Solid material sublimation evaporator device and optical fiber preparation system

Abstract

The invention discloses a solid material sublimation evaporator device and an optical fiber preparation system, and relates to the technical field of optical fiber preparation. The evaporation device comprises a material disc set, an air inlet pipe and an air outlet pipe, the material disc set comprises an annular cover plate, a first annular disc and a second annular disc which are sequentially stacked and arranged in a clearance sealing mode, and an inner annular hole of the annular cover plate, an inner annular hole of the first annular disc and an inner annular hole of the second annular disc are communicated. A first groove is formed in the side, facing the annular cover plate, of the first annular disc, a second groove is formed in the side, facing the annular cover plate, of the second annular disc, a first through hole is formed in the annular cover plate, and the air inlet pipe penetrates through the first through hole and can be communicated with the first groove; a first groove is formed in the first annular disc, a first hole penetrating through the first annular disc is formed in the groove bottom of the first groove, the first groove is communicated with the second groove through the first hole, a second hole penetrating through the second annular disc is formed in the second groove, and the second hole can be communicated with the air outlet pipe. The technical problem that an existing evaporator device is poor in evaporation effect is solved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber preparation, and in particular to a solid material sublimation evaporator device and an optical fiber preparation system. Background Art

[0002] Rare earth doped active optical fiber is the core component of current fiber lasers. There are two main types of rare earth doped active optical fiber preparation processes: 1. MCVD + solution method; 2. MCVD + high temperature vapor phase method (CDS). The high temperature vapor phase method uses online doping of solid materials, which is more efficient than the solution method and has better control over product stability. The high temperature vapor phase method heats solid rare earth chelates and other related solid materials into steam, and brings the steam into the reaction tube with He carrier gas. The core component of rare earth doping is the high temperature evaporation system of solid materials. How to ensure the stable evaporation pressure and flow rate of solid materials is the key to the preparation of rare earth doped active optical fiber.

[0003] The traditional solid material evaporator is disc-shaped, and multiple discs can be stacked. There is a small amount of material in each disc. The discs are stacked together and placed in a metal protective shell. The main function of the metal shell is to isolate the internal and external atmospheres to protect the sealing of the evaporator. The entire metal shell is placed in a heating chamber. As the chamber is heated, the temperature of the evaporator rises, and the material evaporates and the steam enters the reaction tube with the carrier gas to react. Due to the need for temperature stability, the size of the disc is subject to relatively large restrictions, and its material loading capacity is correspondingly very small; at the same time, because the flow route of the carrier gas is carried out from the entire surface of the disc, there is no fixed gas route, and the carrier gas effect is also unstable. Summary of the invention

[0004] In view of this, the present invention provides a solid material sublimation evaporator device and an optical fiber preparation system, which are used to solve the technical problem of poor effect of the solid material evaporator device.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution:

[0006] A solid material sublimation evaporator device, the evaporation device includes a material tray group, an air inlet pipe and an air outlet pipe, the material tray group includes an annular cover plate, a first annular plate and a second annular plate stacked in sequence and gap-sealed, the inner annular hole of the annular cover plate, the inner annular hole of the first annular plate and the inner annular hole of the second annular plate are connected, the first annular plate is provided with a first groove on the side facing the annular cover plate, the second annular plate is provided with a second groove on the side facing the annular cover plate, the annular cover plate is provided with a first through hole, the air inlet pipe is passed through the first through hole and can be connected with the first groove; the bottom of the first groove is provided with a first hole that penetrates the first annular plate, the first hole connects the first groove with the second groove, the grass of the second groove is provided with a second hole that penetrates the second annular plate, and the second hole can be connected with the air outlet pipe.

[0007] In some embodiments of the solid material sublimation evaporator device, the outer diameter of the first annular disk is the same as the outer diameter of the second annular disk, the inner diameter of the first annular disk is the same as the inner diameter of the second annular disk, and the central axes of the first annular disk and the second annular disk are arranged to coincide.

[0008] In some embodiments of the solid material sublimation evaporator device, a first boss is provided at the bottom of the first groove corresponding to the position of the first hole, and the first hole passes through the first boss; and / or a second boss is provided at the bottom of the second groove corresponding to the position of the second hole, and the second hole passes through the second boss.

[0009] In some embodiments of the solid material sublimation evaporator device, the bottom of the first groove is spirally arranged around the inner ring hole of the first annular disk to have a first end, a second end, and an extended groove section connecting the first end and the second end, the air inlet pipe is connected to the first end, and the opening position of the first hole is located inside the second end;

[0010] And / or, the bottom of the second groove is spirally arranged around the inner ring hole of the second annular disk to have a third end, a fourth end and an extended groove section connecting the third end and the fourth end, the first hole is connected to the third end, and the opening position of the second hole is located inside the fourth end.

