A heat insulation structure and processing method of optical fiber ring module

Abstract

The present invention provides a heat insulation structure and processing method of an optical fiber ring module, including a base and a shell cover, wherein a placement cavity is provided in the base, and the placement cavity is used to place an optical fiber ring; vacuum cavities are provided around the cross section of the placement cavity: a first vacuum cavity is provided in the base, and a second vacuum cavity is provided in the shell cover, and the first vacuum cavity and the second vacuum cavity are used for heat insulation. The present invention performs heat insulation through the vacuum cavity, so that heat cannot be transmitted into the placement cavity through the outside world, and thus the internal optical fiber ring will not be affected by temperature fluctuations, thereby ensuring the stability of the work and the detection accuracy; the heat transfer path at the connection of the optical fiber ring installation shell is extended, and only a very small amount of heat can be transferred, so the heat insulation effect is better, and the optical fiber ring will not be affected, thereby ensuring the stable operation of the optical fiber ring.

Description

Technical Field

[0001] The invention relates to the technical field of heat insulation of an optical fiber ring module, and in particular to a heat insulation structure and a processing method of the optical fiber ring module. Background Art

[0002] As a new type of optical inertial navigation instrument, fiber optic gyroscope integrates relevant technologies in the fields of optics, electronics, navigation, etc. It has quickly become an important research direction in the field of navigation due to its advantages such as simple structure, high measurement accuracy and low cost.

[0003] The fiber optic ring is one of the core components of the fiber optic gyroscope. In actual engineering applications, the fiber optic gyroscope needs to adapt to complex working environments, including shock, vibration, high and low temperature, etc. The zero bias instability caused by temperature fluctuations affecting the fiber optic ring is the main factor leading to reduced output accuracy and navigation system deviation. When the fiber optic gyroscope is affected by the ambient temperature, the temperature fluctuation will be transmitted to the magnetic shielding shell of the fiber optic ring module, and then to the fiber optic ring. When the temperature changes at two points of the fiber optic ring are inconsistent or there is a temperature difference, it will affect the performance of the fiber optic ring and reduce the accuracy of the fiber optic gyroscope. Therefore, solving the temperature drift error of the fiber optic gyroscope is a key technical problem that needs to be solved in this field.

[0004] Domestic and foreign scholars have studied the temperature drift error compensation of fiber optic gyroscopes, mainly from the perspectives of mechanism, temperature control, and algorithm. However, due to process limitations and engineering adaptability issues, the compensation accuracy is limited and the temperature drift error of the fiber optic gyroscope cannot be solved from the root cause. Summary of the invention

[0005] The main purpose of the present invention is to provide a heat insulation structure and processing method of an optical fiber ring module, so as to solve the problem of limited accuracy of temperature drift error compensation for optical fiber gyroscopes in the prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A heat insulation structure of an optical fiber ring module comprises a base and a shell cover, wherein a placement cavity is provided in the base, and the placement cavity is used to place the optical fiber ring; Vacuum chambers are arranged around the cross section of the placement chamber: a first vacuum chamber is arranged in the base, and a second vacuum chamber is arranged in the shell cover. The first vacuum chamber and the second vacuum chamber are used for heat insulation.

[0007] In a preferred embodiment, the base and the shell cover are provided with a heat-insulating coating; Two heat-insulating pads are arranged in the placement cavity. The heat-insulating pads are ring-shaped. The optical fiber ring is connected between the two heat-insulating pads. The optical fiber ring is not in direct contact with the base and the shell cover.

[0008] In a preferred solution, a connection groove is provided in the placement cavity, and a plug sleeve is provided in the shell cover, and the plug sleeve is located inside the connection groove, and the plug sleeve is adapted to the connection groove; A third vacuum chamber is provided in the plug sleeve, and the third vacuum chamber is communicated with the second vacuum chamber; The placement cavity is an annular cavity, the plug sleeve is an annular sleeve, and the inner diameter of the plug sleeve is matched with the outer diameter of the placement cavity; The surface of the plug sleeve is provided with a heat insulation coating.

[0009] In a preferred solution, the shell cover is provided with an extension sleeve, and the extension sleeve is located inside the placement cavity; A fourth vacuum chamber is provided in the extension sleeve, and the fourth vacuum chamber is communicated with the second vacuum chamber; The placement cavity is an annular cavity, the extension sleeve is an annular sleeve, and the inner diameter of the extension sleeve is matched with the inner diameter of the placement cavity; The surface of the extension sleeve is provided with a heat insulation coating.

