A novel thermal insulation shielding cover for fiber optic rings

Abstract

This utility model relates to the field of optical fiber devices and auxiliary equipment technology, and discloses a novel thermal insulation shielding cover for optical fiber rings, including an upper outer shielding cover and a lower outer shielding cover, the lower outer shielding cover including a mounting mechanism. Through the design of the mounting mechanism, this utility model allows for easy installation by simply aligning the mounting sleeve and tightening the bolts; during disassembly, loosening the bolts separates the upper and lower outer shielding covers, making installation and disassembly flexible and significantly improving maintenance efficiency. The outer annular groove cooperates with the first sealing ring, and the inner annular groove cooperates with the second sealing ring, thus forming a double sealing structure. Combined with the design of the first and second annular bosses, the bolt preload compresses the two sealing rings, forming a tight double sealing barrier. The annular bosses extend the heat conduction path, further reducing heat transfer, and together with the honeycomb core interlayer, form a dual guarantee of sealing and heat insulation, making the constant temperature environment of the internal optical fiber ring more stable, far exceeding the sealing and thermal insulation effect of welded joints where gaps are easily left.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber devices and auxiliary technology, and in particular to a novel thermal insulation shielding cover for optical fiber rings. Background Technology

[0002] The new thermal insulation shield is a special protective device designed for the working characteristics of fiber optic rings. It fits the structure of the fiber optic ring and has both temperature control and external interference isolation functions. On the one hand, it can isolate external signal interference such as electromagnetic interference and radio frequency interference, prevent interference signals from entering the fiber optic ring and ensure the purity of optical signal transmission. On the other hand, it can maintain the stable temperature environment required for the operation of the fiber optic ring and avoid high and low temperature fluctuations from affecting the transmission accuracy and stability of the fiber optic ring.

[0003] Patent authorization announcement number CN223295440U proposes a novel thermal insulation shielding cover for fiber optic rings, belonging to the technical field of thermal insulation devices for fiber optic gyroscope key components, fiber optic rings. It includes an upper shielding cover and a lower shielding cover, with the upper shielding cover welded above the lower shielding cover. This invention utilizes solid nickel-iron soft magnetic alloy material for both the inner and outer shielding covers, which possesses excellent magnetic permeability and can effectively shield the fiber optic ring from external environmental interference. Furthermore, the sandwich layer composed of the upper and lower honeycomb core layers has advantages such as lightweight, high strength, and corrosion resistance, effectively reducing the weight of the shielding cover, facilitating transportation and installation, while improving the shielding effect. It can also effectively reduce the impact of temperature on the fiber optic ring, thereby improving gyroscope accuracy. The shielding cover's three-layer design can more effectively shield the fiber optic from external environmental interference, improving the stability of fiber optic communication.

[0004] The aforementioned patent uses welding to connect the upper and lower shielding covers during use. This connection method is irreversible. If the fiber optic ring malfunctions and needs to be repaired or replaced later, the welding structure can only be destroyed. This not only results in high repair costs but may also render the entire shielding cover unusable. Furthermore, the welds may not be tight, allowing outside air and heat to easily enter the interior through the gaps, leading to large internal temperature fluctuations and making it difficult to maintain the constant temperature environment required by the fiber optic ring. The insulation and sealing performance is insufficient. Based on this, a new type of thermal insulation shielding cover for fiber optic rings is proposed for improvement. Utility Model Content

[0005] In view of the problems of difficult installation and maintenance, high operating costs, and insufficient thermal insulation and sealing performance of the existing devices, which affect the working environment of the optical fiber ring, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a novel thermal insulation shielding cover for optical fiber rings, comprising an upper outer shielding cover and a lower outer shielding cover, wherein the lower outer shielding cover includes an installation mechanism, an outer annular groove is provided on the outer side of the top of the lower outer shielding cover, a first sealing ring is provided inside the outer annular groove, a first annular boss is fixedly connected to the inner wall of the outer annular groove, an inner annular groove is provided on the inner side of the top of the outer annular groove, a second sealing ring is provided inside the inner annular groove, and a second annular boss is fixedly connected to the inner wall of the inner annular groove; The lower surface of the upper outer shield is in contact with the first sealing ring and the second sealing ring respectively. The bottom end of the upper outer shield is fixedly connected to the mounting sleeve. The surface of the mounting sleeve is provided with several fastening bolts. One end of the fastening bolt passes through the inside of the mounting sleeve and is threaded to the side wall of the lower outer shield.

