Single-ended connector box

Abstract

The present invention belongs to the technical field of optical cable joint boxes, and in particular, relates to a single-end joint box, including a first fixing component, a second fixing component, and an airtight component. The first fixing component and the second fixing component are used for parallel fixed-distance butt welding of optical cables and fixing the fiber core at the welding point with a half-circle arc relative to the optical cable. The airtight component is used to provide dust and water-proof protection for the welding point of the optical cable and to perform regular airtightness detection on the space where the welding point is located. The present invention can perform regular airtightness detection by blowing air from the air supply port into the annular space between the third ring sleeve and the shell cover. At the same time, leakage of the air supply port and the exhaust port itself will not affect the airtightness of the space where the welding point of the first optical cable and the four second optical cables is located.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cable joint boxes, and in particular relates to a single-end joint box. Background Art

[0002] A single-ended splice box is a device used for optical cable connection. It can connect two or more optical cables together and provide protection. Single-ended splice boxes are usually used in the construction of optical cable line projects to protect the optical fiber fusion part and ensure the quality and service life of the optical cable line.

[0003] The joint box needs to be dustproof and waterproof during use. The patent with application number 202310645805.0 seals the joint box against dust and water by adding a sealing gasket. However, the joint box cannot be regularly tested for air tightness after it is installed or has been used for a period of time. The foreseeable technology to solve this problem is to open an air hole on the joint box, blow air inward through the air hole to identify the pressure holding capacity in the joint box, and complete the air tightness test in the joint box. However, the air hole has become a new potential leakage point, which greatly increases the risk of air leakage in the joint box.

[0004] In order to facilitate the fusion splicing of two optical cables, the joint box needs to accommodate a longer core fiber of the optical cable. After the fusion splicing of the core fibers is completed, a soft sleeve is put on the fusion splicing point to protect it, and the excess length of the core fiber is wound and fixed in the fusion fiber tray. In the process of winding and fixing the core fiber, the winding of the core fiber is time-consuming and there is a risk of the core fiber breaking during the winding process.

[0005] The present invention improves the structure of the joint box to design a structure capable of detecting its air tightness. At the same time, after the core fiber of the optical cable is fused, the core fiber has basically no excess length and the core fiber does not need to be wound to complete the fixed sealing of the core fiber on the fiber splicing tray, and the operation efficiency is high.

[0006] The present invention designs a single-end junction box to solve the above problems. Summary of the invention

[0007] Based on this, it is necessary to provide a single-end joint box to address the problems existing in the current single-end joint box. The present invention can perform regular air tightness detection by blowing air from the air supply port into the annular space between the third ring sleeve and the shell cover. Leakage of the air supply port and the exhaust port themselves in the present invention will not affect the air tightness of the space where the fusion points of the first optical cable and the four second optical cables are located. The present invention can achieve parallel butt welding of the first core fiber in the first optical cable and the second core fiber in the second optical cable through the first fixing component and the second fixing component, ensuring that the length of the first core fiber and the second core fiber in the shell cover is relatively short and the fused first core fiber and the second core fiber can be fixed on the first plate, the semicircular plate and the second plate without large-scale multi-turn winding, thereby avoiding the first core fiber and the second core fiber from breaking while improving the efficiency of the fusion installation and fixing operation of the first core fiber in the first optical cable and the second core fiber in the second optical cable.

[0008] The above purpose is achieved through the following technical solutions:

[0009] A single-end splice box, used for optical cable fusion splicing and protecting the fusion point of the optical cable, comprising:

[0010] The first fixing assembly and the second fixing assembly are used for parallel fixed-distance butt welding of optical cables and fixing the fiber core at the welding point with a half-circle arc bend relative to the optical cable.

[0011] The airtight component is used to protect the optical cable fusion point from dust and water and to perform regular airtightness testing on the space where the fusion point is located.

[0012] In one embodiment, the first fixing component includes a first semicircular disk, a first insertion hole is provided on the first semicircular disk, the first insertion hole is located on the line connecting the midpoints of the arc edge and the straight side of the first semicircular disk, a first sleeve for inserting the first optical cable is installed in the first insertion hole, both ends of the first sleeve have a first locking structure, a first connecting groove connected to the inner wall of the first insertion hole is provided on a disk surface of the first semicircular disk, two concentric first semi-rings are provided on the disk surface where the first connecting groove is located, the first connecting groove is located between the two first semi-rings, a semicircular first screw sleeve is provided at the edge of the disk surface where the first connecting groove is located, the disk surface where the first connecting groove is located is connected to a first flat plate perpendicular to it through a first connecting rod, and the first flat plate is located in the middle of the arc edge and the straight side of the first semicircular disk. On the point line and within the range of the first half ring of the inner circle, two rows of first slots are arranged on both side surfaces of the first flat plate, which are staggered and make the first core fiber in the first optical cable fixed to the first flat plate in a state parallel to the central axis of the first semicircular disk. The outer support ears at the end of the first flat plate are hinged with four semicircular plates parallel to it, and the four semicircular plates are evenly distributed on both sides of the first flat plate. A number of concentric semicircular third slots corresponding to a row of first slots on the corresponding plate surface of the first flat plate and used for installing and fixing the fusion point of the first core fiber of the first core fiber of the first optical cable and the second core fiber of the second optical cable are arranged on the plate surface of the semicircular plate. One end of the third slot corresponds to the corresponding first slot, and the other end of the third slot corresponds to the second fixing component. The end of the first flat plate is hinged with a rod sleeve parallel to it. The length of the rod sleeve is greater than half the arc length of the third outermost groove on the semicircular plate, ensuring that the length of the first optical cable and the second optical cable that have been fused near the fusion point is consistent with the length of the third groove on the semicircular plate, avoiding the first optical cable and the second optical cable from being pulled relative to the first semicircular disk and the second semicircular disk when the fusion point of the first optical cable and the second optical cable is installed in the third groove, ensuring that the fusion point of the optical cable is not damaged.

[0013] In one embodiment, the second fixing assembly includes a second semicircular disk, the straight side end face of the second semicircular disk cooperates with the straight side end face of the first semicircular disk, four second plug holes are opened on the second semicircular disk, and the four second plug holes are evenly distributed on both sides of the line connecting the arc side and the midpoint of the straight side of the second semicircular disk, a second sleeve for inserting a second optical cable is installed in the second plug hole, and the two ends of the second sleeve have a second locking structure, a second connecting groove connected to the inner wall of the second plug hole is opened on one disk surface of the second semicircular disk, two concentric second semi-rings are arranged on the disk surface where the second connecting groove is located, the second semi-ring cooperates with the first semi-ring, the second connecting groove is located between the two second semi-rings, a semicircular third screw sleeve is arranged at the edge of the disk surface where the second connecting groove is located, and the disk surface where the second connecting groove is located is connected to a second flat plate perpendicular to it through a second connecting rod. The second flat plate is located on the line connecting the arc side and the midpoint of the straight side of the second semicircular disk and within the range of the second semi-ring of the inner circle, so as to ensure that the diameter of the second semi-ring is minimized. Two rows of staggered second slots are arranged on both sides of the second plate, and the second core fiber in the second optical cable is fixed to the second plate in a state parallel to the center axis of the second semicircular plate. The second slot corresponds to one end of the third slot on the semicircular plate, and an inner rod parallel to the third slot is hinged at the end of the second plate. The length of the inner rod is greater than half of the arc length of the outermost third slot on the semicircular plate, ensuring that the length near the fusion point of the first optical cable and the second optical cable is consistent with the length of the third slot on the semicircular plate. The inner rod slides in the rod sleeve.