[0010] In a preferred solution, the base includes a first cover plate, the first cover plate covers the first vacuum chamber, and a first air hole is provided in the first cover plate, and the first air hole is used for evacuating the first vacuum chamber; The shell cover comprises a second cover plate, which covers the second vacuum chamber. A second air hole is arranged in the second cover plate, and the second air hole is used for evacuating the second vacuum chamber.

[0011] In a preferred embodiment, the base includes a first annular groove and a second annular groove, and the first annular groove and the second annular groove are combined to form the base; The connecting edge of the first annular groove and the second annular groove is sealed, and the interval between the first annular groove and the second annular groove forms a vacuum chamber; A first air hole is provided in the first annular groove, and the first air hole is used for vacuuming; The shell cover comprises a first ring cover and a second ring cover, wherein the first ring cover and the second ring cover are connected to form the shell cover; The connecting edge of the first ring cover and the second ring cover is sealed, and the interval between the first ring cover and the second ring cover forms a vacuum chamber; A second air hole is arranged in the second ring cover, and the second air hole is used for vacuuming.

[0012] In a preferred solution, a first conical hole is provided in the base, a first sealing block is provided in the first conical hole, and the first sealing block is conical; The connection between the first tapered hole and the first sealing block is in close contact; The first sealing block is provided with a first air hole; The base is provided with a sensor, a detected block is provided on a side of the first sealing block away from the base, and a detection end of the sensor is aligned with the detected block.

[0013] In a preferred solution, a second tapered hole is provided in the shell cover, a second sealing block is provided in the second tapered hole, and the second sealing block is tapered; The second tapered hole and the second sealing block are in close contact at the connection point; The second sealing block is provided with a second air hole.

[0014] A method for processing a heat insulation structure of an optical fiber ring module comprises the following steps: S1, processing a first ring groove, a second ring groove, a first ring cover and a second ring cover; Air holes are machined in the first ring groove and the second ring cover; S2, connecting the first annular groove and the second annular groove, and welding the connecting edges to form a base; S3, the first ring cover and the second ring cover are connected, and the connecting edges are welded to form a shell cover; S4, evacuate the base and the shell cover through the air holes; S5, install the optical fiber ring into the base and cover the shell; The above steps complete the processing and connection of the heat insulation structure of the optical fiber ring module.

[0015] In a preferred embodiment, the base and the shell cover are made of an iron-nickel alloy, including 1J85 or 1J79; In S1, the processing methods include die processing, milling, stamping and cutting; In S3, this includes: S31, place glass beads at the reserved pores; S32, heating to melt the glass beads; S33, evacuating the air to form a vacuum cavity; S34, cooling down, the glass beads solidify and block the air inlet.

[0016] The present invention provides a heat insulation structure and processing method of an optical fiber ring module. By adopting the above scheme, the following beneficial effects are achieved: 1. The vacuum cavity is used for heat insulation, so that heat cannot be transmitted into the cavity from the outside, and the internal fiber ring will not be affected by temperature fluctuations, ensuring the working stability and detection accuracy, and solving the temperature drift error of the fiber optic gyroscope from the root cause.

[0017] 2. The connection between the fiber optic ring and the housing can only transfer very little heat, so the heat insulation effect is better and will not affect the fiber optic ring, thereby ensuring the stable operation of the fiber optic ring module.

[0018] 3. It can extend the heat transfer path, further reduce the heat transfer, and ensure the stable operation of the fiber optic ring module.

[0019] 4. When the vacuum chamber is no longer vacuum due to air leakage, it can promptly remind you, so as to facilitate timely processing and ensure the stable operation of the optical fiber ring module.

[0020] 5. The structure is compact, there is no need to change the structure of the supporting equipment, the connection is convenient, and the modification cost is saved.

[0021] 6. Easy to process, no complicated processing structure, no need to use complicated processing methods and processing equipment, and lower processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a structural schematic diagram of a heat insulation structure of an optical fiber ring module of the present invention; Figure 2 It is an exploded view of a heat insulation structure of an optical fiber ring module of the present invention; Figure 3 is a cross-sectional view of a heat insulation structure of an optical fiber ring module of the present invention; Figure 4 It is a schematic structural diagram of an embodiment of a heat insulation structure of an optical fiber ring module of the present invention; Figure 5 It is a schematic structural diagram of an embodiment of a heat insulation structure of an optical fiber ring module of the present invention; Figure 6 It is a schematic structural diagram of an embodiment of a heat insulation structure of an optical fiber ring module of the present invention; Figure 7 It is a schematic diagram of the structure of an embodiment of the first air hole of the present invention.

