Optical fiber cabin-penetrating sealing assembly and sealing box thereof

Abstract

The invention discloses an optical fiber cabin-penetrating sealing assembly and a sealing box thereof, belongs to the technical field of electrical connection, and solves the problem that in the prior art, the sealing performance of a rubber sealing piece on an optical fiber is greatly reduced in a long-term low-temperature environment, and the technical scheme for solving the problem is mainly the optical fiber cabin-penetrating sealing assembly. Comprising a first connector in sealed connection with an optical fiber and a socket shell, a taper hole is formed in the socket shell, the optical fiber is sleeved with a taper sleeve matched with the taper hole, and an elastic piece is arranged between the first connector and the taper sleeve. The elastic piece applies axial force to extrude the conical sleeve on the inner wall of the conical hole, the elastic piece deforms to generate pre-pressure, and meanwhile the conical sleeve deforms inwards in the radial direction to press the optical fiber to form sealing. The sealing element is mainly used for keeping the sealing performance of the sealing element in a low-temperature environment.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connection, and in particular to an optical fiber penetration sealing assembly and a sealing box thereof. Background Art

[0002] With the rapid development of aerospace technology, the amount of data processed and transmitted by equipment has increased dramatically. Conventional electrical signal transmission can no longer meet the requirements of high-speed and large-capacity data transmission. Optical fiber communication is gradually replacing traditional electrical signal transmission with its many advantages such as high bandwidth, large communication capacity, low loss, anti-electromagnetic interference, good confidentiality, and light weight. The optical fiber cabin sealing component is usually installed on the storage box, with one end placed in the storage box for connecting the information transmission system in the storage box, and the other end exposed outside the storage box to realize the transmission of digital optical signals between the load inside and outside the box. The optical fiber cabin sealing component must not only ensure reliable sealing connection with the storage box and stable transmission of optical signals, but also meet the sealing requirements of leakage rate ≤1×10-5Pa·m3 / s under the temperature alternating environment of -45℃~+125℃ and the pressure of 1.2MPa in the box.

[0003] Patent CN1670554A uses a sealing rubber pad to seal the optical fiber, and patent CN104155726B achieves optical fiber sealing by compressing a metal pressure ring and an elastic sealing material sleeve to clamp the optical fiber. However, the above method can only be used within the normal temperature range. Under low temperature for a long time, the elasticity of the rubber part deteriorates, which greatly reduces the sealing performance and poor sealing reliability. Summary of the invention

[0004] In order to overcome the problem in the prior art that the sealing performance of rubber seals on optical fibers is greatly reduced in a long-term low-temperature environment, the present application provides an optical fiber penetration sealing assembly that can maintain the sealing performance of the seal in a low-temperature environment.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: an optical fiber penetration sealing assembly, comprising a first connector and a socket shell sealed with an optical fiber, the socket shell being provided with a mounting hole, the optical fiber jacket being provided with an elastic sleeve adapted to the mounting hole, a pre-tightened elastic member being provided between the first connector and the elastic sleeve, when the first connector is sealed and connected to the socket shell, the elastic member applies an axial force to squeeze the elastic sleeve against the inner wall of the mounting hole, and causes the elastic sleeve to deform radially, so that the inner wall of the elastic sleeve is tightly sealed against the outer surface of the optical fiber and the outer surface of the elastic sleeve is tightly sealed against the inner wall of the mounting hole.