[0014] In one of the embodiments, the rod sleeve is hinged to the first receiving groove at the end of the first plate by a second round pin, the second round pin rotates in the first ring sleeve on the surface of the first plate and is fixedly connected to the rod sleeve, and a first locking bolt that cooperates with the first locking groove on the second round pin after the rod sleeve swings out of the first receiving groove by 90 degrees is installed in the threaded hole on the first ring sleeve, the inner rod is hinged to the second receiving groove at the end of the second plate by a third round pin, the third round pin rotates in the second ring sleeve on the surface of the second plate and is fixedly connected to the inner rod, a third locking bolt that cooperates with the fifth locking groove on the third round pin after the inner rod swings out of the second receiving groove by 90 degrees is installed in the threaded hole on the second ring sleeve, a second locking bolt that cooperates with the third locking groove and the fourth locking groove on the inner rod is installed in the threaded hole on the rod sleeve, the center distance between the third locking groove and the fourth locking groove is greater than half the arc length of the outermost third card groove on the semicircular plate, the semicircular plate is hinged to the support ear on the outer side of the end of the first plate by the first round pin, and the first round pin is fixedly connected to the support ear on the first plate.

[0015] In one of the embodiments, two limit rods are installed on both sides of the end of the second plate to cooperate with the straight edges of the semicircular plate, and the limit rods are installed with elastic locking plates that cooperate with the second locking grooves on the arc edges of the semicircular plate when the straight edges of the semicircular plate are opposite and parallel to the ends of the first plate and the second plate.

[0016] In one embodiment, a slot is provided on the straight-side end surface of the first semi-circular disk, and a first sealing gasket is provided on the straight-side end surface of the first semi-circular disk, the end surfaces at both ends of the first semi-ring, the end surfaces at both ends of the first screw sleeve and the wall surface of the slot; an insert matching the slot is provided on the straight-side end surface of the second semi-circular disk, and a second sealing gasket matching the first sealing gasket is provided on the straight-side end surface of the second semi-circular disk, the end surfaces at both ends of the second semi-ring, the end surfaces at both ends of the third screw sleeve and the insert; the first sealing gasket and the second sealing gasket respectively protrude from the first semi-circular disk surface where the first semi-ring is located and the second semi-circular disk surface where the second semi-ring is located.

[0017] In one embodiment, the first locking structure includes a second screw sleeve, which is threadedly connected to the corresponding end of the first sleeve, one end of the second screw sleeve cooperates with the first sealing ring on the first circular ring outside the first sleeve, and the other end of the second screw sleeve is provided with a first cone portion, the first cone portion cooperates with a plurality of circumferentially evenly distributed first locking strips provided at the end of the first sleeve, the first locking strip cooperates with the first optical cable, and a second sealing ring cooperating with the first optical cable is provided in the first cone portion.

[0018] In one embodiment, the second locking structure includes a fourth screw sleeve, the fourth screw sleeve is threadedly connected to the corresponding end of the second sleeve, one end of the fourth screw sleeve cooperates with the third sealing ring on the second ring outside the second sleeve, the other end of the fourth screw sleeve is provided with a second cone, the second cone cooperates with a plurality of circumferentially uniformly distributed second locking strips provided at the end of the second sleeve, the second locking strip cooperates with the second optical cable, and the second cone is provided with a fourth sealing ring cooperating with the second optical cable.

[0019] In one embodiment, the airtight component includes a shell cover and a fifth screw sleeve, the fifth screw sleeve is threadedly matched with the first screw sleeve and the third screw sleeve, a ring plate matched with the end of the fifth screw sleeve is arranged on the outer side of the cover mouth end of the shell cover, a third ring sleeve is arranged on the inner side of the cover mouth of the shell cover, an annular space with one end open is formed between the third ring sleeve and the shell cover, a third circular ring is arranged on the inner side of the cover mouth end of the shell cover, a seventh sealing ring matched with the disk surface of the first semi-circular disk and the second semi-circular disk and the outer side of the first semi-ring and the second semi-ring of the outer ring is arranged on the end face of the third circular ring, and a fourth circular ring is arranged on the outer side of the shell cover mouth end of the third ring sleeve, An eighth sealing ring is arranged on the end face of the fourth circular ring, which cooperates with the disk surface of the first semi-circular disk and the second semi-circular disk and the inner side of the first inner ring and the second inner ring; an elastic bag sealingly bonded with the third ring sleeve is arranged on the inner side of the shell cover; an air supply port and an exhaust port are arranged on the wall surface of the shell cover; the air supply port is connected with the annular space formed by the third ring sleeve, and the exhaust port is connected with the space formed by the elastic bag and the shell cover; a first sealing cover is arranged at the air supply port, and a fifth sealing ring is matched between the first sealing cover and the air supply port; a second sealing cover is arranged at the exhaust port, and a sixth sealing ring is matched between the second sealing cover and the exhaust port.

[0020] In one embodiment, four first magnets evenly distributed circumferentially are arranged on the outer side of the middle part of the elastic sac, and the first magnets cooperate with second magnets arranged on the inner wall of the shell cover. A plurality of elastic ropes are evenly arranged on the outer side of the top of the elastic sac, and the elastic ropes are connected to the inner wall of the shell cover through patches.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention can perform regular air tightness detection by blowing air from the air supply port into the annular space between the third ring sleeve and the shell cover.

[0023] 2. Leakage of the air supply port and the air exhaust port in the present invention will not affect the air tightness of the space where the fusion points of the first optical cable and the four second optical cables are located.

[0024] 3. The present invention can realize parallel butt welding of the first core fiber in the first optical cable and the second core fiber in the second optical cable through the first fixing component and the second fixing component, ensuring that the lengths of the first core fiber and the second core fiber in the shell are relatively short and the first core fiber and the second core fiber that have been welded can be fixed on the first flat plate, the semicircular plate and the second flat plate without the need for large-scale multiple-turn winding, thereby avoiding the breakage of the first core fiber and the second core fiber and improving the efficiency of the welding installation and fixing operation of the first core fiber in the first optical cable and the second core fiber in the second optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of two viewing angles of the present invention.

[0026] Figure 2 It is an overall cross-sectional view of the present invention from two viewing angles.

