing are minimized during the assembly process, while achieving minimal shaking of the core rod during movement.

2. The optical fiber preform assembly device according to claim 1, characterized in that: The mandrel measuring module comprises a mandrel length scanner and a mandrel gravity sensor, and the mandrel length scanner and the mandrel gravity sensor are respectively connected to the controller.

3. The optical fiber preform assembly device according to claim 1, characterized in that: The casing measurement module comprises a casing length scanner and a casing gravity sensor, and the casing length scanner and the casing gravity sensor are respectively connected to the controller.

4. The optical fiber preform assembly device according to claim 1, characterized in that: The sleeve flip frame is also provided with a sleeve fixing piece, and there are two sleeve fixing pieces in total, which are coaxially arranged up and down. A slot matching the sleeve is opened in the middle of the sleeve fixing piece. When the sleeve is vertically placed on the sleeve flip frame, the upper and lower ends of the sleeve are stuck in the slot.

5. The optical fiber preform assembly device according to claim 4, characterized in that: An elastic pad matched with the sleeve is arranged in the clamping groove.

6. The optical fiber preform assembly device according to claim 1, characterized in that: The vacuum suction cup device also includes a vacuum pipeline, a pneumatic valve 1, a pneumatic valve 2 and an exhaust port. The pneumatic valve 1 is arranged on the vacuum pipeline. The vacuum suction cup is connected to the vacuum generator through the vacuum pipeline. When the pneumatic valve 1 is opened, the vacuum generator is immediately vacuumed, so that the vacuum suction cup lifts the target core rod and moves to a suitable position. When the vacuum generator is closed, the pneumatic valve 2 is opened to exhaust air through the exhaust port.

7. The optical fiber preform assembly device according to claim 1, characterized in that: The power mechanism includes a matching crane and guide rails, a vacuum suction cup is provided on the crane, and the crane is connected to a controller. The controller controls the crane to reciprocate along the guide rails, thereby driving the vacuum suction cup on the crane and the target core rod sucked by the crane to move synchronously.

8. The optical fiber preform assembly device according to claim 7, characterized in that: The traveling crane is also provided with a laser probe, which is connected to the controller. The positions of the target core rod and the casing are scanned by the laser probe and uploaded to the controller.

9. The optical fiber preform assembly device according to claim 1, characterized in that: The sleeve includes an auxiliary tube I and a filling rod. The filling rod is assembled in the auxiliary tube I and is sealed by an inflatable sealing plug. A PFA tube is arranged on the inflatable sealing plug. The PFA tube is connected to the inside of the auxiliary tube I and the air pressure regulating system.

10. The optical fiber preform assembly device according to claim 1, characterized in that: The controller is a single chip microcomputer or a PLC.

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