[0006] After adopting the above technical scheme, the present application has the following advantages: the sealing method in the prior art mainly relies on rubber seals. When the temperature in the environment drops and the environment is in a low temperature environment for a long time, the elasticity of the rubber parts deteriorates, and the sealing performance of the optical fiber is greatly reduced. However, the present scheme adopts the method of matching the elastic sleeve and the mounting hole, and uses the elastic part to apply a certain pre-pressure to the elastic sleeve. When the elastic sleeve axially squeezes the mounting hole, due to the adaptation between the mounting hole and the elastic sleeve, a tight sealing effect is generated between the inner wall of the mounting hole and the outer surface of the elastic sleeve. Also, due to the adaptation between the mounting hole and the elastic sleeve, the axial pre-pressure of the elastic part is converted into a radial force of the radial inward deformation of the elastic sleeve, so that a tight sealing effect is also formed between the inner wall of the elastic sleeve and the outer surface of the optical fiber, ensuring that after the ambient temperature drops, the original pre-pressure of the elastic part is released, so that the original surface pressure between the elastic sleeve and the mounting hole is maintained, and the original surface pressure between the elastic sleeve and the optical fiber is also maintained, ensuring that its sealing performance will not be reduced due to the temperature drop. The present scheme is mainly composed of a first connector, a socket housing, an elastic sleeve and an elastic part, and the structure is relatively simple. The various components cooperate with each other to achieve the sealing function, and no complicated additional devices are required. While ensuring the sealing effect, it is also easy to manufacture, install and maintain, and reduces the overall cost.

[0007] Furthermore, a cover plate is provided between the elastic member and the first connector. When the first connector is sealed and connected to the socket housing, the first connector pushes the cover plate and brings the elastic member close to the elastic sleeve in the mounting hole, so that the elastic member is compressed and deformed under the extrusion of the cover plate and the elastic sleeve, thereby generating pre-pressure on the elastic sleeve.

[0008] The above technical solution is adopted, by arranging a cover plate between the elastic member and the first connector, when the first connector is sealed and connected to the socket housing, the first connector pushes the cover plate, so that the elastic member is compressed and deformed under the pressure of the cover plate and the elastic sleeve. This structure ensures that the connection between the first connector and the socket housing will not affect the push of the cover plate on the elastic member, so that the first connector can adopt a variety of connection methods according to the working conditions, and the extrusion force applied by the cover plate to the elastic member is relatively stable, and by using the cover plate, the cover plate can simultaneously apply pressure to each elastic member, and at the same time, each elastic sleeve is squeezed into the mounting hole by the elastic member.

[0009] Furthermore, a sleeve is provided between the elastic sleeve and the elastic member, the mounting hole comprises a conical section and a cylindrical section with a large diameter extending from the conical section, the elastic sleeve is matched with the conical section, and the sleeve is matched with the cylindrical section.

[0010] By adopting the above-mentioned technical solution, a sleeve is arranged between the elastic sleeve and the elastic part. When the elastic part applies pressure, the contact area between the sleeve and the elastic sleeve is relatively larger and the force is more evenly applied, thereby preventing the elastic sleeve from being subjected to excessive force in some areas and insufficient force in some areas, thereby affecting the overall sealing performance. Since the elastic sleeve is adapted to the tapered section, when the tapered elastic sleeve is squeezed toward the tapered section with a small diameter, the elastic sleeve will fit tightly against the optical fiber and achieve a better sealing effect. In addition, the sleeve is adapted to the cylindrical section of the mounting hole. When the elastic part applies pressure, the sleeve can play a supporting and guiding role in the cylindrical section, thereby preventing the elastic sleeve from being excessively tilted or offset when subjected to axial force.

[0011] Furthermore, the sleeve is provided with a receiving cavity adapted to the elastic member, and the elastic member can partially extend out of the receiving cavity when not under stress.

[0012] With the aforementioned technical solution, the sleeve is provided with a housing cavity adapted to the elastic member, and the elastic member can partially extend out of the housing cavity when not under stress. This means that when the elastic member is compressed, it has enough space to deform. During the sealing process, the elastic member can fully transmit the axial force to the elastic sleeve, so that the elastic sleeve can better squeeze the inner wall of the mounting hole. Since the elastic member has sufficient deformation space, it can produce a larger range of pre-pressure changes, so that it can more flexibly adapt to different working conditions, such as maintaining the sealing effect through different degrees of deformation of the elastic member under different temperature and pressure environments.

[0013] Furthermore, one of the socket housing and the cover plate is provided with an axially extending guide member, and the other is provided with a guide hole adapted and corresponding to the guide member, and the guide member is inserted into the guide hole when the cover plate is close to the socket housing to fix the cover plate to the socket housing circumferentially.