[0027] Figure 3 It is a top cross-sectional view of the present invention.

[0028] Figure 4 It is a cross-sectional view of the middle part of the present invention.

[0029] Figure 5 It is a cross-sectional view of the lower part of the present invention.

[0030] Figure 6 It is a cross-sectional view of the annular space formed by the shell cover and the third ring sleeve in the present invention, which is sealed and matched with the first semi-circular disk or the second semi-circular disk.

[0031] Figure 7 It is a cross-sectional view of the sealing cooperation between the first half disc and the second half disc in the present invention.

[0032] Figure 8 It is a cross-sectional view of the cooperation between the seventh sealing ring and the eighth sealing ring and the first sealing gasket and the second sealing gasket in the present invention.

[0033] Fig. 9 It is the upper structure of the first fixing component in the present invention and its cross-sectional view.

[0034] Fig.10 It is the upper structure of the second fixing component in the present invention and its cross-sectional view.

[0035] Fig.11 It is a cross-sectional view of the structure on the first sleeve or the second sleeve in the present invention.

[0036] Fig.12 It is a schematic diagram of the state change of the first fixing component and the second fixing component in the present invention.

[0037] Fig.13 It is a cross-sectional view of the rod sleeve and the inner rod in the present invention when they are in a fused state.

[0038] Fig.14 It is a locking cross-sectional view of the rod sleeve and the inner rod in the present invention when they are in a fused state.

[0039] Fig.15 It is a cross-sectional view of the installation of the first optical cable and the second optical cable on the semicircular plate after being fused in the present invention.

[0040] Fig.16 It is a cross-sectional view of the relative positions of the first locking groove and the first locking bolt and the fifth locking groove and the third locking bolt in the present invention.

[0041] Fig.17 It is a schematic diagram of the structure of the first flat plate and the semicircular plate in the present invention.

[0042] Fig.18 It is a structural diagram of a semicircular plate in the present invention.

[0043] Fig.19 It is the cooperation of the rod sleeve and the inner rod in the present invention and their cross-sectional view.

[0044] Fig. 20 It is a schematic diagram of the improved structure of the third card slot.

[0045] Name of the label in the figure:

[0046] 100, first fixing assembly; 101, first semicircular disk; 102, first plug hole; 103, first connecting groove; 104, slot; 105, first screw sleeve; 106, first semicircular ring; 107, first sealing pad; 108, first sleeve; 109, first circular ring; 110, first sealing ring; 111, first locking strip; 112, second screw sleeve; 113, first cone; 114, first connecting rod; 115, first flat Plate; 116, first slot; 117, first round pin; 118, first receiving slot; 119, first ring sleeve; 120, first locking bolt; 121, rod sleeve; 122, second locking bolt; 123, second round pin; 124, first locking slot; 125, semicircular plate; 126, second locking slot; 127, first locking structure; 128, third slot; 129, second sealing ring; 130, straight slot; 131, support rod;

[0047] 200, second fixing assembly; 201, second semicircular disk; 202, second plug hole; 203, second connecting groove; 204, plug strip; 205, third screw sleeve; 206, second semicircular ring; 207, second sealing pad; 208, second sleeve; 209, second circular ring; 210, third sealing ring; 211, second locking strip; 212, fourth screw sleeve; 213, second cone; 214, second connecting rod; 215, second flat plate; 216, second clamping groove; 217, second receiving groove; 218, second ring sleeve; 219, third locking bolt; 220, inner rod; 221, third locking groove; 222, fourth locking groove; 223, third round pin; 224, fifth locking groove; 225, limiting rod; 226, locking plate; 227, second locking structure; 228, fourth sealing ring;

[0048] 300, airtight assembly; 301, shell cover; 302, air supply port; 303, exhaust port; 304, first cover; 305, second cover; 306, fifth sealing ring; 307, ring plate; 308, fifth screw sleeve; 309, third ring sleeve; 310, third circular ring; 311, fourth circular ring; 312, seventh sealing ring; 313, eighth sealing ring; 314, elastic capsule; 315, first magnet; 316, second magnet; 317, elastic rope; 318, patch; 319, sixth sealing ring;

[0049] 401, first optical cable; 402, first core fiber; 403, first fiber core; 404, second optical cable; 405, second core fiber; 406, second fiber core; 407, sheath. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] like Figure 1-19 As shown, a single-end splice box is used for optical cable fusion splicing and protecting the fusion point of the optical cable, comprising:

[0054] The first fixing assembly 100 and the second fixing assembly 200 are used for parallel fixed-distance butt welding of optical cables and fixing the fiber core at the welding point with a half-circle arc bend relative to the optical cable.

[0055] The airtight component 300 is used to provide dust and water proof protection to the optical cable fusion point and to perform regular airtightness detection on the space where the fusion point is located.

[0056] The present invention can realize parallel butt welding of the first core fiber 402 in the first optical cable 401 and the second core fiber 405 in the second optical cable 404 through the first fixing component 100 and the second fixing component 200, ensuring that the lengths of the first core fiber 402 and the second core fiber 405 in the shell cover 301 are relatively short and the first core fiber 402 and the second core fiber 405 that have been welded can be fixed on the first plate 115, the semicircular plate 125 and the second plate 215 without large-scale multiple-turn winding, thereby avoiding the first core fiber 402 and the second core fiber 405 from breaking and improving the efficiency of the welding installation and fixing operation of the first core fiber 402 in the first optical cable 401 and the second core fiber 405 in the second optical cable 404.

[0057] In a further embodiment, Fig. 9 , 11, 12, 13, 14, 16, the first fixing assembly 100 includes a first semicircular disk 101, the first semicircular disk 101 is provided with a first plug hole 102, the first plug hole 102 is located on the line connecting the midpoints of the arc edge and the straight edge of the first semicircular disk 101, a first sleeve 108 for inserting the first optical cable 401 is installed in the first plug hole 102, both ends of the first sleeve 108 have a first locking structure 127, and one disk surface of the first semicircular disk 101 is provided with a first plug hole 102. 02, the first communicating groove 103 is connected to the inner wall, two concentric first half rings 106 are arranged on the disk surface where the first communicating groove 103 is located, the first communicating groove 103 is located between the two first half rings 106, a semicircular first screw sleeve 105 is arranged at the edge of the disk surface where the first communicating groove 103 is located, the disk surface where the first communicating groove 103 is located is connected to a first flat plate 115 perpendicular to it through a first connecting rod 114, and the first flat plate 115 is located in the middle of the arc edge and the straight edge of the first semicircular disk 101. The first flat plate 115 is located on the point connecting line and within the range of the first semi-ring 106 of the inner circle. Two rows of staggered distribution are arranged on the two side surfaces of the first flat plate 115, and the first core fiber 402 in the first optical cable 401 is fixed to the first flat plate 115 in a state parallel to the central axis of the first semi-circular disk 101. The outer side ears at the end of the first flat plate 115 are hinged with four semi-circular plates 125 parallel to it. The four semi-circular plates 125 are evenly distributed on both sides of the first flat plate 115. The plate surface of the semi-circular plate 125 is provided with A plurality of concentric semicircular third slots 128 corresponding to a row of first slots 116 on the corresponding plate surface of the first plate 115 and used for installing and fixing the fusion points of the first fiber core 403 in the first core fiber 402 of the first optical cable 401 and the second fiber core 406 in the second core fiber 405 of the second optical cable 404, one end of the third slot 128 corresponds to the corresponding first slot 116, and the other end of the third slot 128 corresponds to the second fixing assembly 200, and the end of the first plate 115 is hinged with a rod sleeve 121 parallel to it. The length of the rod sleeve 121 is greater than half of the arc length of the outermost third slot 128 on the semicircular plate 125, ensuring that the length of the first optical cable 401 and the second optical cable 404 near the fusion point is consistent with the length of the third slot 128 on the semicircular plate 125, avoiding the first optical cable 401 and the second optical cable 404 from being pulled relative to the first semicircular disk 101 and the second semicircular disk 201 when the fusion point of the first optical cable 401 and the second optical cable 404 is installed in the third slot 128, ensuring that the fusion point of the optical cable is not damaged. The third slot can also have a section of straight slot 130.

