A new type of casing raw material heating and conveying device

Abstract

The utility model relates to a novel casing pipe type raw material heating conveying device, include: inner layer raw material pipe, heating mechanism, temperature control mechanism, outer layer sleeve and control module, heating mechanism is gridlike structure, its fixedly sleeved in the outer of inner layer raw material pipe, and the both ends of inner layer raw material pipe respectively extend to the both ends of heating mechanism outside, temperature control mechanism installs on heating mechanism, and it and heating mechanism are connected with control module communication respectively, outer layer sleeve fixedly sleeved in heating mechanism outside. The utility model has the advantages of simple structure, reasonable in design, heating stability in synchronous movement, long service life, can continuously and stably move for a long time under the high temperature condition of deposition process, effectively improves deposition stability, and effectively improves the yield rate of deposition process simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber preform manufacturing technology, specifically to a novel sleeve-type raw material heating and conveying device. Background Technology

[0002] Optical fiber preforms are the fundamental material for optical fiber communication. Their origins can be traced back to the 1960s, when researchers began studying the use of light to transmit information in order to solve the problem of long-distance communication. After years of research and practice, it was discovered that glass rods manufactured using special processes could effectively transmit optical signals; this was the prototype of the optical fiber preform.

[0003] The working principle of optical fiber preforms is mainly based on total internal reflection. When light enters a low-refractive-index medium from a high-refractive-index medium, total internal reflection will occur at the interface if the angle of incidence is greater than the critical angle. The interior of the optical fiber preform is high-refractive-index glass, and the exterior is a low-refractive-index cladding. Therefore, when light propagates from the inside to the outside, as long as the angle of incidence is greater than the critical angle, total internal reflection can be achieved, thus enabling long-distance light transmission.

[0004] The key parameters of optical fiber preforms include diameter, length, refractive index, and loss. Diameter and length determine the physical dimensions of the preform, refractive index determines the light transmission efficiency, and loss determines the transmission distance. Generally, optical fiber preforms with larger diameters, longer lengths, higher refractive indices, and lower losses exhibit better performance.

[0005] Fiber optic preforms are widely used in fiber optic communication, fiber optic sensing, and medical devices. In fiber optic communication, fiber optic preforms are used to fabricate optical fibers, enabling long-distance information transmission; in fiber optic sensing, fiber optic preforms are used to fabricate fiber optic sensors, enabling environmental monitoring; and in medical devices, fiber optic preforms are used to fabricate fiber optic endoscopes, enabling observation of the human body's interior.

[0006] Based on manufacturing processes, optical fiber preforms can be mainly divided into chemical vapor deposition (CVD) preforms and physical vapor deposition (PVD) preforms; based on applications, they can be divided into communication preforms and sensing preforms. With technological advancements, the manufacturing processes for optical fiber preforms will become more refined, resulting in superior performance. In the future, optical fiber preforms will be applied in more fields, such as quantum communication and biomedicine.

[0007] In the manufacturing process of optical fiber preforms, the OVD (Outside Vapor Deposition) or VAD (Vapor-phase Axial Deposition) method involves depositing a porous material on the outside of the preform using a deposition torch. The silicon tetrachloride material sprayed from the torch is deposited on the preform. The entire deposition process requires strict temperature control of the silicon tetrachloride material. Utility Model Content

[0008] This utility model addresses the technical problems existing in the prior art by providing a novel sleeve-type raw material heating and conveying device.

[0009] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A novel sleeve-type raw material heating and conveying device includes: an inner raw material tube, a heating mechanism, a temperature control mechanism, an outer sleeve, and a control module. The heating mechanism has a grid-like structure and is fixedly sleeved outside the inner raw material tube, with both ends of the inner raw material tube extending to the ends of the heating mechanism. The temperature control mechanism is mounted on the heating mechanism and is communicatively connected to the control module, along with the heating mechanism. The outer sleeve is fixedly sleeved outside the heating mechanism.

[0010] The beneficial effects of this utility model are: during operation, the entire device moves back and forth along its own axis, while the raw material flows through the inner raw material pipe; During this process, the heating mechanism is used to heat the raw material in the inner raw material tube, and the temperature control mechanism is used to monitor the temperature of the raw material in the inner raw material tube in real time and send the corresponding temperature signal to the control module. The control module receives the corresponding temperature signal and performs judgment and analysis. When the temperature of the raw material is higher than the set temperature threshold, the control module controls the heating mechanism to stop heating the raw material; when the temperature of the raw material is lower than the set temperature threshold, the control module controls the heating mechanism to heat the raw material to meet the temperature requirements of silicon tetrachloride.

