Optical cable butt joint structure used in vacuum cavity or oil
By designing the optical cable docking structure in the oil-immersed transformer and adopting the docking sleeve and threaded connection method, the problems of partial discharge and uneven electric field during optical cable docking are solved, and the reliability and convenience of optical cable docking are achieved, which is easy to maintain.
Patent Information
- Application Number
- CN202422857891.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the prior art, the problems of connecting and maintaining optical cables in oil-immersed transformers have not been effectively solved. In particular, when connecting in oil, partial discharge or uneven electric field may occur, and the optical cable interface is inconvenient to disassemble and assemble.
An optical cable docking structure is designed, including a docking sleeve, an optical fiber docking joint, a connector, a locking bolt and a limiter. Through threaded connection and through-hole design, the reliability and convenience of optical fiber docking are ensured, partial discharge and electric field unevenness are avoided, and maintenance in abnormal situations is facilitated.
The reliability and convenience of optical cable docking are achieved, partial discharge and electric field unevenness are avoided, the practicality of the optical cable docking structure is improved, and maintenance operations in abnormal situations are facilitated.
Smart Images
Figure CN223436138U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vacuum cavity or oil in the optical fiber butt joint technical field, concretely is a kind of optical cable butt joint structure for vacuum cavity or in oil. BACKGROUND
[0002] Optical fiber can be used for sensing or communication in some harsh environments (such as oil-immersed transformer, GIS, plasma, etc.) due to its insulation, intrinsic immunity to high-energy signals (electromagnetic waves, nuclear, X-rays, etc.), small size, high reliability, etc. For example, power transformers, as one of the core primary equipment of power systems, will affect the safe and stable operation of power systems when they exceed the service life or fail to operate and maintain, and the main reason for such phenomenon is usually the aging of internal insulation materials of the transformer. The temperature of the transformer rises due to loss during operation, which accelerates the aging rate of the insulation materials. Therefore, monitoring the temperature of the transformer (generally the theoretical hot spot temperature) is of great significance for maintaining the safe and stable operation of the transformer and guiding the thermal structure design.
[0003] Oil-immersed transformer temperature monitoring can use various sensors. Considering the operation safety, monitoring reliability, operation and maintenance portability and other factors, the present workers generally believe that the most suitable temperature sensor is an optical fiber temperature sensor. However, due to the special environment of oil filling inside the oil-immersed transformer, the arrangement and structure design of the optical fiber temperature sensor in this scenario are relatively strict. When the optical cable is externally connected to the cable, not only the accuracy of the optical cable butt joint should be considered, but also the protection of the cable interface and the full immersion of the transformer oil to ensure insulation should be considered.
[0004] However, the existing technology mainly considers the one-time installation of the sensor in the oil-immersed transformer, and does not consider the maintenance problem of the optical cable butt joint in oil or under abnormal conditions. Therefore, the development of an optical cable butt joint structure for vacuum cavity or oil is particularly important. UTILITY MODEL CONTENT
[0005] In view of the deficiencies of the prior art, the utility model aims to provide an optical cable butt joint structure for vacuum cavity or oil, which ensures the vacuum or oil filling inside the optical fiber butt joint structure by setting a through hole on the butt joint cylinder, avoids the problem of partial discharge or uneven electric field caused by insufficient vacuum or oil immersion, and adopts a threaded connection between the optical fiber butt joint and the butt joint cylinder, which facilitates the disassembly and assembly of the optical fiber butt joint, facilitates maintenance under abnormal conditions, and has high practicability.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] 18. The optical fiber connector of claim 17, wherein the at least one optical fiber connector of the plurality of optical fibers is connected to the plurality of optical fiber connectors. The plurality of optical fiber connectors of the plurality of optical fiber connectors are connected to the plurality of optical fiber connectors of the plurality of optical fiber connectors.
[0008] Preferably, the connecting piece is composed of a large-diameter cylindrical section and a small-diameter cylindrical section, and the locking bolt is sleeved on the outside of the small-diameter cylindrical section of the connecting piece.
