Optical cable insulation box

Abstract

The utility model relates to an optical cable insulation box, which solves the problems of reliability of communication signal transmission in an optical cable fiber core and grounding of induced high voltage. The broken metal reinforced steel core is fixed on a reinforced core fixing column of an insulation device in an insulation joint, the reinforced steel core at an external leading-in end is connected with a grounding device on a box cover through a connecting wire, and then the grounding device outside the box cover is connected to a combined ground wire device of a communication machine room through a wire not smaller than 16 m < 2 >; induced high voltage and large current are introduced into the ground, protection of communication equipment in a communication machine room is completed, and safety of the communication equipment and personal safety is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the electrical insulation and grounding treatment device of the reinforcing steel core and steel belt armoring of the optical cable in front of the railway station communication equipment. BACKGROUND

[0002] Because the transmission channel uses a large number of optical cables in railway communication, the high voltage and large current of electrified railway traction power supply and lightning will induce high voltage on the metal sheath and reinforcing steel core of the optical cable when the optical cable is introduced into the railway communication machine room, if the induced high voltage is not isolated and introduced into the ground, it will be transmitted into the railway communication machine room through the metal sheath and reinforcing steel core, which will affect the communication equipment and personal safety, and in severe cases, will cause equipment damage and endanger personal safety. SUMMARY

[0003] The utility model aims at providing an optical cable insulation box which can ensure the operation safety of the optical fiber in the optical cable and the railway station communication equipment, ensure the reliability of the communication signal transmission in the optical cable fiber core, and at the same time, can introduce the dangerous high voltage into the comprehensive grounding device of the railway for grounding, and is convenient to install.

[0004] The utility model is realized in the following way:

[0005] The cable insulation box is provided with a plurality of through holes on the side frames of the box cover 1 and the box bottom 2, and a set of clamping slots on the two ends of the box cover 1 and the box bottom 2 respectively, the structure of the clamping slots on the outer side of the box bottom 2 is provided with four through holes corresponding to the four through holes on the first and second cable pressing clamps 3-1 and 3-2, the optical cable passes through the inner cavity formed by the box cover 1 and the box bottom 2 connected by the first bolt 4 and the first nut 5 in the axial direction, the optical cable is fixed between the box bottom 2 and the first and second cable pressing clamps 3-1 and 3-2 at the entrances of the two ends of the box bottom 2 by the second bolt 6 and the second nut 7, the inner cavity of the box bottom 2 is provided with a rectangular insulation block 8, the optical cable is fixed between the rectangular insulation block 8 and the third and fourth cable pressing clamps 3-3 and 3-4 by the bolt 9 and the third nut 10, the rectangular insulation block 8 is provided with two through holes on the long axis and is provided with the first and second slotted bolts 11-1 and 11-2, the outer sheath and the metal sheath of the optical cable between the first and second slotted bolts are stripped to expose the reinforcing steel core and the optical fiber, the middle section of the exposed reinforcing steel core is cut off to form left and right reinforcing steel cores in the inner cavity, the left reinforcing steel core is bent after passing through the first slotted bolt 11-1 on the left side of the rectangular insulation block 8 and is fixed by the fourth nut 12, the right reinforcing steel core is bent after passing through the second slotted bolt 11-2 on the right side of the rectangular insulation block 8 and is fixed by the fourth nut 12, the optical fiber reinforcing steel core is disconnected and fixed, one end of the first grounding wire 14 is fixed on the metal sheath of the outdoor incoming optical cable by a throat clamp, the other end of the first grounding wire 14 is fixed on the second slotted bolt 11-2 where the reinforcing steel core of the outdoor incoming optical cable is located by a copper nose, the copper nose of one end of the second grounding wire 15 is also fixed on the second slotted bolt 11-2 where the reinforcing steel core of the outdoor incoming optical cable is located, and the copper nose of the other end of the second grounding wire 15 is fixed on the grounding terminal 13 of the box cover 1, and the optical cable is fixed in the insulation section by the electrical tape 16. 2 The double-color ground wire is connected with the grounding terminal 13 of the box cover 1 at one end and is connected with the joint ground wire device of the communication room at the other end, so that the outdoor induced high voltage and large current are introduced into the ground.

[0006] The outer side of the box bottom 2 is embedded with a self-adhesive tape in the groove parallel to the edge of the inner cavity.

[0007] The optical cable introduced into the insulation section is wrapped with the electrical tape at the sheath position corresponding to the cable pressing clamps at the two ends of the box bottom, so that the outer diameter of the optical cable is increased to meet the fixation of the optical cable in the box bottom.

[0008] The insulation section is provided with the self-adhesive tape at the optical cable inlet and outlet.