[0014] By adopting the above-mentioned technical solution, the cooperation of the guide member and the guide hole provides accurate positioning and guidance for the assembly of the cover plate and the socket housing. During the assembly process, the guide member is inserted into the guide hole so that the cover plate can move along a specific axial path, ensuring the accuracy of the relative position of the cover plate and the socket housing, and the circumferential fixation of the cover plate and the socket housing can prevent the optical fiber from being pulled and damaged due to the rotation of the cover plate, avoiding various external forces on the components due to possible vibration, pressure changes or temperature changes in actual work. Without such circumferential fixation, the cover plate may rotate.

[0015] Furthermore, the first connector is threadedly connected to the socket housing.

[0016] By adopting the above-mentioned technical solution, a good sealing connection relationship can be formed between the first connector and the socket through the threaded connection, so that the optical fiber is isolated from the outside world, and due to the presence of the cover plate, the threaded connection of the first connector will not affect the axial force applied to the elastic member.

[0017] Furthermore, it also includes a second connector, which is sealed and connected to an end of the socket housing away from the first connector, so that the optical fiber is isolated from the outside air when passing through the first connector, the socket housing and the second connector in sequence.

[0018] By adopting the above technical solution, a second connector is added and sealed to the end of the socket housing away from the first connector, so that the optical fiber can be completely isolated from the outside air during the process of passing through the first connector, the socket housing and the second connector in sequence. This can prevent dust, water vapor and other impurities from entering the sealing component, further improve the overall sealing of the sealing component, and ensure the stability of optical signal transmission.

[0019] Furthermore, the second connector is provided with an extension portion extending into the inner wall of the socket housing, and a sealing ring is provided on the outer sleeve of the extension portion to form a seal when the second connector is connected to the socket housing.

[0020] By adopting the above-mentioned technical solution, a sealing ring is set up and its good elastic deformation ability is utilized. When the second connector is connected to the socket housing, the gap between the two can be tightly filled, thereby effectively preventing gas leakage, significantly enhancing the sealing performance, and ensuring that the external environment will not affect the internal optical fiber transmission.

[0021] Furthermore, the second connecting head is provided with a shoulder having a diameter larger than the connecting port of the socket housing, the second connecting head is provided with a connecting sleeve for threaded connection with the socket housing, and the connecting sleeve is provided with an abutment portion for abutting the axial surface of the shoulder away from the socket housing, so that the second connecting head is pulled toward the socket housing when the connecting sleeve is connected to the socket housing.

[0022] By adopting the above-mentioned technical solution, through the design of the shaft shoulder, the connecting sleeve and the abutment part, when the connecting sleeve is threadedly connected to the socket housing, the abutment part abuts against the shaft shoulder, pulling the second connecting head toward the socket housing so that the two are tightly fitted. This connection method can withstand certain external forces, such as vibrations and impacts that may occur during the operation of aerospace equipment, to ensure that the connection part will not loosen easily, thereby ensuring the stability of the overall structure of the sealing assembly. Since the connecting sleeve pulls the second connecting head tightly toward the socket housing, the sealing ring is better squeezed and can more effectively fill the gap between the two, further improving the sealing performance.

[0023] A sealing box comprises the above-mentioned optical fiber penetration sealing assembly, the sealing box is provided with a penetration opening whose size is compatible with the socket shell in the optical fiber penetration sealing assembly, a flange is fixedly provided on the outside of the socket shell, the sealing box is provided with mounting holes corresponding to the through holes on the flange, an airtight ring is provided between the socket shell and the penetration opening, and when the flange is fixedly connected to the sealing box, the airtight ring forms a sealed isolation between the outside and the inside of the sealing box.