[0023] Figure 8 It is a schematic structural diagram of an embodiment of a heat insulation structure of an optical fiber ring module of the present invention; Fig. 9 It is a schematic structural diagram of an embodiment of a heat insulation structure of an optical fiber ring module of the present invention; Fig.10 It is a schematic structural diagram of an embodiment of a heat insulation structure of an optical fiber ring module of the present invention; In the figure: Base 1, first cover plate 101, first vacuum chamber 102, first air hole 103, first sealing block 104, sensor 105, detected block 106, first annular groove 111, second annular groove 112, shell cover 2, second cover plate 201, second vacuum chamber 202, second air hole 203, second sealing block 204, first ring cover 211, second ring cover 212, placement chamber 3, thermal insulation pad 4, connecting groove 501, plug sleeve 502, third vacuum chamber 503, extension sleeve 601, fourth vacuum chamber 602. DETAILED DESCRIPTION

[0024] Embodiment 1: like Figure 1 , 2As shown in FIG. 3 , a heat insulation structure of an optical fiber ring module includes a base 1 and a shell cover 2. A placement cavity 3 is provided in the base 1. The placement cavity 3 is used to place the optical fiber ring. The size of the placement cavity 3 is determined according to the size of the actual optical fiber ring. Vacuum chambers are arranged around the cross section of the placement chamber 3: a first vacuum chamber 102 is arranged in the base 1, and a second vacuum chamber 202 is arranged in the shell cover 2. The first vacuum chamber 102 and the second vacuum chamber 202 are used for heat insulation.

[0025] The present application uses a vacuum cavity for heat insulation, so that heat cannot be transmitted into the placement cavity 3 from the outside, and the internal optical fiber ring will not be affected by temperature fluctuations, thereby ensuring working stability and detection accuracy.

[0026] In a preferred solution, the base 1 is provided with a first cover plate 101 , the first cover plate 101 covers the first vacuum chamber 102 , and a first air hole 103 is provided in the first cover plate 101 , and the first air hole 103 is used for evacuating the first vacuum chamber 102 .

[0027] In a preferred solution, the shell cover 2 is provided with a second cover plate 201 , the second cover plate 201 covers the second vacuum chamber 202 , and a second air hole 203 is provided in the second cover plate 201 , and the second air hole 203 is used for evacuating the second vacuum chamber 202 .

[0028] Vacuuming uses existing vacuuming equipment. In this application, Figure 3 As shown, the path for external heat to be transferred to the optical fiber ring is only part of the connection between the base 1 and the shell cover 2. After the heat is transferred, it needs to pass through part of the shell of the base 1 before it can be transferred to the optical fiber ring. In this process, the heat is further consumed, which can effectively reduce the heat transferred to the optical fiber ring and ensure the stable operation of the optical fiber ring.

[0029] Compared with the existing complex insulation structure, the structure of the present application is simple to process, has lower processing cost, and has a compact structure. It does not occupy too much space and is easy to adapt to existing installation structures, supporting equipment and connection methods. There is no need to change the structure of the supporting equipment, further reducing costs.

[0030] In a preferred solution, the surfaces of the base 1 and the shell cover 2 are both provided with a thermal insulation coating, and the thermal insulation coating includes a composite silicate thermal insulation coating and the like.

[0031] In the preferred embodiment, Figure 4 As shown, two thermal insulation pads 4 are arranged in the placement cavity 3. The thermal insulation pads 4 are ring-shaped, and the optical fiber ring is connected between the two thermal insulation pads 4, so that the optical fiber ring will not be in direct contact with the base 1 and the shell cover 2, which can further increase the thermal insulation effect and make the optical fiber ring less affected by external heat.

[0032] Embodiment 2: like Figure 5As shown, a connection groove 501 is provided in the placement cavity 3, and a plug sleeve 502 is provided in the shell cover 2. The plug sleeve 502 is located inside the connection groove 501, and the plug sleeve 502 is adapted to the connection groove 501; A third vacuum chamber 503 is provided in the plug sleeve 502, and the third vacuum chamber 503 is connected to the second vacuum chamber 202; The placement cavity 3 is an annular cavity, and the plug sleeve 502 is an annular sleeve. The inner diameter of the plug sleeve 502 is matched with the outer diameter of the placement cavity 3 to ensure that the plug sleeve 502 is close to the outer wall of the base 1; The surface of the plug sleeve 502 is provided with a heat-insulating coating, which includes a composite silicate heat-insulating coating, etc., for reducing the transfer of heat at the connection.

