CN216526433U - Airtight sealing device of polarization maintaining optical fiber - Google Patents

Abstract

The utility model relates to an airtight sealing device of a polarization maintaining optical fiber, which comprises a sleeve part, a disc part and a tail attachment part, wherein the sleeve part comprises an armor beam tube and a sleeve; the disc part comprises a disc and a glass tube which is hermetically bonded in the disc, the disc is fixedly connected with the sleeve, the disc is provided with a mounting through hole, the mounting through hole is matched with a mounting screw to fix the disc and the equipment panel, and the glass tube is provided with a through hole for penetrating and mounting the polarization-maintaining optical fiber; the tail attachment component comprises a tail attachment, a crimping sleeve, a protective sleeve and a tail attachment beam tube, wherein the tail attachment is connected to the rear end of the disc, the tail attachment beam tube is crimped at the rear end of the tail attachment through the crimping sleeve, the polarization maintaining optical fiber is movably arranged in the tail attachment beam tube after being attached to the tail, and the protective sleeve is fixedly arranged at the rear end of the tail attachment and sleeved outside the crimping sleeve and the tail attachment beam tube. The utility model is convenient for users to install, use and maintain, effectively avoids the influence of external force on the performance of the polarization maintaining optical fiber and ensures the service performance of the product.

Description

Airtight sealing device of polarization maintaining optical fiber

Technical Field

The utility model belongs to the technical field of optical fiber airtightness, and particularly relates to an airtight sealing device for a polarization maintaining optical fiber.

Background

The polarization maintaining optical fiber is arranged on a panel of the equipment in a penetrating way and needs to be subjected to tensile protection, air sealing and other treatment, and the existing similar air sealing device in the market has the following problems in the using process: (1) after the air-tight device is installed, the air-tight device is inconvenient to disassemble during maintenance; (2) the polarization maintaining optical fiber is damaged by external force; (3) only one of the two sides of the equipment panel is provided with a protective device for preventing the optical fiber from being damaged by external force. In view of the above, it is desirable to design a device that can provide better tensile protection and air sealing functions when the polarization-maintaining optical fiber passes through the device surface.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides an airtight sealing device for a polarization maintaining optical fiber, which realizes the airtight sealing and protection of the optical fiber when passing through an equipment panel, thereby ensuring the service performance of the polarization maintaining optical fiber.

The purpose of the utility model and the technical problem to be solved are realized by adopting the following technical scheme. The utility model provides a hermetic sealing device of a polarization maintaining optical fiber, which comprises: the device comprises a sleeve component, a disc component and a tail attachment component, wherein the sleeve component comprises a spring, a nut, an armor beam tube and a sleeve, the armor beam tube is hermetically arranged inside the front end of the sleeve, the front end of the sleeve is connected with the nut to press and fix the spring, the spring is sleeved on the armor beam tube and used for effectively protecting the armor beam tube from being bent, and a polarization-maintaining optical fiber is movably arranged in the armor beam tube in a penetrating manner; the disc component comprises a disc and a glass tube hermetically arranged in the disc, the front end of the disc is fixedly connected with the rear end of the sleeve, a flange of the disc is provided with an installation through hole, the installation through hole is used for being matched with an installation screw to realize the fixed assembly of the disc and an equipment panel, the glass tube is provided with a through hole which is communicated along the front-back direction and is used for penetrating and installing a polarization-maintaining optical fiber, and adhesive is used for filling a gap between the through hole and the polarization-maintaining optical fiber to realize the air-tight connection of the glass tube and the polarization-maintaining optical fiber; the tail attachment part comprises a tail attachment, a crimping sleeve, a sheath and a tail attachment beam tube, the tail attachment is in a sleeve shape and is in threaded connection with the rear end of the disc, the tail attachment beam tube is fixed at the rear end of the tail attachment in a crimping mode through the crimping sleeve, the polarization maintaining optical fiber is movably arranged in the tail attachment beam tube after the tail attachment, and the sheath is fixedly arranged at the rear end of the tail attachment and sleeved outside the crimping sleeve and the tail attachment beam tube so as to play a protection role.