[0024] By adopting the aforementioned technical solution and the above-mentioned optical fiber penetration sealing assembly, the optical fiber is sealed and isolated from the outside world from the inside of the socket shell, ensuring the stable environment required for optical signal transmission. On this basis, a special sealing design is carried out for the connection between the sealing box and the penetration sealing assembly to further improve the overall sealing performance. When the flange is fixedly connected to the sealing box, the airtight ring is squeezed and deformed, tightly filling the tiny gap between the socket shell and the outer wall of the sealing box, effectively preventing the leakage of gas and other media, ensuring that a reliable sealed space is formed inside the sealing box, and meeting the sealing requirements under specific pressure and temperature environments. The sealing of the optical fiber penetration sealing assembly itself and the sealing between the flange and the sealing box are combined to form a multiple sealing system. This multiple protection mechanism improves the reliability of the sealing box under different working conditions. Even in high-demand and complex environments such as aerospace, facing factors such as temperature alternation and pressure changes, it can effectively maintain the sealing performance and ensure the stability of the internal equipment and optical fiber signal transmission in the sealing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present application is further described below in conjunction with the accompanying drawings: Figure 1 A schematic diagram of an optical fiber penetration sealing assembly of the present application; Figure 2 for Figure 1 A in the enlarged view; Figure 3 It is a partial cross-sectional schematic diagram of a sealed box.

[0026] Description of the drawings: 1. optical fiber; 11. elastic sleeve; 2. first connector; 3. socket housing; 31. mounting hole; 32. conical section; 33. cylindrical section; 34. guide member; 35. flange; 4. elastic member; 5. cover plate; 51. guide hole; 6. sleeve; 61. accommodating chamber; 7. second connector; 71. extension portion; 72. sealing ring; 73. shoulder; 74. connecting sleeve; 75. abutment portion; 8. sealing box; 81. hatch; 82. mounting hole; 83. airtight ring; 9. O-ring groove. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0028] The terms "first", "second", etc. (if any) in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish before a certain technical feature, it does not necessarily indicate that it has "first". It should be understood that in this application, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in this application, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0029] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0030] like Figures 1 to 3 As shown, the present application provides an optical fiber penetration sealing assembly, including a first connector 2 and a socket shell 3 which are sealingly connected to an optical fiber 1, wherein a mounting hole 31 is provided in the socket shell 3, and an elastic sleeve 11 which is adapted to the mounting hole 31 is provided on the outer cover of the optical fiber 1, and a pre-tightened elastic member 4 is provided between the first connector 2 and the elastic sleeve 11. When the first connector 2 is sealingly connected to the socket shell 3, the elastic member 4 applies an axial force to squeeze the elastic sleeve 11 against the inner wall of the mounting hole 31, and causes the elastic sleeve 11 to deform radially, so that the inner wall of the elastic sleeve 11 is tightly sealed against the outer surface of the optical fiber 1, and the outer surface of the elastic sleeve 11 is tightly sealed against the inner wall of the mounting hole 31.

[0031] After adopting the above technical solution, the present application has the following advantages: the sealing method in the prior art mainly relies on rubber seals. When the temperature in the environment drops and is in a low temperature environment for a long time, the elasticity of the rubber parts deteriorates, and the sealing performance of the optical fiber 1 is greatly reduced. The present solution adopts the mode of matching the elastic sleeve 11 and the mounting hole 31, and uses the elastic member 4 to apply a certain pre-pressure to the elastic sleeve 11. When the elastic sleeve 11 axially squeezes the mounting hole 31, due to the adaptation between the mounting hole 31 and the elastic sleeve 11, a tight sealing effect is generated between the inner wall of the mounting hole 31 and the outer surface of the elastic sleeve 11. Also, due to the adaptation between the mounting hole 31 and the elastic sleeve 11, the axial pre-pressure of the elastic member 4 is converted into a radial force for the radial inward deformation of the elastic sleeve 11, so that a tight sealing effect is also formed between the inner wall of the elastic sleeve 11 and the outer surface of the optical fiber 1, ensuring that after the ambient temperature drops, the original pre-pressure of the elastic member 4 is released, so that the original surface pressure between the elastic sleeve 11 and the mounting hole 31 is maintained, and the original surface pressure between the elastic sleeve 11 and the optical fiber 1 is also maintained, ensuring that its sealing performance will not be reduced due to temperature drop. The present solution is mainly composed of the first connector 2, the socket housing 3, the elastic sleeve 11 and the elastic member 4, and the structure is relatively simple. The various components cooperate with each other to achieve the sealing function, and no complicated additional devices are required. While ensuring the sealing effect, it is also easy to manufacture, install and maintain, and reduces the overall cost.