[0009] Preferably, the locking bolt is clearance-fitted with the small-diameter cylindrical section of the connecting piece.
[0010] Preferably, an accommodating groove is provided at one end of the limiting member close to the connecting member, and the small-diameter cylindrical section of the connecting member is inserted into the accommodating groove of the limiting member for connection and fixation.
[0011] Preferably, a sealing ring is provided between the limiting member and the locking bolt, and the sealing ring is sleeved on the outside of the small-diameter cylindrical section of the connecting member.
[0012] Preferably, a limiting portion is provided between the internal thread portion and the docking portion, and when the optical fiber docking connector is installed in place, the limiting member is placed in the limiting portion.
[0013] Preferably, the diameters of the internal threaded portion, the limiting portion and the docking portion decrease in sequence.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] The utility model forms an optical fiber butt joint by assembling a connector, a locking bolt, a limiter, a connector and an optical cable, and then connects the two sets of optical fiber butt joints and installs them in the internal threaded part of the butt joint sleeve through the locking bolt, so that the optical connectors of the two sets of optical fiber butt joints are inserted into the butt joint sleeve and abut against each other to complete the butt joint, thereby realizing the butt joint and protection of the optical cables and ensuring the reliability of optical fiber butt joint. Through the through hole provided on the butt joint sleeve, the vacuum or oil filling inside the optical fiber butt joint structure is ensured, thereby avoiding the problem of partial discharge or uneven electric field caused by insufficient vacuum or oil immersion. In addition, the optical fiber butt joint and the butt joint sleeve are threadedly connected, which is convenient for the disassembly and assembly of the optical fiber butt joint and convenient for maintenance in abnormal situations, and has high practicality. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a front view structural schematic diagram of an optical cable butt joint structure used in a vacuum cavity or oil;
[0017] Figure 2 is a perspective view structural schematic diagram of an optical cable butt joint structure used in a vacuum cavity or oil;
[0018] Figure 3 is a sectional view structural schematic diagram of an optical cable butt joint structure used in a vacuum cavity or oil.
[0019] In the figure: 1, connecting piece; 101, large-diameter cylindrical segment; 102, small-diameter cylindrical segment; 2, locking bolt; 3, limiting piece; 4, sealing ring; 5, optical joint; 6, butt joint cylinder; 601, through hole; 602, internal thread part; 603, limiting part; 604, butt joint part. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0021] Embodiment: Please refer to Figure 1-Figure 3The embodiment provides a kind of optical cable butt joint structure for vacuum cavity or oil, including butt joint cylinder 6 and the optical fiber butt joint head respectively installed at both ends of butt joint cylinder 6, and the optical fiber butt joint head includes connecting piece 1, locking bolt 2, limiting piece 3 and optical joint 5, the through hole is opened in the center of connecting piece 1 along the axial direction, the through hole of connecting piece 1 is used to accommodate fixed optical cable, locking bolt 2 is sleeved on the outside of connecting piece 1, limiting piece 3 is connected to one end of connecting piece 1 close to butt joint cylinder 6, limiting piece 3 is internally provided with mounting hole, and one end of optical joint 5 is fixedly connected in the mounting hole of limiting piece 3, the inside of butt joint cylinder 6 is provided with installation slot along the axial direction, and the installation slot includes the internal thread part 602 symmetrically provided at both ends of butt joint cylinder 6 and the butt joint part 604 provided at the intermediate position of butt joint cylinder 6 and penetrating two internal thread parts 602, the locking bolt 2 of two groups of optical fiber butt joint heads is respectively threadedly connected in the internal thread part 602 at both ends, and the optical joint 5 of two groups of optical fiber butt joint heads is inserted into butt joint part 604 and abuts, the through hole 601 is provided on the outer wall of butt joint cylinder 6 and penetrates installation slot, by connecting piece 1, locking bolt 2, limiting piece 3, joint 5 and optical cable are assembled to form optical fiber butt joint head, then two groups of optical fiber butt joint heads are connected and installed in the internal thread part 602 of butt joint cylinder 6 by locking bolt 2, so that the optical joint 5 of two groups of optical fiber butt joint heads is inserted into butt joint part 604 and abuts to complete butt joint, so that the coaxial butt joint of optical joint 5 is realized, the butt joint and protection of optical cable are realized, the optical fiber butt joint reliability is ensured, the through hole 601 is provided on butt joint cylinder 6 to ensure that the inside of optical fiber butt joint structure is vacuum or filled with oil, the problem that local discharge or electric field is uneven due to insufficient vacuum or oil immersion is avoided, and the optical fiber butt joint head and butt joint cylinder 6 are connected in threaded mode, the dismounting operation of optical fiber butt joint head is facilitated, maintenance is facilitated in abnormal time, and the practicability is high.