Furthermore, the armor beam tube is sequentially provided with a sheath, an aramid fiber layer, a stainless steel spiral tube and a thin tube from outside to inside, an inner hole for penetrating and installing a polarization maintaining optical fiber is formed in the middle of the thin tube, the rear end of the thin tube extends backwards into the disc part, the rear end of the aramid fiber layer extends into the inner cavity of the sleeve to form bulk aramid fibers distributed in the inner cavity, the bulk aramid fibers are in a diffusion shape in the axial direction, and after an adhesive is injected into the inner cavity and cured, the bulk aramid fibers are bonded and fixed in the inner cavity; an annular gap is formed between the thin tube and the stainless steel spiral tube, and the annular gap is filled with adhesive to fix the thin tube.

Furthermore, the front end of the inner cavity of the sleeve is provided with a step hole, the step hole is used for fixing the armor bundle pipe through the adhesive, the armor bundle pipe and the sleeve are coaxially arranged, and in addition, after the inner wall of the step hole of the sleeve is fixedly bonded with the outer skin of the armor bundle pipe, the adhesive injected into the inner cavity can be ensured not to overflow from the front end of the sleeve before being cured.

Further, the rear end of the spring is turned outwards to form a radial protrusion, and the radial protrusion is fixed between the sleeve and the nut in a compression joint mode to achieve axial positioning of the spring.

Furthermore, a plurality of mounting holes are formed in the end face of the rear end of the sleeve extending along the radial direction, and the screws penetrate through the corresponding mounting holes and then are connected with the disc to fixedly connect the sleeve part and the disc part; when the armor beam tube is subjected to external force, the external force can be transmitted to the disc through the screw, so that the polarization maintaining optical fiber is not influenced by the external force.

Further, the disc outer wall is equipped with the mounting groove, and the mounting groove is used for the installation with the equipment interface cooperation on the equipment panel in order to play sealed O shape circle.

Furthermore, the outer wall of the tail attached rear end is provided with a knurl connected with the tail attached beam tube through a compression joint and compression joint sleeve.

Furthermore, the tail attaches the beam tube outside-in and is equipped with beam tube crust, beam tube aramid fiber and tail in proper order and attaches the tubule, and the tail attaches the tubule and has the pore that supplies polarization maintaining fiber activity to wear to adorn, and the beam tube crust plays the guard action to beam tube aramid fiber and tail attach the tubule, attaches the beam tube when receiving outside pulling force at the tail the beam tube aramid fiber plays tensile effect, protects the tail and attaches the polarization maintaining fiber in the tubule and not influenced by external force.

Furthermore, the outer circumferential surface of the tail part is provided with a limiting groove, the inner wall of the front end of the sheath is provided with an inner bulge, and the inner bulge falls into the limiting groove after the sheath is installed in place and is in stop fit with the limiting groove in the front-back direction so as to limit the axial position of the sheath.

Furthermore, a stepped hole used for realizing the limit of the front end when the glass tube is installed is arranged in the disc, and the adhesive is used for filling the gap between the glass tube and the stepped hole, so that the sealing and the fixing between the glass tube and the disc are realized.

By means of the technical scheme, the utility model has the beneficial effects that: the airtight sealing device is connected with the equipment panel through the mounting screw, so that the installation, the use and the maintenance of a user are facilitated; in addition, the sleeve component and the tail attached component are arranged outside the polarization maintaining optical fiber for protection, so that damage to the polarization maintaining optical fiber caused by external force can be avoided in all directions on two sides of the equipment panel, and the use performance of a product is ensured.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a cross-sectional view of a hermetic sealing apparatus for a polarization maintaining optical fiber according to the present invention;

FIG. 2 is a cross-sectional view of a sleeve member according to the present invention;

FIG. 3 is a cross-sectional view of an armor bundle tube in accordance with the present invention;

FIG. 4 is a cross-sectional view of a disc member in the present invention;

FIG. 5 is a cross-sectional view of a trailing attachment member of the present invention;

FIG. 6 is a cross-sectional view of a bundle tube according to the present invention;