[0032] Specifically, the optical fiber is φ0.9mm. When the external ambient temperature changes alternately between -40℃ and +125℃, the elastic compensation function of the elastic part can be used to maintain a constant pressure on the elastic sleeve, thereby realizing the sealing compensation function of the elastic sleeve for the optical fiber at low and high temperatures. When the elastic sleeve 11 squeezes the mounting hole 31, a tight sealing effect is generated between the inner wall of the mounting hole 31 and the outer surface of the elastic sleeve 11, and when the elastic sleeve 11 is deformed radially inward, a tight sealing effect is also formed between the inner wall of the elastic sleeve 11 and the outer surface of the optical fiber 1. It can be understood that there are multiple optical fibers 1 on the first connector 2, and the number of mounting holes 31 corresponds to the number of optical fibers 1, so that each optical fiber 1 can be independently sealed. The axial and radial directions mentioned above are relative to the axis of the optical fiber 1.

[0033] Preferably, the elastic member 4 is a spring, elastic rubber, etc., and the material of the elastic sleeve 11 can still maintain a certain elasticity in a low temperature environment so that it can undergo a certain amount of deformation, such as silicone rubber, fluororubber, etc. The elastic member 4 is sleeved on the outer periphery of the optical fiber 1 and applies axial force to the elastic sleeve 11.

[0034] Furthermore, a cover plate 5 is provided between the elastic member 4 and the first connector 2. When the first connector 2 is sealed and connected to the socket housing 3, the first connector 2 pushes the cover plate 5 and brings the elastic member 4 close to the elastic sleeve 11 in the mounting hole 31, so that the elastic member 4 is compressed and deformed under the extrusion of the cover plate 5 and the elastic sleeve 11, thereby generating pre-pressure on the elastic sleeve 11.

[0035] By adopting the above technical solution, by arranging the cover plate 5 between the elastic member 4 and the first connector 2, when the first connector 2 is sealed and connected with the socket housing 3, the first connector 2 pushes the cover plate 5, so that the elastic member 4 is compressed and deformed under the pressure of the cover plate 5 and the elastic sleeve 11. This structure makes it possible for the connection between the first connector 2 and the socket housing 3 not to affect the push of the elastic member 4 by the cover plate 5, so that the first connector 2 can adopt a variety of connection methods according to the working conditions, and the extrusion force applied by the cover plate 5 to the elastic member 4 is relatively stable, and by using the cover plate 5, the cover plate 5 can simultaneously apply pressure to each elastic member 4, and at the same time, each elastic sleeve 11 is squeezed into the mounting hole 31 by the elastic member 4.

[0036] Furthermore, a sleeve 6 is provided between the elastic sleeve 11 and the elastic member 4 , the mounting hole 31 includes a conical section 32 and a cylindrical section 33 extending from the conical section 32 with a large diameter, the elastic sleeve 11 is adapted to the conical section 32 , and the sleeve 6 is adapted to the cylindrical section 33 .

[0037] By adopting the above-mentioned technical solution, a sleeve 6 is arranged between the elastic sleeve 11 and the elastic member 4. When the elastic member 4 applies pressure, the contact area between the sleeve 6 and the elastic sleeve 11 is relatively larger, and the force is more evenly applied, thereby preventing the elastic sleeve 11 from being subjected to excessive force in some areas and insufficient force in some areas, thereby affecting the overall sealing performance. Since the elastic sleeve 11 is adapted to the tapered section 32, when the tapered elastic sleeve 11 is squeezed toward the tapered section 32 with a small diameter, the elastic sleeve 11 will fit tightly against the optical fiber 1, thereby achieving a better sealing effect. In addition, the sleeve 6 is adapted to the cylindrical section 33 of the mounting hole 31. When the elastic member 4 applies pressure, the sleeve 6 can play a supporting and guiding role in the cylindrical section 33, thereby preventing the elastic sleeve 11 from being excessively tilted or offset when subjected to axial force.