[0022] In the embodiment, the through hole 601 is preferably three groups, one group of through holes 601 communicates with the butt joint part 604, and the other two groups of through holes 601 respectively communicate with the two internal thread parts 602, to ensure that the inside of optical fiber butt joint structure is sufficiently vacuum or filled with oil.
[0023] In the embodiment, as Figure 3As shown, the connecting piece 1 is composed of a large-diameter cylindrical segment 101 and a small-diameter cylindrical segment 102, the locking bolt 2 is sleeved outside the small-diameter cylindrical segment 102 of the connecting piece 1, the containing groove is formed near one end of the connecting piece 1, the small-diameter cylindrical segment 102 of the connecting piece 1 is inserted into the containing groove of the limiting piece 3 and connected and fixed, the locking bolt 2 is sleeved outside the small-diameter cylindrical segment 102 of the connecting piece 1 as a component connected with the butt joint cylinder 6, the connecting piece 1 plays a limiting role by the large-diameter cylindrical segment 101 and the limiting piece 3, which is used to prevent the locking bolt 2 from being separated from the small-diameter cylindrical segment 102, through the clearance fit between the locking bolt 2 and the small-diameter cylindrical segment 102 of the connecting piece 1, the optical connector 5, the limiting piece 3, the connecting piece 1 and the optical cable connected by the connecting piece 1 will not rotate with the rotation of the locking bolt 2, so as to avoid the winding of the rear end of the optical cable, the damage of the assembly, the abrasion of the end face of the optical connector and the like.
[0024] In the embodiment, as shown in Figure 3 The limiting piece 3 is placed in the limiting part 603 when the optical fiber butt joint is installed in place, the internal thread part 602, the limiting part 603 and the butt joint part 604 are coaxially arranged and mutually penetrated, and the diameters are sequentially reduced, and the limiting part 603 is used to cooperate with the limiting piece 3 to prevent the optical fiber butt joint from shaking in the butt joint cylinder 6.
[0025] In the embodiment, as shown in Figure 3 The sealing ring 4 is sleeved outside the small-diameter cylindrical segment 102 of the connecting piece 1 between the limiting piece 3 and the locking bolt 2, the sealing ring 4 has a certain deformation amount, the optical connector 5 has a buffering effect when being butt jointed, the optical connector 5 is stably butt jointed, and the optical fiber butt joint is fixed in the butt joint cylinder 6 and cannot move relatively.
[0026] In the embodiment, the butt joint cylinder 6 is a symmetrical bamboo joint cylinder, a cylindrical structure, a cuboid and the like, and only needs to realize the butt joint function of the optical fiber butt joint; considering the temperature resistance, insulation and long-term reliability, the structural material is preferably a full dielectric material such as polyether ether ketone, tetrafluoro material, ceramic, glass and epoxy resin.