FIG. 7 is an isometric view of the sleeve of the present invention;

FIG. 8 is a cross-sectional view of the sleeve of the present invention;

FIG. 9 is an isometric view of a disk of the present invention;

FIG. 10 is a cross-sectional view of a disk of the present invention;

FIG. 11 is an isometric view of the tailpiece of the present invention;

FIG. 12 is an isometric view of a crimp sleeve in accordance with the present invention.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 to 5, the airtight sealing device for the polarization maintaining optical fiber comprises a sleeve part 1, a disc part 2 and a tail part 3, wherein the sleeve part 1 is connected with the disc part 2 through a screw, and the disc part 2 is connected with the tail part 3 through a thread; in the present embodiment, the direction from the sleeve member 1 to the tail member 3 is from front to back.

The sleeve component comprises a spring 4, a nut 5, an armor bundle tube 6, a sleeve 7 and a screw 8, a step hole 702 is formed in the front end of an inner cavity 701 of the sleeve 7, the step hole 702 is used for fixing the armor bundle tube 6 through adhesive, the armor bundle tube 6 and the sleeve 7 are coaxially sleeved, and the armor bundle tube 6 extends out of the front end of the sleeve 7. The front end of the sleeve 7 is in threaded connection with the nut 5 and is used for fixing the spring 4 in a press-fitting mode; the rear end of the spring 4 is provided with a radial protrusion 401 for realizing self axial limiting, the spring 4 is sleeved on the armor beam tube 6, the radial protrusion 401 is clamped/pressed and fixed between the sleeve 7 and the nut 5, and the spring 4 is used for preventing the armor beam tube 6 from being bent; specifically, when the polarization maintaining fiber 16 is pulled out from the front end of the armor bundle tube 6, the inner fiber is damaged if the armor bundle tube 6 is bent, and therefore the spring 4 can provide a buffering force for bending, thereby protecting the armor bundle tube 6. A plurality of mounting holes 703 for mounting or accommodating screws 8 are formed in the end surface of the sleeve 7 extending in the radial direction, and the number of the mounting holes is determined by the required number of the screws; when the sleeve component 1 is assembled, firstly, the armor bundle tube 6 is fixedly arranged in a step hole at the front end of an inner cavity of the sleeve 7 through an adhesive, the adhesive is injected into the inner cavity 701, after the adhesive is cured, the spring 4 is arranged in the nut 5, the nut 5 is clamped by the radial bulge 401 at the rear end of the spring 4 to limit the axial position of the spring, and then the internal thread of the nut 5 is matched with the external thread of the sleeve 7, so that the nut 5 is connected with the sleeve 7; then, the polarization maintaining optical fiber 16 is installed into the sleeve part 1, the screw 8 is installed into a corresponding installation hole at the rear end of the sleeve, the screw 8 is matched with the rear end face of the sleeve 7 to achieve axial limiting of the screw 8, the armor beam tube 6 can transmit external force to the screw 8 when being subjected to the external force and further transmit the external force to the disc 13, the polarization maintaining optical fiber 16 is not influenced by the external force, and the use performance of the polarization maintaining optical fiber 16 is guaranteed.

As shown in fig. 3, the armor bundle tube 6 sequentially comprises a sheath 9, an aramid fiber layer 10, a stainless steel spiral tube 11 and a tubule 12 from outside to inside, wherein the sheath 9 has temperature resistance, pressure resistance and tensile force resistance, the stainless steel spiral tube 11 is used for providing stronger compressive resistance, the aramid fiber layer 10 has tensile resistance, and an inner hole 1201 for accommodating the polarization maintaining optical fiber 16 is arranged in the middle of the tubule 12. With reference to fig. 2, the rear end of the aramid fiber layer 10 extends into the inner cavity 701 to form bulk aramid fibers 1001 located in the inner cavity 701, the bulk aramid fibers 1001 are diffused in the axial direction and densely distributed in the circumferential direction, and after the adhesive is injected into the inner cavity 701 and cured, the bulk aramid fibers 1001 are bonded in the inner cavity 701 by the adhesive; when the armor bundle tube 6 is pulled by external force, the external force is transmitted to the sleeve 7 to play a role of tensile strength. The rear end of the tubule 12 also extends backwards into the inner cavity 701 and reaches the disc part, so that the situation that the adhesive enters the tubule 12 by mistake in the process of injecting the adhesive into the inner cavity 701 to cause that the polarization-maintaining optical fiber cannot penetrate into the tubule is prevented, and meanwhile, the polarization-maintaining optical fiber 16 is movably arranged in the sleeve part.