[0011] In some embodiments of the solid material sublimation evaporator device, the number of the first annular disks is two, the second annular disk is arranged between the two first annular disks, and the first hole on the first annular disk away from the annular cover plate is connected to the gas outlet pipe;

[0012] Alternatively, the number of the first annular disk and the number of the second annular disk are both plural, and they are stacked in an arrangement of the first annular disk, the second annular disk, and the first annular disk.

[0013] In some embodiments of the solid material sublimation evaporator device, sealing sheets are provided between the annular cover plate and the first annular disk and between the first annular disk and the second annular disk.

[0014] In some embodiments of the solid material sublimation evaporator device, a plurality of strip holes penetrating the sealing sheet are provided at the groove position corresponding to the annular disk on the sealing sheet to form a mesh structure of the sealing sheet, and the orthographic projection of the inner wall of the strip holes toward the bottom surface of the groove is located within the bottom surface of the groove.

[0015] In some embodiments of the solid material sublimation evaporator device, the annular cover plate is further provided with a second through hole penetrating the annular cover plate, and the evaporator device also includes a temperature measuring element and a container, the container is penetrated through the second through hole and extends into the first groove, and the temperature measuring element is accommodated in the container.

[0016] In some embodiments of the solid material sublimation evaporator device, the evaporator device further includes a heating control module and a temperature detection element, the temperature detection element is used to detect the temperature of the outer wall of the tray group, the heating control module is communicatively connected with the temperature measuring element and the temperature detection element, so as to be able to obtain the detection data of the temperature measuring element and perform control, and the control step includes the following:

[0017] Setting a preset temperature value T1 of the temperature measuring element;

[0018] Setting a maximum temperature difference Δt between the temperature measuring element and the temperature detecting element;

[0019] When the actual temperature detection value detected by the temperature measuring element reaches the sum of T1 and Δt, heating is stopped until the actual temperature detection value of the temperature detecting element reaches T1.

[0020] In order to solve the above technical problems, the second technical solution adopted by the present invention is:

[0021] An optical fiber preparation system comprises the solid material sublimation evaporator device described in the above embodiment.

[0022] Implementing the embodiments of the present invention will have at least the following beneficial effects:

[0023] The above-mentioned solid material sublimation evaporator device is applied to the optical fiber preparation system, which can make itself and the optical fiber preparation system have the technical effect of good evaporation effect. Specifically, the first annular disk and the second annular disk of the present invention are respectively provided with the first groove and the second groove, which can be used to accommodate and place materials for evaporation, and the first annular disk and the second annular disk are both annular structures with inner ring holes. In this way, the uniformity of the overall temperature of the evaporator device can be effectively improved, and the temperature of the entire evaporator is more uniform, and there will be no obvious local overcooling or overheating. Overheating will cause the material to decompose and denature and become invalid, while overcooling will cause the material to condense into a solid state and block the airflow pipeline, thereby solving the technical problem of poor evaporation effect of the existing evaporator device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic structural diagram of an evaporator device in one embodiment;

[0026] Figure 2 for Figure 1 The exploded structural diagram of the evaporator device shown;

[0027] Figure 3 for Figure 2 A cross-sectional view of the exploded structure of the evaporator device is shown.

[0028] in:

[0029] 1. Inlet pipe; 2. Outlet pipe; 3. Container; 4. Annular cover plate; 41. First through hole; 42. Second through hole; 5. First annular disk; 51. First groove; 511. First end; 512. Second end; 52. First boss; 6. Second annular disk; 61. Second groove; 611. Third end; 612. Fourth end; 62. Second boss; 7. Sealing sheet; 71. Strip hole. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] like Figure 1-3 As shown, in an embodiment of a solid material sublimation evaporator device, the evaporation device includes a material tray group, an air inlet pipe 1 and an air outlet pipe 2. The material tray group includes an annular cover plate 4, a first annular plate 5 and a second annular plate 6 which are stacked in sequence and arranged with gaps sealed. The inner annular hole of the annular cover plate 4, the inner annular hole of the first annular plate 5 and the inner annular hole of the second annular plate 6 are connected. The first annular plate 5 is provided with a first groove 51 on the side facing the annular cover plate 4, and the second annular plate 6 is provided with a second groove 61 on the side facing the annular cover plate 4. The annular cover plate 4 is provided with a first through hole 41. The air inlet pipe 1 is penetrated through the first through hole 41 and can be connected with the first groove 51. The bottom of the first groove 51 is provided with a first hole penetrating the first annular plate 5, and the first hole enables the first groove 51 to be connected with the second groove 61. The grass of the second groove 61 is provided with a second hole penetrating the second annular plate 6, and the second hole can be connected with the air outlet pipe 2.