[0038] Specifically, the diameter of the tapered section 32 gradually increases from a direction away from the first connector 2 to a direction close to the first connector 2 , so that the elastic member 4 squeezes the elastic sleeve 11 toward the small diameter of the tapered section 32 .

[0039] It can be understood that in another embodiment, the mounting hole 31 is a complete cylindrical hole, and the elastic sleeve 11 and the sleeve 6 are both adapted to the cylindrical hole.

[0040] In other embodiments, the mounting hole 31 is in other shapes, and it is only necessary for the elastic sleeve 11 and the mounting hole 31 to be compatible.

[0041] Furthermore, the sleeve 6 is provided with a receiving cavity 61 adapted to the elastic member 4 , and the elastic member 4 can partially extend out of the receiving cavity 61 when not under stress.

[0042] With the aforementioned technical solution, the sleeve 6 is provided with a receiving cavity 61 adapted to the elastic member 4, and the elastic member 4 can partially extend out of the receiving cavity 61 when not under stress. This means that when the elastic member 4 is compressed, it has enough space to deform. During the sealing process, the elastic member 4 can fully transmit the axial force to the elastic sleeve 11, so that the elastic sleeve 11 can better squeeze the inner wall of the mounting hole 31. Since the elastic member 4 has enough deformation space, it can produce a larger range of pre-pressure changes, so that it can more flexibly adapt to different working conditions, such as maintaining the sealing effect through different degrees of deformation of the elastic member 4 under different temperature and pressure environments.

[0043] Furthermore, one of the socket housing 3 and the cover plate 5 is provided with an axially extending guide member 34, and the other is provided with a guide hole 51 adapted and corresponding to the guide member 34. When the cover plate 5 is close to the socket housing 3, the guide member 34 is inserted into the guide hole 51 to fix the cover plate 5 to the socket housing 3 circumferentially.

[0044] By adopting the above technical solution, the cooperation of the guide member 34 and the guide hole 51 provides accurate positioning and guidance for the assembly of the cover plate 5 and the socket housing 3. During the assembly process, the guide member 34 is inserted into the guide hole 51, so that the cover plate 5 can move along a specific axial path, ensuring the accuracy of the relative position of the cover plate 5 and the socket housing 3, and the circumferential fixation of the cover plate 5 and the socket housing 3 can prevent the cover plate 5 from rotating and causing the optical fiber 1 to be pulled and damaged, avoiding various external forces that may be applied to the components due to possible vibrations, pressure changes or temperature changes in actual work. Without such circumferential fixation, the cover plate 5 may rotate.

[0045] Furthermore, the first connector 2 and the socket housing 3 are threadedly connected.

[0046] By adopting the above-mentioned technical solution, a good sealing connection relationship can be formed between the first connector 2 and the socket through a threaded connection, so that the optical fiber 1 is isolated from the outside world, and due to the presence of the cover plate 5, the threaded connection of the first connector 2 will not affect the axial force applied to the elastic part 4.

[0047] Specifically, the first connector 2 includes a wrapping portion 97 that forms a sealing relationship with the optical fiber 1, and a connecting portion 96 that is threadedly connected to the socket housing 3. The wrapping portion 97 and the connecting portion 96 are in a rotationally connected relationship and have a sealing relationship, so that the rotation required for the threaded connection of the connecting portion 96 will not affect the optical fiber 1, thereby avoiding driving the optical fiber 1 to rotate together during rotation.

[0048] Furthermore, it also includes a second connector 7, which is sealed and connected to an end of the socket housing 3 away from the first connector 2, so that the optical fiber 1 is isolated from the outside air when passing through the first connector 2, the socket housing 3 and the second connector 7 in sequence.