As shown in fig. 4, the disk member includes a disk 13, an O-ring 14, and a glass tube 15, the glass tube 15 is mounted in the disk 13, the center of the disk 13 is penetrated forward and backward, and the disk 13 is fixed to the glass tube 15 by an adhesive. The glass tube 15 is provided with a through hole 1501 which is hermetically connected with the polarization maintaining optical fiber 16 by using an adhesive; be equipped with in the disc 13 and be used for the spacing shoulder hole 1301 of glass pipe 15 front end butt, disc 13 outer wall is equipped with mounting groove 1304, and the mounting groove is used for the installation to play sealed O shape circle 14 with the equipment interface cooperation, and the flange 1302 of disc 13 is equipped with the installation through-hole 1303 that is used for cooperation installation screw 1305 and equipment panel fixed mounting. When the disc component is assembled, the glass tube 15 is arranged in the stepped hole 1301 in the inner cavity of the disc 13, the adhesive is used for filling the gap between the glass tube 15 and the disc 13, sealing and fixing between the glass tube 15 and the disc 13 are achieved, the polarization maintaining optical fiber 16 penetrates through the through hole 1501 of the glass tube 15 after the adhesive is cured, the adhesive is used for filling the gap between the through hole 1501 and the polarization maintaining optical fiber 16, air sealing and relative fixing between the glass tube 15 and the polarization maintaining optical fiber 16 are achieved, the O-shaped ring 14 is arranged in the installation groove of the disc 13 and matched with an equipment interface to achieve radial sealing, the disc 13 is connected with the equipment panel through the installation screw 1305, external force borne by the disc 13 is transmitted to the equipment panel, and the air-tight sealing device is protected to have good use performance.

As shown in fig. 5, the tail attachment member includes a tail attachment 17, a crimping sleeve 18, a sheath 19, and a tail attachment bundle tube 20. The tail attachment 17 is in a sleeve shape, the outer wall of the rear end of the tail attachment 17 is provided with a knurl 1703 connected with the tail attachment beam tube 20 through a crimping sleeve 18, and the front end of the tail attachment 17 is provided with an external thread 1701 in threaded connection with the disc 13. As shown in fig. 6, the tail-attached beam tube 20 is sequentially provided with a beam tube outer skin 2001, a beam tube aramid fiber 2002 and a tail-attached thin tube 2003 from outside to inside, the tail-attached thin tube is provided with a fine hole 2004 for movably penetrating the polarization-maintaining optical fiber 16, the beam tube outer skin 2001 plays a role in protecting the beam tube aramid fiber and the tail-attached thin tube, and when the tail-attached beam tube 20 is subjected to external tension, the beam tube aramid fiber 2002 plays a role in stretching, so that the polarization-maintaining optical fiber 16 in the tail-attached thin tube is protected from external force. The outer circumference of the tail attachment 17 is provided with a limiting groove 1702 for limiting the axial movement of the sheath. During assembly, the external thread of the tail attachment 17 is connected with the internal thread of the disc 13 to realize the connection of the disc component 2 and the tail attachment component 3, the polarization maintaining optical fiber 16 is arranged in the tail attachment beam tube 20, the front end of the tail attachment beam tube is arranged at the knurling position, the crimping sleeve 18 is arranged at the knurling position of the tail end of the tail attachment 17, namely, the front end of the crimping sleeve 18 is sleeved at the knurling position of the tail end of the tail attachment 17, the rear end of the crimping sleeve 18 is sleeved on the tail attachment beam tube 20, and the crimping tool is used for crimping to realize the fixation of the tail attachment beam tube 20. Then, the front end of the sheath 19 is pushed to the stopper groove 1702, so that the inner protrusion 1901 of the front end of the sheath 19 falls into the stopper groove 1702 to restrict the axial position of the sheath 19. When the tail attached beam tube 20 is under external tension, the sheath 19 can prevent the tail attached beam tube 20 from being bent to a certain extent, meanwhile, the tail attached beam tube 20 can transmit the external tension to the disc 13 through the compression joint sleeve 18 and the tail attached tube 17, the disc 13 transmits the tension to the equipment panel through the mounting screw, and the polarization maintaining optical fiber 16 is free from external force in the airtight sealing device and is in a natural state. Therefore, when external acting force exists on any one side or two sides of the equipment panel, the polarization maintaining optical fiber module can provide tensile protection capability for the polarization maintaining optical fiber, and the polarization maintaining optical fiber penetrating out of the tail attachment part is finally manufactured into an optical fiber connector (such as an FC/LC joint connector) butted with equipment, so that the signal transmission function is realized.