[0009] The upper and lower surfaces of the insulation section are in the shape of a cuboid.

[0010] The advantages of the utility model are as follows:

[0011] The steel core and steel tape armor of the optical cable are electrically insulated before the optical cable is introduced into the railway communication room, and the ground wire led out by the insulation joint is connected to the comprehensive grounding device of the communication room, so that the induced high voltage and current are introduced into the comprehensive grounding device of the railway room, the operation safety of the optical fiber in the optical cable and the communication equipment of the railway station is ensured, and the optical cable is provided with good anti-external force and air sealing performance to ensure the reliability of the communication signal transmission in the optical cable core. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The assembly drawing of the utility model.

[0013] Figure 2 The assembly drawing of the utility model in the grounded state after the optical cable is introduced. DETAILED DESCRIPTION

[0014] The optical cable insulation box is provided with a plurality of through holes corresponding to each other on the side frames of the box cover 1 and the box bottom 2, and a set of clamping grooves corresponding to each other in the axial direction are arranged at the two ends of the box cover 1 and the box bottom 2, respectively. The structure outside the clamping groove of the box bottom 2 is provided with four through holes corresponding to the four through holes on the first and second cable clamping 3-1 and 3-2. The optical cable passes through the inner cavity formed by the box cover 1 and the box bottom 2 connected by the first bolt 4 and the first nut 5 in the axial direction. The optical cable is fixed between the box bottom 2 and the first and second cable clamping 3-1 and 3-2 at the inlet of the two ends of the box bottom 2 by the second bolt 6 and the second nut 7. The inner cavity of the box bottom 2 is provided with a rectangular insulating block 8. The optical cable is fixed between the rectangular insulating block 8 and the third and fourth cable clamping 3-3 and 3-4 by the bolt 9 and the third nut 10. The rectangular insulating block 8 is provided with two through holes on the long axis and is provided with the first and second slotted bolts 11-1 and 11-2. The outer sheath and metal sheath of the optical cable between the first and second slotted bolts are stripped to expose the steel core and the optical fiber. The middle section of the exposed steel core is cut off to form left and right steel cores in the inner cavity. The left steel core passes through the first slotted bolt 11-1 on the left side of the rectangular insulating block 8, is bent and is fixed by the fourth nut 12. The right steel core passes through the second slotted bolt 11-2 on the right side of the rectangular insulating block 8, is bent and is fixed by the fourth nut 12. The optical fiber and the steel core are disconnected and fixed. One end of the first grounding wire 14 is fixed to the metal sheath of the outdoor introduced optical cable by a throat clamp. The other end of the first grounding wire 14 is fixed to the second slotted bolt 11-2 where the steel core of the outdoor introduced optical cable is located by a copper nose. The copper nose at one end of the second grounding wire 15 is also fixed to the second slotted bolt 11-2 where the steel core of the outdoor introduced optical cable is located. The copper nose at the other end of the second grounding wire 15 is fixed to the grounding terminal 13 of the box cover 1. The 16 m 2 The double-color ground wire is connected to the grounding terminal 13 of the box cover 1 at one end and is connected to the joint ground wire device of the communication room at the other end, so that the outdoor induced high voltage and large current are introduced into the ground.

[0015] The outer side edge groove parallel to the inner cavity edge of the box bottom 2 is embedded with a self-adhesive tape.

[0016] The optical cable introduced into the insulation section is wrapped with an electrician's tape at the sheath position corresponding to the cable clamp at both ends of the box bottom, so as to increase the outer diameter of the optical cable to meet the fixation of the optical cable in the box bottom.

[0017] The insulation section has a self-adhesive tape at the optical cable inlet and outlet.

[0018] The upper and lower faces of the insulation section are planar and the whole is a cuboid.

[0019] 1. Clean the optical cable within 1 m range that needs to be electrically insulated, strip 220 mm long in the middle of the optical cable, remove the inner and outer sheaths of the optical cable and clean them;

[0020] 2. Use a wire stripper to cut off 20 mm of the middle part of the optical cable reinforcing core;

[0021] 3. Use a tool to remove the outer sheath 15 mm at the cut of the optical cable at the end where the ground wire is needed to be exposed to the metal sheath;

[0022] 4. Open the optical cable insulation box, remove the cable clamp at both ends of the box bottom 2 and the rectangular insulation block 8;

[0023] 5. Pass the reinforcing steel core of the optical cable at both ends into the M10 slotted bolt 11 on the rectangular insulation block 8 respectively, ensure that the distance between the reinforcing steel cores of the optical cables on both sides is 10 mm, bend the reinforcing steel core that exceeds the M10 slotted bolt 11 and tighten the M10 nut 12;