[0049] By adopting the above technical solution, the second connector 7 is added and sealed to the end of the socket housing 3 away from the first connector 2, so that the optical fiber 1 can be completely isolated from the outside air during the process of passing through the first connector 2, the socket housing 3 and the second connector 7 in sequence. In this way, dust, water vapor and other impurities from the outside can be prevented from entering the interior of the sealing component, further improving the sealing performance of the sealing component as a whole, and ensuring the stability of optical signal transmission.

[0050] Furthermore, the second connector 7 is provided with an extension portion 71 extending into the inner wall of the socket housing 3 , and a sealing ring 72 is provided on the outer sleeve of the extension portion 71 to form a seal when the second connector 7 is connected to the socket housing 3 .

[0051] By adopting the above-mentioned technical solution, by setting a sealing ring 72 and utilizing its good elastic deformation ability, when the second connector 7 is connected to the socket housing 3, the gap between the two can be tightly filled, thereby effectively preventing gas leakage, significantly enhancing the sealing performance, and ensuring that the external environment will not affect the transmission of the internal optical fiber 1.

[0052] Furthermore, the second connecting head 7 is provided with a shoulder 73 whose diameter is larger than the connecting port of the socket housing 3, and the second connecting head 7 is provided with a connecting sleeve 74 for threaded connection with the socket housing 3, and the connecting sleeve 74 is provided with an abutting portion 75 for abutting the axial surface of the shoulder 73 away from the socket housing 3, so that the second connecting head 7 is pulled toward the socket housing 3 when the connecting sleeve 74 is connected to the socket housing 3.

[0053] By adopting the above-mentioned technical solution, through the design of the shaft shoulder 73, the connecting sleeve 74 and the abutment 75, when the connecting sleeve 74 is threadedly connected to the socket housing 3, the abutment 75 abuts against the shaft shoulder 73, and pulls the second connecting head 7 toward the socket housing 3, so that the two are tightly fitted. This connection method can withstand certain external forces, such as vibrations and impacts that may occur during the operation of aerospace equipment, to ensure that the connection part will not loosen easily, and to ensure the stability of the overall structure of the sealing assembly. Since the connecting sleeve 74 pulls the second connecting head 7 tightly toward the socket housing 3, the sealing ring 72 is better squeezed and can more effectively fill the gap between the two, further improving the sealing performance.

[0054] A sealing box comprises the above-mentioned optical fiber penetration sealing assembly, wherein the sealing box 8 is provided with a penetration opening 81 whose size is compatible with the socket shell 3 in the optical fiber penetration sealing assembly, the socket shell 3 is fixedly provided with a flange 35 on the outside, the sealing box 8 is provided with mounting holes 82 corresponding to the through holes on the flange 35, and an airtight ring 83 is provided between the socket shell 3 and the penetration opening 81. When the flange 35 is fixedly connected to the sealing box 8, the airtight ring 83 forms a sealed isolation between the outside and the inside of the sealing box 8.

[0055] By adopting the above-mentioned technical solution and the above-mentioned optical fiber penetration sealing assembly, the optical fiber 1 is sealed and isolated from the outside world from the inside of the socket shell 3, ensuring the stable environment required for optical signal transmission. On this basis, a special sealing design is carried out for the connection between the sealing box 8 and the penetration sealing assembly to further improve the overall sealing performance. When the flange 35 is fixedly connected to the sealing box 8, the airtight ring 83 is squeezed and deformed, tightly filling the tiny gap between the socket shell 3 and the outer wall of the sealing box 8, effectively preventing the leakage of gas and other media, ensuring that a reliable sealed space is formed inside the sealing box 8, and meeting the sealing requirements under specific pressure and temperature environments. The sealing of the optical fiber 1 penetration sealing assembly itself and the sealing between the flange 35 and the sealing box 8 form a multiple sealing system. This multiple protection mechanism improves the reliability of the sealing box 8 under different working conditions. Even in high-demand and complex environments such as aerospace, in the face of temperature alternation, pressure changes and other factors, it can effectively maintain the sealing performance and ensure the stability of the internal equipment of the sealing box 8 and the signal transmission of the optical fiber 1.