[0058] In a further embodiment, Fig.10 , 11, 12, 13, 14, and 16, the second fixing assembly 200 includes a second semicircular disk 201, the straight edge end surface of the second semicircular disk 201 cooperates with the straight edge end surface of the first semicircular disk 101, and the second semicircular disk 201 is provided with four second plug holes 202, and the four second plug holes 202 are evenly distributed on both sides of the line connecting the arc edge and the midpoint of the straight edge of the second semicircular disk 201, and a second sleeve 208 for inserting the second optical cable 404 is installed in the second socket 202, and the two ends of the second sleeve 208 have a second locking structure 227, so A second connecting groove 203 communicating with the inner wall of the second insertion hole 202 is provided on one disk surface of the second semicircular disk 201, two concentric second semi-rings 206 are provided on the disk surface where the second connecting groove 203 is located, the second semi-ring 206 cooperates with the first semi-ring 106, the second connecting groove 203 is located between the two second semi-rings 206, a semicircular third screw sleeve 205 is provided at the edge of the disk surface where the second connecting groove 203 is located, and a second flat plate 215 perpendicular to the disk surface where the second connecting groove 203 is located is connected to the second flat plate 215 through a second connecting rod 214. The second flat plate 215 is located on the line connecting the midpoints of the arc edge and the straight edge of the second semicircular disk 201 and within the range of the inner second semi-ring 206, so as to ensure that the diameter of the second semi-ring 206 is minimized. Two rows of second slots 216 are arranged on both sides of the second flat plate 215, which are staggered and fixed to the second flat plate 215 so that the second core fiber 405 in the second optical cable 404 is parallel to the center axis of the second semicircular plate 201. The second slot 216 corresponds to one end of the third slot 128 on the semicircular plate 125, and the end of the second flat plate 215 is hinged with an inner rod 220 parallel to the third slot 128. The length of the inner rod 220 is greater than half of the arc length of the outermost third slot 128 on the semicircular plate 125, ensuring that the length near the fusion point of the first optical cable 401 and the second optical cable 404 is consistent with the length of the third slot 128 on the semicircular plate 125. The inner rod 220 slides in the rod sleeve 121.

[0059] In a further embodiment, Fig.13 , 14As shown in , 16 and 19, the rod sleeve 121 is hinged to the first receiving groove 118 at the end of the first plate 115 through the second round pin 123, the second round pin 123 rotates in the first ring sleeve 119 on the surface of the first plate 115 and is fixedly connected to the rod sleeve 121, and the first locking bolt 120 is installed in the threaded hole on the first ring sleeve 119, which cooperates with the first locking groove 124 on the second round pin 123 after the rod sleeve 121 swings out of the first receiving groove 118 90 degrees. The inner rod 220 is hinged to the second receiving groove 217 at the end of the second plate 215 through the third round pin 223, and the third round pin 223 rotates in the second ring sleeve 218 on the surface of the second plate 215 and is fixedly connected to the inner rod 22 0 is fixedly connected, a third locking bolt 219 is installed in the threaded hole on the second ring sleeve 218, which cooperates with the fifth locking groove 224 on the third round pin 223 after the inner rod 220 swings out of the second accommodating groove 217 90 degrees, and a second locking bolt 122 is installed in the threaded hole on the rod sleeve 121, which cooperates with the third locking groove 221 and the fourth locking groove 222 on the inner rod 220, and the center distance between the third locking groove 221 and the fourth locking groove 222 is greater than half of the arc length of the outermost third clamping groove 128 on the semicircular plate 125. The semicircular plate 125 is hinged to the support ear on the outer side of the end of the first flat plate 115 through the first round pin 117, and the first round pin 117 is fixedly connected to the support ear on the first flat plate 115.

[0060] In a further embodiment, Fig.16 , 17 As shown in 18, two limiting rods 225 that cooperate with the straight edges of the semicircular plate 125 are installed on both sides of the end of the second plate 215, and elastic locking plates 226 that cooperate with the second locking grooves 126 on the arc edges of the semicircular plate 125 are installed on the limiting rods 225 when the straight edges of the semicircular plate 125 are opposite and parallel to the ends of the first plate 115 and the second plate 215.

[0061] In a further embodiment, Figure 7 , 8 As shown in , 9 and 10, a slot 104 is provided on the straight-edge end surface of the first semi-circular disk 101, and a first sealing gasket 107 is provided on the straight-edge end surface of the first semi-circular disk 101, the end surfaces at both ends of the first semi-ring 106, the end surfaces at both ends of the first screw sleeve 105 and the wall surface of the slot 104; an insert 204 cooperating with the slot 104 is provided on the straight-edge end surface of the second semi-circular disk 201, and a second sealing gasket 207 cooperating with the first sealing gasket 107 is provided on the straight-edge end surface of the second semi-circular disk 201, the end surfaces at both ends of the second semi-ring 206, the end surfaces at both ends of the third screw sleeve 205 and the insert 204; the first sealing gasket 107 and the second sealing gasket 207 respectively protrude from the disk surface of the first semi-circular disk 101 where the first semi-ring 106 is located and the disk surface of the second semi-circular disk 201 where the second semi-ring 206 is located.

[0062] In a further embodiment, Fig.11 As shown, the first locking structure 127 includes a second screw sleeve 112, which is threadedly connected to the corresponding end of the first sleeve 108, one end of the second screw sleeve 112 cooperates with the first sealing ring 110 on the first ring 109 outside the first sleeve 108, and the other end of the second screw sleeve 112 is provided with a first cone 113, the first cone 113 cooperates with a plurality of circumferentially uniformly distributed first locking strips 111 provided at the end of the first sleeve 108, the first locking strip 111 cooperates with the first optical cable 401, and the first cone 113 is provided with a second sealing ring 129 that cooperates with the first optical cable 401.