[0033] In the embodiment itself, a double-layer vacuum structure is formed at the connection position between the base 1 and the shell cover 2, so that less heat can be transferred through the connection position between the base 1 and the shell cover 2, and a longer transfer path is required to be transferred to the optical fiber ring, which further increases the heat insulation effect and ensures the stability of the optical fiber ring. Even if the optical fiber ring contacts the inner wall of the base 1 and the plug-in sleeve 502, the heat needs to pass through a longer transfer path. This embodiment is used to further isolate the heat transfer from the outside of the base 1 to the inside of the base 1.

[0034] Embodiment 3: like Figure 6 As shown, the shell cover 2 is provided with an extension sleeve 601, and the extension sleeve 601 is located inside the placement cavity 3; A fourth vacuum chamber 602 is provided in the extension sleeve 601, and the fourth vacuum chamber 602 is connected to the second vacuum chamber 202; The placement cavity 3 is an annular cavity, and the extension sleeve 601 is an annular sleeve. The inner diameter of the extension sleeve 601 is matched with the inner diameter of the placement cavity 3 to ensure that the extension sleeve 601 is close to the inner wall of the base 1; The surface of the extension sleeve 601 is provided with a heat-insulating coating, which includes a composite silicate heat-insulating coating, etc., for reducing the transfer of heat at the connection.

[0035] In the embodiment itself, a double-layer vacuum structure is formed at the connection position between the base 1 and the shell cover 2, so that less heat can be transferred through the connection position between the base 1 and the shell cover 2, and a longer transfer path is required to be transferred to the optical fiber ring, which further increases the heat insulation effect and ensures the stability of the optical fiber ring. Even if the optical fiber ring contacts the inner wall of the base 1 and the plug-in sleeve 502, the heat needs to pass through a longer transfer path. This embodiment is used to further isolate the heat transfer from the inner side of the base 1 to the inside of the base 1.

[0036] In a further embodiment, Embodiment 2 and Embodiment 3 can be used in combination.

[0037] Embodiment 4: like Figure 7 As shown, a first tapered hole is provided in the base 1, a first sealing block 104 is provided in the first tapered hole, the first sealing block 104 is tapered, and the connection between the first tapered hole and the first sealing block 104 is in close contact; The first sealing block 104 is provided with a first air hole 103; The base 1 is provided with a sensor 105 , which is preferably an infrared sensor. A detected block 106 is provided on a side of the first sealing block 104 away from the base 1 .

[0038] Under normal conditions, a pressure difference is generated between the first vacuum chamber 102 and the atmosphere, so that the first sealing block 104 can be tightly attached to the first conical hole to complete the sealing. When the first vacuum chamber 102 leaks and the interior is no longer in a vacuum environment, the pressure difference disappears, and the first sealing block 104 falls off naturally under the action of gravity. The sensor 105 cannot detect the detected block 106. The control unit connected to the sensor 105 receives a change in the signal of the sensor 105 and sends out an alarm signal. The staff sees the clamping signal and handles it in time to avoid the vacuum chamber being unable to be discovered in time when it is no longer a vacuum, thereby ensuring the stable operation of the optical fiber ring.

[0039] In a further embodiment, a second tapered hole is provided in the housing cover 2, a second sealing block 204 is provided in the second tapered hole, and the second sealing block 204 is tapered; The second tapered hole and the second sealing block 204 are in close contact at their connection; The second sealing block 204 is provided with a second air hole 203 .

[0040] Under normal conditions, there is a pressure difference between the second vacuum chamber 202 and the atmosphere, so that the second sealing block 204 can be tightly attached to the second tapered hole to complete the sealing. When the second vacuum chamber 202 leaks and the interior is no longer in a vacuum environment, the pressure difference disappears and the second sealing block 204 is in a loose state. The user can regularly check whether the second sealing block 204 is sealed, so as to promptly find out whether the second vacuum chamber 202 is in a vacuum state.