[0034] In this embodiment, the first annular disk 5 and the second annular disk 6 are respectively provided with a first groove 51 and a second groove 61, which can be used to accommodate and place materials for evaporation, and the first annular disk 5 and the second annular disk 6 are both annular structures with inner ring holes, so that the uniformity of the overall temperature of the evaporator device can be effectively improved, and the temperature of the entire evaporator is more uniform, and there will be no obvious local overcooling or overheating. Overheating will cause the material to decompose and denature and become ineffective, while overcooling will cause the material to condense into a solid state and block the airflow pipeline, thereby solving the technical problem of poor evaporation effect of the existing evaporator device.

[0035] In an embodiment of a solid material sublimation evaporator device, the outer diameter of the first annular disk 5 is the same as the outer diameter of the second annular disk 6, the inner diameter of the first annular disk 5 is the same as the inner diameter of the second annular disk 6, and the central axes of the first annular disk 5 and the second annular disk 6 are arranged to coincide.

[0036] In this embodiment, by setting the inner diameter and outer diameter of the first annular disk 5 and the second annular disk 6 to be the same, the two can be easily overlapped and aligned, thereby achieving a better sealing effect.

[0037] It can be understood that, in this embodiment, the first annular disk 5 and the second annular disk 6 can be completely identical structural parts, so that the number of molds to be opened can be reduced during the processing.

[0038] In an embodiment of a solid material sublimation evaporator device, a first boss 52 is provided at the bottom of the first groove 51 corresponding to the first hole, and the first hole passes through the first boss 52. And / or, a second boss 62 is provided at the bottom of the second groove 61 corresponding to the second hole, and the second hole passes through the second boss 62.

[0039] In the present embodiment, it can be understood that the first groove 51 and the second groove 61 are both used to place materials. Under high temperature, the solid material will enter a molten state. By respectively arranging the first boss 52 and the second boss 62 at the positions corresponding to the first hole and the second hole, the orifice position of the first hole and the orifice position of the second hole can be raised by forming a step, thereby preventing the material in the first groove 51 from flowing out through the first hole in a molten state, and preventing the material in the second groove 61 from flowing out through the second hole in a molten state.

[0040] In an embodiment of a solid material sublimation evaporator device, the bottom of the first groove 51 is spirally arranged around the inner ring hole of the first annular disk 5 to have a first end 511, a second end 512, and an extended groove section connecting the first end 511 and the second end 512, the air inlet pipe 1 is connected to the first end 511, and the opening position of the first hole is located in the second end 512. And / or, the bottom of the second groove 61 is spirally arranged around the inner ring hole of the second annular disk 6 to have a third end 611, a fourth end 612, and an extended groove section connecting the third end 611 and the fourth end 612, the first hole is connected to the third end 611, and the opening position of the second hole is located in the fourth end 612.

[0041] In this embodiment, by setting the bottom of the first groove 51 to be spiral, the carrier gas stroke can be increased. The gas enters from one end of the first groove 51 and flows out from the other end after completing the entire stroke. The long stroke can better promote the material to generate steam and avoid too little steam due to a short stroke. Similarly, by setting the second groove 61 to be spiral, the gas stroke in the second groove 61 can be increased, thereby improving the evaporation effect. The large stroke can also enable the evaporator device to have a stable evaporation area and good stability.

[0042] In addition, it can be understood that when the first groove 51 and the second groove 61 are both spiral, the positions of the first hole and the second hole are correspondingly relative. If the first hole is set at the end of the inner circle, the second hole is set at the end of the outer circle, and vice versa.

[0043] Further combined with the previous embodiment, the spiral groove cooperates with the annular disk to make the temperature of the evaporator device more uniform, further improve the uniformity, and avoid local overheating or overcooling.

[0044] In an embodiment of a solid material sublimation evaporator device, the number of the first annular disks 5 is two, the second annular disk 6 is disposed between the two first annular disks 5, and the first hole on the first annular disk 5 away from the annular cover plate 4 is connected to the gas outlet pipe 2. Alternatively, the number of the first annular disk 5 and the second annular disk 6 are both multiple, and they are stacked in the arrangement of the first annular disk 5, the second annular disk 6, and the first annular disk 5.