[0056] Specifically, the socket housing 3 is provided with a flange 35 , and the flange 35 is provided with an O-ring groove 9 .

[0057] In addition to the above-mentioned preferred embodiments, the present application also has other implementation modes. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present application.

Claims

1. An optical fiber penetration sealing assembly, characterized in that: It comprises a first connector and a socket housing which are sealed with the optical fiber, wherein a mounting hole is arranged in the socket housing, and an elastic sleeve which is adapted to the mounting hole is arranged on the outer sleeve of the optical fiber, and a pre-tightened elastic member is arranged between the first connector and the elastic sleeve. When the first connector is sealed with the socket housing, the elastic member applies an axial force to squeeze the elastic sleeve against the inner wall of the mounting hole and causes the elastic sleeve to deform radially, so that the inner wall of the elastic sleeve is tightly sealed against the outer surface of the optical fiber and the outer surface of the elastic sleeve is tightly sealed against the inner wall of the mounting hole.

2. The optical fiber penetration sealing assembly according to claim 1, characterized in that: A cover plate is provided between the elastic member and the first connector. When the first connector is sealed and connected to the socket housing, the first connector pushes the cover plate and brings the elastic member close to the elastic sleeve in the mounting hole, so that the elastic member is compressed and deformed under the extrusion of the cover plate and the elastic sleeve, thereby generating pre-pressure on the elastic sleeve.

3. The optical fiber penetration sealing assembly according to claim 2, characterized in that: A sleeve is provided between the elastic sleeve and the elastic member, the mounting hole comprises a conical section and a cylindrical section with a large diameter extending from the conical section, the elastic sleeve is matched with the conical section, and the sleeve is matched with the cylindrical section.

4. The optical fiber penetration sealing assembly according to claim 3, characterized in that: The sleeve is provided with a receiving cavity adapted to the elastic member, and the elastic member can partially extend out of the receiving cavity when not under stress.

5. The optical fiber penetration sealing assembly according to claim 2, characterized in that: One of the socket housing and the cover plate is provided with an axially extending guide member, and the other is provided with a guide hole adapted and corresponding to the guide member. When the cover plate is close to the socket housing, the guide member is inserted into the guide hole to fix the cover plate and the socket housing circumferentially.

6. The optical fiber penetration sealing assembly according to claim 2, characterized in that: The first connector is threadedly connected to the socket housing.

7. The optical fiber penetration sealing assembly according to claim 1, characterized in that: It also includes a second connector, which is sealed and connected to an end of the socket housing away from the first connector, so that the optical fiber is isolated from the outside air when passing through the first connector, the socket housing and the second connector in sequence.

8. The optical fiber cabin sealing box according to claim 7, characterized in that: The second connector is provided with an extension portion extending into the inner wall of the socket housing, and a sealing ring is provided on the outer sleeve of the extension portion to form a seal when the second connector is connected to the socket housing.

9. The optical fiber cabin sealing box according to claim 7, characterized in that: The second connecting head is provided with a shoulder having a diameter larger than the connecting port of the socket housing, and the second connecting head is provided with a connecting sleeve for threaded connection with the socket housing, and the connecting sleeve is provided with an abutting portion for abutting the axial surface of the shoulder away from the socket housing, so that the second connecting head is pulled toward the socket housing when the connecting sleeve is connected to the socket housing.

10. A sealed box, comprising any optical fiber penetration sealing assembly according to any one of claims 1 to 9, characterized in that: The sealing box is provided with a hatch opening whose size is compatible with the socket shell in the optical fiber hatch sealing assembly, a flange is fixedly provided on the outside of the socket shell, and the sealing box is provided with mounting holes corresponding to the through holes on the flange. An airtight ring is provided between the socket shell and the hatch opening. When the flange is fixedly connected to the sealing box, the airtight ring forms a sealed isolation between the outside and the inside of the sealing box.

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