[0007] As a preferred embodiment, the fastening bolts are arranged in a circular pattern, and two adjacent fastening bolts are set at a 90-degree angle with the center point of the mounting sleeve as the axis.

[0008] As a preferred embodiment, an upper inner shield is provided below the upper outer shield, and a lower inner shield is provided on the inner wall of the lower outer shield.

[0009] As a preferred embodiment, an upper honeycomb core interlayer is provided between the upper outer shield and the upper inner shield, and a lower honeycomb core interlayer is provided between the lower outer shield and the lower inner shield.

[0010] As a preferred embodiment, the upper inner shield is fitted into the top slot of the lower inner shield, and the lower surface of the upper honeycomb core interlayer is in contact with the top of the lower honeycomb core interlayer.

[0011] As a preferred embodiment, an optical fiber ring body is provided between the upper inner shield and the lower inner shield, and flexible magnetic pads are provided on both sides of the optical fiber ring body. The flexible magnetic pads are fixedly connected to the inner wall of the lower inner shield.

[0012] As a preferred embodiment, the upper outer shield and the lower outer shield are made of nickel-iron soft magnetic alloy, and the upper inner shield and the lower inner shield are made of permalloy.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through the design of the installation mechanism, allows for easy installation by simply aligning the mounting sleeve with the position and tightening the bolts; during disassembly, loosening the bolts allows for the separation of the upper and lower outer shielding covers, making installation and disassembly flexible and significantly improving maintenance efficiency; the outer annular groove cooperates with the first sealing ring, and the inner annular groove cooperates with the second sealing ring, thus forming a double sealing structure. Combined with the design of the first and second annular bosses, the bolt preload will compress the two sealing rings, forming a tight double sealing barrier; the annular bosses can extend the heat conduction path, further reducing heat transfer, and forming a dual guarantee of sealing and heat insulation with the honeycomb core interlayer, making the constant temperature environment of the internal optical fiber ring more stable, far exceeding the sealing and heat insulation effect of the welded joints which are prone to gaps.

[0014] 2. This utility model adopts a layered material selection design with an outer layer of iron-nickel soft magnetic alloy and an inner layer of permalloy. It can first attenuate complex and strong external magnetic fields, and then accurately absorb residual weak magnetic fields to achieve step-by-step shielding, thereby greatly improving the shielding effect. At the same time, the flexible magnetic pad fills the gaps, reduces the magnetic field leakage channels, and the overall shielding is more thorough. It can better ensure the working accuracy of the fiber optic ring, make the fiber optic ring protection more comprehensive, and reduce the risk of damage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 Enlarged structural diagram of the installation mechanism; Figure 4 for Figure 2 A magnified structural diagram of point A in the middle.

[0016] Explanation of reference numerals in the attached figures: 1. Upper outer shield; 11. Upper inner shield; 2. Lower outer shield; 21. Lower inner shield; 3. Upper honeycomb core interlayer; 4. Lower honeycomb core interlayer; 5. Flexible magnetic conductive pad; 6. Fiber optic ring body; 7. Mounting mechanism; 71. Outer annular groove; 72. First sealing ring; 73. First annular boss; 74. Inner annular groove; 75. Second sealing ring; 76. Second annular boss; 77. Mounting sleeve; 78. Fastening bolts. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Reference Figures 1-4This first embodiment of the present invention provides a novel thermal insulation shielding cover for an optical fiber ring, comprising an upper outer shielding cover 1 and a lower outer shielding cover 2. The lower outer shielding cover 2 includes a mounting mechanism 7. An outer annular groove 71 is formed on the outer side of the top of the lower outer shielding cover 2. A first sealing ring 72 is provided inside the outer annular groove 71. A first annular boss 73 is fixedly connected to the inner wall of the outer annular groove 71. An inner annular groove 74 is formed on the inner side of the top of the outer annular groove 71. A second sealing ring 75 is provided inside the inner annular groove 74. A second annular boss 76 is fixedly connected to the inner wall of the inner annular groove 74. Through the split design of the upper outer shielding cover 1 and the lower outer shielding cover 2, combined with the outer annular groove 71, the first sealing ring 72, the first annular boss 73, the inner annular groove 74, the second sealing ring 75, and the second annular boss 76, a structural foundation is laid for subsequent sealing and thermal insulation effects.