[0045] In this embodiment, by setting up the stacking of annular disks, the materials of the same batch can be increased, the frequency of material change can be reduced, the downtime for material change can be reduced, and the production effect can be improved. The number of increases and decreases can be arbitrarily increased or decreased according to actual use to meet the needs of different manufacturers. Combined with the previous embodiment of the spiral type of the first groove 51 and the second groove 61, when multiple annular disks are stacked, they are still arranged in such a spiral connection, and each annular disk completes the entire spiral before entering the groove of the next annular disk.

[0046] In the previous embodiments, the sealing between the first annular disk 5 and the annular cover plate 4 and between the first annular disk 5 and the second annular disk 6 can be achieved by crimping and tightly fitting each other, while in an embodiment of a solid material sublimation evaporator device, sealing sheets 7 are provided between the annular cover plate 4 and the first annular disk 5 and between the first annular disk 5 and the second annular disk 6.

[0047] In this embodiment, the sealing of the gap between the two can be ensured by setting the sealing sheet 7, the sealing performance can be improved, the contact between the external air and the internal material can be blocked, and the performance of the material can be ensured not to be affected by moisture and oxygen in the air. Specifically, the sealing sheet 7 can be made of a high temperature and corrosion resistant organic polymer material, has a certain elasticity and is deformable, and compared with the direct contact sealing of the annular disk, the use of the sealing sheet 7 can achieve a better sealing effect, and the sealing sheet 7, as an intermediate sealing member, can also cover the first groove 51 and the second groove 61 to prevent the airflow from not following the travel of the first groove 51 and the second groove 61.

[0048] In an embodiment of a solid material sublimation evaporator device, a plurality of strip holes 71 penetrating the sealing sheet 7 are provided at positions corresponding to the grooves of the annular disk on the sealing sheet 7 to form a mesh-like sealing sheet 7, and the orthographic projection of the inner wall of the strip hole 71 toward the bottom surface of the groove is located within the bottom surface of the groove.

[0049] In this embodiment, in combination with the previous embodiment, the first groove 51 and the second groove 61 are both spiral, and this embodiment can make the structure of the sealing sheet 7 become a mesh by opening strip holes 71 on the sealing sheet 7. The strip holes 71 will correspond to the first groove 51 or the second groove 61, which can ensure that the sealing sheet 7 will not loosen and fall into the groove and reduce the difficulty of installing the sealing sheet 7, and will not affect the sealing effect. Under the mesh structure sealing sheet 7, the airflow still follows the path of the first groove 51 and the second groove 61.

[0050] In an embodiment of a solid material sublimation evaporator device, a second through hole 42 penetrating the annular cover plate 4 is further provided on the annular cover plate 4. The evaporator device also includes a temperature measuring element and a container 3. The container 3 is penetrated through the second through hole 42 and extends into the first groove 51. The temperature measuring element is accommodated in the container 3.

[0051] In this embodiment, the temperature inside the evaporator can be measured by placing the temperature measuring element into the container 3 and extending it into the first groove 51. Specifically, the container 3 preferably adopts a cylindrical structure with a bottom and is not connected to the first groove 51, so as to protect the temperature measuring element.

[0052] In an embodiment of a solid material sublimation evaporator device, the evaporator device further includes a heating control module and a temperature detection element, the temperature detection element is used to detect the temperature of the outer wall of the tray group, the heating control module is communicatively connected with the temperature detection element and the temperature detection element, so as to be able to obtain the detection data of the temperature detection element and perform control, and the control steps include the following:

[0053] Set the preset temperature value T1 of the temperature measuring element.

[0054] Set the maximum temperature difference Δt between the temperature measuring element and the temperature detection element.

[0055] When the actual temperature detection value detected by the temperature measuring element reaches the sum of T1 and Δt, heating is stopped until the actual temperature detection value of the temperature detecting element reaches T1.

[0056] In the present embodiment, the heating control mode of the evaporator device is improved. In combination with the previous embodiment, two temperature measuring components are provided in the present embodiment, one is a temperature measuring element for measuring the temperature inside the evaporator device, and the other is a temperature detection element for measuring the temperature of the outer wall of the evaporator device. It can be understood that due to the different detection points, the temperatures of the two at the same time point are generally different, and the temperature of the inner wall of the evaporator device will reach the T1 value faster. When the temperature value measured by the temperature measuring element reaches the sum of T1 and Δt, heating will no longer continue, and this temperature will be maintained until the actual detection value of the temperature detection element reaches T1. Under such a setting, local overheating will not be caused at the heating end to cause material decomposition, while taking into account the heating efficiency at the same time, thereby achieving a better evaporation effect.

[0057] In addition, a cover body can be used to wrap the evaporator device, and the temperature detection element can be placed in the gap between the evaporator device and the inner wall of the cover body. Specifically, the temperature measuring element and the temperature detection element can both be thermocouple structural parts.