[0011] This utility model has a simple structure and reasonable design. It is stable in heating during synchronous movement and has a long service life. It can continuously and stably move for a long time under high temperature conditions in the deposition process, effectively improving deposition stability and improving the yield of the deposition process.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, sealing mechanisms are installed at both ends of the outer sleeve.

[0014] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. By using two sealing mechanisms to seal both ends of the outer sleeve, the sealing performance of both ends of the outer sleeve is further increased, heat loss is avoided, and the sealing effect is further achieved.

[0015] Furthermore, each of the two sealing mechanisms includes a silicone telescopic sleeve, and the two silicone telescopic sleeves are respectively fitted over both ends of the outer sleeve.

[0016] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. By using two silicone telescopic sleeves to seal both ends of the outer sleeve, the sealing performance of both ends of the outer sleeve is further increased, heat loss is avoided, and the sealing effect is further achieved. In addition, it is more reasonable to use a silicone telescopic sleeve for the sealing mechanism. The telescopic properties of the silicone telescopic sleeve can better seal the end of the outer sleeve, further increasing the sealing performance of the end of the outer sleeve.

[0017] Furthermore, sealing adhesive is provided between the two silicone telescopic sleeves and the two ends of the outer sleeve.

[0018] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The sealing performance of the silicone telescopic sleeve is increased by using sealing glue, thereby further increasing the sealing performance of the outer sleeve end.

[0019] Furthermore, each of the two silicone telescopic sleeves is connected to a leak-proof exhaust pipe. The two leak-proof exhaust pipes are used to connect to a negative pressure discard pipe, and when a gas detector nearby detects an HCl gas leak, the leak-proof exhaust pipes begin to exhaust gas.

[0020] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable, and it solves the problem of heat pipe leakage and acid gas overflow: the end caps are designed with anti-leakage extraction pipes, which are connected to the negative pressure exhaust pipe. The switching control is achieved through a solenoid valve and a pneumatic valve, and is linked with the gas detector signal. When the nearby gas detector detects HCl gas leakage, it will trigger a signal, and the anti-leakage extraction pipe at the end cap will start to exhaust gas.

[0021] Furthermore, an inner protective layer is installed between the inner raw material pipe and the heating mechanism.

[0022] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The inner protective layer can protect the inner raw material pipe during the entire equipment movement process. In addition, the inner protective layer can isolate moisture and resist chemical corrosion and maintain heat preservation performance.

[0023] Furthermore, an insulation layer is installed between the heating mechanism and the outer sleeve.

[0024] The advantages of adopting the above-mentioned further solutions are that the structure is simple, the design is reasonable, the insulation layer design protects the overall heating sleeve temperature from external interference, and it is temperature and corrosion resistant with low flammability.

[0025] Furthermore, a filter is installed at the feed end of the inner raw material pipe.

[0026] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and the filter solves the problem of filtering impurities and preventing blockages during raw material transportation. It is also easy to maintain, has a long service life, and is low in cost.

[0027] Furthermore, the outer sleeve is an aramid fiber tube.

[0028] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and the outer sleeve is made of aramid fiber mesh, which is resistant to high temperature, corrosion, and friction, has a long service life, and low cost.

[0029] Furthermore, the inner raw material tube is a PFA tube.

[0030] The advantages of adopting the above-mentioned further solution are that it has a simple structure, reasonable design, and the inner raw material pipe is made of PFA pipe, which has excellent corrosion resistance, long service life, and low cost. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the middle structure of this utility model; Figure 4 This is a schematic diagram of the end structure of this utility model; Figure 5 This is a schematic diagram of the sealing mechanism in this utility model.