[0024] 6. Fix the optical cable at both ends of the rectangular insulation block 8 between the cable clamp 3-3, 3-4 and the rectangular insulation block 8 with M5 stainless steel bolts 9 and M5 stainless steel nuts 10;

[0025] 7. Put the rectangular insulation block 8 into the box bottom 2, wrap the self-adhesive tape on the outer sheath of the optical cable at the cable inlet on the inner side of the cable clamp at both ends of the box bottom 2, and the outer diameter of the optical cable wrapped with the self-adhesive tape is slightly larger than the inner diameter of the sealing groove of the cable inlet of the box bottom 2;

[0026] 8. Fix the rectangular insulation block 8 in the box bottom 2 and fix the optical cable on both sides of the box bottom under the cable clamp 3-1, 3-2 at both ends of the box bottom 2 with M5 stainless steel bolts 9 and M5 stainless steel nuts 10;

[0027] 9. Fix the tab at one end of the ground wire 14 to the metal sheath of the outdoor optical cable that needs to be grounded with a hose clamp, fix the copper nose at the other end of the ground wire 14 to the slotted bolt 11 where the reinforcing steel core of the optical cable is located; fix the copper nose at one end of the ground wire 15 to the M10 slotted bolt 11 where the reinforcing steel core of the optical cable is located, and fix the copper nose at the other end of the ground wire 15 to the grounding terminal 13 of the box cover 1;

[0028] 10. Insert the self-adhesive strip into the groove on both sides of the box bottom 2 and cut off the excess part;

[0029] 11. Cover the box cover, lock the box cover 1 and the box bottom 2 after buckling with M6 stainless steel bolts 4 and M6 stainless steel nuts 5, and complete the sealing of the optical cable insulation box.

Claims

1. An optical cable insulation box, characterized in that, The cover (1) and bottom (2) of the box have several corresponding through holes on their side frames. The cover (1) and bottom (2) of the box have a set of slots that are axially corresponding at both ends. The outer structure of the slots of the bottom (2) has four through holes that correspond to the four through holes on the first and second cable clamps (3-1, 3-2). The optical cable passes axially through the cavity formed by the cover (1) and bottom (2) connected by the first bolt (4) and the first nut (5). At the entrances at both ends of the bottom (2), the second bolt (6) and the second nut (5) are connected by the second bolt (6) and the second nut (5). Nut (7) fixes the optical cable between the bottom of the box (2) and the first and second cable clamps (3-1, 3-2). The inner cavity of the bottom of the box (2) is provided with a rectangular insulating block (8). The optical cable is fixed between the rectangular insulating block (8) and the third and fourth cable clamps (3-3, 3-4) by bolts (9) and the third nut (10). The long axis of the rectangular insulating block (8) has two through holes, and the first and second slotted bolts (11-1, 11-2) are installed. The outer sheath of the optical cable between the first and second slotted bolts and The metal sheath is removed, exposing the reinforcing steel core and optical fiber. The middle section of the exposed reinforcing steel core is cut off, forming left and right reinforcing steel cores in the inner cavity. The left reinforcing steel core passes through the first slotted bolt (11-1) on the left side of the rectangular insulating block (8), bends, and is tightened with the fourth nut (12). The right reinforcing steel core passes through the second slotted bolt (11-2) on the right side of the rectangular insulating block (8), bends, and is tightened with the fourth nut (12), thus achieving the disconnection and fixation of the optical fiber reinforcing steel core. One end of the first grounding wire (14) is fixed to the metal sheath of the outdoor optical cable with a hose clamp. The other end of the first grounding wire (14) is fixed to the second slotted bolt (11-2) where the reinforcing steel core of the outdoor optical cable is located with a copper lug. The copper lug at one end of the second grounding wire (15) is also fixed to the second slotted bolt (11-2) where the reinforcing steel core of the outdoor optical cable is located. The copper lug at the other end of the second grounding wire (15) is fixed to the grounding terminal (13) of the cover (1). 2 One end of the two-color ground wire is connected to the grounding terminal (13) of the box cover (1), and the other end is connected to the joint grounding device of the communication equipment room, so as to introduce the outdoor induced high voltage and large current into the ground.

2. The optical cable insulation box as described in claim 1, characterized in that, The bottom (2) of the box has a self-adhesive strip embedded in the outer groove parallel to the edge of the inner cavity.

3. The optical cable insulation box as described in claim 1, characterized in that, The optical cable introduced into the insulating joint has electrical tape wrapped around the sheath at the position corresponding to the cable clamps at both ends of the bottom of the box.

4. The optical cable insulation box as described in claim 1, characterized in that, There is self-adhesive tape at the inlet and outlet of the insulating joint for optical cables.

5. The optical cable insulation box as described in claim 1, characterized in that, The whole thing is a cuboid.

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