[0063] In a further embodiment, Fig.11 As shown, the second locking structure 227 includes a fourth screw sleeve 212, the fourth screw sleeve 212 is threadedly connected to the corresponding end of the second sleeve 208, one end of the fourth screw sleeve 212 cooperates with the third sealing ring 210 on the second ring 209 outside the second sleeve 208, the other end of the fourth screw sleeve 212 is provided with a second cone 213, the second cone 213 cooperates with a plurality of circumferentially uniformly distributed second locking strips 211 provided at the end of the second sleeve 208, the second locking strip 211 cooperates with the second optical cable 404, and the second cone 213 is provided with a fourth sealing ring 228 that cooperates with the second optical cable 404.

[0064] In a further embodiment, Figure 1 , 2As shown in Figures 3, 5 and 6, the airtight component 300 includes a shell cover 301 and a fifth screw sleeve 308, the fifth screw sleeve 308 is threadedly matched with the first screw sleeve 105 and the third screw sleeve 205, a ring plate 307 matched with the end of the fifth screw sleeve 308 is arranged on the outer side of the cover mouth end of the shell cover 301, a third ring sleeve 309 is arranged on the inner side of the cover mouth of the shell cover 301, an annular space with one end open is formed between the third ring sleeve 309 and the shell cover 301, a third circular ring 310 is arranged on the inner side of the cover mouth end of the shell cover 301, a seventh sealing ring 312 matched with the disk surface of the first semi-circular disk 101 and the second semi-circular disk 201 and the outer side of the first outer ring 106 and the second outer ring 206 is arranged on the end face of the third circular ring 310, a fourth circular ring 311 is arranged on the outer side of the cover mouth end of the shell cover 301 of the third ring sleeve 309, and the fourth circular ring 312 is matched with the disk surface of the first semi-circular disk 101 and the second semi-circular disk 201 and the outer side of the first outer ring 106 and the second outer ring 206. An eighth sealing ring 313 is arranged on the end face of the ring 311, which cooperates with the disk surface of the first semi-circular disk 101 and the second semi-circular disk 201 and the inner side of the inner first semi-ring 106 and the inner second semi-ring 206; an elastic bag 314 sealingly bonded to the third ring sleeve 309 is arranged on the inner side of the shell cover 301; an air supply port 302 and an exhaust port 303 are arranged on the wall surface of the shell cover 301; the air supply port 302 is communicated with the annular space formed by the third ring sleeve 309; the exhaust port 303 is communicated with the space formed by the elastic bag 314 and the shell cover 301; a first sealing cover 304 is arranged at the air supply port 302; a fifth sealing ring 306 is cooperated between the first sealing cover 304 and the air supply port 302; a second sealing cover 305 is arranged at the exhaust port 303; a sixth sealing ring 319 is cooperated between the second sealing cover 305 and the exhaust port 303.

[0065] The present invention can perform regular air tightness testing by blowing air from the air supply port 302 into the annular space between the third ring sleeve 309 and the shell cover 301. Leakage of the air supply port 302 and the exhaust port 303 in the present invention will not affect the air tightness of the space where the fusion points of the first optical cable 401 and the four second optical cables 404 are located.

[0066] In a further embodiment, Figure 3 , 4 As shown, four circumferentially evenly distributed first magnets 315 are arranged on the outer middle part of the elastic capsule 314, and the first magnets 315 cooperate with the second magnets 316 arranged on the inner wall of the shell cover 301. A plurality of elastic ropes 317 are evenly arranged on the outer top part of the elastic capsule 314, and the elastic ropes 317 are connected to the inner wall of the shell cover 301 through patches 318.

[0067] The operation process of the present invention is as follows:

[0068] In the initial state, the air supply port 302 and the exhaust port 303 on the shell cover 301 are in a sealed closed state, the first semi-disc 101 and the second semi-disc 201 are in a merged and docked state, the first screw sleeve 105 and the third screw sleeve 205 are threadedly connected with the fifth screw sleeve 308, and the seventh sealing ring 312 and the eighth sealing ring 313 are in close contact with the disk surface of the first semi-disc 101 and the second semi-disc 125 under the interaction of the fifth screw sleeve 308 and the ring plate 307. Since the first sealing gasket 107 and the second sealing gasket 207 are softer than the seventh sealing ring 312 and the eighth sealing ring 313, the raised parts of the first sealing gasket 107 and the second sealing gasket 207 relative to the first semi-disc 101 and the second semi-disc 201 form a sealed fit with the seventh sealing ring 312 and the eighth sealing ring 313 under the extrusion of the seventh sealing ring 312 and the eighth sealing ring 313. The first plate 115 and the second plate 215 are in a merged state, the rod sleeve 121 and the inner rod 220 are in an extreme contraction state, the second locking bolt 122 is inserted into the third locking groove 221 on the inner rod 220 and locks the rod sleeve 121 and the inner rod 220, the first locking groove 124 on the second round pin 123 is 90 degrees away from the first locking bolt 120 in the circumferential direction, the fifth locking groove 224 on the third round pin 223 is 90 degrees away from the third locking bolt 219 in the circumferential direction, the straight edge end surfaces of the four semicircular plates 125 are parallel to and opposite to the ends of the first plate 115 and the second plate 215, and the locking sheet 226 is inserted into the slot 104 on the semicircular plate 125 and locks the semicircular plate 125.

[0069] Welding fixation and dust and water protection of welding points:

[0070] like Fig.12As shown, when the present invention is needed to be used to weld the 24-core first optical cable 401 with four 6-core second optical cables 404, firstly, the fifth screw sleeve 308 is unscrewed from the first screw sleeve 105 and the third screw sleeve 205 and the locking of the shell 301 is released, the shell 301 and the elastic capsule 314 are removed, and the locking piece 226 is disengaged from the second locking groove 126 on the four semicircular plates 125 by shifting, and the four semicircular plates 125 are swung to one side of the first flat plate 115, and then, the second locking bolt 122 is loosened and disengaged from the third locking groove 221, and the second flat plate 215 is swung around the second round pin 123 and the third round pin 223, so that the second flat plate 215 is finally 5 is parallel to the end face of the first plate 115, stretching the inner rod 220 so that the inner rod 220 moves out of the rod sleeve 121, and when the fourth locking groove 222 on the inner rod 220 is opposite to the second locking bolt 122, stop pulling the inner rod 220 to extend, rotate the second locking bolt 122 and insert it into the fourth locking groove 222 to complete the locking of the inner rod 220 and the rod sleeve 121, rotate the first locking bolt 120 and insert it into the first locking groove 124 on the second round pin 123, rotate the third locking bolt and insert it into the fifth locking groove 224 on the third round pin 223, so that the relative position of the first plate 115 and the second plate 215 is in a locked state.