[0041] Embodiment 5: like Figure 8 , 9 As shown in FIG. 10 , the base 1 includes a first annular groove 111 and a second annular groove 112 , and the first annular groove 111 and the second annular groove 112 are combined to form the base 1 ; The connecting edge of the first annular groove 111 and the second annular groove 112 is sealed, and the interval between the first annular groove 111 and the second annular groove 112 forms a vacuum chamber; A first air hole 103 is provided in the first annular groove 111, and the first air hole 103 is used for vacuuming; The shell cover 2 includes a first ring cover 211 and a second ring cover 212, and the first ring cover 211 and the second ring cover 212 are connected to form the shell cover 2; The connecting edge of the first ring cover 211 and the second ring cover 212 is sealed, and the interval between the first ring cover 211 and the second ring cover 212 forms a vacuum chamber; The second ring cover 212 is provided with a second air hole 203, which is used for vacuuming. Through the arrangement of this embodiment, when processing the first annular groove 111, the second annular groove 112, the first ring cover 211 and the second ring cover 212, there are no deep holes or deep grooves, and the processing can be completed by conventional processing methods, which greatly reduces the processing cost.

[0042] Embodiment 6: A method for processing a heat insulation structure of an optical fiber ring module comprises the following steps: S1, processing the first annular groove 111, the second annular groove 112, the first ring cover 211 and the second ring cover 212; Air holes are machined in the first ring groove 111 and the second ring cover 212; S2, connecting the first annular groove 111 and the second annular groove 112, welding the connecting edges to form the base 1, and forming a vacuum chamber between the first annular groove 111 and the second annular groove 112; S3, the first ring cover 211 and the second ring cover 212 are connected, and the connecting edges are welded to form a shell cover 2, and a vacuum chamber is formed between the first ring cover 211 and the second ring cover 212; S4, evacuating the vacuum chambers of the base 1 and the shell cover 2 through the air holes; the evacuation is performed using existing evacuation equipment; S5, installing the optical fiber ring into the base 1 and covering the housing cover 2; The above steps complete the processing and connection of the heat insulation structure of the optical fiber ring module.

[0043] In a preferred solution, the processing material of the base 1 and the shell cover 2 is an iron-nickel alloy, including 1J85 or 1J79.

[0044] In the preferred scheme, in S1, the processing methods of the base 1 and the shell cover 2 include mold processing, milling processing, stamping processing and cutting processing; for example, the mold is set according to the drawing requirements of the base 1 and the shell cover 2, and then the base 1 and the shell cover 2 are processed by the mold, and finally polished by grinding and polishing equipment.

[0045] In S3, this includes: S31, placing glass beads at the reserved pores, the pores being the first pore 103 and the second pore 203; S32, heating to melt the glass beads; S33, evacuate to form a vacuum cavity, using existing vacuum equipment, the vacuum cavity is a first vacuum cavity 102 and a second vacuum cavity 202; S34, cooling down, the glass beads solidify and block the air inlet, completing the sealing.

[0046] The welding method preferably adopts laser welding, and the weld is continuously cut and sealed; through the processing method provided in the present application, an optical fiber ring module insulation structure with good insulation effect can be processed, and the processing difficulty is low, and there is no need to use complex processing equipment and methods, and the processing cost is low.

[0047] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A heat insulation structure of an optical fiber ring module, characterized in that: It comprises a base (1) and a shell cover (2); a placement cavity (3) is provided in the base (1); the placement cavity (3) is used to place an optical fiber ring; Vacuum chambers are arranged around the cross section of the placement chamber (3): a first vacuum chamber (102) is arranged in the base (1), and a second vacuum chamber (202) is arranged in the shell cover (2); the first vacuum chamber (102) and the second vacuum chamber (202) are used for heat insulation.

2. The heat insulation structure of the optical fiber ring module according to claim 1, characterized in that: The surfaces of the base (1) and the shell cover (2) are provided with a heat insulation coating; Two heat insulating pads (4) are arranged in the placement cavity (3); the heat insulating pads (4) are ring-shaped; the optical fiber ring is connected between the two heat insulating pads (4); and the optical fiber ring is not in direct contact with the base (1) and the shell cover (2).

3. The heat insulation structure of the optical fiber ring module according to claim 1, characterized in that: A connecting groove (501) is provided in the placement cavity (3), and a plug sleeve (502) is provided on the shell cover (2). The plug sleeve (502) is located inside the connecting groove (501), and the plug sleeve (502) is adapted to the connecting groove (501); A third vacuum chamber (503) is provided in the plug sleeve (502), and the third vacuum chamber (503) is communicated with the second vacuum chamber (202); The placement cavity (3) is an annular cavity, the plug sleeve (502) is an annular sleeve, and the inner diameter of the plug sleeve (502) is matched to the outer diameter of the placement cavity (3); The surface of the plug sleeve (502) is provided with a heat insulation coating.