As can be seen from fig. 3, an annular space is formed between the spiral stainless steel tube 11 and the narrow tube 12, the narrow tube 12 is movably disposed before the adhesive is injected, and after the adhesive is injected, the adhesive fills the annular space, so that the narrow tube 12, the spiral stainless steel tube 11 and the sleeve 7 are adhered and fixed together; the thin tube 12 is movably arranged so as not to limit the installation of only one thin tube, and one thin tube can be inserted into the thin tube under the working condition that two thin tubes are required. The polarization maintaining optical fiber 16 penetrated and installed in the tubule 12 can move in the tubule 12, and there is no relative fixed relation between the two, because the performance of the polarization maintaining optical fiber is affected by a little external force, the optical fiber can be movably arranged in the tubule to reduce the damage of stress to the optical fiber. Similarly, the tail attaching tubule 2003 in the tail attaching beam tube 20 and the polarization maintaining fiber 16 are in a relative movable penetrating relationship; the utility model ensures that the polarization maintaining optical fiber 16 is in a free moving state except for the bonding position (namely the connecting position of the polarization maintaining optical fiber 16 and the glass tube 15), thereby ensuring the usability of the polarization maintaining optical fiber 16 and the realizability of the assembly process. The tail attaching tubule 2003 in the tail attaching beam tube 20 is also movably arranged, a gap is formed between the tail attaching tubule 2003 and the aramid fiber 2002 of the beam tube to improve the compression and tensile resistance, and after the polarization maintaining optical fiber led out from the rear end of the tail attaching part 3 is made into a conventional optical fiber connector such as FC, the tail attaching tubule 2003 is positioned in the position in the tail attaching beam tube 20 shown in the figure and cannot be pulled out from the rear end.

In the embodiment, the nut 5 is screwed at the front end of the sleeve 7 in a thread form to fix the spring; in another embodiment, the nut 5 may not be provided with an internal thread, but may be quickly assembled with the sleeve by a snap structure.

In this embodiment, the disc 13 is connected to the sleeve 7 by means of screws 8; in another embodiment, a threaded fit, snap fit, or the like may be used.

In this embodiment, radial sealing is realized by the O-ring 14, and in another embodiment, at least one sealing ring for realizing end face sealing with the equipment panel may be further embedded in the rear end face of the flange.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art can make any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the present invention without departing from the scope of the present invention, and still fall within the scope of the present invention.

Claims (10)