[0071] Then, the 24-core first optical cable 401 is inserted into the first sleeve 108, and the four 6-core second optical cables 404 are respectively inserted into the four second sleeves 208, and the end of the first optical cable 401 and the end of the second optical cable 404 located between the first semi-circular disk 101 and the second semi-circular disk 201 are peeled to remove the first core fiber 402 and the second core fiber 405, ensuring that the peeled lengths of the first optical cable 401 and the second optical cable 404 are equal, and the peeled lengths of the first optical cable 401 and the second optical cable 404 are both greater than the sum of the lengths of the first plate 115 and the rod sleeve 121 or the sum of the lengths of the second plate 215 and the inner rod 220, so that the first core fiber 402 and the corresponding second core fiber 405 partially overlap at the center position between the first plate 115 and the second plate 215, which is convenient for shearing, trimming and welding of the first core fiber 402 and the second core fiber 405.

[0072] The second screw sleeve 112 at both ends of the first sleeve 108 and the fourth screw sleeve 212 at both ends of the second sleeve 208 are rotated so that the first cone 113 of the second screw sleeve 112 drives a corresponding group of first locking strips 111 to clamp the first optical cable 401 and lock the first optical cable 401. At the same time, the second screw sleeve 112 squeezes the first sealing ring 110 onto the first ring 109 to form a seal, and the first cone 113 squeezes the second sealing ring 129 onto the first optical cable 401 to form a seal. The second cone 213 of the fourth screw sleeve 212 drives a corresponding group of second locking strips 211 to clamp the second optical cable 404 and lock the second optical cable 404. The fourth screw sleeve 212 squeezes the third sealing ring 210 onto the second ring 209 to form a seal, and the second cone 213 squeezes the fourth sealing ring 228 onto the second optical cable 404 to form a seal.

[0073] The 24 first core fibers 402 exposed by peeling in the first optical cable 401 are evenly divided into two groups, each group has 12 fibers, and the two groups of first core fibers 402 are respectively pressed into the first slots 116 on both sides of the first plate 115, and the second core fibers 405 exposed by peeling in the four second optical cables 404 on both sides of the second plate 215 are respectively pressed into the second slots 216 on the corresponding sides of the second plate 215, so that the six second core fibers 405 of each second optical cable 404 correspond to the corresponding six first core fibers 402 on the corresponding side of the first plate 115, and the sheath 407 is installed on each first core fiber 402. Then, the first core fibers 405 are respectively pressed into the second slots 216 on the corresponding sides of the second plate 215. The ends of the first core fiber 402 and the second core fiber 405 are sheared and trimmed, and the first core fiber 402 and the corresponding second core fiber 405 are fused in sequence. Since there is a sufficient distance between the first plate 115 and the second plate 215, the optical fiber fusion splicing equipment can fuse the first core fiber 402 and the second core fiber 405. During the fusion splicing process of the first core fiber 402 and the second core fiber 405, the first core fiber 402 and the second core fiber 405 are in a parallel butt-fused state, and the first core fiber 402 and the second core fiber 405 do not need to be bent, so as to avoid the first core fiber 402 and the second core fiber 405 from breaking during the fusion splicing process.

[0074] After all the first core fibers 402 are fused with the corresponding second core fibers 405, the sheath 407 on each first core fiber 402 is moved to the corresponding fusion point for protection and wrapping. Then, the first locking bolt 120 is released from locking the second round pin 123, the third locking bolt 219 is released from locking the third round pin 223, and the second locking bolt 122 is released from locking the inner rod 220 and the rod sleeve 121. Then, the second plate 215 is moved relative to the first plate 1 15 is swung back to reset, so that the first semi-circular disk 101 and the second semi-circular disk 201 are merged and docked. After the inner rod 220 and the rod sleeve 121 are retracted into the first accommodating groove 118 and the second accommodating groove 217, the inner rod 220 and the rod sleeve 121 are locked by rotating the second locking bolt 122, and the fusion points of the 24 first core fibers 402 of the first optical cable 401 and the 24 second core fibers 405 of the four second optical cables 404 partially form a semicircular arc with a small curvature.

[0075] like Fig. 20 In order to further improve the strength of the welding point and prevent damage to the wall welding point, a straight support rod is added to the sleeve after welding to support the welding point and ensure that the welding point will not be subjected to bending force. Correspondingly, a straight slot is designed in the third slot to facilitate the placement of the straight support rod.

[0076] The four semicircular plates 125 are swung back and reset in sequence and locked by the corresponding locking pieces 226. After each semicircular plate 125 is reset, the six fusion points of the corresponding second optical cable 404 are first pressed into the six third card slots 128 on the semicircular plate 125 that has been reset, and then the next semicircular plate 125 is swung back and reset. The whole process does not require winding the first core fiber 402 and the second core fiber 405 that have been fused, so as to avoid the first core fiber 402 and the second core fiber 405 from breaking. The present invention is mainly aimed at scenarios where re-fusion is not required after fusion. When it is needed to be used in scenarios where re-fusion is required, the length for secondary or multiple re-fusion can be reserved during the first fusion. The extra length can be arranged and fixed by the first card slot.

[0077] After all the semicircular plates 125 are swung back to reset and all the welding points are fixed, the first sealing gasket 107 on the straight side end face of the first semicircular disk 101 and the second sealing gasket 207 on the straight side end face of the second semicircular disk 201 squeeze each other to form a seal. After the shell cover 301 is installed, the fifth screw sleeve 308 is installed on the first screw sleeve 105 and the third screw sleeve 205 through the shell cover 301. The fifth screw sleeve 308 presses the shell cover 301 tightly against the first semicircular disk 101 and the second semicircular disk 201 through the ring plate 307. Since the first sealing gasket 107 and the second sealing gasket 207 are softer than the seventh sealing ring 312 and the eighth sealing ring 313, the disk surface of the first semicircular disk 101, the disk surface of the second semicircular disk 201, and the convex parts of the first sealing gasket 107 and the second sealing gasket 207 form an extrusion seal.

[0078] The present invention installed at the optical cable fusion point and used for a period of time is regularly tested for air tightness:

[0079] The first cover 304 and the second cover 305 are removed to open the air supply port 302 and the air exhaust port 303 , and air is blown into the annular space between the shell cover 301 and the third ring sleeve 309 through the air supply port 302 .