[0032] The attached diagram lists the components represented by each number as follows: 1. Inner raw material pipe; 2. Heating mechanism; 3. Temperature control mechanism; 4. Outer sleeve; 5. Silicone telescopic sleeve; 6. Sealing sealant; 7. Leak-proof exhaust pipe; 8. Inner protective layer; 9. Insulation layer; 10. Filter. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0036] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0037] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] Example 1 like Figures 1 to 5 As shown, this embodiment provides a novel sleeve-type raw material heating and conveying device, including: an inner raw material tube 1, a heating mechanism 2, a temperature control mechanism 3, an outer sleeve 4, and a control module. The heating mechanism 2 has a mesh-like structure and is fixedly sleeved outside the inner raw material tube 1, with both ends of the inner raw material tube 1 extending to the ends of the heating mechanism 2. The temperature control mechanism 3 is installed on the heating mechanism 2, and it and the heating mechanism 2 are respectively communicatively connected to the control module. The outer sleeve 4 is fixedly sleeved outside the heating mechanism 2.

[0039] During operation, the entire device reciprocates along its own axis while the raw material flows through the inner raw material pipe 1. During this process, the heating mechanism 2 is used to heat the raw material in the inner raw material tube 1, and the temperature control mechanism 3 is used to monitor the temperature of the raw material in the inner raw material tube 1 in real time and send the corresponding temperature signal to the control module. The control module receives the corresponding temperature signal and performs judgment and analysis. When the temperature of the raw material is higher than the set temperature threshold, the control module controls the heating mechanism 2 to stop heating the raw material; when the temperature of the raw material is lower than the set temperature threshold, the control module controls the heating mechanism 2 to heat the raw material to meet the temperature requirements of silicon tetrachloride.

[0040] Based on the above scheme, the raw material flowing through the inner raw material pipe 1 is silicon tetrachloride. Silicon tetrachloride is liquid at room temperature and has a boiling point of 58°C. The process requires silicon tetrachloride to be in a gaseous state, so the inner raw material pipe 1, which serves as the conveying pipeline, needs to maintain a temperature of around 90°C to keep the silicon tetrachloride in a stable gaseous state.

[0041] Preferably, in this embodiment, the inner raw material tube 1 is a circular tube.

[0042] Preferably, in this embodiment, the heating mechanism 2 is a mesh-shaped heating mesh, which is directly and fixedly sleeved on the outside of the inner raw material pipe 1.

[0043] Heating mechanism 2 adopts a mesh-type heating sleeve layer structure to solve the problem of uniform heating in reciprocating raw material pipelines: The heating mechanism 2 is designed with a glass fiber fixed mesh, which is mixed with the heating resistance wire in a mesh pattern to form a sleeve. The mesh spacing is maintained at 8mm. The mesh heating sleeve layer can maintain a stable spacing and not shift during the reciprocating movement of the pipeline, thereby achieving uniform heating of the entire pipeline.

[0044] In addition, the mesh heating sleeve layer has the advantages of bend resistance and long service life, and low cost.

[0045] Traditional heating mechanisms use heating tubes that are spirally wound around the inner raw material tube 1. Because the entire device needs to move back and forth during operation, the spiral heating tubes are prone to relative displacement with the inner raw material tube 1, making it impossible to guarantee the uniformity of heating the inner raw material tube 1.

[0046] Preferably, in this embodiment, the temperature control mechanism 3 is preferably a temperature sensor, which is fixedly installed on the heating mechanism 2 to monitor the heating temperature of the heating mechanism 2 in real time.

[0047] In addition, the temperature sensor mentioned above is preferably the PT100 temperature sensor in the prior art, with an external PFA (soluble polytetrafluoroethylene) insulating layer.

[0048] Based on the above scheme, the heating mechanism 2 and the temperature sensor are connected to the control module through circuits, and the multiple circuits are wrapped with insulating sheaths, making them neat and aesthetically pleasing.

[0049] This embodiment has a simple structure and reasonable design. It is stable in heating during synchronous movement and has a long service life. It can continuously and stably move for a long time under high temperature conditions in the deposition process, effectively improving deposition stability and improving the yield of the deposition process.

[0050] Example 2 Based on Example 1, in this example, sealing mechanisms are installed at both ends of the outer sleeve 4.

[0051] The scheme has a simple structure and reasonable design. It uses two sealing mechanisms to seal both ends of the outer sleeve 4, which further increases the sealing performance of both ends of the outer sleeve 4, prevents heat loss, and further enhances the sealing effect.

[0052] Example 3 Based on Embodiment 2, in this embodiment, the two sealing mechanisms each include a silicone telescopic sleeve 5, and the two silicone telescopic sleeves 5 are respectively fitted over both ends of the outer sleeve 4.