4. The heat insulation structure of the optical fiber ring module according to claim 1, characterized in that: The shell cover (2) is provided with an extension sleeve (601), and the extension sleeve (601) is located inside the placement cavity (3); A fourth vacuum chamber (602) is provided in the extension sleeve (601), and the fourth vacuum chamber (602) is communicated with the second vacuum chamber (202); The placement cavity (3) is an annular cavity, the extension sleeve (601) is an annular sleeve, and the inner diameter of the extension sleeve (601) is matched to the inner diameter of the placement cavity (3); The surface of the extension sleeve (601) is provided with a heat insulation coating.

5. The heat insulation structure of the optical fiber ring module according to any one of claims 1 to 4, characterized in that: The base (1) comprises a first cover plate (101), the first cover plate (101) covers the first vacuum chamber (102), a first air hole (103) is provided in the first cover plate (101), and the first air hole (103) is used to evacuate the first vacuum chamber (102); The shell cover (2) comprises a second cover plate (201), the second cover plate (201) covers the second vacuum chamber (202), a second air hole (203) is provided in the second cover plate (201), and the second air hole (203) is used to evacuate the second vacuum chamber (202).

6. A heat insulation structure of an optical fiber ring module according to any one of claims 1 to 4, characterized in that: The base (1) comprises a first annular groove (111) and a second annular groove (112), and the first annular groove (111) and the second annular groove (112) are combined to form the base (1); The connecting edge of the first annular groove (111) and the second annular groove (112) is sealed, and the interval between the first annular groove (111) and the second annular groove (112) forms a vacuum chamber; A first air hole (103) is provided in the first annular groove (111), and the first air hole (103) is used for vacuuming; The shell cover (2) comprises a first ring cover (211) and a second ring cover (212), and the first ring cover (211) and the second ring cover (212) are connected to form the shell cover (2); The connecting edge of the first ring cover (211) and the second ring cover (212) is sealed, and the interval between the first ring cover (211) and the second ring cover (212) forms a vacuum chamber; A second air hole (203) is provided in the second ring cover (212), and the second air hole (203) is used for vacuuming.

7. A heat insulation structure of an optical fiber ring module according to any one of claims 1 to 4, characterized in that: A first conical hole is provided in the base (1), a first sealing block (104) is provided in the first conical hole, and the first sealing block (104) is conical; The connection between the first tapered hole and the first sealing block (104) is in close contact; The first sealing block (104) is provided with a first air hole (103); The base (1) is provided with a sensor (105), and a detected block (106) is provided on a side of the first sealing block (104) away from the base (1), and a detection end of the sensor (105) is aligned with the detected block (106).

8. The heat insulation structure of the optical fiber ring module according to any one of claims 1 to 4, characterized in that: A second conical hole is provided in the shell cover (2), a second sealing block (204) is provided in the second conical hole, and the second sealing block (204) is conical; The second tapered hole and the second sealing block (204) are in close contact at the connection point; The second sealing block (204) is provided with a second air hole (203).

9. A method for processing the heat insulation structure of the optical fiber ring module according to any one of claims 1 to 8, characterized in that: The steps include: S1, processing a first annular groove (111), a second annular groove (112), a first ring cover (211), and a second ring cover (212); Air holes are machined in the first ring groove (111) and the second ring cover (212); S2, connecting the first annular groove (111) and the second annular groove (112), and welding the connecting edges to form a base (1); S3, the first ring cover (211) and the second ring cover (212) are connected, and the connecting edges are welded to form a shell cover (2); S4, evacuating the base (1) and the shell cover (2) through the air holes; S5, installing the optical fiber ring into the base (1) and covering the housing cover (2); The above steps complete the processing and connection of the heat insulation structure of the optical fiber ring module.

10. The method for processing the heat insulation structure of the optical fiber ring module according to claim 8, characterized in that: The base (1) and the shell cover (2) are made of an iron-nickel alloy, including 1J85 or 1J79; In S1, the processing methods include die processing, milling, stamping and cutting; In S3, this includes: S31, place glass beads at the reserved pores; S32, heating to melt the glass beads; S33, evacuating the air to form a vacuum cavity; S34, cooling down, the glass beads solidify and block the air inlet.

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