[0080] If exhaust is discharged from the exhaust port 303, there are three possible situations where leakage may occur:

[0081] 1. The first locking structure 127 in the shell cover 301 of the second sleeve 208 and the second locking structure 227 in the shell cover 301 of the first sleeve 108 leak, and the air is blown through the air delivery port 302, the annular space between the third ring sleeve 309 and the shell cover 301, the first connecting groove 103 and the second connecting groove 203, the first sleeve 108 and the second sleeve 208, the first locking structure 107 leaking in the shell cover 301 of the first sleeve 108, and the second locking structure 227 leaking in the shell cover 301 of the second sleeve 208. The elastic bag 314 is pushed into the elastic bag 314, causing the elastic bag 314 to swell close to the inner wall of the shell cover 301. The air in the shell cover 301 is squeezed by the elastic bag 314 and discharged from the exhaust port 303. Since the amount of air sealed between the elastic bag 314 and the shell cover 301 is limited, the exhaust volume of the exhaust port 303 is small at this time. It is necessary to replace the first sealing ring 110 and the second sealing ring 129 of the first locking structure 127 in the shell cover 301 and the third sealing ring 210 and the fourth sealing ring 228 of the second locking structure 227 in the shell cover 301.

[0082] 2. The first locking structure 127 in the shell cover 301 of the second sleeve 208 and the second locking structure 227 in the shell cover 301 of the first sleeve 108 leak. At the same time, the adhesive portion between the elastic bag 314 and the third ring sleeve 309 leaks. The air passes through the air delivery port 302, the annular space between the third ring sleeve 309 and the shell cover 301, the first connecting groove 103 and the second connecting groove 203, the first sleeve 108 and the second sleeve 208, the first locking structure 107 that leaks in the shell cover 301 of the first sleeve 108, and the shell cover 309 of the second sleeve 208. The second locking structure 227 leaking in the shell cover 301 and the adhesive part leaking between the elastic bag 314 and the third ring sleeve 309 are blown to the exhaust port 303. Since the air supply port 302 is directly connected with the exhaust port 303, a large amount of air is exhausted from the exhaust port 303 at this time. It is necessary to replace the first sealing ring 110 and the second sealing ring 129 of the first locking structure 127 in the shell cover 301 and the third sealing ring 210 and the fourth sealing ring 228 of the second locking structure 227 in the shell cover 301, and at the same time, check and repair the adhesive part between the elastic bag 314 and the third ring sleeve 309.

[0083] 3. Leakage occurs between the eighth sealing ring 313 and the third ring sleeve 309, the first semi-disc 101 and the second semi-disc 201. The air blown in from the air supply port 302 enters the elastic bag 314 through the annular space between the third ring sleeve 309 and the shell cover 301, and the gap between the third ring sleeve 309 and the first semi-disc 101 and the second semi-disc 201, so that the elastic bag 314 swells close to the inner wall of the shell cover 301. The air in the shell cover 301 is squeezed by the elastic bag 314 and discharged from the exhaust port 303. Since the amount of air sealed between the elastic bag 314 and the shell cover 301 is limited, the exhaust volume of the exhaust port 303 is small at this time, and the eighth sealing ring 313 needs to be replaced.

[0084] If the second sleeve 208 or the first sleeve 108 is exhausting, then the first locking structure 127 outside the shell cover 301 of the first sleeve 108 or the second locking structure 227 outside the shell cover 301 of the second sleeve 208 is leaking, and the air blown in from the air supply port 302 is discharged outward through the annular space between the third ring sleeve 309 and the shell cover 301, the first connecting groove 103 on the first semi-circular disk 101 and the second connecting groove 203 on the second semi-circular disk 201, the first locking structure 127 leaking at the exposed end of the first sleeve 108 and the second locking structure 227 leaking at the exposed end of the second sleeve 208. At this time, it is necessary to replace the first sealing ring 110, the second sealing ring 129 of the first locking structure 127 outside the shell cover 301 and the third sealing ring 210, the fourth sealing ring 228 of the second locking structure 227 outside the shell cover 301.

[0085] If the exhaust port 303, the first sleeve 108 and the second sleeve 208 are not exhausted, and the shell cover 301 cannot maintain pressure, the air blown in from the air supply port 302 leaks out through other places, that is, leakage occurs between the seventh sealing ring 312 and the third ring sleeve 309, the first semi-disc 101 and the second semi-disc 201. At the same time, leakage occurs between the straight edge end surface of the first semi-disc 101 and the straight edge end surface of the second semi-disc 201. The air sent in from the air supply port 302 is discharged through the gap between the shell cover 301 and the first semi-disc 101 and the second semi-disc 201 and the docking gap between the first semi-disc 101 and the second semi-disc 201. It is necessary to replace the seventh sealing ring 312, the first sealing pad 107 and the second sealing pad 207.

[0086] Because the space where the welding points of the first optical cable 401 and the four second optical cables 404 are located is wrapped by the elastic bag, leakage of the air supply port 302 and the exhaust port 303 itself will not affect the air tightness of the space where the welding points of the first optical cable 401 and the four second optical cables 404 are located, and the dust and water proof functions can be effectively exerted.

Claims

1. A single-end splice box, used for optical cable fusion splicing and protecting the fusion point of the optical cable, characterized in that: include: The first fixing assembly and the second fixing assembly are used for parallel fixed-distance butt welding of optical cables and fixing the fiber core at the welding point with a half-circle arc bend relative to the optical cable; Airtight components are used to protect the optical cable splicing points from dust and water and to perform regular airtightness tests on the space where the splicing points are located; The first fixing component comprises a first semicircular disk, a first insertion hole is provided on the first semicircular disk, the first insertion hole is located on the line connecting the midpoints of the arc edge and the straight edge of the first semicircular disk, a first sleeve for inserting the first optical cable is installed in the first insertion hole, both ends of the first sleeve have a first locking structure, a first connecting groove connected to the inner wall of the first insertion hole is provided on a disk surface of the first semicircular disk, two concentric first semi-rings are provided on the disk surface where the first connecting groove is located, the first connecting groove is located between the two first semi-rings, a semicircular first screw sleeve is provided at the edge of the disk surface where the first connecting groove is located, the disk surface where the first connecting groove is located is connected to a first flat plate perpendicular to it through a first connecting rod, the first flat plate is located on the line connecting the midpoints of the arc edge and the straight edge of the first semicircular disk and within the range of the inner circle first semi-ring, Two rows of staggered first slots are arranged on both sides of the first plate, and the first core fiber in the first optical cable is fixed to the first plate in a state parallel to the central axis of the first semicircular disk. Four semicircular plates parallel to the first plate are hinged to the outer side ears at the end of the first plate. The four semicircular plates are evenly distributed on both sides of the first plate. A number of concentric semicircular third slots corresponding to a row of first slots on the corresponding plate surface of the first plate and used for installing and fixing the fusion points of the first core fiber in the first core fiber of the first optical cable and the second core fiber in the second core fiber of the second optical cable are arranged on the plate surface of the semicircular plate. One end of the third slot corresponds to the corresponding first slot, and the other end of the third slot corresponds to the second fixing component. A rod sleeve parallel to the first plate is hinged at the end of the first plate, and the length of the rod sleeve is greater than half of the arc length of the outermost third slot on the semicircular plate. The second fixing component includes a second semicircular disk, the straight side end surface of the second semicircular disk cooperates with the straight side end surface of the first semicircular disk, four second plug holes are opened on the second semicircular disk, and the four second plug holes are evenly distributed on both sides of the line connecting the arc side and the midpoint of the straight side of the second semicircular disk, a second sleeve for inserting the second optical cable is installed in the second socket, and the two ends of the second sleeve have a second locking structure, a second connecting groove connected to the inner wall of the second socket is opened on one disk surface of the second semicircular disk, and two concentric second semi-rings are arranged on the disk surface where the second connecting groove is located, the second semi-ring cooperates with the first semi-ring, the second connecting groove is located between the two second semi-rings, and the second connecting groove is located between the two second semi-rings. A semicircular third screw sleeve is provided at the edge of the disk surface, and the disk surface where the second connecting groove is located is connected to a second flat plate perpendicular to it through a second connecting rod. The second flat plate is located on the line connecting the midpoints of the arc edge and the straight edge of the second semicircular disk and is located within the range of the second semi-ring of the inner circle. Two rows of second clamping grooves are arranged on both side surfaces of the second flat plate, which are staggered and make the second core fiber in the second optical cable fixed to the second flat plate in a state parallel to the central axis of the second semicircular disk. The second clamping groove corresponds to one end of the third clamping groove on the semicircular plate, and an inner rod parallel to it is hinged at the end of the second flat plate, and the length of the inner rod is greater than half of the arc length of the third clamping groove on the outermost circle of the semicircular plate, and the inner rod slides in the rod sleeve.