[0027] Working principle: in use, a group of optical fiber connector is placed into the adapter tube 6, the locking bolt 2 of the optical fiber connector is screwed with the internal thread part 602 of the adapter tube 6, and then the locking bolt 2 is tightened, when locking, because the locking bolt 2 and the connecting piece 1 are gap fit, so the optical joint 5, the limiting piece 3, the connecting piece 1 and the optical cable connected by the connecting piece 1 will not rotate with the rotation of the locking bolt 2, thereby avoiding the winding of the rear end of the optical cable, the damage of the assembly, the abrasion of the end face of the optical joint and the like, after locking, because of the cooperation of the sealing ring 4 and the limiting piece 3 and the thread cooperation of the locking bolt 2 and the adapter tube 6, the optical fiber adapter is fixed in the adapter tube and will not move relatively, then another group of optical fiber adapters is connected in the same way, thereby realizing the butt joint of the optical cable, the through hole 601 provided on the adapter tube 6 is used to ensure the vacuum or oil filling inside the optical fiber butt joint structure, and partial discharge or uneven electric field caused by insufficient vacuum or oil immersion is avoided.
[0028] The above embodiment is a preferred implementation scheme of the utility model, in addition to this, the utility model can be realized in other ways, and any obvious replacement under the premise of not departing from the technical scheme concept is within the protection scope of the utility model.
Claims
1. An optical cable docking structure for use in a vacuum cavity or in oil, characterized by: The invention comprises a butt joint (6) and optical fiber butt joints respectively installed at both ends of the butt joint (6), wherein the optical fiber butt joint comprises a connector (1), a locking bolt (2), a limiting member (3) and an optical connector (5), wherein a through hole is provided in the center of the connector (1) along the axial direction, the through hole of the connector (1) is used to accommodate and fix an optical cable, the locking bolt (2) is sleeved on the outside of the connector (1), the limiting member (3) is connected to one end of the connector (1) close to the butt joint (6), the limiting member (3) is provided with a mounting hole inside, and one end of the optical connector (5) is fixedly connected to the limiting member. (3), a mounting groove is provided in the interior of the docking tube (6) along the axial direction, and the mounting groove includes internal threaded parts (602) symmetrically provided at both ends of the docking tube (6) and a docking part (604) provided in the middle of the docking tube (6) and passing through the two internal threaded parts (602), the locking bolts (2) of the two groups of the optical fiber docking joints are respectively threadedly connected to the internal threaded parts (602) at both ends, the optical connectors (5) of the two groups of the optical fiber docking joints are inserted into the docking part (604) and abutted, and a through hole (601) passing through the mounting groove is provided on the outer wall of the docking tube (6).
2. The optical cable docking structure for use in a vacuum cavity or in oil according to claim 1, characterized in that: The connecting piece (1) is composed of a large-diameter column section (101) and a small-diameter column section (102), and the locking bolt (2) is sleeved on the outside of the small-diameter column section (102) of the connecting piece (1).
3. The optical cable docking structure for use in a vacuum cavity or in oil according to claim 2, characterized in that: The locking bolt (2) is clearance-fitted with the small-diameter column section (102) of the connecting piece (1).
4. The optical cable docking structure for use in a vacuum cavity or oil according to claim 2, characterized in that: An accommodating groove is provided at one end of the limiting member (3) close to the connecting member (1), and the small-diameter column section (102) of the connecting member (1) is inserted into the accommodating groove of the limiting member (3) for connection and fixation.
5. The optical cable docking structure for use in a vacuum cavity or in oil according to claim 4, characterized in that: A sealing ring (4) is provided between the limiting member (3) and the locking bolt (2), and the sealing ring (4) is sleeved on the outside of the small-diameter column section (102) of the connecting member (1).
6. The optical cable docking structure for use in a vacuum cavity or in oil according to claim 4, characterized in that: A limiting portion (603) is provided between the internal thread portion (602) and the docking portion (604); when the optical fiber docking connector is installed in place, the limiting member (3) is placed in the limiting portion (603).
7. The optical cable docking structure for use in a vacuum cavity or in oil according to claim 6, characterized in that: The diameters of the internal thread portion (602), the limiting portion (603) and the docking portion (604) decrease in sequence.