[0058] Finally, the annular cover plate 4 and the first annular disk 5, and the first annular disk 5 and the second annular disk 6 can be sealed and fixed by inserting bolts on the outer circumference, and the installation sequence and torque size can be obtained through simulation to ensure the overall sealing performance of the evaporator device.

[0059] The present invention also relates to an optical fiber preparation system, comprising the solid material sublimation evaporator device in the foregoing embodiment.

[0060] By applying the evaporator device to the optical fiber preparation system, a fixed gas flow path is provided in the evaporator device, which ensures that the carrier gas carrying distance is long enough, so as to provide the optical fiber preparation system with stable carrier gas, effectively improve the product yield, and the material loading capacity is large, which can avoid frequent material replacement and cause large differences in the same batch of products.

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A solid material sublimation evaporator device, characterized in that: The evaporation device includes a material tray group, an air inlet pipe and an air outlet pipe, the material tray group includes an annular cover plate, a first annular disk and a second annular disk which are stacked in sequence and gap-sealed, the inner annular hole of the annular cover plate, the inner annular hole of the first annular disk and the inner annular hole of the second annular disk are connected, the first annular disk is provided with a first groove on a side facing the annular cover plate, the second annular disk is provided with a second groove on a side facing the annular cover plate, a first through hole is provided on the annular cover plate, the air inlet pipe is passed through the first through hole and can be connected with the first groove; a first hole penetrating the first annular disk is provided at the bottom of the first groove, the first hole connects the first groove with the second groove, a second hole penetrating the second annular disk is provided in the grass of the second groove, the second hole can be connected with the air outlet pipe.

2. The evaporator device according to claim 1, characterized in that The outer diameter of the first annular disk is the same as that of the second annular disk, the inner diameter of the first annular disk is the same as that of the second annular disk, and the central axes of the first annular disk and the second annular disk are arranged to coincide with each other.

3. The evaporator device according to claim 1, characterized in that A first boss is provided at the bottom of the first groove at a position corresponding to the first hole, and the first hole passes through the first boss; and / or a second boss is provided at the bottom of the second groove at a position corresponding to the second hole, and the second hole passes through the second boss.

4. The evaporator device according to claim 1, characterized in that The bottom of the first groove is spirally arranged around the inner ring hole of the first annular disk to have a first end, a second end and an extended groove section connecting the first end and the second end, the air inlet pipe is connected to the first end, and the opening position of the first hole is located inside the second end; And / or, the bottom of the second groove is spirally arranged around the inner ring hole of the second annular disk to have a third end, a fourth end and an extended groove section connecting the third end and the fourth end, the first hole is connected to the third end, and the opening position of the second hole is located inside the fourth end.

5. The evaporator device according to claim 1 or 4, characterized in that The number of the first annular disks is two, the second annular disk is arranged between the two first annular disks, and the first hole on the first annular disk away from the annular cover plate is connected to the air outlet pipe; Alternatively, the number of the first annular disk and the number of the second annular disk are both plural, and they are stacked in an arrangement of the first annular disk, the second annular disk, and the first annular disk.

6. The evaporator device according to claim 5, characterized in that Sealing sheets are arranged between the annular cover plate and the first annular disk and between the first annular disk and the second annular disk.

7. The evaporator device according to claim 6, characterized in that A plurality of strip holes penetrating the sealing sheet are provided at the groove positions corresponding to the annular disks to form the sealing sheet with a mesh structure, and the orthographic projections of the inner walls of the strip holes toward the groove bottom surface are located within the groove bottom surface.

8. The evaporator device according to claim 1, characterized in that The annular cover plate is also provided with a second through hole penetrating the annular cover plate. The evaporator device further comprises a temperature measuring element and a container. The container is penetrated through the second through hole and extends into the first groove. The temperature measuring element is accommodated in the container.

9. The evaporator device according to claim 8, characterized in that The evaporator device further comprises a heating control module and a temperature detection element, wherein the temperature detection element is used to detect the temperature of the outer wall of the tray group, and the heating control module is in communication with both the temperature detection element and the temperature detection element so as to obtain the detection data of the temperature detection element and perform control. The control step comprises: the following: Setting a preset temperature value T1 of the temperature measuring element; Setting a maximum temperature difference Δt between the temperature measuring element and the temperature detecting element; When the actual temperature detection value detected by the temperature measuring element reaches the sum of T1 and Δt, heating is stopped until the actual temperature detection value of the temperature detecting element reaches T1.

10. An optical fiber preparation system, characterized in that: It comprises a solid material sublimation evaporator device as described in any one of claims 1 to 9.

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