2. A single-ended junction box according to claim 1, characterized in that: The rod sleeve is hinged in the first receiving groove at the end of the first plate by a second round pin, the second round pin rotates in the first ring sleeve on the first plate surface and is fixedly connected to the rod sleeve, and a first locking bolt is installed in the threaded hole on the first ring sleeve, which cooperates with the first locking groove on the second round pin after the rod sleeve swings out of the first receiving groove by 90 degrees. The inner rod is hinged in the second receiving groove at the end of the second plate by a third round pin, and the third round pin rotates in the second ring sleeve on the second plate surface and is fixedly connected to the inner rod, and a third locking bolt is installed in the threaded hole on the second ring sleeve, which cooperates with the fifth locking groove on the third round pin after the inner rod swings out of the second receiving groove by 90 degrees, and a second locking bolt is installed in the threaded hole on the rod sleeve, which cooperates with the third locking groove and the fourth locking groove on the inner rod, and the center distance between the third locking groove and the fourth locking groove is greater than half of the arc length of the third card groove of the outermost circle on the semicircular plate, and the semicircular plate is hinged to the support ear on the outer side of the end of the first plate by the first round pin, and the first round pin is fixedly connected to the support ear on the first plate.

3. A single-ended junction box according to claim 2, characterized in that: Two limiting rods are installed on both sides of the end of the second plate to cooperate with the straight edges of the semicircular plate, and the limiting rods are installed with elastic locking sheets that cooperate with the second locking grooves on the arc edges of the semicircular plate when the straight edges of the semicircular plate are opposite and parallel to the ends of the first plate and the second plate.

4. A single-ended junction box according to claim 3, characterized in that: A slot is provided on the straight-side end surface of the first semi-circular disk, a first sealing gasket is provided on the straight-side end surface of the first semi-circular disk, the end surfaces at both ends of the first semi-ring, the end surfaces at both ends of the first screw sleeve and the wall surface of the slot, an insert matching the slot is provided on the straight-side end surface of the second semi-circular disk, a second sealing gasket matching the first sealing gasket is provided on the straight-side end surface of the second semi-circular disk, the end surfaces at both ends of the second semi-ring, the end surfaces at both ends of the third screw sleeve and the insert, the first sealing gasket and the second sealing gasket protrude from the first semi-circular disk surface where the first semi-ring is located and the second semi-circular disk surface where the second semi-ring is located, respectively.

5. A single-ended joint box according to claim 4, characterized in that: The first locking structure includes a second screw sleeve, which is threadedly connected to the corresponding end of the first sleeve, one end of the second screw sleeve cooperates with the first sealing ring on the first circular ring outside the first sleeve, and the other end of the second screw sleeve is provided with a first cone portion, and the first cone portion cooperates with a plurality of circumferentially evenly distributed first locking strips provided at the end of the first sleeve, and the first locking strip cooperates with the first optical cable. A second sealing ring cooperating with the first optical cable is provided in the first cone portion.

6. A single-ended joint box according to claim 5, characterized in that: The second locking structure includes a fourth screw sleeve, which is threadedly connected to the corresponding end of the second sleeve, one end of the fourth screw sleeve cooperates with the third sealing ring on the second circular ring outside the second sleeve, and the other end of the fourth screw sleeve is provided with a second cone portion, the second cone portion cooperates with a plurality of circumferentially evenly distributed second locking strips provided at the end of the second sleeve, the second locking strip cooperates with the second optical cable, and a fourth sealing ring cooperating with the second optical cable is provided in the second cone portion.

7. A single-ended joint box according to claim 6, characterized in that: The airtight component includes a shell cover and a fifth screw sleeve, the fifth screw sleeve is threadedly matched with the first screw sleeve and the third screw sleeve, a ring plate matched with the end of the fifth screw sleeve is arranged on the outer side of the cover mouth end of the shell cover, a third ring sleeve is arranged on the inner side of the cover mouth of the shell cover, an annular space with one end open is formed between the third ring sleeve and the shell cover, a third circular ring is arranged on the inner side of the cover mouth end of the shell cover, a seventh sealing ring matched with the disk surface of the first semi-circular disk and the second semi-circular disk and the outer side of the first semi-ring and the second semi-ring of the outer ring is arranged on the end face of the third circular ring, a fourth circular ring is arranged on the outer side of the shell cover cover mouth end of the third ring sleeve, and the fourth circular ring is arranged on the outer side of the shell cover cover mouth end. An eighth sealing ring is arranged on the end face of the ring, which cooperates with the disk surface of the first semi-circular disk and the second semi-circular disk and the inner side of the first semi-ring of the inner ring and the second semi-ring of the inner ring; an elastic bag sealingly bonded with the third ring sleeve is arranged on the inner side of the shell cover; an air supply port and an exhaust port are arranged on the wall surface of the shell cover; the air supply port is connected with the annular space formed by the third ring sleeve, and the exhaust port is connected with the space formed by the elastic bag and the shell cover; a first sealing cover is arranged at the air supply port, and a fifth sealing ring is matched between the first sealing cover and the air supply port; a second sealing cover is arranged at the exhaust port, and a sixth sealing ring is matched between the second sealing cover and the exhaust port.

8. A single-ended joint box according to claim 7, characterized in that: Four first magnets evenly distributed in the circumferential direction are arranged on the outer side of the middle of the elastic bag, and the first magnets cooperate with the second magnets arranged on the inner wall of the shell cover. A plurality of elastic ropes are evenly arranged on the outer side of the top of the elastic bag, and the elastic ropes are connected to the inner wall of the shell cover through patches.

Images