1. A hermetic sealing device for a polarization maintaining optical fiber, comprising: the device comprises a sleeve component, a disc component and a tail attachment component, wherein the sleeve component comprises a spring, a nut, an armor beam tube and a sleeve, the armor beam tube is arranged inside the front end of the sleeve, the front end of the sleeve is connected with the nut to press and fix the spring, the spring is sleeved on the armor beam tube, and a polarization-maintaining optical fiber is movably arranged in the armor beam tube in a penetrating manner; the disc component comprises a disc and a glass tube which is hermetically bonded in the disc, the front end of the disc is fixedly connected with the rear end of the sleeve, a flange of the disc is provided with a mounting through hole, the mounting through hole is used for being matched with a mounting screw to realize the fixed assembly of the disc and an equipment panel, the glass tube is provided with a through hole which is communicated along the front-back direction and is used for penetrating and installing a polarization maintaining optical fiber, and an adhesive is used for filling a gap between the through hole and the polarization maintaining optical fiber to realize the sealed and fixed connection of the glass tube and the polarization maintaining optical fiber; the tail attachment part comprises a tail attachment, a crimping sleeve, a sheath and a tail attachment beam tube, the tail attachment is in a sleeve shape and is in threaded connection with the rear end of the disc, the tail attachment beam tube is fixed at the rear end of the tail attachment in a crimping mode through the crimping sleeve, the polarization maintaining optical fiber is movably arranged in the tail attachment beam tube after the tail attachment, and the sheath is fixedly arranged at the rear end of the tail attachment and is sleeved outside the crimping sleeve and the tail attachment beam tube.

2. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the armor bundle tube is sequentially provided with a sheath, an aramid fiber layer, a stainless steel spiral tube and a thin tube from outside to inside, an inner hole for penetrating and installing a polarization-maintaining optical fiber is arranged in the middle of the thin tube, the rear end of the thin tube extends backwards into the disc part, the rear end of the aramid fiber layer extends into the inner cavity of the sleeve to form bulk aramid fibers distributed in the inner cavity, the bulk aramid fibers are in a diffusion shape in the axial direction, and after an adhesive is injected into the inner cavity and cured, the bulk aramid fibers are bonded and fixed in the inner cavity; an annular gap is formed between the thin tube and the stainless steel spiral tube, and the annular gap is filled with adhesive to fix the thin tube.

3. A hermetic sealing device for a polarization maintaining optical fiber according to claim 2, wherein: the front end of the inner cavity of the sleeve is provided with a step hole, the step hole is used for fixing the armor bundle pipe through a bonding agent, the armor bundle pipe and the sleeve are coaxially arranged, and the bonding agent injected into the inner cavity can be prevented from overflowing from the front end of the sleeve before curing after the step hole is fixedly matched with the outer skin of the armor bundle pipe.

4. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the rear end of the spring is provided with a radial bulge, and the radial bulge is fixed between the sleeve and the nut in a compression joint mode so as to realize axial positioning of the spring.

5. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the rear end of the sleeve is provided with a plurality of mounting holes along the end surface extending along the radial direction, and the screw penetrates through the corresponding mounting hole and then is connected with the disc so as to realize the fixed connection of the sleeve part and the disc part; when the armor beam tube is subjected to external force, the external force can be transmitted to the disc through the screw, so that the polarization maintaining optical fiber is not influenced by the external force.

6. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the disc outer wall is equipped with the mounting groove, and the mounting groove is used for the installation with the equipment interface cooperation on the equipment panel in order to play sealed O shape circle.

7. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the outer wall of the tail attached rear end is provided with a knurl connected with the tail attached beam tube through a compression joint sleeve.

8. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the tail attaches beam tube outside-in and is equipped with beam tube crust, beam tube aramid fiber and tail in proper order and attaches the tubule, and the tail attaches the tubule and has the pore that supplies the activity of polarization maintaining fiber to wear the dress, and the beam tube crust plays the guard action to beam tube aramid fiber and tail attached tubule, attaches when beam tube receives outside pulling force at the tail the beam tube aramid fiber plays tensile effect, protects the tail and attaches the polarization maintaining fiber in the tubule and not influenced by external force.

9. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: the outer circumference of the tail is provided with a limiting groove, the inner wall of the front end of the sheath is provided with an inner bulge, and the inner bulge falls into the limiting groove after the sheath is installed in place and is in blocking fit with the limiting groove in the front and rear directions so as to limit the axial position of the sheath.

10. A hermetic sealing device for a polarization maintaining optical fiber according to claim 1, wherein: be equipped with the spacing shoulder hole of front end when being used for realizing the installation of glass pipe in the disc, use the adhesive to fill the clearance of glass pipe and shoulder hole to realize sealed and fixed between glass pipe and the disc.

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