[0019] The lower surface of the upper outer shield 1 contacts the first sealing ring 72 and the second sealing ring 75 respectively. The bottom end of the upper outer shield 1 is fixedly connected to the mounting sleeve 77. The surface of the mounting sleeve 77 is provided with several fastening bolts 78. One end of the fastening bolt 78 passes through the inside of the mounting sleeve 77 and is threaded to the side wall of the lower outer shield 2. The upper outer shield 1 achieves the fit and fixation of the upper outer shield 1 and the lower outer shield 2 by contacting the first sealing ring 72 and the second sealing ring 75, combined with the threaded connection of the mounting sleeve 77 and the fastening bolts 78.

[0020] Several fastening bolts 78 are arranged in a circular pattern, with adjacent fastening bolts 78 set at a 90-degree angle with the center point of the mounting sleeve 77 as the axis. The 90-degree circular distribution design allows the pre-tightening force of the fastening bolts 78 to be evenly transmitted, avoiding uneven local stress, improving the stability of the connection between the upper outer shield 1 and the lower outer shield 2, and indirectly ensuring the consistency of sealing and heat preservation effects.

[0021] Specifically, during installation, the fiber optic ring body 6 is first placed inside the lower inner shield 21, so that it is positioned between two flexible magnetic pads 5, thus completing the positioning of the internal core components.

[0022] Next, the first sealing ring 72 is embedded in the outer annular groove 71 of the lower outer shield 2, and the second sealing ring 75 is embedded in the inner annular groove 74. The first annular boss 73 and the second annular boss 76 can increase the length of the heat conduction path and further reduce heat transfer. Then, align the installation positions of the upper outer shield 1 and the lower outer shield 2, so that the lower surface of the upper outer shield 1 simultaneously fits the first sealing ring 72 and the second sealing ring 75. The mounting sleeve 77 is fitted onto the outer side wall of the lower outer shield 2. Finally, tighten all the fastening bolts 78 in sequence, so that one end of them passes through the mounting sleeve 77 and is threaded to the side wall of the lower outer shield 2. The pre-tightening force of the fastening bolts 78 compresses the first sealing ring 72 and the second sealing ring 75, realizing the integrated sealing and fixing, and completing the overall installation.

[0023] Reference Figures 1-4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: an upper inner shield 11 is provided below the upper outer shield 1, and a lower inner shield 21 is provided on the inner wall of the lower outer shield 2; an upper inner shield 11 is provided below the upper outer shield 1, and a lower inner shield 21 is provided on the inner wall of the lower outer shield 2, forming a double shielding barrier with an inner and outer double-layer structure.

[0024] An upper honeycomb core interlayer 3 is provided between the upper outer shield 1 and the upper inner shield 11, and a lower honeycomb core interlayer 4 is provided between the lower outer shield 2 and the lower inner shield 21.

[0025] The upper inner shield 11 is fitted into the top slot of the lower inner shield 21, and the lower surface of the upper honeycomb core interlayer 3 is in contact with the top of the lower honeycomb core interlayer 4; after installation, the upper honeycomb core interlayer 3 and the lower honeycomb core interlayer 4 are in close contact, which enhances the thermal insulation performance.

[0026] An optical fiber ring body 6 is provided between the upper inner shield 11 and the lower inner shield 21. Flexible magnetic pads 5 are provided on both sides of the optical fiber ring body 6. The flexible magnetic pads 5 are fixedly connected to the inner wall of the lower inner shield 21.