[0053] The solution has a simple structure and reasonable design. It uses two silicone telescopic sleeves 5 to seal both ends of the outer sleeve 4, which further increases the sealing performance of both ends of the outer sleeve 4, prevents heat loss, and further enhances the sealing effect. In addition, it is more reasonable to use silicone telescopic sleeve 5 for sealing mechanism. The telescopic characteristics of silicone telescopic sleeve 5 can better seal the end of outer sleeve 4 and further increase the sealing performance of the end of outer sleeve 4.

[0054] Example 4 Based on Example 3, in this example, sealing adhesive 6 is provided between the two ends of the silicone telescopic sleeves 5 and the outer sleeve 4.

[0055] The solution has a simple structure and reasonable design. It uses sealing glue 6 to increase the sealing performance of the silicone telescopic sleeve, thereby further increasing the sealing performance of the outer sleeve 4.

[0056] Alternatively, a rubber sealing ring can be used instead of the sealing adhesive 6 mentioned above, which can also achieve a good sealing effect.

[0057] Example 5 Based on any one of Embodiments 3 to 4, in this embodiment, the two silicone telescopic sleeves 5 are respectively connected to a leak-proof exhaust pipe 7. The two leak-proof exhaust pipes 7 are respectively used to connect to a negative pressure discard pipe, and when a nearby gas detector detects an HCl gas leak, the leak-proof exhaust pipe 7 begins to exhaust gas.

[0058] The solution has a simple structure and reasonable design, which solves the problem of heat pipe leakage and acid gas overflow: the two ends are designed with anti-leakage extraction pipes 7, which are connected to the negative pressure exhaust pipe. The switch is controlled by a solenoid valve and a pneumatic valve, and is linked with the gas detector signal.

[0059] When a nearby gas detector detects an HCl gas leak, it will trigger a signal, and the leak-proof exhaust pipe at the seal will begin to expel gas.

[0060] Example 6 Based on the above embodiments, in this embodiment, an inner protective layer 8 is installed between the inner raw material pipe 1 and the heating mechanism 2.

[0061] The scheme has a simple structure and reasonable design. The inner protective layer 8 can protect the inner raw material pipe 1 during the movement of the entire equipment. In addition, the inner protective layer 8 can isolate moisture and resist chemical corrosion and maintain heat preservation performance.

[0062] Example 7 Based on the above embodiments, in this embodiment, a heat insulation layer 9 is installed between the heating mechanism 2 and the outer sleeve 4.

[0063] The solution has a simple structure and reasonable design. The insulation layer 9 protects the overall heating sleeve temperature from external interference and is temperature and corrosion resistant with low flammability.

[0064] Preferably, in this embodiment, the insulation layer 9 is designed as a foamed silicone rubber insulation layer, which is temperature and corrosion resistant and has low flammability.

[0065] Example 8 Based on the above embodiments, in this embodiment, a filter 10 is installed at the feed end of the inner raw material pipe 1.

[0066] The solution has a simple structure and reasonable design. The filter 10 solves the problem of filtering impurities and preventing blockages during raw material transportation. It is easy to maintain, has a long service life, and is low in cost.

[0067] Preferably, in this embodiment, the filter 10 adopts a micro-filtration structure in the prior art to filter impurities and prevent clogging, and adopts a straight-through filtration to facilitate subsequent maintenance.

[0068] Example 9 Based on the above embodiments, in this embodiment, the outer sleeve 4 is an aramid fiber tube.

[0069] The scheme has a simple structure and reasonable design. The outer sleeve 4 is made of aramid fiber mesh, which is resistant to high temperature, corrosion, and friction, has a long service life, and is low in cost.

[0070] Example 10 Based on the above embodiments, in this embodiment, the inner raw material pipe 1 is a PFA pipe.

[0071] The scheme has a simple structure and reasonable design. The inner raw material pipe 1 is made of PFA pipe, which has excellent corrosion resistance, long service life and low cost.

[0072] The working principle of this utility model is as follows: During operation, the entire device reciprocates along its own axis while the raw material flows through the inner raw material pipe 1. During this process, the heating mechanism 2 is used to heat the raw material in the inner raw material tube 1, and the temperature control mechanism 3 is used to monitor the temperature of the raw material in the inner raw material tube 1 in real time and send the corresponding temperature signal to the control module. The control module receives the corresponding temperature signal and performs judgment and analysis. When the temperature of the raw material is higher than the set temperature threshold, the control module controls the heating mechanism 2 to stop heating the raw material; when the temperature of the raw material is lower than the set temperature threshold, the control module controls the heating mechanism 2 to heat the raw material to meet the temperature requirements of silicon tetrachloride.