[0027] The upper outer shield 1 and the lower outer shield 2 are made of nickel-iron soft magnetic alloy, while the upper inner shield 11 and the lower inner shield 21 are made of permalloy.

[0028] Specifically, after the upper outer shield 1 and the lower outer shield 2 are installed, the upper inner shield 11 is fitted into the top slot of the lower inner shield 21, so that the lower surface of the upper honeycomb core interlayer 3 is in close contact with the top of the lower honeycomb core interlayer 4, forming a heat-insulating shielding cavity.

[0029] The flexible magnetic pad 5 is used to fill gaps to reduce magnetic field leakage channels and avoid wear on the fiber optic ring body 6 due to hard contact. The upper outer shield 1 and the lower outer shield 2 are made of nickel-iron soft magnetic alloy, which has good structural strength and anti-magnetic saturation ability and can cope with complex external strong magnetic field environments. The upper inner shield 11 and the lower inner shield 21 are made of permalloy, whose core advantages are extremely high permeability and low coercivity. It has excellent shielding effect on weak magnetic fields after attenuation by the outer layer and can further absorb residual weak magnetic fields, minimizing magnetic field interference to the fiber optic ring.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel thermal insulation shielding cover for fiber optic rings, comprising an upper outer shielding cover (1) and a lower outer shielding cover (2), characterized in that: The lower outer shield (2) includes an installation mechanism (7). An outer annular groove (71) is provided on the outer side of the top of the lower outer shield (2). A first sealing ring (72) is provided inside the outer annular groove (71). A first annular boss (73) is fixedly connected to the inner wall of the outer annular groove (71). An inner annular groove (74) is provided on the inner side of the top of the outer annular groove (71). A second sealing ring (75) is provided inside the inner annular groove (74). A second annular boss (76) is fixedly connected to the inner wall of the inner annular groove (74). The lower surface of the upper outer shield (1) is in contact with the first sealing ring (72) and the second sealing ring (75) respectively. The bottom end of the upper outer shield (1) is fixedly connected to the mounting sleeve (77). The surface of the mounting sleeve (77) is provided with several fastening bolts (78). One end of the fastening bolt (78) passes through the inside of the mounting sleeve (77) and is threaded to the side wall of the lower outer shield (2).

2. The novel thermal insulation shielding cover for fiber optic rings according to claim 1, characterized in that: The fastening bolts (78) are arranged in a circular pattern, and two adjacent fastening bolts (78) are set at a 90-degree angle with the center point of the mounting sleeve (77) as the axis.

3. A novel thermal insulation shielding cover for fiber optic rings according to claim 1, characterized in that: The upper outer shield (1) is provided with an upper inner shield (11) below it, and the lower outer shield (2) is provided with a lower inner shield (21) on its inner wall.

4. A novel thermal insulation shielding cover for fiber optic rings according to claim 3, characterized in that: An upper honeycomb core interlayer (3) is provided between the upper outer shield (1) and the upper inner shield (11), and a lower honeycomb core interlayer (4) is provided between the lower outer shield (2) and the lower inner shield (21).

5. A novel thermal insulation shielding cover for fiber optic rings according to claim 4, characterized in that: The upper inner shield (11) is fitted into the top slot of the lower inner shield (21), and the lower surface of the upper honeycomb core interlayer (3) is in contact with the top of the lower honeycomb core interlayer (4).

6. A novel thermal insulation shielding cover for fiber optic rings according to claim 5, characterized in that: An optical fiber ring body (6) is provided between the upper inner shield (11) and the lower inner shield (21). Flexible magnetic pads (5) are provided on both sides of the optical fiber ring body (6). The flexible magnetic pads (5) are fixedly connected to the inner wall of the lower inner shield (21).

7. A novel thermal insulation shielding cover for fiber optic rings according to claim 3, characterized in that: The upper outer shield (1) and the lower outer shield (2) are made of nickel-iron soft magnetic alloy, and the upper inner shield (11) and the lower inner shield (21) are made of permalloy.

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