[0073] This utility model provides a novel sleeve-type raw material heating and conveying device. The device has a simple structure and reasonable design. It is stable in heating during synchronous movement, has a long service life, and can continuously and stably move for a long time under high temperature conditions in the deposition process, effectively improving deposition stability and improving the yield of the deposition process.

[0074] The key to this invention lies in its multi-layered integrated design, with the raw material housed within an isolation tube. Each layer of the device possesses uniquely designed features for stable heating and easy movement. This device allows for continuous and stable long-term movement during the high-temperature deposition process, effectively improving deposition stability.

[0075] The advantages of this utility model are: This study aims to develop technologies that can effectively improve deposition stability in the OVD (Oil-Vacuum Deposition) process, and to investigate factors such as the deposition process, equipment, and environment involved in OVD. During OVD manufacturing, the stability of the transport of deposition materials has a significant impact on the stability of the product manufacturing process.

[0076] Traditional raw material heating simply involves wrapping a heating tape around the outside of the raw material pipeline. This method is prone to problems such as the heating tape falling off, uneven heating spacing, and easy wear of the heating tape on continuously moving pipelines.

[0077] This utility model features a multi-layered integrated design. The raw material is housed in an inner isolation tube, while the heating mechanism, insulation layer, and outer sleeve are located on the outer layer. The inner layer is a hollow raw material tube, with protective devices designed layer by layer from the inside out. Each layer, including the heating mechanism, insulation layer, and outer sleeve, has a unique design for stable heating and easy movement. This device provides stable heating during synchronous movement, has a long service life, and can operate continuously and stably for extended periods under high-temperature conditions in the deposition process, effectively improving deposition stability and increasing the yield of the deposition process.

[0078] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A novel sleeve-type raw material heating and conveying device, characterized in that, include: The inner raw material tube (1), heating mechanism (2), temperature control mechanism (3), outer sleeve (4) and control module are provided. The heating mechanism (2) has a grid structure and is fixedly sleeved outside the inner raw material tube (1). Both ends of the inner raw material tube (1) extend to the ends of the heating mechanism (2). The temperature control mechanism (3) is installed on the heating mechanism (2) and is connected to the control module. The outer sleeve (4) is fixedly sleeved outside the heating mechanism (2).

2. The novel sleeve-type raw material heating and conveying device according to claim 1, characterized in that, The outer sleeve (4) is equipped with sealing mechanisms at both ends.

3. The novel sleeve-type raw material heating and conveying device according to claim 2, characterized in that, The two sealing mechanisms each include a silicone telescopic sleeve (5), and the two silicone telescopic sleeves (5) are respectively fitted over both ends of the outer sleeve (4).

4. The novel sleeve-type raw material heating and conveying device according to claim 3, characterized in that, Sealing adhesive (6) is provided between the two ends of the silicone telescopic sleeves (5) and the outer sleeve (4).

5. The novel sleeve-type raw material heating and conveying device according to claim 3, characterized in that, The two silicone telescopic sleeves (5) are respectively connected to anti-leakage suction pipes (7). The two anti-leakage suction pipes (7) are respectively used to connect to the negative pressure discard pipe. When the gas detector in the vicinity detects HCl gas leakage, the anti-leakage suction pipes (7) start to exhaust gas.

6. The novel sleeve-type raw material heating and conveying device according to any one of claims 1-5, characterized in that, An inner protective layer (8) is installed between the inner raw material pipe (1) and the heating mechanism (2).

7. The novel sleeve-type raw material heating and conveying device according to any one of claims 1-5, characterized in that, A heat insulation layer (9) is installed between the heating mechanism (2) and the outer sleeve (4).

8. The novel sleeve-type raw material heating and conveying device according to any one of claims 1-5, characterized in that, A filter (10) is installed at the feed end of the inner raw material pipe (1).

9. The novel sleeve-type raw material heating and conveying device according to any one of claims 1-5, characterized in that, The outer sleeve (4) is an aramid fiber tube.

10. The novel sleeve-type raw material heating and conveying device according to any one of claims 1-5, characterized in that, The inner raw material pipe (1) is a PFA pipe.

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